Electric compressor

Abstract

The present invention relates to an electric compressor including a motor, a compression mechanism receiving power from the motor to compress a refrigerant, an inverter controlling the motor, a housing having an opening into which the inverter is inserted and an outer wall forming the opening, and a cover fastened to the outer wall and covering the opening, the cover including a damping layer having a first face opposite to the housing and a second face constituting a back face of the first face, a first panel layer bonded to the first face, and a second panel layer bonded to the second face, at least a portion of a peripheral edge of the cover including a bent portion bent from the cover including the damping layer, thereby being capable of inhibiting foreign matter from entering the opening, and being capable of inhibiting corrosion of the cover, and inhibiting the first panel layer and the second panel layer from being peeled off from the damping layer.

Description

Technical Field

[0001] This invention relates to an electric compressor, and more specifically, to an electric compressor capable of compressing refrigerant by means of the driving force of a motor controlled by an inverter. Background Technology

[0002] Typically, compressors, as devices that compress refrigerant gases and other fluids, are used in air conditioning systems in buildings, vehicles, and other applications.

[0003] The compressors mentioned above are classified according to their compression method into reciprocating compressors that compress refrigerant through the reciprocating motion of pistons and rotary compressors that compress refrigerant through rotational motion. The reciprocating compressors are classified according to their power transmission method into crankshaft compressors that transmit power through a crankshaft to multiple pistons and swashplate compressors that transmit power through a drive shaft equipped with swashplates. The rotary compressors mentioned above can be classified into vane rotary compressors that use a rotating shaft and blades, and scroll compressors that use a swirling scroll and a fixed scroll.

[0004] In addition, the compressors mentioned above can be divided into mechanical compressors that use an engine and electric compressors that use an electric motor (hereinafter referred to as "electric compressors") according to their driving method.

[0005] Here, the electric compressor includes a motor that generates power, a compression mechanism that receives power from the motor to compress the refrigerant, and an inverter that controls the motor, such as... Figure 1 and Figure 2 It is housed within the space formed by the housing and the inverter cover.

[0006] Figure 1 To illustrate a perspective view of an existing electric compressor, Figure 2 To show Figure 1 A sectional view of the fastening part between the inverter cover and the housing in an electric compressor, specifically a sectional view taken at the location of the fastening component. Figure 3 To show Figure 1 A cross-sectional view of the fastening part between the inverter cover and the housing in an electric compressor, that is, a cross-sectional view taken from the position away from the fastening member.

[0007] Reference Figures 1 to 3 In existing electric compressors, housing 12 includes an opening 12b and an outer wall 12a forming the opening 12b. An inverter is inserted into the opening 12b, and a cover 13 is fastened to the outer wall 12a and covers the opening 12b.

[0008] Here, the cover 13 includes a plurality of fastening holes 13a arranged along the periphery of the cover 13 and passing through the cover 13. A plurality of fastening grooves 12ad are formed on the end face 12aa of the outer wall 12a, and each fastening groove 12ad communicates with one of the plurality of fastening holes 13a. Furthermore, the cover 13 is fastened to the outer wall 12a by a plurality of fastening members 14 passing through one of the plurality of fastening holes 13a and inserted into one of the plurality of fastening grooves 12ad.

[0009] Furthermore, in order to reduce noise and vibration, the cover 13 is formed as a sandwich structure, including: a flat damping layer L3 having a first surface L31 opposite to the shell 12 and a second surface L32 constituting the back side of the first surface L31; a flat first panel layer L1 bonded to the first surface L31; and a flat second panel layer L2 bonded to the second surface L32.

[0010] Furthermore, in order to reduce thickness and weight, the thickness of the damping layer L3, the first panel layer L1 and the second panel layer L2 in the cover 13 is not greater than a predetermined thickness, and the first panel layer L1 and the second panel layer L2 are made of aluminum.

[0011] Unspecified reference numeral 15 is a sealing member located between the cover 13 and the outer wall 12a, used to seal the opening 12b.

