CN212717052U

CN212717052U - Miniature high-pressure air compressor with vehicle-mounted and household dual-power systems

Info

Publication number: CN212717052U
Application number: CN202020893357.8U
Authority: CN
Inventors: 罗东
Original assignee: Dongguan New Warrior Mechanical And Electrical Equipment Co ltd
Current assignee: Dongguan New Warrior Mechanical And Electrical Equipment Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-03-16
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a miniature high-pressure air compressor with on-vehicle and domestic double dynamical system, including master control IC, power change over switch, switching power supply, direct current electrical interface, alternating current interface and air compression system, air compression system includes driving motor, and power change over switch and driving motor are connected with master control IC electricity, and direct current electrical interface and switching power supply are connected with the power change over switch electricity, and alternating current electrical interface is connected with the switching power supply electricity. The utility model discloses can use alternating current power supply drive also can use direct current power supply drive, improve miniature high-pressure air compressor's use flexibility.

Description

Miniature high-pressure air compressor with vehicle-mounted and household dual-power systems

Technical Field

The utility model relates to an air compressor technical field especially relates to a miniature high-pressure air compressor with on-vehicle and domestic double dynamical system.

Background

At present, most of miniature high-pressure air compressors on the market are driven by an alternating current power supply (for household) or driven by a direct current (for vehicle-mounted), do not have a dual-drive (for vehicle-mounted/for household) power system compatible with the alternating current power supply and the direct current power supply, and limit the use flexibility of equipment.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a miniature high-pressure air compressor with on-vehicle and domestic dual power system, it can use alternating current power supply drive (domestic) also can use direct current power supply drive (on-vehicle), has improved the use flexibility.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides a miniature high-pressure air compressor with on-vehicle and domestic double dynamical system, includes master control IC, power change over switch, switching power supply, direct current electrical interface, alternating current electrical interface and air compression system, air compression system include driving motor, power change over switch reaches driving motor with master control IC electricity is connected, direct current electrical interface reaches switching power supply with power change over switch electricity is connected, alternating current electrical interface with the switching power supply electricity is connected.

Further, miniature high-pressure air compressor still includes quick-witted case, first pressure sign indicating number and the fan of being connected with master control IC electricity, first pressure sign indicating number includes base plate, two connecting plates and sets up the clamp plate between two connecting plates, switching power supply is located between two connecting plates, the clamp plate is located the base plate orientation one side of switching power supply will switching power supply presses one side of quick-witted case, switching power supply with be formed with the ventilation chamber between the base plate, the base plate is provided with the intercommunication the fresh air inlet in ventilation chamber, the fan is installed the base plate dorsad switching power supply just corresponds on the position of fresh air inlet.

Further, the two connecting plates are respectively located on two sides of the base plate and fixedly connected with the case through screws, the number of the pressing plates is two, the pressing plates are respectively located on two opposite sides of the two connecting plates, the two connecting plates are respectively provided with a first heat dissipation hole and a second heat dissipation hole, the first heat dissipation holes are communicated with the ventilation cavities, the first heat dissipation holes are located between the pressing plates and the base plate, and the second heat dissipation holes are located on two sides of the switching power supply.

Further, miniature high-pressure air compressor still includes quick-witted case, car fuse socket, car fuse inserted sheet and second and presses the sign indicating number, car fuse socket sets up quick-witted incasement and be used for being connected with the master control IC electricity, car fuse inserted sheet embeds there is the fuse, the second press the sign indicating number with quick-witted case fixed connection is used for pushing down car fuse socket, quick-witted case is provided with the through-hole, so that car fuse inserted sheet can be followed the outside warp of quick-witted case the through-hole inserts car fuse socket.

