WO2014207909A1

WO2014207909A1 - Air conditioner

Info

Publication number: WO2014207909A1
Application number: PCT/JP2013/067850
Authority: WO
Inventors: 惇司河野; 池田　尚史; 昌彦高木; 栗原　誠
Original assignee: 三菱電機株式会社
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2014-12-31
Also published as: EP3015774A4; JPWO2014207909A1; EP3015774B1; JP6104384B2; EP3015774A1

Abstract

　An air conditioner provided with: a main body having at least one inlet and at least one outlet; and a heat exchanger (3) disposed on a flow path of air taken into the main body through the inlet and discharged into a space to be air-conditioned through the outlet. The outlet (9) is located, in plan view, between the heat exchanger (3) and a side plate (4) of the main body. The outlet is formed by an inside wind path wall (10) on the heat-exchanger side, an outside wind path wall (11) on the side towards the side plate of the main body, and a pair of side walls (12). The length (L2) of the inside wind path wall is greater than the length (L1) of the outside wind path wall.

Description

Air conditioner

The present invention relates to an air conditioner.

As a conventional ceiling-embedded air conditioner, for example, there is one disclosed in Patent Document 1. This air conditioner has a partition at the longitudinal end of the main body outlet, and further has a guide wall that guides the air blown from the heat exchanger to the outlet so as to be connected to the partition. And it is intended that the partition part and the guide wall part lead the air flowing out from the corner part of the heat exchanger to the air outlet suitably.

Japanese Patent Laying-Open No. 2005-069586 (Section 9, FIG. 2)

In the air outlet of a conventional ceiling-embedded air conditioner, when the air that has passed through the heat exchanger flows into the air outlet, the air flow is easily separated at the inlet of the air outlet, and in particular, the blower side of the main body air outlet There is a high possibility that the air current will peel off at the corner of the outlet where the air passage wall and the side wall of the longitudinal end of the outlet are connected. Then, such separation of the airflow is a cause of ventilation resistance of the air outlet air passage. Furthermore, since the wind speed is low on the downstream side of the separation region, there is a problem that the wind direction plate installed at the air outlet tends to condense due to the entrainment of room air during the cooling operation.

Further, in the air conditioner disclosed in Patent Document 1 described above, the air outlet area is narrowed by the guide wall portion, so that the air flow resistance of the air outlet increases, resulting in problems such as a reduction in air volume and an increase in noise.

This invention was made in order to solve the said subject, and it aims at providing the air conditioner which can prevent generation | occurrence | production of peeling, ensuring sufficient area in a blower outlet.

In order to achieve the above-described object, an air conditioner according to the present invention includes a main body having at least one suction port and at least one air outlet at a lower portion, the main body housed in the main body, and from the suction port into the main body. A blower that creates a flow of air that is sucked into the target space and is blown into the target space, and is housed in the main body, and is sucked into the main body from the suction port to the target space. A heat exchanger disposed in a flow path of air to be blown out, and the air outlet is between the heat exchanger and a side plate of the main body in plan view, and the air outlet is the heat exchanger. It is formed by an inner air passage wall that is the exchanger side, an outer air passage wall that is the side plate side of the main body, and a pair of side walls that connect between both ends of the inner air passage wall and both ends of the outer air passage wall. The length L2 of the inner air passage wall is equal to the length of the outer air passage wall. Greater than 1.
The main body may be formed in a polygonal shape in plan view, and the air outlet may be arranged along a corresponding side excluding a corner portion in the polygon.
Preferably, the portion on the inner air passage wall side of the air outlet is formed so that the air passage narrows toward the downstream.
Preferably, the pair of side walls in the air outlet is divided by a divided wall surface extending toward the longitudinal center of the air outlet. In that case, the divided wall surface is inclined such that the side wall side approaches the inner air passage wall with respect to a line BL extending in a direction parallel to the inner air passage wall and the outer air passage wall in plan view. May be.
Preferably, the length L2 of the inner air passage wall of the air outlet is set to be shorter than the length L3 of the straight portion extending in the longitudinal direction of the air outlet in the heat exchanger.

According to the air conditioner of the present invention, it is possible to prevent the occurrence of peeling while ensuring a sufficient area at the outlet.

