KR20040048955A - Indoor unit of packaged air conditioner - Google Patents

Abstract

PURPOSE: An indoor unit of a package air conditioner is provided to employ a cross flow fan at a proper position to reduce the system resistance, thereby reducing the power consumption and noise. CONSTITUTION: An indoor unit of a package air conditioner includes a cabinet(101), an evaporator(104), a cross flow fan(110), and a separator(106). The cabinet is formed with an outlet grill(103) and an inlet grill(102) at upper and lower ends respectively for forming a room air circulation space. The evaporator is slantly provided to an upper part in the cabinet for cooling the room air by gasifying heat of a refrigerant. The cross flow fan is provided at a lower part in the cabinet for inhaling room air via the inlet grill and discharging the air to the evaporator, wherein the suction air and the discharge air are coexisting at the same height. The separator is provided on the cross flow fan for preventing the interference between the suction air and the discharge air.

Description

Indoor unit of package air conditioner {INDOOR UNIT OF PACKAGED AIR CONDITIONER}

In general, an air conditioner is a type of air conditioner for cooling and circulating and purifying air for the purpose of air conditioning in a room. This air conditioner can be divided into a unit type that is part of the refrigeration cycle (one unit) is provided in one unit (unit) and a separate type that is provided separately in two units, and also the wall hanging to hang the indoor unit on the wall according to the product type The mold and the indoor unit can be divided into the upper mold and the indoor unit suspended from the ceiling or the ceiling type installed inside the ceiling.

Among them, a packaged air conditioner is a split-type type that is mounted on the floor of the room to cool a relatively large indoor space, and is a kind of air conditioner that is widely used in recent years. The package air conditioner liquefies the refrigerant gas compressed in the compressor by heat exchange with the outdoor air in the condenser, and then heat exchanges the refrigerant liquid past the expansion valve with the indoor air in the evaporator. The room is cooled by using the heat of vaporization of the refrigerant generated at this time.

Accordingly, the package air conditioner is generally divided into an outdoor unit for compressing and liquefying a refrigerant by incorporating a compressor and a condenser, and an indoor unit for cooling indoor air by evaporating the refrigerant by incorporating an evaporator. to be.

Hereinafter, the structure of the indoor unit of the package air conditioner will be described with reference to the accompanying drawings.

1A and 1B are front and side views respectively illustrating an indoor unit of a general package air conditioner.

1A and 1B, the indoor unit of the package air conditioner includes a case 1 having an inlet grill 2 at the bottom front and an outlet grill 3 at the top front; It is composed of an evaporator (4) to be installed obliquely on the upper side of the case to cool the indoor air, and a blower (blower) (10) provided below the evaporator to forcibly suck the indoor air and discharge it to the evaporator side.

The blower 10 is located at the rear of the suction grill 2 for smooth suction of indoor air. In this case, as a centrifugal fan, a silocco fan is generally used as the blower. The sirocco fan 10 sucks air in the axial direction and discharges it in the radial direction. For this purpose, the rotating shaft is installed in the width direction of the case 1, and an impeller (impeller) is formed of a plurality of blades bent in the rotational direction. 11), a scroll housing 12 which surrounds the outer periphery of the impeller and forms a flow path of discharge air, and a motor 15 coupled to the rotating shaft of the impeller. At this time, the discharge port of the scroll housing 12 is open toward the upper evaporator 4.

In the sirocco fan configured as described above, the indoor air sucked into the eye of the impeller 11 is discharged in the counterclockwise direction of the impeller by the rotational movement of the blade, and then the evaporator 4 is discharged through the discharge port of the scroll housing 12. You are guided to.

On the other hand, the lower end of the evaporator (4) is provided with a drain pan (drain pan, 5) for collecting a large amount of condensate generated on the surface of the evaporator in the process of cooling the air, a separate drain pipe at the lower end of the drain pan (Not shown) is formed with a condensate outlet 5a.

The package air conditioner configured as described above is operated while the sirocco fan 10 is powered by indoor air or under a set temperature or by a forced operation by a user. The indoor air is sucked in the axial direction of the sirocco fan 10 through the suction grill 2 and discharged to the evaporator side through the discharge port of the scroll housing 12 by the operation of the sirocco fan. At this time, the room air is cooled by the endothermic action of the refrigerant while passing through the evaporator (4), and then discharged into the room through the discharge grill (3) to cool the room.

However, the following problems have been raised by applying the sirocco fan as a blower in the package air conditioner as described above.

First, while the sirocco fan 10 has the advantage that the rotational speed is considerably smaller and the overall size is smaller than the other types in the same air flow rate, the flow structure as described above is considerably disadvantageous in producing a fixed pressure air flow rate. .

Second, the flow path structure of the sirocco fan as described above is an unsuitable flow path structure for the indoor unit of the package air conditioner, which causes the system resistance to increase. That is, the sirocco fan 10 has a flow path structure in which air is sucked in the axial direction of the impeller 11 and discharged radially, but toward the evaporator 4 located above the sirocco fan in the indoor unit of the package air conditioner. In order for the air to be discharged, the discharged air must be guided by the scroll housing 12, and in this process, the flow path resistance of the air is significantly generated. As a result, this flow resistance not only increases power consumption, but also causes considerable noise during operation.

This problem has been raised in the recent three-sided suction package air conditioner. That is, the indoor air sucked through the suction grill located at the corner between the front and both sides of the case is sucked in the axial direction of the sirocco fan while receiving a considerable flow resistance. Therefore, power consumption is inevitably high at the same amount of air and considerable noise is generated.

