Electric compressor

Abstract

The present invention relates to an electric compressor comprising: a motor; a compression mechanism that receives power from the motor to compress a refrigerant; an inverter for 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 includes: a damping layer having a first surface facing the housing and a second surface opposite the first surface; a first panel layer bonded to the first surface; and a second panel layer bonded to the second surface, wherein at least a portion of the perimeter of the cover includes a bending portion in which the cover including the damping layer is bent, and thus foreign matter can be prevented from entering the opening, corrosion of the cover can be inhibited, and the first and second panel layers can be prevented from separating from the damping layer.

Description

electric compressor

[0001] The present invention relates to an electric compressor, and more particularly, to an electric compressor capable of compressing a refrigerant by the driving force of a motor controlled by an inverter.

[0002] In general, a compressor is a device that compresses fluids such as refrigerant gas, and is applied to air conditioning systems in buildings, air conditioning systems in vehicles, etc.

[0003] The above compressors are classified into reciprocating compressors that compress refrigerant through reciprocating motion of a piston and rotary compressors that perform compression through rotational motion, depending on the compression method. The reciprocating compressors are classified into crank-type compressors that transmit power to multiple pistons using a crank, swash-plate compressors that transmit power to a drive shaft on which a swash plate is installed, etc., depending on the power transmission method. The rotary compressors can be classified into vane rotary compressors that use a rotating rotary shaft and vanes, and scroll compressors that use an orbiting scroll and a fixed scroll.

[0004] In addition, the compressor may be classified into a mechanical compressor using an engine and an electric compressor using a motor (hereinafter, “electric compressor”) depending on the driving method.

[0005] Here, the electric compressor includes a motor that generates power, a compression mechanism that receives power from the motor and compresses refrigerant, and an inverter that controls the motor, and the inverter is accommodated in a space formed by a housing and an inverter cover as shown in FIGS. 1 and 2.

[0006] Fig. 1 is a perspective view illustrating a conventional electric compressor, Fig. 2 is a cross-sectional view illustrating a fastening portion between an inverter cover and a housing in the electric compressor of Fig. 1, and is a cross-sectional view taken at a position where a fastening member is arranged, and Fig. 3 is a cross-sectional view illustrating a fastening portion between an inverter cover and a housing in the electric compressor of Fig. 1, and is a cross-sectional view taken at a position spaced from the fastening member.

[0007] Referring to FIGS. 1 to 3, in a conventional electric compressor, a 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) is arranged along the periphery of the cover (13) and includes a plurality of fastening holes (13a) each penetrating the cover (13), and a plurality of fastening grooves (12ad) each communicating with one of the plurality of fastening holes (13a) are formed on the front end surface (12aa) of the outer wall (12a). In addition, the cover (13) is fastened to the outer wall (12a) by a plurality of fastening members (14) each penetrating one of the plurality of fastening holes (13a) and inserted into one of the plurality of fastening grooves (12ad).

[0009] And, the cover (13) is formed as a sandwich structure including a flat damping layer (L3) having a first surface (L31) facing the housing (12) and a second surface (L32) forming the back surface of the first surface (L31), a flat first panel layer (L1) adhered to the first surface (L31), and a flat second panel layer (L2) adhered to the second surface (L32) to reduce noise and vibration.

[0010] And, in order to reduce thickness and weight, the cover (13) is formed so that each of the damping layer (L3), the first panel layer (L1) and the second panel layer (L2) is not larger than a predetermined thickness, and the first panel layer (L1) and the second panel layer (L2) are formed of aluminum material.

[0011] The unexplained symbol 15 is a sealing member interposed between the cover (13) and the outer wall (12a) to seal the opening (12b).

