A micro portable air compressor

Abstract

The utility model discloses a kind of mini portable air compressor, including cover, gas tank, battery and controller.The cover is by lower cover and the upper cover of buckling with it constitute, limit structure is equipped in lower cover, air cylinder and electromagnetic valve are provided in cover, switch is equipped in cover outer wall.The gas tank is installed in lower cover and is limited by limit structure;Pressure sensor and functional components are equipped on gas tank, and the upper cover is equipped with the opening hole corresponding with functional components, so that functional components and opening hole are attached.Mentioned battery includes independent plug core structure, and is limited fixed by upper and lower cover buckling.The controller is electrically connected with battery, output end is electrically connected with machine head and electromagnetic valve respectively, and is connected with switch and / or pressure sensor signal, to control machine head and electromagnetic valve stop working when switch or pressure sensor circuit is broken, and battery insertion needs to be started machine head after switch buckling. Above-mentioned air compressor structure is compact, convenient to carry and maintain, and have higher security.

Description

Technical Field

[0001] This utility model relates to the field of air compression equipment technology, and in particular to a miniature portable air compressor. Background Technology

[0002] Air compressors, as devices that convert electrical energy into compressed air energy, are widely used in pneumatic tool driving, gas transportation, and small-scale air filling applications. Existing portable air compressors typically employ a vertically mounted compressor head structure, resulting in a large overall footprint and hindering miniaturization and compact design. Furthermore, traditional air compressors mostly use separate air tanks, connected to components such as quick-connect fittings, pressure gauges, and safety valves via external piping. This not only occupies significant space but also leads to dispersed component placement, making them inconvenient to carry.

[0003] Furthermore, the batteries in existing devices are mostly fixed inside the casing, making disassembly and replacement difficult once damaged or degraded, increasing maintenance costs. Regarding the control circuitry, some portable air compressors may directly start the compressor when the battery is inserted, posing a safety hazard.

[0004] Therefore, existing miniature air compressors generally suffer from problems such as large size, loose layout, scattered air tanks and components, difficulty in battery replacement, and insufficient safety. There is an urgent need for a miniature portable air compressor that is compact, easy to maintain, and safer. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a compact, easy-to-maintain, and safer miniature portable air compressor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A miniature portable air compressor includes a housing, an air tank, a battery, and a controller. The housing includes a lower shell and an upper shell that fastens to it, with a limiting structure inside the lower shell. A compressor head and a solenoid valve are located inside the housing, and a switch and a handle are located on the outer wall of the housing. The air tank is installed inside the lower shell and is limited by the limiting structure, allowing the air tank to move and be positioned during installation. A pressure sensor is installed on the air tank. A functional component is located on the air tank, and an opening corresponding to the functional component is provided on the upper shell. The air tank moves and positions itself so that the functional component fits into the opening. The battery includes an independent insert structure, which is located inside the housing and fixed by the fastening of the upper and lower shells. The controller is electrically connected to the battery, and its output is electrically connected to the compressor head and the solenoid valve. The controller is also connected to the switch and / or the pressure sensor signal, so that when the switch or pressure sensor is in an open-circuit state, the compressor head and the solenoid valve simultaneously stop working. When the battery is powered on and inserted, the compressor head can only be started after the switch is closed.

[0008] Further, the limiting structure includes a limiting notch and a kidney-shaped hole arranged in the lower shell along the axial direction of the air tank. The fixing member at the bottom of the air tank is slidably connected to the lower shell through the kidney-shaped hole and is circumferentially limited by the limiting notch.

[0009] Further, the functional components are a pressure gauge, or a safety valve, or a combination of both. The pressure gauge and the safety valve are respectively connected to the inner cavity of the air tank through air paths and are arranged on one side of the upper end face of the air tank facing the upper shell. Their outer sides are hermetically butted with the corresponding openings of the upper shell, and the reading surface of the pressure gauge or the valve body of the safety valve faces the outside of the upper shell.

[0010] Further, the volume of the air tank is 0.4L - 0.6L. The air tank is located in the lower shell and is arranged side by side with the machine head in the left-right direction.

[0011] Further, an integrated mounting seat communicating with the inner cavity of the air tank is provided on the outer surface of the air tank. A quick connector, a one-way valve, and a pressure sensor are installed on the integrated mounting seat; the quick connector is located on the external connection side corresponding to the opening of the upper shell to connect with an external air path, the one-way valve is arranged on the air path between the air tank and the solenoid valve, and the signal end of the pressure sensor is electrically connected to the signal input end of the controller.