Further, the sign indicating number orientation is pressed to the second one side of through-hole is provided with the opening, car fuse socket is including being located main pedestal in the sign indicating number is pressed to the second and being located main pedestal one side stretches out open-ended butt joint portion, butt joint portion is used for inserting car fuse inserted sheet, the second is pressed the sign indicating number including being used for the lid on the car fuse socket apron, set up in the curb plate of apron one side and set up in two pressure arms of apron opposite side, the opening is located between two pressure arms, main pedestal presss from both sides the curb plate with press between the arm.

Further, the power supply change-over switch is a ship-shaped switch, the ship-shaped switch comprises a control box, a ship-shaped button and three pairs of terminals, the control box is provided with an installation cavity, one end of the terminal is fixed in the installation cavity, the other end of the terminal extends out of the control box, the three pairs of terminals comprise a pair of common terminals and two pairs of switching terminals positioned at two sides of the common terminals, the boat-shaped button is provided with three pairs of contacts, the three pairs of contacts comprise a pair of common contacts and two pairs of switching contacts positioned at two sides of the common contacts, the common contacts are communicated with the common terminals, when one pair of switching contacts and one pair of switching terminals are in an on state, the other pair of switching contacts and the other pair of switching terminals are in an off state, the direct current interface is used for being electrically connected with one pair of switching terminals, and the switching power supply is used for being electrically connected with the other pair of switching terminals.

Further, the boat-shaped button is located at the top of the control box, the terminals extend out to the lower portion of the control box, a partition is arranged at the bottom of the control box, the three pairs of terminals are arranged in an array mode along the extending direction of the partition, and each pair of terminals is separated by the partition.

Furthermore, the air compression system also comprises a transmission device, a secondary compression device and a pressure cylinder, the miniature high-pressure air compressor also comprises a case and a pressure relief seat communicated with the secondary compression device, the pressure relief seat comprises a pressure relief seat main body, a quick-connection male head, an explosion-proof screw, a first pressure relief valve, a drain pipe and an adjustable pressure gauge, the adjustable pressure gauge is electrically connected with the main control IC, the pressure relief seat main body is arranged in the case, the blow-off pipe extends to the lower part of the case, the pressure cylinder is provided with an air inlet one-way valve, an air outlet one-way valve, a safety valve and a second pressure relief valve, the second pressure release valve is positioned at the bottom end of the pressure cylinder, the first pressure release valve and the second pressure release valve are both provided with knobs, the knob of the first pressure release valve is located on the outer side face of the case, and the knob of the second pressure release valve is located below the case.

Further, the miniature high-pressure air compressor also comprises a control mainboard, a reset switch, a current detection IC, a buzzer, a temperature sensor and a digital display tube, wherein the master control IC, the reset switch, the current detection IC, the buzzer, the temperature sensor and the digital display tube are all installed on the control mainboard.

Furthermore, the miniature high-pressure air compressor further comprises a case and a support, the air compression system and the switch power supply are both arranged in the case, the switch power supply is installed at the top of the case, the air compression system is installed at the bottom of the case, one end of the switch power supply is fixedly connected with the case, the other end of the switch power supply is fixedly connected with the case through the support, and the support is located at the bottom end of the switch power supply so that a wiring space is formed between the other end of the switch power supply and the case.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a miniature high-pressure air compressor with on-vehicle and domestic dual-power system, it has direct current electrical interface, alternating current electrical interface and power change over switch, therefore can support two kinds of power input simultaneously and can switch over the required power through power change over switch; the miniature high-pressure air compressor can be driven by an alternating current power supply (for household) and a direct current power supply (for vehicle-mounted), and the use flexibility is improved.