[0012] However, in such a conventional electric compressor, there was a problem that the distance between the cover (13) and the front end surface (12aa) of the outer wall (12a) became larger than a predetermined level in some parts of the perimeter of the cover (13). Specifically, in a part of the perimeter of the cover (13) where the fastening hole (13a) is formed, the surface pressure between the cover (13) and the outer wall (12a) is large, so that the distance between the cover (13) and the outer wall (12a) is smaller than or equal to a predetermined level, as shown in FIG. 2, but in a part of the perimeter of the cover (13) spaced apart from the fastening hole (13a) (for example, a part between two adjacent fastening holes (13a)), the surface pressure between the cover (13) and the outer wall (12a) is small, so that the distance between the cover (13) and the outer wall (12a) becomes larger than a predetermined level, as shown in FIG. 3. And, as described above, when the damping layer (L3) is provided, and the first panel layer (L1) and the second panel layer (L2) are formed to have a thickness not greater than a predetermined thickness, and the first panel layer (L1) and the second panel layer (L2) are formed of an aluminum material, the rigidity of the cover (13) is reduced and is easily deformed, and accordingly, the surface pressure between the cover (13) and the outer wall (12a) at a portion of the periphery of the cover (13) spaced apart from the fastening hole (13a) becomes smaller, and the distance between the cover (13) and the outer wall (12a) becomes larger than a predetermined level. Accordingly, there was a problem in that foreign substances flowed into the opening (12b), i.e., the inverter receiving 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), if the distance between the cover (13) and the outer wall (12a) becomes larger 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) are small, so that foreign substances 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] In addition, as described above, when the cover (13) is formed as a sandwich structure in which the damping layer (L3) is interposed between the first panel layer (L1) and the second panel layer (L2), there is a problem in that moisture penetrates 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, causing corrosion to occur and propagate, and the first panel layer (L1) and the second panel layer (L2) to separate from the damping layer (L3).

[0014] Accordingly, the present invention aims to provide an electric compressor capable of preventing foreign substances from entering an inverter receiving space.

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

[0016] The present invention provides an electric compressor, which comprises: a motor for generating power; a compression mechanism for receiving power from the motor and compressing refrigerant; an inverter for 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; wherein the cover comprises a damping layer having a first surface facing the housing and a second surface forming a back surface of the first surface, a first panel layer adhered to the first surface, and a second panel layer adhered to the second surface, and at least a portion of the periphery of the cover comprises a bending portion in which the cover including the damping layer is bent.

[0017] The cover is arranged along the periphery of the cover and includes a plurality of fastening holes each penetrating the cover, the housing includes a plurality of fastening grooves each communicating with one of the plurality of fastening holes, and a plurality of fastening members each penetrating one of the plurality of fastening holes and inserted into one of the plurality of fastening grooves are provided, and the bending portion can be formed at a portion where the distance between any of the plurality of fastening holes and a fastening hole adjacent to any of the plurality of fastening holes is the longest.

[0018] The above bending portion may be located at the radial end of the cover.

[0019] The above bending portion may be located radially outside the outer surface of the outer wall.

[0020] The above bending portion may have a structure that protects the inverter from external impact.

[0021] The cover may include an opening overlapping portion overlapping the opening, a front end overlapping portion overlapping the front end surface of the outer wall, and an outer circumferential overlapping portion overlapping the outer circumferential surface of the outer wall, wherein the front end overlapping portion includes a first front end overlapping portion extending from the opening overlapping portion, the outer circumferential overlapping portion includes a first outer circumferential overlapping portion bent from the first front end overlapping portion, and the bending portion may include a first bending portion formed between the first front end overlapping portion and the first outer circumferential overlapping portion.

[0022] The above outer circumferential overlapping portion may further include a second outer circumferential overlapping portion bent from the first outer circumferential overlapping portion, and the bending portion may further include a second bending portion formed between the first outer circumferential overlapping portion and the second outer circumferential overlapping portion.

[0023] The above-mentioned cross-section overlapping portion may further include a second cross-section overlapping portion bent from the second outer circumferential overlapping portion, and the bending portion may further include a third bending portion formed between the second outer circumferential overlapping portion and the second cross-section overlapping portion.

[0024] The second outer circumferential overlapping portion may be formed to be arranged on the opposite side of the outer wall based on the first outer circumferential overlapping portion, and the second cross-section overlapping portion may be formed to be arranged on the opposite side of the outer wall based on the first cross-section overlapping portion.

