Energy-saving variable speed energy-saving air compressor

Abstract

The application provides an energy-saving variable-speed energy-saving air compressor, and relates to the technical field of air compressors. The energy-saving variable-speed energy-saving air compressor comprises a gas storage tank, a machine head, a rear frame assembly, a filter assembly, a high-pressure electromagnetic valve, a multifunctional frame, an extension assembly, a positioning assembly and a lock assembly. The lower part of the gas storage tank is provided with a wheel set and supporting feet. The rear frame assembly is arranged on the side of the gas storage tank close to the wheel set, and is used for providing supporting force in a vertical state and providing a protection function for the machine head. The filter assembly is arranged at the air inlet end of the machine head, and is used for filtering the entering air and back-flushing the filter element by using the high-pressure gas in the gas storage tank. The high-pressure electromagnetic valve is arranged on the outer side of the filter assembly. The multifunctional frame, the extension assembly, the positioning assembly and the lock assembly can not only be suitable for various use modes, but also can provide tool placing positions, so that the tools are prevented from being damaged by being stepped on by mistake, the pneumatic tools are convenient to replace and use, and the use site is ensured to be clean.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, specifically to an energy-saving variable speed air compressor. Background Technology

[0002] Air compressors are used to provide compressed air for operating pneumatic tools, such as nailing tools, sanders, and paint sprayers. Air compressors typically have wheel assemblies and handles for pushing and pulling; the handle works with the wheels to move the compressor unit. However, air compressor handles on the market are often fixed, significantly limiting their placement. This forces the pneumatic tools to be placed anywhere, making it easy for employees to step on or kick them, potentially damaging them and hindering on-site assembly and use.

[0003] In related technologies, such as an air compressor with announcement number CN106837739A, there is an air tank, a handle, a first positioning port, a second positioning port, and a positioning pin disposed on the handle. The handle has a first position and a second position. After the positioning pin is disengaged from the first positioning port, it can follow the handle to pivot to the second positioning port and be limited to the second positioning port to limit the handle to the second position. After the positioning pin is disengaged from the second positioning port, it can follow the handle to pivot to the first positioning port and be limited to the first positioning port to limit the handle to the first position.

[0004] The handle of the aforementioned air compressor can be adjusted to two positions to accommodate different types of air compressors. However, when changing pneumatic tools, such as replacing a nailing tool with a sanding tool, there is a lack of space to place the replaced pneumatic tool, which can easily cause damage to the pneumatic tool and is not conducive to on-site use. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy-saving variable speed air compressor, which solves the problem of the handle's single function being inconvenient for changing pneumatic tools.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving variable speed air compressor, comprising an air tank and a compressor head, wherein the lower part of the air tank is provided with a wheel assembly and support feet, including:

[0007] The rear frame assembly is located on the side of the air tank near the wheel assembly and is used to provide support in the vertical position and to protect the engine head.

[0008] A filter assembly is located at the air inlet of the machine head and is used to filter the incoming air and use the high-pressure gas in the air tank to backwash the filter element.

[0009] A high-pressure solenoid valve, located outside the filter assembly, is used to control the release of high-pressure gas from the gas storage tank.

[0010] A multi-functional frame is rotatably mounted on the side of the gas storage tank near the support legs, providing three frame states: upper position, middle position, and lower position.

[0011] Telescopic assembly, which is mounted on a multi-functional frame, is used to provide a handheld position with telescopic functionality;

[0012] A positioning component, which is mounted on the multi-functional frame, is used to fix the frame state of the multi-functional frame;

[0013] The locking assembly, located on the rear frame assembly, is used to lock the multi-functional frame in its current position. Through the inclusion of the multi-functional frame, telescopic assembly, positioning assembly, and locking assembly, the multi-functional frame not only adapts to various usage scenarios but also provides tool placement, preventing accidental damage from being stepped on, facilitating the replacement of pneumatic tools, and ensuring a clean work environment. The included filter assembly filters incoming air, making it suitable for dusty environments. Furthermore, high-pressure gas can backwash the filter element for cleaning, increasing the interval between filter replacements, reducing maintenance frequency, and improving ease of use.

