Air conditioner outdoor unit

Abstract

To provide an outdoor unit for an air conditioner which can prevent a flange provided on the periphery of a leg from hitting a compressor fixing part provided on a bottom plate and suppress deformation of the compressor fixing part even when the outdoor unit is dropped and a vibration-proof member is significantly compressed. [Solution] The compressor fixing portions 23a, 23b, 23c are formed by protruding a portion of the bottom plate 11 upward, and downwardly bent flange portions 24 are formed on the periphery of the leg fixing portions 30a, 30b, 30c, and the flange portions have a pair of first flange portions 35, 35 formed on the periphery of the multiple leg fixing portions, and each first flange portion extends toward the adjacent leg fixing portion, and the second flange portion 36 is formed continuously between the first flange portions that extend toward each other from the adjacent leg fixing portions, and a first vertical distance between the upper surface of the bottom plate and the lower end of the second flange portion is set to be smaller than a second vertical distance between the upper surface of the compressor fixing portion and the lower ends of the pair of first flange portions.

Description

[Technical Field]

[0001] The present invention relates to an outdoor unit of an air conditioner. [Background technology]

[0002] An outdoor unit of an air conditioner houses a compressor inside a housing. Plate-shaped legs are fixed to the bottom of the compressor. A number of leg fixing portions are provided on the outer periphery of the legs. The same number of compressor fixing portions as the leg fixing portions are provided on the bottom plate of the housing. The compressor fixing portions are provided in locations corresponding to the arrangement of the leg fixing portions. Vibration-damping members are then placed between the leg fixing portions and the compressor fixing portions, and the leg fixing portions and the compressor fixing portions are fastened together with fastening members. As a result, the legs of the compressor are supported on the bottom plate of the housing via the vibration-damping members.

[0003] The compressor fixing portion is formed by drawing a part of the bottom plate so that it protrudes upward in, for example, a truncated cone shape, thereby increasing the strength of the compressor fixing portion. In addition, as in the technology disclosed in Patent Document 1, for example, flanges are formed on the periphery of the legs that are bent downwards towards the bottom plate of the housing, and even if the packaged outdoor unit is dropped during transportation and a strong external force acts on the legs, the reinforcement of the flanges prevents damage and deformation of the legs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-652392 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if an outdoor unit equipped with a heavy compressor is dropped during transportation, the vibration-damping member will be significantly compressed. If the vibration-damping member is significantly compressed, the flanges on the periphery of the legs may collide with the compressor fixing portion, potentially deforming the compressor fixing portion. Deforming the compressor fixing portion may tilt the fastening member, causing the compressor to tilt as well. If the compressor is driven in a tilted state, excessive stress is applied to the connection between the compressor and the piping components. If vibrations caused by driving the compressor while stress is applied to the stressed area, the piping components may be damaged.

[0006] The present invention has been made to solve such problems, and aims to provide an outdoor unit for an air conditioner that can prevent the flanges on the periphery of the legs from hitting the compressor fixing portion on the bottom plate, even if the outdoor unit is dropped and the vibration-damping member is significantly compressed, thereby suppressing deformation of the compressor fixing portion. [Means for solving the problem]

[0007] An outdoor unit of an air conditioner according to one aspect of the present invention comprises a compressor, a housing for accommodating the compressor, a plurality of leg fixing portions provided on legs fixed to the bottom of the compressor, a compressor fixing portion provided on the bottom plate of the housing at a position opposite the plurality of leg fixing portions, and a fastening portion for supporting the legs on the bottom plate by arranging a vibration-damping member between the leg fixing portion and the compressor fixing portion, wherein the compressor fixing portion is formed by protruding a portion of the bottom plate upward, and a flange portion bent downward is formed on the periphery of the leg, and a pair of first flange portions are formed on the periphery of the plurality of leg fixing portions, each of the first flange portions extending toward adjacent leg fixing portions, and the second flange portion is formed continuously between the first flange portions that face each other from adjacent leg fixing portions, and a first vertical distance between the upper surface of the bottom plate and the lower end of the second flange portion is set to be smaller than a second vertical distance between the upper surface of the compressor fixing portion and the lower ends of the pair of first flange portions. [Effects of the Invention]

