JP7229255B2 - Outdoor unit and refrigeration cycle device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit used in a refrigeration cycle apparatus such as an air conditioner having flat tubes as heat transfer tubes, and a refrigeration cycle apparatus including the outdoor unit.

2. Description of the Related Art Conventionally, as an outdoor unit for use in a refrigeration cycle apparatus such as an air conditioner equipped with flat tubes, an outdoor unit in which flat tubes are inclined in multiple directions has been proposed (see Patent Document 1). In the outdoor unit of Patent Document 1, regarding the inclination of the tube arrangement of the flat tubes, the tubes are inclined downward toward the blower above the installation height of the blower (upper part of the heat exchanger), and below the installation height of the blower. At (heat exchanger bottom), the tubes are slanted upwards towards the blower. In the outdoor unit of Patent Document 1, by arranging the flat tubes with such an inclination, the ventilation resistance is reduced and the output required by the outdoor unit is reduced.

JP 2017-053518 A

The outdoor unit of the air conditioner of Patent Document 1 has the effect of reducing ventilation resistance and reducing the output required by the outdoor unit. There is a problem of becoming

The present invention is intended to solve the above problems, and is provided with an outdoor unit that can obtain the effect of reducing ventilation resistance with a simple structure and reducing the output required by the outdoor unit, and the outdoor unit. To provide a refrigeration cycle apparatus with

The outdoor unit of the present invention comprises a housing, an axial-flow fan arranged inside the housing and forming an air flow passing through the housing, and a plurality of flat tubes spaced apart in the vertical direction. facing the axial-flow fan inside the housing, arranged on the windward side of the axial-flow fan in the air flow formed by the axial-flow fan, and extending in a direction perpendicular to the bottom plate of the housing. and an exchanger, wherein each of the plurality of flat tubes has a first end positioned on the side where the axial flow fan is arranged, and a windward side of the air flow passing through the heat exchanger with respect to the first end. and a second end located in the flat shape, and the long axis passing through the first end and the second end is inclined in the same direction with respect to the horizontal plane, and heat exchange in the vertical direction When the virtual horizontal plane passing through the center position of the length of the vessel is defined as the first virtual horizontal plane, and the virtual horizontal plane passing through the second end is defined as the second virtual horizontal plane, the axial flow fan has a rotation axis that is the first virtual horizontal plane. It is arranged at a position shifted in the vertical direction with respect to the horizontal plane, and in the vertical direction, the side where the first end is arranged with respect to the second virtual horizontal plane and the rotation axis are arranged in the first virtual horizontal plane and the side arranged opposite to each other are the same sides.

In the outdoor unit of the present invention, each of the plurality of flat tubes formed in a flat shape has a long axis passing through the first end and the second end inclined in the same direction with respect to the horizontal plane. structure can be manufactured. In addition, the axial flow fan is arranged such that the rotation axis is vertically displaced with respect to the first virtual horizontal plane, and in the vertical direction of the housing, the first end is located at the second virtual horizontal plane. The side on which it is arranged and the side on which the rotation axis is arranged with respect to the first imaginary horizontal plane are the same side. Therefore, in the outdoor unit, there is little difference between the position of the axial fan, which is the air flow direction in the housing, and the direction of the air flowing between the flat tubes, and the ventilation resistance of the heat exchanger can be reduced. As a result, the outdoor unit and the refrigeration cycle apparatus including the outdoor unit can reduce the ventilation resistance with a simple structure, and can obtain the effect of reducing the output required by the outdoor unit.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front perspective view of the outdoor unit which concerns on Embodiment 1 of this invention. 1 is a rear perspective view of the outdoor unit according to Embodiment 1 of the present invention; FIG. 1 is a schematic front view of an outdoor unit according to Embodiment 1 of the present invention; FIG. FIG. 4 is a cross-sectional view of the outdoor unit shown in FIG. 3 taken along the line AA; FIG. 4 is a cross-sectional view of the outdoor unit shown in FIG. 3 taken along the line BB. 6 is an enlarged view of a flat tube in the C section of the outdoor unit shown in FIG. 5. FIG. FIG. 4 is a sectional view taken along the line BB of a modification of the outdoor unit shown in FIG. 3; FIG. 8 is an enlarged view of a flat tube in the D section of the outdoor unit shown in FIG. 7; 6 is a schematic cross-sectional view showing the position of the rotating shaft shown in FIG. 5; FIG. FIG. 4 is a schematic cross-sectional view of an outdoor unit according to Embodiment 2 of the present invention; FIG. 4 is a schematic cross-sectional view of an outdoor unit according to Embodiment 3 of the present invention; It is a figure which shows the structure of the refrigerating-cycle apparatus which concerns on Embodiment 4 of this invention.