[0012] However, in this existing electric compressor, there is a problem: in a certain area of ​​the periphery of the cover 13, the distance between the cover 13 and the end face 12aa of the outer wall 12a is greater than a predetermined level. Specifically, at the location where the fastening hole 13a is formed in the periphery of the cover 13, the surface pressure between the cover 13 and the outer wall 12a is large, therefore... Figure 2 As shown, the distance between the cover 13 and the outer wall 12a is less than or equal to a predetermined level; however, at the periphery of the cover 13 away from the fastening hole 13a (e.g., the portion between two adjacent fastening holes 13a), the surface pressure between the cover 13 and the outer wall 12a is small, therefore... Figure 3As shown, the distance between the cover 13 and the outer wall 12a is greater than a predetermined level. Furthermore, as described above, when the damping layer L3, the thickness of the first panel layer L1, and the second panel layer L2 are all no greater than a predetermined thickness, and the first panel layer L1 and the second panel layer L2 are made of aluminum, the cover 13 has low stiffness and is easily deformed. Consequently, at the portion of the cover 13 that exits from the fastening hole 13a, the surface pressure between the cover 13 and the outer wall 12a becomes smaller, resulting in a greater distance between the cover 13 and the outer wall 12a than the predetermined level. The resulting problem is that foreign objects can flow into the opening 12b, i.e., the inverter housing space, through the gap between the cover 13 and the outer wall 12a. Here, even if the sealing member 15 is provided in the gap between the cover 13 and the outer wall 12a, when the distance between the cover 13 and the outer wall 12a is greater than a predetermined level, the surface pressure between the cover 13 and the sealing member 15 and the surface pressure between the outer wall 12a and the sealing member 15 decreases, and foreign objects will flow into the opening 12b through the gap between the cover 13 and the sealing member 15 and the gap between the outer wall 12a and the sealing member 15.

[0013] Furthermore, as described above, when the cover 13 is formed as a sandwich structure in which the damping layer L3 is sandwiched between the first panel layer L1 and the second panel layer L2, moisture will penetrate between the first panel layer L1 and the second panel layer L2 through the outer peripheral surface of the cover 13 exposed to the outside, thereby causing corrosion and spreading, resulting in the problem of the first panel layer L1 and the second panel layer L2 peeling off from the damping layer L3. Summary of the Invention

[0014] Therefore, the object of the present invention is to provide an electric compressor capable of preventing foreign objects from entering the inverter housing space.

[0015] Furthermore, another object of the present invention is to provide an electric compressor that, when the cover is formed in a structure in which a damping layer is sandwiched between two panel layers, can suppress corrosion and suppress the peeling of the two panel layers from the damping layer.

[0016] To achieve the above objectives, the present invention provides an electric compressor, comprising: a motor for generating power; a compression mechanism for receiving power from the motor to compress a refrigerant; an inverter for controlling the motor; a housing having an opening for insertion of the inverter and an outer wall forming the opening; and a cover fastened to the outer wall and covering the opening; the cover comprising: a damping layer having a first surface opposite to the housing and a second surface forming the back surface of the first surface; a first panel layer bonded to the first surface; and a second panel layer bonded to the second surface; at least a portion of the periphery of the cover comprising a bend formed by bending the cover containing the damping layer.

[0017] The cover may include a plurality of fastening holes arranged along the periphery of the cover and passing through the cover. The housing includes a plurality of fastening grooves that are connected to one of the fastening holes. A plurality of fastening members are provided that pass through one of the fastening holes and are inserted into one of the fastening grooves. The curved portion is formed in the portion with the longest distance between any fastening hole in the plurality of fastening holes and the fastening hole adjacent to the arbitrary fastening hole.

[0018] The aforementioned curved portion may be located at the radial end of the aforementioned cover.

[0019] The aforementioned curved portion can be located radially outward from the outer periphery of the aforementioned outer wall.

[0020] The aforementioned curved portion can have a structure that protects the inverter from external impacts.

[0021] The cover may include an opening overlap portion that overlaps with the opening, an end face overlap portion that overlaps with the end face of the outer wall, and an outer peripheral face overlap portion that overlaps with the outer peripheral face of the outer wall. The end face overlap portion includes a first end face overlap portion extending from the opening overlap portion. The outer peripheral face overlap portion includes a first outer peripheral face overlap portion that bends from the first end face overlap portion. The bend portion includes a first bend portion formed between the first end face overlap portion and the first outer peripheral face overlap portion.

