WO2020136797A1

WO2020136797A1 - Outdoor unit and refrigeration cycle device

Info

Publication number: WO2020136797A1
Application number: PCT/JP2018/048112
Authority: WO
Inventors: 加藤　康明; 前田　剛志; 中村　伸
Original assignee: 三菱電機株式会社
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-02
Also published as: JPWO2020136797A1

Abstract

This outdoor unit is provided with: a housing; an axial flow blower that forms, by rotary blades, a flow of air passing through the housing; and a heat exchanger that has a plurality of flat pipes arranged in the vertical direction with gaps therebetween, that is disposed in the radial direction with respect to the rotation axis of the axial flow blower, and that is disposed on the windward side of the axial flow blower in the flow of air formed by the axial flow blower. The plurality of flat pipes each have a flat shape having a long axis passing a first end portion located on the disposition side of the axial flow blower and a second end portion located, relative to the first end portion, on the windward side of the flow of air passing through the heat exchanger. When a first vector represents a vector that is in the rotation direction of each of the rotary blades and that is a tangent line of an opposing part, in a rotation circle drawn by the leading end of the rotary blade, at a position closest to the heat exchanger, and a second vector represents a vector that passes the first end portion of a first flat pipe disposed at the position closest to the opposing part among the plurality of flat pipes from the second end portion as a starting point, an angle formed by the first vector and the second vector is less than 90 degrees.

Description

Outdoor unit and refrigeration cycle device

The present invention relates to an outdoor unit used for a refrigeration cycle apparatus such as an air conditioner having a flat tube as a heat transfer tube, and a refrigeration cycle apparatus having the outdoor unit.

Conventionally, as an outdoor unit used for a refrigeration cycle device such as an air conditioner, an outdoor unit equipped with a flat tube has been proposed (see Patent Document 1).

Japanese Patent Laid-Open No. 10-220989

In the outdoor unit of the air conditioner of Patent Document 1, a plurality of flat tubes are arranged in the vertical direction, and the flat tubes are provided in parallel with each other in the horizontal direction. Further, each of the flat tubes is provided so that the major axis direction is parallel to the horizontal direction in the vertical cross section of the conduit. Here, in the outdoor unit, when the heat exchanger is arranged in the radial direction with respect to the rotation axis of the blower, since the distance between the heat exchanger and the blower is short, the heat exchanger passes between the flat tubes of the heat exchanger. The wind velocity of the air flowing into the blower becomes high. Therefore, the collision of the air having a high wind speed with the rotor blades of the blower causes ventilation resistance, and noise is generated.

The present invention is to solve the above problems, when the heat exchanger is arranged in the radial direction with respect to the rotation axis of the blower, an outdoor unit that reduces ventilation resistance and suppresses noise, and Provided is a refrigeration cycle apparatus including the outdoor unit.

The outdoor unit of the present invention is an axial flow that forms a flow of air passing through the housing by a housing and a plurality of rotor blades arranged inside the housing and arranged in a radial direction with respect to a virtual rotation axis. An air blower and a plurality of flat tubes arranged at intervals in the up-and-down direction. The air blower is arranged inside the housing in a radial direction with respect to the rotation axis of the axial blower, and is formed by the axial blower. And a heat exchanger arranged on the windward side of the axial blower in the flow of, and each of the plurality of flat tubes has a first end located on the arrangement side of the axial blower and a first end. And has a flat shape with a long axis passing through the second end located on the windward side of the air flow passing through the heat exchanger, and is the most common in the heat exchanger in the rotary circle drawn by the tip of the rotor blade. A tangential line of the facing portion that is close to the rotor blade, and a vector in the rotating direction of the rotor blade is defined as a first vector, and in the first flat tubes arranged at the position closest to the facing portion among the plurality of flat tubes, When the vector passing through the first end with the second end as the base point is defined as the second vector, the angle formed by the first vector and the second vector is less than 90 degrees.

In the outdoor unit of the present invention, a heat exchanger is arranged inside the housing in a radial direction with respect to the rotation axis of the axial blower. In the outdoor unit, the angle formed by the first vector and the second vector is less than 90 degrees. The first vector is a tangent line of the facing portion that is closest to the heat exchanger in the rotation circle drawn by the tip of the rotor blade, and is a vector in the rotation direction of the rotor blade. The second vector is a vector that passes through the first end of the first flat pipe, which is arranged at the position closest to the facing portion among the plurality of flat pipes, with the second end as a reference point. In the outdoor unit, since the angle formed by the first vector and the second vector is less than 90 degrees, the inflow of air passing through the heat exchanger due to the inclination of the first flat tube arranged closest to the rotor blades. The direction and the rotation direction of the axial blower are the same direction. As a result, in the outdoor unit and the refrigeration cycle apparatus including the outdoor unit, the relative velocity between the air having a high wind velocity flowing into the housing and the rotating blades becomes small, so that the ventilation resistance of the heat exchanger can be reduced. Noise can be suppressed.

FIG. 3 is a front perspective view of the outdoor unit according to Embodiment 1 of the present invention. It is a perspective view of the back direction of the outdoor unit concerning Embodiment 1 of the present invention. It is a schematic front view of the outdoor unit which concerns on Embodiment 1 of this invention. FIG. 4 is a cross-sectional view taken along the line AA of the outdoor unit shown in FIG. 3. FIG. 4 is an enlarged conceptual view of a flat tube and an axial blower in a B part of the outdoor unit shown in FIG. 3. It is a schematic front view of the outdoor unit which concerns on Embodiment 2 of this invention. FIG. 7 is an enlarged conceptual diagram of a flat tube and an axial flow blower in a B part of the outdoor unit shown in FIG. 6. It is a schematic sectional drawing of the outdoor unit which concerns on Embodiment 3 of this invention. It is a schematic sectional drawing of the outdoor unit which concerns on Embodiment 4 of this invention. It is a figure which shows the structure of the refrigerating-cycle apparatus which concerns on Embodiment 5 of this invention.

Hereinafter, the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, the outdoor unit 130, and the refrigeration cycle device 50 according to the present invention will be described in detail with reference to the drawings. In the drawings below, the relationship of the sizes of the respective constituent members may differ from the actual one. In addition, in the following drawings, the components denoted by the same reference numerals are the same or equivalent, and this is common to all the texts of the specification. Further, the forms of the constituent elements shown in the entire specification are merely examples, and the present invention is not limited to these descriptions. Further, in order to facilitate understanding, terms (eg, “upper”, “lower”, “right”, “left”, “front”, “rear”, etc.) indicating directions or positions are appropriately used. However, these notations are merely described as such for convenience of description, and do not limit the arrangement and orientation of the device or parts.

Embodiment 1.
FIG. 1 is a front perspective view of an outdoor unit 100 according to Embodiment 1 of the present invention. FIG. 2 is a rear perspective view of the outdoor unit 100 according to Embodiment 1 of the present invention. The outer shell of the outdoor unit 100 will be described with reference to FIGS. 1 and 2. The X axis shown in the following drawings including FIG. 1 indicates the left-right direction of the outdoor unit 100, the Y axis indicates the front-back direction of the outdoor unit 100, and the Z axis indicates the vertical direction of the outdoor unit 100. More specifically, when the outdoor unit 100 is viewed from the front, the X1 side is the left side, the X2 side is the right side, the Y1 side is the front side on the Y axis, the Y2 side is the rear side, the Z1 side is the upper side, and the Z2 side is the lower side on the Z axis. The outdoor unit 100 will be described as the side. In addition, the positional relationship (for example, the vertical relationship) between the constituent members in the specification is, in principle, when the outdoor unit 100 is installed in a usable state.

