Vehicle compressor unit

Abstract

The compressor unit for a vehicle includes a positive displacement air compressor and an external insulation material for preventing condensation of water in the positive displacement air compressor, the external insulation material being provided on at least the surface of the body of the positive displacement air compressor. There is also a related vehicle equipped with the compressor unit.

Description

[Technical Field]

[0001] The present disclosure relates to the technical field of air compressors for use in vehicles such as commercial or rail vehicles, and more particularly to external insulation to prevent oil emulsification in positive displacement air compressors for these applications.

[0002] Background technology When the vehicle is running, the outside airflow takes a lot of heat away from the compressor, or in a low-temperature environment, the internal temperature of the compressor cannot rise fast enough, so that the internal temperature of the compressor is too low, and the moisture in the intake air condenses and mixes with the oil inside the compressor's internal parts, preventing lubrication and causing corrosion, resulting in oil emulsification, which is a serious danger to the compressor.

[0003] To solve the above-mentioned problems, the objective of the present disclosure is to propose an external insulation material for preventing oil emulsification in a positive displacement air compressor.

[0004] Summary of the Invention The purpose of this section is to summarize some aspects of embodiments of the present disclosure and to briefly describe some preferred embodiments. To avoid obscuring the purpose of this section, the Abstract of the Specification, and the Disclosure Headings, simplifications or omissions may be made in this section, as well as in the Abstract of the Specification and the Disclosure Headings, and such simplifications or omissions should not be used to limit the scope of the disclosure.

[0005] In view of the problems in the prior art, the present disclosure is proposed.

[0006] Therefore, an object of the present disclosure is to provide an external protective coating member used as a thermal insulator to prevent oil emulsification in a positive displacement air compressor, which also prevents contamination of the air compressor body by sewage, dust, and other road and rail dirt while the vehicle is in operation.

[0007] In order to solve the above technical problems, according to one aspect of the present disclosure, the present disclosure provides the following technical solutions:

[0008] A compressor unit for a vehicle, the compressor unit comprising a positive displacement air compressor, the compressor unit further comprising an external insulation material for preventing condensation of water within the positive displacement air compressor, the external insulation material being provided on at least the surface of a body of the positive displacement air compressor.

[0009] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the external insulation material comprises a protective layer and an insulating plate, the protective layer is provided on at least the surface of the body of the positive displacement air compressor, and the insulating plate is provided in a gap between the protective layer and the body of the positive displacement air compressor.

[0010] In a preferred embodiment of the compressor unit for a vehicle described in this disclosure, the body of the positive displacement air compressor is mounted at a designated position within the vehicle by the external insulation.

[0011] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the external insulation is provided with an opening, which is used for one or more of a wiring harness, pneumatic lines, and coolant lines, and / or for securing the compressor unit.

[0012] In a preferred embodiment of the vehicle compressor unit described in this disclosure, the external insulation of the positive displacement air compressor is split to facilitate maintenance and repair of the positive displacement air compressor components.

[0013] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the external insulation comprises a plurality of separately formed sections, which are removably connected to one another to cover the surface of the body of the positive displacement air compressor.

[0014] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the multiple parts include a front part covering the front end of the positive displacement air compressor body, an upper part covering the top and side parts of the positive displacement air compressor body, and a lower part covering the bottom part of the positive displacement air compressor body, and the front part, the upper part, and the lower part are formed separately.

[0015] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the external insulation is provided with an opening exposing an oil removal cartridge of the positive displacement air compressor, and the external insulation further comprises a cover adapted to removably cover the opening.

[0016] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the cover removably covers the opening with a band member.

[0017] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the external insulation has a first band fixing hole adjacent to one side of the opening and sandwiching the opening, and a second band fixing hole on the opposite side of the opening, and fasteners pass through retaining rings at both ends of the band member aligned with the first band fixing hole and the second band fixing hole, respectively, so that a cover removably covers the opening.

[0018] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the cover removably covers the opening with fasteners, and the fasteners pass through first fixing holes in the external insulation and second fixing holes in the cover.

