Head module for air compressor and air compressor comprising same

Abstract

The invention discloses a head module for an air compressor and an air compressor including the same, which can completely prevent foreign matters from flowing into a stroke space for accommodating a crankshaft and a piston assembly from the outside, and can minimize noise flowing out of the stroke space to the outside. The head module for an air compressor includes: a crankshaft that receives power from the outside and rotates; a piston assembly including a connecting rod coupled to the crankshaft and a piston reciprocating by means of the connecting rod; the crankshaft is accommodated in the crank body; the air cylinder assembly is combined with the crank body, and a piston is arranged in the air cylinder assembly; a valve unit housed in the cylinder assembly and configured to be opened and closed in accordance with the reciprocating motion of the piston; a filter coupled to the cylinder assembly and filtering air flowing into the cylinder assembly; and a cooling fan coupled to the crankshaft and disposed at an end portion of the crank body, the cooling fan causing unfiltered air to flow into the crank body while rotating by means of the crankshaft.

Description

Technical Field

[0001] The present invention relates to a head module for an air compressor and an air compressor including the same, and more specifically, to a medical oil-free air compressor. Background Technology

[0002] Generally, air compressors are classified into two types: positive displacement and power.

[0003] A representative example of a positive displacement compressor is the reciprocating piston compressor, which consists of a cycle in which air is drawn in, compressed, and discharged based on the opening and closing of a valve according to the reciprocating motion of the piston in the cylinder.

[0004] A positive displacement compressor is a device that makes a rotary car rotate at a very high speed, and the pressure of the gas is increased by the amount of motion caused by the large flow velocity obtained at this time. It is often used when a large flow rate is required.

[0005] This type can be further divided into centrifugal and axial types. In addition, there are various other forms, such as screw compressors that compress gas in the space between two meshing screws by rotation, and scroll compressors that compress gas between two spiral grooves by rotation.

[0006] Air compressors are classified into oil-supply compressors and oil-free compressors.

[0007] Oil-fed compressors use oil in the cylinder to prevent frictional heat between the piston and cylinder. This design generates heat during the piston's reciprocating motion, causing the internal oil to vaporize. Since this design does not prevent the vaporized oil from being trapped, it mixes with compressed air and is discharged. Therefore, oil-fed compressors are unsuitable for medical applications and are primarily used in industrial settings.

[0008] Oil-free compressors do not use oil at all; instead, they utilize bearings and other components to move a piston. Therefore, oil-free compressors produce clean air that is free of oil in the exhaust. Consequently, oil-free compressors are commonly used in medical applications.

[0009] Because existing oil-free compressors compress air by allowing unfiltered outside air to flow into the compressor, there is a risk that foreign objects may enter the compressor along with the outside air, causing them to accumulate on the crankshaft and piston. This can lead to wear on the crankshaft and piston, resulting in foreign objects in the compressed air, or the crankshaft and piston not being able to drive accurately.

[0010] In addition, in existing oil-free compressors, the crankcase that houses the crankshaft and the cylinder block that houses the piston are single-walled structures, and the intake / exhaust valves that allow air to flow into the outside and exhaust compressed air are configured to be exposed to the outside. Therefore, there are problems with the working noise of the crankshaft and piston, as well as the noise generated in the valves when air flows in and out, being directly transmitted to the outside.

[0011] Furthermore, in existing oil-free compressors, the crankshaft is configured to be completely exposed inside the crankcase. Therefore, the crankshaft is directly exposed to the external air flowing into the motor when it is driven, in order to prevent the motor from overheating.

[0012] However, in this case, there is a problem that foreign objects contained in the outside air may adhere to the crankshaft or flow into the cylinder and damage the crankshaft and piston, or be discharged with the compressed air.

[0013] In addition, existing oil-free compressors are formed as tubular structures with a closed crankcase.

[0014] Therefore, in the prior art, when assembling the device, the crankcase is first attached to the motor, and then the crankshaft, connecting rod and piston are assembled inside the crankcase.

[0015] Conversely, in the disassembly process, the crankshaft, connecting rod, and piston are first disassembled inside the crankcase, and then the crankcase is finally disassembled from the motor.

[0016] However, in this case, because the components need to be disassembled or assembled inside the enclosed crankcase, there are problems such as reduced workability, inability to assemble precisely, and longer operation time.

[0017] Prior technology documents

[0018] Patent documents

[0019] (Patent Document 1) Korean Patent Publication No. 10-2021-0074884 Summary of the Invention

[0020] The problem that the invention aims to solve

[0021] The present invention is proposed to solve the problems described above, and its object is to provide a head module for an air compressor and an air compressor including the head module, which can completely prevent foreign objects from flowing into the stroke space containing the crankshaft and piston assembly from the outside.

[0022] Another object of the present invention is to provide a head module for an air compressor and an air compressor including the thereof, which can minimize the noise flowing out of the stroke space.

[0023] Another object of the present invention is to provide a head module for an air compressor and an air compressor including the same, wherein, with the piston and crankshaft engaged with a drive motor, the crankcase can be detachably engaged with the outside of the piston and crankshaft.

[0024] Another object of the present invention is to provide a head module for an air compressor and an air compressor including the same, which can maximize cooling performance through forced air circulation and direct heat dissipation.

[0025] The subject matter of this invention is not limited to the subject matter mentioned above, and those skilled in the art can clearly understand other subject matters not mentioned from the following description.

[0026] means for solving problems

[0027] To address the aforementioned problems, an embodiment of the present invention provides a head module for an air compressor, comprising: a crankshaft, which receives power from an external source and rotates; a piston assembly, which includes a connecting rod coupled to the crankshaft and a piston reciprocating by means of the connecting rod; a crank body, which houses the crankshaft; a cylinder assembly, which is coupled to and communicates with the crank body, and the piston is disposed inside the cylinder assembly; a valve unit, which is housed in the cylinder assembly and configured to open and close with the reciprocating motion of the piston; a filter, which is coupled to the cylinder assembly and filters air flowing into the cylinder assembly; and a cooling fan, which is coupled to the crankshaft and disposed within the cylinder assembly. The crank body, at its end, allows unfiltered air to flow into its interior while rotating via the crankshaft; wherein the crank body includes: a first stroke space accommodating the crankshaft and allowing filtered air from the cylinder assembly to flow in; and a first heat dissipation space isolated from the first stroke space and allowing unfiltered air flowing in via the cooling fan; the cylinder assembly includes: a second stroke space communicating with the first stroke space and accommodating the piston and the valve unit; and a second heat dissipation space isolated from the second stroke space and communicating with the first heat dissipation space, allowing unfiltered air passing through the first heat dissipation space to flow and be discharged to the outside.