<Outdoor unit 100>
The outdoor unit 100 is used for a refrigeration cycle device used for refrigeration or air conditioning, such as a refrigerator or freezer, a vending machine, an air conditioner, a refrigerating device, and a water heater. The outdoor unit 100 has a housing 1. The housing 1 of the outdoor unit 100 constitutes an outer shell of the outdoor unit 100. The housing 1 is made of sheet metal and has a substantially rectangular parallelepiped shape as shown in FIG. As shown in FIGS. 1 and 2, the housing 1 is installed to face a front panel 1a having a circular outlet 1a1 and a front panel 1a, and covers a back surface of a machine room 4 described later. And a rear panel 1b. A fan guard 1g that covers the outlet 1a1 and protects the propeller fan 16 of the axial blower 12 is attached to the front panel 1a. A rectangular opening 1b1 is formed in the back panel 1b, and the heat exchanger 11 is arranged inside the housing 1 through the opening 1b1. In addition, the housing 1 includes a left side panel 1c provided on a side surface on the side of the blower chamber 3 and a right side panel 1d provided on a side surface on the side of the machine room 4, which will be described later when the housing 1 is viewed from the front. Have. The left side panel 1c is formed with an outside air inlet (not shown) for taking outside air into the blower chamber 3. Further, the housing 1 includes a front panel 1a, a rear panel 1b, a left side panel 1c, and a right side panel 1d, and a top panel 1e that covers an upper opening and a bottom plate 1f that covers the lower opening. Have. The top panel 1e covers the heat exchanger 11 and the axial blower 12 from above. Further, the bottom plate 1f is arranged below the heat exchanger 11 and the axial blower 12.

FIG. 3 is a schematic front view of the outdoor unit 100 according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view of the outdoor unit 100 shown in FIG. 3 taken along the line AA. Next, the internal configuration of the outdoor unit 100 will be described with reference to FIGS. 3 and 4. The white arrows shown in FIG. 3 indicate the flow of air formed by the axial blower 12. Air flows into the inside from the outside of the housing 1 through the outside air intake 1c1 formed in the left side panel 1c. As shown in FIGS. 3 and 4, the outdoor unit 100 includes a heat exchanger 11 and an axial blower 12. The outdoor unit 100 also has a compressor 13, as shown in FIG. 4. The outdoor unit 100 has a partition plate 2 that divides the inside of the housing 1 into a blower room 3 and a machine room 4. The partition plate 2 is provided inside the housing 1, is provided above the bottom plate 1f (Z-axis direction), and is provided in the front-back direction (Y-axis direction) of the bottom plate 1f. The partition plate 2 is formed by bending a sheet metal or the like, for example. The blower chamber 3 contains a heat exchanger 11 and an axial blower 12 arranged so as to face the heat exchanger 11, and the machine chamber 4 contains a compressor 13. The heat exchanger 11 and the compressor 13 are installed on the bottom plate 1f.

(Heat exchanger 11)
The heat exchanger 11 is arranged in the housing 1 and exchanges heat between the refrigerant flowing inside and the outside air. When the outdoor unit 100 is used in a refrigeration cycle device for air conditioning, the heat exchanger 11 functions as an evaporator during heating operation and a condenser during cooling operation. As shown in FIG. 4, the heat exchanger 11 according to the first embodiment is arranged so as to cover the rear (Y2 side) and the side (X1 side) of the axial blower 12 with respect to the bottom plate 1f. When viewed in the vertical direction, it is formed in an L shape. The heat exchanger 11 has a rear part 11b and a side part 11c. The rear portion 11b of the heat exchanger 11 faces the axial blower 12 inside the housing 1 and is arranged on the windward side of the axial blower 12 in the air flow formed by the axial blower 12. The side portion 11c of the heat exchanger 11 is arranged inside the housing 1 in the radial direction with respect to the rotation axis S1 of the axial blower 12. That is, the heat exchanger 11 is arranged beside the axial blower 12. That is, the heat exchanger 11 according to the first embodiment faces the axial blower 12 in the longitudinal direction (X-axis direction) and the lateral direction (Y-axis direction) of the outdoor unit 100 as described above, and at the same time, the axial blower. It is located on the windward side of 12. The heat exchanger 11 is not limited to the L-shaped configuration when viewed in a direction perpendicular to the bottom plate 1f, and may have a linear configuration, for example. Good. In this case, each of the plurality of linearly formed components is arranged so as to cover the rear and side of the axial blower 12, respectively. Further, the heat exchanger 11 may be formed in a U shape when viewed in a direction perpendicular to the bottom plate 1f. Further, the heat exchanger 11 may have only the side portion 11c.

The heat exchanger 11 has a plurality of fins 21 that are arranged in parallel at intervals and a plurality of flat tubes 22 that are orthogonal to the plurality of fins 21 and that are arranged at intervals in the vertical direction. The flat tube 22 is a heat transfer tube, and the refrigerant passes through the tube. Each of the plurality of flat tubes 22 is provided so as to extend in the horizontal direction (for example, the X-axis direction and the Y-axis direction). The fins 21 are provided to increase the heat transfer area between the refrigerant flowing through the flat tubes 22 and the outside air, and the air passes between the fins 21 adjacent to each other. 3 and 4, in the heat exchanger 11, the case where the plurality of flat tubes 22 are orthogonal to the fins 21 is illustrated, but the fins 21 may have other forms, and the fins 21 are provided. It does not have to be. The detailed configuration of the flat tube 22 will be described later.

(Axial blower 12)
Next, the axial blower 12 will be described with reference to FIGS. 3 and 4. The axial blower 12 is arranged inside the housing 1 and forms a flow of air passing through the inside of the housing 1 by a plurality of rotor blades 18 arranged in the radial direction with respect to the rotation axis S1. The axial blower 12 is a blower including a motor 15 and a propeller fan 16, and generates air circulation for efficiently exchanging heat between the refrigerant and air in the heat exchanger 11. The propeller fan 16 of the axial blower 12 has a hub portion 17 that is rotated around the axis and a plurality of rotating blades 18 that are radially provided on the outer peripheral portion of the hub portion 17. That is, the rotary blades 18 are provided radially with respect to the rotation axis S1. Although the axial flow fan 12 is provided with three rotary blades 18, the number of rotary blades 18 is not limited. The rotor blade 18 has a base portion 19b, which is a boundary portion between the tip portion 19a located at the tip in the radial direction and the front edge portion 19 of the rotor blade 18 located on the arrangement side of the heat exchanger 11, and the hub portion 17, Have. As shown in FIG. 4, the axial blower 12 is arranged inside the housing 1 on the side (X2 side) and front (Y1 side) of the heat exchanger 11. That is, the axial blower 12 faces the heat exchanger 11 in the longitudinal direction (X-axis direction) and the lateral direction (Y-axis direction) of the outdoor unit 100, and is leeward of the flow of air passing through the heat exchanger 11. It is located on the side.