Drawings

FIG. 1 is a schematic structural view of a micro high-pressure air compressor with a dual power system for vehicle and household according to an embodiment of the present invention;

FIG. 2 is an internal structural view of the micro high pressure air compressor shown in FIG. 1;

FIG. 3 is an internal structure view of the micro high pressure air compressor shown in FIG. 1 from another perspective;

FIG. 4 is a schematic view illustrating an installation of a switching power supply of the micro high pressure air compressor shown in FIG. 1;

FIG. 5 is a schematic structural diagram of a first compression member of the micro high pressure air compressor shown in FIG. 1;

FIG. 6 is a schematic view of an automobile fuse socket and an automobile fuse of the micro high pressure air compressor shown in FIG. 1;

FIG. 7 is an assembly view of the car fuse socket, the car fuse and the second weight of the micro high pressure air compressor shown in FIG. 1;

FIG. 8 is a schematic structural view of a second compression member of the micro high pressure air compressor shown in FIG. 1;

FIG. 9 is a schematic structural diagram of a power switch of the high pressure micro air compressor shown in FIG. 1;

FIG. 10 is a schematic structural diagram of another view angle of a power switch of the micro high pressure air compressor shown in FIG. 1;

FIG. 11 is an internal structure view of a power switch of the micro high pressure air compressor shown in FIG. 1;

FIG. 12 is a schematic view illustrating an installation of a pressure relief seat of the micro high pressure air compressor shown in FIG. 1;

FIG. 13 is a schematic view illustrating the installation of a booster cylinder of the micro high pressure air compressor shown in FIG. 1;

FIG. 14 is a circuit configuration diagram of the micro high pressure air compressor shown in FIG. 1;

fig. 15 is a schematic structural view of another embodiment of the present invention.

In the figure: 1. a chassis; 2. a control main board; 3. a drive motor; 4. a transmission device; 5. a secondary compression device; 6. a booster cylinder; 7. a power supply changeover switch; 8. a switching power supply; 9. a reset switch; 11. a direct current electrical interface; 12. an alternating current interface; 81. a first code pressing; 10. a fan; 82. a base plate; 83. a connecting plate; 84. pressing a plate; 85. a ventilation cavity; 821. an air inlet hole; 831. a first heat dissipation hole; 832. a second heat dissipation hole; 13. an automotive fuse receptacle; 14. an automobile fuse plug-in sheet; 15. second pressing; 16. a through hole; 151. An opening; 131. a main base body; 132. a docking portion; 152. a cover plate; 153. a side plate; 154. pressing the arm; 71. A control box; 72. a boat-shaped button; 73. a mounting cavity; 74. a common terminal; 75. a switching terminal; 76. a partition plate; 17. a pressure relief seat; 171. a pressure relief seat body; 172. quickly connecting a male head; 173. an explosion-proof screw; 174. a first pressure relief valve; 175. a blow-off pipe; 176. an adjustable pressure gauge; 61. an air inlet check valve; 62. an air outlet one-way valve; 63. a safety valve; 64. a second pressure relief valve; 18. a support; 19. and a wiring space.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

Refer to fig. 1-14. The embodiment of the utility model provides a miniature high-pressure air compressor with a vehicle-mounted and household dual-power system, which comprises a case 1, a control mainboard 2 arranged in the case 1 and an air compression system; the air compression system comprises a driving motor 3, a transmission device 4, a secondary compression device 5 and a pressure cylinder 6, and a main control IC, a current detection IC, a buzzer, a temperature sensor and a digital display tube are installed on the control mainboard 2.

The utility model discloses miniature high-pressure air compressor still includes power change over switch 7, switching power supply 8, reset switch 9, direct current interface 11 and alternating current interface 12, and reset switch 9, power change over switch 7 and driving motor 3 are connected with the master control IC electricity, and direct current interface 11 and switching power supply 8 are connected with power change over switch 7 electricity, and alternating current interface 12 is connected with switching power supply 8 electricity.

The embodiment of the utility model provides a miniature high-pressure air compressor with on-vehicle and domestic dual-power system, it has direct current interface 11, alternating current interface 12 and power change over switch 7, therefore can support two kinds of power input simultaneously and can switch over the required power through power change over switch 7; the miniature high-pressure air compressor can be driven by an alternating current power supply (for household) and a direct current power supply (for vehicle-mounted), and the use flexibility is improved.