[0014] Preferably, the rear frame assembly includes a horizontal frame, a connecting frame, and a rear support frame welded together as one piece.

[0015] Preferably, the filter assembly includes a filter housing, one end of which is fixedly connected to a connecting pipe, the connecting pipe communicating with the air inlet of the machine head, an abutment ring fixedly connected to the inner surface of the filter housing, filter holes evenly distributed on the filter housing, a filter cover threadedly connected to the end of the filter housing away from the connecting pipe, a pressing ring fixedly connected to the inner surface of the filter cover, a filter element provided between the abutment ring and the pressing ring, a flow divider for evenly distributing airflow provided inside the filter element, a pressure relief spring provided between the side of the flow divider near the connecting pipe and the filter housing; an external air pipe is provided inside the filter cover, one end of which is fixedly connected to an internal air pipe, the external air pipe extending into the flow divider and sealingly contacting its inner wall, and the other end of the external air pipe communicating with an air storage tank.

[0016] Preferably, the flow divider includes a flow divider cylinder with flow divider openings evenly distributed on its circumferential surface. A pressure relief plate is fixedly connected to one end of the flow divider cylinder near the connecting pipe. The pressure relief plate has an airflow channel. A contact post is fixedly connected to one side of the pressure relief plate near the flow divider cylinder. The pressure relief spring is located between the pressure relief plate and the filter shell. The inner air pipe extends into the flow divider cylinder and its end face is in sealed contact with the inner wall where the pressure relief plate is located.

[0017] Preferably, the filter element includes an outer ring, an inner ring, and a corrugated filter cartridge. A spring wire is fixedly connected to one side of the outer ring near the corrugated filter cartridge, and a protruding ring is fixedly connected to the spring wire. A pressing head is fixedly connected to one side of the inner ring near the corrugated filter cartridge, and the pressing head corresponds to the spring wire.

[0018] Preferably, the multi-functional frame includes symmetrically arranged and welded together diagonal bars, horizontal bars, and telescopic cylinders. The end of the diagonal bar away from the telescopic cylinder is rotatably connected to the gas storage tank, and an auxiliary handle is fixedly connected between the bottoms of the two telescopic cylinders.

[0019] Preferably, the telescopic assembly includes a telescopic rod slidably installed inside the telescopic cylinder, a radially movable locking pin slidably connected inside the telescopic rod, a locking spring provided at one end of the locking pin extending into the telescopic rod, the locking pin extending out of a preset hole in the telescopic cylinder under the action of the locking spring, and a hand handle fixedly connected to the upper part of the telescopic rod.

[0020] Preferably, the positioning component includes a positioning plate fixedly installed on the gas storage tank, a connecting column fixedly installed on the crossbar, and a positioning pin penetrating the crossbar. The positioning plate has a positioning hole, a contact sleeve is fixedly connected to the positioning pin, a tension spring is fixedly connected between the contact sleeve and the connecting column, and the positioning pin can be inserted into the positioning hole.

[0021] Preferably, the locking assembly includes a locking seat slidably disposed on a horizontal frame, a baffle fixedly connected to the upper part of the locking seat, a locking claw engaged with the locking seat, and the locking claw movably mounted on the horizontal frame.

[0022] This invention provides an energy-saving variable speed air compressor. It has the following beneficial effects:

[0023] 1. The present invention, through the design of a multi-functional frame, telescopic component, positioning component, and locking component, not only adapts to various usage modes, but also provides a tool placement position to prevent tools from being accidentally stepped on and damaged, facilitates the replacement of pneumatic tools, and ensures the cleanliness of the usage site.

[0024] 2. The present invention, through its filter components, can filter incoming air, making it suitable for dusty environments. Furthermore, it can use high-pressure gas to backwash the filter element, clean it, increase the interval between filter element replacements, reduce maintenance frequency, and improve ease of use.

[0025] 3. The air compressor of the present invention can reduce the number of filter elements used in the same engineering environment, save filter element costs, and save more energy when used. Attached Figure Description

[0026] Figure 1 This is a perspective view of the overall horizontal position of the present invention;

[0027] Figure 2 This is a perspective view of the overall horizontal position of the present invention.