[0025] The second outer circumferential overlapping portion may be formed to be disposed between the first outer circumferential overlapping portion and the outer wall, and the second line end overlapping portion may be formed to be disposed between the first line end overlapping portion and the outer wall.

[0026] The cover may include an opening overlapping portion overlapping with the opening and a front end overlapping portion overlapping with the front end surface of the outer wall, the front end overlapping portion may include a first front end overlapping portion extending from the opening overlapping portion and a second front end overlapping portion bent from the first front end overlapping portion, and the bending portion may include a seventh bending portion formed between the first front end overlapping portion and the second front end overlapping portion.

[0027] The above second cross-section overlapping portion can be formed to be positioned on the opposite side of the outer wall with respect to the above first cross-section overlapping portion.

[0028] The above second cross-section overlapping portion can be formed to be positioned between the first cross-section overlapping portion and the outer wall.

[0029] The cover may include an opening overlapping portion overlapping with the opening, a front end overlapping portion overlapping with a front end surface of the outer wall, and an inner end overlapping portion overlapping with an inner circumferential surface of the outer wall, and the inner end overlapping portion may include a first inner circumferential overlapping portion bent from the opening overlapping portion, and a second inner circumferential overlapping portion bent from the first inner circumferential overlapping portion and positioned between the first inner circumferential overlapping portion and the outer wall, and the front end overlapping portion may be bent from the second inner circumferential overlapping portion, and the bending portion may include a fourth bending portion formed between the opening overlapping portion and the first inner circumferential overlapping portion, a fifth bending portion formed between the first inner circumferential overlapping portion and the second inner circumferential overlapping portion, and a sixth bending portion formed between the second inner circumferential overlapping portion and the front end overlapping portion.

[0030] The distance between the first panel layer and the second panel layer in the above bending portion may be formed to be smaller than the distance between the first panel layer and the second panel layer in a portion of the cover other than the bending portion.

[0031] An electric compressor according to the present invention comprises: a motor that generates power; a compression mechanism that receives power from the motor and compresses refrigerant; an inverter that controls the motor; a housing having an opening into which the inverter is inserted and an outer wall that forms the opening; and a cover that is fastened to the outer wall and covers the opening; wherein the cover includes a damping layer having a first surface facing the housing and a second surface forming a back surface of the first surface, a first panel layer adhered to the first surface, and a second panel layer adhered to the second surface, and at least a portion of the periphery of the cover includes a bending portion in which the cover including the damping layer is bent, thereby preventing foreign substances from entering the opening, i.e., the inverter receiving space, and preventing corrosion of the cover and preventing the first panel layer and the second panel layer from separating from the damping layer.

[0032] Figure 1 is a perspective view showing a conventional electric compressor.

[0033] Fig. 2 is a cross-sectional view showing the fastening portion between the inverter cover and the housing in the electric compressor of Fig. 1, and is a cross-sectional view cut at the position where the fastening member is arranged.

[0034] Fig. 3 is a cross-sectional view showing a fastening portion between an inverter cover and a housing in the electric compressor of Fig. 1, a cross-sectional view cut at a position away from the fastening member.

[0035] Figure 4 is a perspective view illustrating an electric compressor according to one embodiment of the present invention;

[0036] Fig. 5 is a cross-sectional view showing the fastening portion between the inverter cover and the housing in the electric compressor of Fig. 4, and is a cross-sectional view cut at the position where the fastening member is arranged.

[0037] Fig. 6 is a cross-sectional view showing a fastening portion between an inverter cover and a housing in the electric compressor of Fig. 4, a cross-sectional view cut at a position away from the fastening member.

[0038] Figures 7 to 11 are cross-sectional views each showing a fastening portion between an inverter cover and a housing in an electric compressor according to another embodiment of the present invention.

[0039] Hereinafter, the electric compressor according to the present invention will be described in detail.