It is the figure which showed the internal structure of the air conditioner which concerns on Embodiment 1 of this invention from the side. It is the figure which showed the blower outlet of the air conditioner concerning this Embodiment 1 from upper direction. It is a longitudinal cross-section of the blower outlet regarding Embodiment 2 of this invention. FIG. 4 is a perspective view of the air outlet according to the third embodiment of the present invention. FIG. 5 is a perspective view of a modified outlet according to the third embodiment of the present invention. It is a figure of the same aspect as FIG. 2 regarding Embodiment 4 of this invention.

Hereinafter, an embodiment of an air conditioner according to the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing the internal structure of the air conditioner according to Embodiment 1 of the present invention from the side. More specifically, the air conditioner according to Embodiment 1 is a so-called indoor unit of a packaged air conditioner. FIG. 1 shows that the main part of the air conditioner main body is embedded in the ceiling of the room, and the lower part of the main body is The state facing the room interior is shown.

At least one suction port and at least one air outlet are provided in the lower part of the main body. Inside the main body, the flow of air that is sucked into the main body from the air inlet and blown out from the air outlet to the target space. And a heat exchanger disposed in the air flow path. A specific example will be described in detail below.

The air conditioner that is embedded in the ceiling includes a turbo fan 1 as a blower, a heat exchanger 3, and at least one outlet 9. The main body is embedded on the back side (opposite the room) of the ceiling surface 15 of the room that is the target space.

As an example, in the first embodiment, the main body has a top plate 5 of the main body that is rectangular in plan view, and four side plates 4 of the main body that extend downward from four sides of the top plate 5 of the main body. In other words, the main body is a box body in which the upper end surface of the rectangular tube body including the side plates 4 of the four main bodies is closed by the top plate 5 of the main body.

The decorative panel 6 is detachably attached to the main body at the lower part of the main body, that is, at the open lower end surface of the box. As shown in FIG. 1, the top plate 5 of the main body is located above the ceiling surface 15, and the decorative panel 6 is located substantially on the same surface as the ceiling surface 15.

Near the center of the decorative panel 6, there is provided a suction grill 7 which is an air inlet to the main body. The suction grill 7 is provided with a filter 8 for removing dust after passing through the suction grill 7.

As an example, in the first embodiment, the decorative panel 6 and the suction grille 7 each have a rectangular outer edge in plan view.

A plurality of air outlets 9 are provided in an area between the outer edge of the decorative panel 6 and the outer edge of the suction grille 7. In the first embodiment, each of the decorative panel 6 and the suction grille 7 has four edges, and there are four air outlets 9, which are described later. The decorative panel 6 and the suction grille 7 are arranged along corresponding sides except for the corner portion. The four outlets 9 are positioned so as to surround the suction grille 7. Each air outlet 9 is provided with a wind direction plate 13 that adjusts the direction of air to be blown out.

The fan motor 2 is disposed in the center of the main body. The fan motor 2 is supported on the lower surface (the inner space side of the main body) of the top plate 5 of the main body. A turbo fan 1 is attached to a rotating shaft extending downward in the fan motor 2. Further, between the turbo fan 1 and the suction grill 7, a bell mouth 14 that forms a suction air path from the suction grill 7 toward the turbo fan 1 is provided. The turbofan 1 sucks air into the main body from the suction grill 7 and causes the air to flow out from the blowout port 9 into the room 17 that is the target space.

The heat exchanger 3 is disposed on the radially outer side of the turbofan 1. In other words, the heat exchanger 3 is arranged in a flow path of air generated in the main body by the turbofan 1 and performs heat exchange between the air and the refrigerant. Further, the heat exchanger 3 has at least one corner portion 16 (see FIG. 2 described later) at a portion facing each adjacent corner portion of each air outlet 9.

The heat exchanger 3 has a plurality of fins arranged at predetermined intervals in the horizontal direction, and a heat transfer pipe passing through the fins, and the heat transfer pipe is connected to a well-known outdoor unit (not shown) by a connection pipe. As a result, a cooled refrigerant or a heated refrigerant is supplied to the heat exchanger 3. In addition, the structure and aspect of the turbo fan 1, the bell mouth 14, and the heat exchanger 3 are not specifically limited, In this Embodiment 1, a well-known thing is used.

