Outdoor unit of air conditioner

Abstract

To provide a compressor of an outdoor unit of an air conditioner capable of preventing damage of a coating film of wiring by separating vibrating piping from the wiring.SOLUTION: An outdoor unit of an air conditioner has a housing, an inside of the housing is partitioned into a blower chamber and a machine chamber by a partition plate, a compressor to which a pipe is connected is disposed in the machine chamber, an electrical component unit is disposed above the compressor, the compressor is surrounded by a first sound absorbing material, an upper end portion of the first sound absorbing material has an L-shaped slit, and a wiring drawn out from the electrical component unit is inserted into the slit and drawn from an outer side of the first sound absorbing material to an inner side of the first sound absorbing material.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] An outdoor unit of an air conditioner is equipped with a compressor, a heat exchanger, a blower fan, and other components. Among these components, the compressor generates noise during operation, requiring soundproofing measures to reduce noise. As an example, Patent Document 1 discloses a compressor 9 for an outdoor unit of an air conditioner. As shown in FIG. 11 , the compressor 9 includes an intake pipe 91, a discharge pipe 92, and a terminal box 96 to which multiple wiring lines (not shown) are connected. A noise-reducing soundproof cover 93 is attached around the compressor 9. The soundproof cover 93 surrounds the side of the substantially cylindrical compressor 9. The soundproof cover 93 is composed of a rubber sheet 94 and a sound-absorbing material 95 made of felt secured to the outer periphery of the rubber sheet 94 with a tag pin 99. Slits 97A and 97B are formed in the soundproof cover 93. When the soundproof cover 93 is wrapped around the compressor 9, a left edge 100 and a right edge 101 of the soundproof cover 93 butt together, forming a continuous slit 97 between the left edge 100 and the right edge 101. The suction pipe 91 is inserted into the slit 97 and passes through the soundproof cover 93, and the wiring (not shown) connected to the terminal box 96 is also inserted into the slit 97 and passes through the soundproof cover 93. The discharge pipe 92 and the wiring that pass through the slit 97 are drawn out to the outside of the soundproof cover 93. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-242142 (FIG. 10) Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technology disclosed in Patent Document 1, the wiring connected to the suction pipe 91 and the terminal box 96 passes through the slit 97. This means that the suction pipe 91 and the wiring are close to each other. If the wiring is loose, the wiring (a lead wire extending from a terminal box, not shown) may come into contact with the suction pipe 91. The suction pipe 91 vibrates in response to the vibrations generated when the compressor 9 operates. If the suction pipe 91 and the wiring come into contact with each other, this vibration may damage the coating on the wiring, resulting in a deterioration of its insulation. Similarly, the discharge pipe 92 and the wiring (a heater wiring, not shown) may come into contact with each other, similar to the suction pipe 91 and the wiring (a lead wire extending from a terminal box, not shown). In addition, the discharge pipe 92 vibrates during operation of the compressor 9, just like the suction pipe 91. The discharge pipe 92 also becomes hot because high-temperature refrigerant discharged from the compressor 9 passes through the discharge pipe 92. Therefore, if the discharge pipe 92 and the wiring come into contact with each other, the high temperature may cause increased damage to the coating on the wiring, further reducing its insulation. To prevent damage to the wiring coating that can occur due to such causes, it is necessary to securely separate the piping from the wiring. [Means for solving the problem]

[0005] One aspect of the present invention is an outdoor unit for an air conditioner having a housing, the interior of the housing being divided into a blower chamber and a machinery chamber by a partition plate, a compressor connected to piping is disposed in the machinery chamber, and an electrical equipment unit is disposed above the compressor, The compressor is surrounded by a first sound-absorbing material, and the upper end of the first sound-absorbing material has an L-shaped slit into which wiring drawn from the electrical equipment unit is inserted and drawn from the outside of the first sound-absorbing material to the inside of the first sound-absorbing material. [Effects of the Invention]