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

[0041] The above compression mechanism may be formed as a scroll type including a fixed scroll and a rotating scroll forming a compression chamber together with the fixed scroll, but is not limited thereto, and may also be formed as a crank type, a swash plate type, a vane rotary type, etc.

[0042] The above motor includes a stator fixed inside the main housing (120) and a rotor positioned inside the stator and rotated by interaction with the stator, and the rotor can be connected to the compression mechanism through a drive shaft.

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

[0044] Meanwhile, the electric compressor according to the present embodiment may further include a housing (120) having an opening (124) into which the inverter is inserted and an outer wall (122) forming the opening (124), as shown in FIGS. 4 to 6, and a cover (130) fastened to the outer wall (122) and covering the opening (124).

[0045] Referring to FIGS. 4 and 5, which are perspective views illustrating an electric compressor according to one embodiment of the present invention, the cover (130) includes a plurality of fastening holes (139) arranged along the periphery of the cover (130) and each penetrating the cover (130), and a plurality of fastening grooves (122d) may be formed on the front end surface (122a) of the outer wall (122), each of which is connected to one of the plurality of fastening holes (139).

[0046] And, the cover (130) can be fastened to the outer wall (122) by a plurality of fastening members (140) each penetrating one of the plurality of fastening holes (139) and inserted into one of the plurality of fastening grooves (122d).

[0047] And, referring to FIG. 5 and FIG. 6, which are cross-sectional views showing the fastening portion between the inverter cover (130) and the housing (120) in the electric compressor of FIG. 4, the cover (130) can be formed in a so-called sandwich structure to reduce noise and vibration.

[0048] Specifically, the cover (130) includes a first panel layer (L1) and a second panel layer (L2) formed of a metal material, and a damping layer (L3) formed of a viscoelastic damping material and interposed between the first panel layer (L1) and the second panel layer (L2), and the damping layer (L3) includes a first surface (L31) facing the housing (120) and a second surface (L32) forming a back surface of the first surface (L31), and the first panel layer (L1) can be adhered to the first surface (L31), and the second panel layer (L2) can be adhered to the second surface (L32).

[0049] Here, the cover (130) may be formed so that each of the damping layer (L3), the first panel layer (L1), and the second panel layer (L2) has a thickness not greater than a predetermined thickness in order to reduce thickness and weight.

[0050] And, the cover (130) may be formed of aluminum material in the first panel layer (L1) and the second panel layer (L2) so that the thickness and weight can be further reduced.

[0051] And, referring to FIGS. 4 to 6, the perimeter of the cover (130) may include a bending portion in which the cover (130) including the damping layer (L3) is bent.

[0052] Specifically, the cover (130) includes an opening overlapping portion (132) overlapping with the opening (124), a leading end overlapping portion overlapping with the leading end surface (122a) of the outer wall (122), and an outer circumferential overlapping portion overlapping with the outer circumferential surface (122c) of the outer wall (122), the leading end overlapping portion includes a first leading end overlapping portion (135) extending from the opening overlapping portion (132), the outer circumferential overlapping portion includes a first outer circumferential overlapping portion (137) bent from the first leading end overlapping portion (135), and the bending portion may include a first bending portion (B1) formed between the first leading end overlapping portion (135) and the first outer circumferential overlapping portion (137).

[0053] And, as the bending portion is provided, the rigidity of the cover (130) increases, so that deformation of the cover (130) can be suppressed. Accordingly, when the cover (130) is fastened to the outer wall (122) by the fastening member (140), as illustrated in FIG. 6, deformation of a portion of the perimeter of the cover (130) spaced apart from the fastening hole (139) in a direction away from the front end surface (122a) of the outer wall (122) can be suppressed. Accordingly, a decrease in the surface pressure between the cover (130) and the front end surface (122a) of the outer wall (122) in a portion of the perimeter of the cover (130) spaced apart from the fastening hole (139) can be suppressed, and a distance between the cover (130) and the front end surface (122a) of the outer wall (122) can be suppressed from becoming larger than a predetermined level. That is, the distance between the cover (130) and the front end surface (122a) of the outer wall (122) may be smaller than or equal to a predetermined level overall. As a result, foreign substances are prevented from flowing into the opening (124), i.e., the inverter receiving space, through the gap between the cover (130) and the front end surface (122a) of the outer wall (122), thereby preventing damage to the inverter. In addition, there is no need to increase the thickness of the cover (130) or to change the material of the cover (130) to a high-strength material in order to increase the rigidity of the cover (130), so that the size and weight of the cover (130) may not increase.

