JP2009041399A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the weight, cost, and size of a housing. <P>SOLUTION: This electric compressor 1 comprises a compressor housing member 3 for storing a compression mechanism part 10 and a front housing member 4 for closing the front side of the compressor housing member 3. A refrigerant suction passage 18a is so formed in the compressor that a refrigerant passes through the inner surface of the front housing member 4. The front housing member 4 has a base wall part 4a and a rear peripheral wall part 4b projecting from the peripheral edge of the base wall part to the rear side. The length of the compressor housing member 3 is so set that the compressor housing member can cover most of the compression mechanism part 10. The length of the front housing member 4 is so set that the front housing member can cover a part of the compression mechanism part 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a compressor that compresses a refrigerant.

  A conventional compressor of this type is disclosed in Patent Document 1. As shown in FIG. 3, the compressor 100 includes a housing 101. The housing 101 includes a compressor housing member 102 that houses the compression mechanism 110, a front housing member 103 that is disposed on one end side of the compressor housing member 102, and the other end side of the compressor housing member 102. And a rear housing member 104 accommodated therein.

  The front housing member 103 includes a base wall portion 103a disposed along the side surface of the compressor housing member 102, and a component mounting wall portion 103b disposed on the base wall portion 103a, which is separate from the base wall portion 103a. ing.

  The compressor housing member 102 is provided with a suction port 105 and a refrigerant suction passage 106 for supplying a refrigerant to the compression mechanism 110. A branch passage 107 is provided in the refrigerant suction passage 106 so that the sucked refrigerant passes through the inner surface of the front housing member 103. The motor controller 121 is cooled by the refrigerant passing through the branch passage 107.

  By the way, the suction port 105 can be set only at a position where a predetermined wall thickness can be secured on the peripheral wall portion 105 a, and therefore, the suction port 105 is set at a position separated from the end surface of the compressor housing member 102 by the thickness of the peripheral wall portion 105 a. On the other hand, the branch passage 107 of the refrigerant suction passage 106 is formed so as to pass through the inner surface side of the front housing member 103. As a result, the installation space width W1 of the suction port 105, the refrigerant suction passage 106, and the branch passage 107 is widened. Therefore, the length dimension of the compressor housing member 102 becomes long, and the housing 101 is increased in weight, cost, and size.

  In order to solve this, a compressor shown in FIG. 4 can be considered. As shown in FIG. 4, the front housing member 103 of the compressor 130 includes a base wall portion 103a and a front peripheral wall portion 103c that projects forward from the periphery of the base wall portion 103a.

  A refrigerant suction passage 106 is provided between the front housing member 103 and the compressor housing member 102. The refrigerant suction passage 106 includes an annular first passage 106a and a second passage 106b disposed near the center.

  The suction port 105 is provided in the front housing member 103. When the suction port 105 is provided in the front housing member 103 in this manner, the suction port 105 can be opened to the second passage 106 b of the refrigerant suction passage 106, that is, the region that effectively contributes to cooling of the motor control unit 121. The installation space width W2 of 105 and the refrigerant suction passage 106 can be reduced.

  The same components as those in the former conventional example are denoted by the same reference numerals, and the description thereof is omitted.

  According to the compressor 130, since it is not necessary to secure a space for providing the suction port 105 in the compressor housing member 102, the length dimension of the compressor housing member 102 can be shortened.

A configuration in which the suction port 105 is provided in the front housing member is disclosed in Patent Document 2.
JP 2005-54716 A JP 2006-144623 A

  However, in the latter conventional compressor 130, as shown in FIG. 5, when the refrigerant pressure P in the refrigerant suction passage 106 acts on the base wall 103a of the front housing member 103, the base wall 103a P tries to bend and deform in a direction in which the center protrudes forward. In order to prevent such bending deformation, in the latter conventional example, the dimension L4 of the front peripheral wall portion 103c of the front housing member 103 is set long, and the rigidity of the front housing member 103 is increased. Therefore, in the latter conventional compressor 130, the length of the compressor housing member 102 can be slightly shortened, but the width of the front housing member 103 is increased. From the above, when viewed as the housing 101 as a whole, there are problems such as increased weight, increased cost, and increased size.

  Even in the former compressor 100 of the conventional example, in order to prevent the deformation due to the pressure of the base wall portion 103a of the front housing member 103, a long front peripheral wall portion is added or the front housing member 103 is provided. Since the component mounting wall 103b needs to be thick, the housing 101 becomes heavier, more expensive, and larger than the latter compressor 130.

  Accordingly, an object of the present invention is to provide a compressor capable of reducing the weight, cost and size of a housing.

