WO2018042689A1

WO2018042689A1 - Air conditioner

Info

Publication number: WO2018042689A1
Application number: PCT/JP2016/088971
Authority: WO
Inventors: 高橋　雅也
Original assignee: シャープ株式会社
Priority date: 2016-08-29
Filing date: 2016-12-27
Publication date: 2018-03-08
Also published as: CN109642582A; JPWO2018042689A1; JP6982573B2

Abstract

The objective of the present invention is to suppress a reduction in performance caused by a cross-flow fan in an air conditioner, by means of a configuration unlike that of the prior art. A distance (G2) between a cross-flow fan (14) and a second surface (15f) of a surrounding portion (15) in a cross section of an air conditioner (1) cut along the YZ plane is less than a distance (G1) between the cross-flow fan (14) and a first surface (16f) of a stabilizer (16). In the aforementioned cross section a slanted surface (161) representing the surface of a boundary portion, or a tangential plane of the slanted surface (161) at an intersection point (P1) between the first surface (16f) and the slanted surface (161), has a relationship such that an acute angle is formed with the first surface (16f). This relationship is established at at least a portion of the range of the length along the circumferential direction of the cross-flow fan (14) in the boundary portion and at least a portion of the range of the difference in height between the first surface (16f) and the second surface (15f).

Description

Air conditioner

The present invention relates to an air conditioner equipped with a once-through fan.

Some air conditioners (eg, air conditioners having wall-mounted indoor units) use cross-flow fans (also referred to as cross-flow fans) as blowers. In such an air conditioner, a stabilizer (also referred to as a tongue) is provided along the axial direction of the cross-flow fan. The stabilizer is a member that stabilizes the forced vortex of air generated by the rotation of the cross-flow fan.

In recent years, various technologies have been proposed to improve the ventilation structure around the once-through fan for the purpose of improving the performance of the air conditioner. For example, Patent Document 1 discloses a technique for reducing power consumption and noise of an air conditioner.

More specifically, in the air conditioner of Patent Document 1, (i) a collision wall having a facing surface facing the cross-flow fan, and (ii) an inclined surface of the fan inner edge that intersects the facing surface at an obtuse angle And are provided. In the air conditioner of Patent Document 1, the provision of the inclined surface suppresses the generation of vortex of the airflow at the position of the inclined surface.

Also, Patent Document 2 discloses a technique aimed at preventing surging (generation of abnormal noise during blowing) at the axial end of the once-through fan. More specifically, in the air conditioner of Patent Document 2, the stabilizer includes (i) a main portion having a first facing surface (facing surface located between both ends of the stabilizer) facing the cross-flow fan; ii) A second facing surface (facing surfaces located at both ends of the stabilizer) facing each end in the axial direction of the cross-flow fan is provided. The second facing surface is positioned closer to the cross-flow fan than the first facing surface. The positional relationship is intended to stabilize the circulating vortex at the axial end of the cross-flow fan (the position where the circulating vortex tends to become unstable).

International Publication No. 2013/031046 (published March 7, 2013) Japanese Patent Publication “Japanese Patent Laid-Open No. 2016-50720 (published on April 11, 2016)”

By the way, it is known that the once-through fan is a blower having a relatively low static pressure. In addition, since the cross-flow fan rotates without contacting the wall surface forming the air passage, a space in which the cross-flow fan blades (blades) do not exist is inevitably formed outside the axial end of the cross-flow fan. Formed. For this reason, the static pressure distribution of the cross-flow fan (the spatial distribution of the static pressure of the air sent from the cross-flow fan) tends to be uneven.

And, when the static pressure distribution of the cross-flow fan is non-uniform, there is a possibility that an abnormal noise due to surging occurs when a pressure loss occurs at a position where the static pressure is low. As described above, when the static pressure distribution of the cross-flow fan is non-uniform, the performance of the air conditioner may be adversely affected.

Therefore, as a measure for making the static pressure distribution of the cross-flow fan uniform, a configuration in which a structure (enclosure) surrounding the side surface of the cross-flow fan has been adopted. For example, to effectively prevent surging, the enclosure is provided at the axial end of the cross-flow fan. However, when the enclosure is provided, the flow rate of the air sent from the cross-flow fan decreases when the cross-flow fan rotates at a predetermined rotational speed.

For this reason, in order to obtain a predetermined flow rate, it is necessary to increase the rotational speed of the cross-flow fan, and the power consumption of the cross-flow fan increases. Further, there is a concern that increasing the number of rotations of the once-through fan may increase noise in the air conditioner or reduce ventilation rectification.

Furthermore, as will be described later, when the distance between the enclosure and the cross-flow fan is shorter than the distance between the stabilizer and the cross-flow fan, air currents are likely to be disturbed, and the performance of the air conditioner decreases. (In particular, the increase in power consumption and the occurrence of abnormal noise) become prominent.

An aspect of the present invention has been made in view of the above-described problems, and an object thereof is to suppress performance degradation caused by a cross-flow fan of an air conditioner with a configuration different from the conventional one.

In order to solve the above-described problem, an air conditioner according to an aspect of the present invention is an air conditioner including a cross-flow fan, and an enclosure that surrounds a side surface of an end portion in the axial direction of the cross-flow fan; A stabilizer disposed along the axial direction, and the air conditioner is cut by a plane perpendicular to the depth direction of the air conditioner and intersecting the stabilizer along the axial direction. In a cross section, when considering a first surface representing the surface of the stabilizer facing the cross-flow fan and a second surface representing the surface of the enclosure facing the cross-flow fan, the first surface and the first surface A boundary is formed between the two surfaces, and the second distance, which is the distance between the second surface and the cross-flow fan, is the distance between the first surface and the cross-flow fan. Smaller than a certain first distance, When the third surface representing the surface of the boundary portion facing the surface is further considered, the tangential plane of the third surface at the first intersection of the third surface or the first surface and the third surface is The first surface has an obtuse angle, and the relationship is at least part of a range of the boundary portion along the circumferential direction of the cross-flow fan, and the first surface and the second surface. And at least part of the range of the step.