[0028] The crankshaft body may include: an inner shell, which is tubular and has a first stroke space formed inside, and an inner connecting hole formed on its outer surface to connect the first stroke space and the second stroke space; a foreign flow prevention cover, which is attached to the end of the inner shell, closes the end of the inner shell, and supports the crankshaft; an outer shell, which is tubular and surrounds the outer periphery of the inner shell, has a first heat dissipation space formed inside, and has a mounting seat formed on its outer surface to connect the first heat dissipation space and the second heat dissipation space and to connect the cylinder assembly, one end of the outer shell being closed by the inner shell; and a fan shroud, which is attached to the other end of the outer shell, protects the cooling fan configured inside the outer shell from external influences, and has a spiral grille inside the fan shroud to convert unfiltered air flowing into the first heat dissipation space into a straight-flowing airflow; the cylinder assembly may include: a cylinder liner, the cylinder liner... The cylinder body is connected to the first stroke space and disposed below the valve unit, with the piston slidably disposed inside, forming a second stroke space between the piston and the valve unit; a cylinder body, part of which is connected to the inner connecting hole and surrounds the cylinder liner, and another part is connected to the upper end of the mounting base with one side surface exposed to the outside, and a first heat dissipation hole communicating with the first heat dissipation space is formed inside; and a cylinder head, which is connected to the upper end of the cylinder body to fix the valve unit, and a second heat dissipation hole communicating with the first heat dissipation hole is formed inside; moreover, unfiltered air flowing into the interior of the housing by means of the cooling fan can discharge heat emitted from the inner housing and the cylinder liner to the outside while passing through the first heat dissipation space, the first heat dissipation hole and the second heat dissipation hole in sequence, and the cylinder body can be formed of a metal material that directly releases heat conducted from the cylinder liner to the outside.

[0029] The valve unit may include: a valve body disposed between the cylinder liner and the cylinder head, having at least one flow path formed internally; a discharge valve coupled to the valve body and configured such that: if the piston moves upward within the cylinder liner, the at least one flow path is opened by pressure; and if the piston moves downward within the cylinder liner, the flow path is closed by suction; and an intake valve coupled to the piston and configured such that: if the piston moves upward within the cylinder liner, at least one air supply port formed on the piston is closed by pressure; and if the piston moves downward within the cylinder liner, the at least one air supply port is opened by suction. The discharge valve may include: a discharge support bolt member, the discharge support bolt member including a discharge bolt body connected to the center of the valve body and a discharge bolt head disposed at the upper end of the discharge bolt body; a discharge valve disc, the discharge valve disc disposed between the discharge bolt head and the valve body, wherein if the piston moves downward, the discharge valve disc is supported on the valve body to close at least one flow path, and if the piston moves upward, the discharge valve disc rises axially along the discharge bolt body to open at least one flow path; and a discharge movement limiting disc, the discharge movement limiting disc being coupled to the discharge bolt body and disposed on the upper part of the discharge valve disc, wherein if the discharge valve disc... If the piston moves upward, the discharge movement limiting disc contacts the top of the discharge valve disc to restrict its movement; and a discharge disc support member, which is coupled to the outer surface of the discharge bolt body and supports the lower surface of the discharge movement limiting disc along the axial direction of the discharge bolt body to fix the discharge movement limiting disc; the intake valve may include: an intake support bolt member, which includes an intake bolt body connected to the center of the upper end of the piston and an intake bolt head disposed at the upper end of the intake bolt body; and an intake valve disc, which is disposed between the intake bolt head and the piston, and if the piston moves upward, the intake valve disc... Supported above the piston to close at least one air supply port, if the piston moves downward, the intake valve disc rises axially along the intake bolt body to open the at least one air supply port; an intake movement limiting disc, which is coupled to the intake bolt body and disposed on the upper part of the intake valve disc, if the intake valve disc rises, the intake movement limiting disc contacts the upper part of the intake valve disc to limit the movement of the intake valve disc; and an intake disc support member, which is coupled to the outer surface of the intake bolt body and supports the lower surface of the intake movement limiting disc axially along the intake bolt body to fix the intake movement limiting disc.

[0030] The crank body may further include: a first engagement hole extending axially from one end of the inner housing through the inner communicating hole to allow a portion of the piston assembly to enter and exit; a second engagement hole extending axially from one end of the outer housing through the interior of the mounting member communicating with the inner communicating hole to allow another portion of the piston assembly to enter and exit; and a switch bracket detachably coupled to the outer housing to selectively open and close the second engagement hole.

[0031] The crank body may further include: an integrated discharge port communicating with the mounting base, which integrates and discharges compressed air flowing in through the mounting base to the outside; wherein the mounting base may further include: a filter support groove accommodating and supporting a portion of the filter; a guide hole communicating with the filter support groove and the first stroke space, guiding air filtered by the filter to the first stroke space; a first discharge port, a portion of which communicates with the cylinder body and another portion of which communicates with the integrated discharge port, guiding compressed air flowing into the cylinder body through the cylinder body to the integrated discharge port; and an external connecting hole communicating with the first heat dissipation space and the first heat dissipation hole; wherein the cylinder body may further include: a first filter receiving hole communicating with the filter support groove. The cylinder head may further include: a second filter housing, which is connected to the first filter housing and houses another portion of the filter; a second discharge port, which is connected to the first discharge port and guides compressed air flowing into the cylinder head through the cylinder head to the first discharge port; a third discharge port, which is connected to the third discharge port and guides the compressed air contained in the third discharge port to a first direction; and a fourth discharge port, which is connected to the second discharge port and the third discharge port and guides the compressed air flowing into the cylinder head through the third discharge port to a second direction different from the first direction, and flows into the second discharge port.

[0032] The filter may include: a filter body, which is cylindrical and configured to pass through the filter support groove, the first filter receiving hole, and the second filter receiving hole, and filter unfiltered air flowing into the interior through the upper part of the opening; and an air inflow nozzle, which is attached to the upper end of the filter body to allow unfiltered air from the outside to flow into the interior of the filter body, and is detachably attached to the second filter receiving hole. The air inflow nozzle may include: a first air guide hole, which communicates with the outside and guides the unfiltered air flowing into the interior to a first direction; and a second air guide hole, which communicates with the first air guide hole and the filter body, and guides the unfiltered air flowing into the interior through the first air guide hole to a second direction different from the first direction, and flows into the interior of the filter body.

[0033] To address the aforementioned problems, an embodiment of the present invention provides an air compressor, comprising: a tank storing compressed air; a drive motor mounted on the tank to generate rotational force; and a head module coupled to the drive motor to generate compressed air using the rotational force of the drive motor as a power source. The head module includes: a crankshaft that receives power and rotates via the drive motor; a piston assembly including a connecting rod coupled to the crankshaft and a piston reciprocating via the connecting rod; a crank body coupled to the drive motor and internally housing the crankshaft; a cylinder assembly coupled to and communicating with the crank body, the piston disposed internally within the cylinder assembly; and a valve unit housed within the cylinder assembly, configured to open and close with the reciprocating motion of the piston. A filter, incorporated in the cylinder assembly, filters air flowing into the cylinder assembly; and a cooling fan, incorporated in the crankshaft and disposed at the end of the crank body, allows unfiltered air to flow into the crank body as it rotates with the aid of the crankshaft; wherein the crank body includes: a first stroke space, the first stroke space accommodating the crankshaft for air filtered by the cylinder assembly to flow in; and a first heat dissipation space, the first heat dissipation space isolated from the first stroke space for unfiltered air flowing in through the cooling fan; the cylinder assembly includes: a second stroke space, the second stroke space communicating with the first stroke space and accommodating the piston and the valve unit; and a second heat dissipation space, the second heat dissipation space isolated from the second stroke space and communicating with the first heat dissipation space for unfiltered air flowing through the first heat dissipation space and discharged to the outside.