[0012] Further, mounting holes for fixing the machine head are provided on the right side wall of the lower shell. The machine head is fixedly connected to the lower shell through fasteners via the mounting holes.

[0013] Further, the machine head is arranged in the right side area of the lower shell and its rotation axis is horizontally arranged, and is oppositely arranged with the air tank in the left-right direction.

[0014] Further, the battery is arranged in the battery compartment jointly defined by the upper shell and the lower shell. The output end of the battery is electrically connected to the input end of the controller through a plug-in connector, and the wire is routed along the inner wall of the lower shell to the controller.

[0015] Further, the controller is installed on one side of the lower shell close to the air tank. Its electric power output end is electrically connected to the machine head through a wire to provide three-phase power to the machine head.

[0016] The machine head of the above-mentioned micro portable air compressor is horizontally arranged, and the air tank and the machine head are compactly arranged in the housing, with high overall space utilization rate, which is convenient for carrying and storage; the air tank is installed through a limiting structure and integrates components such as a quick connector, a pressure gauge, a safety valve, a one-way valve, and a pressure sensor, reducing external pipeline connections and making the device structure more compact; the battery adopts an independent plug-in core structure and is limited and fixed by the cooperation of the upper and lower shells, which is convenient for disassembly and replacement, improving the maintenance convenience; the controller realizes linkage control through a switch and a pressure sensor. When the battery is inserted, the machine head can only be started after the switch is closed, avoiding potential safety hazards caused by sudden power-on. Description of the Drawings

[0017] Figure 1This is a schematic diagram of the overall structure of the air compressor provided by this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of an air compressor provided by this utility model. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 and Figure 2 As shown, this application provides a miniature portable air compressor, which includes a housing 1, an air tank 2, a battery 3, and a controller 4.

[0021] Specifically, the housing 1 includes a lower housing 11 and an upper housing 12 that fastens thereto. A limiting structure is provided inside the lower housing 11. The housing 1 contains a machine head 5 and a solenoid valve 6, and a switch 13 and a handle 14 are provided on the outer wall of the housing 1. The gas tank 2 is installed inside the lower housing 11 and is limited by the limiting structure, allowing the gas tank 2 to move and be positioned during installation. A pressure sensor 9 is provided on the gas tank 2, which monitors the gas pressure inside the gas tank 2 in real time and feeds the signal back to the controller 4. Functional components are provided on the gas tank 2, and the upper housing 12 has openings corresponding to these functional components, allowing the gas tank 2 to pass through... The moving positioning makes the functional components fit into the opening; the battery 3 includes an independent insert structure 31, which is set inside the cover 1 and is limited and fixed by the fastening of the upper shell 12 and the lower shell 11; the controller 4 is electrically connected to the battery 3, and the output end of the controller 4 is electrically connected to the machine head 5 and the solenoid valve 6 respectively. The controller 4 is also connected to the switch 13 and / or the pressure sensor 9 to control the machine head 5 and the solenoid valve 6 to stop working simultaneously when the switch 13 or the pressure sensor 9 is in the open circuit state. When the battery 3 is plugged in, the machine head 5 can only be started after the switch 13 is closed.

[0022] The above design achieves the advantages of a compact overall structure and high functional integration. In particular, the movable positioning of the gas tank 2, combined with the perforated design, simplifies the assembly process while improving sealing and visual readability. The use of a plug-in battery 3 significantly enhances maintenance convenience, allowing users to quickly replace the power module. The safety logic of the controller 4 avoids the risk of immediate startup upon battery insertion, enhancing operational safety. The integrated handle 14 on the casing makes the device more convenient to move or carry, improving the user experience.

[0023] The limiting structure includes a limiting slot and a waist hole arranged axially along the gas tank 2 within the lower shell 11. The fixing member at the bottom of the gas tank 2 is slidably connected to the lower shell 11 via the waist hole and is circumferentially limited by the limiting slot. This limiting structure design simplifies the assembly and disassembly process of the gas tank 2, allowing users to complete the positioning operation without the need for additional tools when maintaining or replacing the gas tank 2. The combination of the limiting slot and the waist hole allows the gas tank 2 to slide freely during the initial installation phase, improving assembly flexibility, while providing a firm restraint after positioning, enhancing the reliability and safety of equipment operation. Furthermore, this structure facilitates mass production and modular design, reducing manufacturing and maintenance costs.