[0006] According to the present invention, the pipe and the wiring can be reliably separated, and damage to the coating of the wiring can be prevented. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of an outdoor unit of an air conditioner according to the present invention, viewed obliquely from above and in front thereof. [Figure 2] FIG. 2 is a perspective view of the outdoor unit as seen from diagonally above and behind. [Figure 3] FIG. 2 is a front view of the outdoor unit with the front panel removed, and with the first sound-absorbing material and the second sound-absorbing material removed. [Figure 4] FIG. 2 is a front view of the outdoor unit with a front panel removed. [Figure 5] FIG. 2 is a front view of the outdoor unit with the front panel removed and the second sound-absorbing material open. [Figure 6] FIG. 4 is an enlarged view of a portion indicated by a dashed dotted line in FIG. 3. [Figure 7] 5 is a cross-sectional view taken along the line AA in FIG. 4. [Figure 8] FIG. 8 is an enlarged view of the part indicated by the dashed dotted line in FIG. 7. [Figure 9] FIG. 6 is a partially enlarged perspective view of the second sound-absorbing material of FIG. 5 in an open state. [Figure 10] (a) is a diagram of the first sound-absorbing material when it is stretched out flat, (b) is a diagram of the second sound-absorbing material when it is stretched out flat, and (c) is a plan view of the first sound-absorbing material cover. [Figure 11] FIG. 1 illustrates a conventional technique. DETAILED DESCRIPTION OF THE INVENTION

[0008] Next, some embodiments of the present invention will be described with reference to the drawings.

[0009] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The embodiment will be described by taking as an example an outdoor unit having an air outlet on the front surface of the housing and the interior of the housing separated into a machine chamber and a heat exchanger chamber by a partition plate. It should be noted that the present invention is not limited to the following embodiment, and various modifications are possible without departing from the spirit and scope of the present invention.

[0010] Fig. 1 is a perspective view of an outdoor unit of an air conditioner according to the present invention, seen diagonally from above and at the front. Fig. 2 is a perspective view of the outdoor unit, seen diagonally from above and at the rear. The outdoor unit 1 of the air conditioner according to this embodiment (hereinafter simply referred to as "outdoor unit") is installed outdoors and is connected to one or more indoor units installed in the air-conditioned room by refrigerant piping (not shown).

[0011] The outdoor unit 1 includes a rectangular parallelepiped housing 10. In Fig. 1, the side with the front panel 11 is the front, the opposite side is the back, the surface covered by the top panel 12 is the flat surface, the opposite side with the base 13 is the bottom surface, the surface with the piping cover 14 is the left side surface, and the opposite side is the right side surface, and the X-axis direction shown in Fig. 1 is the left-right direction of the outdoor unit 1, the Y-axis direction is the front-rear direction of the outdoor unit 1, and the Z-axis direction is the up-down direction of the outdoor unit 1.

[0012] The outer shell of the housing 10 is mainly formed by processing steel plates. The front and right side of the outdoor unit 1 are covered with a front panel 11 that is L-shaped in a plan view. The left side and part of the back are covered with a left side panel 15. The top surface of the housing 10 is covered with a top plate 12, and the upper ends of the front panel 11 and the left side panel 15 are fixed with screws 8 to a peripheral edge 121 that extends downward from the periphery of the top plate 12. The lower ends of the front panel 11 and the left side panel 15 are fixed with screws 8 to the base 13. An end 151 on the rear side of the left side panel 15 is fixed with screws 8 at two points, one above and one below, to the heat exchanger end plate 24 (see FIG. 7).

[0013] A circular air outlet 16 for discharging blown air is opened on the right side of the front of the front panel 11. In front of the air outlet 16, an air outlet grill 17 made of iron or resin and formed in a lattice shape to guard against objects entering the outdoor unit 1 is arranged. An air inlet 18 punched out of the steel plate of the front panel 11 is provided on the right side of the front panel 11.

