JP5736538B2 - Compressor fixing structure - Google Patents

Description

  The present invention relates to a fixing structure for a compressor mounted on an outdoor unit of an air conditioner.

  2. Description of the Related Art Conventionally, a hermetic compressor is known that is mounted on an outdoor unit of an air conditioner and contains an electric element and a rotary compression element that is driven by the electric element and compresses a refrigerant in a hermetic container. This type of compressor is provided with a plurality of leg pieces provided at the lower end of the sealed container fixed to the bottom plate of the outdoor unit. In general, an anti-vibration member is interposed between the leg piece and the bottom plate so that vibration generated in the sealed container when the compressor is driven is not transmitted to the bottom plate (see, for example, Patent Document 1). ).

JP 2009-162120 A

By the way, in order to efficiently absorb vibration during rotation of the compressor with this type of vibration isolating member, at least one of the shape, material and hardness of the vibration isolating member is matched to the capacity and shape of the compressor. It was necessary to adjust one. For this reason, it is necessary to prepare a plurality of dedicated mounting rubbers for each model with different standard hardness, and the mounting rubber cannot be made into a common component, leading to an increase in manufacturing costs.
The present invention has been made in view of the above-described circumstances, and provides an air conditioner that can efficiently prevent vibration of a compressor and reduce vibration transmission to a bottom plate with a simple configuration. With the goal.

In order to achieve the above object, the present invention provides a compressor fixing structure in which an electric element and a rotary compression element that is driven by the electric element and compresses a refrigerant are contained in a sealed container. The leg piece is interposed between the leg piece portion and the bottom plate of the compressor and supported by an elastic member having a neck portion penetrating the leg piece portion upward, and the elastic member is inserted from above the neck portion, and the leg piece Part, the elastic member, and a fastener that penetrates the bottom plate, and is disposed inside the elastic member so as to surround the fastener, the lower end abuts on the bottom plate side, and the upper end of the fastener The collar is separated from the head side and is harder than the elastic member, the collar can absorb the start-up vibration of the compressor, and the fastener is pushed in between the bottom plate and the elastic member. When tightened Characterized in that the hardness of the wood with an adjustable elastic sheet.

In this configuration, the hardness of the elastic member may be adjusted by changing the thickness of the elastic sheet. Moreover, the said elastic sheet is good also as a structure currently formed from the member harder than the said elastic member. Further, the collar may be configured such that a lower end thereof is disposed in contact with the elastic sheet. Further, the bottom plate includes a fastening hole through which the fastener passes, and a nut welded to a position where the fastening hole is provided, and tightens a screw portion of the fastener to the nut to the maximum, It is good also as a structure which fixes a leg piece part to the said baseplate.

  According to the present invention, the collar that absorbs the starting vibration of the compressor is enclosed inside the elastic member so as to be separated from the head portion of the fastener for fixing the leg piece to the bottom plate. Because it is arranged, the push-in depth of the elastic member is not regulated by the height of the collar, and the push-in depth of the elastic member is adjusted to adjust the hardness of the elastic member according to the compressor to be mounted. It is possible to adjust the hardness, and with a simple configuration, it is possible to efficiently prevent vibrations of the compressor and reduce vibration transmission to the bottom plate.

It is a fragmentary perspective view of the outdoor unit which shows the arrangement configuration of the fixed structure of the constant speed compressor which concerns on this embodiment. It is a fragmentary perspective view of the outdoor unit which shows the fixed structure of a constant speed compressor. It is sectional drawing which shows the arrangement configuration of a leg piece part, an elastic member, a volt | bolt, and a control member. FIG. 6 is an exploded view showing an arrangement configuration of each member of the fixing structure 7.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the code | symbol 2 shows the outdoor unit of an air conditioning apparatus. This outdoor unit 2 includes a plurality of constant capacity type constant speed compressors (AC compressors) 11, a variable capacity type inverter compressor (DC inverter compressor) 12, and a four-way valve 15. Although omitted, it is generally composed of an accumulator, an oil separator, an outdoor heat exchanger, an outdoor expansion valve, a receiver tank, and the like, and is connected to the indoor unit by a gas pipe and a liquid pipe.
The constant speed compressor (compressor) 11 is a hermetic scroll compressor, and is housed in a hermetic container 61 and an electric element (which is housed in the hermetic container 61 and driven at a substantially constant rotational speed depending on the power source frequency. And a rotary compression element (not shown) that is driven by the electric element and compresses the refrigerant. The sealed container 61 is a cylindrical container that is long in the height direction, and a plurality of leg pieces 62 extending radially are provided at the lower portion of the sealed container 61.

