JP2017201141A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent corrosion due to salt water on a joint surface of each housing member, while suppressing an increase in a manufacturing cost, in a compressor which has a housing composed of a plurality of housing members.SOLUTION: In a housing 10 of a compressor 1, a front housing 11 and a center housing 12 are joined with each other on joint surfaces, and a center housing 12 and a rear housing 13 are joined with each other on joint surfaces. A joining portion 10a between the front housing 11 and the center housing 12 on a housing outer surface is covered by a covering member 61, and a joining portion 10b between the center housing 12 and the rear housing 13 on the housing outer surface is covered by a covering member 62. The covering members 61 and 62 are pasted on the housing outer surface respectively across the joining portion 10a and the joining portion 10b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a compressor, and more particularly to a compressor having a housing composed of a plurality of housing members.

  As an example of this type of compressor, an electric compressor described in Patent Document 1 is known. In the electric compressor described in Patent Document 1, the housing includes a front case that houses the compression mechanism, a motor case that houses the electric motor, and a frame that is disposed between the front case and the motor case. Are fastened to each other by bolts. Between the end surface of the front case and one end surface of the frame and between the end surface of the motor case and the other end surface of the frame are sealed by O-rings arranged in an inner and outer double.

JP 9-42156 A

  However, in the electric compressor, it is still necessary to ensure a sufficient surface pressure between the end faces in order to prevent corrosion of the end faces due to intrusion of salt water or the like between the end faces. For this reason, the number of necessary bolts is inevitably increased, and the tightening torque of each bolt is also required to be managed, resulting in an increase in manufacturing cost.

  In addition, such a subject is not restricted to the said electric compressor, It is common to the compressor which has the housing comprised from the several housing member.

  Therefore, an object of the present invention is to prevent corrosion due to salt water or the like on the joint surfaces of the housing members while suppressing an increase in manufacturing cost in a compressor having a housing composed of a plurality of housing members.

  According to one aspect of the present invention, a compressor including a housing and a compression mechanism housed in the housing is provided. In the compressor, the housing includes a first housing member and a second housing member in which the joint surfaces are joined to each other. A joint portion between the first housing member and the second housing member on the outer surface of the housing is covered with at least one covering member. The at least one covering member is impermeable and straddles a portion adjacent to the joint portion on the outer surface of the first housing member and a portion adjacent to the joint portion on the outer surface of the second housing member. Are attached.

  In the compressor, a joint portion between the first housing member and the second housing member on the outer surface of the housing is covered with the at least one covering member. Here, since the at least one covering member is affixed to the outer surface of the housing, its installation is relatively easy. Further, since the joint portion is covered with the at least one covering member, for example, the number of fastening members for fastening the first housing member and the second housing member can be reduced compared to the conventional case. The management of the tightening torque of each fastening member can be relaxed. For this reason, according to the compressor, while suppressing an increase in the manufacturing cost, intrusion of salt water or the like between the first housing member and the second housing and the joining of the first housing member thereby Corrosion of the surface and the joint surface of the second housing member can be prevented.

It is a schematic sectional drawing of the compressor which concerns on one Embodiment of this invention. It is an expanded sectional view showing the composition of a covering member. It is the figure which showed the external appearance of the housing of the said compressor typically, (A) is a side view, (B) is the figure seen from the front, (C) is the figure seen from the back, (D) is an X view principal part figure of (A). It is a figure for demonstrating the position corresponding to a volt | bolt (fastening member). It is a principal part block diagram which shows the modification of the said compressor. It is a principal part block diagram which shows the other modification of the said compressor. It is a figure which shows the other modification of the said compressor, (A) is a figure corresponding to FIG.3 (B), (B) is a figure corresponding to FIG.3 (C).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view of a compressor according to an embodiment of the present invention. The compressor 1 according to the embodiment is incorporated in, for example, a refrigerant circuit of a vehicle air conditioner, compresses refrigerant sucked from the refrigerant circuit (low pressure side), and discharges the refrigerant to the refrigerant circuit (high pressure side). The compressor 1 includes a housing 10 having a substantially cylindrical appearance, and a compression mechanism 20 accommodated in the housing 10.

  The housing 10 includes a front housing 11, a center housing 12 and a rear housing 13. The front housing 11 and the center housing 12 are arranged at intervals in the circumferential direction in a state in which the rear end surface 11a of the front housing 11 and the front end surface 12a of the center housing 12 are joined via an interposed material (not shown). The plurality of bolts (fastening members) 31 are fastened. The center housing 12 and the rear housing 13 are arranged at intervals in the circumferential direction in a state in which the rear end surface 12b of the center housing 12 and the front end surface 13a of the rear housing 13 are joined via an interposed material (not shown). The plurality of bolts (fastening members) 32 are fastened. In addition, although the said intervention material is not restrict | limited in particular, For example, an O-ring and a gasket (a liquid gasket is included) correspond.