Moreover, in order to solve said subject, the air conditioner which concerns on 1 aspect of this invention is an air conditioner provided with the cross-flow fan, Comprising: The enclosure part which encloses the side surface of the edge part of the axial direction of the said cross-flow fan And a stabilizer disposed along the axial direction, and the air conditioner is configured by a plane perpendicular to the depth direction of the air conditioner and intersecting the stabilizer along the axial direction. In the cut section, when considering a first surface representing the surface of the stabilizer facing the cross-flow fan and a second surface representing the surface of the enclosure facing the cross-flow fan, the first surface and A boundary portion is formed between the second surface and the second distance, which is a distance between the second surface and the cross-flow fan, is between the first surface and the cross-flow fan. Smaller than the first distance, which is the distance, When further considering the third surface representing the boundary surface facing the fan, the tangential plane of the third surface at the first intersection of the third surface or the first surface and the third surface is: The first surface has an obtuse angle, and the relationship includes at least part of a range of the boundary portion along the circumferential direction of the cross-flow fan, and the first surface and the second surface. It is established at least in part of the range of the step with the surface, and the boundary part constitutes a part of the enclosure part.

The air conditioner according to one aspect of the present invention has an effect that it is possible to suppress performance degradation due to the cross-flow fan of the air conditioner by using a configuration different from the conventional one.

It is a perspective view which shows the external appearance of the front direction of the air conditioner which concerns on Embodiment 1 of this invention. (A) is a top view of the air conditioner of FIG. 1, (b) is a front view of the air conditioner. (A) is a perspective view which shows the external appearance of the back direction of the air conditioner of FIG. 1, (b) is the perspective view which abbreviate | omitted illustration of the back cabinet and the heat exchanger in (a). It is the perspective view which further abbreviate | omitted illustration of the cross-flow fan in (b) of FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a cross-sectional view taken along line BB in FIG. It is an enlarged view of the area | region D3 in FIG. (A) is an enlarged view of the region D1 in FIG. 4, (b) is an enlarged view of the region D2 in FIG. 5, and (c) is another example of the enlarged view of the region D2 in FIG. (A) is an enlarged view of area | region D1 in the air conditioner as a comparative example of the air conditioner which concerns on Embodiment 1 of this invention, (b) is an enlarged view of area | region D2 in the said air conditioner. (A) is an enlarged view of area | region D1 in the air conditioner as a modification of the air conditioner concerning Embodiment 1 of this invention, (b) is an enlarged view of area | region D2 in the said air conditioner. (A) is an enlarged view of area | region D1 in the air conditioner which concerns on Embodiment 2 of this invention, (b) is an enlarged view of area | region D2 in the said air conditioner. (A) is an enlarged view of area | region D1 in the air conditioner as a modification of the air conditioner concerning Embodiment 2 of this invention, (b) is an enlarged view of area | region D2 in the said air conditioner. (A) is an enlarged view of area | region D1 in the air conditioner which concerns on Embodiment 3 of this invention, (b) is an enlarged view of area | region D2 in the said air conditioner. (A) is an enlarged view of area | region D1 in the air conditioner as a modification of the air conditioner concerning Embodiment 3 of this invention, (b) is an enlarged view of area | region D2 in the said air conditioner.

Embodiment 1
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to FIGS. First, a schematic configuration of the air conditioner 1 of the present embodiment will be described with reference to FIGS. 1 to 7.

In the present embodiment, the air conditioner 1 that is an indoor unit of a separate type wall-mounted air conditioner composed of an indoor unit and an outdoor unit will be described as an example. However, the air conditioner according to one embodiment of the present invention may be a ceiling-mounted type, a floor-standing type, or an indoor dedicated type (such as a window-mounted air conditioner) that does not have an outdoor unit.

In addition, although each member (especially FIG. 5 etc.) described below shows various members of the air conditioner 1, description of members that are not related to the present embodiment is omitted. Members that omit these descriptions may be understood to be the same as known members. Also, it should be noted that each drawing is intended to schematically explain the shape, structure, and positional relationship of each member, and is not necessarily drawn to scale.

(Outline of air conditioner 1)
FIG. 1 is a perspective view showing an external appearance of the air conditioner 1 in the front direction. As shown in FIG. 1, the air conditioner 1 includes an air flow panel 11 and a cabinet 12 (housing) as outer components. The airflow panel 11 is supported by the cabinet 12 so that it can be opened and closed.

In FIG. 1, the air conditioner 1 installed on the wall surface is viewed from the front (front), the ceiling side is up, the floor side is down, and the longitudinal direction of the air conditioner 1 is the left-right direction. A direction from the back surface (back surface) to the front surface of the air conditioner 1 is referred to as a depth direction.

Hereinafter, the horizontal direction is also referred to as the X direction, the depth direction is also referred to as the Y direction, and the vertical direction is also referred to as the Z direction. Here, the positive direction in the X direction is the right direction. The positive direction in the Y direction is the forward direction. The positive direction in the Z direction is the upward direction. In the present embodiment, description will be made assuming that the X direction, the Y direction, and the Z direction are directions orthogonal to each other.

The airflow panel 11 defines the flow path of the airflow that blows out into the room. Opening and closing of the airflow panel 11 is controlled by a control device (not shown) in the air conditioner 1 according to the operating state of the air conditioner 1. When the airflow panel 11 is opened, the outlet as the flow path is exposed.

Further, the cabinet 12 may be provided with a light receiving unit (input unit) that receives a light beam such as an infrared ray emitted from a remote controller that receives an operation instruction from a user. The cabinet 12 may further include a notification unit (for example, a display unit, a lamp, and a speaker) for notifying the user of various types of information.

2 (a) and 2 (b) are a top view and a front view of the air conditioner 1, respectively. A sectional view taken along the line AA in FIG. 2A is shown in FIG. 5 described later. A cross-sectional view taken along the line BB in FIG. 2B is shown in FIG. 6 to be described later.

2 (a), a lattice-shaped air inlet is provided on the upper surface of the air conditioner 1 (more specifically, the upper surface of the open panel of the air conditioner 1). The schematic opening shape of the entire air inlet is an elongated rectangular shape along the X direction.

And the heat exchanger 13 is provided above the inner side of the air conditioner 1 (see also FIG. 6 described later). The heat exchanger 13 functions as an evaporator that vaporizes the refrigerant during the cooling operation, and takes heat from the indoor air. On the other hand, the heat exchanger 13 functions as a condenser that liquefies the refrigerant during heating operation, and releases heat into the room.

3 (a) is a perspective view showing an appearance of the air conditioner 1 in FIG. 1 in the back direction. As shown in FIG. 3A, a back cabinet 121 (a part of the cabinet 12) is provided on the back surface of the air conditioner 1 as a member for protecting each member inside the air conditioner 1. ing.

FIG. 3B is a perspective view in which the rear cabinet 121 and the heat exchanger 13 are not shown in FIG. As shown in FIG. 3B, a cross-flow fan 14 and a motor 141 are provided inside the air conditioner 1.