Third, the indoor unit of the conventional package air conditioner has a limitation in reducing the overall width of the system by applying the sirocco fan 10. That is, the sirocco fan 10 has a rotation shaft of the impeller 11 along the width direction of the case 1 due to the nature of the flow path structure and the motor 15 should be installed at one end of the rotation shaft. Therefore, in the indoor unit of the conventional package air conditioner, its width was inevitably determined by the length of the impeller 11 of the sirocco fan and the size of the motor 15. However, since the impeller length of the sirocco fan must be secured for a predetermined length or more in order to obtain a certain amount of air, it was impossible to finally thin the case.

The present invention relates to a package air conditioner, and more particularly, by applying a crossflow fan to a blower forcibly sucking indoor air and discharging it to an evaporator, thereby reducing system resistance to reduce power consumption and noise. It is about.

Preferred embodiments of the present invention are described in more detail with reference to the following drawings, whereby the features and advantages of the present invention will be more apparent, and

1A and 1B are front and side views respectively illustrating an indoor unit of a typical package air conditioner;

2A and 2B are front and side views respectively illustrating an indoor unit of a package air conditioner according to a first embodiment of the present invention;

3 is a cross-sectional view showing a part of a crossflow fan in an indoor unit of a package air conditioner according to a first embodiment of the present invention;

4 is a graph showing the relationship between power consumption and noise according to the installation state of the stabilizer in the indoor unit of the package air conditioner according to the first embodiment of the present invention;

5 is a graph comparing power consumption according to air volume of a package air conditioner according to a first embodiment of the present invention and a package air conditioner to which a conventional sirocco fan is applied;

6 is a graph comparing system resistance of a package air conditioner according to a first embodiment of the present invention and a package air conditioner to which a conventional sirocco fan is applied;

7 is a side view showing an indoor unit of a package air conditioner according to a second embodiment of the present invention;

8 is a side view illustrating an indoor unit of a package air conditioner according to a third exemplary embodiment of the present invention.

Best Mode for Carrying Out the Invention or Mode for Carrying Out the Invention

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 is used for the same configuration and additional description thereof is omitted below.

Prior to the description, the indoor unit of the package air conditioner according to the present invention can be variously implemented according to the arrangement of the crossflow fan, and among them, three exemplary embodiments are divided and described.

[First Embodiment]

First, FIGS. 2A and 2B are front and side views illustrating an indoor unit of a package air conditioner according to a first embodiment of the present invention, respectively.

2A and 2B, the indoor unit of the package air conditioner according to the first embodiment of the present invention is provided with an inlet grill 102 at the bottom and an outlet grill 103 at the top. A case 101, an evaporator 104 inclined above the inside of the case to cool the indoor air as heat of vaporization of the refrigerant, and a cross provided under the inside of the cabinet to forcibly suck the indoor air and discharge it to the evaporator side. It consists of a flow fan 110.

At this time, the indoor unit of the package air conditioner is a three-sided suction method in which the suction grill 102 is provided on both the front and both side edges of the case 101, the suction grill shown in Figure 1b is formed on one side edge.

And the evaporator 104 is connected to the condenser and compressor of the outdoor unit and the refrigerant pipe to form a refrigeration cycle, the upper end of the case 101 is fixed to the front of the case by being inclined naturally.

The bottom of the evaporator 104 is provided with a drain pan 105 for collecting a large amount of condensate generated on the surface of the evaporator while the air is cooled, and connected to a separate drain pipe at the bottom of the drain pan. The condensate outlet 105a is formed.

The crossflow fan 110 has an impeller 111 axially coupled to the motor 120 to cause air flow, a fan housing 112 disposed outside the impeller to form an air flow path, and the fan housing. It is composed of a stabilizer (stabilizer 115) provided on one side along the longitudinal direction of the impeller to form an interface between the intake air and the discharge air. At this time, the impeller 111 is divided into multiple stages by the boundary plate, each stage is composed of a plurality of blades curved in the rotation direction. The fan housing 112 includes a rear guide 113 having a predetermined curvature to form a discharge passage of the intake air. In addition, a gap portion 114 having the shortest distance to the impeller 111 is formed on one side of the rear guide 113 to form a boundary between the intake air and the discharge air together with the stabilizer 115.

The crossflow fan 110 configured as described above does not have a suction flow in the axial direction, but intake and discharge of air occur in a plane perpendicular to the axis of the impeller 111. The crossflow fan 11 is not only capable of producing a fixed pressure large air flow in general, but also generates an even flow in the axial direction, and is suitable for an air conditioner or the like. By the way, although the crossflow fan has the advantages described above, there is no example applied only to the window air conditioner, but also to the package air conditioner. This is because the airflow characteristics of the crossflow fan are not suitable for the indoor unit of the package air conditioner where there is a considerable distance between the suction grill and the discharge grill. Therefore, if the crossflow fan is incorrectly placed in the indoor unit of the package air conditioner, the system resistance increases, causing more power consumption and noise than the sirocco fan.

In view of this point, the present invention can solve the above-mentioned problems and arrange the characteristics of the crossflow fan by arranging the crossflow fan 11 to minimize the system resistance.

In the indoor unit of the package air conditioner according to the first embodiment of the present invention, the crossflow fan 110 is disposed such that the suction air sucked through the suction grill 102 and the discharged air discharged to the evaporator 104 coexist on the same height. do. That is, the suction flow path of the indoor air sucked into the crossflow fan 110 through the suction grill 102 and the discharge flow path discharged from the crossflow fan to the evaporator 104 side are left and right relative to the upper end of the crossflow fan. Backstroke side by side. Therefore, the crossflow fan 110 has a flow path structure capable of inhaling indoor air using the upper space thereof and then discharging it to the evaporator 104 side. At this time, a separator (106) for partitioning the upper space of the crossflow fan 110 should be further provided so that the intake air and the discharge air do not interfere with each other.