In the axial blower 12, the rotor blades 18 of the propeller fan 16 rotate in the rotation direction R1, as shown in FIG. Here, the rotation direction R1 is a direction that rotates clockwise around the rotation axis S1 when the axial blower 12 is viewed from the front of the outdoor unit 100 in the axial direction of the rotation axis S1. In other words, the rotation direction R1 rotates so that the tip end portion 19a of the rotary blade 18 is located in the order of the bottom plate 1f side, the heat exchanger 11 side, the top panel 1e side, the machine room 4 side, and the bottom plate 1f side again. Direction. In the axial blower 12, the propeller fan 16 rotates to create a negative pressure between the heat exchanger 11 and the propeller fan 16, and the side surface (X1 side) and the rear surface side (Y2 side) of the housing 1 are used. Outside air is introduced into the housing 1. Then, the axial blower 12 discharges the outside air introduced into the outdoor unit 100 toward the front surface side (Y1 side) of the outdoor unit 100 by the rotation of the propeller fan 16. At this time, the axial blower 12 forms a flow of air passing through the heat exchanger 11. The relationship between the axial blower 12 and the flat tube 22 will be described later.

(Compressor 13)
The compressor 13 compresses the sucked refrigerant into a high-temperature high-pressure gas refrigerant and discharges it. The compressor 13 is, for example, a rotary type, scroll type, or vane type compressor. The compressor 13 may include an inverter device, and the inverter device may be configured to change the operating frequency to change the capacity of the compressor 13. The capacity of the compressor 13 is the amount of refrigerant sent out per unit time.

(Detailed configuration of the flat tube 22)
FIG. 5 is an enlarged conceptual diagram of the flat tubes 22 and the axial blower 12 in the B section of the outdoor unit 100 shown in FIG. Next, the detailed configuration of the flat tubes 22 in the heat exchanger 11 will be further described with reference to FIGS. 3 and 5. The cross-sectional shape of each of the plurality of flat tubes 22 is different from the first end portion 23 located on the arrangement side of the axial blower 12 and the wind of the air flow passing through the heat exchanger 11 with respect to the first end portion 23. It is a flat shape having a long axis LS passing through the second end portion 24 located on the upper side. In each of the plurality of flat tubes 22, the major axis LS passing through the first end 23 and the second end 24 is inclined in the same direction DR with respect to the virtual horizontal plane F. Note that the direction DR here is defined as a direction in which the major axis LS of the flat tube 22 is inclined with respect to the horizontal plane F at an angle of greater than 0 degrees and less than 90 degrees with respect to the horizontal plane F. The direction DR is a tilt direction and does not define an angle. Further, the long axis LS is continuous in the direction in which the tube of the flat tube 22 extends, and when the long axis LS is seen in the direction in which the tube of the flat tube 22 extends, the long axis LS is a plane in the flat tube 22. To form. Therefore, the direction DR can also be defined as a direction in which the plane formed by the long axis LS in the extending direction of the flat tube 22 is inclined with respect to the horizontal plane F. The inclination in the same direction DR is defined as that the major axes LS of the plurality of flat tubes 22 are inclined to the same side with respect to the horizontal plane F in the vertical direction. That is, the term “inclined in the same direction” here means that the surfaces formed by the long axes LS of the plurality of flat tubes 22 in the extending direction of the flat tubes 22 are the same side with respect to the horizontal plane F in the vertical direction. Is defined as leaning toward. In the heat exchanger 11 of the first embodiment, the flat tube 22 is inclined such that the first end 23 of the long axis LS is located above the second end 24.

Here, the virtual horizontal plane F passing through the second end 24 of the flat tube 22 is defined as the first virtual horizontal plane F1. In each of the plurality of flat tubes 22 of the first embodiment, the inclination angle α of the long axis LS with respect to the first virtual horizontal plane F1 is the same. That is, when the surface formed by the long axis LS of the flat tube 22 in the extending direction of the flat tube 22 is the inclination angle α with respect to the first virtual horizontal plane F1, each of the plurality of flat tubes 22 has The inclination angles α are the same. However, each of the plurality of flat tubes 22 is not limited to the same inclination angle α of the long axis LS. In each of the plurality of flat tubes 22, if the long axis LS passing through the first end portion 23 and the second end portion 24 is inclined in the same direction with respect to the first virtual horizontal plane F1, the respective long axes LS of The inclination angles α may be different. As in the first embodiment, in the plurality of flat tubes 22, when the inclination angle α of the long axis LS is the same, it is not necessary to adjust the inclination angle α of the long axis LS, and therefore the outdoor unit 100. Can be manufactured with a simpler structure and method.

(Relationship between the flat tube 22 and the axial blower 12)
Next, the relationship between the flat tube 22 and the axial blower 12 will be described with reference to FIGS. 3 and 5. First, when the axial blower 12 is viewed in the direction of the rotation axis S1 of the axial blower 12 while the axial blower 12 is operating, the rotation of the rotary blade 18 causes the tip portion 19a of the rotary blade 18 to rotate. The circle is defined as a rotating circle C1. Next, when the outdoor unit 100 is viewed in the direction of the rotation axis S1 of the axial blower 12, the position closest to the heat exchanger 11 in the rotation circle C1 is defined as the facing portion P1. Next, a vector that is a tangent to the facing portion P1 in the rotation circle C1 and that is in the rotation direction R1 of the rotary blade 18 is defined as a first vector L1. Next, when the heat exchanger 11 is viewed in the direction of the rotation axis S1 of the axial blower 12, the flat tube 22 arranged closest to the facing portion P1 among the plurality of flat tubes 22 is the first flat tube. 22a. Then, a vector passing through the first end portion 23 with the second end portion 24 of the first flat tube 22a as a base point is defined as a second vector L2. In the outdoor unit 100, the angle θ formed by the first vector L1 and the second vector L2 is less than 90 degrees when viewed in the rotation axis S1 direction of the axial blower 12. When the virtual horizontal plane passing through the rotation axis S1 is defined as the second virtual horizontal plane F2, the facing portion P1 can also be defined as the point where the second virtual horizontal plane F2 and the rotation circle C1 are in contact with each other. The angle θ is an angle formed by the first vector L1 and the second vector L2. When the outdoor unit 100 is viewed in the direction of the rotation axis S1 of the axial blower 12, the angle θ is between the heat exchanger 11 and the axial blower 12 with respect to the first vector L1 on the axial blower 12 side. Is the angle. When the outdoor unit 100 is viewed in the direction of the rotation axis S1 of the axial blower 12, the angle θ is the angle between the top panel 1e and the bottom plate 1f on the top panel 1e side with respect to the second vector L2. Is.

In other words, the long axis LS of the first flat tube 22a is inclined toward the rotation direction R1 of the rotary blade 18. More specifically, as shown in FIG. 5, the long axis LS of the first flat tube 22a is inclined so that the first end portion 23 is located above the second end portion 24 in the vertical direction. There is. Further, in the axial blower 12, as shown in FIG. 3, the rotation direction in which the rotary blades 18 are adjacent to the heat exchanger 11, adjacent to the top panel 1e, and adjacent to the bottom plate 1f. Rotate to R1.