[0008] According to the outdoor unit of the air conditioner of the present invention, even if the outdoor unit falls and the vibration-damping member is significantly compressed, the flanges provided on the periphery of the legs do not come into contact with the compressor fixing portion provided on the bottom plate, and the compressor can be maintained in a fixed state. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a circuit diagram showing an air conditioner according to the present invention. [Figure 2] FIG. 2 is a perspective view showing the outdoor unit of the air conditioner. [Figure 3] 10 is a diagram showing a state in which the legs fixed to the lower part of the compressor are fixed to the bottom plate inside the housing via fastening members. FIG. [Figure 4] FIG. 2 is a plan view showing the shape of the leg portion. [Figure 5] FIG. 2 is a diagram showing the shape of the leg portion as viewed from the arrow AA. [Figure 6] 10A and 10B are diagrams showing leg fixing portions and flange portions provided on the leg portions. [Figure 7] 10 is a parts exploded view showing a procedure for fixing the legs to the bottom plate via fastening members. FIG. [Figure 8] FIG. 10 is a side view showing a state in which the legs are supported on the bottom plate via fastening members. [Figure 9] FIG. 10 is a plan view showing a state in which the legs are supported on the bottom plate via fastening members. [Figure 10] FIG. 10 is a side view showing a state in which the leg portion of the comparative example is supported on the bottom plate via a fastening member. DETAILED DESCRIPTION OF THE INVENTION

[0010] Next, embodiments of the present invention will be described with reference to the drawings. The embodiments shown below are examples of devices and methods for embodying the technical concept of the present invention, and the technical concept of the present invention does not limit the materials, shapes, structures, arrangements, etc. of component parts to those described below. The technical concept of the present invention can be modified in various ways within the technical scope defined by the claims.

[0011] 1 is a refrigerant circuit diagram of an air conditioner 1 according to one embodiment of the present invention. The air conditioner 1 of this embodiment comprises an indoor unit 2 and an outdoor unit 3. The indoor unit 2 is provided with an indoor heat exchanger 4 that exchanges heat between the refrigerant and the indoor air. Although only the indoor heat exchanger 4 is shown on the indoor unit 2, the indoor unit 2 is also generally provided with other components, such as an indoor fan that blows the heat-exchanged air into the room and a control device that controls the indoor unit 2. The outdoor unit 3 is provided with a compressor 6, a heat exchanger unit 7, and an expansion valve 8, which are connected in sequence by refrigerant piping. In addition to the above-mentioned devices, the outdoor unit 3 is also connected with various valve mechanisms such as a four-way valve, an accumulator, and other devices, but these are omitted from Fig. 1. The outdoor unit 3 and the indoor unit 2 are connected by refrigerant piping, and a refrigerant circuit 9 is formed in which refrigerant circulates between the outdoor unit 3 and the indoor unit 2 when the compressor 6 is driven.

[0012] 2 shows the outdoor unit 3 of the air conditioner 1. The outdoor unit 3 has a box-shaped housing 10. The housing 10 is equipped with a bottom plate 11 that forms the bottom surface, a fan guard 12 that covers an air outlet provided on the front surface, a top plate 13 that forms the top surface, and a right panel 14 that forms the right side surface. Although not shown, the housing 10 is equipped with a front panel that covers the front surface excluding the fan guard 12, a left panel that forms the left side surface, a rear panel that forms the back surface, and an intake port that takes in outside air into the housing 10.

[0013] 3 shows a state in which the compressor 6 housed inside the housing 10 is fixed to the bottom plate 11. Legs 20 are joined to the lower part of the cylindrical compressor 6, and first to third leg fixing portions 30a to 30c (described later) of the legs 20 are supported by first to third compressor fixing portions 23a to 23c provided on the bottom plate 11 via first to third fastening members 22a to 22c.