[0022] The aforementioned overlapping portion of the outer peripheral surface may further include a second overlapping portion of the outer peripheral surface that bends from the aforementioned first overlapping portion of the outer peripheral surface, and the aforementioned bent portion may further include a second bent portion formed between the aforementioned first overlapping portion of the outer peripheral surface and the aforementioned second overlapping portion of the outer peripheral surface.

[0023] The aforementioned end face overlap may further include a second end face overlap that bends from the aforementioned second outer peripheral face overlap, and the aforementioned bend may further include a third bend formed between the aforementioned second outer peripheral face overlap and the aforementioned second end face overlap.

[0024] The second outer peripheral overlapping portion can be formed to be arranged on the opposite side of the outer wall with the first outer peripheral overlapping portion as a reference, and the second end overlapping portion can be formed to be arranged on the opposite side of the outer wall with the first end overlapping portion as a reference.

[0025] The second outer peripheral overlapping portion can be formed to be arranged between the first outer peripheral overlapping portion and the outer wall, and the second end overlapping portion can be formed to be arranged between the first end overlapping portion and the outer wall.

[0026] The cover may include an opening overlap portion that overlaps with the opening and an end face overlap portion that overlaps with the end face of the outer wall. The end face overlap portion includes a first end face overlap portion extending from the opening overlap portion and a second end face overlap portion that bends from the first end face overlap portion. The bend portion includes a seventh bend portion formed between the first end face overlap portion and the second end face overlap portion.

[0027] The aforementioned second end face overlap portion can be formed to be arranged on the opposite side of the aforementioned outer wall with the aforementioned first end face overlap portion as a reference.

[0028] The aforementioned second end face overlap portion can be formed to be arranged between the aforementioned first end face overlap portion and the aforementioned outer wall.

[0029] The cover may include an opening overlap portion that overlaps with the opening, an end face overlap portion that overlaps with the end face of the outer wall, and an inner circumferential overlap portion that overlaps with the inner circumferential surface of the outer wall. The inner circumferential overlap portion includes a first inner circumferential overlap portion that bends from the opening overlap portion, and a second inner circumferential overlap portion that bends from the first inner circumferential overlap portion and is arranged between the first inner circumferential overlap portion and the outer wall. The end face overlap portion bends from the second inner circumferential overlap portion. The bend portion includes a fourth bend portion formed between the opening overlap portion and the first inner circumferential overlap portion, a fifth bend portion formed between the first inner circumferential overlap portion and the second inner circumferential overlap portion, and a sixth bend portion formed between the second inner circumferential overlap portion and the end face overlap portion.

[0030] The distance between the first panel layer and the second panel layer at the aforementioned bend can be made smaller than the distance between the first panel layer and the second panel layer at locations other than the aforementioned bend in the cover.

[0031] An electric compressor according to the present invention includes: an electric motor for generating power; a compression mechanism for receiving power from the electric motor to compress a refrigerant; an inverter for controlling the electric motor; a housing having an opening for insertion of the inverter and an outer wall forming the opening; and a cover fastened to the outer wall and covering the opening; the cover includes: a damping layer having a first surface opposite to the housing and a second surface forming the back surface of the first surface; a first panel layer bonded to the first surface; and a second panel layer bonded to the second surface; at least a portion of the periphery of the cover includes a bend formed by bending the cover containing the damping layer, thereby preventing foreign objects from entering the opening, i.e., the inverter receiving space, and preventing corrosion of the cover and peeling of the first panel layer and the second panel layer from the damping layer. Attached Figure Description

[0032] Figure 1 To illustrate a perspective view of an existing electric compressor,

[0033] Figure 2 To show Figure 1 A sectional view of the fastening parts between the inverter cover and the housing in an electric compressor, specifically a sectional view taken at the location of the fastening components.

[0034] Figure 3 To show Figure 1 A sectional view of the fastening part between the inverter cover and the housing in an electric compressor, specifically a sectional view taken from the position away from the fastening member.

