hinged cooler

Abstract

The hinged cooler includes a housing into which a cooling fluid flows, a first heat exchanger disposed inside the housing for cooling a first fluid with the cooling fluid, a second heat exchanger disposed inside the housing for cooling a second fluid with the cooling fluid, and a hinge disposed between the first and second heat exchangers. The first heat exchanger rotates about the hinge in a first direction from a first closed position covering the housing to a first open position in which the first heat exchanger moves outside the housing. The second heat exchanger rotates about the hinge in a second direction opposite to the first direction from a second closed position covering the housing to a second open position in which the second heat exchanger moves outside the housing.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application is based on and claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 416,893, filed October 17, 2022, the disclosure of which is incorporated herein by reference in its entirety for all purposes.

[0003] The present disclosure relates generally to hinged coolers, and more particularly to hinged coolers integrated into portable air compressors. Related technologies

[0004] In the related art, cleanout panels are provided within the fan shroud to facilitate some access for cleaning the heat exchangers of the compressor package, with having the cleanout panels being preferable to no access to the exchangers at all.

[0005] However, challenges arise during cleanup due to debris falling to the bottom of the fan shroud area and the subsequent wash water from the pressure wash. It is also difficult to maneuver a washing wand within the fan shroud to be effective in cleaning the heat exchanger.

[0006] Therefore, there is an unmet need for an arrangement for easy and effective cleaning of the heat exchanger of an air compressor.

[0007] The present invention is directed to a hinged cooler for air compressors that solves the problems of conventional systems by providing access to both sides of the heat exchanger for inspection and cleaning, improving both the quality of cleaning and the time it takes to complete cleaning. Summary

[0008] The subject invention is a hinged cooler for compressors, particularly portable compressor units.

[0009] This concept is unique in that the air heat exchanger is hinged to allow it to swing outward from the envelope of the compressor system to be cleaned. The system generally includes four main bodies including the oil cooler, the aftercooler, the hinges and the framework that bolts all of these together and holds the system within the compressor assembly.

[0010] An aspect of the present disclosure includes a hinged cooler including a housing into which a cooling fluid flows, a first heat exchanger disposed within the housing for cooling the first fluid with the cooling fluid, a second heat exchanger disposed within the housing for cooling a second fluid with the cooling fluid, and a hinge located between the first heat exchanger and the second heat exchanger.

[0011] The first heat exchanger rotates about the hinge in a first direction from a first closed position covering the housing to a first open position where the first heat exchanger moves outside the housing, and the second heat exchanger rotates about the hinge in a second direction opposite to the first direction from a second closed position covering the housing to a second open position where the second heat exchanger moves outside the housing.

[0012] Aspects of the present disclosure further include a compressor system including a compressor, a fan that supplies cooling air, a housing into which the cooling air flows, an oil heat exchanger disposed inside the housing to cool oil in the compressor with the cooling air, an aftercooler heat exchanger disposed inside the housing to cool compressed air in the compressor with the cooling air, and a hinge located between the oil heat exchanger and the aftercooler heat exchanger.

[0013] The oil heat exchanger rotates about the hinge in a first direction from a first closed position covering the housing to a first open position where the oil heat exchanger moves outside the housing, and the aftercooler heat exchanger rotates about the hinge in a second direction opposite to the first direction from a second closed position covering the housing to a second open position where the aftercooler heat exchanger moves outside the housing.

[0014] Aspects of the present disclosure further include a hinged cooling means including a housing into which a cooling fluid flows, a first heat exchange means disposed inside the housing for cooling a first fluid with the cooling fluid, a second heat exchange means disposed inside the housing for cooling a second fluid with the cooling fluid, and a hinge means located between the first heat exchange means and the second heat exchange means.

[0015] The first heat exchange means rotates about the hinge means in a first direction from a first closed position covering the housing to a first open position where the first heat exchange means moves to the outside of the housing, and the second heat exchange means rotates about the hinge means in a second direction opposite to the first direction from a second closed position covering the housing to a second open position where the second heat exchange means moves to the outside of the housing.