[0024] The functional components are a pressure gauge, a safety valve, or a combination of both. The pressure gauge and safety valve are connected to the inner cavity of the air tank 2 via air passages and are positioned on the upper surface of the air tank 2 facing the upper housing 12. Their outer sides are sealed and connected to the corresponding openings of the upper housing 12, with the reading surface of the pressure gauge or the valve body of the safety valve facing outwards from the upper housing 12. This arrangement improves the visibility and safety of the air compressor, allowing users to directly read pressure values ​​or check the status of the safety valve through an external window, effectively enhancing operational efficiency and safety protection capabilities. The sealed fit design between the functional components and the openings of the upper housing 12 not only avoids the risk of internal pressure leakage but also achieves the advantages of integrated structure and strong sealing.

[0025] The volume of gas tank 2 is 0.4L to 0.6L. While meeting the basic air pressure output capacity, the size of gas tank 2 is significantly reduced, which helps to control the overall size and weight of the machine and improves portability. Gas tank 2 is located inside the lower shell 11 and is arranged side by side with the head 5 in the left-right direction, which effectively avoids heat dissipation problems and mutual interference problems caused by space stacking, thereby improving the stability and reliability of system operation.

[0026] An integrated mounting base communicating with the inner cavity of the gas tank 2 is provided on the outer surface of the tank. A quick-connect coupling 7, a one-way valve 8, and a pressure sensor 9 are mounted on the integrated mounting base. The quick-connect coupling 7 is located on the external side corresponding to the opening in the upper shell 12 for connection to the external gas path. The one-way valve 8 is located in the gas path between the gas tank 2 and the solenoid valve 6. The signal terminal of the pressure sensor 9 is electrically connected to the signal input terminal of the controller 4. The integrated mounting base design effectively reduces the number of gas path connection points and the length of the conduit, improving system sealing and structural compactness. The centralized placement of key gas paths and sensing components simplifies the manufacturing and assembly process, improving production efficiency and system stability. The quick-connect coupling 7 interface is located in an easily accessible position, significantly improving user convenience. The addition of the one-way valve 8 enhances the safety and efficiency of system operation, preventing gas backflow that could cause the compressor head 5 to reverse or the solenoid valve 6 to malfunction. The electrical connection between the pressure sensor 9 and the controller 4 forms a closed-loop feedback control system, improving the automation level and safety protection capabilities of the equipment.

[0027] The right side wall of the lower housing 11 is provided with mounting holes for fixing the machine head 5. The machine head 5 is fixedly connected to the lower housing 11 through the mounting holes by fasteners, which enhances the structural stability and vibration suppression capability of the machine head 5 and avoids noise or malfunction caused by loosening or displacement during operation. The use of fastener connection method makes it easy for users to quickly disassemble and replace the machine head 5 or upgrade parts in the later stage, reducing the difficulty of maintenance and maintenance costs.

[0028] The compressor head 5 is located on the right side of the lower housing 11 with its axis of rotation arranged horizontally, and is positioned opposite the gas tank 2 in the left-right direction. This symmetrical arrangement of the compressor head 5 and the gas tank 2 optimizes the internal structure of the lower housing 11, improving the overall space utilization and mechanical stability. Simultaneously, this lateral configuration facilitates the integrated design of the compressor head 5 with the motor, air circuit interface, and electrical connections, resulting in a more compact overall structure.

[0029] Battery 3 is housed within a battery compartment defined by the upper shell 12 and the lower shell 11. The output terminal of battery 3 is electrically connected to the input terminal of controller 4 via a connector, and the wires are routed along the inner wall of the lower shell 11 to controller 4. By integrating the battery compartment between the upper and lower shells 11, battery 3 achieves both good stability and ease of installation, removal, and replacement, significantly improving the maintainability of the equipment and the efficiency of battery replacement. The connector connection method enhances the reliability and convenience of electrical connections, reducing the risk of malfunctions caused by poor contact.