Hereinafter, the outdoor unit 100, the outdoor unit 110, the outdoor unit 120 and the refrigerating cycle device 50 of the present invention will be described in detail with reference to the drawings. In the drawings below, the size relationship of each component may differ from the actual size. Moreover, in the following drawings, the same reference numerals denote the same or corresponding parts, and this applies throughout the specification. Furthermore, the forms of the components shown in the entire specification are merely examples, and are not limited to these descriptions. Also, terms representing directions or positions (for example, "up", "down", "right", "left", "front", "back", etc.) are used as appropriate to facilitate understanding. However, these notations are only described as such for convenience of explanation, 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 outline of the outdoor unit 100 will be described with reference to FIGS. 1 and 2. FIG. In the following drawings including FIG. 1, the X-axis indicates the horizontal direction of the outdoor unit 100, the Y-axis indicates the front-rear 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, and 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. Further, in principle, the positional relationship (for example, vertical relationship, etc.) between constituent members in the specification is for when the outdoor unit 100 is installed in a usable state.

<Outdoor unit 100>
The outdoor unit 100 is used in refrigeration cycle devices used for refrigeration or air conditioning, such as refrigerators, freezers, vending machines, air conditioners, refrigerating devices, and water heaters. The outdoor unit 100 has a housing 1 . A 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. The housing 1 has a front panel 1a formed with a circular air outlet 1a1, and a rear panel 1b installed to face the front panel 1a and covering the rear of a machine room 4, which will be described later. In addition, the housing 1 includes a left side panel 1c provided on the side of the housing 1 on the side of the blower chamber 3, which will be described later, and a right side panel 1d provided on the side of the machine room 4. have. Further, the housing 1 includes a top panel 1e covering an upper opening formed by a front panel 1a, a rear panel 1b, a left side panel 1c, and a right side panel 1d, and a bottom plate 1f covering a lower opening. have A fan guard 1g for protecting the propeller fan 16 of the axial blower 12 by covering the outlet 1a1 is attached to the front panel 1a. A rectangular opening 1b1 is formed in the rear panel 1b, and a heat exchanger 11 is arranged inside the housing 1 through the opening 1b1.

FIG. 3 is a schematic front view of the outdoor unit 100 according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view of the outdoor unit 100 shown in FIG. 3 along line AA. FIG. 5 is a cross-sectional view of the outdoor unit 100 shown in FIG. 3 taken along line BB. Next, the internal configuration of the outdoor unit 100 will be described with reference to FIGS. 3 to 5. FIG. 5 indicate the flow of air formed by the axial fan 12. As shown in FIG. The outdoor unit 100 has a heat exchanger 11 and an axial fan 12 . The outdoor unit 100 also has a compressor 13 . The outdoor unit 100 has a partition plate 2 that divides the interior of the housing 1 into a fan chamber 3 and a machine chamber 4 . The partition plate 2 is provided inside the housing 1, is provided upward (Z-axis direction) from the bottom plate 1f, and is provided in the front-rear 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. A heat exchanger 11 and an axial flow fan 12 arranged to face the heat exchanger 11 are accommodated on the blower chamber 3 side, and a compressor 13 is accommodated on the machine chamber 4 side. there is 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 performs heat exchange 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 as a condenser during cooling operation. The heat exchanger 11 faces the axial fan 12 inside the housing 1 and is arranged on the windward side of the axial fan 12 in the air flow formed by the axial fan 12 . The heat exchanger 11 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 flat tube 22 is a heat transfer tube, and refrigerant passes through the inside of the tube. Each of the plurality of flat tubes 22 extends horizontally (eg, in the X-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 air passes between adjacent fins 21 . The heat exchanger 11 is formed in a straight line facing the axial flow fan 12 when viewed in a direction perpendicular to the bottom plate 1f. In other words, the heat exchanger 11 may at least face the axial fan 12 in the Y-axis direction and be arranged on the windward side of the axial fan 12 . 5 illustrates a case where the plurality of flat tubes 22 are orthogonal to the fins 21 in the heat exchanger 11, the fins 21 may be of other forms, and the fins 21 are not provided. may Although FIG. 4 illustrates the case where the heat exchanger 11 is formed in a straight line when viewed in a direction perpendicular to the bottom plate 1f, the heat exchanger 11 is formed in a straight line. It may have a curved area and a curved area, and may be formed in an L shape when viewed in a direction perpendicular to the bottom plate 1f. Also, the heat exchanger 11 may be formed in a U shape with curved surface regions at both ends when viewed in a direction perpendicular to the bottom plate 1f.