Also, consider the flat tube 22b arranged above or below the first flat tube 22a and at a position facing the first flat tube 22a. The long axis LS of the flat tube 22b may be inclined with respect to the first virtual horizontal plane F1 in the same direction DR as the long axis LS of the first flat tube 22a is inclined with respect to the first virtual horizontal plane F1. .. Further, the long axis LS of the flat tube 22b arranged above or below the first flat tube 22a and at a position facing the first flat tube 22a has a first axis with respect to the first virtual horizontal plane F1. The long axis LS of the flat tube 22a may be inclined at the same angle as the inclination angle α with respect to the first virtual horizontal plane F1.

Further, the respective long axes LS of the plurality of flat tubes 22 are inclined with respect to the first virtual horizontal plane F1 in the same direction as the long axis LS of the first flat tubes 22a is inclined with respect to the first virtual horizontal plane F1. You may. Moreover, the long axis LS of each of the plurality of flat tubes 22 is inclined at the same angle as the tilt angle α with respect to the first virtual horizontal plane F1 with respect to the first virtual horizontal plane F1. Good.

(Operation of the outdoor unit 100)
Next, the flow of air in the outdoor unit 100 will be described. First, in the outdoor unit 100, the space between the axial blower 12 and the heat exchanger 11 in the blower chamber 3 is in a negative pressure state due to the operation of the axial blower 12. Then, the outdoor unit 100 has a housing through the opening 1b1 and the outside air intake 1c1 formed in the housing 1 when the space between the axial blower 12 and the heat exchanger 11 is in a negative pressure state. Air flows into the housing 1 from outside 1. The inflowing air passes between the

fins

21 and 21 adjacent to each other in the heat exchanger 11, and also passes between the adjacent flat tubes 22 to pass through the heat exchanger 11. To do. At this time, in the heat exchanger 11, heat is exchanged between the air flowing into the housing 1 by the axial blower 12 and the refrigerant flowing inside the flat tube 22. In the heat exchanger 11, the air that has exchanged heat with the refrigerant flowing inside the flat tube 22 is discharged to the outside of the housing 1 by the axial blower 12.

As described above, in the outdoor unit 100, the heat exchanger 11 is arranged inside the housing 1 in the radial direction with respect to the rotation axis S1 of the axial blower 12. In the outdoor unit 100, the angle θ formed by the first vector L1 and the second vector L2 is less than 90 degrees. The first vector L1 is a tangent line of the facing portion P1 that is closest to the heat exchanger 11 in the rotation circle C1 drawn by the tip end portion 19a of the rotary blade 18, and is a vector in the rotation direction R1 of the rotary blade 18. is there. In addition, the second vector L2 passes through the first end portion 23 with the second end portion 24 as a base point in the first flat pipe 22a arranged at the position closest to the facing portion P1 among the plurality of flat pipes 22. Is a vector. In the outdoor unit 100, since the angle θ formed by the first vector L1 and the second vector L2 is less than 90 degrees, the heat exchanger is accompanied by the inclination of the first flat tubes 22a arranged closest to the rotor blades 18. The inflow direction of the air passing through 11 and the rotation direction R1 of the axial blower 12 are the same direction. As a result, in the outdoor unit 100, since the relative speed between the air having a high wind speed flowing into the housing 1 and the rotary blades 18 becomes small, the ventilation resistance of the heat exchanger 11 can be reduced and the noise can be suppressed. .. Further, the outdoor unit 100 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 100.

Further, the long axis LS of the first flat tube 22a is inclined toward the rotation direction R1 of the rotary blade 18. As a result, in the outdoor unit 100, since the relative speed between the air having a high wind speed flowing into the housing 1 and the rotary blades 18 becomes small, the ventilation resistance of the heat exchanger 11 can be reduced and the noise can be suppressed. .. Further, the outdoor unit 100 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 100.

Further, the major axis LS of the first flat tube 22a is inclined such that the first end portion 23 is located above the second end portion 24 in the vertical direction. Then, in the axial blower 12, the rotating blades 18 rotate in the rotation direction R1 in the order of the position adjacent to the heat exchanger 11, the position adjacent to the top panel 1e, and the position adjacent to the bottom plate 1f. Therefore, in the outdoor unit 100, the inflow direction of the air passing through the heat exchanger 11 due to the inclination of the first flat tube 22a arranged closest to the rotary blades 18 and the rotation direction R1 of the axial blower 12 are different. In the same direction. As a result, in the outdoor unit 100, since the relative speed between the air having a high wind speed flowing into the housing 1 and the rotary blades 18 becomes small, the ventilation resistance of the heat exchanger 11 can be reduced and the noise can be suppressed. .. Further, the outdoor unit 100 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 100.

Further, the long axis LS of the flat tube 22b arranged above or below the first flat tube 22a and at a position facing the first flat tube 22a has a first axis with respect to the first virtual horizontal plane F1. The long axis LS of the flat tube 22a is inclined in the same direction as the direction DR inclined with respect to the first virtual horizontal plane F1. The outdoor unit 100 can further specify the inflow direction of air by forming a flow path of air with the first flat tubes 22a by the plurality of flat tubes 22b adjacent to the first flat tubes 22a. As a result, in the outdoor unit 100, the relative velocity between the air having a high wind velocity flowing into the housing 1 and the rotary blades 18 is further reduced, so that the ventilation resistance of the heat exchanger 11 can be reduced and noise can be suppressed. it can.

Further, the long axis LS of the flat tube 22b arranged above or below the first flat tube 22a and at a position facing the first flat tube 22a has a first axis with respect to the first virtual horizontal plane F1. The long axis LS of the flat tube 22a is inclined at the same angle as the inclination angle α with respect to the first virtual horizontal plane F1. In the outdoor unit 100, the plurality of flat tubes 22b adjacent to the first flat tubes 22a and the first flat tubes 22a are inclined at the same angle to form an air flow path, thereby further identifying the inflow direction of air. can do. As a result, in the outdoor unit 100, the relative velocity between the air having a high wind velocity flowing into the housing 1 and the rotary blades 18 is further reduced, so that the ventilation resistance of the heat exchanger 11 can be reduced and noise can be suppressed. it can.

Further, the respective long axes LS of the plurality of flat tubes 22 are in the same direction as the direction DR in which the long axes LS of the first flat tubes 22a are inclined with respect to the first virtual horizontal plane F1 with respect to the first virtual horizontal plane F1. It is inclined. Therefore, when performing the defrosting operation for the frost formation of the heat exchanger 11, the outdoor unit 100 can quickly drain the defrosted water in the direction in which the major axis LS faces downward, which is required for defrosting. The time can be shortened.

Further, the long axis LS of each of the plurality of flat tubes 22 of the first embodiment is the same as the inclination angle α with respect to the first virtual horizontal plane F1 with respect to the first virtual tube F1. It is inclined at an angle. Therefore, the outdoor unit 100 does not need to adjust the inclination angle α of the long axis LS for each flat tube 22, so that the outdoor unit 100 can be manufactured with a simple structure.