[0014] Heat exchanger 20 is exposed on the rear surface of housing 10 except for left side panel 15. The exposed surface of heat exchanger 20 is designated rear air inlet 181. A resin protective mesh 182 is arranged at rear air inlet 181. Pipe cover 14, which covers the left side surface of housing 10, has pipe connection port 141 opening on the rear side. Inside pipe cover 14, connection pipe 31 is arranged to connect refrigerant pipes that connect outdoor unit 1 and indoor units (not shown).

[0015] Next, explanation will be made with reference to Figs. 3 to 9. Fig. 3 is a front view of the outdoor unit 1 with the front panel 11 removed, and with the first sound-absorbing material 40 and second sound-absorbing material 50, which will be described later, removed. Fig. 4 is a front view of the outdoor unit 1 with the front panel 11 removed. Fig. 5 is a front view of the outdoor unit 1 with the front panel 11 removed and the second sound-absorbing material 50 opened. Fig. 6 is an enlarged view of the part shown by the dashed dotted line in Fig. 3. Fig. 7 is a cross-sectional view taken along the line AA in Fig. 4. Fig. 8 is an enlarged view of the part shown by the dashed dotted line in Fig. 7. Fig. 9 is a partially enlarged perspective view of the second sound-absorbing material 50 in Fig. 5 opened. Fig. 10(a) is a view of the first sound-absorbing material 40 stretched out flat. Fig. 10(b) is a view of the second sound-absorbing material 50 stretched out flat. Fig. 10(c) is a plan view of the first sound-absorbing material cover 44.

[0016] Inside the housing 10, a partition plate 21 is erected on the base 13. A lower end 210 on the front side of the partition plate 21 is fixed to the base 13 with screws 8, and an end edge 211 on the rear side is fixed to a heat exchanger end plate 24 with screws 8. The interior of the housing 10 is divided into a blower chamber 2 and a machine chamber 3 by the partition plate 21. A heat exchanger 20 that is L-shaped in plan view is disposed in the blower chamber 2 from the rear to the right side. The heat exchanger 20 consists of a plurality of aluminum fins 201 stacked at intervals, and a plurality of heat transfer tubes 202 that penetrate the plurality of fins 201 in the stacking direction and through which a refrigerant flows.

[0017] Furthermore, a fan support column 22 is located in the center of the blower chamber 2, in front of the heat exchanger 20. The lower end of the fan support column 22 is erected on the base 13. Although not shown, a fan support column upper plate is provided below the top plate 12 and parallel to it at the upper end of the fan support column 22, and the front side of the fan support column upper plate is screwed to the upper end of the front panel 11, with the back side of the fan support column upper plate hanging down from the upper end of the heat exchanger 20. A fan motor (not shown) is supported in the vertical center of the fan support column 22. A blower fan 23 is attached to the fan motor, which draws air in from the back and blows it out toward the front. An air outlet 16 is located in the front panel 11 at a location opposite the blower fan 23.

[0018] In the machine room 3, a compressor 30 is disposed on a base 13, and an accumulator 32 is disposed on the left side of the compressor 30. The compressor 30 and the accumulator 32 are fixed. A four-way valve unit 34 and a sub-accumulator 321 are disposed on the rear side of the compressor 30. An intake pipe 33 is disposed between the compressor 30 and the accumulator 32, connecting the accumulator 32 and the sub-accumulator 321. The four-way valve unit 34 is disposed on the rear side of the compressor 30. An electrical equipment unit 36 ​​is disposed above the compressor 30.

[0019] The base 13 supports the heat exchanger 20, the partition plate 21, the fan support 22, the front panel 11, the compressor 30, and the left side panel 15. The housing 10 is attached to the floor or to a mounting bracket (not shown) by legs 131 provided on the left and right sides of the underside of the base 13.