FIG. 6 is an enlarged view of the flat tube 22 in the C section of the outdoor unit 100 shown in FIG. Each of the plurality of flat tubes 22 has a first end 23 positioned on the side where the axial flow fan 12 is arranged, and a position on the windward side of the air flow passing through the heat exchanger 11 with respect to the first end 23 . It has a flat shape with a second end 24 that Each of the plurality of flat tubes 22 has a long axis LS passing through the first end 23 and the second end 24 inclined in the same direction with respect to the horizontal plane F. As shown in FIG. The direction here is defined as the direction in which the long axis LS of the flat tube 22 is inclined with respect to the horizontal plane F at an angle greater than 0 degrees and less than 90 degrees. In other words, the long axis LS is continuous in the direction in which the flat tube 22 extends, and the direction here is the direction in which the surface formed by the long axis LS in the direction in which the flat tube 22 extends is inclined with respect to the horizontal plane F. Define. This direction is indicated as direction DR in FIG. Inclining in the same direction is defined as that the long 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. In other words, the long axis LS is continuous in the direction in which the flat tube 22 extends, and being inclined in the same direction here means that the surfaces formed by the long axis LS in the direction in which the flat tube 22 extends are vertically aligned. In terms of direction, it is defined as being inclined to the same side with respect to the horizontal plane F.

Here, as shown in FIG. 6, a virtual horizontal plane F passing through the second end 24 of the flat tube 22 is defined as a second virtual horizontal plane F2. It is desirable that each of the plurality of flat tubes 22 has the same inclination angle θ of the long axis LS with respect to the second virtual horizontal plane F2. In other words, when the angle formed by the long axis LS of the flat tube 22 in the extending direction of the flat tube 22 with respect to the second imaginary horizontal plane F2 is the inclination angle θ, each of the plurality of flat tubes 22 is , and the inclination angle θ are the same. However, each of the plurality of flat tubes 22 is not limited to having the same inclination angle θ of the long axis LS. If the long axis LS passing through the first end portion 23 and the second end portion 24 of each of the plurality of flat tubes 22 is inclined in the same direction with respect to the second virtual horizontal plane F2, the inclination angle of the long axis LS is θ may be different angles. When the inclination angles θ of the long axes LS are the same for the plurality of flat tubes 22, the outdoor unit 100 can be manufactured with a simpler structure and method because there is no need to adjust the inclination angles θ of the long axes LS. be able to.

(Axial blower 12)
Returning to FIGS. 3 to 5, the axial flow fan 12 will be described. The axial blower 12 is arranged inside the housing 1 and forms an air flow passing through the housing 1 . The axial blower 12 is a blowing means having a motor 15 and a propeller fan 16, and generates circulation of air for efficiently performing heat exchange between refrigerant and air in the heat exchanger 11. FIG. A propeller fan 16 of the axial blower 12 has a hub portion 17 that rotates about its axis, and a plurality of rotor blades 18 radially provided on the outer peripheral portion of the hub portion 17 . In the front edge portion 19 of the rotor blade 18 located on the arrangement side of the heat exchanger 11, the rotor blade 18 has a tip portion 19a positioned at the tip in the radial direction, a base portion 19b which is a boundary portion with the hub portion 17, have As shown in FIG. 5, the axial blower 12 is arranged inside the housing 1 in front of the heat exchanger 11 (on the Y1 side). In other words, the axial blower 12 faces the heat exchanger 11 and is arranged on the leeward side of the air flow passing through the heat exchanger 11 . The axial flow fan 12 creates a negative pressure between the heat exchanger 11 and the propeller fan 16, introduces outside air into the housing 1 from the rear side (Y2 side) of the housing 1, The outside air introduced into is discharged toward the front side (Y1 side) of the outdoor unit 100 . At this time, the axial blower 12 forms an air flow passing through the heat exchanger 11 .

The positional relationship between the axial fan 12 and the heat exchanger 11 in the outdoor unit 100 will be described with reference to FIGS. 5 and 6. FIG. As shown in FIG. 5, a virtual horizontal plane passing through the center position 11c of the length of the heat exchanger 11 in the vertical direction (Z-axis direction) is defined as a first virtual horizontal plane F1. The first virtual horizontal plane F1 passes through the center position 11c of the length between the lower end portion 11a and the upper end portion 11b of the heat exchanger 11, as shown in FIG. As shown in FIG. 5, the axial flow fan 12 is arranged such that the rotation axis S1 is vertically displaced from the first imaginary horizontal plane F1. 5 and 6, in the vertical direction of the housing 1, the outdoor unit 100 is arranged such that the first end portion 23 of the flat tube 22 is arranged with respect to the second virtual horizontal plane F2. , the side on which the rotation axis S1 of the axial flow fan 12 is arranged with respect to the first imaginary horizontal plane F1. Therefore, the long axis LS of the flat tube 22 is inclined such that the first end 23 is located above the second end 24 in the vertical direction. In the vertical direction of the heat exchanger 11, the rotation axis S1 of the axial flow fan 12 is located between the first imaginary horizontal plane F1 and the upper end portion 11b of the heat exchanger 11. As shown in FIG.

