Electric compressor

Abstract

The present invention provides an electric compressor, which can increase the electrical conductivity between housings to prevent the generation of potential difference and ultimately reduce the risk of electric shock by providing protrusions with a constant outer diameter to at least both ends of a guide pin combined between the housings for the electric compressor.

Description

Technical Field

[0001] The present invention relates to an electric compressor, and more specifically, to an electric compressor having protrusions of constant outer diameter at at least two ends of a guide pin for joining between housings of the electric compressor, thereby ensuring contact between the housing and the guide pin, thereby increasing the electrical conductivity between the housings to prevent potential differences and ultimately reducing the risk of electric shock. Background Technology

[0002] The compressor used in a typical automotive air conditioning system performs the following functions: it draws in the refrigerant that has completed evaporation from the evaporator, transforms it into a high-temperature, high-pressure state that is easy to liquefy, and then transfers it to the condenser.

[0003] These compressors are divided into two types: mechanical compressors that receive driving force from the vehicle engine to perform compression, and electric compressors that perform compression by being driven by an electric motor supplied with an independent power source.

[0004] Here, the electric compressor is described in more detail. The existing electric compressor includes: a housing, a motor disposed inside the housing, a rotary scroll that receives power from the motor to rotate, and a fixed scroll that is fixed to the housing and forms a compression chamber together with the rotary scroll. It also includes an inverter for controlling the motor so that the refrigeration efficiency can be variably adjusted by adjusting the speed, torque, etc. of the motor.

[0005] However, in this existing electric compressor, there is a high risk of electric shock due to the potential difference between the outer casing components.

[0006] Specifically, the existing electric compressor disclosed in KR2019-0081201A includes: a central housing 120 having a main frame 122; a front housing 110 fastened to the central housing 120; a fixed scroll plate 210 fastened to the central housing 120 on the opposite side of the front housing 110, based on the main frame 122; a rotary scroll plate 220 located between the main frame 122 and the fixed scroll plate 210; and a rear housing 130 fastened to the fixed scroll plate 210 on the opposite side of the rotary scroll plate 220, based on the fixed scroll plate 210.

[0007] At this time, the central housing 120 and the front housing 110 form a space to accommodate the motor 300 that generates rotational force. Although not shown in the figure, the central housing 120 and the front housing 110 can be aligned and engaged by independent guide pins. That is, guide holes are formed in the central housing 120 and the front housing 110 respectively, and the two ends of the guide pins can be inserted into the guide holes of the central housing 120 and the front housing 110 respectively.

[0008] Here, to prevent manufacturing defects due to interference, the guide pin is formed such that its outer diameter is smaller than the inner diameter of the guide hole, and its length is less than the depth of the guide hole. However, this results in a lack of contact between the guide hole into which the guide pin is inserted and the guide pin itself. Consequently, a potential difference is generated between the housing components separated by gaskets and unable to achieve electrical connection via the guide pin.

[0009] Therefore, a short circuit occurring on a casing component with a potential difference poses an increased risk of electric shock.

[0010] In the existing electric compressor disclosed in KR2021-0098140A, in order to eliminate the potential difference between the various housing components, the guide pin includes a protrusion that protrudes radially outward from the base and has an outer diameter greater than or equal to the inner diameter of the guide hole, and the protrusion includes a groove that is recessed radially inward and extends axially.

[0011] However, in the prior art, a protrusion is formed only in the middle of the guide pin (there are no protrusions at the two ends of the guide pin), and the protrusion has a shape with the largest outer diameter at the center and the outer diameter gradually decreases as it moves toward both sides.

[0012] Therefore, when the housing is attached to the base of the guide pin without a protrusion, especially when the guide pin is excessively pressed into one side of the housing, causing the other side of the housing to be suspended in a floating state without being connected to the protrusion of the guide pin and thus unable to conduct electricity, the housings fail to connect and cannot conduct electricity, resulting in a potential difference between the housings and charge accumulation, which may cause electric shock accidents.

[0013] Existing technical documents

[0014] KR2019-0081201A (Published on July 9, 2019)

[0015] KR2021-0098140A (Published on August 10, 2021) Summary of the Invention

[0016] The purpose of this invention is to provide an electric compressor that ensures contact between the housing and the guide pin by providing protrusions with a constant outer diameter at at least two ends of the guide pin joined between the housings of the electric compressor, thereby increasing the electrical conductivity between the housings to prevent potential difference and ultimately reducing the risk of electric shock.