[0054] And, since the bending portion includes the first bending portion (B1) located radially outside the outer surface (122c) of the outer wall (122), the gap between the cover (130) and the leading edge surface (122a) of the outer wall (122) can be covered by the first bending portion (B). Accordingly, foreign substances can be further suppressed from entering the opening (124) through the gap between the cover (130) and the leading edge surface (122a) of the outer wall (122). In addition, the inverter can be protected from external impact by the first bending portion (B1).

[0055] And, even if moisture infiltrates between the first panel layer (L1) and the second panel layer (L2) through the outer surface of the cover (130) exposed to the outside and corrosion occurs, the moisture and corrosion can be prevented from spreading toward the center of the cover (130) by the labyrinth seal effect at the bending portion.

[0056] In addition, the cover (130) is formed by bonding a flat first panel layer (L1) and a flat second panel layer (L2) to a flat damping layer (L3) and then bending the circumference to form the bending portion. The distance between the first panel layer (L1) and the second panel layer (L2) in the bending portion of the cover (130) may be smaller than the distance between the first panel layer (L1) and the second panel layer (L2) in a non-bending portion of the cover (130) (for example, the first end face overlapping portion (135), the first outer peripheral surface overlapping portion (137)). That is, the propagation path of moisture penetration and corrosion may be narrowed. Accordingly, the propagation of moisture and corrosion from the circumference of the cover (130) to the center through the first panel layer (L1) and the second panel layer (L2) may be further suppressed.

[0057] And, as the propagation of moisture and corrosion is suppressed, separation of at least one of the first panel layer (L1) and the second panel layer (L2) from the damping layer (L3) can be suppressed.

[0058] Meanwhile, in the present embodiment, the bending portion is formed around the entire circumference of the cover (130), but is not limited thereto. That is, the bending portion may not be formed in a region of relatively high surface pressure, such as a region of the circumference of the cover (130) where the fastening hole (139) is formed, and may be formed in a region of relatively low surface pressure, such as a region of the circumference of the cover (130) spaced apart from the fastening hole (139). As a specific example, if the region between any fastening hole (139) among the plurality of fastening holes (139) and a fastening hole (139) adjacent to any fastening hole (139) is defined as a vulnerable region, the bending portion may be formed in the vulnerable region. In this case, the rigidity of the cover (130) may be effectively increased while suppressing an increase in the weight of the cover (130).

[0059] Here, the above-mentioned vulnerable sections may be formed in multiple numbers, and the interval distances of the multiple vulnerable sections may be different from each other. Among the multiple vulnerable sections, the vulnerable section with the longest interval distance may have the lowest surface pressure. Considering this, when the bending portion is formed only on a portion of the perimeter of the cover (130), it may be preferable that the bending portion be preferentially formed in the vulnerable section with the longest interval distance among the multiple vulnerable sections.

[0060] Meanwhile, in the present embodiment, a sealing member (150) is provided between the cover (130) and the leading edge (122a) of the outer wall (122), but is not limited thereto. That is, when the sealing member (150) is provided, foreign substances are prevented from entering the opening (124) through the gap between the cover (130) and the leading edge (122a) of the outer wall (122), but when the surface pressure between the cover (130) and the leading edge (122a) of the outer wall (122) is insufficient, foreign substances may enter the opening (124) through the gap between the cover (130) and the sealing member (150) and the gap between the leading edge (122a) of the outer wall (122) and the sealing member (150). On the other hand, even if the sealing member (150) is not provided, if the surface pressure between the cover (130) and the leading end surface (122a) of the outer wall (122) is sufficient, foreign substances can be prevented from entering the opening (124) through the gap between the cover (130) and the leading end surface (122a) of the outer wall (122). In this respect, since the bending portion can prevent foreign substances from entering the opening (124) without being significantly affected by the presence or absence of the sealing member (150), the sealing member (150) may be omitted when the bending portion is provided.