The utility model discloses miniature high-pressure air compressor still includes first pressure sign indicating number 81 and the fan 10 of being connected with master control IC electricity, first pressure sign indicating number 81 includes base plate 82, two connecting plates 83 and set up the clamp plate 84 between two connecting plates 83, switching power supply 8 is located between two connecting plates 83, clamp plate 84 is located base plate 82 and presses switching power supply 8 in one side of quick-witted case 1 towards one side of switching power supply 8, be formed with ventilation chamber 85 between switching power supply 8 and the base plate 82, base plate 82 is provided with the air inlet 821 of intercommunication ventilation chamber 85, fan 10 is installed on base plate 82 dorsad switching power supply 8 and correspond the position of air inlet 821.

Specifically, the two connecting plates 83 are respectively located on two sides of the base plate 82 and are fixedly connected with the case 1 through screws, the number of the pressing plates 84 is two, and the two connecting plates 83 are respectively located on two opposite sides of the two connecting plates 83, the two connecting plates 83 are respectively provided with a first heat dissipation hole 831 and a second heat dissipation hole 832 which are communicated with the ventilation cavity 85, the first heat dissipation hole 831 is located between the pressing plates 84 and the base plate 82, and the second heat dissipation hole 832 is located on two sides of the switching power supply 8.

In this embodiment, the first pressing member 81 presses the switching power supply 8 to one side of the chassis 1 through the pressing plate 84, so as to stabilize the switching power supply 8, thereby reducing the influence of the switching power supply 8 caused by the vibration of the air compression system; the first pressing codes 81 are used for fixing the switching power supply 8 on the case 1 on one hand and are used as mounting bases of the fan 10 on the other hand, so that the dual-purpose effect of one code is realized, the fan 10 is not required to be provided with an additional mounting base, the material cost can be saved, and the whole volume of the equipment can be reduced; since the fan 10 is installed on the base plate 82 opposite to the switching power supply 8 and corresponding to the air inlet 821, when the fan 10 is started, the air will continuously flow into the ventilation cavity 85, so as to accelerate the air flow near the switching power supply 8, which is beneficial to heat dissipation of the switching power supply 8.

The utility model discloses miniature high-pressure air compressor still includes car fuse socket 13, car fuse inserted sheet 14 and second press sign indicating number 15, car fuse socket 13 sets up at quick-witted incasement 1 and is used for being connected with the master control IC electricity, car fuse inserted sheet 14 embeds there is the fuse, second press sign indicating number 15 and quick-witted case 1 fixed connection and be used for pushing down car fuse socket 13, quick-witted case 1 is provided with through-hole 16, so that car fuse inserted sheet 14 can follow quick-witted case 1's outside through-hole 16 and insert car fuse socket 13.

Specifically, an opening 151 is disposed on one side of the second press code 15 facing the through hole 16, the automotive fuse socket 13 includes a main seat body 131 located in the second press code 15 and a butt joint portion 132 located on one side of the main seat body 131 and extending out of the opening 151, the butt joint portion 132 is used for receiving the automotive fuse plug-in piece 14, the second press code 15 includes a cover plate 152 for covering the automotive fuse socket 13, a side plate 153 disposed on one side of the cover plate 152, and two press arms 154 disposed on the other side of the cover plate 152, the opening 151 is located between the two press arms 154, and the main seat body 131 is sandwiched between the side plate 153 and the press arms 154.

In this embodiment, the combination of the automobile fuse socket 13 and the automobile fuse insert 14 is a fuse, and a fuse is built in the automobile fuse insert 14, so that when the current of a circuit system of the device is too large, the fuse can be fused and protected; the second pressing code 15 is used for pressing the automobile fuse socket 13 to ensure the stability of the automobile fuse socket 13 and the automobile fuse inserting piece 14, so that the fuse is ensured to be in a stable state, and the fuse is prevented from shifting and even separating from a circuit due to vibration of equipment; be provided with through-hole 16 on quick-witted case 1 for car fuse inserted sheet 14 can insert car fuse socket 13 through-hole 16 from quick-witted case 1's outside, consequently can directly change the fuse in quick-witted case 1 outside, and is very convenient, and second pressure sign indicating number 15 can guarantee the stability at plug in-process car fuse socket 13 in addition, prevents that car fuse socket 13 from shifting or even breaking away from the circuit.