[0017] The technical problems to be solved by the present invention are not limited to those mentioned above. Other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

[0018] To solve the above-mentioned technical problems, one embodiment of the present invention provides an electric compressor, which includes: a housing; a compression section for compressing refrigerant; a motor section disposed within the housing and driving the compression section; and an inverter section for controlling the motor section; the housing includes two or more housing portions and is provided with at least one guide pin, the guide pin contacting adjacent housing portions among the two or more housing portions, the guide pin including a cylindrical portion with a constant diameter, and protrusions with a constant outer diameter provided at at least two ends of the cylindrical portion.

[0019] According to one embodiment, the guide pin may further include chamfered portions respectively disposed at both ends of the cylindrical portion and whose diameter gradually decreases as it faces outward.

[0020] According to one embodiment, the end face of the chamfered portion can be formed to have curvature.

[0021] According to one embodiment, the end face of the chamfered portion can be formed to have a constant angle.

[0022] According to one embodiment, the protrusion may extend along the entire length of the cylindrical portion.

[0023] According to one embodiment, one end of the guide pin can be inserted into a first guide hole of one of the adjacent housing portions, so that the protrusion contacts the interior of the first guide hole, and the other end of the guide pin can be inserted into a second guide hole of the other of the adjacent housing portions, so that the protrusion contacts the interior of the second guide hole.

[0024] According to one embodiment, the sum of the depth of the first guide hole and the depth of the second guide hole is greater than the length of the guide pin.

[0025] According to one embodiment, a sealing member may be provided between the adjacent housing portions, and the sealing member has a through hole through which the guide pin passes.

[0026] According to one embodiment, a sealing member may be provided between the adjacent housing portions, and the guide pin is arranged radially outward of the sealing member.

[0027] According to one embodiment, the guide pin may further include chamfered portions respectively disposed at both ends of the cylindrical portion and whose diameter gradually decreases as it faces outward. The maximum diameter of the cylindrical portion and the chamfered portion may be smaller than the inner diameter of the first guide hole and the second guide hole, and the outer diameter of the protrusion may be larger than the inner diameter of the first guide hole and the second guide hole.

[0028] According to one embodiment, the protrusion can be formed by deforming the guide pin by applying external pressure with a tool. A groove can be formed at the position where the tool applies pressure, and a pair of protrusions can be formed on both sides of the groove.

[0029] According to one embodiment, the protrusion may have a shape that gradually tapers towards the radially outer side of the guide pin.

[0030] According to one embodiment, the pair of protrusions may be provided in multiple portions spaced apart along the circumferential direction of the guide pin.

[0031] According to one embodiment, the guide pin may further include chamfered portions respectively disposed at both ends of the cylindrical portion and whose diameter gradually decreases as it faces outward, and the groove may be provided throughout the chamfered portions of both ends and the cylindrical portion.

[0032] According to one embodiment, an additional groove may be provided on the outer side of each of the pair of protrusions.

[0033] According to one embodiment, the two or more housing portions may include a central housing, a front housing coupled to one side of the central housing, and a rear housing coupled to the other side of the central housing. A first guide pin may be disposed between the central housing and the front housing, and a second guide pin may be disposed between the central housing and the rear housing.

[0034] According to one embodiment, the depth of the first guide pin inserted into the first guide hole of the front housing at one end may be greater than the depth of the first guide pin inserted into the second guide hole of the central housing at the other end, and the depth of the second guide pin inserted into the first guide hole of the central housing at one end may be greater than the depth of the second guide pin inserted into the second guide hole of the rear housing at the other end.

[0035] According to the present invention, by providing protrusions with a constant outer diameter at at least two ends (preferably the entire length of the cylindrical portion) of the guide pin joined between the housings of the electric compressor, contact between the housing and the guide pin can be guaranteed regardless of the depth to which the guide pin is inserted into the guide hole of the housing. Accordingly, the electrical conductivity between the housings can be increased, potential differences can be prevented, and ultimately the risk of electric shock can be reduced.