The cross-flow fan 14 has a central axis parallel to the X direction and can rotate around the central axis. The cross-flow fan 14 includes a plurality of blades (not shown) for sucking and sending air in the circumferential direction. By rotating the cross-flow fan 14 around the central axis, air in the room is sucked from the air suction port, and an airflow blown out from the airflow panel 11 to the room is created. In FIG. 6 described later, an airflow W is illustrated as an example of the airflow. As shown in FIG. 6, the airflow W passes through a path that sequentially follows the air inlet, the heat exchanger 13, the cross-flow fan 14, and the airflow panel 11.

The motor 141 is a drive device that rotates the cross-flow fan 14 at a predetermined rotational speed. The motor 141 is connected to the cross-flow fan 14 by a motor shaft 142 (see FIG. 6 and the like). The number of rotations of the motor 141 (in other words, the number of rotations of the cross-flow fan 14) is controlled by a control device in the air conditioner 1. The amount of air sucked into the cross-flow fan through the heat exchanger 13 depends on the rotational speed of the cross-flow fan 14. Therefore, the amount of air blown into the room can be adjusted by controlling the rotation speed of the motor 141.

FIG. 4 is a perspective view in which the cross-flow fan 14 is not shown in FIG. As shown in FIG. 4, an enclosure 15 and a stabilizer 16 are provided inside the air conditioner 1. Note that an enlarged view of the region D1 in FIG. 4 will be described in detail in FIG.

In addition, the enclosure part 15 and the stabilizer 16 may be comprised by the integral member. The hatched portion in FIG. 4 shows an integral member that constitutes a part of the enclosure 15 and the stabilizer 16. In the present embodiment, the case where the enclosure portion 15 and the stabilizer 16 are constituted by an integral member will be described as an example (see: FIG. 8B described later). However, the enclosure 15 and the stabilizer 16 may be configured by separate members (see: FIG. 8C described later).

The enclosure 15 is a member that encloses the side surface of the end of the cross-flow fan 14 in the axial direction (X direction). As described above, the enclosure 15 is provided to prevent surging that occurs at the axial end of the cross-flow fan 14.

The stabilizer 16 extends in the X direction, has a width substantially equal to the width in the axial direction of the cross-flow fan 14, and has a length along a part of the circumferential direction of the cross-flow fan 14. It faces the fan 14 with a slight distance. The stabilizer 16 is also called a tongue. The stabilizer 16 is a member that defines a ventilation path from the cross-flow fan 14 toward the airflow panel 11. That is, the stabilizer 16 serves to stabilize the air vortex resulting from the rotation of the cross-flow fan 14 at a position suitable for the intended wind flow.

FIG. 5 is a cross-sectional view taken along the line AA in FIG. That is, FIG. 5 shows the air conditioner 1 cut by a plane perpendicular to the depth direction (Y direction) of the air conditioner 1 (more specifically, an XZ plane that intersects the stabilizer 16 along the X direction). A cross section is shown. Hereinafter, this cross section is also referred to as a first cross section. An enlarged view of the region D2 in FIG. 5 is shown in FIG. The structure of the boundary between the enclosure 15 and the stabilizer 16 in the present embodiment will be described in detail later with reference to FIG.

FIG. 6 is a cross-sectional view taken along the line BB in FIG. 2 (b). That is, FIG. 6 illustrates the air conditioner 1 by a plane perpendicular to the longitudinal direction (X direction) of the air conditioner 1 (more specifically, a YZ plane that intersects the enclosure 15 along the Y direction). A cut section is shown. The cross section may be referred to as a second cross section for distinction from the first cross section described above.

FIG. 7 is an enlarged view of a region D3 in FIG. A line L1 in FIG. 7 indicates a ridgeline of the outer wall of the enclosure 15. As shown in FIG. 7, an air gap (first air gap) exists between the outer surface of the cross-flow fan 14 and the inner surface of the stabilizer 16. The first gap is located in a region where a ventilation path is defined by the stabilizer 16. For this reason, in the said 1st space | gap, the flow volume of the air sent out from the once-through fan 14 is large compared with the following 2nd space | gap. In addition, since the inner surface of the stabilizer 16 is a surface facing the cross-flow fan 14, it may be referred to as a facing surface of the stabilizer 16.

Similarly, a gap (second gap) exists between the outer surface of the cross-flow fan 14 and the inner surface of the enclosure 15. The second gap is located in a region where the ventilation path is not defined by the stabilizer 16. For this reason, in the said 2nd space | gap, the flow volume of the air sent out from the once-through fan 14 is few compared with said 1st space | gap. In addition, since the inner surface of the enclosure part 15 is a surface facing the cross-flow fan 14, it may be referred to as an opposed surface of the enclosure part 15.

Further, as shown in FIG. 7 and described later with reference to FIG. 8B, in the air conditioner 1, the distance between the enclosure 15 and the cross-flow fan 14 (the length of the second gap). ) Is shorter than the distance between the stabilizer 16 and the cross-flow fan 14 (the length of the first gap). As described below, in this case, turbulence of airflow is likely to occur, and the performance degradation of the air conditioner becomes significant.

However, in both of the above-mentioned

Patent Documents

1 and 2, in this case, the technical idea of suppressing the performance degradation of the air conditioner by appropriately setting the angle of the region near the boundary between the stabilizer and the enclosure. Is not disclosed or suggested.

On the other hand, as will be described below, the air conditioner 1 is configured for the purpose of suppressing the above-described turbulence of the air flow by appropriately setting the angle.

(Comparative example)
Then, in order to demonstrate the effect of the air conditioner 1 of this embodiment more clearly, the comparative example of the said air conditioner 1 is described. Hereinafter, the air conditioner as the comparative example is referred to as an air conditioner 1x. The basic structure of the air conditioner 1x is the same as that of the air conditioner 1, but the structure of the boundary portion between the enclosure and the stabilizer is different from that of the air conditioner 1. This is the same in the air conditioners according to the embodiments and modifications described below.

Hereinafter, the structure of the above-described boundary portion in the air conditioner 1x will be described with reference to FIG. FIG. 9A is an enlarged view of a region D1 of FIG. 4 in the air conditioner 1x. FIG. 9B is an enlarged view of a region D2 of FIG. 5 in the air conditioner 1x.

As shown in FIG. 9, the air conditioner 1x is different from the air conditioner 1 in that an inclined surface 161 (see FIG. 8) described later is not provided in the stabilizer. Here, in order to distinguish from the stabilizer 16 of the air conditioner 1, the stabilizer of the air conditioner 1x is referred to as a stabilizer 16x.

