JP2018155100A - Gas compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas compressor capable of stopping a compressing portion according to a state of a power source supplying power to a motor.SOLUTION: A gas compressor 10 has a motor 13 supplied power to rotate, and a compressing portion 14 which is actuated by rotational force of the motor 13 to compress and discharge gas. The gas compressor has a first feeding portion 17 which supplies power of either one of a first power source 61 or a second power source 56 which are different from each other in a supply state of the power to the motor 13 to the motor 13; a control portion 17 which stops the compressing portion 14 according to target pressure of the gas discharged from the compressing portion 14; and a setting portion 17 which sets the target pressure according to the power source supplying the power to the motor 13.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a gas compressor including a motor and a compression unit that compresses gas with the rotational force of the motor.

  An example of a gas compressor including a motor and a compression unit that compresses gas with the rotational force of the motor is described in Patent Document 1. The air compressor as a gas compressor described in Patent Document 1 includes a power supply circuit, a drive unit, a control circuit unit, a compressed air generation unit, and a tank unit. The drive unit includes a motor and a motor drive circuit. The tank unit includes a tank, a coupler, and a pressure sensor. The coupler is connected to the pneumatic tool via an air hose. The pressure sensor detects the pressure of the compressed air in the tank, and the detection signal of the pressure sensor is input to the control circuit unit. The commercial power is supplied to the power circuit through the main switch. The power supply circuit includes a rectifier circuit, and the power supply circuit supplies DC power to the control circuit unit and the drive unit.

  The control circuit starts the main switch by turning it on, then stops the motor, and sets a motor stop pressure Poff that is a motor stop pressure of the tank internal pressure. Thereafter, the control circuit determines whether or not the latest pressure in the tank is greater than the set motor stop pressure Poff. The control circuit changes the motor stop pressure Poff according to the determination result.

Japanese Patent No. 4690694

  However, the gas compressor described in Patent Document 1 does not consider a power source that supplies power to the motor, and has room for improvement.

  The objective of this indication is providing the gas compressor which can stop a compression part according to the state of the power supply which supplies electric power to a motor.

  A gas compressor according to an embodiment is a gas compressor having a motor that is rotated by being supplied with electric power, and a compression unit that is operated by a rotational force of the motor to compress and discharge the gas. A power supply state of the first power supply and the second power supply, which are different from each other in power supply state. The first power supply section supplies power to the motor, and the target pressure of the gas discharged from the compression section. And a control unit that stops the compression unit and a setting unit that sets the target pressure according to the power source that supplies power to the motor.

  The gas compressor of one embodiment can stop a compression part according to the state of the power supply which supplies electric power to a motor.

FIG. 3 is a schematic diagram illustrating a first usage example of the air compressor according to the first embodiment. FIG. 3 is a schematic diagram illustrating a usage example 2 of the air compressor according to the first embodiment. It is a top view of an air compressor. FIG. 6 is a schematic diagram illustrating a usage example 3 of the air compressor according to the first embodiment. 6 is a schematic diagram illustrating a first usage example of the air compressor according to the second embodiment. FIG. FIG. 6 is a schematic diagram showing a usage example 2 of the air compressor of the second embodiment.

  Hereinafter, the air compressor according to the present embodiment will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted.

(Embodiment 1)
1 and 2 show an air compressor 10 according to the first embodiment. The air compressor 10 includes a main body part 11 and a tank part 12. The tank part 12 is attached to the frame, and the main body part 11 can be attached to and detached from the frame. The main body portion 11 is disposed on the tank portion 12. The main body 11 includes an electric motor 13, a compression unit 14, a pressure accumulating unit 15, a pressure regulator 16, a control circuit 17, and an external input circuit 18. The electric motor 13 is a brushless motor, and has a rotor and a stator.

  The control circuit 17 includes a microcomputer 19, an inverter circuit 20, and a determination circuit 21. The microcomputer 19 includes a calculation unit, an input / output interface, and a storage unit. Information for controlling the electric motor 13 is stored in the storage unit. The inverter circuit 20 has a switching element and is connected to the stator of the electric motor 13. Adapters 22 and 23 are provided on the main body 11. The adapters 22 and 23 are electrically connected to the inverter circuit 20. The determination circuit 21 detects a state of power supplied via the adapters 22 and 23, for example, a voltage, and sends a detection signal to the microcomputer 19.