[0035] Figure 4 To illustrate a perspective view of an electric compressor according to an embodiment of the present invention,

[0036] Figure 5 To show Figure 4 A sectional view of the fastening parts between the inverter cover and the housing in an electric compressor, specifically a sectional view taken at the location of the fastening components.

[0037] Figure 6 To show Figure 4 A sectional view of the fastening part between the inverter cover and the housing in an electric compressor, specifically a sectional view taken from the position away from the fastening member.

[0038] Figures 7 to 11 These are cross-sectional views showing the fastening parts between the inverter cover and the housing in an electric compressor according to other embodiments of the present invention. Detailed Implementation

[0039] The electric compressor of the present invention will now be described in detail.

[0040] An embodiment of the present invention relates to an electric compressor that may include a motor that generates power, a compression mechanism that receives power from the motor to compress a refrigerant, and an inverter that controls the motor.

[0041] The aforementioned compression mechanism can be configured as a scroll type, including a fixed scroll and a rotary scroll that forms a compression chamber together with the fixed scroll, but it is not limited to this. It can also be configured as a crankshaft type, a swashplate type, a blade rotation type, etc.

[0042] The motor may include a stator fixed inside the main housing 120 and a rotor located inside the stator and rotating through interaction with the stator. The rotor may be connected to the compression mechanism via a drive shaft.

[0043] The inverter described above may include various components required for inverter control and a substrate on which the aforementioned components are mounted.

[0044] On the other hand, such as Figures 4 to 6 As shown, the electric compressor involved in this embodiment may further include: a housing 120 having an opening 124 for inserting the inverter and an outer wall 122 forming the opening 124; and a cover 130 fastened to the outer wall 122 and covering the opening 124.

[0045] Referring to a perspective view of an electric compressor according to an embodiment of the present invention Figure 4 and Figure 5 The cover 130 includes a plurality of fastening holes 139 arranged along the periphery of the cover 130 and passing through the cover 130 respectively. A plurality of fastening grooves 122d are formed on the end face 122a of the outer wall 122, which are respectively connected to one of the plurality of fastening holes 139.

[0046] Furthermore, the cover 130 can be fastened to the outer wall 122 by a plurality of fastening members 140 that pass through one of the plurality of fastening holes 139 and are inserted into one of the plurality of fastening grooves 122d.

[0047] Furthermore, refer to the following: Figure 4 A cross-sectional view of the fastening part between the inverter cover 130 and the housing 120 in the electric compressor. Figure 5 and Figure 6 In order to reduce noise and vibration, the aforementioned cover 130 can be formed as a so-called sandwich structure.

[0048] Specifically, the cover 130 may include a first panel layer L1 and a second panel layer L2 formed of metal material, and a damping layer L3 formed of viscoelastic damping material and located between the first panel layer L1 and the second panel layer L2. The damping layer L3 may include a first surface L31 opposite to the housing 120 and a second surface L32 constituting the back side of the first surface L31. The first panel layer L1 may be bonded to the first surface L31, and the second panel layer L2 may be bonded to the second surface L32.

[0049] In order to reduce thickness and weight, the thickness of the damping layer L3, the first panel layer L1 and the second panel layer L2 in the cover 130 can be formed to be no greater than a predetermined thickness.

[0050] Furthermore, in order to further reduce thickness and weight, the first panel layer L1 and the second panel layer L2 in the cover 130 can be made of aluminum.

[0051] Furthermore, referring to Figures 4 to 6 The periphery of the cover 130 may include a curved portion formed by bending the cover 130 containing the damping layer L3.

[0052] Specifically, the cover 130 includes an opening overlap portion 132 that overlaps with the opening 124, an end face overlap portion that overlaps with the end face 122a of the outer wall 122, and an outer peripheral face overlap portion that overlaps with the outer peripheral face 122c of the outer wall 122. The end face overlap portion includes a first end face overlap portion 135 extending from the opening overlap portion 132. The outer peripheral face overlap portion includes a first outer peripheral face overlap portion 137 that bends from the first end face overlap portion 135. The bend portion may include a first bend portion B1 formed between the first end face overlap portion 135 and the first outer peripheral face overlap portion 137.