[0019] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the external insulation is provided with a first protrusion adjacent to one side of the opening and sandwiching the opening, and a second protrusion on the opposite side of the opening, and the cover removably covers the opening by attaching retaining rings at both ends of a band member to the first protrusion and the second protrusion.

[0020] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the cover removably covers the opening by a snap connection.

[0021] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the snap connection comprises an elastic snap member provided on the cover and a slot provided in the external insulation, and the elastic snap member of the cover engages with the slot of the external insulation, thereby causing the cover to removably cover the opening.

[0022] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, the snap connection comprises an elastic snap member provided on the external insulation and a slot provided on the cover, and the elastic snap member of the external insulation engages with the slot of the cover, thereby causing the cover to removably cover the opening.

[0023] In a preferred embodiment of the compressor unit for a vehicle described in the present disclosure, said compressor unit further comprises a drive means for driving said positive displacement air compressor.

[0024] The present disclosure also provides a vehicle, said vehicle being fitted with the compressor unit described above.

[0025] In a preferred embodiment of the external insulation for preventing oil emulsification of a positive displacement air compressor described in the present disclosure, the positive displacement air compressor body is mounted at a designated position in a vehicle by the air compressor external insulation.

[0026] In a preferred embodiment of the external insulation for preventing oil emulsification of a positive displacement air compressor described in the present disclosure, the external insulation of the air compressor is provided with mounting screws and mounting screw holes.

[0027] As a preferred embodiment of the external insulation for preventing oil emulsification of a positive displacement air compressor described in the present disclosure, said external insulation of the air compressor is of a split type, which facilitates the maintenance and upkeep of the components.

[0028] In a preferred embodiment of the external insulation for preventing oil emulsification in a positive displacement air compressor described in this disclosure, the insulation panels are connected to each other by clamps.

[0029] In a preferred embodiment of the external insulation for preventing oil emulsification in a positive displacement air compressor described in this disclosure, the insulation plates are interconnected by screws and threaded clips.

[0030] The beneficial effects of the present disclosure compared to the prior art are as follows: 1. It can effectively prevent water condensation in the internal parts of the compressor, so that oil emulsification does not occur. It prevents the compressor body from being contaminated by sewage, dust, and other road and rail dirt while the vehicle is running.

[0031] 2. The split design is easy to maintain. This allows access to dedicated areas of the compressor to replace wear parts such as filter cartridges without removing the compressor from the vehicle.

[0032] In order to more clearly explain the technical solutions of the embodiments of the present disclosure, the present disclosure is described in detail below in combination with the accompanying drawings and detailed embodiments, and the accompanying drawings in the following description are only part of the embodiments of the present disclosure, and it is obvious to those skilled in the art that they can obtain other accompanying drawings according to these drawings without expending creative efforts. [Brief explanation of the drawings]

[0033] Among them, [Figure 1] FIG. 2 is a schematic diagram of the structure of the compressor unit of the present disclosure. [Figure 2]2 is a schematic diagram of the internal cavity structure of the external insulation of the compressor unit of the present disclosure. FIG. [Figure 3] FIG. 2 is a three-dimensional view of the compressor unit of the present disclosure viewed from above. [Figure 4] FIG. 2 is a three-dimensional view of the compressor unit of the present disclosure viewed from below. [Figure 5] FIG. 2 shows a three-dimensional view of the compressor unit of the present disclosure with the outer insulating member cover removed. [Figure 6] FIG. 2 is an exploded view of the external insulation of the compressor unit of the present disclosure. [Figure 7] FIG. 1 is a three-dimensional view of a first embodiment of a removable connection of a cover of an external insulation material of a compressor unit of the present disclosure. [Figure 8] 8 is a detailed cross-sectional view of the portions of circles A and B in FIG. 7. [Figure 9] FIG. 10 shows a three-dimensional view of a second embodiment of a detachable connection of a cover of an external insulation of a compressor unit of the present disclosure, with a first state of the external insulation of the second embodiment shown at the top and a second state of the external insulation shown at the bottom. [Figure 10] 10 is a detailed cross-sectional view of the portions of circles A and B in FIG. 9. [Figure 11] 11A shows a three-dimensional view of a detail of the area of circles C and A in FIG. 9, with the outer insulation cover removed at A in FIG. 11A. [Figure 12] FIG. 10 is a three-dimensional view of a third embodiment of a removable connection of a cover of an external insulation material of a compressor unit of the present disclosure. [Figure 13] 13 is a detailed cross-sectional view of the portions of circles A and B in FIG. 12. [Figure 14] FIG. 10 is a three-dimensional view of a variant of the third embodiment of the detachable connection of the cover of the external insulation of the compressor unit of the present disclosure. [Figure 15] FIG. 15 is a detailed cross-sectional view of the portion circled A in FIG. 14.