  The external input circuit 18 is connected to the power switch and the operation panel 24 shown in FIG. The operation panel 24 includes a notification unit and an operation unit. The notification unit includes a liquid crystal display and a lamp. The operation unit includes a button, a touch switch, and a knob. An operator can operate the operation panel 24 to input a target pressure and input a power source that supplies electric power to the electric motor 13. A signal output from the external input circuit 18 is input to the microcomputer 19. The notification unit displays the set target pressure, the air pressure of the air passage, and the power source that supplies power to the electric motor 13. The target pressure set by the operator varies depending on the work application.

  In the present disclosure, in addition to being able to set the target pressure by the operator operating the operation panel 24, the microcomputer 19 can also set the target pressure according to the state of the power source.

  As shown in FIGS. 1 and 2, a phase detection sensor 63 that detects the phase in the rotation direction of the rotor of the electric motor 13 is provided, and a signal output from the phase detection sensor 63 is input to the microcomputer 19. The microcomputer 19 processes the detection signal of the determination circuit 21, the signal of the external input circuit 18 and the phase detection sensor 63, and controls the inverter circuit 20 based on the information stored in the storage unit.

  The compression unit 14 includes a first compression unit 25 and a second compression unit 26. The 1st compression part 25 and the 2nd compression part 26 have a connecting rod, a piston, a cylinder, and a compression chamber, respectively. The compression chamber of the first compression unit 25 has an intake port 27 and an exhaust port 28, and the compression chamber of the second compression unit 26 has an intake port 29 and an exhaust port 30. The connecting rod is connected to the rotor via the rotating shaft of the electric motor 13, the piston is connected to the connecting rod, and the piston is provided so as to be operable in the cylinder. The compression chamber is formed in the cylinder. A filter 31 is connected to the air inlet 27 of the first compression unit 25. The exhaust port 28 of the first compression unit 25 is connected to the intake port 29 of the second compression unit 26. That is, the second compression unit 26 is provided downstream of the first compression unit 25 in the air flow direction.

  The pressure accumulating unit 15 includes a metal block 35 and air passages 32 and 33 provided in the block 35. The air passage 33 branches off from the air passage 32. A ventilation pipe 38 that connects the ventilation path 32 and the exhaust port 30 of the second compression section 26 is provided. The air passage 33 is connected to the air socket 53. The air socket 53 has a valve function. When an air hose is connected to the air socket 53, the compressed air in the air passage 32 is sent to the air hose. On the other hand, when the air hose is removed from the air socket 53, the air in the ventilation path 32 does not leak from the air socket 53.

  A pressure sensor 39 for detecting the air pressure in the air passage 32 is provided. A signal output from the pressure sensor 39 is input to the microcomputer 19. A relief valve 40 is provided. The relief valve 40 has an exhaust port 41. The relief valve 40 is a solenoid valve. The relief valve 40 is closed when the air pressure in the air passage 32 becomes equal to or higher than the upper limit pressure, and the relief valve 40 is closed when the air pressure in the air passage 32 is less than the upper pressure limit. The microcomputer 19 performs control to change the upper limit pressure. The upper limit value set by the microcomputer 19 is lower than the target pressure. The target pressure will be described later. When the relief valve 40 is opened, the air passage 32 and the exhaust port 41 are connected. When the relief valve 40 is closed, the air passage 32 and the exhaust port 41 are shut off.

  As shown in FIG. 3, the air compressor 10 has a cover 42, and a space is formed between the cover 42 and the tank portion 12. The electric motor 13, the compression unit 14, the pressure accumulating unit 15, the pressure regulator 16, and the control circuit 17 are arranged in a space. The operation panel 24 is provided on the cover 42.