[0036] Furthermore, since the guide pin includes a cylindrical portion with a constant diameter and chamfered portions respectively provided at both ends of the cylindrical portion and whose diameter gradually decreases as they face outward, the guide pin can be easily pressed into the guide hole through the chamfered portions, thereby improving the assemblability between housings. Moreover, when the protrusion is provided throughout the entire length of the cylindrical portion, the contact and connection between the housing and the guide pin can be reliably achieved at all positions of the cylindrical portion.

[0037] The effects of the present invention are not limited to those described above, but should be understood to include all effects that can be derived from the inventive structure described in the detailed description or technical solution of the present invention. Attached Figure Description

[0038] Figure 1 This is a cross-sectional view showing an embodiment of an electric compressor according to the present invention.

[0039] Figure 2 It is shown in magnification Figure 1 A sectional view of part A.

[0040] Figure 3 It is shown in magnification Figure 2 A partial sectional view.

[0041] Figure 4 It shows from Figure 1 A three-dimensional view showing the guide pin separated from the image.

[0042] Figure 5 and Figure 6 Observed from different positions Figure 4 Side view of the guide pin.

[0043] Figure 7 yes Figure 4 The main view.

[0044] Figure 8 It is shown Figure 7 The front view of another embodiment.

[0045] Explanation of reference numerals in the attached figures

[0046] 1: Electric compressor; 100: Housing; 110: Central housing; 112: 2nd guide hole; 114: 1st guide hole; 120: Front housing; 122: 1st guide hole; 140: Rear housing; 142: 2nd guide hole; 200: Motor section; 210: Rotating shaft; 220: Rotor; 230: Stator; 300: Compression section; 310: Rotary scroll plate; 320: Fixed scroll plate; 400: Inverter section; 410: Circuit board; 420: Inverter cover; 500, 500a, 500b: Guide pins; 510: Cylindrical section; 520: Chamfered section; 522: End face; 530: Protrusion; 540: Groove; 550: Additional groove; 600: Sealing component; 602: Through hole. Detailed Implementation

[0047] Hereinafter, a preferred embodiment of the electric compressor of the present invention will be described with reference to the accompanying drawings.

[0048] Furthermore, the terms used below are defined in consideration of the functionality in this invention and may vary depending on the intent or convention of the user or operator. The following embodiments are not intended to limit the scope of the invention, but are merely exemplary descriptions of the constituent elements set forth in the claims of this invention.

[0049] To clearly illustrate the invention, irrelevant details have been omitted, and identical or similar constituent elements are labeled with the same reference numerals throughout the specification. Throughout the specification, when a part is referred to as "comprising" a constituent element, unless specifically stated otherwise, it does not mean that other constituent elements are excluded, but rather that other constituent elements may be included.

[0050] Furthermore, throughout this specification, the constituent elements referred to as "~" can be two or more constituent elements combined into one constituent element, or a constituent element can be differentiated into two or more components according to its detailed functions. Moreover, each constituent element described below, in addition to its own primary function, may also additionally perform some or all of the functions performed by other constituent elements. Of course, some of the primary functions performed by each constituent element may also be specifically performed by other constituent elements.

[0051] First, refer to Figures 1 to 3 An electric compressor 1 according to an embodiment of the present invention will be described.

[0052] The electric compressor 1 of the present invention includes: a housing 100, a motor part 200, a compression part 300, an inverter part 400, and a guide pin 500.

[0053] The housing 100 forms the overall appearance of the electric compressor 1, and refrigerant flows inside. The housing 100 includes two or more housing parts. Specifically, in this embodiment, the housing 100 includes a central housing 110, a front housing 120, and a rear housing 140. The front housing 120 is joined to one side of the central housing 110, and the front housing 120 and the central housing 110 form a space for accommodating the motor unit 200 inside. The rear housing 140 is joined to the other side of the central housing 110 on the opposite side of the front housing 120, and forms a space for accommodating the compression unit 300 inside and a discharge chamber D for accommodating refrigerant discharged from the compression chamber C.

[0054] The motor unit 200 is disposed within the space formed by the front housing 120 and the central housing 110, and provides power for the compression unit 300 to compress the refrigerant. Specifically, the motor unit 200 includes: a rotating shaft 210 rotatably disposed at the center of the front housing 120 and the central housing 110; a rotor 220 disposed on the rotating shaft 210; and a stator 230 fixed to the front housing 120 and arranged radially outward of the rotor 220. Furthermore, the stator 230 includes a stator core and a coil wound around the stator core.