In order for the crossflow fan 110 to have the above-described flow path structure, the impeller 111 is positioned at the rear of the suction grill 102 so that its axial direction is parallel to the transverse direction of the case 101, and the rear guide ( 113 is located across the inside of the cabinet at the bottom of the impeller, the stabilizer 115 is located on the upper one side of the impeller.

At this time, the position of the gap portion 114 and the stabilizer 115 formed in the rear guide serves as an important factor for determining the crossflow fan 110 flow path structure. This is because the suction and discharge directions of the air are determined by the positions of the gap portion 114 and the stabilizer 115. That is, a low pressure part for inhaling air and a high pressure part for discharging air are formed on both sides of the virtual line L connecting the gap part and the stabilizer according to the rotation direction of the impeller 111. On the other hand, it is preferable to have a structure in which the suction flow path toward the crossflow fan 110 and the discharge flow path toward the evaporator 104 gradually diffuse.

To this end, the gap portion 114 of the rear guide in the crossflow fan according to the present invention is located in front of the virtual vertical line (Y) passing through the axis of rotation of the impeller 111, the stabilizer 115 is It is located behind the vertical line.

Therefore, assuming that the impeller 111 rotates in a counterclockwise direction, a low pressure portion is formed in front of the virtual line L connecting the gap portion 114 and the stabilizer 115, and a high pressure portion is formed at the rear thereof. Therefore, the indoor air sucked through the suction grill 102 may be naturally discharged to the evaporator 104 side. In addition, the suction passage in front of the stabilizer 115 and the discharge passage in the rear thereof may be gradually diffused along the advancing direction of the air.

On the other hand, the stabilizer 115 is one of the important factors that determine the flow characteristics of the crossflow fan. That is, the air flow rate, power consumption, and noise of the crossflow fan are greatly influenced by the position and the degree of inclination of the stabilizer. Therefore, in the indoor unit of the package air conditioner according to the first embodiment of the present invention, by specifying the position and the degree of inclination of the stabilizer, it provides the most advantageous advantages in terms of air volume, power consumption, and noise.

First, Figure 3 is a cross-sectional view showing a part of the crossflow fan of the indoor unit of the package air conditioner according to the first embodiment of the present invention, Figure 4 is the installation of the stabilizer in the indoor unit of the package air conditioner according to the first embodiment of the present invention It is a graph showing the relationship between power consumption and noise according to the state.

Referring to FIG. 3, several factors for determining the position and degree of inclination of the stabilizer are defined as follows.

The angle formed by the lower end of the stabilizer 115 and the imaginary vertical line Y passing through the rotation axis 0 of the impeller is called a setting angle, and when the setting angle is determined, the stabilizer itself moves to the suction grill side. The angle of inclination (to the right in the figure) is called the diffusing angle (β). At this time, the setting angle (α) determines the installation position of the stabilizer 115, the diffusion angle (β) is how much the flow path of the discharge air formed by the stabilizer and the rear guide 113 is diffused Will be decided.

Here, the present invention proposes a range of setting angles and diffusion angles of the stabilizer to enable the crossflow fan to achieve optimal performance. As shown in FIG. 3, the setting angle α determines the boundary between the suction channel (right side in the drawing) and the discharge channel (left side in the drawing) parallel to the left and right, and the setting angle is the suction channel according to the range. And the width of the discharge passage are determined. That is, if the setting angle α is too large, the suction passage is expanded while the discharge passage is narrowed. When the setting angle α is close to 0 ° (the stabilizer 115 adjusts the rotation axis 0 of the impeller). When installed on the extension line of the passing virtual vertical line Y), the discharge flow path is expanded while the suction flow path is narrowed so that the suction air can be subjected to considerable resistance. In view of this point, the present invention forms the suction flow path and the discharge flow path where the flow path resistance can be minimized by allowing the setting angle α to fall within the range of 20 ° to 60 °. On the other hand, when the setting angle is determined to be an appropriate value within the above-described range, the diffusion channel of the intake air and the diffusion channel of the discharged air are determined in parallel by the diffusion angle β. Here, the present invention suggests that the diffusion angle β falls within the range of 0 ° to 40 °. The diffusion angle β of 0 ° means that the stabilizer 115 is installed in parallel with an imaginary vertical line Y passing through the axis of rotation of the impeller, and the diffusion angle β has a certain value. As the 115 is inclined toward the suction grille, it means that the discharge passage and the suction passage are diffused along the advancing direction of the air.

Here, the present invention proposes a value that can achieve the best performance even within the given range of the setting angle and diffusion angle. First, it can be seen that the noise value compared to the same air volume becomes minimum when the setting angle α is 40 °, which is the middle value among the given ranges. Accordingly, when the setting angle α is 40 °, the air volume, power consumption, and noise value according to the change of the diffusion angle β are measured. The results are as follows.