FIG. 7 is a cross-sectional view taken along line BB of a modification of the outdoor unit 100 shown in FIG. FIG. 8 is an enlarged view of the flat tube 22 in the D section of the outdoor unit 100 shown in FIG. Each of the plurality of flat tubes 22 has a first end 23 positioned on the side where the axial flow fan 12 is arranged, and a position on the windward side of the air flow passing through the heat exchanger 11 with respect to the first end 23 . It has a flat shape with a second end 24 that Each of the plurality of flat tubes 22 has a long axis LS passing through the first end 23 and the second end 24 inclined in the same direction with respect to the horizontal plane F. As shown in FIG. The long axis LS of the flat tube 22 is inclined such that the first end 23 is located below the second end 24 in the vertical direction. In the vertical direction of the heat exchanger 11, the rotation axis S1 of the axial flow fan 12 is positioned between the first imaginary horizontal plane F1 and the lower end portion 11a of the heat exchanger 11. As shown in FIG.

FIG. 9 is a schematic cross-sectional view showing the position of the rotating shaft S1 shown in FIG. A desirable position of the axial blower 12 will be further described with reference to FIG. A contact portion 20 is defined as a point at which a virtual vertical plane VS located midway between the tip portion 19a and the base portion 19b of the front edge portion 19 in the direction of the rotation axis S1 of the axial flow fan 12 intersects with the rotation axis S1. . The contact portion 20 includes a first imaginary horizontal plane F1 passing through the center position 11c of the vertical length of the heat exchanger 11, and a flat tube 22 among the plurality of flat tubes 22 positioned directly above the first imaginary horizontal plane F1. and an imaginary plane F4 passing through the long axis LS of .

(Compressor 13)
Returning to FIG. 4, the compressor 13 compresses the sucked refrigerant into a state of high-temperature and high-pressure gas refrigerant and discharges it. The compressor 13 is, for example, a rotary compressor, a scroll compressor, or a vane compressor. The compressor 13 may include an inverter device, and may be configured to change the capacity of the compressor 13 by changing the operating frequency with the inverter device. Note that the capacity of the compressor 13 is the amount of refrigerant sent out per unit time.

(Operation of outdoor unit 100)
Next, air flow in the outdoor unit 100 will be described. First, in the outdoor unit 100, when the axial fan 12 operates, the space between the axial fan 12 and the heat exchanger 11 in the fan chamber 3 is in a negative pressure state. When the space between the axial fan 12 and the heat exchanger 11 is in a negative pressure state, the outdoor unit 100 is pushed out from the outside of the housing 1 through the opening 1b1 formed in the housing 1. Air flows into the body 1 . This inflowing air passes through the heat exchanger 11 by passing between the adjacent fins 21 of the heat exchanger 11 and between the adjacent flat tubes 22 . do. At this time, in the heat exchanger 11 , heat is exchanged between the air flowed into the housing 1 by the axial blower 12 and the refrigerant flowing inside the flat tubes 22 . Air that has undergone heat exchange with the refrigerant flowing inside the flat tubes 22 in the heat exchanger 11 is discharged outside the housing 1 by the axial flow fan 12 .

As described above, each of the plurality of flat tubes 22 formed in a flat shape has the long axis LS passing through the first end 23 and the second end 24 inclined in the same direction with respect to the horizontal plane F. Therefore, the outdoor unit 100 can be manufactured with a simple structure. Further, the axial flow fan 12 is arranged such that the rotation axis S1 is vertically displaced from the first imaginary horizontal plane F1. Then, in the vertical direction of the housing 1, the side where the first end portion 23 is arranged with respect to the second virtual horizontal plane F2 and the side where the rotation axis S1 is arranged with respect to the first virtual horizontal plane F1. and are on the same side. Therefore, in the outdoor unit 100, the difference between the position of the axial blower 12, which is the air flow direction in the housing 1, and the direction of the air flowing between the flat tubes 22 is small, and the ventilation resistance of the heat exchanger 11 is reduced. can be made smaller. As a result, the outdoor unit 100 can reduce the ventilation resistance with a simple structure, and can obtain the effect of reducing the output required by the outdoor unit 100 .

Further, each of the plurality of flat tubes 22 formed in a flat shape has a long axis LS passing through the first end 23 and the second end 24 inclined in the same direction with respect to the horizontal plane F. Therefore, the outdoor unit 100 can quickly drain the defrosted water in the direction in which the long axis LS faces downward when defrosting operation is performed for frost formation on the heat exchanger 11. can save time.

In addition, when the inclination angle θ of the major axis LS is the same for each of the plurality of flat tubes 22, the outdoor unit 100 does not need to adjust the inclination angle θ of the major axis LS for each flat tube 22. Therefore, the outdoor unit 100 can be manufactured with a simpler structure.

Further, the long axis LS of the flat tube 22 is inclined such that the first end portion 23 is positioned above the second end portion 24 in the vertical direction. In the vertical direction of the heat exchanger 11, the rotation axis S1 of the axial flow fan 12 is located between the first imaginary horizontal plane F1 and the upper end portion 11b of the heat exchanger 11. As shown in FIG. Therefore, in the outdoor unit 100, the difference between the position of the axial blower 12, which is the air flow direction in the housing 1, and the direction of the air flowing between the flat tubes 22 is small, and the ventilation resistance of the heat exchanger 11 is reduced. can be made smaller. As a result, the outdoor unit 100 can obtain the effect of reducing the ventilation resistance and reducing the output required by the outdoor unit 100 .