Further, as shown in FIG. 9B, the surface representing the opposing surface of the stabilizer 16x in the first cross section is referred to as a first surface 16xf. Moreover, the opposing surface of the enclosure part 15 is called the 2nd surface 15f. In the first cross section, the distance between the first surface 16xf and the cross-flow fan 14 (the length of the first gap described above) is referred to as a distance G1 (first distance). The distance between the second surface 15f and the cross-flow fan 14 (the length of the second gap described above) is referred to as a distance G2 (second distance).

In the first cross section, the distances G1 and G2 are distances in the Z direction (height direction), respectively. The distances G1 and G2 are constant values in the X direction. The distance G2 is smaller than the distance G1.

Therefore, there is a step in the Z direction between the stabilizer 16x and the enclosure 15. That is, a boundary portion that is a region where a step in the Z direction is formed is formed between the stabilizer 16x and the surrounding portion 15. The step in the air conditioner 1x is constituted by the inner wall of the cabinet 12 extending in the Z direction. Hereinafter, in the first cross section of FIG. 9B, a surface showing the inner wall is referred to as an orthogonal surface 191x.

Here, in the first cross section, the intersection of the first surface 16xf and the orthogonal surface 191x is referred to as a first intersection P1. An intersection between the second surface 15f and the orthogonal surface 191x is referred to as a second intersection P2. The angle formed by the orthogonal surface 191x and the first surface 16xf is represented as θ. As shown in FIG. 9B, in the air conditioner 1x, the orthogonal plane 191x and the first plane 16xf are orthogonal to each other in the first cross section, and θ = 90 °.

In the air conditioner 1x, since θ = 90 °, the height Hx of the orthogonal plane 191x in the first cross section is expressed as Hx = G1-G2. That is, in the air conditioner 1x, since θ = 90 °, there is a large step in the Z direction (orthogonal surface 191x that is a step of height Hx) between the first surface 16xf and the second surface 15f. Will be. Therefore, in the first cross section, the first surface 16xf and the second surface 15f do not have smooth continuity in the Z direction due to the presence of the orthogonal surface 191x. Even when the angle θ is an acute angle (when θ <90 °), the first surface 16xf and the second surface 15f do not have smooth continuity in the Z direction.

Therefore, when the angle θ is not an obtuse angle (when θ ≦ 90 °), an abrupt turbulence of the airflow occurs between the enclosure 15 and the stabilizer 16x due to the orthogonal plane 191x. As a result, there arises a problem that the performance degradation of the air conditioner 1x (especially increase in power consumption and generation of abnormal noise) becomes remarkable due to the disturbance of the airflow.

When the orthogonal surface 191x is a curved surface, the angle θ is an angle formed by the tangent plane of the orthogonal surface 191x at the first intersection P1 and the first surface 16xf. Even when the orthogonal surface 191x is a curved surface (for example, a convex surface swollen in the negative direction of the X direction), the above-described problem occurs when the angle θ is not an obtuse angle.

(Boundary portion between the enclosure 15 and the stabilizer 16 in the air conditioner 1)
Based on the above problems, the inventor of the present application has the configuration of the air conditioner 1 for reducing the turbulence of the airflow generated due to the difference in distance between the cross-flow fan 14 and the enclosure 15 and the stabilizer 16 ( The structure of the boundary portion, which is a region near the boundary between the enclosure 15 and the stabilizer 16) was newly conceived. Hereinafter, the structure of the boundary portion in the air conditioner 1 will be described with reference to FIG.

The boundary portion according to one aspect of the present invention eliminates or alleviates the step in the Z direction that exists between the stabilizer 16x and the surrounding portion 15 of the comparative example, and the first surface 16f (described later) of the stabilizer 16 The purpose is to give smooth continuity to the second surface 15f of the enclosure 15. The boundary portion is realized by a shape change of the stabilizer 16, a shape change of the surrounding portion 15, or another member added between the stabilizer 16 and the surrounding portion 15. Hereinafter, a specific example of the boundary portion will be described.

8A is an enlarged view of a region D1 in FIG. 4 in the air conditioner 1. FIG. 8B is an enlarged view of a region D2 in FIG. 5 in the air conditioner 1. FIG. 8C is another example of an enlarged view of the region D2. Specifically, FIG. 8B illustrates a case in which a part of the enclosure 15 and the stabilizer 16 are formed of an integral member. On the other hand, FIG. 8C illustrates a case where the enclosure 15 and the stabilizer 16 are formed of separate members. In addition, the whole enclosure part 15 and the stabilizer 16 may be comprised by the integral member.

As shown in FIG. 8, in the air conditioner 1, an inclined surface 161 (third surface) is provided on a part of the opposing surface of the stabilizer 16. In addition, in the 1st cross section shown by FIG.8 (b), the surface showing the opposing surface of the stabilizer 16 is called the 1st surface 16f.

The inclined surface 161 constitutes a part of the stabilizer 16, and may be formed by changing the shape of the stabilizer 16, or may be formed by another member bonded to the end of the stabilizer 16. Specifically, the inclined surface 161 is formed as a surface whose height increases from the stabilizer 16 toward the enclosure 15, in other words, as a surface that approaches the cross-flow fan 14. In the present embodiment, the case where the inclined surface 161 is a flat surface will be described as an example. However, the inclined surface 161 may be a curved surface. The inclined surface 161 should just be provided so that the obtuse angle condition mentioned later may be satisfy | filled. The same applies to the inclined surfaces of the air conditioners according to the embodiments and modifications described below.

8 (b), in the air conditioner 1, the portion constituting the boundary between the first surface 16f of the stabilizer 16 and the second surface 15f of the enclosure 15 is referred to as a boundary portion 191. In the first cross section, the boundary portion 191 includes an orthogonal surface 171 and an inclined surface 161. That is, the inclined surface 161 constitutes a part of the boundary portion 191. The orthogonal surface 171 is an inner wall of the cabinet 12 extending in the Z direction. The surface of the boundary portion 191 that faces the cross-flow fan 14 is also referred to as a third surface. In the present embodiment, the inclined surface 161 is the third surface.

In the present specification, the phrase “surface A and surface B face each other” means that surface A and surface B are parallel to each other (that is, normal vector nA of surface A and normal vector of surface B). Note that this does not mean only a positional relationship (where nB is parallel to each other).

Specifically, in the present specification, “the surface A and the surface B face each other” means that the normal vector nA and the normal vector nB form an angle other than 90 ° (that is, the modulus). The inner product of the line vector nA and the normal vector nB is non-zero).