  The pressure regulator 16 shown in FIGS. 1 and 2 is a pressure reducing valve, and a plurality of, specifically two, pressure regulators 16 are provided. The two pressure regulators 16 each have an intake port 43, an exhaust port 44, and a pressure adjustment knob 45 shown in FIG. As shown in FIGS. 1 and 2, the intake ports 43 of the two pressure regulators 16 are connected to the air passage 32 through the air pipe 46. That is, the two pressure regulators 16 are connected in parallel to the vent pipe 46.

  The exhaust ports 44 of the two pressure regulators 16 are respectively connected to an air socket 48 via a vent pipe 47. Each air socket 48 has a valve function. When an air hose is connected to the air socket 48, the compressed air in the vent pipe 47 is sent to the air hose. On the other hand, when the air hose is removed from the air socket 48, the air in the vent pipe 47 does not leak from the air socket 48. A pressure gauge 49 for displaying the air pressure in the ventilation pipe 47 is provided. As shown in FIG. 3, the two pressure adjusting knobs 45 and the two pressure gauges 49 are disposed so as to be exposed from the cover 42.

  The tank unit 12 shown in FIGS. 1 and 2 includes an air tank 50 and a power supply unit 51. A plurality of air tanks 50 are provided, for example, two as shown in FIG. The two air tanks 50 are connected to each other by a vent pipe. The air tank 50 can be attached to and detached from the air socket 53 via the air hose 52. The power supply unit 51 includes a rectifier circuit, and a power cord 54 is connected to the power supply unit 51. The plug 55 of the power cord 54 can be connected to and removed from the commercial power source 56. The commercial power source 56 is an AC power source, and the voltage of the commercial power source 56 is 100V.

  The tank unit 12 has an adapter 57, and the adapter 57 is electrically connected to the power supply unit 51. A power cord 58 is provided, an adapter 59 is provided at the first end of the power cord 58, and an adapter 60 is provided at the second end.

  Further, a battery 61 is provided. The battery 61 is a secondary battery that can be charged and discharged. The battery 61 includes a case, a battery cell accommodated in the case, and an adapter 62 provided in the case. The battery 61 is a DC power source, and the voltage of the battery 61 is 35V. The adapter 62 has the same shape and structure as the adapter 60.

  An air tool 64 </ b> A is provided, and the air tool 64 </ b> A has an air socket 65. The air socket 65 can be connected to the air socket 48 via the air hose 66. The pneumatic tool 64A operates using compressed air. The pneumatic tool 64A is a light work tool with a low working pressure. Light work tools include, for example, air dusters and spray guns. An air duster blows off dust by injecting compressed air. The spray gun sprays paint onto an object using compressed air.

(Usage example 1)
A usage example 1 of the air compressor 10 according to the first embodiment is shown in FIG. The usage example 1 of the air compressor 10 supplies the electric power of the battery 61 to the electric motor 13. The adapter 62 of the battery 61 is connected to the adapter 23. The adapter 59 of the power cord 58 is removed from the adapter 22. The main body 11 is removed from the frame and is in a cordless state where the power cord 58 is not connected. Further, the air hose 52 is removed from the air socket 53.

  When the power switch is turned on, the determination circuit 21 determines the voltage of the battery 61 and inputs a signal to the microcomputer 19 while the electric motor 13 is stopped. The microcomputer 19 sets either the first target pressure or the second target pressure according to the voltage determination result. The first target pressure and the second target pressure are target values of the maximum pressure of the air discharged from the compression unit 14.

  In the present disclosure, the target pressure is a reference value for stopping the compression unit 14. The microcomputer 19 operates the compression unit 14 when the pressure of the compressed air discharged from the compression unit 14 is less than the target pressure. The microcomputer 19 stops the compression unit 14 when the pressure of the compressed air discharged from the compression unit 14 is equal to or higher than the target pressure. The second target pressure is higher than the first target pressure and lower than the upper limit pressure. The first target pressure is, for example, 1.0 MPa, and the second target pressure is, for example, 4.5 MPa. The microcomputer 19 selects the first target pressure when supplying the electric power of the battery 61 to the electric motor 13.