[0053] Furthermore, due to the aforementioned curved portion, the rigidity of the cover 130 is increased, thereby suppressing deformation of the cover 130. Therefore, when the cover 130 is fastened to the outer wall 122 by the fastening member 140, as... Figure 6As shown, deformation of the portion of the periphery of the cover 130 that exits from the fastening hole 139 in a direction away from the end face 122a of the outer wall 122 can be suppressed. Therefore, at the portion of the periphery of the cover 130 that exits from the fastening hole 139, the surface pressure reduction between the cover 130 and the end face 122a of the outer wall 122 can be suppressed, and the distance between the cover 130 and the end face 122a of the outer wall 122 can be suppressed from exceeding a predetermined level. That is, the distance between the cover 130 and the end face 122a of the outer wall 122 can generally be less than or equal to a predetermined level. Therefore, foreign objects can be prevented from flowing into the opening 124, i.e., the inverter housing space, through the gap between the cover 130 and the end face 122a of the outer wall 122, thereby preventing damage to the inverter. Furthermore, there is no need to increase the thickness of the cover 130 or change the material of the cover 130 to a high-strength material in order to increase the rigidity of the cover 130, thus avoiding an increase in the size and weight of the cover 130.

[0054] Furthermore, since the aforementioned curved portion includes the first curved portion B1 located radially outward from the outer peripheral surface 122c of the outer wall 122, the gap between the cover 130 and the end face 122a of the outer wall 122 can be blocked by the first curved portion B1. This further suppresses foreign objects from flowing into the opening 124 through the gap between the cover 130 and the end face 122a of the outer wall 122. In addition, the inverter can be protected from external impacts by the first curved portion B1.

[0055] Furthermore, even if moisture permeates through the outer peripheral surface of the cover 130 exposed to the outside and corrodes between the first panel layer L1 and the second panel layer L2, the labyrinth seal effect at the bend can inhibit the propagation of moisture and corrosion toward the center of the cover 130.

[0056] Furthermore, the cover 130 is formed by bending its periphery to create the aforementioned curved portion after the flat damping layer L3 is bonded to the flat first panel layer L1 and the flat second panel layer L2. The distance between the first panel layer L1 and the second panel layer L2 at the curved portion of the cover 130 can be smaller than the distance between the first panel layer L1 and the second panel layer L2 at other locations of the cover 130 (e.g., the first end face overlap 135, the first outer peripheral face overlap 137). That is, the propagation path of permeating moisture and corrosion can be narrowed. Therefore, the propagation of moisture and corrosion from the periphery to the center of the cover 130 through the space between the first panel layer L1 and the second panel layer L2 can be further suppressed.

[0057] Furthermore, as the spread of moisture and corrosion is suppressed, at least one of the first panel layer L1 and the second panel layer L2 can be prevented from peeling off from the damping layer L3.

[0058] On the other hand, in this embodiment, the aforementioned bend is formed throughout the entire periphery of the cover 130, but it is not limited to this. That is, the bend may not be formed in areas of relatively high surface pressure, such as the locations where the fastening holes 139 are formed, while the bend may be formed in areas of relatively low surface pressure, such as the locations away from the fastening holes 139. As a specific example, when the interval between any of the plurality of fastening holes 139 on the periphery of the cover 130 and its adjacent fastening holes 139 is referred to as a weak interval, the bend may be formed in the weak interval. In this case, the increase in the weight of the cover 130 can be suppressed, while the rigidity of the cover 130 can be effectively increased.

[0059] Here, multiple weak zones can be formed, and the distance between these weak zones can be different from each other. In this case, the weak zone with the longest distance among the multiple weak zones may have the lowest surface pressure. Considering this, when the aforementioned curved portion is formed only on a portion of the periphery of the aforementioned cover 130, preferably, the curved portion is formed in the weak zone with the longest distance among the multiple weak zones.