In such a configuration, when the turbo fan 1 rotates, the air in the room 17 is sucked into the suction grill 7 of the decorative panel 6. The air removed by the filter 8 is guided by the bell mouth 14 constituting the main body suction port and sucked into the turbofan 1. Furthermore, in the turbofan 1, the air sucked upward from below is blown out in the horizontal direction and in the outward direction in the radial direction. The air blown out in this way is subjected to heat exchange and humidity adjustment when passing through the heat exchanger 3, and then changed in the flow direction downward, and blown out from each of the outlets 9 into the room 17.

Next, details of the air outlet 9 will be described with reference to FIGS. 1 and 2. FIG. 2 is a view of one air outlet 9 relating to the first embodiment as viewed from above.

As shown in FIG. 1, the air outlet 9 is located between the heat exchanger 3 and the main body side plate 4 in a plan view. As shown in FIG. 2, the center side of the main body of the air outlet 9 is defined by the inner air passage wall 10 that is the heat exchanger side, and the outer edge side of the decorative panel 6 at the air outlet 9 is the side plate side of the main body. It is demarcated by a certain outer air passage wall 11, and both ends of the inner air passage wall 10 and both ends of the outer air passage wall 11 are connected by a pair of side walls 12. The airflow that has passed through the straight portion of the heat exchanger 3 flows into the air outlet 9 from the inner air passage wall 10 side, and the airflow that has passed through the corner portion 16 of the heat exchanger 3 is on the side wall 12 side of the adjacent air outlet 9. Flows into the air outlet 9. In the first embodiment, the inner air passage wall 10, the outer air passage wall 11, and the pair of side walls 12 extend along the flow direction, that is, the direction perpendicular to the paper surface of FIG. 2, and can be seen in FIG. The opening area / opening shape of the outlet 9 is maintained constant from the inlet end to the outlet end of the outlet 9.

In the first embodiment, the length L2 of the inner air passage wall 10 is longer than the length L1 of the outer air passage wall 11 (the dimension of the air passage wall extending in the longitudinal direction of the air outlet, the dimension along the side) L1. Is larger. This will be described in more detail. In the first embodiment, the inner air passage wall 10 and the outer air passage wall 11 appear as a straight line extending substantially in parallel in a plan view, that is, on the inlet side to the air outlet. A line passing through the center of the length direction of the inner air passage wall 10 and the outer air passage wall 11 and orthogonal to the extending direction of the inner air passage wall 10 and the outer air passage wall 11 is defined as a center line CL. When the vicinity of the center line CL is the center of the outlet, as described above, the length L1 of the outer air passage wall 11 <the length L2 of the inner air passage wall 10 is such that at least one of the side walls 12 is the inner air passage. This is accomplished by including a deflection that extends away from the center of the outlet as it approaches the wall 10. The configuration shown in FIG. 2 is an example in the case where both side walls 12 have a deflection portion as a part of the side walls 12.

Each of the pair of side walls 12 includes a straight portion 12a extending from the end on the outer air passage wall 11 side toward the inner air passage wall 10 and substantially parallel to the center line CL (the distance from the air outlet center is substantially constant), It consists of the inclination part 12b which comprises from the connection part of the straight part 12a to the edge part by the side of the inner side air channel wall 10. FIG. And this inclination part 12b is a deflection | deviation part, and the inclination part 12b inclines so that it may leave | separate from the blower outlet center as it approaches the inner side air channel wall 10, and is extended linearly.

FIG. 2 is merely an example for obtaining the length L1 of the outer air passage wall 11 <the length L2 of the inner air passage wall 10. Therefore, for example, the planed portion is realized as the inclined portion 12b itself by extending linearly so as to be separated from the center of the outlet as the entire inclined portion 12b approaches the inner air passage wall 10 in plan view. Or, in plan view, a part or all of the inclined portion 12b is curved, and the curved portion has a portion that moves away from the center of the outlet as it approaches the inner air passage wall 10. It may be realized with. Further, in this case, the curve may be a curve with a convex shape on the center side of the air outlet, or a curve with a concave shape on the center side of the air outlet.

Thus, since the length L1 of the outer air passage wall 11 <the length L2 of the inner air passage wall 10, the length of the air outlet 9 on the center side of the main body, that is, the length on the heat exchanger side is relatively It has been expanded. In other words, it can be considered that the air passages at the pair of corners where the inner air passage wall 10 and the pair of side walls 12 intersect at the air outlet 9 are relatively enlarged.