[0034] It may also include: a motor mounting unit, which is attached to the upper part of the tank and supports the drive motor, configured to change the position of the drive motor along the axial direction of the drive motor; and a bracket, configured to be attached to the lower part of the tank and supported on the ground to absorb and disperse vibrations transmitted through the tank. The mounting unit may include: a base frame, which is attached to the upper part of the tank; a buffer member, which is disposed on the upper part of the base frame; a mounting bracket, which is attached to the lower part of the motor and supported on the upper part of the buffer member; and a connecting member, which passes through the base frame, the buffer member, and the mounting bracket. The buffer component and the mounting bracket are connected and fixed on the base frame. The buffer component may include: a buffer tube formed of an elastic material, which elastically supports the base frame and the mounting bracket; and a buffer coil housed inside the buffer tube, which elastically supports the base frame and the mounting bracket. The bracket includes: a support frame attached to the lower surface of the tank; and a support base attached to the support frame and supported on the ground. The support frame includes: a vertical support portion attached to the lower surface of the tank and bent into an "S" shape, which elastically deforms in the vertical direction when an external force is applied. The system comprises: a horizontal support portion, which is attached to the lower end of the vertical support portion and detachably connected to the support base; the support base including: a height adjustment member threadedly connected to the support frame and adjustable in length protruding outward from the support frame; and a support member attached to the height adjustment member and supported on the ground, configured to mitigate and disperse vibrations transmitted through the support frame; wherein the support member includes: a first disc member, which is disc-shaped and attached to the height adjustment member; and an elastic member attached to the upper end of the first disc member, elastically supporting the horizontal support portion. The system includes: a second disc component, spaced apart from and supported on the ground, having a larger diameter than the first disc component; a connecting component, which is annular, surrounding and connecting the first and second disc components; a vibration dispersion ball component, multiple of which are disposed between the first and second disc components, capable of rolling between them if vibration is transmitted from the first disc component; and an auxiliary elastic component, multiple of which are disposed along the edge of the second disc component, elastically supporting the horizontal support portion.

[0035] It may also include: a main support unit, which is coupled to the lower surface of the crank body and configured to be supported by the tank to mitigate vibration of the compressor body, wherein the main support unit includes: a telescopic rod assembly, which is coupled to the lower surface of the crank body and is adjustable in length; an elastic support member, which is housed inside the telescopic rod assembly to elastically support the telescopic rod assembly; and an anti-slip pad, which is formed of an elastic material and coupled to the end of the telescopic rod assembly to support the outer surface of the tank.

[0036] Invention Effects

[0037] According to an embodiment of the present invention, the air flowing into the stroke space is filtered by a filter, and the tubular inner shell that houses the piston assembly is completely sealed by a motor at one end and a foreign flow prevention cover at the other end, thus completely preventing foreign flow into the stroke space.

[0038] In addition, the crankcase and cylinder assembly that form the stroke space are each formed as a double-walled structure, and the inner shell disposed inside the outer shell has a closed structure. Therefore, when the piston assembly is working, the noise flowing out of the stroke space can be minimized, and the compressed air can be prevented from flowing out.

[0039] In addition, a connection hole is formed on one side of the crankcase, so that the crankcase can be connected to or separated from the drive motor while the piston assembly is connected to the drive motor. Therefore, the assembly difficulty is reduced and the work efficiency is improved, which enables fast and precise operation, and in turn, easy maintenance.

[0040] In addition, while forcibly circulating external air into the crankcase and cylinder assembly formed by the double-wall structure, the cylinder block directly exhausts the heat generated by the cylinder assembly to the outside, thereby maximizing the cooling performance.

[0041] In addition, a discharge movement limiting disc is provided on the upper part of the discharge valve disc. The discharge movement limiting disc supports the discharge valve disc with an open flow path and alleviates the impact on the discharge valve disc. Therefore, it can prevent deformation and damage to the discharge valve disc and minimize the noise generated when in contact with the discharge movement limiting disc.

[0042] In addition, an intake movement limiting disc is provided on the upper part of the intake valve disc. The intake movement limiting disc supports the intake valve disc with open air supply hole and relieves the impact of the intake valve disc. Therefore, it can prevent the intake valve disc from deforming and being damaged, and can minimize the noise generated when in contact with the intake movement limiting disc.

[0043] The effects of the present invention are not limited to those illustrated above, and include a greater variety of effects. Attached Figure Description

[0044] Figure 1 This is a perspective view of an air compressor illustrating an embodiment of the present invention.

[0045] Figure 2 This is a partially exploded perspective view showing the exploded state of the header module according to an embodiment of the present invention.

[0046] Figure 3 This is a cross-sectional view showing the internal structure of the head module according to an embodiment of the present invention.

[0047] Figure 4 This is a cross-sectional view showing the path of unfiltered air flowing into the interior of the head module of an embodiment of the present invention.

[0048] Figure 5 This is a perspective view of a crankcase illustrating an embodiment of the present invention.

[0049] Figure 6 This is a perspective view of the back side of the crankcase according to an embodiment of the present invention.

[0050] Figure 7 This is a perspective view of a cylinder block illustrating an embodiment of the present invention.

[0051] Figure 8A This is a perspective view of a cylinder head illustrating an embodiment of the present invention.

[0052] Figure 8B This is a perspective view of the bottom surface of a cylinder head according to an embodiment of the present invention.

[0053] Figure 9 This is a perspective view showing the crankcase of an embodiment of the present invention engaged with the outside of a piston assembly coupled to a motor.

[0054] Figure 10 This is a cross-sectional view showing the internal structure of a cylinder assembly according to an embodiment of the present invention.

[0055] Figure 11 This is a cross-sectional view of a valve unit illustrating an embodiment of the present invention.

[0056] Figure 12 This is a cross-sectional view of a filter illustrating an embodiment of the present invention.

[0057] Figure 13 This is a diagram schematically illustrating the process of opening and closing the discharge valve according to an embodiment of the present invention.

[0058] Figure 14This is a diagram schematically illustrating the process of opening and closing the intake valve according to an embodiment of the present invention.

[0059] Explanation of reference numerals in the attached figures

[0060] 1000: Air compressor; 1: Tank; 2: Drive motor; 3: Compressor body; 31: Crankshaft; 32: Piston assembly; 321: Connecting rod; 322: Piston; 322A: Air supply port; 33: Crank body; S1: First stroke space; H1: First heat dissipation space; 331: Inner shell; 331A: Internal connecting hole; 332: Foreign matter ingress prevention cover; 333: Outer shell; 333A: Mounting base; 333A1: Filter support groove; 333A2: Inlet Guide hole; 333A3: First discharge hole; 333A4: External connecting hole; 334: Fan shroud; 334A: Spiral grille; 335: First connecting hole; 336: Second connecting hole; 337: Switch bracket; 338: Integrated discharge hole; 34: Cylinder assembly; S2: Second stroke space; H2: Second heat dissipation space; 341: Cylinder liner; 342: Cylinder block; 342A: First heat dissipation hole; 342B: First filter receiving hole; 342C: Second discharge hole 343: Cylinder head; 343A: Second heat dissipation hole; 343B: Second filter housing hole; 343C: Delay chamber; 343D: Third discharge hole; 343E: Fourth discharge hole; 35: Valve unit; 351: Valve body; 351A: Flow path; 352: Discharge valve; 352A: Discharge support bolt member; 352A1: Discharge bolt body; 352A2: Discharge bolt head; 352B: Discharge valve disc; 352C: Discharge movement limiting disc; 3 52D: Discharge disc support member; 353: Intake valve; 353A: Intake support bolt member; 353A1: Intake bolt body; 353A2: Intake bolt head; 353B: Intake valve disc; 353C: Intake movement limiting disc; 353D: Intake disc support member; 36: Filter; 361: Filter body; 362: Air inlet nozzle; 362A: First air guide hole; 362B: Second air guide hole; 37: Cooling fan. Detailed Implementation

[0061] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, various modifications can be made to the following embodiments, therefore the scope of this application is not limited or restricted by the following embodiments. Various modifications can be made to the embodiments, and the scope of the present invention is not limited or restricted by the embodiments.