  When the microcomputer 19 controls the inverter circuit 20, the electric power of the battery 61 is supplied to the electric motor 13, and the stopped electric motor 13 rotates. When the rotational force of the electric motor 13 is transmitted to the compression unit 14, the first compression unit 25 and the second compression unit 26 operate. First, air is sucked into the first compression unit 25 through the filter, and the air is compressed in the compression chamber of the first compression unit 25. The air compressed by the first compression unit 25 is discharged from the exhaust port 28 and sent to the second compression unit 26. Further, air is compressed in the compression chamber of the second compression unit 26, and the air compressed by the second compression unit 26 is sent to the pressure accumulating unit 15 through the exhaust port 30 and the vent pipe 38.

  The compressed air sent to the pressure accumulating unit 15 is reduced to a predetermined first use pressure by the pressure regulator 16 and then sent to the air tool 64 </ b> A via the vent pipe 47 and the air hose 66. When the operator applies operating force to the trigger of the air tool 64A, the compressed air in the air hose 66 is supplied to the air chamber, and the air tool 64A operates.

  The first operating pressure to be reduced by the pressure regulator 16 is set by the operator operating the pressure adjusting knob 45 before the operator uses the pneumatic tool 64. The operator can set the air pressure necessary for using the pneumatic tool 64A as the first working pressure. The first operating pressure is lower than the first target pressure.

  The pressure sensor 39 detects the air pressure in the air passage 32 and inputs a signal corresponding to the detection result to the microcomputer 19. When the air pressure in the air passage 32 reaches the first target pressure, the microcomputer 19 controls the inverter circuit 20 to stop the electric motor 13. When the electric motor 13 is stopped, the first compression unit 25 and the second compression unit 26 are stopped, and the exhaust port 30 is closed.

  When the operator uses the pneumatic tool 64A, the air pressure in the ventilation path 32 of the pressure accumulating unit 15 is reduced. When the air pressure in the air passage 32 reaches the first return pressure, the microcomputer 19 rotates the stopped electric motor 13. The first return pressure is lower than the first target pressure and higher than the working pressure.

  Thus, in the usage example 1 of the air compressor 10, the electric motor 13 is driven by the power of the battery 61, and the compressed air discharged from the compression unit 14 is stored in the air passage 32, the air pipe 46, and the air hose 66. The Further, the microcomputer 19 sets the first target pressure according to the voltage of the battery 61. Therefore, power consumption in the battery 61 can be suppressed.

  Further, when the adapter 62 of the battery 61 whose voltage has dropped is connected to the adapter 57 of the tank unit 12 as shown by a two-dot chain line in FIG. 1, the power of the commercial power source 56 is supplied to the battery 61 via the power supply unit 51. Charged. Further, since the adapter 57 can be connected to either the adapter 60 or the adapter 62, an increase in the number of adapters provided in the tank unit 12 can be reduced.

  In addition, by setting the first target pressure in accordance with the pneumatic tool 64A used for light work that can be used even at low pressure, workability during light work using the air tool 64A is improved.

  The air socket 53 has a valve function, and the air in the air passage 32 does not leak from the air socket 53 when the air hose 52 is not connected to the air socket 53. Further, the air socket 48 has a valve function, and air in the vent pipe 47 does not leak from the air socket 48 to which the air hose 66 is not connected.

(Usage example 2)
The usage example 2 of the air compressor 10 of Embodiment 1 is demonstrated with reference to FIG. The usage example 2 of the air compressor 10 is an example in which the electric power of the commercial power supply 56 is supplied to the electric motor 13. The adapter 62 of the battery 61 is connected to the adapter 23. The adapter 59 of the power cord 58 is connected to the adapter 22. For this reason, the power of the commercial power source 56 reaches the determination circuit 21 via the power supply unit 51, the power cord 58 and the adapter 22. Further, the air hose 52 is connected to the air socket 53, and the air passage 32 and the air tank 50 are connected via the air hose 52.

  An air tool 64 </ b> B is provided, and the air tool 64 </ b> B has an air socket 65. The air socket 65 can be connected to the air socket 48 via the air hose 66. The pneumatic tool 64B operates using compressed air. The pneumatic tool 64B is a heavy work tool having a high working pressure. The heavy work tool includes, for example, a nailer and an air impact driver.