[0016] In an exemplary aspect of the present disclosure, a hinged cooler may be provided to solve cumbersome access to clean the heat exchanger by swinging the heat exchanger outside the machine envelope for easy access for cleaning and maintenance. [Brief explanation of the drawings]

[0017] A general architecture for implementing various features of the present disclosure will now be described with reference to the drawings. The drawings and associated description are provided to illustrate example implementations of the present disclosure and are not intended to limit the scope of the disclosure. Reference numbers are re-used throughout the drawings to indicate correspondence between referenced elements. [Figure 1] 1A and 1B show an example hinged cooler for an air compressor in a cooler-closed position and a cooler-open position, respectively, according to an example implementation. [Figure 2] FIG. 2 shows an illustrative diagram of a compressor system with a hinged cooler, according to an example implementation. [Figure 3] FIG. 3 shows an illustrative diagram of a hinged cooler comprising a cooler and a hinge according to an example implementation. [Figure 4] FIG. 4 illustrates an example of a cross-sectional view of a hinged cooler with a fan of a compressor system, according to an example implementation. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following detailed description provides further details of the figures and exemplary implementations of the present application. Reference numbers and descriptions of elements that are duplicated between figures are omitted for clarity. Terms used throughout the description are provided by way of example and are not intended to be limiting. For example, the use of the term "automatic" may include a fully automatic implementation or a semi-automatic implementation with user or operator control over certain aspects of the implementation, depending on the desired implementation of one skilled in the art practicing the implementation of the present application. Furthermore, sequential terms such as "first," "second," and "third" may be used in the specification and claims merely for labeling purposes and should not be limited to indicating that the described acts or items occur in the order described. Acts or items may be arranged in different orders or performed in parallel or dynamically without departing from the scope of the present disclosure.

[0019] Example implementations described herein include a hinged cooler for a compressor system that may provide a solution for managing the efficient cleaning and repair of the compressor system's aftercooler heat exchanger and oil heat exchanger.

[0020] In some applications, the compressed air supplied by the compressor needs to be cooled to a desired temperature by an aftercooler before being delivered to the end user.

[0021] Additionally, the circulating oil in the air compressor needs to be cooled by an oil heat exchanger before being returned to the compressor in a closed oil cycle.

[0022] Both the aftercooler heat exchanger and the oil heat exchanger may be positioned side by side within the housing to share an air cooling fluid for cooling the compressed air and oil, respectively.

[0023] Such a design may be applied to portable machines that require periodic cleaning of the air compressor package, primarily the heat exchanger (cooler), since the heat exchanger (cooler) is typically located externally in a harsh environment with dust and debris.

[0024] Other applications are for any vehicle or portable or stationary equipment having a cooling system with a heat exchanger that requires periodic cleaning, such as generators, refrigerators, air compressors, pumps, compactors, earth moving equipment, loaders, bulldozers, skid steers, graders, excavators, on-highway trucks, recreational vehicles, commercial vehicles, cars and trucks, etc.

[0025] The hinged cooler concept may also be used on portable electric air compressors, where the hinged cooler is part of the cooling system within the air compressor package.

[0026] 1A shows an exemplary hinged cooler 1 for an air compressor in the cooler closed position. The system shows the oil heat exchanger 10 and aftercooler heat exchanger 11 at the rear of the compressor system with the compressor system door open, exposing the hinged cooler with hinge 12 located between the oil heat exchanger 10 and aftercooler heat exchanger 11.

[0027] 1B shows an exemplary hinged cooler 1 for an air compressor in the cooler open position. The system shows the oil heat exchanger 10 and aftercooler heat exchanger 11 at the rear of the compressor system with the compressor system door open, exposing the hinged cooler with hinge 12 located between the oil heat exchanger 10 and aftercooler heat exchanger 11. The hinged mechanism allows the oil heat exchanger 10 and aftercooler heat exchanger 11 to swing outward for access for cleaning purposes in the cooler open position, and then close and return to the cooler closed position shown in FIG. 1A when cleaning is complete.

[0028] FIG. 2 shows an illustrative diagram of a compressor system 2 with the hinged cooler 1 shown in FIGS. 1A and 1B incorporated therein, according to an exemplary implementation.

[0029] A hinge 12 is provided between the oil heat exchanger 10 and the aftercooler heat exchanger 11 to facilitate rotation of each heat exchanger 10 and 11 towards the other one of the heat exchangers 10 and 11.

[0030] A fan 14 supplies cooling air into the housing 13 as a cooling fluid for the oil heat exchanger 10 and the aftercooler heat exchanger 11 .