A contact portion 20 is defined as a point at which a virtual vertical plane VS located midway between the tip portion 19a and the base portion 19b in the direction of the rotation axis S1 of the axial fan 12 intersects with the rotation axis S1. In the outdoor unit 100, the contact portion 20 has a virtual first virtual horizontal plane F1 passing through the center position 11c of the length in the vertical direction of the heat exchanger 11, and a flat tube 22 positioned directly above the first virtual horizontal plane F1. and an imaginary plane F4 passing through the long axis LS of . By arranging the axial flow fan 12 in the housing 1 so that the contact portion 20 is arranged at the position, the position of the axial flow fan 12 in the direction of air flow in the housing 1 and the position of the flat tube 22 are adjusted. The difference from the direction of the air flowing therebetween is small, and the ventilation resistance of the heat exchanger 11 can be reduced. As a result, the outdoor unit 100 can reduce the ventilation resistance with a simple structure, and can obtain the effect of reducing the output required by the outdoor unit 100 .

Further, the long axis LS of the flat tube 22 is inclined such that the first end portion 23 is located below the second end portion 24 in the vertical direction. In the vertical direction of the heat exchanger 11, the rotation axis S1 of the axial flow fan 12 is positioned between the first imaginary horizontal plane F1 and the lower end portion 11a of the heat exchanger 11. As shown in FIG. Therefore, in the outdoor unit 100, the difference between the position of the axial blower 12, which is the air flow direction in the housing 1, and the direction of the air flowing between the flat tubes 22 is small, and the ventilation resistance of the heat exchanger 11 is reduced. can be made smaller. As a result, the outdoor unit 100 can obtain the effect of reducing the ventilation resistance and reducing the output required by the outdoor unit 100 .

Embodiment 2.
<Outdoor unit 110>
FIG. 10 is a schematic cross-sectional view of outdoor unit 110 according to Embodiment 2 of the present invention. The outdoor unit 110 is used in refrigeration cycle devices used for refrigeration or air conditioning, such as refrigerators, freezers, vending machines, air conditioners, refrigeration systems, and water heaters. In the outdoor unit 100 according to Embodiment 1, the heat transfer tubes are all made up of flat tubes 22, whereas in the outdoor unit 110 according to Embodiment 2, circular tubes 22a are included as part of the heat transfer tubes. different in that The configuration of the outdoor unit 110 according to Embodiment 2 differs from that of the outdoor unit 100 according to Embodiment 1 only in the configuration of the heat transfer tubes, and the other configurations are the same as those of the outdoor unit 100 according to Embodiment 1. . Parts having the same configurations as those of the outdoor unit 100 of FIGS. 1 to 9 are denoted by the same reference numerals, and description thereof will be omitted. Items not particularly described in the outdoor unit 100 according to Embodiment 2 are the same as those in the outdoor unit 100 according to Embodiment 1, and the same functions and configurations are described using the same reference numerals.

The heat exchanger 111 is arranged inside the housing 1 and exchanges heat between the refrigerant flowing inside and the outside air. When the outdoor unit 110 is used in a refrigeration cycle device for air conditioning, the heat exchanger 111 functions as an evaporator during heating operation and as a condenser during cooling operation. The heat exchanger 111 faces the axial fan 12 inside the housing 1 and is arranged on the windward side of the axial fan 12 in the air flow formed by the axial fan 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 has at least one circular tube 22a perpendicular 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 composed of the flat tubes 22 only in that the heat transfer tubes have circular tubes 22a as part of the heat transfer tubes. Identical to vessel 11 . Note that the number of circular tubes 22a may be one or more. Further, the circular pipe 22a is generally arranged on the side of the lower end portion 11a of the heat exchanger 111, but the circular pipe 22a may be arranged at any position in the vertical direction of the heat exchanger 111.

As described above, the heat exchanger 111 further has at least one circular tube 22a through which the refrigerant flows. In general, the flat tube 22 may have difficulty in flowing the refrigerant because the inner tube has a small diameter. However, there are cases where the heat exchanger 111 needs to have a part of the heat exchanger 111 as a whole where the refrigerant can easily pass. By having at least one circular tube 22a, the heat exchanger 111 can form a portion through which the refrigerant can easily pass. Further, since the outdoor unit 100 according to Embodiment 1 has the configuration of the flat tubes 22 and the axial flow fan 12, the outdoor unit 110 has a simple structure and reduces the ventilation resistance. It is possible to obtain the effect of reducing the output to be applied.