  When the power switch is turned on, the microcomputer 19 compares the voltage of the battery 61 and the voltage of the commercial power supply 56 with the electric motor 13 stopped. The microcomputer 19 sets the second target pressure according to the higher voltage, that is, the voltage of the commercial power source 56.

  The microcomputer 19 controls the inverter circuit 20 so that the electric power of the commercial power supply 56 is supplied to the electric motor 13 and the stopped electric motor 13 rotates. Further, the microcomputer 19 controls the inverter circuit 20 to cut off the battery 61 and the electric motor 13 and put the battery 61 in a standby state. When the rotational force of the electric motor 13 is transmitted to the compression unit 14, air is compressed by the compression unit 14 and sent to the air passage 32 of the pressure accumulating unit 15 as in the first usage example.

  The compressed air in the ventilation path 32 is stored in the air tank 50 via the air hose 52. When the air pressure in the air passage 32 reaches the second target pressure, the microcomputer 19 controls the inverter circuit 20 to stop the electric motor 13. When the electric motor 13 stops, the exhaust port 30 is closed.

  Further, a part of the compressed air in the ventilation path 32 is reduced to a predetermined second use pressure by the pressure regulator 16 and then sent to the air hose 66 through the ventilation pipe 47. The second operating pressure that is reduced by the pressure regulator 16 is set by the operator by operating the pressure adjusting knob 45 before the operator uses the pneumatic tool 64B. The second operating pressure is lower than the second target pressure and higher than the first operating pressure.

  When the air tool 64B is used while the electric motor 13 is stopped, the compressed air in the air tank 50 is supplied to the air tool 64 via the pressure regulator 16 and the air hose 66, and the air pressure in the air passage 32 decreases. . When the air pressure in the air passage 32 reaches the second return pressure, the microcomputer 19 rotates the stopped electric motor 13. The second return pressure is lower than the second target pressure and higher than the second operating pressure.

(Usage example 3)
FIG. 4 shows a usage example 3 of the air compressor 10 according to the first embodiment. The adapter 62 of the battery 61 is connected to the adapter 23, and the commercial power source 56 is connected to the adapter 22 via the power supply unit 51 and the power cord 58. The microcomputer 19 can charge the battery 61 with the electric power of the commercial power source 56 when the electric motor 13 is stopped.

(Embodiment 2)
5 and 6 show the air compressor 10 of the second embodiment. In the air compressor 10 of the second embodiment, the same components as those of the air compressor 10 of the first embodiment are denoted by the same reference numerals as those in FIGS.

  The compression unit 14 has ventilation paths 67, 68, 69, 71 and check valves 70, 72. The ventilation path 67 is connected to the intake port 27 and the filter 31, and the ventilation path 68 is connected to the exhaust port 28. The air passage 69 is connected to the air inlet 29. The check valve 70 connects or blocks the ventilation path 67 and the ventilation path 69. The check valve 70 opens and closes according to the pressure in the ventilation path 67 and the pressure in the ventilation path 69. When the check valve 70 is opened, the air in the air passage 67 is sent to the air passage 69. When the check valve 70 is closed, the air in the air passage 67 is not sent to the air passage 69 and the air in the air passage 69 is prevented from returning to the air passage 67.

  The air passage 71 connects the air passage 68 and the air pipe 38. The check valve 72 connects or blocks the ventilation path 71 and the ventilation pipe 38. The check valve 72 opens and closes according to the pressure in the ventilation path 71 and the pressure in the ventilation pipe 38. When the check valve 72 is opened, the air in the ventilation path 71 is sent to the ventilation pipe 38. When the check valve 72 is closed, the air in the vent path 71 is not sent to the vent pipe 38 and the air in the vent pipe 38 is prevented from returning to the vent path 71.