[0061] Meanwhile, in the present embodiment, only the first bending portion (B1) is provided, but it is not limited thereto.

[0062] For example, as illustrated in FIGS. 7 and 8, the outer circumferential overlapping portion may further include a second outer circumferential overlapping portion (138) bent from the first outer circumferential overlapping portion (137), and the bending portion may further include a second bending portion (B2) formed between the first outer circumferential overlapping portion (137) and the second outer circumferential overlapping portion (138). In this case, as the bending portion is formed in two, foreign substances may be further suppressed from entering the opening (124), and moisture and corrosion may be further suppressed from spreading between the first panel layer (L1) and the second panel layer (L2).

[0063] And, as illustrated in FIGS. 7 and 8, the cross-section overlapping portion may further include a second cross-section overlapping portion (136) bent from the second outer circumferential overlapping portion (138), and the bending portion may further include a third bending portion (B3) formed between the second outer circumferential overlapping portion (138) and the second cross-section overlapping portion (136). In this case, as the bending portion is formed in a triple layer, foreign substances may be further suppressed from entering the opening (124), and moisture and corrosion may be further suppressed from spreading between the first panel layer (L1) and the second panel layer (L2).

[0064] Here, as illustrated in FIG. 7, the second outer circumferential overlapping portion (138) may be formed to be disposed on the opposite side of the outer wall (122) with respect to the first outer circumferential overlapping portion (137), and the second leading edge overlapping portion (136) may be formed to be disposed on the opposite side of the outer wall (122) with respect to the first leading edge overlapping portion (135). In this case, as the outer circumferential surface of the second leading edge overlapping portion (136) is exposed to the outside, moisture may penetrate and corrosion may occur between the first panel layer (L1) and the second panel layer (L2) of the second leading edge overlapping portion (136). Of course, in this case, the moisture and corrosion may be suppressed from propagating from the second leading edge overlapping portion (136) to the second outer circumferential overlapping portion (138) by the third bending portion (B3).

[0065] However, in order to prevent moisture from penetrating and corrosion from occurring between the first panel layer (L1) and the second panel layer (L2) of the second cross-section overlapping portion (136), as shown in FIG. 8, the second outer circumferential overlapping portion (138) may be formed to be arranged between the first outer circumferential overlapping portion (137) and the outer wall (122), and the second cross-section overlapping portion (136) may be formed to be arranged between the first cross-section overlapping portion (135) and the outer wall (122).

[0066] However, in the case illustrated in FIG. 7, the bending portion may be formed on the entire or a portion of the circumference of the cover (130), whereas in the case illustrated in FIG. 8, the bending portion must be formed on the entire circumference of the cover (130). When the bending portion is formed as in FIG. 8 but on a portion of the circumference of the cover (130), there is a significant gap between the first end face overlapping portion (135) and the end face (122a) of the outer wall (122) in the portion of the circumference of the cover (130) where the bending portion is not formed.