Embodiment 3.
<Outdoor unit 120>
FIG. 11 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 in refrigeration cycle devices used for refrigeration or air conditioning, such as refrigerators, freezers, vending machines, air conditioners, refrigeration systems, and water heaters. The outdoor unit 100 according to Embodiment 1 includes one heat exchanger 11 and one axial flow fan 12, whereas the outdoor unit 120 according to Embodiment 3 includes the heat exchanger 11 and the axial flow fan 12. It is different from the axial flow fan 12 in that it is composed of a plurality of units. The outdoor unit 120 according to Embodiment 3 differs from the outdoor unit 100 according to Embodiment 1 only in the number of heat exchangers 11 and axial fans 12 used, and the rest of the configuration is that of Embodiment 1. It is the same as the outdoor unit 100 . Similarly, the outdoor unit 120 according to Embodiment 3 differs from the outdoor unit 110 according to Embodiment 2 only in the number of heat exchangers 11 and axial fans 12 used, and other configurations are the same as in the embodiment. 2 is the same as the outdoor unit 110 according to No. 2. Parts having the same configurations as those of the outdoor unit 100 or the outdoor unit 110 of FIGS. Items not particularly described in the outdoor unit 120 according to Embodiment 3 are the same as those of the outdoor unit 100 according to Embodiment 1 or the outdoor unit 110 according to Embodiment 2, and the same functions and configurations are the same. will be described using the symbols of

The outdoor unit 120 has a plurality of heat exchangers 11 arranged in the vertical direction of gravity, and a plurality of axial fans 12 facing the heat exchangers 11 . As shown in FIG. 11, the outdoor unit 120 has a first heat exchanger 112 arranged on the upper side in the direction of gravity and a second heat exchanger 113 arranged on the lower side in the direction of gravity. . Further, as shown in FIG. 11, the outdoor unit 120 includes a first axial flow fan 121 arranged on the upper side in the direction of gravity, a second axial flow fan 122 arranged on the lower side in the direction of gravity, have The outdoor unit 120 may have two or more heat exchangers 11 and axial fans 12 installed. In FIG. 11, two heat exchangers 11 are spaced apart, and the lower end portion 11a of the first heat exchanger 112 arranged on the upper side and the second heat exchanger arranged on the lower side The upper end portion 11b of 113 may be in contact. The inclination direction of the flat tubes 22 in the first heat exchanger 112 arranged on the upper side and the shifting direction of the axial flow fan 12, and the inclination direction of the flat tubes 22 in the second heat exchanger 113 arranged on the lower side and The shifting direction of the axial blower 12 may be the same or may be different. For example, the second heat exchanger 113 arranged on the lower side has the configuration of the outdoor unit 100 shown in FIG. The upper and lower heat exchangers 11 may have different configurations, as in the configuration of the example. In this case, in the second heat exchanger 113 arranged on the lower side of the outdoor unit 120, the major axis LS of the flat tube 22 is arranged such that the first end 23 is the second end 24 as shown in FIG. It is slanted to be positioned higher than In the vertical direction of the heat exchanger 11, the rotation axis S1 of the axial flow fan 12 is located between the first imaginary horizontal plane F1 and the upper end portion 11b of the heat exchanger 11. As shown in FIG. Further, in the first heat exchanger 112 arranged on the upper side, the long axis LS of the flat tube 22 is inclined so that the first end 23 is positioned below the second end 24 . In the vertical direction of the heat exchanger 11, the rotation axis S1 of the axial flow fan 12 is positioned between the first imaginary horizontal plane F1 and the lower end portion 11a of the heat exchanger 11. As shown in FIG.

As described above, the outdoor unit 120 has multiple heat exchangers 11 arranged in the direction of gravity and multiple axial fans 12 facing the multiple heat exchangers 11 . Therefore, the outdoor unit 120 can be adapted to the scale of the air-conditioned space by increasing the number of the heat exchangers 11 and the axial flow fans 12, and the parts can be shared. Further, since the outdoor unit 100 according to Embodiment 1 has the configuration of the flat tubes 22 and the axial flow fan 12, the outdoor unit 120 can reduce the ventilation resistance with a simple structure, and the outdoor unit 100 is not required. It is possible to obtain the effect of reducing the output to be applied.

Embodiment 4.
[Refrigeration cycle device 50]
FIG. 12 is a diagram showing the configuration of a refrigeration cycle apparatus 50 according to Embodiment 4 of the present invention. The outdoor unit 100, the outdoor unit 110, or the outdoor unit 120 according to the first to third embodiments is used for the outdoor unit 150 of the refrigeration cycle apparatus 50 according to the fourth embodiment. Also, in the following description, the refrigeration cycle device 50 will be described as being used for air conditioning, but the refrigeration cycle device 50 is not limited to being used for air conditioning. The refrigerating cycle device 50 is used, for example, for refrigeration or air conditioning applications such as refrigerators, freezers, vending machines, air conditioners, refrigeration systems, and water heaters.