Embodiment 2.
FIG. 6 is a schematic front view of the outdoor unit 110 according to Embodiment 2 of the present invention. FIG. 7 is an enlarged conceptual diagram of the flat tube 22 and the axial blower 12 in the B section of the outdoor unit 110 shown in FIG. The outdoor unit 110 is used for a refrigeration cycle device used for refrigeration or air conditioning, such as a refrigerator or a freezer, a vending machine, an air conditioner, a refrigerating device, and a water heater. The outdoor unit 110 according to the second embodiment is different from the outdoor unit 100 according to the first embodiment in the installation angle of the flat tubes 22 and the rotation direction of the axial blower 12. Portions having the same configuration as the outdoor unit 100 of FIGS. 1 to 5 are designated by the same reference numerals and the description thereof will be omitted. Items that are not particularly described in the outdoor unit 110 according to the second embodiment are similar to those of the outdoor unit 100 according to the first embodiment of the invention, and the same functions and configurations will be described using the same reference numerals.

(Axial blower 12)
In the axial blower 12, as shown in FIGS. 6 and 7, the rotating blades 18 of the propeller fan 16 rotate in the rotation direction R2. Here, the rotation direction R2 is a direction that rotates counterclockwise around the rotation axis S1 when the axial blower 12 is viewed from the front of the outdoor unit 100 in the axial direction of the rotation axis S1. In other words, the rotation direction R2 rotates so that the tip end portion 19a of the rotary blade 18 is located in the order of the bottom plate 1f side, the machine room 4 side, the top panel 1e side, the heat exchanger 11 side, and the bottom plate 1f side again. Direction.

(Detailed configuration of the flat tube 22)
Next, the detailed configuration of the flat tubes 22 in the heat exchanger 11 will be described with reference to FIGS. 6 and 7. In the heat exchanger 11 of the second embodiment, the flat tube 22 is inclined such that the first end 23 of the long axis LS is located below the second end 24.

(Relationship between the flat tube 22 and the axial blower 12)
Next, the relationship between the flat tube 22 and the axial blower 12 will be described with reference to FIGS. 6 and 7. First, when the axial blower 12 is viewed in the direction of the rotation axis S1 of the axial blower 12 while the axial blower 12 is operating, the rotation of the rotary blade 18 causes the tip portion 19a of the rotary blade 18 to rotate. The circle is defined as a rotating circle C1. Next, when the outdoor unit 110 is viewed in the direction of the rotation axis S1 of the axial blower 12, the position closest to the heat exchanger 11 in the rotation circle C1 is defined as the facing portion P1. Next, a vector that is a tangent to the facing portion P1 in the rotation circle C1 and that is in the rotation direction R2 of the rotary blade 18 is defined as a first vector L3. Next, when the heat exchanger 11 is viewed in the direction of the rotation axis S1 of the axial blower 12, the flat tube 22 arranged closest to the facing portion P1 among the plurality of flat tubes 22 is the first flat tube. 22a. Then, a vector passing through the first end 23 with the second end 24 of the first flat tube 22a as a base point is defined as a second vector L4. In the outdoor unit 110, the angle θ2 formed by the first vector L3 and the second vector L4 is less than 90 degrees when viewed in the rotation axis S1 direction of the axial blower 12. When the virtual horizontal plane passing through the rotation axis S1 is defined as the second virtual horizontal plane F2, the facing portion P1 may be defined as the point where the second virtual horizontal plane F2 and the rotation circle C1 are in contact with each other. The angle θ2 is an angle formed by the first vector L3 and the second vector L4. When the outdoor unit 110 is viewed in the direction of the rotation axis S1 of the axial blower 12, the angle θ2 is between the heat exchanger 11 and the axial blower 12 with respect to the first vector L3 on the axial blower 12 side. Is the angle. Further, when the outdoor unit 110 is viewed in the direction of the rotation axis S1 of the axial blower 12, the angle θ2 is the angle between the top panel 1e and the bottom plate 1f on the bottom plate 1f side with respect to the second vector L4. ..

In other words, the long axis LS of the first flat tube 22a is inclined toward the rotation direction R2 of the rotary blade 18. More specifically, as shown in FIG. 7, the long axis LS of the first flat tube 22a is inclined so that the first end portion 23 is located below the second end portion 24 in the vertical direction. ing. Further, in the axial blower 12, as shown in FIG. 6, the rotation direction in which the rotary blade 18 is in the order of a position adjacent to the top panel 1e, a position adjacent to the heat exchanger 11, and a position adjacent to the bottom plate 1f. Rotate to R2.

As described above, in the outdoor unit 110, the heat exchanger 11 is arranged inside the housing 1 in the radial direction with respect to the rotation axis S1 of the axial blower 12. In the outdoor unit 110, the angle θ2 formed by the first vector L3 and the second vector L4 is less than 90 degrees. The first vector L3 is a tangent line of the facing portion P1 that is closest to the heat exchanger 11 in the rotation circle C1 drawn by the tip end portion 19a of the rotary blade 18, and is a vector in the rotation direction R2 of the rotary blade 18. is there. In addition, the second vector L4 passes through the first end portion 23 with the second end portion 24 as a reference point in the first flat pipe 22a arranged at the position closest to the facing portion P1 among the plurality of flat pipes 22. Is a vector. In the outdoor unit 110, since the angle θ2 formed by the first vector L3 and the second vector L4 is less than 90 degrees, the heat exchanger is accompanied by the inclination of the first flat tubes 22a arranged closest to the rotor blades 18. The inflow direction of the air passing through 11 and the rotation direction R2 of the axial blower 12 are the same direction. As a result, in the outdoor unit 110, the relative speed between the air having a high wind speed flowing into the housing 1 and the rotary blades 18 becomes small, so that the ventilation resistance of the heat exchanger 11 can be reduced and noise can be suppressed. .. Further, the outdoor unit 110 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 110.

Further, the long axis LS of the first flat tube 22a is inclined toward the rotation direction R2 of the rotary blade 18. As a result, in the outdoor unit 100, since the relative speed between the air having a high wind speed flowing into the housing 1 and the rotary blades 18 becomes small, the ventilation resistance of the heat exchanger 11 can be reduced and the noise can be suppressed. .. Further, the outdoor unit 100 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 100.

Further, the major axis LS of the first flat tube 22a is inclined so that the first end portion 23 is located below the second end portion 24 in the vertical direction. Then, in the axial blower 12, the rotary blades 18 rotate in the rotation direction R2 in the order of the position adjacent to the top panel 1e, the position adjacent to the heat exchanger 11, and the position adjacent to the bottom plate 1f. Therefore, in the outdoor unit 110, the inflow direction of the air passing through the heat exchanger 11 according to the inclination of the first flat tube 22a arranged closest to the rotary blades 18 and the rotation direction R2 of the axial blower 12 are determined. In the same direction. As a result, in the outdoor unit 110, the relative speed between the air having a high wind speed flowing into the housing 1 and the rotary blades 18 becomes small, so that the ventilation resistance of the heat exchanger 11 can be reduced and noise can be suppressed. .. Further, the outdoor unit 110 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 110.