[0028] Figure 3 This is a perspective view of the lower position of the overall horizontal orientation of the present invention;

[0029] Figure 4 This is a perspective view of the lower position of the overall vertical orientation of the present invention;

[0030] Figure 5 This is a cross-sectional perspective view of the filter component in this invention;

[0031] Figure 6 This is a perspective view of the flow divider in this invention;

[0032] Figure 7 This is a three-dimensional sectional view of the filter cover and filter shell in this invention.

[0033] Figure 8 This is a sectional perspective view of the filter element in this invention;

[0034] Figure 9 This is a perspective view of the contact state between the elastic wire and the extrusion head in this invention;

[0035] Figure 10 This is a perspective view of the rear frame assembly in this invention;

[0036] Figure 11 This is a perspective view of the telescopic component and the multi-functional frame in this invention;

[0037] Figure 12 This is a sectional perspective view of the connection state between the telescopic rod and the telescopic cylinder in this invention;

[0038] Figure 13 for Figure 12 Enlarged view of point A in the middle;

[0039] Figure 14 This is a perspective view of the positioning component in this invention;

[0040] Figure 15 This is a split perspective view of the positioning component in this invention;

[0041] Figure 16 This is a perspective view of the locking assembly in this invention;

[0042] Figure 17 This is a split perspective view of the locking assembly in this invention.

[0043] The components include: 1. Air tank; 2. Head unit; 3. Filter assembly; 4. Rear frame assembly; 5. Telescopic assembly; 6. Multi-functional frame; 7. Positioning assembly; 8. Locking assembly; 9. High-pressure solenoid valve; 101. Wheel set; 102. Support foot; 301. External air pipe; 302. Internal air pipe; 303. Filter cover; 3031. Compression ring; 304. Filter shell; 3041. Filter hole; 3042. Abutment ring; 305. Connecting pipe; 306. Pressure relief spring; 307. Filter element; 308. Flow divider; 3081. Flow divider cylinder; 3082. Flow divider port; 3083. Pressure relief plate; 3084. Contact post; 3085. 3071. Airflow channel; 3072. Outer ring; 3073. Corrugated filter cartridge; 3074. Inner ring; 3075. Spring wire; 3076. Extrusion head; 30777. Convex ring; 401. Horizontal frame; 402. Connecting frame; 403. Rear support frame; 501. Telescopic rod; 502. Hand handle; 503. Locking post; 504. Locking spring; 601. Diagonal rod; 602. Horizontal rod; 603. Secondary handle; 604. Telescopic cylinder; 701. Positioning plate; 702. Positioning hole; 703. Positioning pin; 704. Tension spring; 705. Connecting post; 706. Contact sleeve; 801. Baffle; 802. Locking claw; 803. Locking seat. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] like Figures 1-17 As shown, this embodiment of the invention provides an energy-saving variable speed air compressor, including an air tank 1 and a compressor head 2. The lower part of the air tank 1 is provided with a wheel assembly 101 and a support foot 102, including:

[0046] The wheel set 101 allows for easy overall movement. The wheel set 101 has two wheels and together with the support foot 102, it forms a stable support, making it convenient for the entire air compressor to be placed horizontally for use. The compressor head 2 can compress air and inject the compressed air into the air tank 1. The motor in the compressor head 2 is a servo motor, which can control the speed of the pump head and achieve energy saving.

[0047] refer to Figure 1 , Figure 10 The rear frame assembly 4 is located on the side of the air tank 1 near the wheel set 101 and is used to provide support in the vertical position and to protect the engine head 2. The rear frame assembly 4 includes a horizontal frame 401, a connecting frame 402 and a rear support frame 403 welded together.

[0048] The horizontal frame 401, connecting frame 402 and rear support frame 403 can be welded from round tubes, which have good strength and ensure that the rear frame assembly 4 as a whole can provide good support and protection for the air compressor as a whole.

[0049] refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 Filter assembly 3 is located at the air inlet end of the machine head 2 and is used to filter the incoming air and use the high-pressure gas in the air tank 1 to backwash the filter element.