The power switch 7 of the miniature high-pressure air compressor of the embodiment of the present invention is a ship-shaped switch, which comprises a control box 71, a ship-shaped button 72 and three pairs of terminals, wherein the control box 71 is provided with an installation cavity 73, one end of the terminal is fixed in the installation cavity 73, the other end extends out of the control box 71, the three pairs of terminals comprise a pair of common terminals 74 and two pairs of switch terminals 75 located at two sides of the common terminals 74, the ship-shaped button 72 is provided with three pairs of contacts, the three pairs of contacts comprise a pair of common contacts and two pairs of switch contacts located at two sides of the common contacts, the common contacts are connected with the common terminals 74, when one pair of switch contacts and one pair of switch terminals 75 are in a connected state, the other pair of switch contacts and the other pair of switch terminals 75 are in a disconnected state, the direct current interface 11 is used for being electrically connected with one pair of switch terminals, the switching power supply 8 is adapted to be electrically connected to another pair of switching terminals 75.

Specifically, the boat-shaped button 72 is located at the top of the control box 71, the terminals protrude below the control box 71, a partition 76 is provided at the bottom of the control box 71, three pairs of terminals are arranged in a row along the extending direction of the partition 76, and each pair of terminals is partitioned by the partition 76.

In the present embodiment, since the common contact is turned on the common terminal 74 (the common terminal 74 is turned on with the internal circuit of the equipment), and when one pair of switching contacts is in an on state with one pair of switching terminals 75, the other pair of switching contacts is in an off state with the other pair of switching terminals 75, the on state of the boat-shaped switch can be switched by toggling the boat-shaped button 72, thereby switching the power supply for use of the equipment;

for example, when switching to a dc power supply is required, the boat-shaped button 72 may be shifted to one side so that the switching terminal 75 and the switching contact corresponding to the dc power supply are in an on state, and the switching terminal 75 and the switching contact corresponding to the ac power supply are in an off state, and when switching to an ac power supply is required, the boat-shaped button 72 may be shifted to the other side so that the switching terminal 75 and the switching contact corresponding to the ac power supply are in an on state, and the switching terminal 75 and the switching contact corresponding to the dc power supply are in an off state;

because the ship-shaped switch adopts a mode that a pair of contacts is communicated with a pair of terminals (namely a mode of butt joint of every two contacts), parallel shunt can be realized, so that the current passing through the ship-shaped switch is reduced, and the ship-shaped switch has the advantages of safety in use and long service life.

The utility model discloses miniature high-pressure air compressor still includes pressure release seat 17, pressure release seat 17 includes pressure release seat main part 171, connect public head 172 soon, explosion-proof screw 173, first relief valve 174, blow off pipe 175 and adjustable pressure gauge 176, adjustable pressure gauge 176 is connected with master control IC electricity, pressure release seat main part 171 is installed in quick-witted case 1 and is used for communicating with second grade compressor arrangement 5, blow off pipe 175 stretches out to quick-witted case 1's below, pressure cylinder 6 is provided with inlet check valve 61, outlet check valve 62, relief valve 63 and second relief valve 64, second relief valve 64 is located the bottom of pressure cylinder 6, first relief valve 174 and second relief valve 64 all are provided with the knob, the knob of first relief valve 174 is located quick-witted case 1's lateral surface, the knob of second relief valve 64 is located quick-witted case 1's below.