Here, in the first cross section, the angle formed by the inclined surface 161 and the first surface 16f is represented as θ. In the air conditioner 1, the inclined surface 161 is provided so as to satisfy θ> 90 °. Thus, in the air conditioner 1, a part of the boundary portion 191 is configured to form an obtuse angle with the first surface 16f. In this respect, the boundary portion 191 of the air conditioner 1 is different from the step portion (orthogonal plane 191x) of the air conditioner 1x described above.

In the air conditioner according to one aspect of the present invention, the shape of the stabilizer 16 is designed in advance so as to include the inclined surface 161 that forms the angle θ described above. In this case, the stabilizer 16 including the inclined surface 161 can be efficiently manufactured by manufacturing the stabilizer 16 by integral molding. Or the stabilizer 16 containing the inclined surface 161 can also be manufactured by performing the process which attaches the inclined surface 161 to a part of above-mentioned stabilizer 16x. This also applies to an inclined surface 161a of a modified example described later.

In the first cross section, an intersection between the first surface 16f and the boundary portion 191 (more specifically, the inclined surface 161) is referred to as a first intersection P1. In addition, an intersection between the second surface 15f and the boundary portion 191 (more specifically, the orthogonal surface 171) is referred to as a second intersection P2. An intersection between the inclined surface 161 and the orthogonal surface 171 is represented as a third intersection P3.

Further, similarly to the description of the stabilizer 16x based on FIG. 9, in the first cross section, the distance between the first surface 16x and the cross-flow fan 14 (the length of the first gap described above) is the distance G1. This is referred to as (first distance). The distance between the second surface 15f and the cross-flow fan 14 (the length of the second gap described above) is referred to as a distance G2 (second distance).

Here, the height of the inclined surface 161 (that is, the maximum height of the inclined surface 161) at the third intersection P3 is represented as h. In this case, the height H of the orthogonal plane 171 from the third intersection P3 to the second intersection P2 is expressed as H = G1-G2-h. That is, in the air conditioner 1, the height H of the orthogonal surface 171 is lower than the height Hx of the orthogonal surface 191x of the air conditioner 1x. Since H> 0, h <G1-G2. Thus, the height h of the inclined surface 161 is smaller than the difference between the distance G1 (first distance) and the distance G2 (second distance).

In addition, as shown in FIG. 8C, the enclosure 15 and the stabilizer 16 may be configured by separate members. In this case, the enclosure 15 and the stabilizer 16 can be separated or connected to each other. In FIG. 8C, for the sake of explanation, the fact that the enclosure 15 and the stabilizer 16 are separated members is emphasized by illustrating a gap between them.

Further, the inclined surface 161 is not limited to the form starting from the first surface 16f. That is, as shown in FIG. 8C, the inclined surface 161 may start from a portion rising from the first surface 16f in the Z direction and reach the start end portion of the second surface 15f in the X direction. . Also in this embodiment, the step in the Z direction existing between the stabilizer 16x and the surrounding portion 15 can be reduced.

(Effect of air conditioner 1)
As described above, in the air conditioner 1, the inclined surface 161 is provided in the first cross section so that the angle θ formed by the inclined surface 161 (third surface) of the boundary portion 191 and the first surface 16f is an obtuse angle. It has been.

In other words, the air conditioner 1 is configured such that the height H of the orthogonal plane 171 is lower than the height Hx of the orthogonal plane 191x of the air conditioner 1x in the first cross section. That is, in the air conditioner 1, the height of the step in the Z direction at the boundary portion is smaller than that of the air conditioner 1x in the first cross section. As a result, in the first cross section, the first surface 16f and the second surface 15f have smoother continuity than the above-described air conditioner 1x by the boundary portion 191. In other words, the discontinuity is reduced. Is done.

Therefore, in the boundary portion 191, the change in the flow of the air flow that is likely to occur near the boundary between the enclosure 15 and the stabilizer 16 becomes gradual, and the turbulence of the air flow can be reduced. As a result, the performance degradation of the air conditioner 1 resulting from the turbulence of the airflow can be suppressed.

As described above, according to the air conditioner 1, it is possible to suppress the performance degradation of the air conditioner 1 due to the cross-flow fan 14 with a configuration different from the conventional one. Moreover, the reliability of the air conditioner 1 can also be improved by suppressing the performance degradation of the air conditioner 1.

As described above, when the inclined surface 161 (third surface) is a curved surface, the angle θ is defined as the angle formed between the tangential plane of the inclined surface 161 at the first intersection P1 and the first surface 16f. Is done. Even when the inclined surface 161 is a curved surface, the same effect as described above can be obtained if the angle θ is an obtuse angle.

That is, in the air conditioner 1, the tangent plane of the inclined surface 161 at the first intersection P1 between the (i) inclined surface 161 or (ii) the first surface 16f and the inclined surface 161 has an obtuse angle with the first surface 16. What is necessary is just to be comprised so that it may be comprised. Hereinafter, this angle relationship is referred to as an obtuse angle condition.

In the present embodiment, the obtuse angle condition described above is exemplified in a part of the boundary portion 191, in other words, in a part of a step range between the first surface 16 f and the second surface 15 f. However, as described below, the obtuse angle condition may be satisfied in the entire range of the step. That is, the obtuse angle condition only needs to be satisfied in at least a part of the range of the step.

Further, the obtuse angle condition described above may be satisfied in at least a part of the range of the length along the circumferential direction of the cross-flow fan 14 at the boundary portion 191.

Moreover, in the air conditioner 1, since the inclined surface 161 is provided in a part of level | step difference of the 1st surface 16f and the 2nd surface 15f in the 1st cross section, the size of the inclined surface 161 is the air conditioner 1a mentioned later. Smaller than the inclined surface 161a.

That is, the air conditioner 1 is configured to reduce the above-described airflow turbulence with the minimum necessary size of the inclined surface 161. Therefore, in order to keep the design change from the conventional air conditioner to the minimum necessary, it is one idea to adopt the configuration of the air conditioner 1.

In addition, when it is desired that the intended air vortex position and ventilation characteristics are not significantly changed by providing the stabilizer 15, it is preferable to adopt the configuration of the air conditioner 1. In the configuration of the air conditioner 1, since the size of the inclined surface 161 is relatively small, it is possible to avoid excessively narrowing the air path through which the air sent from the cross-flow fan 14 passes. For this reason, reduction of the flow rate of the air can also be prevented.

Further, in the first cross section, the flow of the airflow is different between a portion where the inclined surface 161 exists and a portion where the inclined surface 161 does not exist. For this reason, compared with the case where the inclined surface 161 is not provided (that is, the above-described configuration of the air conditioner 1x), the frequency band of noise caused by the flow of the airflow can be widely distributed.