[0062] The specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be implemented in various forms. Therefore, the embodiments should not be limited to the specific disclosed forms, and the scope of this specification includes changes, equivalents, or substitutions of the technical concept.

[0063] The terms "first" or "second" can be used to describe multiple constituent elements, but such terms should only be interpreted for the purpose of distinguishing one constituent element from the others. For example, a first constituent element can be named a second constituent element, and similarly, a second constituent element can be named a first constituent element.

[0064] When it is mentioned that a constituent element is "connected to" other constituent elements, although it may be directly connected to or joined to the other constituent elements, it should be understood that there may be other constituent elements in between.

[0065] The terminology used in the embodiments is for illustrative purposes only and is not intended to limit the embodiments. The singular description includes the plural description unless otherwise expressly defined herein. It should be understood that terms such as "comprising" or "having" in this specification are used only to specify the presence of the described features, numbers, steps, operations, constituent elements, components, or combinations thereof, and do not preclude the presence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0066] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art. Terms defined in commonly used dictionaries shall be interpreted in a meaning consistent with the context of the relevant art text, and shall not be interpreted as strange or overly formal unless explicitly defined in this application.

[0067] Furthermore, in the description with reference to the accompanying drawings, the same reference numerals are used for the same constituent elements, and repeated descriptions are omitted. In describing embodiments, detailed descriptions of relevant well-known technologies are omitted when it is determined that such detailed descriptions would unnecessarily obscure the embodiments.

[0068] The advantages and features of the present invention, as well as the methods for achieving them, can be obtained through the accompanying appendix. Figure 1 The invention is made clear with reference to the embodiments described in detail below. However, the invention is not limited to the embodiments disclosed below and can be implemented in many other ways. These embodiments are provided merely to make the invention more fully disclosed and to fully convey the scope of the invention to those skilled in the art, and the invention is defined only by the claims.

[0069] In the embodiments of this invention, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms identical to those defined in commonly used dictionaries should be interpreted as having the same meaning as in the context of conventional art, and should not be overly or excessively interpreted as having a formal meaning unless explicitly defined in the embodiments of this invention.

[0070] The shapes, sizes, proportions, angles, and numbers disclosed in the accompanying drawings for illustrating embodiments of the present invention are exemplary, and therefore the present invention is not limited to the illustrated items. Furthermore, in the description of the present invention, detailed descriptions of the functions of related prior art will be omitted if they are deemed to obscure the subject matter of the present invention. When terms such as "comprising," "having," and "constituting" are used in this specification, other parts may be added unless "only" is used. When constituent elements are expressed in the singular, the inclusion of multiple elements is included unless otherwise explicitly stated.

[0071] When interpreting constituent elements, it should be interpreted as including the margin of error even if there is no separate explicit statement.

[0072] In cases where the description pertains to the positional relationship, such as "on top of," "above," "below," or "beside," one or more other parts can be located between the two parts mentioned above, as long as "adjacent" or "directly" is not used.

[0073] The use of the term "elements" or "on" to refer to different elements or layers includes all cases where other layers or elements are located above or in between other elements. Throughout this specification, the same reference numerals refer to the same constituent elements.

[0074] The sizes and thicknesses of the structures shown in the accompanying drawings are for illustrative purposes only, and the present invention is not necessarily limited to the sizes and thicknesses of the structures shown.

[0075] Each feature of the various embodiments of the present invention may be combined or integrated with each other in part or in whole. As those skilled in the art will fully understand, various linkages and drives are possible in the technical sense. Each embodiment may be implemented independently or together through association.

[0076] Figure 1 This is a perspective view of an air compressor illustrating an embodiment of the present invention.

[0077] Reference Figure 1The air compressor 1000 (hereinafter referred to as "air compressor 1000") provided in the embodiments of the present invention includes a tank 1, a drive motor 2 and a head module 3.

[0078] Tank 1 is located below drive motor 2 and head module 3, supports drive motor 2 and head module 3, and stores compressed air inside.

[0079] Can 1 can be formed from a metal material that does not rust or corrode. For example, can 1 can be formed from aluminum.

[0080] The drive motor 2 is mounted on the upper part of the tank 1 and connected to the head module 3, generating rotational force by means of electricity applied from the outside.

[0081] One end of the drive motor 2 may be equipped with a tubular connector for engaging with the head module 3.

[0082] At this time, the connector can be configured with a closed plate that supports the shaft of the drive motor 2, with one side of the opening of the closed head module 3 inside.

[0083] The head module 3 is integrated with the drive motor 2, and the rotational force of the drive motor 2 generates compressed air as a power source.

[0084] Figure 2 This is a partially exploded perspective view showing the exploded state of the header module according to an embodiment of the present invention. Figure 3 This is a cross-sectional view showing the internal structure of the head module according to an embodiment of the present invention. Figure 4 This is a cross-sectional view showing the path of unfiltered air flowing into the interior of the head module of an embodiment of the present invention.

[0085] Reference Figures 2 to 4 The head module 3 includes a crankshaft 31, a piston assembly 32, a crank body 33, a cylinder assembly 34, a valve unit 35, a filter 36, and a cooling fan 37.

[0086] The crankshaft 31 is housed in the crank body 33 and obtains power from the outside to rotate.

[0087] More specifically, the crankshaft 31 is coupled to the drive motor 2 and obtains power from the drive motor 2 to rotate.

[0088] The piston assembly 32 includes: a connecting rod 321, which is coupled to a crankshaft 31 and reciprocates via the crankshaft 31; and a piston 322, which is coupled to the connecting rod 321, housed in a cylinder assembly 34, and reciprocates via the connecting rod 321 to compress air housed within the cylinder assembly 34. For example, the piston 322 can withstand high temperatures and pressures and can be made of a special cast iron / hard alloy with low wear.

[0089] The crank body 33 is attached to the drive motor 2 and houses the crankshaft 31 inside.

[0090] The crank body 33 is formed as a double-walled structure, thereby creating multiple spaces that are isolated from each other inside.

[0091] Specifically, the crankshaft 31 is housed inside the crank body 33, forming a first stroke space S1 that allows air filtered by the cylinder assembly 34 to flow in, and a first heat dissipation space H1 that is isolated from the first stroke space S1 and allows unfiltered air flowing in through the cooling fan 37 to flow in.

[0092] The crank body 33 may include a crank case, a foreign matter ingress prevention cover 332, and a fan cover 334.

[0093] Figure 5 This is a perspective view of a crankcase illustrating an embodiment of the present invention. Figure 6 This is a perspective view of the back side of the crankcase according to an embodiment of the present invention.