α, β Flow rate (CMM) Rev. (rpm) Power (Watt) Noise (dBA) 40 °, 0 ° 17.2 977 95.2 55.3 15.0 858 71.4 52.5 14.0 807 64.0 52.1 10.6 633 43.1 42.9 40 °, 20 ° 17.7 940 100.9 55.7 15.0 808 74.3 52.1 14.0 752 66.9 49.9 10.6 613 44.4 42.2

On the other hand, Figure 4 shows the values shown in Table 1, the horizontal axis represents the air volume, the left vertical axis represents power consumption and the right vertical axis represents noise. And, the curve connected by the solid square point (■) shows the power consumption value when the setting angle (α) and the diffusion angle (β) are 40 ° and 0 °, respectively, and the curve connected by the solid rhombus point (◆) is set. The power consumption values are shown when the angle α and the diffusion angle β are 40 ° and 20 °, respectively. In addition, the curve connected by the hollow square point (□) shows the noise value when the setting angle (α) and the diffusion angle (β) are 40 ° and 0 °, respectively, and the curve connected by the hollow rhombus point (◇) indicates the setting angle (α). ) And noise at 40 ° and 20 ° respectively.

Referring to FIG. 4, it can be seen that when the diffusion angle β of the stabilizer is 0 °, the result is advantageous in terms of power consumption, and when the diffusion angle β of the stabilizer is 20 °, the result is advantageous in terms of noise. Can be. For example, the power consumption is 71.4 Watts when the airflow angle (β) of the stabilizer is 0 ° and the noise is 52.5 dBA at 15CMM, while the power consumption is 74.3 Watts when the diffusion angle (β) of the stabilizer is 20 °. The noise is 52.1 dBA. This means that the smaller the diffusion angle of the stabilizer at the same airflow, the lower the power consumption but the higher the noise. At this time, the reason why the noise is less generated when the diffusion angle β of the stabilizer is 20 ° is because the flow path of the discharge air formed by the stabilizer 115 and the rear guide 113 is naturally diffused to reduce the flow path resistance. Because.

Therefore, the diffusion angle of the stabilizer should be appropriately determined depending on whether the purpose is to reduce noise or to reduce power consumption.

Here, the present invention suggests that the diffusion angle β of the stabilizer is both 0 ° and 20 °. That is, the present invention can reduce the power consumption by installing the stabilizer 115 in parallel with the virtual vertical line (Y) passing through the axis of rotation (0) of the impeller, and also inclined the stabilizer by a predetermined angle to the suction grill side By installing it, the generation of noise can be suppressed as much as possible.

Meanwhile, as shown in FIG. 2B, a separator 106 is provided on the top of the stabilizer 115 to prevent the intake air and the discharge air from interfering with each other. The separator 106 is a plate-shaped member that divides the space between the lower end of the evaporator 104 from the upper end of the stabilizer 115 to the left and right. At this time, the separator 106 is preferably installed obliquely toward the suction grill 1023 side from the lower end to the upper end. This is because the flow paths of the intake air and the discharge air are formed along the separator 106, and it is preferable that the flow paths have a structure in which the flow paths diffuse along the air.

Here, the separator 106 is most preferably inclined at the same angle as the diffusion angle β of the stabilizer. Because, when the separator 106 is inclined at the same angle as the diffusion angle β of the stabilizer, the interface between the intake air and the discharge air formed by the separator 106 and the stabilizer 115 is formed smoothly, and the air travels. This is because it works in favor of.

On the other hand, the separator 106 may be installed from the top of the stabilizer 115 to the drain pan 105 at the bottom of the evaporator, or may be installed from the top of the stabilizer to the top of the suction grill 102. Even in this case, since the separator 106 is naturally inclined, the intake air and the discharge air may not only be partitioned from each other but may also have a flow path that spreads along the traveling direction.

On the other hand, in the indoor unit of the package air conditioner according to the first embodiment of the present invention, the installation height of the crossflow fan 110 depends on the distance between the evaporator 104 and the crossflow fan. That is, when the evaporator 104 and the crossflow fan 110 are too close, the evaporator itself may act as a large flow path resistance, so that the cross is positioned at a position where a sufficient distance can be secured between them in consideration of the advantage. The flow fan must be installed. In this case, the suction grill 102 does not need to be provided to the lower end of the case 101. The actual suction air is sucked into the impeller 111 through the upper region of the rear guide 113, and the lower end of the suction grill 102 to the height of the rear guide 113 is formed It is enough to be located.

Hereinafter, comparing the performance of the indoor unit of the package air conditioner according to the first embodiment of the present invention and the conventional indoor unit to which the sirocco fan is applied as shown in Table 2 below.

Type Flow rate (CMM) Rev. (rpm) Power (Watt) Sirocco fan 18.9 561 151.0 15.2 461 121.9 12.5 383 105.5 Crossflow fan 17.7 940 100.9 15.0 808 74.3 14.0 752 66.9 10.6 613 44.4

The values shown in Table 2 have been tested by replacing Sirocco fans and crossflow fans that produce similar airflows under different conditions of the system. At this time. As described above, the crossflow fan sets the setting angle and the diffusion angle of the stabilizer to 40 ° and 20 °, respectively, and the separator is inclined at the same angle as the diffusion angle of the stabilizer.

On the other hand, Figure 5 is a graph comparing the power consumption according to the air volume of the package air conditioner according to the first embodiment of the present invention and the package air conditioner to which the conventional sirocco fan, based on the data in Table 2. At this time, the horizontal axis of Figure 5 represents the air volume, the vertical axis represents the power consumption, the curve connected by a solid square point (■) represents the power consumption curve of the sirocco fan and the curve connected by a solid rhombus point (◆) is the crossflow fan The power consumption curve is shown.

Referring to Table 2 and Figure 5, it can be seen that the indoor unit of the package air conditioner according to the present invention is much more advantageous in terms of power consumption than the conventional indoor unit. In one example, the sirocco fan consumes 121.9 Watts of power to produce 15.2 CMM of air, whereas the crossflow fan of the present invention only consumes 74.3 Watts of power to produce 15.0 CMM of air. This means that the indoor unit of the package air conditioner according to the present invention can produce the same amount of air as the conventional electric power only by 60% of the power consumed by the conventional indoor unit using the sirocco fan. In other words, if the indoor unit of the package air conditioner according to the present invention consumes the same power as in the prior art, it means that the cooling efficiency can be considerably increased by producing a great amount of air volume.