Further, the long axis LS of the flat tube 22 arranged above or below the first flat tube 22a and at a position facing the first flat tube 22a has a first axis with respect to the first virtual horizontal plane F1. The long axis LS of the flat tube 22a is inclined in the same direction as the direction DR inclined with respect to the first virtual horizontal plane F1. The outdoor unit 110 can further specify the inflow direction of air by forming a flow path of air with the first flat tubes 22a by the plurality of flat tubes 22 adjacent to the first flat tubes 22a. As a result, in the outdoor unit 110, the relative velocity between the air having a high wind velocity flowing into the housing 1 and the rotary blades 18 is further reduced, so that the ventilation resistance of the heat exchanger 11 can be reduced and noise can be suppressed. it can.

Further, the long axis LS of the flat tube 22 arranged above or below the first flat tube 22a and at a position facing the first flat tube 22a has a first axis with respect to the first virtual horizontal plane F1. The long axis LS of the flat tube 22a is inclined at the same angle as the inclination angle α with respect to the first virtual horizontal plane F1. In the outdoor unit 110, the plurality of flat tubes 22 adjacent to the first flat tubes 22a and the first flat tubes 22a are inclined at the same angle to form an air flow path together, thereby further identifying the inflow direction of air. can do. As a result, in the outdoor unit 110, the relative velocity between the air having a high wind velocity flowing into the housing 1 and the rotary blades 18 is further reduced, so that the ventilation resistance of the heat exchanger 11 can be reduced and noise can be suppressed. it can.

Further, the respective long axes LS of the plurality of flat tubes 22 are in the same direction as the direction DR in which the long axes LS of the first flat tubes 22a are inclined with respect to the first virtual horizontal plane F1 with respect to the first virtual horizontal plane F1. It is inclined. Therefore, when performing the defrosting operation for the frost formation of the heat exchanger 11, the outdoor unit 110 can quickly drain the defrosted water in the direction in which the long axis LS faces downward, which is required for defrosting. The time can be shortened.

Moreover, the long axis LS of each of the plurality of flat tubes 22 is inclined at the same angle as the tilt angle α with respect to the first virtual horizontal plane F1 with respect to the first virtual horizontal plane F1. There is. Therefore, the outdoor unit 110 does not need to adjust the inclination angle α of the long axis LS for each flat tube 22, so that the outdoor unit 110 can be manufactured with a simple structure.

Embodiment 3.
<Outdoor unit 120>
FIG. 8 is a schematic cross-sectional view of the outdoor unit 120 according to Embodiment 3 of the present invention. The outdoor unit 120 is used for a refrigeration cycle device used for refrigeration or air conditioning, such as a refrigerator or freezer, a vending machine, an air conditioner, a refrigerating device, and a water heater. In the outdoor unit 100 according to the first embodiment, all the heat transfer tubes are composed of the flat tubes 22, whereas in the outdoor unit 120 according to the third embodiment, a circular tube 22c is included in a part of the heat transfer tubes. The difference is. The configuration of the outdoor unit 120 according to the third embodiment is different only in the configuration of the heat transfer tube from the outdoor unit 100 according to the first embodiment, and the other configurations are the same as the outdoor unit 100 according to the first embodiment. .. Portions having the same configurations as the outdoor unit 100 and the outdoor unit 110 of FIGS. Items that are not particularly described in the outdoor unit 120 according to the third embodiment are the same as those in the outdoor unit 100 according to the first embodiment of the invention, and the same functions and configurations will be described using the same reference numerals.

The heat exchanger 111 is arranged in the housing 1 and exchanges heat between the refrigerant flowing inside and the outside air. When the outdoor unit 120 is used in a refrigeration cycle device for air conditioning, the heat exchanger 111 functions as an evaporator during heating operation and a condenser during cooling operation. The heat exchanger 111 faces the axial blower 12 inside the housing 1, and is arranged on the windward side of the axial blower 12 in the flow of air formed by the axial blower 12. The heat exchanger 111 has a plurality of fins 21 arranged in parallel at intervals and a plurality of flat tubes 22 orthogonal to the plurality of fins 21 and arranged at intervals in the vertical direction. The heat exchanger 111 further includes at least one circular pipe 22c which is orthogonal to the fins 21 and through which the refrigerant flows. The heat exchanger 111 is different from the heat exchanger 11 in which all of the heat transfer tubes are formed of the flat tubes 22 in that a circular tube 22c is provided in a part of the heat transfer tubes, and the other configurations are heat exchange. It is the same as the container 11. The number of the circular tubes 22c may be one or more. Further, the circular pipe 22c is generally arranged on the lower end 11a side of the heat exchanger 111, but the circular pipe 22c may be arranged at any position in the vertical direction of the heat exchanger 111.

As described above, the heat exchanger 111 further includes at least one circular pipe 22c in which the refrigerant flows. In general, the flat tube 22 may have difficulty in flowing the refrigerant because the tube forming the inside thereof has a reduced diameter. However, in the heat exchanger 111, there is a case where a part of the heat exchanger 111 as a whole is required to pass the refrigerant easily. Since the heat exchanger 111 has at least one circular pipe 22c, it can form a portion through which the refrigerant easily passes. Further, since the outdoor unit 110 has the configuration of the flat tube 22 and the axial blower 12 like the outdoor unit 100 according to the first embodiment, the outdoor unit 110 can reduce ventilation resistance and suppress noise.

Fourth Embodiment
<Outdoor unit 130>
FIG. 9 is a schematic cross-sectional view of the outdoor unit 130 according to Embodiment 4 of the present invention. The outdoor unit 130 is used for a refrigeration cycle device used for refrigeration or air conditioning such as a refrigerator or freezer, a vending machine, an air conditioner, a refrigerating device, and a water heater. The outdoor unit 130 according to the fourth embodiment is different only in the configuration of the heat exchanger 112 from the configuration of the heat exchanger 11 of the outdoor unit 100 according to the first embodiment, and other configurations are the same as those of the first embodiment. It is the same as the outdoor unit 100. Parts having the same configurations as those of the outdoor unit 100, the outdoor unit 110 or the outdoor unit 120 of FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof will be omitted. Items that are not particularly described in the outdoor unit 130 according to Embodiment 4 are the same as those in the outdoor unit 100, the outdoor unit 110, or the outdoor unit 120, and the same functions and configurations will be described using the same reference numerals.

The outdoor unit 130 has the heat exchanger 112. The heat exchanger 112 has a linearly formed first heat exchanger 112a and a linearly formed second heat exchanger 112b when viewed in a direction perpendicular to the bottom plate 1f. The first heat exchanger 112a is arranged in the radial direction with respect to the rotation axis S1 of the axial blower 12, and is arranged laterally (X1 side) of the axial blower 12. The second heat exchanger 112b is arranged upstream of the flow of air formed by the axial blower 12 with respect to the axial blower 12, and is arranged behind the axial blower 12 (on the Y2 side). .. In the heat exchanger 112, the first heat exchanger 112a and the second heat exchanger 112b are connected by a pipe 112c. The first heat exchanger 112a and the second heat exchanger 112b each have a flat tube 22. The relationship between the flat tubes 22 of the outdoor unit 130 and the axial blower 12 is the same as the relationship between the flat tubes 22 of the outdoor unit 100, the outdoor unit 110, or the outdoor unit 120 and the axial blower 12.