[0094] Reference Figures 3 to 6 The crankcase may include an inner shell 331 and an outer shell 333.

[0095] The inner shell 331 is formed in a tubular shape, and the interior of the inner shell 331 can form a first stroke space S1 to accommodate the crankshaft 31.

[0096] The outer surface of the inner shell 331 may be formed with an inner connecting hole 331A that connects the first stroke space S1 with the second stroke space S2 of the cylinder assembly 34, which houses the piston 322 and the valve unit 35.

[0097] One end of the inner shell 331 can be connected to the outer shell 333 to close one side of the first heat dissipation space H1, and is also connected to and closed by a connector provided on the drive motor 2. In addition, the other end of the inner shell 331 can be connected to and closed by a foreign flow ingress prevention cover 332.

[0098] The outer shell 333 is formed in a tubular shape and can be separated from the inner shell 331 and disposed on the outside of the inner shell 331 to surround the outer periphery of the inner shell 331.

[0099] Therefore, a first heat dissipation space H1 can be formed inside the outer shell 333, that is, between the outer shell 333 and the inner shell 331.

[0100] The outer surface of the housing 333 may be formed with a mounting base 333A that connects the first heat dissipation space H1 with the second heat dissipation space H2 formed inside the cylinder assembly 34 and allows the cylinder assembly 34 to be joined.

[0101] One end of the outer shell 333 can be connected to and closed with the inner shell 331, and the other end of the outer shell 333 can be combined with and closed with the fan cover 334.

[0102] Reference Figures 2 to 4 The foreign matter ingress prevention cover 332 can be attached to the other end of the open inner shell 331 to close the other end of the inner shell 331. Thus, not only is foreign matter ingress prevented from entering the other end of the inner shell 331, but noise is also blocked.

[0103] The foreign matter ingress prevention cover 332 can support a portion of the crankshaft 31. Therefore, the crankshaft 31 can rotate stably.

[0104] The fan cover 334 can be attached to the other end of the housing 333 to protect the cooling fan 37 configured inside the housing 333 from external influences.

[0105] The interior of the fan shroud 334 may be configured with a spiral grille 334A that converts unfiltered air flowing into the first heat dissipation space H1 into a straight flow.

[0106] The fan cover 334 can be connected to the housing 333 in a variety of ways.

[0107] As an example, the fan cover 334 can be connected to the housing 333 by fastening methods such as bolts.

[0108] As another example, the fan cover 334 can be detachably attached to the housing 333 by magnetic force.

[0109] Specifically, one side surface of the fan shroud 334, which connects to the end of the outer casing 333, can be formed with a wedge-shaped engagement protrusion that protrudes outward and whose width gradually decreases along the protrusion direction. Furthermore, engagement magnets can be disposed at the ends of the engagement protrusions. At this time, the end of the outer casing 333, which is attached to the fan shroud 334, has an engagement groove with a shape corresponding to the wedge-shaped engagement protrusion, and the end of the engagement groove can be disposed with a magnetic body that is detachably attached to the engagement magnet by magnetic force.

[0110] Therefore, users can quickly attach or detach the fan cover 334 from the housing 333.

[0111] Reference Figure 2 and Figure 4 The cylinder assembly 34 is attached to the crank body 33 and is connected to the crank body 33.

[0112] The cylinder assembly 34 is internally equipped with a piston 322.

[0113] The cylinder assembly 34 is formed as a double-walled structure, thereby creating multiple spaces that are isolated from each other inside.

[0114] Specifically, the cylinder assembly 34 has a second stroke space S2 that communicates with the first stroke space S1 and accommodates the piston 322 and the valve unit 35. In addition, the cylinder assembly 34 has a second heat dissipation space H2 that is isolated from the second stroke space S2 and communicates with the first heat dissipation space H1, allowing unfiltered air passing through the first heat dissipation space H1 to flow and be discharged to the outside.

[0115] The cylinder assembly 34 may include a cylinder liner 341, a cylinder block 342, and a cylinder head 343.

[0116] The cylinder liner 341 can communicate with the first stroke space S1 and be disposed on the lower side of the valve unit 35.

[0117] Inside the cylinder liner 341, the piston 322 can be configured to slide and move.

[0118] Therefore, the second stroke space S2 can be formed between the piston 322 and the valve unit 35.

[0119] For example, cylinder liner 341 can withstand high temperature and high pressure, and can be made of special cast iron / hard alloy with less wear.

[0120] Figure 7 This is a perspective view of a cylinder block illustrating an embodiment of the present invention.

[0121] Reference Figure 4 and Figure 7 A portion of the cylinder block 342 is connected to the inner connecting hole 331A and surrounds the cylinder liner 341, while another portion is connected to the upper end of the mounting base 333A and one side surface can be exposed to the outside.

[0122] The interior of the cylinder block 342 may have a first heat dissipation hole 342A that communicates with the first heat dissipation space H1 and forms part of the second heat dissipation space H2.

[0123] The cylinder block 342 may be formed of a metallic material that directly releases heat conducted from the cylinder liner 341 to the outside. For example, the cylinder block 342 may be formed of aluminum or copper, or may include at least one of them.

[0124] At this point, multiple heat dissipation grooves can be formed on the outer surface of the cylinder block 342 to maximize heat dissipation performance. Therefore, the increased heat dissipation area maximizes heat dissipation performance.

[0125] Figure 8A This is a perspective view of a cylinder head illustrating an embodiment of the present invention. Figure 8B This is a perspective view of the bottom surface of a cylinder head according to an embodiment of the present invention.

[0126] Reference Figure 4 , Figure 8A and Figure 8B The cylinder head 343 can be attached to the upper end of the cylinder block 342 to fix the valve unit 35.

[0127] The interior of the cylinder head 343 may have a second heat dissipation hole 343A that communicates with the first heat dissipation hole 342A to form another part of the second heat dissipation space H2.

[0128] Therefore, the unfiltered air flowing into the interior of the housing 333 by means of the cooling fan 37 can expel the heat emitted from the inner housing 331 and the cylinder liner 341 to the outside while passing through the first heat dissipation space H1, the first heat dissipation hole 342A and the second heat dissipation hole 343A in sequence.

[0129] Figure 9 This is a perspective view showing the crankcase of an embodiment of the present invention engaged with the outside of a piston assembly coupled to a motor.

[0130] Reference Figure 2 and Figure 9 The crank body 33 can be detachably attached to the drive motor 2 while the crankshaft 31 and piston assembly 32 are attached to the drive motor 2.

[0131] Reference Figure 2 , Figure 5 , Figure 6 and Figure 9 The crank body 33 may also include a first engagement hole 335, a second engagement hole 336, and a switch bracket 337.

[0132] The first engagement hole 335 can pass through the inner connecting hole 331A from one end of the inner housing 331 for engaging the drive motor 2 along the axial direction of the crank body 33.

[0133] Therefore, when the crank body 33 is engaged or disengaged from the drive motor 2, a portion of the piston assembly 32 can enter the first engagement hole 335.

[0134] The second connecting hole 336 can pass through the interior of the mounting base 333A, which communicates with the inner connecting hole 331A, from one end of the housing 333 along the axial direction of the crank body 33.

[0135] Therefore, when the crank body 33 is engaged or disengaged from the drive motor 2, another part of the piston assembly 32 can enter the second engagement hole 336.