The refrigeration cycle device 50 according to Embodiment 4 heats or cools the room by transferring heat between the outside air and the indoor air via the refrigerant, thereby performing air conditioning. The refrigeration cycle device 50 has an outdoor unit 150 and an indoor unit 200 . In the refrigerating cycle device 50, an outdoor unit 150 and an indoor unit 200 are pipe-connected by refrigerant pipes 300 and 400 to form a refrigerant circuit in which 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. 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 switching device 102, the outdoor heat exchanger 103, the expansion valve 105, and the indoor heat exchanger 201 are sequentially connected via refrigerant pipes.

(Outdoor unit 150)
The outdoor unit 150 has a compressor 101 , a channel switching device 102 , an outdoor heat exchanger 103 and an expansion valve 105 . Compressor 101 compresses and discharges the sucked refrigerant. As the compressor 101, the compressor 13 or the like used in the outdoor unit 100, the outdoor unit 110 or the outdoor unit 120 of the first to third embodiments described above is used. Here, the compressor 101 may include an inverter device, and may be configured to change the capacity of the compressor 101 by changing the operating frequency with the inverter device. Note that the capacity of the compressor 101 is the amount of refrigerant sent out per unit time. The channel switching device 102 is, for example, a four-way valve, and is a device that switches the direction of the coolant channel. The refrigeration cycle device 50 can realize heating operation or cooling operation by switching the refrigerant flow 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 refrigerant and outdoor air. As the outdoor heat exchanger 103 of the refrigeration cycle device 50, the heat exchanger 11, the heat exchanger 111, or the like used in the outdoor unit 100, the outdoor unit 110, or the outdoor unit 120 of Embodiments 1 to 3 described above is used. be done. 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 the refrigerant. The outdoor heat exchanger 103 functions as a condenser during cooling operation, and performs heat exchange between the refrigerant that has been compressed by the compressor 101 and has flowed in from the flow path switching device 102 and the outdoor air. Condense and liquefy. The outdoor heat exchanger 103 is provided with an outdoor fan 104 in order to increase the efficiency of heat exchange between the refrigerant and the outdoor air. As the outdoor fan 104, the axial-flow fan 12 or the like used in the outdoor unit 100, the outdoor unit 110, or the outdoor unit 120 of the first to third embodiments described above is used. The outdoor fan 104 may be equipped with an inverter device to change the operating frequency of the fan motor to change the rotational speed of the fan. The expansion valve 105 is a throttle device (flow rate control means), 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 degree of opening. For example, if the expansion valve 105 is an electronic expansion valve or the like, the degree of opening is adjusted based on instructions from a control device (not shown) or the like.

(Indoor unit 200)
The indoor unit 200 has an indoor heat exchanger 201 that exchanges heat between a refrigerant and indoor air, and an indoor fan 202 that adjusts the flow of air with which the indoor heat exchanger 201 exchanges heat. During the heating operation, the indoor heat exchanger 201 functions as a condenser, performs heat exchange between the refrigerant flowing from the refrigerant pipe 300 and the indoor air, condenses the refrigerant and liquefies it. let it flow. The indoor heat exchanger 201 functions as an evaporator during cooling operation, and performs heat exchange between the refrigerant brought to a low pressure state by the expansion valve 105 and indoor air, causing the refrigerant to take heat from the air and evaporate. to vaporize it and flow out to the refrigerant pipe 300 side. Indoor fan 202 is provided so as to face indoor heat exchanger 201 . The operating speed of the indoor fan 202 is determined by user settings. An inverter device may be attached to the indoor fan 202, and the rotational speed may be changed by changing the operating frequency of the fan motor.

[Example of operation of refrigeration cycle device 50]
Next, a cooling operation operation will be described as an operation example of the refrigeration cycle device 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 channel switching device 102 . The gas refrigerant that has flowed into the outdoor heat exchanger 103 is condensed by heat exchange with the outside air blown by the outdoor fan 104 , becomes a low-temperature refrigerant, and flows out of the outdoor heat exchanger 103 . The refrigerant that has flowed 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. This 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 fan 202, and becomes a low-temperature, low-pressure gas refrigerant in the indoor heat exchanger. 201. At this time, the indoor air that has been cooled by absorbing heat by the refrigerant becomes conditioned air (blown air), and is blown into the room (air-conditioned space) from the outlet of the indoor unit 200 . The gas refrigerant that has flowed out of the indoor heat exchanger 201 is sucked into the compressor 101 via the flow switching device 102 and compressed again. The above operations are repeated.

Next, a heating operation will be described as an example of the operation of the refrigeration cycle device 50. FIG. 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 switching device 102 . The gas refrigerant that has flowed into the indoor heat exchanger 201 is condensed by heat exchange with the indoor air blown by the indoor fan 202 , becomes a low-temperature refrigerant, and flows out of the indoor heat exchanger 201 . At this time, the indoor air heated by receiving heat from the gas refrigerant becomes conditioned air (blown air), and is blown into the room (air-conditioned space) from the outlet of the indoor unit 200 . The refrigerant flowing out of 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. This 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 fan 104, and becomes a low-temperature, low-pressure gas refrigerant in the outdoor heat exchanger 103. flow out from The gas refrigerant that has flowed out of the outdoor heat exchanger 103 is sucked into the compressor 101 via the flow switching device 102 and compressed again. The above operations are repeated.