[0034] MODE FOR CARRYING OUT THE INVENTION To make the above objects, features, and advantages of the present disclosure more clear and understandable, the following description of specific embodiments of the present disclosure is given in conjunction with the accompanying drawings.

[0035] Although numerous specific details are set forth in the following description to provide a thorough understanding of the present disclosure, the present disclosure may be practiced in other ways apart from those described herein, and therefore, the present disclosure is not limited by the specific embodiments disclosed below.

[0036] Second, the present disclosure is described in detail in conjunction with schematic diagrams, and when describing the embodiments of the present disclosure in detail, for illustrative purposes, the cross-sectional views showing the structure of the device are not partially enlarged according to a general scale, and the schematic diagrams are merely examples, which do not limit the scope of protection of the present disclosure herein. In addition, the three-dimensional spatial dimensions of length, width, and depth should be included in the actual manufacturing.

[0037] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the embodiments of the present disclosure are described in more detail below in combination with the accompanying drawings.

[0038] The present disclosure provides the following technical solution: an external protective housing (i.e., external insulation) for preventing oil emulsification in a positive displacement air compressor. The external insulation also prevents contamination of the air compressor body by sewage, dust, and other road or rail dirt while the vehicle is in operation.

[0039] 1 and 2 are schematic structural diagrams of an embodiment of an external insulation material for preventing oil emulsification in a positive displacement air compressor according to the present disclosure. The main parts of the diagram include a body 1 of the positive displacement air compressor, an external insulation material 2 of the air compressor, a mounting slot 3, and a wire opening 4 of the air compressor.

[0040] Referring again to FIGS. 1 and 2 , an external insulation material 2 for the air compressor is provided on the outer wall of the positive displacement air compressor body 1. The external insulation material 2 for the air compressor includes an insulating plate 2-1 and an insulating layer 2-2 (i.e., a protective layer 2-2). The protective layer 2-2 is provided on the surface of the positive displacement air compressor body 1, and the insulating layer 2-1 is provided in the gap between the protective layer 2-2 and the positive displacement air compressor body 1. The external insulation material 2 for the air compressor may have openings (e.g., in the upper portion, the lower portion, or the side portions on both sides of the external insulation material 2). The openings may be used for one or more of a wiring harness, pneumatic lines, and coolant lines, and / or for fixing the compressor unit. In one embodiment, the openings are shown as mounting slots 3 and wire openings 4 for the air compressor, but it will be understood that other forms of openings may also be used.

[0041] Referring again to Figures 1 and 2, the positive displacement air compressor body 1 is mounted at a specified location in the vehicle by the air compressor's external insulation 2. The air compressor's external insulation 2 is provided with mounting screws and mounting screw holes. The air compressor's external insulation 2 is split, which facilitates component maintenance and repair, and the components of the split-design external insulation 2 can be connected to each other by snap fasteners or screws and clips.

[0042] The operating principle of the external insulation material 2 in this disclosure is that it can effectively prevent oil emulsification during use, which can prevent the air compressor body from being contaminated by sewage, dust, etc. during vehicle operation, improve the shock resistance of the air compressor, so that the air compressor can operate stably under adverse operating conditions, improve the service life of the air compressor, and reduce maintenance costs.