[0055] The stator 230 generates an electromagnetic field by the power applied from the inverter section 400 described later. As the rotor 220 rotates under the action of the electromagnetic field generated by the stator 230, a rotational force is generated to drive the compression section 300.

[0056] The compression unit 300 compresses the refrigerant flowing into the outer casing 100. In this embodiment, the compression unit 300 is disposed within the rear outer casing 140 and specifically includes: a rotary scroll plate 310 connected to the rotating shaft 210 via an eccentric bushing; and a fixed scroll plate 320 forming, together with the rotary scroll plate 310, a compression chamber C in which the refrigerant is compressed. Thus, the compression unit 300 is connected to the motor unit 200 via the rotating shaft 210, allowing the rotational force generated by the motor unit 200 to be transmitted to the rotary scroll plate 310 of the compression unit 300 via the rotating shaft 210. However, the invention is not limited to this, and other types of compression units may also be used.

[0057] Furthermore, in this embodiment, although the compression unit 300 is disposed inside the rear housing 140, depending on the circumstances, the fixed scroll plate 320 may also be located between the central housing 110 and the rear housing 140, so that the compression unit 300 may not be disposed inside the rear housing 140.

[0058] The inverter unit 400 is arranged on one side of the front housing 120, opposite to the compressor unit 300, with the motor unit 200 as a reference. The inverter unit 400 is electrically connected to the motor unit 200, and supplies power to the motor unit 200 and controls its operation by means of power and control signals transmitted from the outside.

[0059] The inverter section 400 may include: a circuit board 410 connected to switching elements; and an inverter cover 420 which is attached to the front housing 120 to house the circuit board 410 and protect the circuit board 410 from external impacts, etc.

[0060] At this time, the motor section 200 and the inverter section 400 are electrically connected via terminal pins. Since a three-phase motor section 200 is used in this embodiment, three terminal pins, each connected to one of the three phases, are provided to supply three-phase power from the inverter section 400 to the motor section 200. The three terminal pins are electrically connected to the three-phase coils of the stator 230 and extend through the front housing 120 into the inverter section 400. Each of the three terminal pins also passes through the circuit board 410 of the inverter section and is electrically connected to the circuit board 410.

[0061] In this invention, at least one guide pin 500 is provided for attaching the housing of the electric compressor 1. The at least one guide pin 500 contacts adjacent housing portions of two or more housing portions.

[0062] Specifically, in this embodiment, the guide pin 500 is composed of a first guide pin 500a and a second guide pin 500b. The first guide pin 500a is arranged between the front housing 120 and the central housing 110 for aligning and engaging adjacent front housing 120 and central housing 110. The second guide pin 500b is arranged between the central housing 110 and the rear housing 140 for aligning and engaging adjacent central housing 110 and rear housing 140.

[0063] However, depending on the situation, when the fixed scroll plate 320 is located between the central housing 110 and the rear housing 140 and the compression part 300 is not provided inside the rear housing 140, the guide pin 500 can also be used to align and connect the adjacent front housing 120 and the central housing 110, the adjacent central housing 110 and the fixed scroll plate 320, and the adjacent fixed scroll plate 320 and the rear housing 140.

[0064] like Figure 2 As shown, one end of the guide pin 500 is inserted into the first guide hole of one of the adjacent housing portions, and the other end of the guide pin 500 is inserted into the second guide hole of the other adjacent housing portion. Thus, the protrusion 530 of the guide pin 500 (described later) contacts the interior of the first guide hole and the interior of the second guide hole, respectively.

[0065] As will be explained below, in this embodiment, the first guide hole includes the first-1 guide hole 122 and the first-2 guide hole 114, and the second guide hole includes the second-1 guide hole 112 and the second-2 guide hole 142.

[0066] Specifically, one end of the first guide pin 500a is inserted into the first-1 guide hole 122 of the front housing 120, which is adjacent to the front housing 120 and the center housing 110, and the other end of the first guide pin 500a is inserted into the second-1 guide hole 112 of the center housing 110, which is adjacent to the front housing 120 and the center housing 110. In particular, preferably, one end of the first guide pin 500a is pressed into the first-1 guide hole 122, and the other end of the first guide pin 500a is pressed into the second-1 guide hole 112.