The compressor 11 is provided with these leg pieces 62 fixed to the bottom plate 10 of the outdoor unit 2 with a fixing structure 7 which will be described in detail later. The leg piece portion 62 includes a mount rubber (elastic member) 63, a rubber sheet (elastic sheet) 73, and a reinforcing plate 72 interposed between the leg piece portion 62 and the bottom plate 10, and a bolt 65 with a flat washer 64. The bolt 65 is screwed into the bottom plate 10 and fixed to the bottom plate 10.
Rotational driving of the compressor 11 causes rotational vibration in the sealed container 61. The mount rubber 63 is interposed between the leg piece 62 and the bottom plate 10 so as not to transmit the vibration generated in the sealed container 61 to the bottom plate 10. Since the amplitude of the vibration generated in the sealed container 61 varies depending on the capacity and shape of the compressor 11, in order to effectively prevent the vibration of the sealed container 61 from being transmitted to the bottom plate 10, It is necessary to adjust the hardness of the mount rubber 63 according to the capacity and shape of each compressor 11.

  As shown in FIG. 2, a rubber sheet (elastic sheet) 73 and a reinforcing plate 72 are interposed between the mount rubber 63 and the bottom plate 10. The reinforcing plate 72 is formed in a substantially L shape, is in contact with a part of the upper surface and the front surface of the bottom plate 10, and is screwed into the bottom plate 10. In addition, a plate-type reinforcing plate (not shown) is screwed to the bottom plate 10 at the position of the leg piece 62 provided at the rear in the drawing. Each reinforcing plate 72 is formed thicker than the thickness of the bottom plate 10, and increases the strength of the screwed portion between the bolt 65 and the bottom plate 10.

FIG. 3 is a cross-sectional view showing an assembly structure when the leg piece 62 of the compressor 11 is fixed to the bottom plate 10 by the fixing structure 7. The fixing structure 7 includes a mount rubber 63, a bolt 65, a collar (regulating member) 70, and a rubber sheet 73.
The leg piece portion 62 includes an upper surface portion 62A and a side surface portion 62B extending downward from the edge portion of the upper surface portion 62A, and the side surface portion 62B and the upper end portion of the mount rubber 63 are overlapped in a side view. It has become. Accordingly, the mount rubber 63 moves following the operation of the sealed container 61 and the leg piece 62, suppresses the vibration of the sealed container 61, and prevents the vibration of the sealed container 61 from being transmitted to the bottom plate 10. .

  The compressor 11 operates at a constant speed depending on the power supply frequency. Therefore, when the compressor 11 is started up, a large torque is generated in the sealed container 61 of the compressor 11 in order to rapidly follow the predetermined rotational speed. Due to this torque, a vibration with a large amplitude in the rotational direction is generated in the sealed container 61. As described above, the mount rubber 63 is interposed between the leg piece portion 62 of the sealed container 61 and the bottom plate 10, and the mount rubber 63 functions to suppress vibration of the compressor 11. However, when a large rotational torque is generated in the sealed container 61 at the time of startup, the mount rubber 63 is greatly deformed, and a great stress is applied to the suction pipe, the discharge pipe, and the oil pipe connected to the sealed container 61.