[0060] On the other hand, in this embodiment, a sealing member 150 is provided between the cover 130 and the end face 122a of the outer wall 122, but this is not a limitation. That is, when the sealing member 150 is provided, although it can prevent foreign objects from flowing into the opening 124 through the gap between the cover 130 and the end face 122a of the outer wall 122, when the surface pressure between the cover 130 and the end face 122a of the outer wall 122 is insufficient, foreign objects may flow into the opening 124 through the gap between the cover 130 and the sealing member 150 and the gap between the end face 122a of the outer wall 122 and the sealing member 150. Conversely, even without the sealing member 150, when the surface pressure between the cover 130 and the end face 122a of the outer wall 122 is sufficient, it is also possible to prevent foreign objects from flowing into the opening 124 through the gap between the cover 130 and the end face 122a of the outer wall 122. From this perspective, the aforementioned curved portion can suppress foreign objects from entering the aforementioned opening 124 with little effect from the presence or absence of the aforementioned sealing member 150. Therefore, when the aforementioned curved portion is provided, the aforementioned sealing member 150 can also be omitted.

[0061] On the other hand, this embodiment only provides the aforementioned first curved portion B1, but is not limited to this.

[0062] For example, such as Figure 7 and Figure 8 As shown, the aforementioned overlapping portion of the outer peripheral surface may further include a second overlapping portion 138 that bends from the first overlapping portion 137 of the outer peripheral surface, and the bending portion may further include a second bending portion B2 formed between the first overlapping portion 137 of the outer peripheral surface and the second overlapping portion 138 of the outer peripheral surface. In this case, since the bending portion is formed as a double structure, it can further suppress the entry of foreign objects into the opening 124, and can further suppress the propagation of moisture and corrosion between the first panel layer L1 and the second panel layer L2.

[0063] And, as Figure 7 and Figure 8 As shown, the aforementioned end-face overlap may further include a second end-face overlap 136 that bends from the second outer peripheral overlap 138, and the aforementioned bend may further include a third bend B3 formed between the second outer peripheral overlap 138 and the second end-face overlap 136. In this case, since the aforementioned bend is formed as a triple structure, it can further suppress the entry of foreign objects into the aforementioned opening 124, and can further suppress the propagation of moisture and corrosion between the aforementioned first panel layer L1 and the aforementioned second panel layer L2.

[0064] Here, as Figure 7 As shown, the second outer peripheral overlapping portion 138 can be formed on the opposite side of the outer wall 122, based on the first outer peripheral overlapping portion 137, and the second end overlapping portion 136 can be formed on the opposite side of the outer wall 122, based on the first end overlapping portion 135. In this case, since the outer peripheral surface of the second end overlapping portion 136 is exposed to the outside, moisture may penetrate between the first panel layer L1 and the second panel layer L2 of the second end overlapping portion 136 and cause corrosion. Of course, in this case, the propagation of moisture and corrosion from the second end overlapping portion 136 to the second outer peripheral overlapping portion 138 can be suppressed by the third bending portion B3.

[0065] However, in order to prevent moisture from penetrating between the first panel layer L1 and the second panel layer L2 of the second end face overlap 136 and causing corrosion, such as Figure 8 As shown, the second outer peripheral overlapping portion 138 can be formed to be arranged between the first outer peripheral overlapping portion 137 and the outer wall 122, and the second end overlapping portion 136 can be formed to be arranged between the first end overlapping portion 135 and the outer wall 122.

[0066] However, in Figure 7 In the case shown, the aforementioned curved portion can be formed on the entire periphery or part of the periphery of the cover 130, while Figure 8 In the case shown, the aforementioned bend must be formed along the entire periphery of the cover 130. This is because, when the aforementioned bend is as shown... Figure 8 When the curve is formed only on a portion of the periphery of the cover 130, a considerable gap will be generated between the first end face overlap 135 and the end face 122a of the outer wall 122 in the portion of the periphery of the cover 130 where the curve is not formed.