[0067] Similarly, one end of the second guide pin 500b is inserted into the first-second guide hole 114 of the central housing 110 in the adjacent central housing 110 and rear housing 140, and the other end of the second guide pin 500b is inserted into the second-second guide hole 142 of the rear housing 140 in the adjacent central housing 110 and rear housing 140. In particular, preferably, one end of the second guide pin 500b is pressed into the first-second guide hole 114, and the other end of the second guide pin 500b is pressed into the second-second guide hole 142.

[0068] Preferably, the sum of the depth d1 of the first guide hole 122 and the depth d2 of the second guide hole 112 is greater than the length L1 of the first guide pin 500a. Similarly, preferably, the sum of the depth d3 of the first guide hole 114 and the depth d4 of the second guide hole 142 is greater than the length L2 of the second guide pin 500b. This is to ensure a problem-free connection between the guide pin and the housing, even when considering the tolerances in manufacturing the guide holes and guide pins.

[0069] like Figure 3 As shown, a sealing member 600 may be provided between adjacent central housing 110 and front housing 120. One example of the sealing member 600 is a gasket. The sealing member 600 has a through hole 602 through which the first guide pin 500a passes. Similarly, a sealing member 600 with a through hole 602 through which the second guide pin 500b passes may also be provided between adjacent central housing 110 and rear housing 140.

[0070] However, this is not the only possibility. Although a sealing element is similarly provided between adjacent housing portions, the guide pin 500 may be arranged radially outside the sealing element. In this case, by arranging the guide pin 500 outside the sealing element, a through hole for the guide pin 500 to pass through is not required in the sealing element.

[0071] Below, we will refer to Figures 4 to 7 The structure of guide pin 500 is described in detail.

[0072] In this invention, the guide pin 500 includes a cylindrical portion 510 with a constant diameter, characterized in that at least two ends of the cylindrical portion 510 are provided with protrusions 530 with a constant outer diameter. Thus, regardless of the depth to which one end of the guide pins 500a and 500b is inserted into the first guide holes 122 and 114, contact between one end of the guide pin and the first guide hole can be guaranteed. Similarly, regardless of the depth to which the other end of the guide pins 500a and 500b is inserted into the second guide holes 112 and 142, contact between the other end of the guide pin and the second guide hole can be guaranteed. As a result, the electrical conductivity between the housings can be increased, potential differences can be prevented, and charge can be released through grounding, ultimately reducing the risk of electric shock. Furthermore, the electric arcing phenomenon (discharge caused by potential difference) can be improved, thereby preventing the deterioration of the electric compressor's durability and safety accidents caused by electric arcing.

[0073] Specifically, in this embodiment, the guide pin 500 includes: a cylindrical portion 510 with a constant diameter; and chamfered portions 520 respectively disposed at both ends of the cylindrical portion 510, with the diameter gradually decreasing as it moves outward.

[0074] At this time, the protrusion 530 is provided at at least two ends of the cylindrical portion 510. Specifically, the protrusion 530 extends at least a portion from the boundary between the chamfered portion 520 and one end of the cylindrical portion 510 toward the other end of the cylindrical portion 510, and at the same time, the protrusion 530 extends at least a portion from the boundary between the chamfered portion 520 and the other end of the cylindrical portion 510 toward one end of the cylindrical portion 510.

[0075] In this embodiment, the protrusion 530 is provided along the entire length of the cylindrical portion 510, including both ends. Accordingly, contact and connection between the housing and the guide pin 500 can be reliably achieved at all positions of the cylindrical portion 510.

[0076] The maximum diameter of the cylindrical portion 510 and the chamfered portion 520 is smaller than the inner diameter of the first and second guide holes 122, 114, 112, and 142, while the outer diameter of the protrusion 530 is larger than the inner diameter of the first and second guide holes 122, 114, 112, and 142. Therefore, when the cylindrical portion 510 is inserted into each of the first and second guide holes after the chamfered portion 520, it can be pressed in through the protrusion 530.