That is, according to the air conditioner 1, a relatively broad noise spectrum can be obtained. Therefore, it becomes difficult to generate a harsh peak sound (strong noise in a specific frequency band). Further, when the step is present, the frequency band of noise is more widely distributed, so that the generation of peak sound can be prevented more effectively.

[Modification]
Then, with reference to FIG. 10, the air conditioner 1a as a modification of the above-mentioned air conditioner 1 is demonstrated. FIG. 10A is an enlarged view of a region D1 of FIG. 4 in the air conditioner 1a. FIG. 10B is an enlarged view of a region D2 in FIG. 5 in the air conditioner 1a.

As shown in FIG. 10, the air conditioner 1a is obtained by replacing the inclined surface 161 in the air conditioner 1 with an inclined surface 161a (boundary portion, third surface). Like the inclined surface 161, the inclined surface 161a is a part constituting the boundary between the first surface 16f and the second surface 15f.

As shown in FIG. 10 (b), in the air conditioner 1a, the boundary between the first surface 16f and the second surface 15f is formed by only the inclined surface 161a in the first cross section. That is, the inclined surface 161a constitutes the entire boundary portion. Further, the angle θ formed by the inclined surface 161a and the first surface 16f is an obtuse angle. Thus, in the air conditioner 1a, the above obtuse angle condition is satisfied in the entire boundary portion.

Here, in the first cross section of FIG. 10B, the intersection of the second surface 15f and the inclined surface 161a is defined as a second intersection P2. The height of the inclined surface 161a reaching the first intersection P1 and the second intersection P2 (that is, the maximum height of the inclined surface 161a) is represented as h. In the air conditioner 1a, since the orthogonal surface is not included in the boundary portion, the height H of the orthogonal surface is zero. Therefore, h = G1-G2. That is, in the air conditioner 1a, the height h is equal to the difference between the distance G1 (first distance) and the distance G2 (second distance).

According to the air conditioner 1a, since the height H of the orthogonal surface is 0, the step in the Z direction between the first surface 16f and the inclined surface 161a and the second surface 15f are inclined in the first cross section. The step in the Z direction with respect to the surface 161a can be eliminated.

That is, according to the inclined surface 161a, the first surface 16f and the second surface 15f can be provided with smoother continuity than the inclined surface 161 described above. For this reason, according to the air conditioner 1a, it is possible to more effectively reduce the turbulence of the airflow generated between the enclosure 15 and the stabilizer 16 at the boundary.

[Embodiment 2]
The following describes Embodiment 2 of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the above embodiment are denoted by the same reference numerals and description thereof is omitted.

(A) of FIG. 11 is an enlarged view of a region D1 of FIG. 4 in the air conditioner 2 of the present embodiment. FIG. 11B is an enlarged view of a region D2 in FIG. As shown in FIG. 11, the air conditioner 2 is obtained by replacing (i) the stabilizer 16 with the stabilizer 26 and (ii) adding a boundary portion 271 in the air conditioner 1 described above.

The stabilizer 26 of the present embodiment is different from the stabilizer 16 of the first embodiment described above in that it does not have an inclined surface as a part of the stabilizer 26. Note that, as shown in the first cross section of FIG. 11B, the first surface of the stabilizer 26 is referred to as a first surface 26f.

In the present embodiment, the boundary portion 271 is constituted by a member separate from the stabilizer 26 and the enclosure portion 15. For example, the boundary portion 271 may be a plate-like member made of a known plastic material. The surface of the boundary portion 271 that faces the cross-flow fan 14 is referred to as an inclined surface 271f (third surface).

As shown in FIG. 11 (b), in the air conditioner 2, in the first cross section, the first surface 26f and the second surface 15f are separated only by the inclined surface 271f, similarly to the air conditioner 1a described above. The boundary is configured. The shape of the boundary portion 271 is designed in advance so that the angle θ formed by the inclined surface 271f and the first surface 26f becomes an obtuse angle.

According to the air conditioner 2, the obtuse angle condition described above is satisfied by the inclined surface 271f by providing the boundary portion 271 as a separate member from the stabilizer 26 without changing the design or processing of the stabilizer 26. Can do. For this reason, the design and manufacture of the stabilizer 26 can be particularly facilitated.

Further, the obtuse angle condition described above can be satisfied without changing the design or processing of the enclosure 15 (see Embodiment 3 described later). For this reason, design and manufacture of the enclosure 15 can be facilitated. As described above, according to the air conditioner 2, the advantage that the design and manufacture of the stabilizer 26 and the enclosure 15 can be particularly facilitated is obtained.

[Modification]
Then, with reference to FIG. 12, the air conditioner 2a as a modification of the above-mentioned air conditioner 2 is described. (A) of FIG. 12 is the enlarged view of the area | region D1 of FIG. 4 in the air conditioner 2a. FIG. 12B is an enlarged view of a region D2 in FIG. 5 in the air conditioner 2a.

12B, the air conditioner 2a is obtained by replacing the boundary portion 271 in the air conditioner 2 with a sub boundary portion 271a. The sub-boundary portion 271a is different from the above-described boundary portion 271 in that it is a member that forms a part of the boundary portion.

That is, in the air conditioner 2a, in the first cross section, the boundary portion 291 that forms the boundary between the first surface 26f and the second surface 15f is composed of the sub boundary portion 271a and the orthogonal surface 171 described above. That is, as in the first embodiment, a part of the boundary portion 291 may be configured to form an obtuse angle with the first surface 26f.

In the air conditioner 2a, the surface of the sub boundary portion 271a facing the cross-flow fan 14 is referred to as an inclined surface 271af (third surface). In the air conditioner 2 a, the inclined surface 271 af is a surface of the boundary portion 291 that faces the cross-flow fan 14.

[Embodiment 3]
Next, the air conditioner 3 of the present embodiment will be described with reference to FIG. FIG. 13A is an enlarged view of a region D <b> 1 of FIG. 4 in the air conditioner 3. FIG. 13B is an enlarged view of a region D2 in FIG.

As shown in FIG. 13, the air conditioner 3 is obtained by replacing the enclosure 15 with an enclosure 35 in the air conditioner 1 described above. Note that, as shown in FIG. 11B, the second surface of the enclosure 35 is referred to as a second surface 35f.

Then, as shown in FIG. 13B, in the air conditioner 3, an inclined surface 351 (boundary portion, third surface) is provided on a part of the facing surface of the enclosure portion 35. The inclined surface 351 in the present embodiment constitutes a part of the enclosure portion 35. In the first cross section, the angle θ formed by the inclined surface 351 and the first surface 16f is an obtuse angle.