This result is due to the result of applying the crossflow fan having a more improved flow path structure to the indoor unit of the package air conditioner as described above, thereby reducing the system resistance.

6 is a graph comparing the system resistance of a package air conditioner according to a first embodiment of the present invention and a package air conditioner using a conventional sirocco fan, in which the horizontal axis represents air volume and the vertical axis represents static pressure. In this case, the 'a' curve shown in the graph represents the change in the static pressure versus the air volume in the package air conditioner to which the sirocco fan is applied, and the 'b' curve represents the change in the static pressure to the air volume in the package air conditioner to which the crossflow fan is applied. The 'c' curve represents the change in static pressure versus airflow of the crossflow fan separated from the system. In other words, the 'a' curve represents the system resistance of the package air conditioner using the sirocco fan, the 'b' curve represents the system resistance of the package air conditioner to which the crossflow fan is applied, and the 'c' curve represents the crossflow. The fan's individual performance curve is shown.

At this time, the point where the 'c' curve meets the 'a' curve and the 'b' curve becomes an operating point, respectively. That is, the point where the 'c' curve meets the 'a' curve is a functioning point (0 _s ) of the package air conditioner using the sirocco fan, and the point where the 'c' curve meets the 'b' curve is the package to which the crossflow fan is applied. It is the operating point (0 _c ) of the air conditioner.

As shown in FIG. 6, it can be seen that the system resistance curve of the package air conditioner with crossflow fan is gentler than that with the sirocco fan, and this indicates that the package air conditioner according to the present invention produces more air volume than before under the same static pressure. It means you can. On the other hand, comparing the operating points ((0 _s , 0 _c ) of both resistance curves, it can be seen that the package air conditioner with a crossflow fan has a lower static pressure, although the air volume is larger than that of the package air conditioner with a sirocco fan. Therefore, in the case of the package air conditioner according to the present invention, the power consumption is greatly reduced.

So far, the power consumption of the package air conditioner according to the first embodiment of the present invention is significantly reduced than before, using various experimental data. On the other hand, although the data comparing the noise of the package air conditioner according to the first embodiment of the present invention and the conventional package air conditioner is not presented, in the present invention to which a crossflow fan having a more improved flow path structure is applied to the air flow path resistance It will be understood by those skilled in the art that the noise level is also significantly reduced.

On the other hand, as the crossflow fan 110 is applied to the indoor unit of the package air conditioner according to the first embodiment of the present invention, the design of the entire system can be designed in various ways. That is, due to the relationship that the impeller 111 of the crossflow fan is installed along the transverse direction of the case 101, the width of the system can be reduced by reducing the diameter of the impeller, thereby making it possible to reduce the thickness. Of course, in this case, the air volume may be reduced as the diameter of the impeller 111 is reduced. However, if the length of the impeller is sufficiently secured, the desired air volume may be obtained.

Second Embodiment

First, Figure 7 is a side view showing the indoor unit of the package air conditioner according to a second embodiment of the present invention.

As shown in FIG. 7, the indoor unit of the package air conditioner according to the second embodiment of the present invention includes a case having an inlet grill 202 at a lower end thereof and an outlet grill 203 provided at an upper end thereof. 201), an evaporator 204 which is inclined inside the case located behind the suction grill and cools the indoor air as heat of vaporization of the refrigerant, and is provided between the evaporator and the discharge grill to forcibly suck air from the bottom. Afterwards is composed of a crossflow fan 210 to discharge to the top.

In this case, the indoor unit of the package air conditioner is a three-sided suction method in which the suction grill 202 is provided at both the front and both side edges of the case 201, and the suction grill shown in FIG.

And the evaporator 204 is connected to the condenser and compressor of the outdoor unit and the refrigerant tube to form a refrigeration cycle, the upper end of which is naturally inclined by being fixed to the front of the case 201 and the lower end of the case.

The lower end of the evaporator 204 is provided with a drain pan (205) for collecting a large amount of condensate generated on the surface of the evaporator while the air is cooled, connected to a separate drain pipe at the bottom of the drain pan The condensate outlet 205a is formed.

At this time, due to the relationship between the crossflow fan 210 and the evaporator 201 and the discharge grill 203, the low pressure part of the crossflow fan should be formed at the bottom, and the high pressure part should be formed at the top. To this end, the crossflow fan 210 has an impeller 211 positioned horizontally between the evaporator and the discharge grill, and a rear guide positioned at the rear of the impeller to have a predetermined curvature so as to form a discharge path of the intake air. 213 and a stabilizer 215 which forms an interface between the intake air and the discharge air and is located above the impeller.

In the crossflow fan 210, in order to form the high pressure portion and the low pressure portion at the position as described above, the stabilizer 215 should be located in the upper front with respect to the axis of rotation of the impeller 211, The gap portion 214 should be located at the rear lower portion about the axis of rotation of the impeller. At this time, the position and the degree of inclination of the stabilizer 215 is determined by the appropriate setting angle and diffusion angle as described above.

Therefore, assuming that the impeller 211 rotates in a counterclockwise direction, a low pressure portion is formed at a lower portion of the virtual line L connecting the stabilizer 215 and the rear guide gap portion 214, and a high pressure portion is formed thereon. Can be formed.