In this embodiment, by opening the first pressure release valve 174, the oil and water accumulated in the pressure release seat main body 171 can be discharged, and the oil and water flows out along the drainage pipe 175 and is directly discharged to the lower part of the case 1; people can discharge oil and water in time by using the first pressure release valve 174, so that the air outlet quality and the normal operation of equipment are guaranteed, and the oil and water are discharged to the lower part of the case 1 along the sewage discharge pipe 175, so that the oil and water cannot splash on human bodies, and the air conditioner has the advantage of safe use; after the miniature high-pressure air compressor finishes using, the inside high-pressure gas of machine is discharged to the accessible first relief valve to discharge profit under the drive of air current by the way.

In the embodiment, the pressure cylinder 6 is provided with a safety valve 63, wherein the safety valve 63 is used for discharging gas in time to play an explosion-proof protection role when the pressure cylinder 6 is too high due to equipment failure (such as backflow generated by the air outlet one-way valve 62); in addition, the bottom end of the pressure cylinder 6 is provided with a second pressure relief valve 64, and a knob of the second pressure relief valve 64 is positioned below the case 1, so that oil and water in the pressure cylinder 6 flow out to the lower part of the case 1, are not easy to splash onto a person, and are convenient and safe to operate; after the miniature high-pressure air compressor finishes using, the inside high-pressure gas of machine is discharged to accessible second relief valve to discharge profit under the drive of air current by the way.

About the utility model discloses a miniature high-pressure air compressor, its switching power supply 8 can also set up like this: referring to fig. 15, the micro high-pressure air compressor further includes a bracket 18, the air compression system and the switching power supply 8 are both disposed in the case 1, the switching power supply 8 is mounted at the top of the case 1, the air compression system is mounted at the bottom of the case 1, one end of the switching power supply 8 is fixedly connected to the case 1 (through screws), the switching power supply 8 is fixedly connected to the case 1 through the bracket 18, and the bracket 18 is located at the bottom end of the switching power supply 8, so that a wiring space 19 is formed between the other end of the switching power supply 8 and the case 1. The wiring space 19 can facilitate wiring for an operator and connection between the switching power supply 8 and the ac power interface 12 (and other components).

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a miniature high-pressure air compressor with on-vehicle and domestic dual power system which characterized in that: including master control IC, power change over switch, switching power supply, direct current electrical interface, alternating current electrical interface and air compression system, air compression system includes driving motor, power change over switch reaches driving motor with master control IC electricity is connected, direct current electrical interface reaches switching power supply with power change over switch electricity is connected, alternating current electrical interface with switching power supply electricity is connected.

2. The micro high pressure air compressor as claimed in claim 1, wherein: miniature high-pressure air compressor still includes quick-witted case, the first sign indicating number of pressing and the fan of being connected with the master control IC electricity, first sign indicating number of pressing includes base plate, two connecting plates and sets up the clamp plate between two connecting plates, switching power supply is located between two connecting plates, the clamp plate is located the base plate orientation one side of switching power supply will switching power supply presses one side of quick-witted case, switching power supply with be formed with the ventilation chamber between the base plate, the base plate is provided with the intercommunication the fresh air inlet in ventilation chamber, the fan is installed the base plate dorsad switching power supply just corresponds on the position of fresh air inlet.

3. The micro high pressure air compressor as claimed in claim 2, wherein: the two connecting plates are respectively located on two sides of the base plate and fixedly connected with the case through screws, the number of the pressing plates is two, the pressing plates are respectively located on two opposite sides of the two connecting plates, the two connecting plates are respectively provided with a first heat dissipation hole and a second heat dissipation hole, the first heat dissipation holes are communicated with the ventilation cavities, the first heat dissipation holes are located between the pressing plates and the base plate, and the second heat dissipation holes are located on two sides of the switching power supply.