[0067] As another example, such as Figure 9 As shown, the cover 130 may include an inner circumferential surface overlap portion that overlaps with the inner circumferential surface 122b of the outer wall 122, instead of including the outer circumferential surface overlap portion. The inner circumferential surface overlap portion includes a first inner circumferential surface overlap portion 133 that bends from the opening overlap portion 132 and a second inner circumferential surface overlap portion 134 that bends from the first inner circumferential surface overlap portion 133 and is arranged between the first inner circumferential surface overlap portion 133 and the outer wall 122. The end face overlap portion can be bent from the second inner circumferential surface overlap portion 134. In this case, the bent portion may include a fourth bent portion B4 formed between the opening overlap portion 132 and the first inner circumferential surface overlap portion 133, a fifth bent portion B5 formed between the first inner circumferential surface overlap portion 133 and the second inner circumferential surface overlap portion 134, and a sixth bent portion B6 formed between the second inner circumferential surface overlap portion 134 and the end face overlap portion. In this case, unlike the previous embodiment, the curved portion is not located at the radial end of the cover 130, but rather at a position further radially inward than the inner circumferential surface 122b of the outer wall 122. Therefore, the gap between the cover 130 and the end face 122a of the outer wall 122 can be blocked by the first inner circumferential surface overlap 133 and the second inner circumferential surface overlap 134 on the opening 124 side. Thus, even if foreign matter enters the gap between the cover 130 and the end face 122a of the outer wall 122 from the outside, it will not flow into the opening 124. Furthermore, in this case, since the curved portion is formed with a double structure, it can further suppress the entry of foreign matter into the opening 124, and further suppress the propagation of moisture and corrosion between the first panel layer L1 and the second panel layer L2. However, in this case, moisture penetration and corrosion may occur at the end face overlap. Furthermore, the first inner circumferential surface overlap 133 and the second inner circumferential surface overlap 134 cannot be formed only on a portion of the periphery of the cover 130. That is, the curved portion must be formed on the entire periphery of the cover 130.

[0068] As yet another example, such as Figure 10 and Figure 11As shown, the cover 130 does not include the aforementioned outer peripheral surface overlap and the aforementioned inner peripheral surface overlap. The aforementioned end surface overlap includes a second end surface overlap 136 that bends from the aforementioned first end surface overlap 135. The aforementioned bend may include a seventh bend B7 formed between the aforementioned first end surface overlap 135 and the aforementioned second end surface overlap 136. In this case, the aforementioned bend is located at the radial end of the cover 130 and is located radially outward than the outer peripheral surface 122c of the aforementioned outer wall 122, but it is not formed as a multi-structure nor does it form a structure that creates a shielding gap. Therefore, the effect of increased stiffness of the cover 130 and the effect of inhibiting the spread of moisture and corrosion are similar to those of the cover 130. Figures 4 to 6 The embodiment shown is similar, but it cannot achieve the effect of blocking the gap between the cover 130 and the end face 122a of the outer wall 122 by the above-mentioned curved portion.

[0069] Here, as Figure 10 As shown, when the second end face overlap 136 is formed and arranged on the opposite side of the outer wall 122 with the first end face overlap 135 as a reference, it is similar to... Figure 7 Similar to the illustrated embodiment, the second end face overlap 136 can be formed on the entire periphery or part of the periphery of the cover 130, but moisture penetration and corrosion may occur at the second end face overlap 136. Of course, the propagation of moisture and corrosion from the second end face overlap 136 to the first end face overlap 135 can be suppressed by the seventh bend B7.

[0070] Conversely, such as Figure 11 As shown, when the second end face overlap 136 is formed and arranged between the first end face overlap 135 and the outer wall 122, it is similar to... Figure 8 Similar to the embodiment shown, it can also prevent moisture penetration and corrosion at the second end face overlap 136, but the second end face overlap 136 must be formed on the entire periphery of the cover 130.

Claims

1. An electric compressor, wherein, include: An electric motor generates power; A compression mechanism that receives power from the motor to compress the refrigerant; Inverter, controlling the motor; The housing has an opening for insertion of the inverter and an outer wall forming the opening; as well as A cover, fastened to the outer wall and covering the opening; The cover includes: a damping layer having a first side opposite to the housing and a second side forming the back of the first side; a first panel layer bonded to the first side; and a second panel layer bonded to the second side; At least a portion of the periphery of the cover includes a bend formed by bending the cover containing the damping layer.