As described above, the outdoor unit 130 has the heat exchanger 112. And the heat exchanger 112 has the linearly formed 1st heat exchanger 112a and the linearly formed 2nd heat exchanger 112b, when it sees in the perpendicular direction with respect to the bottom plate 1f. .. Therefore, the outdoor unit 130 does not need to bend the flat tube 22 when viewed in the direction perpendicular to the bottom plate 1f, and can be configured with a simple structure.

Embodiment 5.
[Refrigeration cycle device 50]
FIG. 10: is a figure which shows the structure of the refrigerating-cycle apparatus 50 which concerns on Embodiment 5 of this invention. As the outdoor unit 150 of the refrigeration cycle device 50 according to the fifth embodiment, the outdoor unit 100, the outdoor unit 110, the outdoor unit 120 or the outdoor unit 130 according to the first to third embodiments is used. Further, in the following description, the refrigeration cycle device 50 is described as being used for air conditioning purposes, but the refrigeration cycle device 50 is not limited to being used for air conditioning purposes. The refrigeration cycle device 50 is used for refrigerating or air conditioning applications such as a refrigerator or a freezer, a vending machine, an air conditioner, a refrigerating device, and a water heater.

The refrigeration cycle device 50 according to the fifth embodiment heats or cools the room to perform air conditioning by transferring heat between the outside air and the room air via the refrigerant. The refrigeration cycle device 50 includes an outdoor unit 150 and an indoor unit 200. In the refrigeration cycle device 50, the outdoor unit 150 and the indoor unit 200 are connected by a refrigerant pipe 300 and a refrigerant pipe 400 to form a refrigerant circuit in which a refrigerant circulates. The refrigerant pipe 300 is a gas pipe through which a vapor-phase refrigerant flows, and the refrigerant pipe 400 is a liquid pipe through which a liquid-phase refrigerant flows. Note that a gas-liquid two-phase refrigerant may flow through the refrigerant pipe 400. In the refrigerant circuit of the refrigeration cycle device 50, the compressor 101, the flow path switching device 102, the outdoor heat exchanger 103, the expansion valve 105, and the indoor heat exchanger 201 are sequentially connected via the refrigerant pipe.

(Outdoor unit 150)
The outdoor unit 150 includes a compressor 101, a flow path switching device 102, an outdoor heat exchanger 103, and an expansion valve 105. The compressor 101 compresses the drawn refrigerant and discharges it. As the compressor 101, the compressor 13 or the like used in the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, the outdoor unit 130, or the like of the first to third embodiments described above is used. Here, the compressor 101 may include an inverter device, and the inverter device may change the operating frequency to change the capacity of the compressor 101. The flow path switching device 102 is, for example, a four-way valve, and is a device that switches the direction of the refrigerant flow path. The refrigeration cycle device 50 can realize the heating operation or the cooling operation by switching the flow of the refrigerant using the flow path switching device 102 based on an instruction from a control device (not shown).

The outdoor heat exchanger 103 exchanges heat between the refrigerant and the outdoor air. The outdoor heat exchanger 103 of the refrigeration cycle apparatus 50 includes the heat exchanger 11 and the heat exchanger used in the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, or the outdoor unit 130 of the first to third embodiments described above. 111 or heat exchanger 112 etc. are used. The outdoor heat exchanger 103 functions as an evaporator during heating operation, and performs heat exchange between the low-pressure refrigerant flowing from the refrigerant pipe 400 and the outdoor air to evaporate and evaporate the refrigerant. During the cooling operation, the outdoor heat exchanger 103 functions as a condenser, and performs heat exchange between the refrigerant that has been compressed by the compressor 101 that has flowed in from the flow path switching device 102 side and the outdoor air, and removes the refrigerant. Condensate and liquefy. The outdoor heat exchanger 103 is provided with an outdoor blower 104 in order to improve the efficiency of heat exchange between the refrigerant and the outdoor air. As the outdoor blower 104, the axial blower 12 or the like used in the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, the outdoor unit 130, or the like of the first to third embodiments described above is used. The outdoor blower 104 may be equipped with an inverter device to change the operating frequency of the fan motor to change the rotation speed of the fan. The expansion valve 105 is an expansion device (flow rate control means), and functions as an expansion valve by adjusting the flow rate of the refrigerant flowing through the expansion valve 105, and adjusts the pressure of the refrigerant by changing the opening. For example, when the expansion valve 105 is composed of an electronic expansion valve or the like, the opening degree is adjusted based on an instruction from a control device (not shown) or the like.

(Indoor unit 200)
The indoor unit 200 has an indoor heat exchanger 201 that performs heat exchange between the refrigerant and indoor air, and an indoor blower 202 that adjusts the flow of air through which the indoor heat exchanger 201 performs heat exchange. The indoor heat exchanger 201 acts as a condenser during the heating operation, and performs heat exchange between the refrigerant flowing from the refrigerant pipe 300 and the indoor air to condense and liquefy the refrigerant, and to the refrigerant pipe 400 side. Drain. The indoor heat exchanger 201 functions as an evaporator during cooling operation, performs heat exchange between the refrigerant that has been brought to a low pressure state by the expansion valve 105 and indoor air, and causes the refrigerant to deprive the heat of the air to evaporate. To vaporize and flow out to the refrigerant pipe 300 side. The indoor blower 202 is provided so as to face the indoor heat exchanger 201. The operation speed of the indoor blower 202 is determined by the user setting. An inverter device may be attached to the indoor blower 202 to change the operating frequency of the fan motor to change the rotation speed.

[Operation Example of Refrigeration Cycle Device 50]
Next, a cooling operation operation will be described as an operation example of the refrigeration cycle apparatus 50. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 101 flows into the outdoor heat exchanger 103 via the flow path switching device 102. The gas refrigerant flowing into the outdoor heat exchanger 103 is condensed by heat exchange with the outside air blown by the outdoor blower 104, becomes a low-temperature refrigerant, and flows out from the outdoor heat exchanger 103. The refrigerant flowing out of the outdoor heat exchanger 103 is expanded and decompressed by the expansion valve 105 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the indoor heat exchanger 201 of the indoor unit 200, evaporates by heat exchange with the indoor air blown by the indoor blower 202, and becomes a low-temperature low-pressure gas refrigerant to become the indoor heat exchanger. It flows out from 201. At this time, the indoor air cooled by the heat absorbed by the refrigerant becomes blown-out air of the conditioned air, and is blown out from the outlet of the indoor unit 200 to the air-conditioned space. The gas refrigerant flowing out from the indoor heat exchanger 201 is sucked into the compressor 101 via the flow path switching device 102 and is compressed again. The above operation is repeated.