[0043] 3-5, which show three-dimensional views of a compressor unit 100 according to one embodiment of the present disclosure. The compressor unit 100 includes a positive displacement air compressor body 1 and an external insulation material 2.

[0044] The external insulation 2 is provided on the positive displacement air compressor body 1. The shape of the external insulation 2 may be adapted to the shape of the positive displacement air compressor body 1, and the external insulation 2 surrounds the positive displacement air compressor body 1 so as to at least partially or completely surround the positive displacement air compressor body 1.

[0045] The compressor unit 100 may further include a drive unit 50. The drive unit 50 is used to drive the operation of the positive displacement air compressor and may be, for example, an electric motor, a hydraulic drive unit, a gearbox, etc. The drive unit 50 is coupled to an end of the positive displacement air compressor body 1. In the embodiment, the external insulation 2 is shown as not enclosing the drive unit 50, but it should be understood that the external insulation 2 can be designed to enclose the drive unit 50, as well as both the positive displacement air compressor body 1 and the drive unit 50, if desired.

[0046] 6, the external insulation 2 may have a split design and may include multiple separately formed sections that are detachably connected to each other to cover the surface of the positive displacement air compressor body 1. The multiple sections may include a front section 21, an upper section 22, a lower section 23, and a cover 24.

[0047] In the present disclosure, the downward direction is the direction toward a conveying member such as a metal plate of the positive displacement air compressor body 1 close to the outside or a vehicle frame (not shown), the upward direction is the direction opposite to the downward direction, the rearward direction is the direction toward the end of the positive displacement air compressor body 1 coupled to the drive device 50, and the forward direction is the direction opposite to the rearward direction.

[0048] Referring to FIG. 4 , the lower part 23 covers the lower part of the positive displacement air compressor body 1, supports the positive displacement air compressor body 1, and is used to attach the positive displacement air compressor body 1 to a carrier member (not shown). The carrier member is then bolted to the chassis of the vehicle, thereby securing the positive displacement air compressor body 1 to the vehicle. The lower part 23 may be provided with insulation fixing holes 231 aligned with air compressor fixing holes (not shown) in the lower part of the positive displacement air compressor body 1. Bolts may pass through the insulation fixing holes 231 in the lower part 23 and the air compressor fixing holes in the positive displacement air compressor body 1, thereby securing the lower part 23 to the lower part of the positive displacement air compressor body 1. The lower part 23 may also be provided with mounting slots 3. The mounting slots 3 are aligned with mounting holes (not shown) in the lower part of the positive displacement air compressor body 1 and mounting holes in the carrier member. Connecting parts such as screws, studs, etc. may be passed through the mounting holes and mounting slots 3 of the carrier member and fastened to the mounting holes of the positive displacement air compressor body 1, thereby fixing the lower part 23 of the external insulation 2, the positive displacement air compressor body 1, and the carrier member to one another, and the lower part 23 of the external insulation 2 is positioned between the positive displacement air compressor body 1 and the carrier member.

[0049] Referring back to Figure 6, the upper part 22 is used to cover the top and sides of the positive displacement air compressor body 1, and is connected to the lower part 23 so as to substantially surround the positive displacement air compressor body 1 to cover the positive displacement air compressor body 1. The upper part 22 has a main body 221 that covers the top of the positive displacement air compressor body 1, and two side parts 222 that extend from the two sides of the main body 221 toward the bottom. The side parts 222 cover both sides of the positive displacement air compressor body 1. The side parts 222 are connected at their lower ends to the lower part 23 by connecting members such as screws.

[0050] The front part 21 is used to cover the front end portion of the positive displacement air compressor body 1, which is the end opposite to the end where the driving device 50 is connected to the positive displacement air compressor body 1. The front part 21 is also used to connect to the upper part 22 and the lower part 23 to substantially cover the positive displacement air compressor body 1. The two side parts of the front part 21 are connected to the two side parts 222 of the upper part 22, respectively, by connecting members such as screws.