[0014] Figure 4 is a view showing the leg portion 20 from the side (above) where it is joined to the compressor 6, Figure 5 is a view showing the leg portion 20 from the side as viewed from the arrow AA in Figure 4, and Figure 6 is an enlarged view of a part of Figure 5 (the leg fixing portion described later). 4, the leg 20 is a triangular plate material, and one of the first to third leg fixing portions 30a to 30c is provided at each of the three corners. Bolt insertion holes 31 are formed in the first to third leg fixing portions 30a to 30c. Here, the first to third leg fixing portions 30a to 30c correspond to the leg fixing portions of the present invention. A compressor joint 32 is formed in an area of ​​the leg 20 that is inward from the first leg fixing portion 30a to the third leg fixing portion 30c, and a through-hole 32a is formed in the center of the compressor joint 32. The lower end of the compressor 6 is placed in and joined to this through-hole 32a. As shown in FIG. 5, the compressor joint 32 is formed at a position lower than the first leg fixing portion 30a to the third leg fixing portion 30c by providing an upper surface step portion 33 at the boundary between the compressor joint 32 and the first leg fixing portion 30a to the third leg fixing portion 30c.

[0015] As shown in FIG. 5, a flange portion 34 is formed by bending the peripheral edge of the leg 20 downward between the first leg fixing portion 30a and the second leg fixing portion 30b. The flange portion 34 has a pair of first flange portions 35, a second flange portion 36, and a flange step portion 37. The first flange portion 35 is a flange extending from the leg fixing portion (the first leg fixing portion 30a or the second leg fixing portion 30b) to a position diagonally below the upper surface step portion 33, and the second flange portion 36 is disposed between the two first flange portions 35. A flange step portion 37 is provided at the connection portion between each first flange portion 35 and the second flange portion 36. The flange step portion 37 is inclined from each first flange portion 35 toward the second flange portion 36.

[0016] 6, the angle θ formed between the lower end 37a of the flange step portion 37 and the lower end 36a of the second flange portion 36 is set to be equal to or greater than 90°. A corner 38 where the flange step portion 37 and the lower end of the second flange portion 36 intersect is formed in an arc shape. Although not shown, the other flange step portion 37 and second flange portion 36 formed on the second leg fixing portion 30b side also have the same shapes as those in Fig. 6. Furthermore, while Figs. 5 and 6 have described the flange portion 34 formed on the periphery between the first leg fixing portion 30a and the second leg fixing portion 30b of the leg 20, the flange portion 34 formed on the periphery between the first leg fixing portion 30a and the third leg fixing portion 30c shown in Fig. 4 and the flange portion 34 formed on the periphery between the second leg fixing portion 30b and the third leg fixing portion 30c also have the same shapes.

[0017] 4, the leg portion 20 is formed with a plurality of band-shaped beads 41a, 41b having a concave cross-section formed by drawing. Each band-shaped bead 41a is formed between the first leg fixing portion 30a and the second leg fixing portion 30b, between the second leg fixing portion 30b and the third leg fixing portion 30c, and between the third leg fixing portion 30c and the first leg fixing portion 30a. Each band-shaped bead 41b is formed at a position sandwiched between the ends of a pair of band-shaped beads 41a near the first leg fixing portion 30a to the third leg fixing portion 30c. The band-shaped beads 41a increase the strength of the leg portion 20 against torsion, and the band-shaped beads 41b increase the strength against deformation in a direction perpendicular to the surface direction of the compressor joint 32.

[0018] Returning to FIG. 3 , the first compressor fixing portion 23a to the third compressor fixing portion 23c provided on the bottom plate 11 are formed by drawing a portion of the bottom plate 11 to protrude upward into a truncated cone shape. The strength of the first compressor fixing portion 23a to the third compressor fixing portion 23c is increased by plastically deforming the bottom plate 11 to cause work hardening (a phenomenon in which the hardness of a metal increases when stress is applied, which occurs when the metal undergoes plastic deformation). The shapes of the first compressor fixing portion 23a to the third compressor fixing portion 23c are not limited to a truncated cone shape, and other shapes may be used as long as they cause work hardening by plastically deforming the bottom plate 11 to increase the strength. A bolt insertion hole (not shown) is formed in the center of each of the first compressor fixing portion 23a to the third compressor fixing portion 23c. Here, the first compressor fixing portion 23a to the third compressor fixing portion 23c correspond to the compressor fixing portion of the present invention. 3, the first fastening member 22a is composed of a generally cylindrical elastic member 25 having a bolt through-hole, a fastening bolt 27, and a nut 29. The second fastening member 22b and the third fastening member 22c have the same configuration as the first fastening member 22a. Here, the first fastening member 22a to the third fastening member 22c correspond to the fastening members of the present invention.