  An air socket 75 is provided at the end of the air passage 68, and the air pipe 76 is detachable from the air socket 75. The air socket 75 has a valve function. When the vent pipe 76 is connected to the air socket 75, the compressed air in the vent path 68 is sent to the vent pipe 76. On the other hand, when the ventilation pipe 76 is removed from the air socket 75, the air in the ventilation path 68 can be prevented from leaking from the air socket 75.

  An air socket 77 is provided at the end of the air passage 69, and the air pipe 78 is detachable from the air socket 77. The air socket 77 has a valve function. When the vent pipe 78 is connected to the air socket 77, the compressed air in the vent pipe 78 is sent to the vent path 69. On the other hand, when the ventilation pipe 78 is removed from the air socket 77, the air in the ventilation path 69 can be prevented from leaking from the air socket 77.

  The tank unit 12 has a piping member 73. The piping member 73 is made of a metal or synthetic resin pipe or a metal block. The piping member 73 has an air passage 74. The first end of the air passage 74 can be connected to or shut off from the air socket 75 through the air pipe 76. The second end of the air passage 74 can be connected to or shut off from the air socket 77 through the air pipe 78.

(Usage example 1)
FIG. 5 shows a first usage example of the air compressor 10 according to the second embodiment. In the first usage example of the air compressor 10, the electric power of the commercial power supply 56 is supplied to the electric motor 13. The adapter 62 of the battery 61 is connected to the adapter 23. The adapter 59 of the power cord 58 is connected to the adapter 22. For this reason, the power of the commercial power source 56 reaches the determination circuit 21 via the power supply unit 51, the power cord 58 and the adapter 22. Further, the air hose 52 is connected to the air socket 53, and the air passage 32 and the air tank 50 are connected via the air hose 52. Further, the first end of the air passage 74 is connected to the air socket 75, and the second end of the air passage 74 is connected to the air socket 77.

  When the power switch is turned on, the microcomputer 19 compares the voltage of the battery 61 and the voltage of the commercial power supply 56 with the electric motor 13 stopped. The microcomputer 19 sets the second target pressure according to the higher voltage, that is, the voltage of the commercial power source 56.

  Moreover, the electric power of the commercial power source 56 is supplied to the electric motor 13, and the stopped electric motor 13 rotates. Since the microcomputer 19 puts the battery 61 in a standby state, the power of the battery 61 is not supplied to the electric motor 13. The first compression unit 25 and the second compression unit 26 are operated by the rotational force of the electric motor 13. When the first compression unit 25 is activated, air is sucked into the air inlet 27 via the filter 31 and the air passage 67.

  Air is compressed by the first compression unit 25, and the compressed air exiting from the exhaust port 28 is sent to the intake port 29 of the second compression unit 26 via the ventilation path 68, the ventilation path 74, and the ventilation path 69. The air is further compressed by the second compression unit 26 to increase the pressure, and the compressed air is sent from the exhaust port 30 to the vent pipe 38. The air pressure of the vent pipe 38 is P2, which is higher than the air pressure P1 of the vent paths 68 and 69.

  During the operation of the first compression unit 25, the air pressure P0 of the air passage 67 is lower than the air pressure P1 of the air passage 69, and the check valve 70 is closed. For this reason, it is possible to prevent the compressed air in the air passage 69 from returning to the air passage 67. Further, during the operation of the second compression portion 26, the air pressure P1 of the air passage 71 is lower than the air pressure P2 of the air pipe 38, and the check valve 72 is closed. For this reason, it is possible to prevent the compressed air of the ventilation pipe 38 from returning to the ventilation path 71.

  In the usage example 1 of the air compressor 10 according to the second embodiment, the first compression unit 25 and the second compression unit 26 are connected in series in the air flow direction. That is, air is compressed in two stages by the first compression unit 25 and the second compression unit 26 and sent to the pressure accumulation unit 15.

(Usage example 2)
FIG. 6 shows a usage example 2 of the air compressor 10 according to the second embodiment. The usage example 2 of the air compressor 10 supplies the electric power of the battery 61 to the electric motor 13. The adapter 62 of the battery 61 is connected to the adapter 23. Further, the adapter 59 of the power cord 58 is not connected to the adapter 22. Further, the air hose 52 is not connected to the air socket 53. Further, the air socket 75 is cut off from the air passage 74, and the air socket 77 is cut off from the air passage 74.