[0030] The controller 4 is installed inside the lower housing 11 on the side near the gas tank 2, which facilitates a short-path connection between the controller 4 and the pressure monitoring components (such as the pressure sensor 9) and the power supply (such as the battery 3), thereby simplifying the internal wiring. The electric power output terminal of the controller 4 is electrically connected to the machine head 5 via a wire to provide three-phase power to the machine head 5.

[0031] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A miniature portable air compressor, characterized in that, Includes a housing (1), a gas tank (2), a battery (3), and a controller (4); The cover (1) includes a lower shell (11) and an upper shell (12) that is fastened to it. The lower shell (11) is provided with a limiting structure. The cover (1) is provided with a machine head (5) and a solenoid valve (6). The outer wall of the cover (1) is provided with a switch (13) and a handle (14). The gas tank (2) is installed inside the lower shell (11) and is limited by the limiting structure, so that the gas tank (2) can move and be positioned during installation; a pressure sensor (9) is provided on the gas tank (2). The gas tank (2) is provided with functional components, and the upper shell (12) is provided with openings corresponding to the functional components. The gas tank (2) is moved and positioned so that the functional components fit into the openings. The battery (3) includes an independent insert structure (31), which is disposed inside the cover (1) and is fixed by the fastening of the upper shell (12) and the lower shell (11); The controller (4) is electrically connected to the battery (3). The output of the controller (4) is electrically connected to the machine head (5) and the solenoid valve (6) respectively. The controller (4) is also connected to the switch (13) and / or the pressure sensor (9) to control the machine head (5) and the solenoid valve (6) to stop working simultaneously when the switch (13) or the pressure sensor (9) is in the open circuit state. The machine head (5) can only be started after the switch (13) is closed when the battery (3) is plugged in.

2. The miniature portable air compressor according to claim 1, characterized in that, The limiting structure includes a limiting slot and a waist hole arranged in the lower shell (11) along the axial direction of the gas tank (2). The fixing member at the bottom of the gas tank (2) is slidably connected to the lower shell (11) through the waist hole and is limited in the circumferential direction by the limiting slot.

3. The miniature portable air compressor according to claim 1, characterized in that, The functional component is a pressure gauge, a safety valve, or a combination of both. The pressure gauge and the safety valve are respectively connected to the inner cavity of the gas tank (2) through the gas passage and are arranged on the side of the upper end face of the gas tank (2) facing the upper shell (12). Their outer sides are sealed and connected with the corresponding openings of the upper shell (12), and the reading surface of the pressure gauge or the valve body of the safety valve faces the outer side of the upper shell (12).

4. The miniature portable air compressor according to claim 1, characterized in that, The volume of the gas tank (2) is 0.4L to 0.6L. The gas tank (2) is located inside the lower shell (11) and is arranged side by side with the machine head (5) in the left and right direction.

5. The miniature portable air compressor according to claim 1, characterized in that, The outer surface of the gas tank (2) is provided with an integrated mounting base that communicates with the inner cavity of the gas tank (2). The integrated mounting base is equipped with a quick connector (7), a one-way valve (8) and the pressure sensor (9). The quick connector (7) is located on the outer side corresponding to the opening of the upper shell (12) to connect with the external air circuit. The one-way valve (8) is set in the air circuit between the gas tank (2) and the solenoid valve (6). The signal end of the pressure sensor (9) is electrically connected to the signal input end of the controller (4).

6. The miniature portable air compressor according to claim 1, characterized in that, The right side wall of the lower shell (11) is provided with mounting holes for fixing the machine head (5), and the machine head (5) is fixedly connected to the lower shell (11) through the mounting holes by fasteners.

7. The miniature portable air compressor according to claim 1, characterized in that, The machine head (5) is located on the right side of the lower shell (11) with its rotation axis arranged horizontally and is positioned opposite the gas tank (2) in the left-right direction.

8. The miniature portable air compressor according to claim 1, characterized in that, The battery (3) is located in the battery compartment defined by the upper shell (12) and the lower shell (11). The output end of the battery (3) is electrically connected to the input end of the controller (4) through a connector, and the wire is routed along the inner wall of the lower shell (11) to the controller (4).

9. The miniature portable air compressor according to claim 1, characterized in that, The controller (4) is installed inside the lower shell (11) on the side near the gas tank (2), and its electric power output terminal is electrically connected to the machine head (5) through a wire to provide three-phase power to the machine head (5).

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