[0050] Filter assembly 3 includes a filter housing 304, one end of which is fixedly connected to a connecting pipe 305, which communicates with the air inlet of the head unit 2. An abutment ring 3042 is fixedly connected to the inner surface of the filter housing 304. Filter holes 3041 are evenly distributed on the filter housing 304. A filter cover 303 is threadedly connected to the end of the filter housing 304 away from the connecting pipe 305. A pressing ring 3031 is fixedly connected to the inner surface of the filter cover 303. Abutment ring 3042 and pressing ring 3031 are positioned between them. The filter element 307 is provided, and a flow divider 308 for evenly distributing airflow is provided inside the filter element 307. A pressure relief spring 306 is provided between the side of the flow divider 308 near the connecting pipe 305 and the filter shell 304. An external air pipe 301 is provided inside the filter cover 303. One end of the external air pipe 301 is fixedly connected to an internal air pipe 302. The external air pipe 301 extends into the flow divider 308 and is in sealed contact with its inner wall. The other end of the external air pipe 301 is connected to the air storage tank 1. A high-pressure solenoid valve 9 is installed on the external air pipe 301.

[0051] Air from the external environment can enter the filter housing 304 through the filter hole 3041, and under the filtering action of the filter element 307, it enters the machine head 2 through the connecting pipe 305; the high-pressure solenoid valve 9 can control the opening and closing of the external air pipe 301 and can adapt to high-pressure environments.

[0052] During the backflushing cleaning operation, the high-pressure gas in the air tank 1 enters the inner air pipe 302 through the outer air pipe 301, and then is injected into the diverter 308 from the inner air pipe 302, overcoming the elastic force of the pressure relief spring 306. The high-pressure airflow blows radially from the inside to the outside towards the filter element 307, blowing out the dust and impurities filtered from the outer surface of the filter element 307 through the filter hole 3041, thus achieving the self-cleaning function, extending the service life of the filter element 307, saving the number of filter elements 307 used for the same service life, and saving the cost of replacing the filter element 307.

[0053] The diverter 308 includes a diverter cylinder 3081, with diverter ports 3082 evenly distributed on the circumferential surface of the diverter cylinder 3081. A pressure relief plate 3083 is fixedly connected to one end of the diverter cylinder 3081 near the connecting pipe 305. An airflow channel 3085 is provided on the pressure relief plate 3083. A contact post 3084 is fixedly connected to one side of the pressure relief plate 3083 near the diverter cylinder 3081. A pressure relief spring 306 is located between the pressure relief plate 3083 and the filter shell 304. An inner air pipe 302 extends into the diverter cylinder 3081 and its end face is sealed in contact with the inner wall where the pressure relief plate 3083 is located.

[0054] During the filtration process, the air entering through the filter hole 3041 and filter element 307 is blocked by the pressure relief plate 3083, and the air can only flow into the connecting pipe 305 through the airflow channel 3085, so that the outside air can enter the machine head 2.

[0055] Due to the elastic force of the pressure relief spring 306, the inner wall of the diverter cylinder 3081 near the pressure relief plate 3083 will seal against the end face of the inner air pipe 302, ensuring that external airflow will not enter the gas storage tank 1 from the diverter port 3082 and the inner air pipe 302, thus ensuring the stability of the gas filtration process. When high-pressure gas is injected from the inner air pipe 302, the pressure relief spring 306 will be pushed under the action of high pressure. The pressure relief spring 306 will be compressed and deformed, and there will be a gap between the inner air pipe 302 and the inner wall of the diverter cylinder 3081. By utilizing this gap, the airflow can enter the inner cavity of the diverter cylinder 3081 and can be blown out from the diverter port 3082, thus achieving the effect of backflushing and cleaning.

[0056] The filter element 307 includes an outer ring 3071, an inner ring 3073, and a corrugated filter cartridge 3072. A spring wire 3074 is fixedly connected to one side of the outer ring 3071 near the corrugated filter cartridge 3072. A protruding ring 3076 is fixedly connected to the spring wire 3074. A pressing head 3075 is fixedly connected to one side of the inner ring 3073 near the corrugated filter cartridge 3072. The pressing head 3075 corresponds to the spring wire 3074.