In the air conditioner 3, the shape of the enclosure 35 is designed in advance so that the inclined surface 351 that satisfies the obtuse angle condition is provided. For example, the enclosure portion 35 including the inclined surface 351 may be manufactured by performing processing (for example, cutting) for providing the inclined surface 351 on a part of the above-described enclosure portion 15. Or you may manufacture the enclosure part 35 containing the inclined surface 351 by integral molding. The same applies to the inclined surface 351a of a modified example described later.

In the present embodiment, the case where the enclosure portion 35 including the inclined surface 351 is manufactured by performing a process of cutting a part of the second surface 15f described above will be described as an example. In the first cross section, the inclined surface 351 of the present embodiment constitutes the entire boundary portion constituting the boundary between the first surface 16f and the second surface 35f.

By the way, in the second cross section of FIG. 6 described above, the outer surface of the cross-flow fan 14 draws an arc centered on the motor shaft 142 (more specifically, the center point of the motor shaft 142). In the second cross section, the portion other than the inclined surface 351 of the enclosure portion 35 also draws a part of an arc centered on the motor shaft 142. That is, the arc drawn by the second surface 35f is concentric with the arc drawn by the outer surface of the cross-flow fan 14.

In addition, in the present embodiment, the inclined surface 351 draws an arc concentric with the portion other than the inclined surface 351 of the enclosure 35 in the second cross section (in other words, in a three-dimensional space (XYZ orthogonal coordinate space)). It is formed so as to form a concentric curved surface (side surface of a cylinder).

According to the air conditioner 3, in the second cross section, the inclined surface 351 can have a shape similar to a portion other than the inclined surface 351 of the enclosure 35. For this reason, it is possible to more effectively reduce the turbulence of the airflow in the vicinity of the enclosure portion 35.

In the above-described first embodiment, the boundary portion constitutes a part of the stabilizer. Further, in the above-described second embodiment, the boundary portion is configured by a member separate from the stabilizer and the enclosure portion. Also in the air conditioner of

Embodiments

1 and 2, the boundary portion may be configured to form a concentric curved surface with a portion other than the boundary portion of the enclosure, similarly to the air conditioner 3 of the present embodiment. Good. In this case, the same effect as the air conditioner 3 can be obtained.

[Modification]
Then, with reference to FIG. 14, the air conditioner 3a as a modification of the above-mentioned air conditioner 3 is described. FIG. 14A is an enlarged view of a region D1 of FIG. 4 in the air conditioner 3a. Moreover, FIG.14 (b) is an enlarged view of the area | region D2 of FIG. 5 in the air conditioner 3a.

14B, the air conditioner 3a is obtained by replacing the inclined surface 351 in the air conditioner 3 with an inclined surface 351a (boundary portion, third surface). The inclined surface 351 a constitutes a part of the enclosure 35, similarly to the inclined surface 351.

The inclined surface 351a is the same as the above-described inclined surface 351 in that it constitutes the entire boundary portion. However, the inclined surface 351a is different from the inclined surface 351 in that the inclined surface 351a is configured as a flat surface instead of a curved surface, like the inclined surfaces of the first and second embodiments. Thus, even if the inclined surface constitutes a part of the enclosure 35, the inclined surface may be a flat surface. As shown in FIG. 14B, the inclined surface 351a only needs to be provided so as to satisfy the obtuse angle condition described above.

[Summary]
An air conditioner (1) according to an aspect 1 of the present invention is an air conditioner including a cross-flow fan (14), and surrounds a side surface of an end portion in the axial direction (X direction) of the cross-flow fan ( 15) and a stabilizer arranged along the axial direction, and is perpendicular to the depth direction (Y direction) of the air conditioner, and intersects with the stabilizer along the axial direction. In the cross section (that is, the first cross section described above) of the air conditioner, the first surface (16f) representing the surface of the stabilizer facing the cross flow fan and the enclosure portion facing the cross flow fan. When considering the second surface (15f) representing a surface, a boundary portion (inclined surface 161) is formed between the first surface and the second surface, and the second surface and the second surface The second distance (distance) which is the distance to the once-through fan 2) is smaller than a first distance (distance G1) that is a distance between the first surface and the cross-flow fan, and is a third surface (inclined surface 161) that represents the boundary surface facing the cross-flow fan. ) Is further considered, the tangential plane of the third surface at the first intersection (P1) between the third surface or the first surface and the third surface forms an obtuse angle with the first surface ( In other words, the above obtuse angle condition) is satisfied, and the above relationship includes at least a part of a range of a length along the circumferential direction of the cross-flow fan at the boundary, and the first surface and the second surface. It is established in at least a part of the range of the step.

As described with reference to FIG. 9 described above (particularly, the first cross section shown in FIG. 9B), if the obtuse angle condition is not satisfied at the boundary, the boundary exists. As a result, air current disturbance is likely to occur between the enclosure and the stabilizer. As a result, the performance degradation of the air conditioner becomes significant due to the turbulence of the airflow.

On the other hand, according to the above configuration, as described with reference to FIG. 8 described above (particularly, the first cross section shown in FIG. 8B), the obtuse angle condition is satisfied in a part of the boundary portion. Therefore, the turbulence of the airflow between the enclosure and the stabilizer can be reduced. Therefore, the performance degradation of the air conditioner due to the turbulence of the airflow can be suppressed. As described above, according to the air conditioner according to one aspect of the present invention, it is possible to suppress the performance degradation caused by the cross-flow fan of the air conditioner with a configuration different from the conventional one.

In the air conditioner according to aspect 2 of the present invention, in the aspect 1, in the cross section, a direction orthogonal to the axial direction and the depth direction is a height direction (Z direction). It may be an inclined surface whose height increases from one surface toward the second surface.

According to the above configuration, the obtuse angle condition can be satisfied by forming the inclined surface by the boundary portion in the first cross section.

In the air conditioner according to aspect 3 of the present invention, in the aspect 2, the maximum value (h) of the height of the inclined surface in the cross section is (i) a difference between the first distance and the second distance. Or (ii) equal to the difference between the first distance and the second distance.

According to the above configuration, when the maximum value of the height of the inclined surface is made smaller than the difference between the first distance and the second distance, the maximum value is equal to the difference between the first distance and the second distance. Compared to the case, the size of the inclined surface is small. For this reason, it becomes possible to reduce the above-mentioned turbulence of the airflow with the minimum necessary size of the inclined surface.