Next, a heating operation operation will be described as an operation example of the refrigeration cycle apparatus 50. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 101 flows into the indoor heat exchanger 201 of the indoor unit 200 via the flow path switching device 102. The gas refrigerant flowing into the indoor heat exchanger 201 is condensed by heat exchange with the indoor air blown by the indoor blower 202, becomes a low-temperature refrigerant, and flows out from the indoor heat exchanger 201. At this time, the indoor air that has been heated by receiving heat from the gas refrigerant becomes the blast air of the conditioned air, and is blown from the outlet of the indoor unit 200 to the air-conditioned space. The refrigerant flowing out from the indoor heat exchanger 201 is expanded and decompressed by the expansion valve 105 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 103 of the outdoor unit 150, evaporates by heat exchange with the outside air blown by the outdoor blower 104, and becomes a low-temperature low-pressure gas refrigerant to become the outdoor heat exchanger 103. Drained from. The gas refrigerant flowing out of the outdoor heat exchanger 103 is sucked into the compressor 101 via the flow path switching device 102 and is compressed again. The above operation is repeated.

Since the refrigeration cycle device 50 according to the fifth embodiment includes the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, or the outdoor unit 130 according to the first to fourth embodiments, the ventilation resistance of the heat exchanger 11 can be reduced. Can be suppressed. Further, the outdoor unit 110 can reduce the ventilation resistance, and thus can reduce the output required by the outdoor unit 110.

The embodiment of the present invention is not limited to the above-described first to fifth embodiments, and various modifications can be added. For example, the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, or the outdoor unit 130 includes one axial blower 12, but may include a plurality of axial blowers 12. Further, the outdoor unit 100, the outdoor unit 110, the outdoor unit 120, or the outdoor unit 130 is, for example, a plurality of heat exchangers 11 arranged in the direction of gravity and a plurality of axial blowers 12 facing the plurality of heat exchangers 11. And may be included. Further, each of the plurality of flat tubes 22 is not limited to one in which the major axis LS passing through the first end portion 23 and the second end portion 24 is inclined in the same direction DR with respect to the virtual horizontal plane F. Each of the plurality of flat tubes 22 may be inclined in different directions with respect to the virtual horizontal plane F, with the long axis LS passing through the first end 23 and the second end 24.

1 housing, 1a front panel, 1a1 outlet, 1b rear panel, 1b1 opening, 1c left side panel, 1c1 outside air intake, 1d right side panel, 1e top panel, 1f bottom plate, 1g fan guard, 2 partition plates 3, blower room, 4 machine room, 11 heat exchanger, 11a lower end, 11b rear part, 11c lateral part, 12 axial blower, 13 compressor, 15 motor, 16 propeller fan, 17 hub part, 18 rotor blades , 19 front edge, 19a tip, 19b base, 21 fin, 22 flat tube, 22a first flat tube, 22b flat tube, 22c circular tube, 23 first end, 24 second end, 50 refrigeration cycle device , 100 outdoor unit, 101 compressor, 102 flow path switching device, 103 outdoor heat exchanger, 104 outdoor blower, 105 expansion valve, 110 outdoor unit, 111 heat exchanger, 112 heat exchanger, 112a first heat exchanger, 112b second heat exchanger, 112c piping, 120 outdoor unit, 130 outdoor unit, 150 outdoor unit, 200 indoor unit, 201 indoor heat exchanger, 202 indoor blower, 300 refrigerant pipe, 400 refrigerant pipe.

Claims

Housing and
An axial blower that is disposed inside the housing and that forms a flow of air passing through the housing by a plurality of rotating blades that are arranged in a radial direction with respect to a virtual rotation axis,
It has a plurality of flat tubes arranged at intervals in the up-and-down direction, is arranged in the housing in a radial direction with respect to the rotation axis of the axial blower, and forms the axial blower. A heat exchanger arranged on the windward side of the axial blower in the flow of air,
Equipped with
Each of the plurality of flat tubes,
A length passing through a first end located on the arrangement side of the axial blower and a second end located on the windward side of the flow of air passing through the heat exchanger with respect to the first end. It has a flat shape with a shaft,
In the rotation circle drawn by the tip of the rotary blade, the tangent line of the facing portion that is closest to the heat exchanger, the vector in the rotation direction of the rotary blade is defined as a first vector,
A case where a vector passing through the first end with the second end as a base point is defined as a second vector in the first flat pipe arranged at a position closest to the facing part among the plurality of flat pipes And an outdoor unit in which the angle formed by the first vector and the second vector is less than 90 degrees.
The long axis of the first flat tube is
The outdoor unit according to claim 1, wherein the outdoor unit is inclined toward a rotation direction of the rotary blade.
The housing is
A top panel that covers the heat exchanger and the upper part of the axial blower;
A bottom plate arranged below the heat exchanger and the axial blower,
Have
The long axis of the first flat tube is
The first end portion is inclined so as to be located above the second end portion in the vertical direction,
The axial blower is
The outdoor unit according to claim 1 or 2, wherein the rotary blade rotates in a rotation direction in which a position adjacent to the heat exchanger, a position adjacent to the top panel, and a position adjacent to the bottom plate are sequentially arranged.
The housing is
A top panel that covers the heat exchanger and the upper part of the axial blower;
A bottom plate arranged below the heat exchanger and the axial blower,
Have
The long axis of the first flat tube is
The first end portion is inclined so as to be located below the second end portion in the vertical direction,
The axial blower is
The outdoor unit according to claim 1 or 2, wherein the rotary blade rotates in a rotation direction in which a position adjacent to the top panel, a position adjacent to the heat exchanger, and a position adjacent to the bottom plate are in this order.
When a virtual horizontal plane passing through the second end portions of each of the plurality of flat tubes is defined as a first virtual horizontal plane,
The long axis of the flat tube arranged above or below the first flat tube and at a position facing the first flat tube has the first flat surface with respect to the first virtual horizontal plane. The outdoor unit according to any one of claims 1 to 4, wherein the long axis of the pipe is inclined in the same direction as the direction inclining with respect to the first virtual horizontal plane.
The long axis of the flat tube arranged above or below the first flat tube and at a position facing the first flat tube has the first flat surface with respect to the first virtual horizontal plane. The outdoor unit according to claim 5, wherein the long axis of the pipe is inclined at the same angle as the inclination angle with respect to the first virtual horizontal plane.
When a virtual horizontal plane passing through the second end portions of each of the plurality of flat tubes is defined as a first virtual horizontal plane,
The long axis of each of the plurality of flat tubes is inclined with respect to the first virtual horizontal plane in the same direction as the direction in which the long axis of the first flat tube is inclined with respect to the first virtual horizontal plane. The outdoor unit according to any one of claims 1 to 4.
The long axis of each of the plurality of flat tubes is inclined with respect to the first virtual horizontal plane at the same angle as the inclination angle of the long axis of the first flat tube with respect to the first virtual horizontal plane. The outdoor unit according to 7.
The heat exchanger is
The outdoor unit according to any one of claims 1 to 8, further comprising at least one circular pipe through which a refrigerant flows.
When a virtual horizontal plane passing through the rotation axis is defined as a second virtual horizontal plane,
The outdoor unit according to any one of claims 1 to 9, wherein the facing portion is a point where the second virtual horizontal plane and the rotating circle are in contact with each other.
A refrigeration cycle apparatus including the outdoor unit according to any one of claims 1 to 10.