[0019] To support the first fastening portion 20a of the leg portion 20 on the bottom plate 11, as shown in FIG. 7, a fastening bolt 27 is inserted from below into the bolt insertion hole 24 of the first compressor fixing portion 23a of the bottom plate 11. Next, the shaft portion 27a of the fastening bolt 27 protruding above the bottom plate 11 is inserted into the bolt insertion hole 24, and an elastic member 25 is placed. Next, the first leg fixing portion 30a of the leg portion 20 is inserted into the shaft portion 27a of the fastening bolt 27 protruding upward from the elastic member 25. Next, a nut 29 is engaged with the threaded portion of the shaft portion 27a protruding upward from the first leg fixing portion 30a. Similarly, the fastening bolt 27, elastic member 25, second leg fixing portion 30b (third leg fixing portion 30c), and nut 29 are assembled to the second compressor fixing portion 23b and third compressor fixing portion 23c of the bottom plate 11. As a result, the leg portion 20 is supported on the bottom plate 11 via the first to third fastening members 22a to 22c.

[0020] Next, Fig. 8 is a side view of a structure in which the first leg fixing portion 30a of the leg portion 20 is supported by the first compressor fixing portion 23a via the first fastening member 22a, and Fig. 9 is a top view of the structure in which the first leg fixing portion 30a is supported by the first compressor fixing portion 23a via the first fastening member 22a. Note that Fig. 9 only shows the elastic member 25 that constitutes the first fastening member 22a. Furthermore, in Figs. 8 and 9, the configuration of each component will be described by specifying the up-down, front-rear, left-right directions.

[0021] As shown in Fig. 8, a part of the first flange portion 35 is located above the first compressor fixing portion 23a of the bottom plate 11, and the leg portion 20 is fixed in a state where the second flange portion 36 is located above the upper surface 11a of the bottom plate 11 where the first compressor fixing portion 23a is not formed. The vertical distance h1 between the upper surface 11a of the bottom plate 11 and the lower end 36a of the second flange portion 36 is set smaller than the vertical distance h2 between the upper surface of the first compressor fixing portion 23a and the lower end 35a of the first flange portion 35 (h1 < h2).

[0022] The flange step portion 37 formed on the side of the first flange portion 35 continuous with the second flange portion 36 is located above the upper surface 11a of the bottom plate 11 where the first compressor fixing portion 23a is not formed. A buffer member 42 is disposed on the upper surface 11a of the bottom plate 11 located below the second flange portion 36. Specifically, the lower surface of the buffer member 42 is an adhesive surface and is attached to the upper surface 11a of the bottom plate 11. Also, the corner portion 38, which is the lower end of the flange step portion 37, is located on the side of the first compressor fixing portion 23a with respect to the boundary portion 39 with the first leg fixing portion 30a, which is the upper end of the upper surface step portion 33. Thereby, the flange height S of the flange step portion 37 on the first flange portion 35 side is sufficiently ensured.

[0023] Also, the compressor joint portion 32 is formed at a position lower than the first leg fixing portion 30a to the third leg fixing portion 30c (the side closer to the upper surface 11a of the bottom plate 11). Thereby, the center of gravity position of the compressor 6 fixing the leg portion 20 can be set low near the bottom plate 11. When the center of gravity position of the compressor 6 is set low, the amplitude of the upper part of the compressor 6 due to vibration during transportation or when the compressor 6 is driven becomes small, so that the stress caused by vibration applied to the connection portion between the compressor 6 and the piping components can be reduced. Also, the structure in which the second leg fixing portion 30b of the leg portion 20 is supported by the second compressor fixing portion 23b via the second fastening member 22b and the structure in which the third leg fixing portion 30c is supported by the third compressor fixing portion 23c via the third fastening member 22c are also the same as the structures shown in Figs. 8 and 9.