Of course, in this case, the intake air and the discharge air are clearly distinguished from the crossflow fan 210, and a separate separator for arbitrarily separating them is not necessary.

Hereinafter, the indoor unit of the package air conditioner according to the second embodiment of the present invention and the indoor unit of the package air conditioner to which the conventional sirocco fan is applied in terms of power consumption are as follows.

Type Flow rate (CMM) Rev. (rpm) Power (Watt) Sirocco fan 18.9 561 151.0 15.2 461 121.9 12.5 383 105.5 Crossflow fan 11.3 1013 94.2 10.6 932 77.1

The data in Table 3 are numerical values obtained by applying the crossflow fan and the conventional sirocco fan according to the second embodiment of the present invention while all other conditions of the system are the same.

According to Table 3, in the case of the crossflow fan according to the second embodiment of the present invention, the rotational speed is too high to produce the same air volume as the sirocco fan, but it can be seen that a considerable portion is reduced in terms of power consumption. As an example, the crossflow fan according to the second embodiment of the present invention consumes 94.2 Watt of power to produce 11.3 CMM of air, whereas the conventional sirocco fan uses 105.5 Watt of power to produce 12.5 CMM of air. To consume. Although it is not possible to compare the power consumption of both at the same air flow rate, the crossflow fan according to the second embodiment of the present invention can produce a similar air flow amount with less power consumption than the sirocco fan.

On the other hand, in the indoor unit of the package air conditioner according to the second embodiment of the present invention, the air flow is small, the distance between the crossflow fan 210 and the evaporator 204 is close to the crossflow fan itself is the flow resistance of the intake air Because it works. In consideration of this point, if the installation height of the crossflow fan is appropriate, a sufficient amount of air can be produced with low power consumption.

Third Embodiment

First, Figure 8 is a side view showing the indoor unit of the package air conditioner according to a third embodiment of the present invention.

As shown in FIG. 8, the indoor unit of the package air conditioner according to the third embodiment of the present invention includes a case having an inlet grill 3102 at a lower end thereof and an outlet grill 303 provided at an upper end thereof. 301, an evaporator 304 inclined inside the case located at the rear of the suction grill, for cooling the indoor air as heat of vaporization of the refrigerant, and provided to the rear of the discharge grill to forcibly suck air from the lower part. And a crossflow fan 310 for discharging to the side opposite to the discharge grill.

In this case, the indoor unit of the package air conditioner is a three-sided suction method in which the suction grill 302 is provided at both the front and both side edges of the case 301, and the suction grill shown in FIG. 8 is formed at one side edge.

The mall evaporator 304 is connected to the condenser and the compressor of the outdoor unit by a refrigerant pipe to form a refrigeration cycle, and the upper end is naturally inclined by being fixed to the front of the case 301 and the lower end to the rear of the case.

The bottom of the evaporator 304 is provided with a drain pan (305) for collecting a large amount of condensate generated on the surface of the evaporator while the air is cooled, and connected to a separate drain pipe at the bottom of the drain pan The condensate outlet 305a is formed.

At this time, due to the relationship that the crossflow fan 310 is located behind the discharge grill 303, the low pressure portion of the crossflow fan should be formed at the lower portion, and the high pressure portion should be formed at the side opposite to the discharge grill. do. To this end, the crossflow fan 310 has an impeller 311 positioned laterally behind the discharge grill 303, and has a predetermined curvature so as to form a discharge path of the intake air, and discharge grill along the rear of the impeller. The rear guide 313 positioned up to the side, and the stabilizer 315 is formed on the upper part of the impeller to form an interface between the intake air and the discharge air.

In the crossflow fan 310, in order to form the high pressure portion and the low pressure portion at the position as described above, the stabilizer 315 should be located at the front upper part about the axis of rotation of the impeller 311, The gap portion 314 should be located at the rear lower part about the axis of rotation of the impeller. At this time, the stabilizer 315 is most preferably located at a height parallel to the lower end of the discharge grill (303). On the other hand, the position and the degree of inclination of the stabilizer 315 is determined by the appropriate setting angle and diffusion angle as described above.

Therefore, assuming that the impeller 311 rotates in the counterclockwise direction, a low pressure portion is formed at a lower portion of the lower portion of the lower portion of the virtual line L connecting the stabilizer 315 and the gap portion 314 of the rear guide. The high pressure portion may be formed.

Of course, in this case, the intake air and the discharge air are clearly distinguished from the crossflow fan 310, and a separate separator is not required to separate them arbitrarily.

Hereinafter, the indoor unit of the package air conditioner according to the third embodiment of the present invention and the indoor unit of the package air conditioner to which the conventional sirocco fan is applied in terms of power consumption are as follows.

Type Flow rate (CMM) Rev. (rpm) Power (Watt) Sirocco fan 18.9 561 151.0 15.2 461 121.9 12.5 383 105.5 Crossflow fan 15.5 910 103.1 14.0 825 82.4

The data in Table 4 are numerical values obtained by applying each of the crossflow fan and the conventional sirocco fan according to the third embodiment of the present invention while all other conditions of the system are the same.

According to Table 4, in the case of the crossflow fan according to the third embodiment of the present invention, it can be seen that much less power consumption is required to produce the same air volume than the conventional sirocco fan. As an example, the crossflow fan according to the third embodiment of the present invention consumes 103.1 Watts of power to produce 15.5 CMM of air volume, whereas the conventional sirocco fan consumes 121.9 Watts of power to produce 15.2 CMM of air. To consume. Although it is not possible to compare the power consumption of both at the same airflow, the crossflow fan according to the third embodiment of the present invention can produce a similar airflow at a much lower power consumption than the sirocco fan. In other words, the package air conditioner according to the third exemplary embodiment of the present invention can further improve the cooling efficiency by producing much more air volume with power consumption as in the prior art.