Therefore, a collar 70 is interposed between the mount rubber 63 and the bolt 65 so as to surround the bolt 65. The collar 70 regulates deformation of the mount rubber 63 in the shearing direction due to rotational torque acting on the sealed container 61 when the compressor 11 is started up, and relaxes stress concentration on the bolt 65.
The bolt 65 is an intermediate bolt that is threaded by a specific length from the tip of the shaft portion 65b. The bolt 65 is a standard product (commercially available product) in which the length of the threaded portion 65c is determined by the JIS standard with respect to the screw diameter of the bolt 65 and the length of the shaft portion 65b. When the bolt 65 is tightened up to the upper limit at which the screw of the threaded portion 65c is cut off, the screw 65 is not cut any further and therefore cannot be tightened.

  The collar 70 is formed of a metal such as iron, and the base portion 70B located on the bottom plate 10 side is provided with a thicker convex shape than the tip portion 70C located on the leg piece portion 62 side of the sealed container 61. ing. Further, the hole 70A provided in the center of the collar 70 is formed to have a diameter slightly larger than the diameter of the thread portion of the bolt 65, and the bolt 65 is loosely fitted. The collar 70 is mounted so that the front end (upper end) 70C of the collar 70 is separated from the lower surface of the flat washer 64 provided on the head side of the bolt 65 when the bolt 65 is tightened to the maximum. The rubber 63 is formed shorter than the height.

  The mount rubber 63 includes a through hole 63A formed in the same shape as the collar 70, and the collar 70 is fitted into the through hole 63A. A neck portion 63B is formed on the upper portion of the mount rubber 63, and this neck portion 63B is provided so as to protrude from an opening 62C provided in the upper surface portion 62A of the leg piece portion 62. The mount rubber 63 is provided with a shoulder 63C extending to the neck 63B, and a leg piece 62 is mounted on the shoulder 63C. As a result, when the sealed container 61 and the leg piece 62 are operated, the leg piece 62 swings so that the edge of the opening 62C does not touch the bolt 65, and the contact between the leg piece 62 and the bolt 65 is prevented. This prevents an excessive shearing force from acting on the bolt 65.

  In addition, a gap is provided between the opening 62C and the mount rubber 63, and the opening 62C is provided so that this gap is maintained even when the sealed container 61 and the leg piece 62 are operated. Thus, the mount rubber 63 is not scraped. Further, when the sealed container 61 and the leg piece portion 62 are operated, the rotational torque is transmitted to the mount rubber 63 via the leg piece portion 62, whereby the mount rubber 63 receives stress from the side face portion 62B. . Since this stress is transmitted to the collar 70 and dispersed, the deformation of the mount rubber 63 can be restricted.

  Further, an O-ring 71 is inserted into the neck portion 63B of the portion protruding from the opening 62C. The O-ring 71 is formed of rubber harder than the mount rubber 63 and is provided so as to be interposed between the flat washer 64 and the upper surface portion 62 </ b> A of the leg piece portion 62. The O-ring 71 is provided so that the metal leg piece 62 and the flat washer 64 do not come into direct contact when an upward force is applied to the leg piece 62 during transportation or the like. Accordingly, it is possible to prevent a large impact load from being applied to the leg piece portion 62, and it is possible to reduce the impact stress applied to the leg piece portion 62 or the bolt 65.

  The bottom plate 10 is provided with a fastening hole 10A through which the bolt 65 passes, and a nut 74 for screwing the bolt 65 is welded to the bottom plate 10 at a position where the fastening hole 10A is provided. When the compressor 11 is fixed to the bottom plate 10, the reinforcing plate 72 is disposed on the bottom plate 10, and the rubber sheet 73 is disposed on the reinforcing plate 72. The rubber sheet 73 is formed in a substantially circular shape, and a hole 73a through which a bolt 65 for fixing the compressor 11 to the bottom plate 10 passes is formed in a substantially center. The rubber sheet 73 is disposed on the reinforcing plate 72 by aligning the hole 73a with the position where the fastening hole 10A is formed.