  In the housing 10, a suction chamber C1 and a discharge chamber C2 are provided. The suction chamber C <b> 1 is formed by the front housing 11 and the center housing 12. The suction chamber C <b> 1 communicates with the refrigerant circuit (low pressure side) through a suction port (not shown) formed in the front housing 11. The discharge chamber C <b> 2 is formed by the center housing 12 and the rear housing 13. The discharge chamber C <b> 2 communicates with the refrigerant circuit (on the high pressure side) through a discharge port (not shown) formed in the rear housing 13.

  The compression mechanism 20 compresses the refrigerant guided from the refrigerant circuit (low pressure side thereof) to the suction chamber C1 through the suction port. The compression mechanism 20 is a scroll type compression mechanism, and includes a fixed scroll 21 and a movable scroll 22. The fixed scroll 21 includes a base plate portion 211 and a spiral wrap 212 formed (standing) on one surface of the base plate portion 211. Similarly, the movable scroll 22 includes a base plate portion 221 and a spiral wrap 222 formed (standing) on one surface of the base plate portion 221. The fixed scroll 21 and the movable scroll 22 are arranged so that their spiral wraps 212 and 222 mesh with each other. And the compression chamber C3 as a sealed space is formed between both the spiral wraps 212 and 222 when the side walls of the spiral wraps 212 and 222 partially contact each other.

  In the present embodiment, the fixed scroll 21 is configured integrally with the center housing 12. That is, the center housing 12 is formed in a bottomed cylindrical shape with the front end as an open end and the rear end as a closed end, and the rear end wall (bottom wall) of the center housing 12 forms the base plate portion 211 of the fixed scroll 21. doing. In addition, a through hole 213 is formed substantially at the center of the base plate portion 211 of the fixed scroll 21. The through hole 213 functions as a discharge hole for discharging the refrigerant compressed by the compression mechanism 20 to the discharge chamber C <b> 2, and is opened and closed by a reed valve (discharge valve) 214.

  The movable scroll 22 is connected to the drive shaft 42 via the crank mechanism 41. The crank mechanism 41 is configured to convert the rotational movement of the drive shaft 42 into the turning movement of the movable scroll 22. Since the crank mechanism having such a function is known, detailed description thereof is omitted, but the crank mechanism 41 has the same configuration as that of the driven crank mechanism described in, for example, Japanese Patent Laid-Open No. 2013-160187. It can be. Note that the rotation of the movable scroll 22 is blocked by a rotation blocking mechanism 43.

  An end portion 42 a of the drive shaft 42 opposite to the crank mechanism 41 (movable scroll 22) side protrudes from the front housing 11, and an end portion 42 a of the protruding drive shaft 42 is interposed via an electromagnetic clutch 51. The pulley 52 is connected. The pulley 52 is rotatably provided and is connected to an output pulley (not shown) on the drive source (the vehicle engine or motor) side via a belt (not shown).

  In the compressor 1, when the rotation of the pulley 52 accompanying the rotation of the output pulley is transmitted to the drive shaft 42 via the electromagnetic clutch 51, the drive shaft 42 rotates. The rotation of the drive shaft 42 is converted into a turning motion of the movable scroll 22 by the crank mechanism 41, whereby the movable scroll 22 makes a turning motion with respect to the fixed scroll 21. When the movable scroll 22 performs the orbiting motion, a compression chamber C3 is formed in the vicinity of the outer ends of the spiral wraps 212 and 222 by the spiral wraps 212 and 222. At this time, the refrigerant circuit (from the low pressure side) The refrigerant guided to the suction chamber C1 through the suction port is taken into the compression chamber C3. Then, the compression chamber C3 that has taken in the refrigerant moves toward the inner ends of the spiral wraps 212 and 222, that is, the central portions of the base plate portions 211 and 221 while reducing the volume thereof. Thereby, the refrigerant in the compression chamber C3 is compressed. Then, the refrigerant compressed in the compression chamber C3 is discharged to the discharge chamber C2 through the through hole (discharge hole) 213 and the reed valve 214, and then the refrigerant circuit (on the high pressure side) through the discharge port. Discharged.