[0020] The compressor 30 in the machine room 3 generates noise during operation. To prevent this noise from transmitting to the surrounding area, the compressor 30 and the accumulator 32 are surrounded by a first sound-absorbing material 40. The first sound-absorbing material 40 is formed, for example, from a nonwoven fabric. The first sound-absorbing material 40 is rectangular. When the first sound-absorbing material 40 surrounds the compressor 30 and the accumulator 32 with its short sides 46 and 47 oriented vertically, the upper long side 48 is positioned above the top end of the compressor 30. The first sound-absorbing material 40 also has an overlapping surface 401 that overlaps the front sides of the compressor 30 and the accumulator 32. In FIG. 10 , a first lacing cord 410 and a second lacing cord 411 are provided along the right short side 46 of the first sound-absorbing material 40, and a third lacing cord 412 and a fourth lacing cord 413 are provided along the left short side 47. The first loop cord 410 and the second loop cord 411, and the third loop cord 412 and the fourth loop cord 413 are arranged in the vertical direction, respectively. The first sound-absorbing material 40 is wrapped around the compressor 30 and the accumulator 32 and overlapped at the overlapping surface 401, and then the upper first loop cord 410 and the third loop cord 412, and the lower second loop cord 411 and the fourth loop cord 413 are tied with strings 42, respectively, thereby surrounding and fixing the compressor 30 and the accumulator 32.

[0021] The first sound-absorbing material 40 is wrapped around the compressor 30 and the accumulator 32, overlapped at overlapping surface 401, and then secured around the compressor 30 and the accumulator 32 by tying the first buckle 410 and the third buckle 412, and the second buckle 411 and the fourth buckle 413 with strings 42. The first sound-absorbing material 40 has an L-shaped slit 43 in its upper end 49. In this embodiment, the slit 43 is provided in the upper end 49 near the third buckle 412. The slit 43 has a first slit portion 430 cut vertically downward from the upper long side 48 of the first sound-absorbing material 40, a second slit portion 431 cut horizontally from the bottom end of the first slit portion 430 toward the right short side 46, and a third slit portion 432 which is a circular hole formed at the right end of the second slit portion 431.

[0022] In the slit 43, two wires 37, wires 371 and 372, which are pulled out from the electrical equipment unit 36 ​​located above the compressor 30, are inserted into the first slit portion 430 from the long side 48 of the first sound-absorbing material 40, guided to the second slit portion 431, and fastened to the third slit portion 432.

[0023] The first sound-absorbing material 40 has cutouts 402 at the corners of the short side 46 and the long side 48. When the first sound-absorbing material 40 surrounds the compressor 30 and the accumulator 32, the cutouts 402 are located on the back side of the slits 43. The presence of the cutouts 402 eliminates the overlapping surface 401 on the back side of the slits 43. The wiring 37 only needs to be inserted into the slits 43, so the wiring 37 can be easily secured in the third slits 432. The third slits 432 are also slightly smaller than the sum of the diameters of the wiring 371 and the wiring 372. This allows the two wirings to be sandwiched between the third slits 432 and secured in place in the third slits 432. The shape of the cutouts 402 is not limited to the rectangular shape shown in FIG. 10 , where the corners are cut off, but may also be cut off in an oblique or arc shape.

[0024] The wiring 37, which is secured by the third slit portion 432 of the first sound-absorbing material 40, is drawn from the outside of the first sound-absorbing material 40 to the inside of the first sound-absorbing material 40. One of the wirings 37, wiring 371, is connected to a discharge temperature sensor 38 fixed to the discharge pipe 35 connected to the upper end of the compressor 30, and the other wiring 372 is connected to a solenoid valve temperature sensor 39 fixed to the side surface of the compressor 30. Note that although two wirings 37 are used in this embodiment, the number of wirings 37 may be one or more.

[0025] The top surface of the first sound-absorbing material 40 that surrounds the compressor 30 and the accumulator 32 is open. The top surface of the first sound-absorbing material 40 is covered with a first sound-absorbing material lid 44 that is formed to match the planar shape of the opening. The first sound-absorbing material lid 44 has piping outlets 45 that match the discharge piping 35 that connects to the compressor 30 and the suction piping 33 that connects to the accumulator 32. The discharge piping 35 and the suction piping 33 are exposed inside the machine room 3 above the first sound-absorbing material lid 44 from the first sound-absorbing material 40 and first sound-absorbing material lid 44 that surround the compressor 30.