[0077] The chamfered portion 520 facilitates the insertion of guide pins 500a and 500b into the first guide holes 122 and 114 and the second guide holes 112 and 142, thereby enabling them to be pressed in through the protrusion 530 after insertion, which improves the assemblability between housings. At this time, since the minimum depth to which guide pins 500a and 500b are inserted into the first guide holes 122 and 114 and the second guide holes 112 and 142, respectively, is ensured to be greater than the length of the chamfered portion 520, at least a portion of the cylindrical portion 510 of the guide pin 500 is inserted into the first guide holes 122 and 114 and the second guide holes 112 and 142, respectively.

[0078] like Figure 5 As shown, in this embodiment, the end face 522 of the chamfered portion 520 is formed to have a curvature. Thus, by forming the end face 522 of the chamfered portion 520 to bulge outwards and have a constant curvature, it facilitates the insertion of the guide pin into the guide hole, while preventing damage to the housing and the guide pin. Depending on the situation, the end face 522 of the chamfered portion 520 may also be formed to have a constant angle.

[0079] Thus, in this invention, since a protrusion 530 with a constant outer diameter is provided at one end and the other end of the guide pin 500, particularly along the entire length of the cylindrical portion 510, even if, for example, one end of the guide pin 500a, 500b is excessively inserted into the first guide holes 122, 114, resulting in a smaller depth at which the other end of the guide pin 500a, 500b is inserted into the second guide holes 112, 142, contact and connection between the other end of the guide pin and the second guide hole can be guaranteed. This prevents the guide pin from being suspended in a floating state due to not being connected to the housing, thus preventing the inability to conduct electricity.

[0080] In this embodiment, the protrusion 530 is formed by deforming the guide pin 500 by applying external pressure with another tool. This creates a groove 540 at the point of tool pressure, and a pair of protrusions 530 are formed on both sides of the groove 540. As a result, the protrusions 530 are formed as a pair, with a V-shaped groove 540 provided between them. Furthermore, each protrusion 530 has a shape that gradually tapers towards the radially outward direction of the guide pin 500. This V-shaped groove 540 and the pair of protrusions 530 can also be considered as forming a notch. The groove 540 is provided throughout the chamfered portions 520 and cylindrical portions 510 at both ends. The groove 540 induces and absorbs deformation of the protrusions 530 when they are pressed in.

[0081] like Figure 7 As shown, in this embodiment, a plurality of protrusions 530 are provided at intervals along the circumferential direction of the guide pin 500. The number and position of the pair of protrusions 530 in the circumferential direction can be varied.

[0082] According to one embodiment, such as Figure 8 As shown, an additional groove 550 may be provided on the outer side of each of the pair of protrusions 530. Specifically, on the outer side of each protrusion 530 opposite to the groove 540, an additional groove 550 with a depth less than the groove 540 may be provided. Thus, depending on the equipment structure, dimensions, and manufacturing method for manufacturing the protrusions 530, additional grooves 550 may also be formed on the outer side of the protrusions 530. In this case, since more grooves are formed around the protrusions, the amount of deformation increases, thereby increasing the protrusion height of the protrusions 530.

[0083] Observe the assembly process of the electric compressor 1 using guide pins 500: First, press one end of the first guide pin 500a into the front housing 120, and then press the center housing 110 into the other end of the first guide pin 500a, thereby assembling the front housing 120 and the center housing 110. Next, first press one end of the second guide pin 500b into the center housing 110, and then press the rear housing 140 into the other end of the second guide pin 500b, thereby assembling the center housing 110 and the rear housing 140. By using guide pins 500 in this way, the front housing 120, the center housing 110, and the rear housing 140 can be stacked in a sequentially aligned state.

[0084] Preferably, the depth d1 of the first guide pin 500a inserted into the first guide hole 122 of the front housing 120 is greater than the depth d2 of the second guide hole 112 of the central housing 110 into which the other end of the first guide pin 500a is inserted; and the depth d3 of the first guide pin 500b inserted into the first guide hole 114 of the central housing 110 is greater than the depth d4 of the second guide pin 500b inserted into the second guide hole 142 of the rear housing 140.