Since the refrigeration cycle device 50 according to Embodiment 4 includes the outdoor unit 100, the outdoor unit 110, or the outdoor unit 120 according to Embodiments 1 to 3, the ventilation resistance is reduced with a simple structure, and the outdoor unit 150 is not required. It is possible to obtain the effect of reducing the output of

1 housing, 1a front panel, 1a1 outlet, 1b rear panel, 1b1 opening, 1c left side panel, 1d right side panel, 1e top panel, 1f bottom plate, 1g fan guard, 2 partition plate, 3 blower room, 4 machine room, 11 heat exchanger, 11a lower end, 11b upper end, 11c center position, 12 axial flow fan, 13 compressor, 15 motor, 16 propeller fan, 17 hub, 18 rotor, 19 front edge, 19a Tip Part 19b Base Part 20 Contact Part 21 Fin 22 Flat Tube 22a Circular Tube 23 First End Part 24 Second End Part 50 Refrigeration Cycle Device 100 Outdoor Unit 101 Compressor 102 Flow Path Switching device 103 outdoor heat exchanger 104 outdoor fan 105 expansion valve 110 outdoor unit 111 heat exchanger 112 first heat exchanger 113 second heat exchanger 120 outdoor unit 121 first axial flow fan , 122 second axial flow fan, 150 outdoor unit, 200 indoor unit, 201 indoor heat exchanger, 202 indoor fan, 300 refrigerant pipe, 400 refrigerant pipe.

Claims (8)

a housing;
an axial flow fan disposed inside the housing and forming an air flow passing through the housing;
It has a plurality of flat tubes arranged at intervals in the vertical direction, faces the axial flow fan inside the housing, and controls the air flow of the axial flow fan in the air flow formed by the axial flow fan. a heat exchanger arranged on the upper side and extending in a direction perpendicular to the bottom plate of the housing ;
with
Each of the plurality of flat tubes,
A flat plate having a first end located on the side where the axial flow fan is arranged and a second end located on the windward side of the air flow passing through the heat exchanger with respect to the first end a shape, and a long axis passing through the first end and the second end is inclined in the same direction with respect to the horizontal plane,
When a virtual horizontal plane passing through the center position of the length of the heat exchanger in the vertical direction is defined as a first virtual horizontal plane, and a virtual horizontal plane passing through the second end is defined as a second virtual horizontal plane,
The axial flow fan is
the rotating shaft is arranged at a position shifted in the vertical direction with respect to the first virtual horizontal plane;
In the vertical direction, the side on which the first end is arranged with respect to the second virtual horizontal plane and the side on which the rotating shaft is arranged with respect to the first virtual horizontal plane are the same side. outdoor unit. Each of the plurality of flat tubes,
The outdoor unit according to claim 1, wherein the inclination angles of the long axes with respect to the second virtual horizontal plane are the same. The long axis of the flattened tube is
the first end is inclined so as to be positioned above the second end in the vertical direction;
The axial flow fan is
3. The outdoor unit according to claim 1, wherein the rotating shaft is positioned between the first virtual horizontal plane and an upper end portion of the heat exchanger in the vertical direction. The long axis of the flattened tube is
the first end is inclined so as to be positioned below the second end in the vertical direction;
The axial flow fan is
The outdoor unit according to claim 1 or 2, wherein the rotating shaft is positioned between the first virtual horizontal plane and a lower end portion of the heat exchanger in the vertical direction. The heat exchanger is
The outdoor unit according to any one of claims 1 to 4, further comprising at least one circular pipe through which a refrigerant flows. a plurality of the heat exchangers arranged in the vertical direction;
a plurality of axial fans facing the plurality of heat exchangers;
The outdoor unit according to any one of claims 1 to 5. The axial flow fan is
a hub portion rotated about an axis;
a plurality of rotor blades radially provided on the outer periphery of the hub;
has
The rotor blade is
At the front edge of the rotor blade located on the side where the heat exchanger is arranged, the blade has a tip portion located at a tip in a radial direction and a base portion which is a boundary portion with the hub portion,
In the direction of the rotational axis of the axial flow fan, a virtual vertical plane located midway between the tip portion and the base portion intersects with the rotational shaft, and the first virtual horizontal plane and the plurality of flat surfaces are in contact with each other. 4. The outdoor unit according to claim 3 , wherein the pipe is positioned between the virtual plane passing through the long axis of the flat pipe positioned directly above the first virtual horizontal plane. A refrigeration cycle apparatus comprising the outdoor unit according to any one of claims 1 to 7.

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