[0057] During filtration, when air passes through the corrugated filter cartridge 3072, the micropores of the cartridge itself can filter out impurities in the air. The air passes smoothly through the corrugated filter cartridge 3072. The corrugated filter cartridge 3072 can be made of various materials, such as paper, polyurethane, or metal mesh. The corrugated filter cartridge 3072 is formed in a wave shape, and the elastic wire 3074 extends into the wave-shaped cavity.

[0058] When the high-pressure gas injection into the inner air pipe 302 stops, due to the lack of high-pressure gas propulsion, the compressed and deformed pressure relief spring 306 returns to its original length. The pressure relief spring 306, through the pressure relief plate 3083, pushes the inner wall of the diverter cylinder 3081 back into sealed contact with the end face of the inner air pipe 302. The contact post 3084 on the pressure relief plate 3083 will collide with the inner ring 3073, causing the extrusion head 3075 on the inner ring 3073 to vibrate and move. The extrusion head 3075, using its inclined surface, can extrude pressure on the end face of the elastic wire 3074. The elastic wire 3074 then... The vibrating spring 3074 generates a small floating oscillation, and the convex ring 3076 on the elastic wire 3074 contacts the corrugated filter cartridge 3072. The vibration of the inner ring 3073 and the corrugated filter cartridge 3072 can further shake off the impurities on the outer surface of the corrugated filter cartridge 3072, improving the cleaning efficiency. The outer ring 3071 will not move due to the restriction of the pressing ring 3031. If the length of the corrugated filter cartridge 3072 is small, the vibration force will be transmitted to the pressing ring 3031, the filter cover 303, and the filter shell 304, which will also shake off the impurities in the filter holes 3041.

[0059] High-pressure solenoid valve 9 is located on the outside of filter assembly 3 and is used to control the release of high-pressure gas in gas storage tank 1.

[0060] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 11 The multi-functional frame 6 is rotatably mounted on the side of the gas tank 1 near the support foot 102, and is used to provide three frame states: upper position, middle position, and lower position. The multi-functional frame 6 includes a diagonal bar 601, a horizontal bar 602, and a telescopic cylinder 604 that are welded together symmetrically. The end of the diagonal bar 601 away from the telescopic cylinder 604 is rotatably connected to the gas tank 1, and a secondary handle 603 is fixedly connected between the bottoms of the two telescopic cylinders 604.

[0061] The diagonal brace 601 can rotate relative to the air tank 1, realizing the change of the frame state into three positions: upper position, middle position, and lower position. The upper position means that the multi-functional frame 6 is located at the top of the air tank 1; the middle position means that the multi-functional frame 6 is located at the front of the air tank 1; and the lower position means that the multi-functional frame 6 is located at the bottom of the air tank 1. The three frame states can be used for vertical and horizontal air compressors. The shape formed by the diagonal brace 601, the horizontal bar 602, and the telescopic cylinder 604 is a triangle, which ensures the stability of the multi-functional frame 6.

[0062] refer to Figure 1 , Figure 11 , Figure 12 , Figure 13Telescopic component 5 is mounted on multi-functional frame 6 and is used to provide a handheld position for telescopic function; telescopic component 5 includes telescopic rod 501 slidably installed in telescopic cylinder 604, and radially movable locking post 503 is slidably connected in telescopic rod 501. One end of locking post 503 extending into telescopic rod 501 is provided with locking spring 504. Under the action of locking spring 504, locking post 503 can extend out of the preset hole of telescopic cylinder 604. Hand handle 502 is fixedly connected to the upper part of telescopic rod 501.

[0063] When performing telescopic operations, considering that the conventional handheld position is low, the telescopic function of telescopic component 5 can be used to change the height of the handheld position, which is suitable for moving the air compressor or placing pneumatic tools.