[0031] Compressed air supplied by compressor 15 passes through aftercooler heat exchanger 11 for cooling before exiting compressor system 2 for delivery to an end user.

[0032] Oil leaving the compressor 15 flows in a closed cycle through an oil heat exchanger 10 where it is cooled by cooling air supplied by a fan 14 before returning to the compressor 15 .

[0033] A removable frame 16 provides support for securing the oil heat exchanger 10 and the aftercooler heat exchanger 11 within the housing 13 .

[0034] FIG. 3 shows an illustrative view of an oil heat exchanger 10, an aftercooler heat exchanger 11, and a hinge 12 disposed between the heat exchangers 10 and 11, according to an exemplary implementation.

[0035] The hinges 12 include a first hinge attached to the oil heat exchanger 10 that provides rotation of the oil heat exchanger 10 towards the aftercooler heat exchanger 11 .

[0036] Additionally, the hinge 12 includes a second hinge attached to the aftercooler heat exchanger 11 that provides for rotation of the aftercooler heat exchanger 11 towards the oil heat exchanger 10 .

[0037] Bolts 17 are provided near the frame 16 on the opposite side of the oil heat exchanger 10 and the aftercooler heat exchanger 11 to facilitate fastening the heat exchangers 10 and 11 to the housing 13 and rotating the heat exchangers 10 and 11 from the housing 13 when the bolts 17 are removed.

[0038] FIG. 4 shows an example of a cross-sectional view of a hinged cooler 1 with a fan 14 of a compressor system according to an exemplary implementation.

[0039] The oil heat exchanger 10 and the aftercooler heat exchanger 11 share the same cooling air flow supplied by a fan 14 to cool the oil and air passing through the oil heat exchanger 10 and the aftercooler heat exchanger 11, respectively.

[0040] The fan 14 is located on the opposite side of the housing 13 from the oil heat exchanger 10 and the aftercooler heat exchanger 11 so that the cooling air flows through the housing 13 before entering the oil heat exchanger 10 and the aftercooler heat exchanger 11.

[0041] The hinge 12 protrudes in the width direction of the housing 13 from the housing 13 to the outside of the housing 13 .

[0042] Based on the above configuration, an exemplary embodiment of the present invention relates to a hinged cooler 1 shown in FIGS. 1A, 1B and 2.

[0043] The hinged cooler 1 includes a housing 13 into which a cooling fluid flows, a first heat exchanger 10 arranged inside the housing 13 to cool the first fluid with the cooling fluid, a second heat exchanger 11 arranged inside the housing 13 to cool the second fluid with the cooling fluid, and a hinge 12 located between the first heat exchanger 10 and the second heat exchanger 11.

[0044] As shown in Figures 1A and 1B, the first heat exchanger 10 rotates in a first direction about the hinge 12 from a first closed position covering the housing 13 to a first open position in which the first heat exchanger 10 moves outside the housing 13.

[0045] Furthermore, the second heat exchanger 11 rotates about the hinge 12 in a second direction opposite to the first direction from a second closed position in which it covers the housing 13 to a second open position in which the second heat exchanger 11 moves outside the housing.

[0046] As shown in FIG. 2, the hinged cooler 1 further includes a removable frame 16 that is attached to the side of the first heat exchanger 10 and the second heat exchanger 11 opposite the side of the first heat exchanger 10 and the second heat exchanger 11 that is located adjacent to the hinge 12.

[0047] As shown in FIG. 3, a removable frame 16 is attached to opposite sides of the first heat exchanger 10 and the second heat exchanger 11 by a plurality of bolts 17 that are removable for rotation of the first heat exchanger 10 and the second heat exchanger 11 about the hinges 12.

[0048] As shown in FIG. 3, the hinge 12 includes a first hinge attached to a side surface of the first heat exchanger 10 and a second hinge attached to a side surface of the second heat exchanger 11.

[0049] The first hinge and the second hinge are located side by side between the first heat exchanger 10 and the second heat exchanger 11 .

[0050] As shown in FIG. 4, the hinged cooler 1 further includes a fan 14 arranged on the side of the housing 13 opposite to the side of the housing 13 on which the first heat exchanger 10 and the second heat exchanger 11 are arranged.

[0051] The fan 14 supplies cooling fluid to the housing 13 to cool the first fluid flowing inside the first heat exchanger 10 and the second fluid flowing inside the second heat exchanger 11 .