[0136] The switch bracket 337 can be detachably attached to the housing 333 to selectively switch the second engagement hole 336.

[0137] Figure 10 This is a cross-sectional view showing the internal structure of a cylinder assembly according to an embodiment of the present invention.

[0138] Reference Figure 3, Figure 6 and Figure 10 The crank body 33 may also include an integrated discharge port 338.

[0139] The integrated discharge port 338 is connected to the mounting base 333A, which can integrate and discharge the compressed air flowing in through the mounting base 333A to the outside.

[0140] At this time, refer to Figure 6 and Figure 10 The mounting base 333A may include: a filter support groove 333A1, which accommodates and supports a portion of the filter 36; a guide hole 333A2, which connects the filter support groove 333A1 and the first stroke space S1, guiding the air filtered by the filter 36 to the first stroke space S1; a first discharge hole 333A3, a portion of which connects to the cylinder body 342 and another portion of which connects to the integrated discharge hole 338, guiding the compressed air flowing into the cylinder body 342 to the integrated discharge hole 338; and an external connecting hole 333A4, which connects the first heat dissipation space H1 and the first heat dissipation hole 342A.

[0141] Additionally, refer to Figure 10 The first filter receiving hole 342B is connected to the filter support groove 333A1 and houses another part of the filter 36; and the second discharge hole 342C is connected to the first discharge hole 333A3 and guides the compressed air flowing into the cylinder head 343 to the first discharge hole 333A3.

[0142] Additionally, refer to Figure 8 and... Figure 10 The cylinder head 343 may include: a second filter receiving hole 343B, which communicates with the first filter receiving hole 342B and internally accommodates another part of the filter 36; a delay chamber 343C, which is disposed on the upper part of the valve unit 35 and accommodates compressed air flowing in through the valve unit 35; a third discharge hole 343D, which communicates with the delay chamber 343C and guides the compressed air contained in the delay chamber 343C to a first direction; and a fourth discharge hole 343E, which communicates with the second discharge hole 342C and the third discharge hole 343D and guides the compressed air flowing in through the third discharge hole 343D to a second direction different from the first direction, and flows into the second discharge hole 342C.

[0143] Reference Figure 2 and Figure 4The valve unit 35 is housed in the cylinder assembly 34 and is configured to open and close in response to the reciprocating motion of the piston 322.

[0144] Figure 11 This is a cross-sectional view of a valve unit illustrating an embodiment of the present invention.

[0145] Reference Figure 11 The valve unit 35 may include a valve body 351, an exhaust valve 352, and an intake valve 353.

[0146] The valve body 351 can be configured between the cylinder liner 341 and the cylinder head 343.

[0147] The interior of the valve body 351 may have at least one flow path 351A that connects the second stroke space S2 and the delay chamber 343C. For example, the outer surface of the valve body 351 may be fitted with an airtight ring made of an elastomeric material. Alternatively, the valve body 351 may be made of alloy steel such as stainless steel, nickel-chromium steel, and nickel-molybdenum steel.

[0148] The discharge valve 352 is connected to the valve body 351 and can switch the flow path 351A through the reciprocating motion of the piston 322.

[0149] Specifically, if the piston 322 moves upward within the cylinder liner 341, the discharge valve 352 can open at least one flow path 351A by means of pressure, allowing compressed air in the second stroke space S2 to flow into the delay chamber 343C. If the piston 322 moves downward within the cylinder liner 341, the discharge valve 352 can close at least one flow path 351A by means of suction.

[0150] Figure 13 This is a diagram schematically illustrating the process of opening and closing the discharge valve according to an embodiment of the present invention.

[0151] Reference Figure 13 The discharge valve 352 may include a discharge support bolt member 352A, a discharge valve disc 352B, a discharge movement restriction disc 352C, and a discharge disc support member 352D.

[0152] The discharge support bolt member 352A may include a discharge bolt body 352A1 connected to the center of the valve body 351 and a discharge bolt head 352A2 disposed at the upper end of the discharge bolt body 352A1.

[0153] The discharge valve disc 352B can be configured between the discharge bolt head 352A2 and the valve body 351.

[0154] If piston 322 moves downward, discharge valve disc 352B is supported on top of valve body 351 to close at least one flow path 351A. If piston 322 moves upward, discharge valve disc 352B rises axially along discharge bolt body 352A1 to open at least one flow path 351A.

[0155] The discharge movement restriction disc 352C can be combined with the discharge bolt body 352A1 and disposed on the upper part of the discharge valve disc 352B.

[0156] If the discharge valve disc 352B rises, the discharge movement limiting disc 352C can contact the top of the discharge valve disc 352B to limit the movement of the discharge valve disc 352B.

[0157] At this time, the discharge moving limit disc 352C can have a preset diameter so as to fully contact the top of the discharge valve disc 352B and stably support the discharge valve disc 352B.

[0158] For example, the ratio of the diameter of the discharge valve disc 352B to the diameter of the discharge movable restriction disc 352C can be 1:1 or more and 1:1.4 or less.

[0159] Therefore, sufficient support area of ​​the discharge movable limiting disc 352C relative to the discharge valve disc 352B can be ensured, preventing deformation and damage to the discharge valve disc 352B, and minimizing the noise generated when the discharge movable limiting disc 352C contacts.

[0160] Without the discharge movement limiting disc 352C, the rising discharge valve disc 352B is held in place by the discharge bolt head 352A2. However, in this case, due to the relatively small diameter of the discharge bolt head 352A2, sufficient support area cannot be ensured. Whenever the discharge valve disc 352B contacts the discharge bolt head 352A2, the pressure of the discharge bolt head 352A2 is concentrated on the center of the discharge valve disc 352B. As a result, the center of the discharge valve disc 352B bends and deforms, causing cracks and noise.

[0161] The discharge disc support member 352D is attached to the outer surface of the discharge bolt body 352A1 and can support the lower surface of the discharge movement restriction disc 352C along the axial direction of the discharge bolt body 352A1.

[0162] Therefore, the discharge disc support member 352D can fix the discharge movement restriction disc 352C.

[0163] The intake valve 353 is coupled to the piston 322 and can switch at least one air supply port 322A formed on the piston 322 by the reciprocating motion of the piston 322.

[0164] Specifically, if the piston 322 moves upward within the cylinder liner 341, the intake valve 353 can close at least one air supply hole 322A formed on the piston 322 by means of pressure. If the piston 322 moves downward within the cylinder liner 341, the intake valve 353 can open at least one air supply hole 322A by means of suction, thereby allowing filtered air in the first stroke space S1 to flow into the second stroke space S2.

[0165] Figure 14 This is a diagram schematically illustrating the process of opening and closing the intake valve according to an embodiment of the present invention.

[0166] Reference Figure 14 The intake valve 353 may include an intake support bolt member 353A, an intake valve disc 353B, an intake movement limiting disc 353C, and an intake disc support member 353D.

[0167] The intake support bolt component 353A may include an intake bolt body 353A1 connected to the center of the upper end of the piston 322 and an intake bolt head 353A2 disposed at the upper end of the intake bolt body 353A1.

[0168] The intake valve disc 353B can be configured between the intake bolt head 353A2 and the piston 322.

[0169] If the piston 322 moves upward, the intake valve disc 353B is supported on top of the piston 322 to close at least one air supply hole 322A. If the piston 322 moves downward, the intake valve disc 352B rises axially along the intake bolt body 353A1 to open at least one air supply hole 322A.