  Further, in the compressor 1, a joint portion (hereinafter referred to as “first joint portion”) 10 a between the front housing 11 and the center housing 12 on the outer surface of the housing 10 is covered with a covering member 61. A joint portion (hereinafter referred to as “second joint portion”) 10 b between the housing 12 and the rear housing 13 is covered with a covering member 62.

  FIG. 2 is an enlarged cross-sectional view showing the configuration of the covering members 61 and 62. 3 is a view schematically showing the appearance of the housing 10 (front housing 11, center housing 12, and rear housing 13), FIG. 3 (A) is a side view, and FIG. 3 (B) is seen from the front. FIG. 3 (C) is a view seen from the rear, and FIG. 3 (D) is an X view main part view of FIG. 3 (A).

  In the present embodiment, the covering members 61 and 62 are formed as flexible band-shaped members. As shown in FIG. 2, the adhesive layer or the pressure-sensitive adhesive layer 63 and water (mainly salt water). Has a water-impermeable surface material layer 64 that does not penetrate or is difficult to penetrate. Preferably, the surface material layer 64 has heat resistance in addition to the water impermeability. Although not particularly limited, for example, an aluminum tape or a polyester tape can be used as the covering members 61 and 62. Here, although the adhesive layer or the pressure-sensitive adhesive layer 63 is provided on the lower surface of the surface material layer 64, an intermediate layer may be provided between the adhesive layer or the pressure-sensitive adhesive layer 63 and the surface material layer 64. Good.

  Further, as shown in FIGS. 1 and 3A, the covering member 61 is formed on the portion adjacent to the first joint portion 10 a on the outer surface of the front housing 11 and the first joint portion 10 a on the outer surface of the center housing 12. Affixed across adjacent sites. Similarly, the covering member 62 is affixed across a portion of the outer surface of the center housing 12 adjacent to the second joint portion 10b and a portion of the outer surface of the rear housing 13 adjacent to the second joint portion 10b. In the present embodiment, on the outer surface of the housing 10, a pasting region for pasting the covering member 61 (that is, a predetermined region sandwiching the first joint 10a) and a pasting region for pasting the covering member 62 (that is, the second region). The predetermined region sandwiching the joint portion 10b is formed as a cylindrical surface having no irregularities (strictly, it is not necessary to be a cylindrical surface and may be a generally cylindrical surface).

  Specifically, as shown in FIG. 3B, the covering member 61 has one end 61a, 61b of one of a plurality of bolts 31 for fastening the front housing 11 and the center housing 12 together. It is affixed on the outer surface of the housing 10 so as to be disposed at a position corresponding to the bolt 31. In other words, the covering member 61 is wound around the outer surface of the housing 10, and its sticking start position and sticking end position are positions corresponding to one bolt 31. Similarly, as shown in FIG. 3C, the covering member 62 has one end 32 a, 62 b of which is one bolt 32 of the plurality of bolts 32 for fastening the center housing 12 and the rear housing 13. It is affixed on the outer surface of the housing 10 so that it may be arrange | positioned in the position corresponding to. In other words, the covering member 62 is wound around the outer surface of the housing 10, and the sticking start position and the sticking end position are positions corresponding to one bolt 32. The one bolt 31 and the one bolt 32 are not particularly limited, but are preferably bolts located below the middle position in the vertical direction in the installed state of the compressor 1, and more preferably, FIG. As shown in (B) and (C), the bolt is located on the lowermost side.

In the present embodiment, as shown in FIG. 3 (D), the attaching area for landmarks 101, be affixed on the outer surface of the housing 10, to be covered member 61 showing the joining start position of the cover member 61 Or it is provided in the vicinity. Similarly, a mark 102 indicating the position where the covering member 62 is pasted is provided on the outer surface of the housing 10 at or near the pasting region for pasting the covering member 62.

  In the present embodiment, the triangular convex portions (or concave portions) are the marks 101 and 102, but the shapes and the like of the marks 101 and 102 can be arbitrarily set. Moreover, in this embodiment, although the covering members 61 and 62 are affixed so that the both ends may have a clearance gap, you may affix so that the both ends may overlap. Furthermore, in this embodiment, the position corresponding to the bolt 31 (or bolt 32) is an imaginary line extending at an angle of 45 ° from the outer edge of the seating surface of the bolt 31 (or bolt 32), as shown in FIG. This is a range R1 inside L1, and is preferably a range R2 inside a virtual line L2 extending perpendicularly from the outer edge of the seating surface of the bolts 31, 32.