[0024] Next, the effects of the outdoor unit 3 of the air conditioner 1 of this embodiment will be described. If the outdoor unit 3 is dropped during transportation, the elastic members 25 of the first fastening members 22a to the third fastening members 22c are compressed, causing the compressor 6 and the legs 20 joined to the lower part of the compressor 6 to move toward the bottom plate 11.

[0025] The flange portion 34 has a first flange portion 35 that is partially located above the first compressor fixing portion 23a of the bottom plate 11, and a second flange portion 36 that is located above the upper surface 11a of the bottom plate 11 where the first compressor fixing portion 23a is not formed. The vertical distance h1 between the upper surface 11a of the bottom plate 11 and the lower end 36a of the second flange portion 36 is set to be smaller than the vertical distance h2 between the upper surface of the first compressor fixing portion 23a and the lower end 35a of the first flange portion 35. Therefore, the second flange portion 36 contacts the buffer member 42 provided on the upper surface 11a of the bottom plate 11 before the first flange portion 35. The contact between the second flange portion 36 and the buffer member 42 can suppress deformation of the bottom plate 11. At this time, the first flange portion 35 does not contact the first compressor fixing portion 23a through the third compressor fixing portion 23c.

[0026] Therefore, when the leg 20 moves toward the bottom plate 11, the second flange 36 first contacts the buffer member 42 provided on the bottom plate 11, preventing the leg 20 from moving further downward. The first flange 35 does not contact the first flanges 35 of the first through third compressor fixing portions 23a through 23c, thereby preventing deformation of the first through third compressor fixing portions 23a through 23c due to contact. Furthermore, preventing deformation of the first through third compressor fixing portions 23a through 23c prevents the fastening bolts 27 of the first through third fastening members 22a through 22c from tilting, thereby preventing tilting of the compressor 6. Preventing tilting of the compressor 6 also prevents damage to piping components connected to the compressor 6 during operation.

[0027] Furthermore, the flange step portions 37 formed on the sides of the first flange portions 35 of the first to third leg fixing portions 30a to 30c that are continuous with the second flange portion 36 are located above the upper surface 11a of the bottom plate 11 where the first compressor fixing portion 23a of the bottom plate 11 is not formed. Therefore, when the leg portion 20 moves toward the bottom plate 11, the flange step portions 37 do not come into contact with the first compressor fixing portion 23a to the third compressor fixing portion 23c. This makes it possible to suppress deformation of the first compressor fixing portion 23a to the third compressor fixing portion 23c due to contact with the flange step portions 37.

[0028] 10 shows a leg 20H of a comparative example in which a corner 38 at the lower end of the flange step 37 is formed at a position away from the first compressor fixing portion 23a with respect to a boundary 39 at the upper end of the upper surface step 33. The leg 20H of this comparative example does not ensure a sufficient flange height T of the flange step 37 on the first flange portion 35 side, and there is a risk that the flange step 37 will be deformed if the outdoor unit 3 is dropped.

[0029] In contrast to this, in Fig. 8, corner portion 38, which is the lower end of flange step portion 37, is located closer to first compressor fixing portion 23a than boundary portion 39, which is the upper end of upper surface step portion 33, so that flange height S of flange step portion 37 on the first flange portion 35 side can be sufficiently ensured. In other words, it is possible to form flange height S that is larger than flange height T of the comparative example shown in Fig. 10. Therefore, by forming flange step portion 37 that sufficiently ensures flange height S of flange step portion 37, leg portion 20 of the present embodiment is able to ensure sufficient strength and not easily deform even when excessive force is applied when outdoor unit 3 is dropped.

[0030] Furthermore, the angle θ formed between the lower end 37a of the flange step portion 37 of the first leg fixing portion 30a to the third leg fixing portion 30c and the lower end 36a of the second flange portion 36 is set to 90° or greater. This makes it possible to ensure a sufficient distance (the distance in the left-right direction in FIG. 7) between the first leg fixing portion 30a to the third leg fixing portion 30c and a corner portion 38 where the lower end 37a of the flange step portion 37 intersects with the lower end 36a of the second flange portion 36. As a result, even if the leg portion 20 moves toward the bottom plate 11 while tilted relative to the up-down direction, the corner portion 38 does not come into contact with the first compressor fixing portion 23a to the third compressor fixing portion 23c, preventing deformation of the first compressor fixing portion 23a to the third compressor fixing portion 23c. Furthermore, since the corner portion 38 is formed in an arc shape, damage to the bottom plate 11 can be reduced when the flange portion 34 comes into contact with the upper surface 11a of the bottom plate 11, and damage to the buffer member 42 can be reduced when the flange portion 34 comes into contact with the buffer member 42.