[0085] This is based on the assembly sequence of the front housing 120, the central housing 110, and the rear housing 140. By first inserting the first guide pin 500a into the first-1 guide hole 122 of the relatively deep front housing 120, and then assembling the central housing 110, the position of the first guide pin 500a is stabilized and the assembly is smooth. Similarly, by first inserting the second guide pin 500b into the first-2 guide hole 114 of the relatively deep central housing 110, and then assembling the rear housing 140, the position of the second guide pin 500b is stabilized and the assembly is smooth.

[0086] This invention is not limited to the specific embodiments and descriptions described above. Various modifications can be made by those skilled in the art without departing from the spirit of the invention as claimed, and all such modifications are within the protection scope of this invention.

Claims

1. An electric compressor, characterized in that, include: shell; The compression section that compresses the refrigerant; A motor unit disposed within the housing and driving the compression unit; and The inverter section that controls the motor section; The outer casing comprises two or more casing parts. It is also provided with at least one guide pin, which contacts adjacent housing portions among the two or more housing portions. The guide pin includes a cylindrical portion with a constant diameter. At least two ends of the cylindrical portion are provided with protrusions of constant outer diameter.

2. The electric compressor according to claim 1, characterized in that, The guide pin also includes chamfered portions located at both ends of the cylindrical portion, with the diameter gradually decreasing as it faces outward.

3. The electric compressor according to claim 2, characterized in that, The end face of the chamfered portion is formed to have curvature.

4. The electric compressor according to claim 2, characterized in that, The end face of the chamfered portion is formed to have a constant angle.

5. The electric compressor according to claim 1, characterized in that, The protrusion extends along the entire length of the cylindrical portion.

6. The electric compressor according to claim 1, characterized in that, One end of the guide pin is inserted into a first guide hole in one of the adjacent housing portions, such that the protrusion contacts the interior of the first guide hole. The other end of the guide pin is inserted into the second guide hole of another housing portion in the adjacent housing portion, so that the protrusion contacts the interior of the second guide hole.

7. The electric compressor according to claim 6, characterized in that, The sum of the depths of the first guide hole and the second guide hole is greater than the length of the guide pin.

8. The electric compressor according to claim 6, characterized in that, A sealing member is provided between the adjacent housing portions, and a through hole is formed in the sealing member for the guide pin to pass through.

9. The electric compressor according to claim 6, characterized in that, A sealing member is provided between the adjacent housing portions, and the guide pin is arranged radially outward of the sealing member.

10. The electric compressor according to claim 6, characterized in that, The guide pin also includes chamfered portions respectively disposed at both ends of the cylindrical portion, with the diameter gradually decreasing as it faces outward. The maximum diameter of the cylindrical portion and the chamfered portion is smaller than the inner diameter of the first guide hole and the second guide hole, and the outer diameter of the protrusion is larger than the inner diameter of the first guide hole and the second guide hole.

11. The electric compressor according to claim 1, characterized in that, The protrusion is formed by deforming the guide pin by applying external pressure with a tool, and a groove is formed at the position where the tool applies pressure, with a pair of protrusions formed on both sides of the groove.

12. The electric compressor according to claim 11, characterized in that, The protrusion has a shape that gradually tapers towards the radially outward direction of the guide pin.

13. The electric compressor according to claim 11, characterized in that, The pair of protrusions are spaced apart at multiple intervals along the circumferential direction of the guide pin.

14. The electric compressor according to claim 11, characterized in that, The guide pin also includes chamfered portions respectively disposed at both ends of the cylindrical portion, with the diameter gradually decreasing as it faces outward. The groove is provided throughout the chamfered portions at both ends and the cylindrical portion.

15. The electric compressor according to claim 11, characterized in that, An additional groove is provided on the outer side of each of the pair of protrusions.

16. The electric compressor according to claim 1, characterized in that, The two or more outer shell portions include a central outer shell, a front outer shell attached to one side of the central outer shell, and a rear outer shell attached to the other side of the central outer shell. The first guide pin is arranged between the central housing and the front housing, and the second guide pin is arranged between the central housing and the rear housing.

17. The electric compressor according to claim 16, characterized in that, The depth to which one end of the first guide pin is inserted into the first-1 guide hole of the front housing is greater than the depth to which the other end of the first guide pin is inserted into the second-1 guide hole of the central housing. The depth to which one end of the second guide pin is inserted into the first-2 guide hole of the central housing is greater than the depth to which the other end of the second guide pin is inserted into the second-2 guide hole of the rear housing.

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