  The invention according to claim 1, which achieves the above object, comprises: a compressor housing member that is open on the front side and that houses the compression mechanism; and a front housing member that closes the opening on the front side of the compressor housing member. A compressor in which a refrigerant passage is formed to pass a refrigerant through an inner surface of a member, wherein the front housing member includes a base wall portion disposed along an opening on a front side of the compressor housing member, and a base wall portion A rear peripheral wall portion projecting rearward from the peripheral edge, the length of the rear peripheral wall portion of the front housing member is set to a length that covers a part of the compression mechanism portion, and the compressor housing member and the The compressor housing member is positioned so that the compression housing portion is in contact with the front housing member. Covering the most part, wherein said rear peripheral wall portion of the front housing member is a position to cover a portion of the compression mechanism.

  A second aspect of the present invention is the compressor according to the first aspect, wherein the refrigerant passage is a refrigerant suction passage formed between the compression mechanism portion and the front housing member and opens to the refrigerant suction passage. A suction port is provided in the front housing member.

  A third aspect of the present invention is the compressor according to the second aspect, wherein the suction port is set so as to open entirely within a width dimension of the refrigerant suction passage.

  According to the first aspect of the present invention, the base wall portion of the front housing member receives the pressure of the refrigerant and tends to bend and deform in a direction in which the center protrudes forward. The long rear peripheral wall portion of the material fulfills a powerful function of preventing deformation. Therefore, the front housing member can shorten the length of the front peripheral wall portion or can eliminate the front peripheral wall portion itself. Further, the length dimension of the compressor housing can be shortened by the length of the rear peripheral wall portion of the front housing member. From the above, the weight, cost, etc. of the front housing member itself are almost the same as the conventional one, but the length of the compressor housing member can be surely shortened, so that the housing can be reduced in weight, cost, size, etc. Can do. Further, since the strength of the front housing member is increased by the rear peripheral wall portion, the thickness of the base wall portion can be reduced to the limit of rigidity, and the cooling performance of the motor control portion is improved. Further, in the case of an electric compressor, a resin auxiliary housing member may be provided on the outer surface side of the front housing member, and the motor control mounting chamber may be configured by the front housing member and the resin auxiliary housing member. In such a configuration, the front peripheral wall portion of the front housing member is short or can be eliminated, and the portion can be configured by the resin auxiliary housing member. When it sees, it will become weight reduction, cost reduction, etc.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the rear peripheral wall portion is long, the degree of freedom of the installation position of the suction port is high. In other words, since the suction port needs to secure a predetermined strength, it can be set only at a position where the peripheral wall portion of the suction port has a predetermined thickness, but the condition is satisfied because the length of the rear peripheral wall portion is long. The position to be installed is wide, and the installation position is highly flexible.

  According to the invention of claim 3, in addition to the effect of the invention of claim 2, there is no step that prevents the flow of the refrigerant at the boundary position where the refrigerant enters the refrigerant suction passage from the suction port. An inhalation route can be formed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional view of an electric compressor, and FIG. 2 is a sectional view of a front housing member.

  As shown in FIG. 1, an electric compressor 1 that is a compressor has a housing 2. The housing 2 includes a compressor housing member 3, a front housing member 4 disposed on the side surface on the opening side of the compressor housing member 3, and a rear housing member (not shown) disposed on the other side surface of the compressor housing member 3. ). The compressor housing member 3, the front housing member 4, and the rear housing member (not shown) are made of aluminum alloy, and the detailed configuration of these housing members will be described in detail below.

  The compression mechanism unit 10 is accommodated in the compressor housing member 3. The compression mechanism unit 10 includes a cylinder block 11 having a substantially elliptical inner peripheral surface, and a front side block 12 and a rear side block 13 disposed on both side surfaces of the cylinder block 11. A cylinder chamber 14 is formed in these blocks 11, 12 and 13.

  A rotor 15 is accommodated in the cylinder chamber 14. A rotation shaft 16 passes through the center of the rotor 15, and the rotor 15 and the rotation shaft 16 are fixed. The rotary shaft 16 is rotatably supported by the front side block 12 and the rear side block 13. The rear side of the rotating shaft 16 protrudes outside from the rear side block 13.

  A vane 17 is provided at an equally spaced position on the outer periphery of the rotor 15 so as to protrude and retract. Each vane 17 moves while contacting the inner wall of the cylinder chamber 14 by back pressure and its own centrifugal force when the rotor 15 rotates. A plurality of compression chambers are formed in the cylinder chamber 14 between the adjacent vanes 17. Each compression chamber expands its volume in accordance with the rotation of the rotor 15 and repeats a suction process for sucking in the refrigerant, a compression process for reducing the volume, compressing the sucked refrigerant, and discharging it. In the compression chamber suction process, the refrigerant is sucked into the compression chamber of the cylinder chamber 14 through the refrigerant suction path 18, and in the second half of the compression stroke, the refrigerant compressed in the compression chamber of the cylinder chamber 14 is discharged into the refrigerant discharge path ( (Not shown). The configurations of the refrigerant suction path 18 and the refrigerant discharge path (not shown) will be described below.