[0170] The intake movement limiting disc 353C can be combined with the intake bolt body 353A1 and disposed on the upper part of the intake valve disc 353B.

[0171] If the intake valve disc 353B rises, the intake movement limiting disc 353C can contact the top of the intake valve disc 353B to limit the movement of the intake valve disc 353B.

[0172] At this time, the intake movement limiting disc 353C can have a preset diameter so as to fully contact the top of the intake valve disc 353B and stably support the intake valve disc 353B.

[0173] For example, the ratio of the diameter of the intake valve disc 353B to the diameter of the intake movement limiting disc 353C can be 1:1 or more and 1:1.4 or less.

[0174] Therefore, it can ensure that the intake moving limit disc 353C has sufficient support area relative to the intake valve disc 353B, prevent deformation and damage to the intake valve disc 353B, and minimize the noise generated when the intake moving limit disc 353C contacts.

[0175] Without the intake movement limiting disc 353C, the rising intake valve disc 353B is held in place by the intake bolt head 353A2. However, in this case, due to the relatively small diameter of the intake bolt head 353A2, sufficient support area cannot be ensured. Whenever the intake valve disc 353B contacts the intake bolt head 353A2, the pressure of the intake bolt head 353A2 is concentrated on the center of the intake valve disc 353B. As a result, the center of the intake valve disc 353B bends and deforms, causing cracks and noise.

[0176] The intake disc support member 353D is attached to the outer surface of the intake bolt body 353A1 and can support the lower surface of the intake movement restriction disc 353C along the axial direction of the intake bolt body 353A1.

[0177] Therefore, the intake disc support member 353D can fix the intake movement restriction disc 353C.

[0178] Reference Figure 2 and Figure 10 The filter 36 is integrated into the cylinder assembly 34 to filter the air flowing into the cylinder assembly 34.

[0179] The filter 36 may include a filter body 361 and an air inlet nozzle 362.

[0180] The filter body 361 can be configured to pass through the filter support groove 333A1, the first filter receiving hole 342B and the second filter receiving hole 343B.

[0181] The filter body 361 is formed as a cylindrical structure with an opening at the top, so that air can flow into the nozzle 362 at the top.

[0182] Therefore, the filter body 361 can filter unfiltered air that flows into the interior through the upper part of the opening.

[0183] The air inlet nozzle 362 can be detachably attached to the second filter receiving port 343B.

[0184] The air inlet nozzle 362 can be attached to the upper end of the filter body 361 and communicate with the filter body 361, so that unfiltered air from the outside can flow into the interior of the filter body 361.

[0185] Figure 12 This is a cross-sectional view of a filter illustrating an embodiment of the present invention.

[0186] Reference Figure 12 The air inflow nozzle 362 may include: a first air guide hole 362A, which communicates with the outside and guides unfiltered air flowing into the interior to a first direction; and a second air guide hole 362B, which communicates with the first air guide hole 362A and the filter body 361 and guides unfiltered air flowing into the interior through the first air guide hole 362A to a second direction different from the first direction, and flows into the interior of the filter body 361.

[0187] Reference Figure 2 and Figure 4 The cooling fan 37 can be combined with the crankshaft 31 and disposed at the end of the crank body 33, and is housed in the first heat dissipation space H1.

[0188] As the cooling fan 37 rotates with the help of the crankshaft 31, it causes unfiltered air to flow from the outside into the interior of the crank body 33 and circulates it.

[0189] Reference Figure 1 and Figure 2 The air compressor 1000 may further include: an aftercooler (not shown) for cooling high-temperature compressed air; a dry unit and a moisture separation unit (not shown) for removing moisture from the compressed air flowing in through the aftercooler; a controller (not shown) for controlling the drive of a motor; a pressure gauge (not shown) for displaying the output pressure of the compressed air and the pressure inside the tank 1; and an operating unit (not shown) for using the compressed air, etc.

[0190] In addition, the air compressor 1000 may also include a motor mounting unit (not shown) and a bracket (not shown).

[0191] The motor mounting unit can be attached to the upper part of the tank 1 to support the drive motor 2, and is configured to change the position of the drive motor 2 along the axial direction of the drive motor 2.

[0192] For example, the motor mounting unit may include: a base frame, which is attached to the upper part of the tank 1; a buffer member, which is placed on the upper part of the base frame; a mounting bracket, which is attached to the lower part of the motor 2 and supported on the upper part of the buffer member; and a connecting member, which passes through the base frame, the buffer member and the mounting bracket to connect them, and fixes the buffer member and the mounting bracket on the base frame.

[0193] The buffer component may include: a buffer tube formed of an elastic material, an elastic support base and a mounting bracket; and a buffer coil housed inside the buffer tube, an elastic support base and a mounting bracket.

[0194] The support can be attached to the lower part of the tank 1 to support it on the ground and absorb and disperse the vibrations transmitted through the tank 1.

[0195] The support may include a support frame attached to the lower surface of the tank 1 and a support base attached to the support frame and supported on the ground.

[0196] The support frame may include a vertical support portion that is attached to the lower surface of the tank and bent into an "S" shape, which elastically deforms in the vertical direction when an external force is applied, and a horizontal support portion that is attached to the lower end of the vertical support portion and whose support base is detachably attached.

[0197] The support base may include a height adjustment member that is threaded into the support frame and can be adjusted to extend outward from the support frame, and a support member that is coupled to the height adjustment member and supported on the ground to mitigate and disperse vibrations transmitted through the support frame.

[0198] The supporting components may include: a first disc component, which is disc-shaped and integrated with a height adjustment component; an elastic component, which is integrated with the upper end of the first disc component and elastically supports the horizontal support portion; a second disc component, which is spaced apart from the first disc component and supported on the ground, and has a larger diameter than the first disc component; a connecting component, which is annular, surrounds the first and second disc components, and connects the first and second disc components; a vibration dispersion ball component, in multiple configurations between the first and second disc components, which, if vibration is transmitted from the first disc component, performs rolling motion between the first and second disc components; and auxiliary elastic components, in multiple configurations along the edge of the second disc component, elastically supporting the horizontal support portion.

[0199] Additionally, the air compressor 1000 may also include a main support unit (not shown).

[0200] The main support unit can be attached to the lower surface of the crank body 33 and configured to be supported by the canister 1 to mitigate the vibration of the head module 3.

[0201] For example, the main support unit may include: a telescopic rod assembly, which is attached to the lower surface of the crank body 33 and whose length is adjustable; an elastic support member, which is housed inside the telescopic rod assembly to elastically support the telescopic rod assembly; and an anti-slip pad, which is formed of an elastic material and is attached to the end of the telescopic rod assembly to support the outer surface of the tank.

[0202] As described above, according to an embodiment of the present invention, the air flowing into the stroke space is filtered by the filter 36, and the tubular inner shell 331 that houses the piston assembly 32 is completely sealed by the motor 2 at one end and the foreign flow prevention cover 332 at the other end. Therefore, it is possible to completely block the foreign flow into the stroke space and to block noise through the foreign flow prevention cover 332.

[0203] In addition, the crankcase and cylinder assembly 34 that form the stroke space are respectively formed as double-walled structures, and the inner shell 331 disposed inside the outer shell 333 has a closed structure. Therefore, when the piston assembly 32 is working, the noise flowing out of the stroke space can be minimized, and the compressed air can be prevented from flowing out.