On the other hand, when the maximum value of the height of the inclined surface is made equal to the difference between the first distance and the second distance, it differs from the case where the maximum value is made smaller than the difference between the first distance and the second distance. In the first cross section, the step in the height direction can be eliminated between the first surface and the inclined surface and between the second surface and the inclined surface. That is, in the first cross section, the first surface and the second surface can have smoother continuity. For this reason, it becomes possible to reduce the above-mentioned disturbance of the airflow more effectively.

In the air conditioner according to aspect 4 of the present invention, in any one of the aspects 1 to 3, the boundary portion may constitute a part of the stabilizer.

According to the above configuration, the inclined surface in the first cross section can be formed by providing a part of the boundary portion in the stabilizer. Therefore, for example, the obtuse angle condition described above can be satisfied by appropriately designing the shape of the stabilizer (or performing a process of providing an inclined surface on a part of the stabilizer).

An air conditioner according to an aspect 5 of the present invention is the air conditioner according to any one of the aspects 1 to 3, wherein the boundary portion is configured by a member (boundary portion 271) separate from the stabilizer and the enclosure portion. May be.

According to the above configuration, the inclined surface in the first cross section is formed by providing the boundary as a separate member without changing the design of the stabilizer and the enclosure (or processing the stabilizer and the enclosure). Thus, the obtuse angle condition described above can be satisfied. Therefore, the design and manufacture of the stabilizer and the enclosure can be facilitated.

An air conditioner according to an aspect 6 of the present invention is an air conditioner including a cross-flow fan, and is disposed along an axial direction that surrounds a side surface of an axial end portion of the cross-flow fan. And a cross section that is perpendicular to the depth direction of the air conditioner and that intersects the stabilizer along the axial direction and faces the cross-flow fan in a cross section of the air conditioner. When considering the first surface representing the surface of the stabilizer and the second surface representing the surface of the enclosure facing the cross-flow fan, there is a boundary between the first surface and the second surface. A second distance that is a distance between the second surface and the cross-flow fan is smaller than a first distance that is a distance between the first surface and the cross-flow fan, The boundary surface facing the cross-flow fan When the third surface is further considered, the tangential plane of the third surface at the first intersection of the third surface or the first surface and the third surface has an obtuse angle with the first surface. And the relationship is at least part of a range of the boundary portion along the circumferential direction of the cross-flow fan, and at least part of a step difference between the first surface and the second surface. The boundary portion constitutes a part of the enclosure portion.

According to the above configuration, the inclined surface in the first cross section can be formed by providing a part of the boundary portion in the enclosure portion. Therefore, for example, the obtuse angle condition described above can be satisfied by appropriately designing the shape of the surrounding portion (or performing a process of providing an inclined surface in a part of the surrounding portion).

The air conditioner according to aspect 7 of the present invention is the air conditioner according to any one of the aspects 1 to 6, wherein the boundary portion forms a concentric curved surface with a portion other than the boundary portion of the enclosure portion. Good.

According to the above configuration, it is possible to more effectively reduce the turbulence of the airflow in the vicinity of the enclosure.

[Additional Notes]
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

1, 1a, 2, 2a, 3, 3a Air conditioner 14

Cross-flow fan

15, 35

Enclosure

15f,

35f Second surface

16, 26

Stabilizer

16f, 26f

First surface

161, 271f, 271af

Inclined surface

161a, 351, 351a Inclined surface (boundary, third surface)
191, 271, 291 Boundary portion 271a Sub-boundary portion G1 distance (first distance)
G2 distance (second distance)
P1 1st intersection h Height (maximum value of the height of the inclined surface)
θ angle

Claims

An air conditioner equipped with a once-through fan,
An enclosure that surrounds the side surface of the axial end of the cross-flow fan;
A stabilizer disposed along the axial direction,
In a cross-section obtained by cutting the air conditioner by a plane perpendicular to the depth direction of the air conditioner and intersecting the stabilizer and the axial direction,
A first surface representing the surface of the stabilizer facing the cross-flow fan;
When considering the second surface representing the surface of the enclosure facing the cross-flow fan,
A boundary portion is formed between the first surface and the second surface,
The second distance, which is the distance between the second surface and the cross-flow fan, is smaller than the first distance, which is the distance between the first surface and the cross-flow fan,
When further considering a third surface representing the surface of the boundary portion facing the cross-flow fan,
The tangential plane of the third surface at the first intersection of the third surface or the first surface and the third surface has an obtuse angle with the first surface,
The above relationship is established in at least a part of a range of a length along the circumferential direction of the cross-flow fan in the boundary part and at least a part of a range of a step between the first surface and the second surface. An air conditioner characterized by that.
In the cross section, a direction perpendicular to the axial direction and the depth direction is a height direction,
2. The air conditioner according to claim 1, wherein the third surface is an inclined surface having a height that increases from the first surface toward the second surface.
In the above cross section,
The maximum height of the inclined surface is
(I) smaller than the difference between the first distance and the second distance, or
(Ii) The air conditioner according to claim 2, wherein the air conditioner is equal to a difference between the first distance and the second distance.
The air conditioner according to any one of claims 1 to 3, wherein the boundary portion constitutes a part of the stabilizer.
The air conditioner according to any one of claims 1 to 3, wherein the boundary portion is configured by a member separate from the stabilizer and the enclosure portion.
An air conditioner equipped with a once-through fan,
An enclosure that surrounds the side surface of the axial end of the cross-flow fan;
A stabilizer disposed along the axial direction,
In a cross-section obtained by cutting the air conditioner by a plane perpendicular to the depth direction of the air conditioner and intersecting the stabilizer and the axial direction,
A first surface representing the surface of the stabilizer facing the cross-flow fan;
When considering the second surface representing the surface of the enclosure facing the cross-flow fan,
A boundary portion is formed between the first surface and the second surface,
The second distance, which is the distance between the second surface and the cross-flow fan, is smaller than the first distance, which is the distance between the first surface and the cross-flow fan,
When further considering a third surface representing the surface of the boundary portion facing the cross-flow fan,
The tangential plane of the third surface at the first intersection of the third surface or the first surface and the third surface has an obtuse angle with the first surface,
The above relationship is established in at least a part of the range of the length along the circumferential direction of the cross-flow fan in the boundary part and at least a part of the range of the step between the first surface and the second surface. ,
The air conditioner characterized in that the boundary portion constitutes a part of the enclosure.
The air conditioner according to any one of claims 1 to 6, wherein the boundary portion forms a concentric curved surface with a portion other than the boundary portion of the enclosure.