  A motor (not shown) is provided inside a rear housing member (not shown). A motor (not shown) includes a rotor (not shown) fixed to a motor rotating shaft (not shown) and a stator (not shown) fixed to an inner peripheral surface of a rear housing member (not shown). And. One end side of a motor rotation shaft (not shown) is connected to the rotation shaft 16 of the compression mechanism unit 10. The compression mechanism unit 10 is driven by driving the motor. The motor (not shown) is driven and controlled by the motor control unit 22.

  On the other hand, the compressor housing member 3 includes a cylindrical peripheral wall portion 3a and a boss portion 3b projecting from the inner periphery of the peripheral wall portion 3a. Although the length dimension L1 of the surrounding wall part 3a is set to the length which covers most of the compression mechanism part 10, although not the whole. That is, it is set shorter than the compressor housing member 102 of the latter conventional example shown in FIG.

  As shown in detail in FIG. 2, the front housing member 4 includes a base wall portion 4a, a rear peripheral wall portion 4b projecting rearward from the peripheral edge of the base wall portion 4a, and a peripheral edge of the base wall portion 4a. It is comprised from the front surrounding wall part 4c projected toward the front side. A length dimension L2 of the rear peripheral wall portion 4b is set to a length that covers a part of the compression mechanism portion 10. In other words, the compressor housing member 3 is set to be long so as to cover a portion where the compression mechanism portion 10 is not covered. On the other hand, the length dimension L3 of the front peripheral wall 4c is set to a very small dimension.

  Due to the dimensional relationship between the compressor housing member 3 and the front housing member 4, the compressor housing member 3 is positioned at the compression mechanism portion 10 at the abutting position between the peripheral wall portion 3 a of the compressor housing member 3 and the rear peripheral wall portion 4 b of the front housing member 4. The rear peripheral wall portion 4 b of the front housing member 4 is in a position to cover a part of the compression mechanism portion 10.

  An O-ring 30 is interposed on the abutting surface between the peripheral wall portion 3 a of the compressor housing member 3 and the rear peripheral wall portion 4 b of the front housing member 4. An O-ring 31 is interposed on the contact surface between the rear peripheral wall portion 4 b of the front housing member 4 and the front side block 12.

  A resin auxiliary housing member 20 is provided outside the front housing member 4. The front housing member 4 and the resin auxiliary housing member 20 constitute a motor control mounting chamber 21. The resin auxiliary housing member 20 includes a frame body 20a that is abutted on the end surface of the front peripheral wall portion 4c of the front housing member 4, a substrate support portion 20b that is disposed in the frame body 20a, and the like. The length L4 of the frame body 20a is set to a height that complements the height of the front peripheral wall portion 4c of the front housing member 4 so that the height of the motor control mounting chamber 21 becomes a predetermined height. A motor control unit 22 is mounted in the motor control mounting chamber 21. The heating element 23 of the motor control unit 22 is fixed in close contact with the base wall 4 a of the front housing member 4.

  The refrigerant suction path 18 is formed between, for example, a suction port (not shown) formed in the front side block 12 and the rear side block 13 of the compression mechanism unit 10, and between the front side block 12 and the front housing member 4. A refrigerant suction passage 18a that is a refrigerant passage communicating with the refrigerant suction passage 18a (not shown) and a suction port 18b that opens to the refrigerant suction passage 18a are configured.

  The suction port 18 b is provided in the front housing member 4. The suction port 18b is set so as to open entirely within the range of the width dimension d1 of the refrigerant suction passage 18a. That is, the suction port 18b is provided at a boundary position with the refrigerant suction passage 18a so as not to have a step that prevents the flow of the refrigerant.

  The refrigerant discharge passage (not shown) is a refrigerant provided in, for example, a discharge port (not shown) formed in the rear side block 13 of the compression mechanism unit 10, the compressor housing member 3, and the rear housing member (not shown). A discharge passage (not shown) and a discharge port (not shown) provided in a rear housing member (not shown) and open to the refrigerant discharge passage (not shown) are configured.