[0026] Furthermore, second sound-absorbing material 50 surrounds first sound-absorbing material 40, which surrounds compressor 30 and accumulator 32, and sub-accumulator 321 and four-way valve unit 34 on the rear side of compressor 30. Second sound-absorbing material 50 is formed, for example, from non-woven fabric. Second sound-absorbing material 50 is rectangular, and when second sound-absorbing material 50 surrounds first sound-absorbing material 40 and the surrounding sub-accumulator 321 and four-way valve unit 34 with short sides 53 and 54 oriented vertically, its upper long side 55 is located below electrical equipment unit 36. Second sound-absorbing material 50 has fixing piece 51 protruding in the shape of a rounded rectangle on short side 53, and cutout 52 on the inside of short side 54, the height of which is aligned with fixing piece 51. The second sound-absorbing material 50 surrounding the first sound-absorbing material 40 and the sub-accumulator 321 and four-way valve unit 34 around it is fixed by inserting a fixing piece 51 into a cut hole 52.

[0027] With the above configuration, the first sound-absorbing material 40 is rectangular, and when it surrounds the compressor 30 and accumulator 32 with its short sides 46, 47 oriented vertically, its upper long side 48 is located above the upper end of the compressor 30. After being wrapped around the compressor 30 and accumulator 32 and overlapping them at overlapping surface 401, the first lashing cord 410 and third lashing cord 412 on the upper side and the second lashing cord 411 and fourth lashing cord 413 on the lower side are tied together with strings 42, and the first sound-absorbing material 40 is fixed around the compressor 30 and accumulator 32, and has an L-shaped slit 43 at its upper end near the third lashing cord 412. As described above, the slit 43 has a first slit portion 430 cut vertically downward from the upper long side 48 of the first sound-absorbing material 40, a second slit portion 431 cut horizontally from the lower end of the first slit portion 430 toward the right short side 46, and a third slit portion 432 which is a circular hole formed at the right end of the second slit portion 431. In the slit 43, two wires 37, wires 371 and 372, which are drawn from the electrical equipment unit 36 ​​arranged above the compressor 30 toward the compressor 30, are inserted into the first slit portion 430 from the long side 48 of the first sound-absorbing material 40, are guided to the second slit portion 431 and are fastened to the third slit portion 432.

[0028] At this time, it is preferable that the wiring 37 located between the electrical component unit 36 ​​and the third slit portion 432 is arranged so as not to sag unnecessarily. As a result, as shown in Figures 5 and 9 when the outdoor unit 1 is viewed from the front, the wiring 37 that is drawn out from the electrical component unit 36 ​​and drawn through the third slit portion 432 into the internal space 3a surrounded by the first sound-absorbing material 40 and the first sound-absorbing material lid 44 can be reliably separated from the first sound-absorbing material 40 and first sound-absorbing material lid 44 that surround the compressor 30 and from the suction pipe 33 and discharge pipe 35 that are exposed in the machine room 3 above the first sound-absorbing material lid 44. As a result, contact between the wiring 37 and the suction pipe 33 or the discharge pipe 35 can be prevented, and damage to the coating of the wiring 372 can be prevented. Furthermore, by fastening the wiring 37 to the third slit portion 432, the slack of the wiring 37 can be appropriately adjusted from the third slit portion 432 until it is drawn into the internal space 3a surrounded by the first sound-absorbing material 40 and the first sound-absorbing material lid 44 and connected to the discharge thermistor 38 and the solenoid valve thermistor 39. This prevents the wiring 37 from coming into contact with the suction pipe 33, the discharge pipe 35, the main body of the compressor 30, and other parts that vibrate or become hot due to the operation of the compressor 30 inside the space surrounded by the first sound-absorbing material 40 and the first sound-absorbing material lid 44, and prevents damage to the coating of the wiring 372.