  As shown in FIG. 4, the collar 70 is inserted into the through hole 63 </ b> A from below the mount rubber 63. The mount rubber 63 and the collar 70 are arranged on the rubber sheet 73 so that the hole 70A provided in the center of the collar 70 and the hole 73a are aligned. At this time, the collar 70 is provided such that the lower end surface of the collar 70 is in contact with the upper surface of the rubber sheet 73. According to this configuration, the rubber sheet 73 is interposed between the collar 70 and the reinforcing plate 72, and vibration generated in the sealed container 61 of the compressor 11 and transmitted to the collar 70 is absorbed by the rubber sheet 73. Thus, it is not transmitted to the reinforcing plate 72.

  The leg piece 62 has a mount rubber 63 such that the neck 63B of the mount rubber 63 protrudes from the opening 62C of the leg piece 62, and the upper face portion 62A of the leg piece 62 rests on the shoulder 63C of the mount rubber 63. Placed on top. An O-ring 71 is loosely fitted to the neck 63B of the mount rubber 63 protruding from the opening 62C of the leg piece 62, and a bolt 65 fitted with a flat washer 64 is inserted into the hole 70A from above through the O-ring 71. Is inserted and inserted. The bolt 65 is tightened to the maximum by the nut 74 welded to the bottom plate 10 so as to reach the upper limit at which the threaded portion 65c is broken. As a result, the leg piece 62 is fastened and fixed to the bottom plate 10 via the mount rubber 63, and the vibration of the compressor 11 is absorbed by the mount rubber 63 and is not transmitted to the bottom plate 10.

  The rubber sheet 73 is formed to have a predetermined thickness so that when the bolt 65 is tightened to the maximum, the mount rubber 63 has a good hardness. The rubber sheet 73 is formed of a hard rubber material having a standard hardness than that of the mount rubber 63.

  As shown in FIG. 4, the rubber sheet 73 may include a slit 73 b provided from the outer periphery of the rubber sheet 73 toward the hole 73 a. According to this configuration, for example, even after the compressor 11 is fixed to the bottom plate 10 with the bolt 65 via the mount rubber 63, the bolt 65 is loosened, the mount rubber 63 is lifted, and the rubber sheet 73 is moved sideways from the slit 73b. The bolt 65 can be inserted into the hole 73a so as to slide from the side. Therefore, this rubber sheet 73 can be mounted on a model that has already been installed.

Incidentally, the hardness of the mount rubber 63 depends on the type of rubber material forming the mount rubber 63, the shape of the mount rubber 63, and the spring constant of the mount rubber 63. Therefore, the hardness of the mount rubber 63 formed in the same shape using the same member can be adjusted by changing the push-in depth of the mount rubber 63.
The push-in depth of the mount rubber 63 when the bolt 65 is tightened to the maximum is adjusted by changing the thickness of the rubber sheet 73 interposed between the mount rubber 63 and the bottom plate 10. A plurality of types of rubber sheets 73 having different thicknesses are prepared, and the thickness of the rubber sheet 73 is adjusted for each model. Since the push-in depth of the mount rubber 63 changes depending on the thickness of the rubber sheet 73, the hardness of the rubber sheet 63 can be adjusted by changing the thickness of the rubber sheet 73. Since the rubber sheet 73 is formed of a harder rubber material than the mount rubber 63, even if the mount rubber 63 is pressed against the bottom plate 10, the rubber sheet 73 is not deformed and is maintained at a predetermined thickness. Therefore, the hardness of the mount rubber 63 can be accurately adjusted by changing the thickness of the rubber sheet 73.
According to these configurations, the hardness of the mount rubber 63 can be adjusted to a good hardness by tightening the standard bolt 65c to the maximum using the same mount rubber 63. Therefore, since it is not necessary to use a dedicated mount rubber 63 and nonstandard bolt 65 for each compressor, it is possible to prevent manufacturing errors and reduce manufacturing costs.

The amount of push-in of the mount rubber 63 can be adjusted by changing the length of the threaded portion 65c of the bolt 65. The bolt 65 is manufactured exclusively for each compressor by changing the length of the threaded portion 65c according to each compressor. In this case, the rubber sheet 73 is formed to have a prescribed thickness so that the vibration of the collar 70 is not transmitted to the bottom plate 10. The push-in depth of the mount rubber 63 is determined by the length of the screw portion 65c. The length of the screw portion 65c is such that the hardness of the mount rubber 63 is good when the bolt 65 is tightened to the maximum. Is set to be
According to this configuration, it is not necessary to manage the tightening torque of the bolt 65 at the time of assembly work, and the bolt 65 is tightened to the maximum so as to reach the upper limit at which the threaded portion 65c is cut off. Since the hardness improves, manufacturing errors can be prevented.