  In the above configuration, when a motor (not shown) rotates, the rotation shaft 16 of the compression mechanism unit 10 rotates, and thereby the compression mechanism unit 10 is driven. Then, the refrigerant is sucked into the cylinder chamber 14 of the compression mechanism section 10 through the refrigerant suction path 18, and the refrigerant compressed in the cylinder chamber 14 of the compression mechanism section 10 is discharged through the refrigerant discharge path (not shown). The

  During operation of the electric compressor 1, the base wall portion 4a of the front housing member 4 is bent in a direction in which the center protrudes forward in response to the pressure P of the sucked refrigerant as shown in FIG. Try to transform. However, since the long rear peripheral wall portion 4b performs a strong bending deformation preventing function against such bending deformation, bending deformation is prevented. Thus, since the back peripheral wall part 4b fulfill | performs the bending deformation prevention function, the length of the front peripheral wall part 4c can be shortened like this Embodiment, or the front peripheral wall part 4c itself can be eliminated. Further, the length L1 of the compressor housing member 3 can be reliably shortened by the length L2 of the rear peripheral wall portion 4b of the front housing member 4. As described above, the weight, cost, and the like of the front housing member 4 itself are substantially the same as those of the conventional housing, but when viewed as the entire housing 2, the weight, cost, size, etc. are reduced.

  Further, since the strength of the front housing member 4 is increased by the rear peripheral wall portion 4b, the thickness of the base wall portion 4a can be reduced to the limit of rigidity, and the cooling performance of the motor control portion 22 can be improved. Can do.

  Further, as in the electric compressor 1 of the present embodiment, a resin auxiliary housing member 20 is attached to the outer surface side of the front housing member 4, and the motor control mounting chamber 21 is defined by the front housing member 4 and the resin auxiliary housing member 20. In the case of the configuration, the front peripheral wall portion 4c of the front housing member 4 can be shortened or eliminated, and the corresponding portion can be configured by the resin auxiliary housing member 20. Therefore, the front housing member 4 and the resin auxiliary housing member 20 can be configured. As a whole, weight reduction and cost reduction are achieved.

  In this embodiment, the suction port 18 b is provided in the front housing member 4. Since the rear peripheral wall 4b of the front housing member 4 is long, the degree of freedom of the installation position of the suction port 18b is increased. That is, since the suction port 18b needs to ensure a predetermined strength, it can be set only at a position where the peripheral wall portion of the suction port 18b has a predetermined thickness, but the length L2 of the rear peripheral wall portion 4b is long. In addition, the position satisfying the condition becomes a wide range, and the degree of freedom of the set position is increased.

  In this embodiment, the suction port 18b is set so as to open entirely within the range of the width dimension d1 of the refrigerant suction passage 18a. Accordingly, since there is no step that prevents the flow of the refrigerant at the boundary position where the refrigerant enters the refrigerant intake passage from the intake port 18b, it is possible to form the refrigerant intake passage 18 having a low refrigerant flow resistance. In the latter conventional example shown in FIG. 4, since there is no degree of freedom in the installation position of the suction port 105, a step b is formed at the boundary position between the suction port 105 and the refrigerant suction passage 106 so as to prevent the refrigerant flow. The distribution resistance will be large.

  In this embodiment, the compressor is the electric compressor 1, but it goes without saying that the present invention can also be applied to a compressor that rotates by receiving the rotational force of the engine.

1 is a cross-sectional view of an electric compressor according to an embodiment of the present invention. 1 is a cross-sectional view of a front housing member according to an embodiment of the present invention. It is sectional drawing of the compressor of a prior art example. It is principal part sectional drawing of the compressor of another prior art example. It is sectional drawing of the front housing member of another prior art example.

Explanation of symbols

1 Electric compressor (compressor)
3 Compressor housing member 4 Front housing member 4a Base wall portion 4b Rear peripheral wall portion 10 Compression mechanism portion 18a Refrigerant suction passage (refrigerant passage)
18b Suction port

Claims (3)

The front housing includes a compressor housing member (3) that is open on the front side and accommodates the compression mechanism (10), and a front housing member (4) that closes the front opening on the compressor housing member (3). A compressor (1) in which a refrigerant passage (18a) is formed to pass a refrigerant through an inner surface of a member (4),
The front housing member (4) protrudes rearward from the base wall (4a) disposed along the front opening of the compressor housing member (3) and the periphery of the base wall (4a). Having a rear peripheral wall (4b),
The length dimension of the rear peripheral wall portion (4b) of the front housing member (4) is set to a length that covers a part of the compression mechanism portion (10), and the compressor housing member (3) and the front housing member In the butting position with (4), the compressor housing member (3) covers most of the compression mechanism portion (10), and the rear peripheral wall portion (4b) of the front housing member (4) is the compression mechanism. A compressor (1) characterized in that the compressor (1) is positioned to cover a part of the section (10). Compressor (1) according to claim 1,
The refrigerant passage (18a) is a refrigerant suction passage (18a) formed between the compression mechanism (10) and the front housing member (4), and is an intake port that opens to the refrigerant suction passage (18a). The compressor (1), wherein (18b) is provided on the front housing member (4). Compressor (1) according to claim 2,
The compressor (1), wherein the suction port (18b) is set so as to open entirely within a width dimension of the refrigerant suction passage (18a).

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