[0031] The present invention is not limited to the above-described embodiment, but is merely an example of the present invention. In the implementation stage, the components can be modified and embodied without departing from the spirit of the invention, and various changes and improvements can be made to the above-described embodiment. Furthermore, various inventions can be created by appropriately combining multiple components disclosed in the above-described embodiment. [Explanation of symbols]

[0032] 1. Air conditioner 2 Indoor unit 3 Outdoor unit 4 Indoor heat exchanger 6. Compressor 7 Heat Exchanger Unit 8 Expansion valve 9 Refrigerant circuit 10. Cabinet 11 Bottom plate 13 Top plate 14 Right Panel 20 Legs 22a First fastening member 22b Second fastening member 22c Third fastening member 23a First compressor fixing part 23b Second compressor fixing part 23c Third compressor fixing part 24 bolt holes 25 Elastic member 27 Fastening bolt 27a Shaft section 29 Nut 30a 1st leg fixing part 30b 2nd leg fixing part 30c 3rd leg fixing part 31 Bolt insertion hole 32 Compressor joint 32a through hole 33 Upper step 34 Flange 35 First flange 35a Lower end of first flange 36 Second flange 36a Lower end of second flange 37 Flange step 38 Corner 39 Boundary between upper step and fixed part 41a, 41b Belt-shaped beads 42 Cushioning material h1 Vertical distance between the top surface of the bottom plate and the bottom edge of the second flange h2 Vertical distance between the top surface of the compressor fixing part and the bottom end of the first flange part L Distance between the recess and the flange step θ is the angle between the bottom end of the flange step and the bottom end of the second flange

Claims

1. an outdoor unit for an air conditioner having a compressor, a housing that houses the compressor, a plurality of leg fixing portions provided on legs fixed to a lower portion of the compressor, a compressor fixing portion provided on a bottom plate of the housing at a position facing the plurality of leg fixing portions, and a fastening member that supports the legs to the bottom plate by disposing a vibration-isolating member between the leg fixing portion and the compressor fixing portion, The compressor fixing portion is formed by protruding a part of the bottom plate upward, A flange portion bent downward is formed on the periphery of the leg portion, The flange portion has a pair of first flange portions formed on the peripheries of the plurality of leg fixing portions, each of the first flange portions extending toward the adjacent leg fixing portion, and a second flange portion formed continuously between the first flange portions extending toward each other from the adjacent leg fixing portions, an upper surface of the compressor fixing portion and a lower end of the first flange portion; a first vertical distance between the upper surface of the bottom plate and the lower end of the second flange portion;

2. a flange step portion is formed in the first flange portion and is continuous with the second flange portion, 2. The outdoor unit of an air conditioner according to claim 1, wherein the flange step portion is located above the bottom plate where the compressor fixing portion is not provided.

3. a compressor joint is disposed below the leg fixing parts inside the plurality of leg fixing parts, and an upper surface step portion is formed connecting the compressor joint and the leg fixing parts, An outdoor unit for an air conditioner as described in claim 2, characterized in that the corner where the flange step portion and the lower end of the second flange portion intersect is located on the leg fixing portion side of the boundary with the leg fixing portion, which is the upper end of the upper surface step portion.

4. 4. The outdoor unit for an air conditioner according to claim 2, wherein an angle formed between the flange step portion and the lower end of the second flange portion is set to 90 degrees or more.

5. The outdoor unit for an air conditioner according to claim 2 or 3, wherein a corner where the lower ends of the flange step portion and the second flange portion intersect is formed in an arc shape.

6. 4. The outdoor unit of an air conditioner according to claim 1, wherein a buffer member is disposed on an upper surface of the bottom plate corresponding to a position below the second flange portion.

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