  The height of the collar 70 is shorter than the height of the mount rubber 63 so that the tip 70C of the collar 70 does not hit the flat washer 64 even when the mount rubber 63 is pushed in to the maximum. Therefore, even if the push-in depth of the mount rubber 63 is increased in accordance with the compressor 11 to be mounted and the mount rubber 63 is adjusted to have a good hardness, the tip 70C of the collar 70 does not hit the flat washer 64. . According to this configuration, the push-in depth of the mount rubber 63 is not restricted by the collar 70, and the mount rubber 63 can be pushed in until the mount rubber 63 has a good hardness. Therefore, the mount rubber 63 can be commonly used as a vibration isolating rubber for a wide variety of compressors 11.

Further, since the collar 70 is formed in a convex shape, even if the collar 70 is formed shorter than the height of the mount rubber 63, the bolt 65 is attached by the through-hole 63 </ b> A of the mount rubber 63 formed in substantially the same shape as the collar 70. When tightened, the base portion 70B of the collar 70 is held down. Thus, the collar 70 is held in a state where the lower end surface of the collar 70 is held down against the upper surface of the rubber sheet 73 without moving due to the vibration of the compressor 11. For this reason, at the time of start-up, the mounting rubber 63 is applied to the mounting rubber 63 by the rotational torque of the compressor 11, and in particular the force in the shearing direction that increases around the fastening portion with the bottom plate 10 is efficiently absorbed by the collar 70. Can be suppressed.
Further, since the bolt 65 is configured to pass through the hole 70A of the collar 70 inserted into the through hole 63A of the mount rubber 63, the bolt 65 and the mount rubber 63 are not in direct contact. Therefore, even if the rotational torque acting on the sealed container 61 at the time of starting the compressor 11 causes a large torsional deformation in the mount rubber 63 via the leg piece 62, this prevents the tightening force of the bolt 65 from increasing or loosening. can do.

  As described above, according to the present embodiment, the leg piece 62 of the compressor 11 and the bottom plate 10 are prevented from transmitting vibration generated in the sealed container 61 of the compressor 11 to the bottom plate 10 by driving the compressor 11. The collar 70 disposed inside the mount rubber 63 is formed of a member harder than the mount rubber 63 so that the mount rubber 63 interposed between the base plate 10 and the base plate 10 is not deformed, and the leg pieces 62 are fixed to the bottom plate 10. It arrange | positions so that it may space apart from the head part of the volt | bolt 65 for doing. Therefore, the push-in depth of the mount rubber 63 is not restricted by the height of the collar 70. Therefore, by adjusting the indentation depth, the mount rubber 63 that can adjust the hardness can be indented and provided with a hardness that is good in accordance with the capacity of the compressor 11 that is mounted. .

  Further, according to the present embodiment, since the rubber sheet 73 capable of adjusting the hardness of the mount rubber 63 when the bolt 65 is tightened to the maximum between the bottom plate 10 and the mount rubber 63, the mount rubber 63 is provided. Since the mounting rubber 63 can be made a common component among different models and the hardness of the mounting rubber 63 can be adjusted by the rubber sheet 73 without manufacturing a plurality of types dedicated to each model, the manufacturing cost can be reduced. it can. Moreover, since the JIS standard (commercially available) bolt 65 can be used, it is not necessary to manufacture a non-standard bolt 65 for each model, and an increase in manufacturing cost can be prevented. Further, since the mount rubber 63 has a good hardness when the bolt 65 is tightened to the maximum, it is not necessary to manage the torque of the bolt 65 in the manufacturing process, improving the assembly work efficiency and producing a manufacturing error. Can be prevented.