[0051] A first notch 213 is provided on the upper edge of the front portion 21. A corresponding second notch 223 is provided on the front edge of the top portion 22. The combination of the first notch 213 and the second notch 223 can form an opening 25. As shown in FIG. 5 , the opening 25 is used to properly expose the oil removal cartridge 15 of the air compressor after the front portion 21, the top portion 22, and the bottom portion 23 are joined together to allow access to the oil removal cartridge 15 through the opening 25. The oil removal cartridge 15 is a component of a positive displacement air compressor that needs to be replaced periodically with use.

[0052] The cover 24 is adapted to cover the opening 25. The outer contour of the cover 24 can match the inner contour of the opening 25. The cover 24 is removably coupled to the front portion 21 and the top portion 22, as described in more detail below.

[0053] The front 21 and top 22 may be provided with various opening cutouts, which may be wire openings 4. The opening cutouts are used to allow the passage of components such as the air compressor wiring harness, pneumatic lines, cooling lines, etc.

[0054] The detachable connection of the cover 24 allows the oil removal cartridge 15 of the air compressor to be exposed without removing the rest of the external insulation 2, thus allowing for easy removal and replacement of the oil removal cartridge 15.

[0055] Additionally, because the front portion 21 and the top portion 22 are secured to each other or to the bottom portion 23 only by screws, the front portion 21 and the top portion 22 can be easily removed after simply disconnecting the various piping, wiring harnesses, etc. of the air compressor, thereby facilitating maintenance, repairs, and other work on other parts of the air compressor in the event of a malfunction.

[0056] It should be noted that the embodiment shown in Figures 3-5 is just one example of a divided design of the external insulation 2, and that the external insulation 2 may include any other suitable divided design. For example, the external insulation 2 may include a front portion, a cartridge portion, and a cover, where the front portion and cover are similar to the front portion 21 and cover 24 shown in Figures 3-5, and the cartridge portion includes the upper portion 22 and lower portion 23 shown in Figures 3-5 formed as an integral part. For example, the external insulation 2 may include an L-shaped portion, a front portion, and a cover, where the front portion and cover are similar to the upper portion 22 and cover 24 shown in Figures 3-5, and the L-shaped portion includes the front portion 21 and lower portion 23 shown in Figures 3-5 formed as an integral part. As a further example, the external insulation 2 may include a front portion, a first upper portion, a second upper portion, a lower portion, and a cover, where the front portion, lower portion, and cover are similar to the front portion 21, lower portion 23, and cover 24 shown in Figures 3 to 5, and the first upper portion and second upper portion are two separate parts that are formed as one piece to correspond to the upper portion 22 shown in Figures 3 to 5.

[0057] 7 to 15 each show different embodiments of the detachable connection of the cover 24. The detachable connection of the cover 24 is shown in the split design shown in Figures 3 to 5. It should be understood that the detachable connection of the cover 24 may then be applied to any other suitable split design of the external insulation 2.

[0058] Reference is made to FIG. 7, which shows a first embodiment of a detachable connection of the cover 24 .

[0059] In this embodiment, the cover 24 is removably attached to the front portion (eg, front portion 21 ) and the upper portion (eg, upper portion 22 ) of the external insulation 2 by band members 31 .

[0060] Reference is now made to Figure 8, which shows a cross-sectional view of the portions within circles A and B in Figure 7. Band fixing holes 41 are provided in the front portion 21 and the upper portion 22 adjacent to the first notch 213 and the second notch 223, respectively, and the band fixing holes 41 may be threaded holes. The band fixing holes 41 in the front portion 21 and the upper portion 22 are preferably arranged in the same plane parallel to the extension direction of the front portion of the positive displacement air compressor body 1 toward the rear portion.

[0061] The band members 31 have retaining rings 311 at their ends. Each retaining ring 311 is positioned so as to be substantially aligned with a corresponding band fixing hole 41. A screw fastener 51 passes through the aligned band fixing hole 41 and retaining ring 311 and is screwed into the band fixing hole 41, thereby fixing the band members 31 to the external insulation 2.