[0029] The first sound-absorbing material 40 has cutouts 402 at the corners of the short side 46 and the long side 48. When the first sound-absorbing material 40 surrounds the compressor 30 and the accumulator 32, the presence of the cutouts 402 means that there is no overlapping surface 401 on the back side of the slit 43, so the wiring 37 can be easily fastened to the third slit 432.

[0030] The end of the wiring 37 secured by the third slit portion 432 enters the inside of the first sound-absorbing material 40, and one of the wirings 37, wiring 371, is connected to a discharge temperature sensor 38 fixed to a discharge pipe 35 connected to the upper end of the compressor 30, and the other wiring 372 is connected to a solenoid valve temperature sensor 39 fixed to the lower side of the compressor 30. The third slit portion 432 is positioned so that the accumulator 32 and pipes are not located on an imaginary line L connecting the third slit portion 432 and the discharge temperature sensor 38 at the shortest distance. This allows the end of the wiring 371 secured by the third slit portion 432 to be routed so as not to come into contact with the accumulator 32 or pipes. The same applies to the wiring 372.

[0031] The upper end of the first sound-absorbing material 40 is covered with a first sound-absorbing material cover 44 that matches the planar shape of the first sound-absorbing material 40 when it surrounds the compressor 30 and the accumulator 32 .

[0032] Furthermore, the second sound-absorbing material 50 surrounds the first sound-absorbing material 40 surrounding the compressor 30 and accumulator 32, and the four-way valve unit 34 therearound, thereby preventing noise and vibration. [Explanation of symbols]

[0033] 1: outdoor unit, 10: housing, 11: front panel, 12: top plate, 121: peripheral part, 13: base, 131: legs, 14: piping cover, 141: piping connection port, 15: left side panel, 151: end, 16: air outlet, 17: air outlet grill, 18: air intake, 181: rear air intake, 182: protective net 2: Fan chamber, 20: Heat exchanger, 201: Fin, 202: Heat transfer tube, 21: Partition plate, 22: Fan support, 23: Blower fan, 24: Heat exchange end plate 3: Machine room, 3a: Internal space, 30: Compressor, 31: Connection piping, 32: Accumulator, 321: Sub-accumulator, 33: Suction piping, 34: Four-way valve unit, 35: Discharge piping, 36: Electrical equipment unit, 37 / 371 / 372: Wiring, 38: Discharge thermistor, 39: Solenoid valve thermistor 40: first sound-absorbing material, 401: overlapping surface, 402: notch, 410: first string, 411: second string, 412: third string, 413: third string, 42: string, 43: slit, 430: first slit portion, 431: second slit portion, 432: third slit portion, 44: first sound-absorbing material cover, 45: piping outlet, 46 / 47: short side, 48: long side, 49: upper end portion 50: Second sound absorbing material, 51: Fixing piece, 52: Cutting hole, 53 / 54: Short side, 55: Long side 8: Screw 9: Compressor, 91: Intake pipe, 92: Discharge pipe, 93: Soundproof cover, 94: Rubber sheet, 95: Sound absorbing material, 96: Terminal box, 97 / 97A / 97B: Slit, 99: Tag pin L: Virtual line

Claims

1. An outdoor unit for an air conditioner having a housing, the interior of which is divided into a blower chamber and a machinery chamber by a partition plate, a compressor connected to piping is disposed in the machinery chamber, and an electrical equipment unit is disposed above the compressor, An outdoor unit for an air conditioner, characterized in that the compressor is surrounded by a first sound-absorbing material, the upper end of the first sound-absorbing material has an L-shaped slit, and wiring pulled out from the electrical equipment unit is inserted into the slit and pulled from the outside of the first sound-absorbing material to the inside of the first sound-absorbing material.

2. 2. The outdoor unit of an air conditioner according to claim 1, wherein the first sound-absorbing material also surrounds an accumulator disposed adjacent to the compressor.

3. An outdoor unit for an air conditioner as described in claim 1 or 2, characterized in that the upper surface of the first sound-absorbing material is covered with a first sound-absorbing material cover having a cutout portion for a piping outlet that is aligned with the piping connected to the compressor.

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