According to the air conditioner according to the first embodiment configured as described above, the corner on the heat exchanger side at the inlet of the outlet is relatively enlarged, so the corner of the heat exchanger is The airflow that has passed through can be more efficiently taken into the air outlet, and the separation of the airflow can be reduced without reducing the area of the air outlet. Moreover, since avoidance of the area reduction of the air outlet and reduction of air flow separation are compatible, it is possible to reduce the ventilation resistance, and thus reduce noise, sufficiently secure the flow rate, and save energy. Is possible. Furthermore, since the reduction in the area of the air outlet and the reduction in the separation of the airflow are compatible, it is possible to suppress the decrease in the wind speed, and as a result, the occurrence of the entrainment flow is also suppressed. Occurrence can be prevented.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a view showing a longitudinal section of the air outlet (a section taken along line III-III in FIG. 2, a section having the center line CL as a perpendicular line) in the second embodiment. The second embodiment is the same as the first embodiment described above except for the parts described below.

The air outlet 109 according to the second embodiment is formed such that the enlarged portion on the inner air passage wall 10 side is narrowed toward the downstream (lower side in FIG. 3). The area of the end (downstream end) 109a is configured to be smaller than the area of the inlet end (upstream end) 109b. The length L2 in the longitudinal direction of the inner air passage wall 10 of the air outlet 109 described above is a length secured in the vicinity of the inlet end 109b.

In the air conditioner according to the second embodiment configured as described above, the same advantages as those of the first embodiment are obtained. In addition, in Embodiment 2, since the air path of the air outlet becomes narrower toward the downstream side of the air outlet, the reattachment of the air current can be promoted, and the separation area of the air current downstream of the air outlet can be reduced. The wind speed on the inner wind passage wall side at the outlet end of the outlet can be increased. As a result, it is possible to further reduce pressure loss due to airflow separation, improve energy saving, reduce blowing noise, and prevent condensation due to entrainment of indoor air.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIGS. 4 and 5 are perspective views of the air outlet according to the third embodiment of the present invention. The third embodiment is the same as the second embodiment described above except for the parts described below.

The air outlet 209 of the third embodiment has a configuration in which the side wall 212 at the longitudinal end of the air outlet 209 is divided by a divided wall surface 218 extending toward the longitudinal center of the air outlet 209. More specifically, as shown in FIG. 4, in the portion on the downstream side of the divided wall surface 218 in the side wall 212, the direction is orthogonal to the inner air passage wall 10 and the outer air passage wall 11 and along the flow direction. The portion of the side wall 212 on the side of the outer air passage wall 11 with respect to the divided wall surface 218 is also perpendicular to the inner air passage wall 10 and the outer air passage wall 11 and along the flow direction. And has a straight portion 12a extending straight. On the other hand, the portion of the side wall 212 closer to the inner air passage wall 10 than the divided wall surface 218 is inclined sloped 212d so that the distance between the straight portion 12a and the straight portion 212c in the longitudinal direction increases as the distance from the inlet end 209b increases. have. In other words, the distance L in the longitudinal direction between the pair of left and right (only one is shown in FIG. 4) slopes 212d becomes narrower from the inlet end 209b toward the outlet end 209a, and the most downstream part of the slope 212d is the straight part 212c. Connect to.

In FIG. 4, the divided wall surface 218 extends in a direction orthogonal to the straight portion 12 a and the straight portion 212 c in plan view, that is, in a direction parallel to the inner air passage wall 10 and the outer air passage wall 11. Instead of this, a divided wall surface 218 ′ shown in FIG. 5 may be formed. FIG. 5 is a modified example of the third embodiment, and the divided wall surface 218 ′ has a side wall with respect to the line BL extending in a direction parallel to the inner air passage wall 10 and the outer air passage wall 11 in a plan view. The side 212 is inclined so as to approach the inner air passage wall 10. Therefore, the pair of inclined surfaces 212d ′ has a narrower distance L in the longitudinal direction from the inlet end 209b toward the outlet end 209a and a width perpendicular to the longitudinal direction (the distance between the inner air passage wall 10 and the outer air passage wall 11). The dimension (W in the facing direction) W is also narrowed.