[0052] As shown in FIG. 2, the first fluid may include oil that has passed through the compressor 15, and the second fluid may include air that is compressed within the compressor 15.

[0053] Compressor 15 may include a portable electric compressor.

[0054] As shown in FIG. 1B, after the first heat exchanger 10 and the second heat exchanger 11 rotate around the hinge 13, the interior of the housing 13 is exposed to the outside, so that the entire first heat exchanger 10 and the entire second heat exchanger 11 move outside the housing 13.

[0055] The first heat exchanger 10 rotates forward about a hinge 12 towards the second heat exchanger 11 from a first closed position shown in FIG. 1A to a first open position shown in FIG. 1B.

[0056] The first heat exchanger 10 rotates rearward about hinge 12 away from the second heat exchanger 11 from a first open position shown in Figure 1B to a first closed position shown in Figure 1A.

[0057] The second heat exchanger 11 rotates forward about hinge 12 towards the first heat exchanger 10 from a second closed position shown in FIG. 1A to a second open position shown in FIG. 1B.

[0058] The second heat exchanger 11 rotates rearward about hinge 12 away from the first heat exchanger 10 from a second open position shown in Figure 1B to a second closed position shown in Figure 1A.

[0059] In the first closed position and the second closed position shown in FIG. 2, the outer surfaces of the first heat exchanger 10 and the second heat exchanger 11 exposed to the outside of the housing 13 are positioned side by side in the longitudinal direction of the housing 13.

[0060] The hinge 12 protrudes in the width direction of the housing 13 from the housing 13 to the outside of the housing 13 .

[0061] Another exemplary embodiment of the present invention is directed to a compressor system 2 shown in FIG.

[0062] The compressor system 2 includes a compressor 15, a fan 14 that supplies cooling air, a housing 13 into which the cooling air flows, an oil heat exchanger 10 arranged inside the housing 13 to cool the oil in the compressor 15 with the cooling air, an after-cooler heat exchanger 11 arranged inside the housing 13 to cool the compressed air in the compressor 15 with the cooling air, and a hinge 12 located between the oil heat exchanger 10 and the after-cooler heat exchanger 11.

[0063] The oil heat exchanger 10 rotates in a first direction about the hinge 12 from a first closed position covering the housing 13 to a first open position in which the oil heat exchanger 10 moves outside the housing 13, as shown in Figures 1A and 1B.

[0064] The after-cooler heat exchanger 11 rotates about the hinge 12 in a second direction opposite to the first direction from a second closed position in which it covers the housing 13 as shown in FIG. 1A to a second open position in which the after-cooler heat exchanger 11 moves outside the housing 13 as shown in FIG. 1B.

[0065] As shown in FIG. 3 , the compressor system 2 further includes a removable frame 16 that is attached to the side of the oil heat exchanger 10 and the aftercooler heat exchanger 11 opposite the side of the oil heat exchanger 10 and the aftercooler heat exchanger 11 that is located adjacent to the hinge 12.

[0066] A removable frame 16 is attached to the opposite side of the oil heat exchanger 10 and the aftercooler heat exchanger 11 by a plurality of bolts 17 which are removable for rotation of the oil heat exchanger 10 and the aftercooler heat exchanger 11 about the hinges 12.

[0067] The hinge 12 shown in FIG. 3 includes a first hinge attached to the side of the oil heat exchanger 10 and a second hinge attached to the side of the aftercooler heat exchanger 11 .

[0068] The first hinge and the second hinge are located side by side between the oil heat exchanger 10 and the aftercooler heat exchanger 11 .

[0069] The compressor 15 shown in FIG. 3 may include a portable electric compressor.

[0070] As shown in FIG. 3, after the oil heat exchanger 10 and the after-cooler heat exchanger 11 rotate around the hinge 12, the inside of the housing 13 is exposed to the outside, so that the entire oil heat exchanger 10 and the after-cooler heat exchanger 11 move outside the housing 13.

[0071] As shown in Figures 1A and 1B, the oil heat exchanger 10 rotates forward about hinge 12 towards the aftercooler heat exchanger 11 from a first closed position to a first open position.

[0072] The oil heat exchanger 10 rotates rearward about hinge 12 away from the aftercooler heat exchanger 11 from a first open position to a first closed position.