[0062] The length of the band member 31 may be designed to be substantially equal to the shortest distance along the outer surface of the cover 24 from the band fixing hole 41 in the front part 21 to the band fixing hole 41 in the upper part 22, or the length of the band member 31 may be designed to be slightly shorter than the shortest distance when the band member 31 is an elastic member. As a result, when the band member 31 is fixed to the external insulation 2 by the fasteners 51, the band member 31 presses the cover 24 toward the inside of the external insulation 2, thereby firmly connecting the cover 24 to the front part 21 and the upper part 22.

[0063] When the cover 24 needs to be removed, one of the fasteners 51 can be loosened and removed from the band fixing hole 41, thereby releasing the corresponding end of the band member 31 and allowing the cover 24 to be removed.

[0064] Reference is made to Figures 9 to 11 which show a second embodiment of a detachable connection of the cover 24. The upper part of Figure 9 shows a first state of the external insulation 2 in the second embodiment, and the lower part shows a second state of the external insulation 2 in the second embodiment.

[0065] 10 , in a second embodiment, an upper portion (e.g., upper portion 22) of the external insulation 2 is provided with a first fixing hole 42 (see, for example, A in FIG. 10 ) adjacent to the second cutout 223. The cover 24 has an extension 241. The extension 241 covers at least the portion of the upper portion 22 where the first fixing hole 42 is provided when the cover 24 is connected to the upper portion 22. The cover 24 is provided with a second fixing hole 242 in the extension 241 that is aligned with the first fixing hole 42 in the upper portion 22. One or both of the first fixing hole 42 and the second fixing hole 242 may be threaded holes.

[0066] Alternatively, it will be understood by those skilled in the art that the upper portion (e.g., upper portion 22) of the external insulation 2 may not have the first fixing hole 42, but the front portion (e.g., front portion 21) of the external insulation 2 may have a band fixing hole adjacent to the first cutout 213, and the extension portion 241 of the cover 24 may cover at least the portion of the front portion 21 that has the band fixing hole and the cover fixing hole aligned with the band fixing hole in the front portion 21.

[0067] 11A and 11C, an upper portion (e.g., upper portion 22) of the external insulation 2 is provided with a first protrusion 225 adjacent to and offset rearward from the first fixing hole 42, and a front portion (e.g., front portion 21) of the external insulation 2 is provided with a second protrusion 215 adjacent to the first cutout 213. The first protrusion 225 may be in the form of a shape that curves rearward, and the second protrusion 215 may have a shape that curves downward.

[0068] In a first state of the second embodiment of the external insulation 2 shown at the top of Figure 9, the cover 24 is removably connected to the top 22 by fasteners 52, such as screws, that are threaded into the aligned first and second fixing holes 42, 242, thereby connecting the top 22 and the cover 24 to one another (see Figure 10A). When it is necessary to remove the cover 24 in the first state, the fasteners 52 can be loosened and removed from the first and second fixing holes 42, 242, thereby releasing the cover 24 from the top 22.

[0069] In the second state of the external insulation 2 of the second embodiment shown in the lower part of FIG. 9 , a band member 32 may be provided. The band member 32 may be similar to the band member 31 of the first embodiment. The band member 32 also has retaining rings at both ends. The band member 32 is elastic, and the length of the band member 32 is slightly shorter than the shortest distance along the outer surface of the cover 24 from the first protrusion 225 of the upper part 22 to the second protrusion 215 of the front part 21. Unlike the first embodiment, the band member 32 is attached (e.g., fastened with a hook) to the first protrusion 225 of the upper part 22 and the second protrusion 215 of the front part 21 by retaining rings, respectively. As a result, the band member 32 is pressed against the cover 24 toward the inside of the external insulation 2, thereby securely connecting the cover 24 to both the front part 21 and the upper part 22. When it is necessary to remove the cover 24 in the second state, the band member 32 can be stretched to disengage one of the retaining rings from the corresponding protrusion, thereby releasing the cover 24 from the front portion 21 and the top portion 22.