[0064] During the telescopic operation, press the locking pin 503, which compresses the locking spring 504. The locking pin 503 slides into the preset hole of the telescopic cylinder 604. Then, move the telescopic rod 501. When the telescopic rod 501 moves the locking pin 503 to the new preset hole, due to the lack of restriction from the telescopic cylinder 604, the locking pin 503 can be pushed back into the preset hole under the elastic force of the locking spring 504, thus fixing the telescopic rod 501 in the new position. There can be multiple preset holes, such as two, one at the top and one at the bottom. During the telescopic process, only the upper preset hole is extended and the lower preset hole is retracted. Alternatively, an appropriate number of preset holes can be selected according to actual needs.

[0065] refer to Figure 1 , Figure 14 , Figure 15 The positioning component 7 is mounted on the multi-functional frame 6 and is used to fix the frame state of the multi-functional frame 6. The positioning component 7 includes a positioning plate 701 fixedly installed on the gas storage tank 1, a connecting column 705 fixedly installed on the crossbar 602, and a positioning pin 703 penetrating the crossbar 602. The positioning plate 701 is provided with a positioning hole 702. A contact sleeve 706 is fixedly connected to the positioning pin 703. A tension spring 704 is fixedly connected between the contact sleeve 706 and the connecting column 705. The positioning pin 703 can be inserted into the positioning hole 702.

[0066] During positioning, due to the tension of the tension spring 704, the positioning pin 703 will pass through the crossbar 602 and insert into the corresponding positioning hole 702. When it is necessary to change the state, hold the positioning pin 703 and overcome the elasticity of the tension spring 704 to pull the positioning pin 703 away from the crossbar 602. Without the restriction of the positioning pin 703, the diagonal bar 601 can rotate, changing the frame state of the multi-functional frame 6. The operation is simple.

[0067] refer to Figure 2 , Figure 16 , Figure 17The locking assembly 8 is located on the rear frame assembly 4 and is used to lock the multi-functional frame 6 in the upper position frame state; the locking assembly 8 includes a locking seat 803 slidably mounted on the horizontal frame 401, a baffle 801 fixedly connected to the upper part of the locking seat 803, and a locking claw 802 engaged on the locking seat 803, the locking claw 802 being movably mounted on the horizontal frame 401;