The indoor unit of the package air conditioner according to the preferred embodiment of the present invention has been described in detail with reference to the accompanying drawings. The three embodiments described above all apply the crossflow fan as the blower provided in the indoor unit of the package air conditioner and arrange the crossflow fan to minimize the system resistance. Accordingly, although the indoor unit of the package air conditioner according to the embodiment has a difference in degree, it provides an advantage of reducing power consumption and noise, and thinning the entire system using the characteristics of the crossflow fan itself. To provide.

Hereinafter, when the indoor unit of the package air conditioner according to an embodiment of the present invention is compared with each other in terms of air volume, power consumption, and noise, the present invention is as follows.

Type Flow rate (CMM) Rev. (rpm) Noise (dBA) Power (Watt) A 15.0 808 52.1 74.3 14.0 752 49.9 66.9 B 11.3 1013 55.7 94.2 10.6 932 53.8 77.1 C 15.5 910 59.5 103.1 14.0 825 56.6 82.4

In Table 5, the form A is the indoor unit of the package air conditioner according to the first embodiment of the present invention, the form B is according to the second embodiment of the present invention, and the form C is according to the third embodiment of the present invention. . At this time, the data presented for each item are all measured in a state in which the crossflow fan and the evaporator are disposed in each case in the case of the same size.

According to Table 5, although three types cannot be prepared at the same amount of air due to the inability to produce the same amount of air in the form of type A or C, in the case of type B, the three types can be prepared at the same amount of air based on approximately the same amount of air. Although it is not possible to prepare, it can be seen that A type is advantageous in terms of power consumption and noise compared to other types when the three types are compared based on approximately similar air flows. For example, type A consumes 66.9 Watts of power to produce 14.0 CMM of air and produces 49.9 dBA, while type B consumes 94.2 Watts of power to produce 11.3 CMM of air and 55.7 dBA. In the case of the C type, it produces 82.4 Watts of power and produces 56.6 dBA of noise.

Based on these results, the indoor unit of the package air conditioner according to the present invention is most advantageous in terms of power consumption and noise in the first embodiment, and next in the third embodiment. Of course, all three types described above are far more advantageous in terms of power consumption and noise than the conventional sirocco fan, which has already been described above.

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.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to apply a crossflow fan as a blower for forcibly sucking indoor air and discharging it to an evaporator, and by appropriately arranging the crossflow fan, reducing system resistance and consumption It is to provide indoor unit of package air conditioner which can reduce power and noise together.

Another object of the present invention is to provide an indoor unit of a package air conditioner having a thinned size by applying a crossflow fan to a blower.

In order to achieve the above object, the indoor unit of the package air conditioner of one embodiment of the present invention is formed in the upper and lower discharge grill (inlet grill) and the inlet grill (inlet grill), the cabinet to form a circulation space of the indoor air, and An evaporator provided at an upper side of the cabinet to be inclined to cool the indoor air by the heat of vaporization of the refrigerant, and an inside evaporator provided at the lower side of the cabinet to forcibly suck the indoor air through the suction grill, and discharge the indoor air to the evaporator side. A crossflow fan in which the intake air and the discharge air directed toward the evaporator side coexist on the same height, and a separator provided at an upper portion of the crossflow fan to prevent interference between the intake air and the discharge air. It is configured by.

And the indoor unit of the package air conditioner according to another aspect of the present invention is provided with a discharge grill and a suction grill is formed in the upper and lower ends to form a circulating space of the indoor air, and the inclined inside the cabinet located behind the suction grill. A cross flow provided between an evaporator for cooling indoor air by the heat of vaporization of a refrigerant, a low pressure part provided between the evaporator and a discharge grill, and a high pressure part formed at a lower part to suck air passing through the evaporator, and a high pressure part disposed at an upper part to discharge the air It is configured to include a fan.

Finally, the indoor unit of the package air conditioner according to another embodiment of the present invention is formed in the upper and lower end discharge grill and the suction grill is formed in the cabinet to form a circulation space of the indoor air, and inclined inside the cabinet located behind the suction grill And an evaporator for cooling the indoor air by the heat of vaporization of the refrigerant, and a low pressure part provided inside the cabinet positioned at the rear of the discharge grill and having suctioned air passing through the evaporator at a lower portion of the discharge grill. It is configured to include a crossflow fan is formed with a high-pressure section for discharging air to the side.

Therefore, the indoor unit of the package air conditioner according to the present invention by arranging a crossflow fan capable of producing a fixed pressure large air flow as a blower to minimize the system resistance, thereby providing an effect of reducing power consumption and significantly reducing noise due to air flow. do. In addition, the indoor unit of the package air conditioner according to the present invention provides an effect that can be reduced in size when the impeller is installed in the transverse direction of the case due to the characteristics of the crossflow fan.

The indoor unit of the package air conditioner according to the present invention applies a crossflow fan as a blower which forcibly sucks indoor air and discharges it to the evaporator side, and arranges it to minimize system resistance, thereby producing more air volume and reducing power consumption. It offers the advantage of significantly reducing noise.

In addition, the indoor unit of the package air conditioner according to the present invention provides an advantage that the design of the system can be variously designed such that the overall size can be reduced by applying a crossflow fan as a blower.