[0073] The aftercooler heat exchanger 11 rotates forward about hinge 12 towards the oil heat exchanger 10 from a second closed position to a second open position.

[0074] The aftercooler heat exchanger 11 rotates rearward about hinge 12 away from the oil heat exchanger 10 from the second open position to the second closed position.

[0075] As shown in FIG. 2, in the first closed position and the second closed position, the outer surfaces of the oil heat exchanger 10 and the aftercooler heat exchanger 11 exposed to the outside of the housing 13 are positioned side by side in the longitudinal direction of the housing 13.

[0076] The hinge 12 protrudes in the width direction of the housing 13 from the housing 13 to the outside of the housing 13 .

[0077] Based on the exemplary embodiment described above, by hingedly connecting the heat exchanger and allowing space for the heat exchanger to swing outward from the machine package envelope, sufficient access is provided for cleaning the heat exchanger without pressure washer cleaning spray and debris falling into the machine frame.

[0078] Additionally, cleaning spray and debris fall outside the machine package and can be easily contained and properly disposed of. After cleaning, the heat exchanger can be easily returned to its operating position. This improves the quality of cleaning by providing full access to both sides of the heat exchanger during cleaning. It also improves the overall time required to complete cleaning by allowing the exchanger to be easily swung from the operating position to the cleaning position and back to the operating position.

[0079] Additionally, the centrally located hinge is noteworthy. With the cooler attached to the hinge, the hinge and the joint where the hinge is bolted are subjected to significant forces when opened. This force is transmitted through the bolted structure. This design, where the centrally located hinged framework is substantially rigid, was considered a new and superior solution to other hinge locations, such as end-most hinges, for swinging the cooler outward, which would require substantial structure on both sides, duplicating the structure and increasing complexity, weight, and cost.

[0080] Another unique aspect of the present invention is that the compressor package is a portable electric compressor, as opposed to a stationary electric compressor or a portable diesel compressor. As a portable electric compressor, the cooling system is simplified compared to a portable diesel compressor in that there is no engine radiator or charge air cooler, only a compressor oil cooler and aftercooler are required.

[0081] Swinging two coolers out is much simpler than swinging an additional cooler out, which is required for diesel-powered machines. With regard to stationary electric compressors, stationary electric compressors are typically installed inside a building that has a generally cleaner atmosphere than the atmosphere for portable compressors, which are typically located in dirtier environments such as outdoor petrochemical plants or construction sites.

[0082] While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description of the specific embodiments herein is not intended to limit the invention to the particular forms disclosed.

[0083] The foregoing detailed description describes various exemplary implementations of devices and / or processes using diagrams, schematics, and examples. To the extent that such diagrams, schematics, and examples include one or more functions and / or operations, each function and / or operation in such diagrams or examples may be individually and / or collectively performed by a wide variety of structures. While specific exemplary implementations have been described, these implementations are presented merely as examples and are not intended to limit the scope of protection. Indeed, the novel methods and devices described herein may be embodied in a variety of other forms. Furthermore, various omissions, substitutions, and changes may be made in the form of the devices and systems described herein without departing from the spirit of protection. The appended claims and their equivalents are intended to cover such forms or modifications that fall within the scope and spirit of protection.

Claims

1. a housing into which a cooling fluid flows; a first heat exchanger disposed within the housing for cooling a first fluid with the cooling fluid; a second heat exchanger disposed within the housing for cooling a second fluid with the cooling fluid; a hinge located between the first heat exchanger and the second heat exchanger; Including, the first heat exchanger rotates about the hinge in a first direction from a first closed position covering the housing to a first open position in which the first heat exchanger moves outside the housing; the second heat exchanger rotates about the hinge in a second direction opposite to the first direction from a second closed position covering the housing to a second open position in which the second heat exchanger moves to the outside of the housing; Hinged cooler.

2. a removable frame attached to a side of the first heat exchanger and the second heat exchanger opposite a side of the first heat exchanger and the second heat exchanger located adjacent the hinge; The hinged cooler of claim 1 further comprising:

3. the removable frame is attached to the opposing sides of the first and second heat exchangers by a plurality of bolts that are removable for rotation of the first and second heat exchangers about the hinges; 3. The hinged cooler of claim 2.

4. The hinge is a first hinge attached to a side surface of the first heat exchanger; a second hinge attached to a side of the second heat exchanger; Including, the first hinge and the second hinge are positioned side by side between the first heat exchanger and the second heat exchanger; 10. The hinged cooler of claim 1.