[0204] In addition, engagement holes 335 and 336 are formed on one side of the crankcase, so that the crankcase can be engaged or disengaged from the drive motor 2 while the piston assembly 32 is engaged with the drive motor 2. Therefore, the assembly difficulty is reduced and the work efficiency is improved, thereby enabling fast and precise operations, and further, easy maintenance.

[0205] In addition, while forcibly circulating external air into the crankcase and cylinder assembly 34 formed with a double-wall structure, the cylinder block 342 directly exhausts the heat generated in the cylinder assembly 34 to the outside, thereby maximizing the cooling performance.

[0206] In addition, a discharge movement restriction plate 352C is disposed on the upper part of the discharge valve plate 352B. The discharge movement restriction plate 352C supports the discharge valve plate 352B of the open flow path 351A and relieves the impact of the discharge valve plate 352B. Therefore, it can prevent the deformation and damage of the discharge valve plate 352B and minimize the noise generated when in contact with the discharge movement restriction plate 352C.

[0207] In addition, an intake movement restriction disc 353C is disposed on the upper part of the intake valve disc 353B. The intake movement restriction disc 353C supports the intake valve disc 353B with the open air supply hole 322A and relieves the impact of the intake valve disc 353B. Therefore, it can prevent the intake valve disc 353B from deforming and being damaged, and can minimize the noise generated when in contact with the intake movement restriction disc 353C.

[0208] The embodiments of the present invention have been described in more detail above with reference to the accompanying drawings. However, the present invention is not necessarily limited to these embodiments, and can be modified and implemented in various ways without departing from the scope of the technical concept of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical concept of the present invention but are for illustration, and the scope of the technical concept of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are exemplary and not limiting in all respects. The scope of protection of the present invention should be interpreted by the appended claims, and should be interpreted as including all technical concepts within the equivalent scope within the scope of the present invention.

[0209] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. A head module for an air compressor, comprising: A crankshaft that receives power from the outside and rotates; A piston assembly, the piston assembly including a connecting rod coupled to the crankshaft and a piston reciprocating by means of the connecting rod; A crank body, wherein the crank body internally houses the crankshaft; A cylinder assembly, which is coupled to and communicates with the crank body, and the piston is disposed inside the cylinder assembly; A valve unit, which is housed in the cylinder assembly, is configured to open and close in response to the reciprocating motion of the piston; A filter, incorporated in the cylinder assembly, filters air flowing into the cylinder assembly; and A cooling fan, coupled to the crankshaft and positioned at the end of the crank body, allows unfiltered air to flow into the interior of the crank body as the crankshaft rotates. The crank body includes: A first stroke space, the first stroke space accommodating the crankshaft, allows filtered air from the cylinder assembly to flow in; and A first heat dissipation space, isolated from the first travel space, is provided for the flow of unfiltered air entering through the cooling fan. The cylinder assembly includes: A second stroke space, which communicates with the first stroke space, accommodates the piston and the valve unit; and The second heat dissipation space is isolated from the second travel space and communicates with the first heat dissipation space, allowing unfiltered air passing through the first heat dissipation space to flow and be discharged to the outside.

2. The head module for an air compressor according to claim 1, wherein, The crank body includes: The inner shell is tubular, with the first travel space formed inside and an inner connecting hole formed on the outer surface to connect the first travel space and the second travel space. Foreign matter ingress prevention cover, which is attached to the end of the inner shell, closes the end of the inner shell and supports the crankshaft; The outer casing is tubular, surrounding the outer periphery of the inner casing. The interior of the outer casing forms the first heat dissipation space, and its outer surface has a mounting base that connects the first heat dissipation space and the second heat dissipation space and allows the cylinder assembly to be joined. One end of the outer casing is closed by the inner casing. A fan shroud, attached to the other end of the housing, protects the cooling fan disposed inside the housing from external influences. The fan shroud contains a spiral grille that converts unfiltered air flowing into the first heat dissipation space into a straight-flowing stream. The cylinder assembly includes: A cylinder liner, which communicates with the first stroke space and is disposed on the lower side of the valve unit, and the piston is slidably disposed inside the cylinder liner, forming a second stroke space between the piston and the valve unit; A cylinder body, a portion of which is connected to the inner connecting hole and surrounds the cylinder liner, and another portion of which is connected to the upper end of the mounting base with one side surface exposed to the outside, and an internally formed first heat dissipation hole communicating with the first heat dissipation space; and The cylinder head, which is attached to the upper end of the cylinder block to fix the valve unit, has a second heat dissipation hole formed inside, which communicates with the first heat dissipation hole. Unfiltered air flowing into the housing via the cooling fan passes sequentially through the first heat dissipation space, the first heat dissipation hole, and the second heat dissipation hole, expelling heat dissipated from the inner housing and the cylinder liner to the outside. The cylinder block is formed of a metal material that directly releases heat conducted from the cylinder liner to the outside.

3. The head module for an air compressor according to claim 2, wherein, The valve unit includes: A valve body is disposed between the cylinder liner and the cylinder head, and has at least one flow path formed inside it; A discharge valve, coupled to the valve body and configured such that: if the piston moves upward within the cylinder liner, the at least one flow path is opened by pressure; and if the piston moves downward within the cylinder liner, the flow path is closed by suction. An intake valve, coupled to the piston and configured such that: if the piston moves upward within the cylinder liner, at least one air supply port formed on the piston is closed by pressure; and if the piston moves downward within the cylinder liner, the at least one air supply port is opened by suction. The discharge valve includes: A discharge support bolt assembly, the discharge support bolt assembly comprising a discharge bolt body connected to the center of the valve body and a discharge bolt head disposed at the upper end of the discharge bolt body; A discharge valve disc is disposed between the discharge bolt head and the valve body. If the piston moves downward, the discharge valve disc is supported on the valve body to close the at least one flow path. If the piston moves upward, the discharge valve disc rises along the axial direction of the discharge bolt body to open the at least one flow path. A discharge movement limiting disc, which is coupled to the discharge bolt body and disposed on the upper part of the discharge valve disc, wherein if the discharge valve disc rises, the discharge movement limiting disc contacts the upper surface of the discharge valve disc to limit the movement of the discharge valve disc; and A discharge disc support member is attached to the outer surface of the discharge bolt body and supports the lower surface of the discharge movement limiting disc along the axial direction of the discharge bolt body to fix the discharge movement limiting disc. The intake valve includes: An intake support bolt assembly, comprising an intake bolt body connected to the center of the upper end of the piston and an intake bolt head disposed at the upper end of the intake bolt body; An intake valve disc is disposed between the intake bolt head and the piston. If the piston moves upward, the intake valve disc is supported on the piston to close the at least one air supply hole. If the piston moves downward, the intake valve disc rises along the axial direction of the intake bolt body to open the at least one air supply hole. An intake movement limiting disc, which is coupled to the intake bolt body and disposed on the upper part of the intake valve disc, wherein if the intake valve disc rises, the intake movement limiting disc contacts the top of the intake valve disc to limit the movement of the intake valve disc; and An intake disc support member is attached to the outer surface of the intake bolt body and supports the lower surface of the intake movement limiting disc along the axial direction of the intake bolt body to fix the intake movement limiting disc.

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