Claims (18)

A cabinet configured to form a circulating space of indoor air by forming an outlet grill and an inlet grill at upper and lower ends, respectively; An evaporator (evaporaotr) provided at an inclined upper side of the cabinet and cooling indoor air by heat of vaporization of a refrigerant; Crossflow fan provided in the lower side of the cabinet and forced to suck the indoor air through the suction grill to discharge to the evaporator side, the air flow to the side and the suction air through the suction grill coexist on the same height (crossflow fan) ; An indoor unit of a package air conditioner including a separator provided between an upper portion of the crossflow fan and an evaporator to prevent interference between intake air and discharge air. The method of claim 1, The crossflow fan is An impeller positioned laterally at a predetermined height behind the suction grill, A rear guide positioned at a lower portion of the impeller and having a predetermined curvature to form a discharge path of the sucked indoor air; The air conditioner indoor unit of the package further comprising a stabilizer positioned between an upper part of the impeller and a separator and forming an interface between the air sucked into the impeller and the air discharged from the impeller. The method of claim 2, An indoor unit of a package air conditioner, wherein a stabilizer is positioned at a rear of the virtual vertical line passing through the rotation axis of the impeller, and a gap portion of the rear guide having a shortest distance to the impeller is located at the front thereof. The method of claim 3, wherein The crossflow fan is a room air conditioner of a package air conditioner having a low pressure part in which indoor air is sucked in front of a virtual line connecting a gap portion of a rear guide and a stabilizer, and a high pressure part in which an indoor air is directed toward an evaporator. The method of claim 3, wherein An indoor unit of a package air conditioner having a setting angle formed by a virtual vertical line passing through a lower end of the stabilizer and an axis of rotation of the impeller. The method of claim 5, wherein An indoor unit of a package air conditioner, wherein the setting angle of the stabilizer is 40 °. The method of claim 5, wherein An indoor unit of a package air conditioner in which a diffusing angle in which the stabilizer is inclined toward the suction grill is in a range of 0 ° to 40 °. The method of claim 7, wherein An indoor unit of a package air conditioner having a diffusion angle of the stabilizer of 20 °. The method of claim 7, wherein The indoor unit of the package air conditioner, the separator is inclined at the same angle as the diffusion angle of the stabilizer to form a diffusion flow path of the discharged air. The method of claim 2, The separator is an indoor unit of the package air conditioner is installed inclined from the top of the stabilizer to the drain pan of the bottom of the evaporator. The method of claim 2, The separator is an indoor unit of the package air conditioner is installed inclined from the top of the stabilizer to the top of the suction grill. The method of claim 1, The suction grill is an indoor unit of a package air conditioner, the lower end of which is positioned to a height at which a rear guide of a crossflow fan is formed. Cabinets for discharging grill and suction grill are formed in the upper and lower ends to form a circulation space of the indoor air; An evaporator provided at an inclined upper side of the cabinet and cooling indoor air by heat of vaporization of a refrigerant; A crossflow fan provided inside the cabinet and forcibly sucking indoor air through a suction grill and discharging the indoor air to an evaporator; The crossflow fan includes an impeller positioned at a predetermined rear height of the suction grill, a rear guide having a predetermined curvature so as to form a discharge path of the suctioned indoor air located across the inside of the cabinet at a lower portion of the impeller, and the impeller The indoor unit of the package air conditioner, characterized in that it comprises a stabilizer is located at the upper portion of the front and rear walls of the cabinet. Cabinets for discharging grill and suction grill are formed in the upper and lower ends to form a circulation space of the indoor air; An evaporator provided at an inclined upper side of the cabinet and cooling indoor air by heat of vaporization of a refrigerant; A crossflow fan provided inside the cabinet and forcibly sucking indoor air through a suction grill and discharging the indoor air to an evaporator; A suction flow path formed inside the cabinet and allowing indoor air to flow into the crossflow fan through the suction grill; A discharge passage formed in the cabinet and configured to discharge air from the crossflow fan to the evaporator; The indoor unit of the package air conditioner, characterized in that configured to be arranged in parallel with the suction passage and the discharge passage. Cabinets for discharging grill and suction grill are formed in the upper and lower ends to form a circulation space of the indoor air; An evaporator provided inclined in the cabinet positioned at the rear of the suction grill and cooling the indoor air by the heat of vaporization of the refrigerant; An indoor unit of a package air conditioner including a crossflow fan provided between the evaporator and the discharge grill and having a low pressure portion through which an air passing through the evaporator is sucked, and a high pressure unit configured to discharge air toward the discharge grill. The method of claim 15, The crossflow fan is An impeller positioned transversely between the evaporator and the discharge grill, A rear guide having a predetermined curvature along the rear of the impeller so as to form a discharge path of the indoor air sucked from the gap portion located at the rear lower portion of the impeller; The indoor unit of the package air conditioner further comprises a stabilizer positioned on the front upper portion of the impeller and forming an interface between intake air and discharge air. Cabinets for discharging grill and suction grill are formed in the upper and lower ends to form a circulation space of the indoor air; An evaporator provided inclined in the cabinet positioned at the rear of the suction grill and cooling the indoor air by the heat of vaporization of the refrigerant; And a crossflow fan provided inside the cabinet positioned at the rear of the discharge grill, and having a low pressure portion for sucking air passing through the evaporator under the discharge grill, and a high pressure portion for discharging air toward the discharge grill at the rear of the discharge grill. Indoor unit of package air conditioning. The method of claim 17, The crossflow fan is An impeller positioned laterally behind the discharge grill; A rear guide having a predetermined curvature along the rear of the impeller so as to form a discharge path of the indoor air sucked from the gap portion located at the rear lower portion of the impeller; An indoor unit of a packaged air conditioner including a stabilizer positioned in front of the impeller and forming a boundary between an intake air and an discharge air.