2. The electric compressor according to claim 1, wherein, The cover includes a plurality of fastening holes arranged along the periphery of the cover and penetrating the cover. The housing includes a plurality of fastening grooves that are respectively connected to one of the plurality of fastening holes. The electric compressor is provided with a plurality of fastening components that pass through one of the plurality of fastening holes and are inserted into one of the plurality of fastening slots. The curved portion is formed at the longest distance between any of the plurality of fastening holes and the fastening hole adjacent to that arbitrary fastening hole.

3. The electric compressor according to claim 1, wherein, The curved portion is located at the radial end of the cover.

4. The electric compressor according to claim 3, wherein, The curved portion is located radially outward from the outer peripheral surface of the outer wall.

5. The electric compressor according to claim 4, wherein, The curved section has a structure that protects the inverter from external impacts.

6. The electric compressor according to claim 4, wherein, The cover includes an opening overlap portion that overlaps with the opening, an end face overlap portion that overlaps with the end face of the outer wall, and an outer peripheral face overlap portion that overlaps with the outer peripheral face of the outer wall. The end face overlap includes a first end face overlap extending from the opening overlap. The overlapping portion of the outer peripheral surface includes a first overlapping portion of the outer peripheral surface that bends from the first overlapping portion of the end surface. The curved portion includes a first curved portion formed between the first end face overlap portion and the first outer peripheral face overlap portion.

7. The electric compressor according to claim 6, wherein, The overlapping portion of the outer peripheral surface also includes a second overlapping portion of the outer peripheral surface that bends from the first overlapping portion of the outer peripheral surface. The curved portion further includes a second curved portion formed between the first overlapping portion of the outer peripheral surface and the second overlapping portion of the outer peripheral surface.

8. The electric compressor according to claim 7, wherein, The overlapping portion of the end face also includes a second overlapping portion of the end face that bends from the second overlapping portion of the outer peripheral face. The curved portion further includes a third curved portion formed between the second outer peripheral surface overlap portion and the second end surface overlap portion.

9. The electric compressor according to claim 8, wherein, The second outer peripheral surface overlap is formed such that it is arranged on the opposite side of the outer wall with the first outer peripheral surface overlap as a reference. The second end face overlap is formed to be arranged on the opposite side of the outer wall with reference to the first end face overlap.

10. The electric compressor according to claim 8, wherein, The second outer peripheral surface overlap is formed to be disposed between the first outer peripheral surface overlap and the outer wall. The second end face overlap is formed to be disposed between the first end face overlap and the outer wall.

11. The electric compressor according to claim 4, wherein, The cover includes an opening overlap portion that overlaps with the opening and an end face overlap portion that overlaps with the end face of the outer wall. The end face overlap portion includes a first end face overlap portion extending from the opening overlap portion and a second end face overlap portion bent from the first end face overlap portion. The curved portion includes a seventh curved portion formed between the first end face overlap portion and the second end face overlap portion.

12. The electric compressor according to claim 11, wherein, The second end face overlap is formed to be arranged on the opposite side of the outer wall with reference to the first end face overlap.

13. The electric compressor according to claim 11, wherein, The second end face overlap is formed to be disposed between the first end face overlap and the outer wall.

14. The electric compressor according to claim 1, wherein, The cover includes an opening overlap portion that overlaps with the opening, an end face overlap portion that overlaps with the end face of the outer wall, and an inner circumferential surface overlap portion that overlaps with the inner circumferential surface of the outer wall. The inner circumferential surface overlap portion includes a first inner circumferential surface overlap portion that bends from the opening overlap portion, and a second inner circumferential surface overlap portion that bends from the first inner circumferential surface overlap portion and is arranged between the first inner circumferential surface overlap portion and the outer wall. The overlapping portion of the end face bends from the overlapping portion of the second inner circumferential face. The curved portion includes a fourth curved portion formed between the opening overlapping portion and the first inner circumferential surface overlapping portion, a fifth curved portion formed between the first inner circumferential surface overlapping portion and the second inner circumferential surface overlapping portion, and a sixth curved portion formed between the second inner circumferential surface overlapping portion and the end surface overlapping portion.

15. The electric compressor according to claim 1, wherein, The distance between the first panel layer and the second panel layer at the bend is formed to be smaller than the distance between the first panel layer and the second panel layer at the portion of the cover other than the bend.

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