5. a fan disposed on a side of the housing opposite to a side of the housing on which the first heat exchanger and the second heat exchanger are disposed; Further comprising: the fan supplies the cooling fluid to the housing to cool the first fluid flowing inside the first heat exchanger and the second fluid flowing inside the second heat exchanger; 10. The hinged cooler of claim 1.

6. The first fluid includes oil that has passed through a compressor, and the second fluid includes air that is compressed in the compressor.

6. The hinged cooler of claim 5.

7. The compressor includes a portable electric compressor.

7. The hinged cooler of claim 6.

8. After the first heat exchanger and the second heat exchanger rotate around the hinge, the interior of the housing is exposed to the outside, such that the entire first heat exchanger and the entire second heat exchanger move to the outside of the housing.

10. The hinged cooler of claim 1.

9. the first heat exchanger rotates forward about the hinge toward the second heat exchanger from the first closed position to the first open position; the first heat exchanger rotates rearward about the hinge away from the second heat exchanger from the first open position to the first closed position; 10. The hinged cooler of claim 1.

10. the second heat exchanger rotates forward about the hinge toward the first heat exchanger from the second closed position to the second open position; the second heat exchanger rotates rearward about the hinge away from the first heat exchanger from the second open position to the second closed position.

10. The hinged cooler of claim 9.

11. In the first closed position and the second closed position, outer surfaces of the first heat exchanger and the second heat exchanger exposed to the outside of the housing are positioned side by side in a longitudinal direction of the housing, The hinge protrudes from the housing to the outside of the housing in a width direction of the housing.

10. The hinged cooler of claim 1.

12. A compressor; a fan for supplying cooling air; a housing into which the cooling air flows; an oil heat exchanger disposed inside the housing for cooling oil in the compressor with the cooling air; an aftercooler heat exchanger disposed inside the housing for cooling the compressed air of the compressor with the cooling air; a hinge located between the oil heat exchanger and the aftercooler heat exchanger; Including, the oil heat exchanger rotates about the hinge in a first direction from a first closed position covering the housing to a first open position in which the oil heat exchanger moves outside the housing; the aftercooler heat exchanger rotates about the hinge in a second direction opposite to the first direction from a second closed position covering the housing to a second open position in which the aftercooler heat exchanger moves to the outside of the housing; Compressor system.

13. a removable frame attached to a side of the oil heat exchanger and the aftercooler heat exchanger opposite to a side of the oil heat exchanger and the aftercooler heat exchanger located adjacent the hinge; The compressor system of claim 12 further comprising:

14. the removable frame is attached to the opposite sides of the oil heat exchanger and the aftercooler heat exchanger by a plurality of bolts that are removable for rotation of the oil heat exchanger and the aftercooler heat exchanger about the hinges; The compressor system of claim 13.

15. The hinge is a first hinge attached to a side surface of the oil heat exchanger; a second hinge attached to a side of the aftercooler heat exchanger; Including, the first hinge and the second hinge are positioned side by side between the oil heat exchanger and the aftercooler heat exchanger; The compressor system of claim 12.

16. The compressor includes a portable electric compressor. The compressor system of claim 12.

17. After the oil heat exchanger and the aftercooler heat exchanger rotate around the hinge, the interior of the housing is exposed to the outside so that the entire oil heat exchanger and the aftercooler heat exchanger move to the outside of the housing. The compressor system of claim 12.

18. the oil heat exchanger rotates forward about the hinge toward the aftercooler heat exchanger from the first closed position to the first open position; the oil heat exchanger rotates rearward about the hinge away from the aftercooler heat exchanger from the first open position to the first closed position; The compressor system of claim 12.

19. the aftercooler heat exchanger rotates forward about the hinge toward the oil heat exchanger from the second closed position to the second open position; the aftercooler heat exchanger rotates rearward about the hinge away from the oil heat exchanger from the second open position to the second closed position.

20. The compressor system of claim 18.

20. In the first closed position and the second closed position, outer surfaces of the oil heat exchanger and the aftercooler heat exchanger exposed to the outside of the housing are positioned side by side in the length direction of the housing, The hinge protrudes from the housing to the outside of the housing in a width direction of the housing. The compressor system of claim 12.

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