Also in the air conditioner according to the third embodiment configured as described above, advantages similar to those of the first embodiment and further advantages similar to those of the second embodiment are obtained. In addition, in Embodiment 3, the longitudinal direction of the blowout port that is likely to be biased toward the outer air channel wall side of the blowout port by providing the side wall of the blowout port with a divided wall surface extending toward the central portion in the longitudinal direction. The airflow flowing in from the side wall, which is the end, can be sufficiently supplied also to the inner air passage wall side of the outlet. Therefore, compared with the aspect which does not have a division | segmentation wall surface, the air volume at the inner side air channel wall side of a blower outlet can be increased, and peeling of an airflow can be suppressed. This also makes it possible to reduce pressure loss due to airflow separation, improve energy savings, and reduce blowing noise.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a diagram of the same mode as FIG. 2 regarding the fourth embodiment of the present invention. In addition, this Embodiment 4 shall be the same as that of Embodiment 3 mentioned above except the part demonstrated below.

In the fourth embodiment, the length L2 of the inner air passage wall 10 of the air outlet 309 is set to be shorter than the length L3 of the straight portion extending in the longitudinal direction of the air outlet 309 in the heat exchanger 3. Has been.

In the air conditioner according to the fourth embodiment configured as described above, the same advantages as those of the third embodiment are obtained. In addition, in Embodiment 4, since the length L3 of the linear portion of the heat exchanger is longer than the length L2 of the inner air passage wall of the air outlet, the air flowing out from the heat exchanger is It tends to flow into the air outlet vertically from the inner air channel wall side. In addition, the airflow that flows through the corner portion of the heat exchanger and flows from the side wall side of the longitudinal end portion of the blowout port easily flows vertically without being biased toward the outer air passage wall side of the blowout port. Therefore, since it becomes easy to flow into the air outlet with a uniform air volume, it is difficult to cause separation of the air flow. This also makes it possible to reduce pressure loss due to airflow separation, improve energy savings, and reduce blowing noise.

In addition, this Embodiment 4 can also be implemented in combination with

Embodiment

1 or 2 mentioned above.

Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

For example, in the embodiment described above, the main body of the air conditioner has been described as a rectangular shape having four sides in plan view, but the present invention is not limited to this, and at least one suction port and a lower portion are provided. It has at least one air outlet, in plan view, has a polygonal main body, and can be widely applied to a configuration in which the air outlet is formed along a corresponding side excluding a corner portion in the polygon. .

In addition, as an application example of the present invention, the present invention can be widely used not only for indoor units constituting a refrigeration cycle apparatus, such as indoor units for air conditioners, but also for various devices and facilities where a blower is installed.

1 turbo fan (air blower), 3 heat exchanger, 4 body side plate, 7 suction grille (suction port), 9, 109, 209 air outlet, 10 inner air passage wall, 11 outer air passage wall, 12, 212 side wall , 16 corners, 218, 218 'split walls.

Claims

A body having at least one inlet and at least one outlet at the bottom;
A blower that is housed in the main body and creates a flow of air that is sucked into the main body from the suction port and blown out from the blowout port to the target space;
A heat exchanger that is housed in the main body and that is disposed in a flow path of air that is sucked into the main body from the suction port and blown out from the air outlet to the target space,
The air outlet is in a plan view, between the heat exchanger and the side plate of the main body,
The air outlet connects the inner air passage wall on the heat exchanger side, the outer air passage wall on the side plate side of the main body, and both ends of the inner air passage wall and both ends of the outer air passage wall. A pair of side walls,
The length L2 of the inner air passage wall is larger than the length L1 of the outer air passage wall.
Air conditioner.
The main body is formed in a polygonal shape in plan view,
The outlet is disposed along a corresponding side excluding a corner portion in a polygon.
The air conditioner according to claim 1.
The inner air channel wall side portion of the air outlet is formed so that the air channel narrows toward the downstream,
The air conditioner according to claim 1 or 2.
The pair of side walls in the air outlet is divided by a divided wall surface extending toward the longitudinal center of the air outlet,
The air conditioner according to any one of claims 1 to 3.
The divided wall surface is inclined so that the side wall side approaches the inner air passage wall with respect to a line BL extending in a direction parallel to the inner air passage wall and the outer air passage wall in plan view.
The air conditioner according to claim 4.
The length L2 of the inner air passage wall of the outlet is set to be shorter than the length L3 of the linear portion extending in the longitudinal direction of the outlet in the heat exchanger.
The air conditioner according to any one of claims 1 to 5.