4. The micro high pressure air compressor as claimed in claim 1, wherein: miniature high-pressure air compressor still includes quick-witted case, car fuse socket, car fuse inserted sheet and second and presses the sign indicating number, car fuse socket sets up quick-witted incasement and be used for being connected with main control IC electricity, car fuse inserted sheet embeds there is the fuse, the second press the sign indicating number with quick-witted case fixed connection is used for pushing down car fuse socket, quick-witted case is provided with the through-hole, so that car fuse inserted sheet can be followed the outside warp of quick-witted case the through-hole inserts car fuse socket.

5. The micro high pressure air compressor as claimed in claim 4, wherein: the sign indicating number orientation is pressed to the second one side of through-hole is provided with the opening, car fuse socket is including being located the second is pressed the main pedestal in the sign indicating number and is located main pedestal one side stretches out open-ended butt joint portion, butt joint portion is used for inserting car fuse inserted sheet, the second is pressed the sign indicating number including being used for the lid and is in car fuse socket is last apron, set up in the curb plate of apron one side and set up in two pressure arms of apron opposite side, the opening is located between two pressure arms, main pedestal presss from both sides the curb plate with between the pressure arm.

6. The micro high pressure air compressor as claimed in claim 1, wherein: the power supply change-over switch is a ship-shaped switch, the ship-shaped switch comprises a control box, a ship-shaped button and three pairs of terminals, the control box is provided with an installation cavity, one end of the terminal is fixed in the installation cavity, the other end of the terminal extends out of the control box, the three pairs of terminals comprise a pair of common terminals and two pairs of switching terminals positioned at two sides of the common terminals, the boat-shaped button is provided with three pairs of contacts, the three pairs of contacts comprise a pair of common contacts and two pairs of switching contacts positioned at two sides of the common contacts, the common contacts are communicated with the common terminals, when one pair of switching contacts and one pair of switching terminals are in an on state, the other pair of switching contacts and the other pair of switching terminals are in an off state, the direct current interface is used for being electrically connected with one pair of switching terminals, and the switching power supply is used for being electrically connected with the other pair of switching terminals.

7. The micro high pressure air compressor as claimed in claim 6, wherein: the ship-shaped button is located at the top of the control box, the terminals extend out of the lower portion of the control box, a partition plate is arranged at the bottom of the control box, the three pairs of terminals are arranged in the extending direction of the partition plate, and each pair of terminals are separated by the partition plate.

8. The micro high pressure air compressor as claimed in claim 1, wherein: the air compression system also comprises a transmission device, a three-stage compression device and a pressure cylinder, the miniature high-pressure air compressor also comprises a case and a pressure relief seat communicated with the three-stage compression device, the pressure relief seat comprises a pressure relief seat main body, a quick-connection male head, an explosion-proof screw, a first pressure relief valve, a drain pipe and an adjustable pressure gauge, the adjustable pressure gauge is electrically connected with the main control IC, the pressure relief seat main body is arranged in the case, the blow-off pipe extends to the lower part of the case, the pressure cylinder is provided with an air inlet one-way valve, an air outlet one-way valve, a safety valve and a second pressure relief valve, the second pressure release valve is positioned at the bottom end of the pressure cylinder, the first pressure release valve and the second pressure release valve are both provided with knobs, the knob of the first pressure release valve is located on the outer side face of the case, and the knob of the second pressure release valve is located below the case.

9. The micro high pressure air compressor as claimed in claim 1, wherein: the miniature high-pressure air compressor further comprises a control mainboard, a current detection IC, a buzzer, a temperature sensor and a digital display tube, wherein the master control IC, the current detection IC, the buzzer, the temperature sensor and the digital display tube are all installed on the control mainboard.

10. The micro high pressure air compressor as claimed in claim 1, wherein: the miniature high-pressure air compressor further comprises a case and a support, the air compression system and the switch power supply are arranged in the case, the switch power supply is installed at the top of the case, the air compression system is installed at the bottom of the case, one end of the switch power supply is fixedly connected with the case, the other end of the switch power supply is fixedly connected with the case through the support, and the support is located at the bottom end of the switch power supply, so that a wiring space is formed between the other end of the switch power supply and the case.