  When the power switch is turned on, the microcomputer 19 sets the first target pressure according to the voltage of the battery 61 in a state where the electric motor 13 is stopped. Then, the electric power of the battery 61 is supplied to the electric motor 13, and the stopped electric motor 13 rotates. The first compression unit 25 and the second compression unit 26 are operated by the rotational force of the electric motor 13. The air that has passed through the filter 31 is sucked into the air inlet 27 through the air passage 67. The air compressed by the first compression unit 25 is sent from the exhaust port 28 to the ventilation path 68. Since the air socket 75 is blocked from the air passage 74, the compressed air in the air passage 68 can be prevented from leaking from the air socket 75.

  When the second compressor 26 is activated and the pressure at the intake port 29 is reduced, the check valve 70 is opened, and the air in the air passage 67 is sucked into the air inlet 29 through the air passage 69. In addition, since the air socket 77 is cut off from the air passage 74, the air in the air passage 69 can be prevented from leaking from the air socket 77. The air compressed by the second compression unit 26 is sent from the exhaust port 30 to the vent pipe 38. When the air pressure P1 of the air passage 71 is larger than the air pressure P2 of the air pipe 38, the check valve 72 is opened, and the compressed air in the air passage 71 is sent to the air pipe 38. In this way, the air sucked into the air passage 67 through the filter 31 is compressed by the first compression unit 25 and the second compression unit 26 connected in parallel to each other and sent to the pressure accumulating unit 15.

  As described above, the air compressor 10 according to the first embodiment and the air compressor 10 according to the second embodiment both have power supplies that supply power to the electric motor 13 according to the voltage of the battery 61 and the voltage of the commercial power supply 56. Can be set.

  The meaning of the items described in this disclosure will be described. The electric motor 13 is an example of a motor, the compression unit 14 and the air compressor 10 are examples of a gas compressor, and the voltage is an example of a power supply state. The battery 61 is a first power source, and the commercial power source 56 is an example of a second power source. The control circuit 17 is an example of a first power feeding unit, a control unit, and a setting unit. The first target pressure and the second target pressure are examples of the target pressure. The battery 61 is an example of a DC power source, and the commercial power source 56 is an example of an AC power source. The power supply unit 51 is an example of a second power supply unit. The pneumatic tools 64A and 64B are examples of external equipment. The pressure accumulating unit 15 is an example of a distribution mechanism. The adapter 62 is an example of a first connector, the adapter 57 is an example of a second connector, and the adapter 60 is an example of a third connector.

  The air compressor of this indication is not limited to the above-mentioned embodiment, and can be variously changed in the range which does not deviate from the gist. For example, in the air compressor 10 according to the first and second embodiments, the microcomputer 19 sets a power source that processes the signal of the determination circuit 21 and supplies power to the electric motor 13. In addition, when the operator operates the operation panel 24 to set the target pressure, the microcomputer 19 can set a power source that processes the signal of the determination circuit 21 and supplies power to the electric motor 13. is there.

  It is also possible to provide a first adapter sensor that detects whether the adapter 62 is connected to the adapter 23 and a second sensor that detects whether the adapter 59 is connected to the adapter 22. . The microcomputer 19 can set a power source for supplying power to the electric motor 13 by processing signals from the first adapter sensor and the second adapter sensor.

  Further, the commercial power source 56 can be connected to the adapter 22 by bypassing the power supply unit 51. The connection tool only needs to be able to be connected and disconnected from each other. The connection tool includes an adapter, a connector, a socket, and a coupler. The battery 61 may be a primary battery instead of a secondary battery. The first power supply unit, the control unit, and the setting unit may be a single electric component or an electronic component, or may be a unit having a plurality of electrical components or a plurality of electronic components. The electrical component or electronic component includes a processor, a control circuit, and a module.