  In the housing 10 of the compressor 1 according to this embodiment, the front housing 11 and the center housing 12 are joined to each other on the joint surfaces (that is, the rear end surface 11a of the front housing 11 and the front end surface 12a of the center housing 12). The center housing 12 and the rear housing 13 are joined to each other at the joint surfaces (that is, the rear end surface 12b of the center housing 12 and the front end surface 13a of the rear housing 13). The first joint 10a between the front housing 11 and the center housing 12 on the outer surface of the housing 10 is covered with a covering member 61, and the second joint 10b between the center housing 12 and the rear housing 13 on the outer surface of the housing 10 is covered. Covered by a member 62. Specifically, the covering members 61 and 62 include an adhesive layer or pressure-sensitive adhesive layer 63 and a water-impermeable surface material layer 64, and the covering member 61 is a first joint portion on the outer surface of the front housing 11. It affixes across the site | part adjacent to 10a, and the site | part adjacent to the 1st junction part 10a in the outer surface of the center housing 12. FIG. The covering member 62 is affixed across a portion of the outer surface of the center housing 12 adjacent to the second joint portion 10b and a portion of the outer surface of the rear housing 13 adjacent to the second joint portion 10b. For this reason, salt water or the like is prevented from entering between the front housing 11 and the center housing 12 and between the center housing 12 and the rear housing 13, and corrosion of the joint surfaces of the housings 11 to 13 is prevented. Is done.

  Here, the covering members 61 and 62 are simply attached to the outer surface of the housing 10, and the installation thereof is relatively easy. In addition, since all or most of the first joint portion 10a and the second joint portion 10b on the outer surface of the housing 10 are covered by the covering members 61 and 62, the number of bolts can be reduced as compared with the conventional case. It is possible to loosen the management of the tightening torque. For this reason, the corrosion by the salt water etc. of the joint surface of each housing 11-13 can be prevented effectively, suppressing the increase in the manufacturing cost of the compressor 1. FIG.

  Further, both end portions 61 a and 61 b of the covering member 61 are disposed at positions corresponding to one bolt 31, and both end portions 62 a and 62 b of the covering member 62 are disposed at positions corresponding to one bolt 32. Positions corresponding to the bolts 31 and 32 have high surface pressure due to the axial force of the bolts 31 and 32, and salt water or the like hardly enters from the first joint 10a and the second joint 10b in the first place. Therefore, even if there is a gap at both ends of the covering members 61 and 62 or both ends of the covering members 61 and 62 overlap, salt water or the like hardly enters from there. For this reason, the covering members 61 and 62 can be easily and effectively installed (applied to the outer surface of the housing 10). In particular, by setting the one bolt 31 and the one bolt 32 to a bolt located below the middle position in the vertical direction in the installed state of the compressor 1, preferably the lowest located bolt. Intrusion of salt water or the like is further effectively prevented.

  Next, some modifications of the above-described embodiment will be described. The following modifications can be combined as appropriate.

(Modification 1)
A chamfering process may be performed on the first joint 10 a and the second joint 10 b on the outer surface of the housing 10. Specifically, as shown in FIG. 5A, the corner between the outer surface and the rear end surface 11 a in the front housing 11, the corner between the outer surface and the front end surface 12 a in the center housing 12, and the center housing 12 The corner portion between the outer surface and the rear end surface 12b and the corner portion between the outer surface and the front end surface 13a in the rear housing 13 may be chamfered. This is convenient because the covering members 61 and 62 can be attached more stably. Here, the size of the chamfer is not particularly limited. For example, as shown in FIG. 5B, when the front housing 11 and the center housing 12 are fastened in the most shifted state, Even when the rear housing 13 is fastened in the most shifted state, the inner end edge portion CHa of one chamfered surface (surface formed by the chamfering) CH is positioned outside the other outer surface. It is set so that there is no. Further, as shown in FIG. 5C, the covering member 61 is further attached to the chamfered surface CH of the front housing 11 and the chamfered surface CH of the center housing 12, and the covering member 62 is further chamfered to the center housing 12. It may also be affixed to the surface CH and the chamfered surface CH of the rear housing 13.

(Modification 2)
On the outer surface of the housing 10, a pasting region for pasting the covering member 61 and a pasting region for pasting the covering member 62 may be formed so as to be distinguishable from other regions. For example, as shown in FIG. 6A, the pasting region 103 for pasting the covering member 61 includes a groove 111 formed on the outer surface of the front housing 11 and a groove 121 formed on the outer surface of the center housing 12. And a pasting region 104 to which the covering member 62 is pasted is partitioned by a groove 122 formed on the outer surface of the center housing 12 and a groove 131 formed on the outer surface of the rear housing 13. Alternatively, as shown in FIGS. 6B and 6C, the pasting region 103 to which the covering member 61 is pasted and the pasting region 104 to which the covering member 62 is pasting protrude or dent more than the adjacent region. Formed with. This is convenient because the covering member 61 and the covering member 62 can be easily attached to appropriate positions. In particular, when the regions 103 and 104 are formed to be recessed, it is possible to effectively prevent the covering members 61 and 62 from being peeled off or damaged due to contact with other devices.