[0070] The detachable connection of the cover 24 in the second embodiment allows the cover 24 to be first detachably connected to the top portion 22 in a first state and to the front portion 21 and the top portion 22 in a second state by the band member 32 without the aid of fasteners 52.

[0071] The fastening screws are prone to damage or loss after multiple disassembly during replacement of oil removal cartridges or other repair or maintenance work on the external insulation 2. The detachable connection of the cover 24 of the second embodiment makes it possible to easily connect the cover 24 to the front part 21 and the top part 22 of the external insulation 2 with the help of only the band members 32 and without the need for other special tools after the fastening screws are damaged or lost.

[0072] Reference is made to FIGS. 12-13, which show a third embodiment of a detachable connection of the cover 24. FIG.

[0073] In this embodiment, the cover 24 is connected to the external insulation 2 by a snap connection.

[0074] 13A and 13B, the cover 24 is provided with a resilient snap fastener member 246 adjacent to a first notch 213 in the front portion (e.g., front portion 21) and a second notch 223 in the upper portion (e.g., top portion 22), respectively. The front portion 21 and the top portion 22 are provided with slots 216 and 226 in the first notch 213 and the second notch 223, respectively, that correspond to the snap fastener member 246.

[0075] When connecting the cover 24 to the external insulation 2, the resilient snap fastener members 246 of the cover 24 can be inserted into and engaged with the slots 216 and 226 in the front and top portions 21 and 22, thereby forming a snap connection connecting the cover 24 to the external insulation 2. The resilient snap members 246 provide a resilient force to prevent the snap members 246 from disengaging from their corresponding slots.

[0076] When cover 24 needs to be removed, a force is applied against the elastic force to disengage snap members 246 from slots 216 and 226, thereby allowing release of cover 24 from front portion 21 and top portion 22.

[0077] Reference is made to FIGS. 14-15, which show a third embodiment variant of the detachable connection of the cover 24. FIG.

[0078] In this variant, the cover 24 is also connected to the external insulation 2 by means of a snap connection.

[0079] Unlike the third embodiment, in this modified embodiment, the top 22 is provided with two opposing resilient snap fasteners 227 adjacent to the second notches 223 at positions corresponding to the sides of the cover 24. The cover 24 is provided with two slots 247 corresponding to the snap fasteners 227.

[0080] When the cover 24 is connected to the external insulation 2, the two resilient snap fastener members 227 of the top 22 can be inserted into and engaged with each of the two slots 247 of the cover 24, thereby forming a snap connection connecting the cover 24 to the external insulation 2. The resilient snap fastener members 227 provide a resilient force to prevent the snap fastener members 227 from disengaging from the corresponding slots.

[0081] When it is necessary to remove the cover 24, a force is applied against the elastic force to disengage the snap members 227 on the top 22 from the slots 247 on the cover 24, thereby allowing the cover 24 to be released from the front 21.

[0082] Those skilled in the art will understand that, alternatively, the top portion 22 may not have any snap fasteners 227, and the front portion 21 may have two resilient snap fasteners adjacent to the first notch 213 at positions corresponding to the sides of the cover 24.

[0083] Although the present disclosure has been described above with reference to embodiments, various modifications may be made thereto without departing from the scope of the present disclosure, and some of them may be replaced with equivalents. In particular, unless there is a structural contradiction, the features of the embodiments disclosed herein may be used in any combination with each other, and such combination cases are not exhaustively described herein simply to save space and resources. Therefore, the present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A compressor unit (100) for a vehicle, the compressor unit (100) comprising a positive displacement air compressor, the compressor unit (100) further comprising an external insulation material (2) for preventing condensation of water within the positive displacement air compressor, the external insulation material (2) being provided on at least the surface of a body (1) of the positive displacement air compressor.