[0067] As another example, as illustrated in FIG. 9, the cover (130) includes an inner circumferential overlapping portion that overlaps the inner circumferential surface (122b) of the outer wall (122) instead of the outer circumferential overlapping portion, and the inner circumferential overlapping portion includes a first inner circumferential overlapping portion (133) that is bent from the opening overlapping portion (132) and a second inner circumferential overlapping portion (134) that is bent from the first inner circumferential overlapping portion (133) and is positioned between the first inner circumferential overlapping portion (133) and the outer wall (122), and the front end overlapping portion can be bent from the second inner circumferential overlapping portion (134). In this case, the bending portion may include a fourth bending portion (B4) formed between the opening overlapping portion (132) and the first inner circumferential surface overlapping portion (133), a fifth bending portion (B5) formed between the first inner circumferential surface overlapping portion (133) and the second inner circumferential surface overlapping portion (134), and a sixth bending portion (B6) formed between the second inner circumferential surface overlapping portion (134) and the front end overlapping portion. In this case, unlike the above-described embodiment, the bending portion is not located at the radial end of the cover (130), but is located radially inward of the inner circumferential surface (122b) of the outer wall (122), so that the gap between the cover (130) and the front end surface (122a) of the outer wall (122) can be covered on the opening (124) side by the first inner circumferential surface overlapping portion (133) and the second inner circumferential surface overlapping portion (134). Accordingly, even if foreign substances enter from the outside through the gap between the cover (130) and the leading edge (122a) of the outer wall (122), they may not enter the opening (124). In addition, in this case, since the bending portion is formed in two layers, foreign substances are further suppressed from entering the opening (124), and moisture and corrosion may be further suppressed from spreading between the first panel layer (L1) and the second panel layer (L2). However, in this case, moisture penetration and corrosion may occur at the overlapping portion of the leading edges.In addition, the first inner circumferential overlapping portion (133) and the second inner circumferential overlapping portion (134) cannot be formed only on a portion of the perimeter of the cover (130). That is, the bending portion must be formed on the entire perimeter of the cover (130).

[0068] As another example, as shown in FIGS. 10 and 11, the cover (130) may not include the outer circumferential overlapping portion and the inner circumferential overlapping portion, and the front end overlapping portion may include a second front end overlapping portion (136) bent from the first front end overlapping portion (135), and the bending portion may include a seventh bending portion (B7) formed between the first front end overlapping portion (135) and the second front end overlapping portion (136). In this case, since the bending portion is located at the radial end of the cover (130) and is located radially outside the outer surface (122c) of the outer wall (122), but is not formed in multiples and is not formed to cover a gap, the effect of increasing the rigidity of the cover (130) and the effect of suppressing the spread of moisture and corrosion are similar to the embodiments shown in FIGS. 4 to 6, but the effect of covering the gap between the cover (130) and the front end surface (122a) of the outer wall (122) by the bending portion cannot be obtained.

[0069] Here, as illustrated in FIG. 10, when the second leading edge overlapping portion (136) is formed to be disposed on the opposite side of the outer wall (122) with respect to the first leading edge overlapping portion (135), similarly to the embodiment illustrated in FIG. 7, the second leading edge overlapping portion (136) may be formed on the entirety or part of the periphery of the cover (130), but moisture penetration and corrosion may occur in the second leading edge overlapping portion (136). Of course, moisture and corrosion may be suppressed from propagating from the second leading edge overlapping portion (136) to the first leading edge overlapping portion (135) by the seventh bending portion (B7).

[0070] On the other hand, as shown in FIG. 11, when the second cross-section overlapping portion (136) is formed to be positioned between the first cross-section overlapping portion (135) and the outer wall (122), similarly to the embodiment shown in FIG. 8, moisture penetration and corrosion can be prevented from occurring in the second cross-section overlapping portion (136), but the second cross-section overlapping portion (136) must be formed around the entire circumference of the cover (130).

Claims

1. A motor that generates power; A compression mechanism that receives power from the above motor and compresses the refrigerant; An inverter controlling the above motor; a housing having an opening into which the inverter is inserted and an outer wall forming the opening; and A cover attached to the outer wall and covering the opening; The cover includes a damping layer having a first surface facing the housing and a second surface forming a back surface of the first surface, a first panel layer adhered to the first surface, and a second panel layer adhered to the second surface. An electric compressor comprising a bending portion in which at least a portion of the periphery of the cover includes the damping layer.

2. In paragraph 1, The cover is arranged along the perimeter of the cover and includes a plurality of fastening holes each penetrating the cover, The housing includes a plurality of fastening grooves each communicating with one of the plurality of fastening holes, A plurality of fastening members are provided, each of which penetrates one of the plurality of fastening holes and is inserted into one of the plurality of fastening grooves, An electric compressor in which the above bending portion is formed at a part with the longest distance between any one of the plurality of fastening holes and a fastening hole adjacent to the any one of the fastening holes.