  In addition to the pneumatic tool, the external facility may be a facility that injects compressed air into the air passage of the pneumatic device to check for leakage. The gas compressed by the compression unit includes air and inert gas. The inert gas includes nitrogen gas and noble gas. The power supply state of the power supply includes a current value in addition to the voltage. In this case, the setting unit sets the target pressure according to the current value of the power source that supplies power to the motor.

  DESCRIPTION OF SYMBOLS 10 ... Air compressor (gas compressor), 12 ... Tank part, 13 ... Electric motor (motor), 14 ... Compression part, 15 ... Accumulation part (distribution mechanism), 17 ... Control circuit (1st electric power feeding part, control part) , Setting unit), 25 ... first compression unit, 26 ... second compression unit, 51 ... power supply unit (second power supply unit), 56 ... commercial power supply (second power supply), 57 ... adapter (second connection tool), 58 ... Power cord, 60 ... Adapter (third connection tool), 61 ... Battery (first power supply), 62 ... Adapter (first connection tool), 64A, 64B ... Pneumatic tool (external equipment).

Claims (15)

A gas compressor having a motor that is rotated by being supplied with electric power, and a compression unit that is operated by the rotational force of the motor to compress and discharge the gas,
A first power supply unit that supplies power to one of the power sources of the first power source and the second power source different from each other in the power supply state to the motor;
A control unit that stops the compression unit according to a target pressure of the gas discharged from the compression unit;
A setting unit that sets the target pressure according to the power source that supplies power to the motor;
A gas compressor.   The gas compressor according to claim 1, wherein the control unit stops the motor and stops the compression unit. The first power source includes a DC power source that can be charged and discharged;
The gas compressor according to claim 1, wherein the second power source includes an AC power source having a voltage higher than that of the DC power source. The target pressure is
A first target pressure that is set when power of the first power source is supplied to the motor;
A second target pressure that is set when power of the second power source is supplied to the motor and that is higher than the first target pressure;
The gas compressor according to claim 3, comprising:   The gas compressor according to claim 4, wherein a tank unit for storing the gas discharged from the compression unit is provided.   The gas compressor according to claim 5, wherein the tank unit includes a second power feeding unit that sends electric power of the second power source to the first power feeding unit.   The gas compressor according to claim 6, further comprising a distribution mechanism that sends the gas discharged from the compression unit to at least one of the tank unit or an external facility that uses the gas.   The gas compressor according to claim 7, wherein the tank unit can be attached to and detached from the distribution mechanism.   The gas compressor according to claim 8, wherein the first power supply unit supplies electric power of the first power source to the motor in a state where the tank unit is detached from the distribution mechanism.   The gas compression according to claim 8, wherein the first power supply unit supplies power of the second power source to the motor via the second power supply unit in a state where the tank unit is attached to the distribution mechanism. Machine. The second power feeding unit sends the power of the second power source to the first power feeding unit,
The gas compressor according to claim 7, wherein the first power supply unit charges the first power source with electric power sent from the second power supply unit when the motor is stopped. The compression unit is
A first compression section for compressing and discharging the gas;
A second compression section for further compressing and discharging the gas discharged from the first compression section;
Have
The first power feeding unit is configured such that the tank unit is attached to the distribution mechanism, and the gas discharged from the first compression unit is further compressed and discharged by the second compression unit. The gas compressor according to claim 8, wherein power from a power source is supplied to the motor. The compression unit includes a first compression unit and a second compression unit that compress and discharge the gas, and are arranged in parallel with each other in the gas flow direction,
In the first power feeding unit, the electric power of the first power source is supplied to the motor in a state where the tank unit is removed from the distribution mechanism and the first compression unit and the second compression unit discharge the gas. The gas compressor according to claim 8 to be supplied. The second power supply unit can attach and detach the first power source,
The gas compressor according to claim 6, wherein the second power feeding unit charges the first power source with the power of the second power source. A first connector provided in the first power source and electrically connected to the first power feeding unit;
A second connector electrically connected to the second power feeding unit;
A power cord connecting the first power feeding unit and the second power feeding unit;
A third connector provided on the power cord and connected to the second connector;
Have
The gas compressor according to claim 6, wherein the second connector is connectable to either the first connector or the third connector.

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