2. The compressor unit (100) according to claim 1, characterized in that the external insulation material (2) comprises a protective layer (2-2) and an insulating plate (2-1), the protective layer (2-2) being provided on at least the surface of the body (1) of the positive displacement air compressor, and the insulating plate (2-1) being provided in a gap between the protective layer (2-2) and the body (1) of the positive displacement air compressor.

3. 2. The compressor unit (100) according to claim 1, characterized in that the body (1) of the positive displacement air compressor is mounted at a designated position in the vehicle by the external insulation (2).

4. 2. The compressor unit (100) according to claim 1, characterized in that the external insulation (2) is provided with openings, which are used for one or more of a wiring harness, pneumatic lines, and coolant lines, and / or for fixing the compressor unit.

5. 2. The compressor unit (100) of claim 1, wherein the external insulation (2) of the positive displacement air compressor is split to facilitate maintenance and repair of components of the positive displacement air compressor.

6. 6. The compressor unit (100) of claim 5, wherein the external insulation (2) comprises a plurality of separately formed sections, the plurality of sections being detachably connected to one another to cover the surface of the body (1) of the positive displacement air compressor.

7. 7. The compressor unit (100) of claim 6, wherein the plurality of portions include a front portion (21) that covers a front end of the body (1) of the positive displacement air compressor, an upper portion (22) that covers the top and sides of the body (1) of the positive displacement air compressor, and a lower portion (23) that covers the bottom of the body (1) of the positive displacement air compressor, and the front portion, the upper portion, and the lower portion are formed separately.

8. 6. The compressor unit (100) according to claim 5, wherein the external insulation (2) is provided with an opening (25) that exposes an oil removal cartridge (15) of the positive displacement air compressor, and the external insulation (2) further comprises a cover (24) adapted to removably cover the opening (25).

9. The compressor unit (100) according to claim 8, wherein the cover (24) detachably covers the opening (25) with a band member (31).

10. 10. The compressor unit (100) of claim 9, wherein the external insulation (2) has a first band fixing hole (41) adjacent to one side of the opening (25) and sandwiching the opening (25), and a second band fixing hole (41) on the opposite side of the opening (25), and fasteners (51) pass through retaining rings (311) on both ends of the band member (31) aligned with the first band fixing hole (41) and the second band fixing hole (41), respectively, so that the cover (24) detachably covers the opening (25).

11. 9. The compressor unit (100) according to claim 8, wherein the cover (24) removably covers the opening (25) by means of fasteners (52), the fasteners (52) passing through first fixing holes (42) in the external insulation (2) and second fixing holes (242) in the cover (24).

12. The compressor unit (100) according to claim 11, characterized in that the external insulation (2) is provided with a first protrusion (225) adjacent to one side of the opening (25) and sandwiching the opening (25), and a second protrusion (215) on the opposite side of the opening (25), and the cover (24) detachably covers the opening (25) by attaching retaining rings at both ends of a band member (32) to the first protrusion (225) and the second protrusion (215).

13. 9. The compressor unit (100) according to claim 8, characterized in that the cover (24) removably covers the opening (25) by means of a snap connection.

14. 14. The compressor unit (100) according to claim 13, wherein the snap connection comprises elastic snap members (246) provided on the cover (24) and slots (216, 226) provided on the external insulation (2), and the elastic snap members (246) of the cover (24) engage with the slots (216, 226) of the external insulation (2), thereby causing the cover (24) to detachably cover the opening (25).

15. 14. The compressor unit (100) according to claim 13, characterized in that the snap connection comprises an elastic snap member (227) provided on the external insulation (2) and a slot (247) provided on the cover (24), the elastic snap member (227) of the external insulation (2) engaging with the slot (247) of the cover (24), whereby the cover (24) removably covers the opening (25).

16. The compressor unit (100) according to any one of claims 1 to 15, characterized in that the compressor unit (100) further comprises a drive means (50) for driving the positive displacement air compressor.

17. A vehicle, characterized in that said vehicle is fitted with a compressor unit (100) according to any one of claims 1 to 16.

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