3. In paragraph 1, An electric compressor in which the above bending portion is located at the radial end of the cover.

4. In paragraph 3, An electric compressor in which the above bending portion is located radially outside the outer surface of the outer wall.

5. In paragraph 4, An electric compressor having a structure in which the above bending part protects the inverter from external impact.

6. In paragraph 4, The above cover includes an opening overlapping portion overlapping the opening, a section overlapping portion overlapping the section end surface of the outer wall, and an outer circumferential overlapping portion overlapping the outer circumferential surface of the outer wall. The above-mentioned cross-section overlapping portion includes a first cross-section overlapping portion extending from the above-mentioned opening overlapping portion, The above outer circumferential overlapping portion includes a first outer circumferential overlapping portion bent from the first line cross-section overlapping portion, An electric compressor, wherein the bending portion includes a first bending portion formed between the first line cross-section overlapping portion and the first outer circumferential surface overlapping portion.

7. In paragraph 6, The above outer circumferential overlapping portion further includes a second outer circumferential overlapping portion bent from the first outer circumferential overlapping portion, An electric compressor, wherein the bending portion further includes a second bending portion formed between the first outer circumferential overlapping portion and the second outer circumferential overlapping portion.

8. In paragraph 7, The above-mentioned cross-section overlapping portion further includes a second cross-section overlapping portion bent from the second outer circumferential overlapping portion, An electric compressor, wherein the bending portion further includes a third bending portion formed between the second outer circumferential surface overlapping portion and the second front end surface overlapping portion.

9. In paragraph 8, The second outer circumferential overlapping portion is formed to be positioned on the opposite side of the outer wall based on the first outer circumferential overlapping portion, An electric compressor in which the second cross-section overlapping portion is formed to be positioned on the opposite side of the outer wall based on the first cross-section overlapping portion.

10. In paragraph 8, The second outer circumferential overlapping portion is formed to be positioned between the first outer circumferential overlapping portion and the outer wall, An electric compressor in which the second line section overlapping portion is formed to be positioned between the first line section overlapping portion and the outer wall.

11. In paragraph 4, The above cover includes an opening overlapping portion overlapping the opening and a cross-section overlapping portion overlapping the cross-section of the outer wall, The above-mentioned cross-section overlapping portion includes a first cross-section overlapping portion extending from the opening overlapping portion and a second cross-section overlapping portion bent from the first cross-section overlapping portion, An electric compressor, wherein the bending portion includes a seventh bending portion formed between the first line section overlapping portion and the second line section overlapping portion.

12. In paragraph 11, An electric compressor in which the second cross-section overlapping portion is formed to be positioned on the opposite side of the outer wall based on the first cross-section overlapping portion.

13. In paragraph 11, An electric compressor in which the second line section overlapping portion is formed to be positioned between the first line section overlapping portion and the outer wall.

14. In paragraph 1, The above cover includes an opening overlapping portion overlapping the opening, a cross-section overlapping portion overlapping the cross-section of the outer wall, and an inner circumferential overlapping portion overlapping the inner circumferential surface of the outer wall. The inner circumferential overlapping portion includes a first inner circumferential overlapping portion bent from the opening overlapping portion and a second inner circumferential overlapping portion bent from the first inner circumferential overlapping portion and positioned between the first inner circumferential overlapping portion and the outer wall, The above-mentioned cross-section overlapping portion is bent from the above-mentioned second inner circumferential overlapping portion, An electric compressor, wherein the bending portion includes a fourth bending portion formed between the opening overlapping portion and the first inner circumferential surface overlapping portion, a fifth bending portion formed between the first inner circumferential surface overlapping portion and the second inner circumferential surface overlapping portion, and a sixth bending portion formed between the second inner circumferential surface overlapping portion and the front end surface overlapping portion.

15. In paragraph 1, An electric compressor in which the distance between the first panel layer and the second panel layer in the bending portion is formed to be smaller than the distance between the first panel layer and the second panel layer in a portion of the cover other than the bending portion.

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