[0068] When the multi-functional frame 6 is in the upper position, rotate the locking claw 802 to disengage it from the locking seat 803. The locking claw 802 can then lock the telescopic rod 501, allowing the telescopic rod 501 to be integrated with the rear frame assembly 4. Pneumatic tools can then be placed on the telescopic rod 501. If a large number of pneumatic tools need to be placed, the locking seat 803 and the baffle 801 can be moved towards the connecting frame 402. The baffle 801 extends out of the horizontal frame 401, thus increasing the number of pneumatic tool placement positions. Various types of pneumatic tools are available, such as pneumatic wrenches, nail guns, and blow guns. In addition, in this state, the auxiliary handle 603 can also be used as a spare handheld position for convenient movement and use of the air compressor.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving variable speed air compressor, comprising an air tank (1) and a compressor head (2), wherein the lower part of the air tank (1) is provided with a wheel assembly (101) and support feet (102), characterized in that, include: The rear frame assembly (4) is located on the side of the air tank (1) near the wheel assembly (101) and is used to provide support in the vertical position and to provide protection for the machine head (2). The filter assembly (3) is located at the air inlet of the machine head (2) and is used to filter the incoming air and use the high-pressure gas in the air tank (1) to backwash the filter element. The filter assembly (3) includes a filter housing (304), one end of which is fixedly connected to a connecting pipe (305), which is connected to the air inlet of the machine head (2). An abutment ring (3042) is fixedly connected to the inner surface of the filter housing (304). Filter holes (3041) are evenly provided on the filter housing (304). A filter cover (303) is threadedly connected to the end of the filter housing (304) away from the connecting pipe (305). A pressing ring (3031) is fixedly connected to the inner surface of the filter cover (303). The abutment ring (3042)... A filter element (307) is provided between the filter element (307) and the pressure ring (3031). A flow divider (308) for evenly distributing airflow is provided inside the filter element (307). A pressure relief spring (306) is provided between the side of the flow divider (308) near the connecting pipe (305) and the filter shell (304). An external air pipe (301) is provided inside the filter cover (303). An internal air pipe (302) is fixedly connected to one end of the external air pipe (301). The external air pipe (301) extends into the flow divider (308) and is in sealed contact with its inner wall. The other end of the external air pipe (301) is connected to the air storage tank (1). The diverter (308) includes a diverter cylinder (3081), on which diverter ports (3082) are evenly distributed. A pressure relief plate (3083) is fixedly connected to one end of the diverter cylinder (3081) near the connecting pipe (305). An airflow channel (3085) is provided on the pressure relief plate (3083). A contact post (3084) is fixedly connected to one side of the pressure relief plate (3083) near the diverter cylinder (3081). A pressure relief spring (306) is located between the pressure relief plate (3083) and the filter shell (304). The inner air pipe (302) extends into the diverter cylinder (3081) and its end face is sealed in contact with the inner wall where the pressure relief plate (3083) is located. The filter element (307) includes an outer ring (3071), an inner ring (3073), and a corrugated filter cartridge (3072). A spring wire (3074) is fixedly connected to one side of the outer ring (3071) near the corrugated filter cartridge (3072). A protruding ring (3076) is fixedly connected to the spring wire (3074). A pressing head (3075) is fixedly connected to one side of the inner ring (3073) near the corrugated filter cartridge (3072). The pressing head (3075) corresponds to the spring wire (3074). High-pressure solenoid valve (9), which is located on the outside of the filter assembly (3), is used to control the release of high-pressure gas in the gas storage tank (1); Multifunctional frame (6), which is rotatably mounted on the side of the gas storage tank (1) near the support foot (102) to provide three frame states: upper position, middle position and lower position; Telescopic component (5), which is mounted on the multi-functional frame (6) and is used to provide a handheld position for telescopic function; Positioning component (7), which is mounted on the multi-functional frame (6) and is used to fix the frame state of the multi-functional frame (6); Locking assembly (8), which is located on the rear frame assembly (4), is used to lock the multi-functional frame (6) in the upper position frame state.

2. The energy-saving variable speed air compressor according to claim 1, characterized in that: The rear frame assembly (4) includes a horizontal frame (401), a connecting frame (402), and a rear support frame (403) welded together.

3. The energy-saving variable speed air compressor according to claim 1, characterized in that: The multi-functional frame (6) includes a diagonal bar (601), a horizontal bar (602), and a telescopic cylinder (604) that are symmetrically arranged and welded together. The end of the diagonal bar (601) away from the telescopic cylinder (604) is rotatably connected to the gas tank (1). A secondary handle (603) is fixedly connected between the bottoms of the two telescopic cylinders (604).

4. The energy-saving variable speed air compressor according to claim 3, characterized in that: The telescopic assembly (5) includes a telescopic rod (501) slidably installed inside the telescopic cylinder (604). A radially movable locking pin (503) is slidably connected inside the telescopic rod (501). A locking spring (504) is provided at one end of the locking pin (503) that extends into the telescopic rod (501). The locking pin (503) can extend out of the preset hole of the telescopic cylinder (604) under the action of the locking spring (504). A hand handle (502) is fixedly connected to the upper part of the telescopic rod (501).

5. The energy-saving variable speed air compressor according to claim 3, characterized in that: The positioning component (7) includes a positioning plate (701) fixedly installed on the gas storage tank (1), a connecting column (705) fixedly installed on the crossbar (602), and a positioning pin (703) passing through the crossbar (602). The positioning plate (701) is provided with a positioning hole (702). A contact sleeve (706) is fixedly connected to the positioning pin (703). A tension spring (704) is fixedly connected between the contact sleeve (706) and the connecting column (705). The positioning pin (703) can be inserted into the positioning hole (702).

6. The energy-saving variable speed air compressor according to claim 2, characterized in that: The locking assembly (8) includes a locking seat (803) slidably disposed on a horizontal frame (401), a baffle (801) is fixedly connected to the upper part of the locking seat (803), and a locking claw (802) is engaged on the locking seat (803), and the locking claw (802) is movably installed on the horizontal frame (401).

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