  Further, since the hardness of the mount rubber 63 can be adjusted by using a rubber sheet 73 having a different thickness, the hardness of the mount rubber 63 can be adjusted only by finely adjusting the thickness of the rubber sheet 73 for each model. The hardness of the compressor 11 can be adjusted according to the model, and the compressor 11 can be efficiently shaken. Therefore, the vibration of the compressor 11 is transmitted to the bottom plate 10 with a simple structure. Can be prevented.

  Further, since the rubber sheet 73 is formed of a member having a hardness higher than that of the mount rubber 63, even if a large load is applied to the mount rubber 63 in the vertical direction in order to adjust the push-in depth of the mount rubber 63. The rubber sheet 73 is not deformed. Therefore, the push-in depth of the mount rubber 63 can be adjusted only by the thickness of the rubber sheet 73 without taking the deformation amount of the rubber sheet 73 into account, and the mount rubber 63 can be efficiently compressed with a simple structure. It is possible to adjust the hardness to 11 that can be shaken.

  Further, since the lower end of the collar 70 is disposed on the bottom plate 10 in contact with the rubber sheet 73, the vibration transmitted from the compressor 11 to the collar 70 can be absorbed by the rubber sheet 73. Transmission to the bottom plate 10 can be prevented.

  The bottom plate 10 includes a fastening hole 10A through which the bolt 65 penetrates, and a nut 74 welded to the position of the fastening hole 10A. The screw 65c of the bolt 65 is fastened to the nut 74 to the maximum, and the leg piece 62 Therefore, when the bolt 65 is tightened, it is not necessary to suppress the nut 74 from the lower side. Further, the fixing operation of the leg piece 62 of the compressor 11 to the bottom plate 10 is completed by merely tightening the bolt 65 to the nut 74 without considering the insertion depth of the bolt 65 and the tightening torque of the bolt 65. Therefore, assembly work efficiency can be improved, and manufacturing errors can be reduced.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to this. In the present embodiment, the fixing structure 7 is configured to fix the constant speed compressor 11 that generates a large torque in the sealed container 61 at the time of start-up. However, the configuration is not limited thereto, and the inverter compressor 12 is also fixed. The structure 7 may be fixed.

2 Outdoor unit 7 Fixed structure 10 Bottom plate 10A Fastening hole 11 Constant speed compressor (compressor)
12 Inverter compressor 61 Sealed container 62 Leg piece 63 Mount rubber (elastic member)
63A Through-hole 63B Neck 65 Bolt (fastener)
70 Color 70C Tip (upper end)
73 Rubber sheet (elastic sheet)
74 nuts

Claims (5)

In a fixed structure of a compressor that houses an electric element in a sealed container and a rotary compression element that is driven by the electric element and compresses the refrigerant,
The compressor is interposed between a leg piece portion and a bottom plate of the compressor, and is supported by an elastic member including a neck portion penetrating the leg piece portion upward,
The elastic member is inserted from above the neck, and is joined by a fastener that penetrates the leg piece, the elastic member, and the bottom plate,
An inner side of the elastic member is disposed so as to surround the fastener, and a lower end abuts on the bottom plate side, an upper end is separated from a head side of the fastener, and a collar harder than the elastic member is provided. ,
The collar can absorb the start-up vibration of the compressor,
A compressor fixing structure comprising an elastic sheet capable of adjusting the hardness of the elastic member when the fastener is tightened to a maximum pressing depth between the bottom plate and the elastic member . The structure for fixing a compressor according to claim 1 , wherein the hardness of the elastic member is adjusted by changing the thickness of the elastic sheet. The compressor fixing structure according to claim 1 , wherein the elastic sheet is formed of a member harder than the elastic member. The compressor fixing structure according to any one of claims 1 to 3 , wherein a lower end of the collar is disposed in contact with the elastic sheet. The bottom plate includes a fastening hole through which the fastener passes, and a nut welded to a position where the fastening hole is provided, and a screw portion of the fastener is fastened to the nut to the maximum, and the leg piece The compressor fixing structure according to any one of claims 1 to 4 , wherein the portion is fixed to the bottom plate.

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