(Modification 3)
The first joint portion 10a and the second joint portion 10b may be covered with a plurality of covering members. For example, as shown in FIGS. 7 (A) and 7 (B) corresponding to FIGS. 3 (B) and 3 (C), there are a plurality of portions excluding positions corresponding to the respective bolts 31 in the first joint portion 10a. A portion of the second joint portion 10b excluding a position corresponding to each bolt 32 may be configured to be covered with a plurality of covering members 66. If it does in this way, since the usage-amount of a coating | coated member can be reduced compared with the case where one coating | coated member is used, cost reduction can be aimed at. Particularly in the present embodiment, since the intervals between the bolts 31 are equal, the plurality of covering members 65 can be used as a common component, and since the intervals between the bolts 32 are equal, the plurality of covering members 66 can be used as a common component. .

  In Modification 3, the distance between the bolts 31 is equal, and the distance between the bolts 32 is equal. However, it is not limited to this. The interval between the predetermined adjacent bolts 31 only needs to be equal to at least one of the intervals between the other adjacent bolts 31, and similarly, the interval between the predetermined adjacent bolts 32 is the same between the other adjacent bolts 32. It only needs to be equal to at least one of the intervals.

  As mentioned above, although embodiment of this invention and its modification were demonstrated, this invention is not limited to the above-mentioned embodiment and modification, Further deformation | transformation and change are possible based on the technical idea of this invention. It is.

DESCRIPTION OF SYMBOLS 1 ... Compressor 10 ... Housing 10a ... 1st junction part 10b ... 2nd junction part 11 ... Front housing (housing member)
12 ... Center housing (housing member)
13 ... Rear housing (housing member)
20 ... Compression mechanism 31, 32 ... Bolt (fastening member)
61, 62, 65, 66 ... Cover member 63 ... Adhesive layer or adhesive layer 64 ... Surface material layer

Claims (11)

A compressor including a housing and a compression mechanism housed in the housing,
The housing includes a first housing member and a second housing member that are joined to each other, and at least one covering member is a joint between the first housing member and the second housing member on an outer surface of the housing. Is covered by
The at least one covering member is impermeable and straddles a portion adjacent to the joint portion on the outer surface of the first housing member and a portion adjacent to the joint portion on the outer surface of the second housing member. Affixed,
Compressor. The corners of the outer surface and the joint surface of the first housing member and the corners of the outer surface and the joint surface of the second housing member are chamfered.
The compressor according to claim 1. The at least one covering member is further attached to a chamfered surface of the first housing member and a chamfered surface of the second housing member formed by the chamfering,
The compressor according to claim 2.   The compressor according to any one of claims 1 to 3, wherein a pasting region for pasting the at least one covering member on the outer surface of the housing is formed so as to be distinguishable from other regions on the outer surface of the housing. .   The said sticking area | region is divided by the 1st groove part formed in the said outer surface of the said 1st housing member, and the 2nd groove part formed in the said outer surface of the said 2nd housing member. Compressor.   The compressor according to claim 4, wherein the sticking region protrudes or is recessed from a region adjacent thereto.   The compressor according to any one of claims 4 to 6, wherein a mark indicating a sticking start position of the at least one covering member is provided in the sticking area or in the vicinity thereof. The at least one covering member is formed in a band shape, and an attaching region for attaching the at least one covering member on the outer surface of the housing is formed as a cylindrical surface.
The compressor according to any one of claims 1 to 7. The first housing member and the second housing member are fastened by a plurality of fastening members, and all or most of the joint portion is covered by a single covering member, and each of both end portions of the single covering member is covered. , Arranged at a position corresponding to one fastening member of the plurality of fastening members,
The compressor according to claim 8.   The first housing member and the second housing member are fastened by a plurality of fastening members, and a portion of the joint portion excluding a portion corresponding to each fastening member is covered with a plurality of covering members. The compressor described in 1.   The compressor according to claim 10, wherein the plurality of fastening members are arranged such that an interval between predetermined adjacent fastening members is equal to at least one of intervals between other adjacent fastening members.