WO2011125681A1 - Booster compressor integral with motor - Google Patents

Booster compressor integral with motor Download PDF

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Publication number
WO2011125681A1
WO2011125681A1 PCT/JP2011/057908 JP2011057908W WO2011125681A1 WO 2011125681 A1 WO2011125681 A1 WO 2011125681A1 JP 2011057908 W JP2011057908 W JP 2011057908W WO 2011125681 A1 WO2011125681 A1 WO 2011125681A1
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WO
WIPO (PCT)
Prior art keywords
motor
cooling air
capacitor
casing
booster compressor
Prior art date
Application number
PCT/JP2011/057908
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French (fr)
Japanese (ja)
Inventor
弘 井上
健一 小林
Original Assignee
アネスト岩田株式会社
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Filing date
Publication date
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Publication of WO2011125681A1 publication Critical patent/WO2011125681A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/066—Cooling by ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/128—Crankcases

Definitions

  • the present invention relates to a motor-integrated booster compressor.
  • Patent Document 1 a cylinder in which a piston reciprocates to form a compression space, a crank casing that forms a crank chamber, and an electric motor casing in which an electric motor that drives a crank shaft provided in the crank chamber is arranged.
  • a reciprocating compressor configured as described above is disclosed.
  • This compressor has a mechanism in which compressed gas is sucked from a suction port provided in an electric motor casing, and the sucked compressed gas is introduced into a compression space from a crank chamber and pressurized.
  • the configuration of the compressor will be described with reference to FIG.
  • an oil-free reciprocating compressor 100 includes a cylinder casing 102 that houses a cylinder 108 and a piston 110, a crank casing 104 that forms a crank chamber r, and an electric motor casing 106 that houses an electric motor 112. Together.
  • the output shaft of the electric motor 112 is connected to a crankshaft 114, and the crankshaft 114 is rotatably supported by a non-lubricated bearing 118 provided in the crank casing 104 and a partition wall 116 that partitions the crank casing 104 and the electric motor casing 106.
  • the non-lubricated bearing 118 is configured by a ceramic ball non-lubricated ball bearing or the like.
  • Piston 110 is connected to crankshaft 114 via piston rod 120 and non-lubricated bearing 118, and reciprocates inside cylinder 108 to pressurize compressed gas.
  • a self-lubricating piston ring 122 is provided.
  • a suction port 124, a suction valve 126, a discharge port 128, and a discharge valve 130 are provided at the head of the cylinder casing 102.
  • a suction port 132 is formed in the motor casing 106, a through hole 134 is formed in the partition wall 116, and a passage 136 is formed in the cylinder 108 in the axial direction of the cylinder 108.
  • the compression space c When the piston 110 moves up in the cylinder 108, the compression space c is pressurized, and the compressed gas opens the discharge valve 130 and is discharged from the discharge port 128.
  • the compressor having this configuration since the motor 112 and the crank chamber r are cooled by the compressed gas, overheating of the bearings of the motor 112 and the crank chamber r can be prevented.
  • the compressed gas In a compressor in which the compressed gas is not filled in the crank chamber r, there is a possibility that outside air flows into the compression space c from the crank chamber r.
  • the compressor having the above configuration is used as it is as a booster compressor (the configuration used as the booster compressor is novel)
  • the crank chamber r is filled with the compressed gas, so that the outside air enters the compression space c.
  • the flow does not flow, and the concentration of the compressed gas can be prevented from lowering.
  • pressure is applied to the piston from below the piston during intake, the torque fluctuation of one rotation of the electric motor 112 is reduced. Therefore, there are advantages such as preventing an increase in the current value of the motor 112 and avoiding an increase in the size of the motor 112.
  • Patent Document 2 also discloses a compressor having a configuration similar to that of Patent Document 1.
  • a compressed gas inlet pipe is connected to the crank chamber, pressurized gas is supplied from the inlet pipe to the crank chamber, and the pressurized gas in the crank chamber is passed through the passage similar to the passage 136.
  • the booster compressor of the structure introduce
  • a single-phase low voltage with a small starting torque for example, an electric motor of 100V is often used.
  • the electric motor includes a speed control mechanism in the drive circuit.
  • a starting capacitor and an operating capacitor are incorporated in parallel in the drive circuit, and the motor is driven by the starting capacitor at the time of starting when the rotational torque of the motor is large.
  • the electric motor is driven by switching to an operating capacitor.
  • a mechanical centrifugal governor switch is often used as a switch for switching these capacitors.
  • centrifugal force governor switch In this centrifugal force governor switch, the movable part of the centrifugal force governor is attached to the rotor shaft of the electric motor, and the switch is fixed to the outer parts of the electric motor.
  • the governor When the rotor shaft of the electric motor rotates, the governor is opened by centrifugal force, and the governor presses a switch to perform switching. At this time, a spark may occur in the switch portion.
  • an internal pressurizing booster compressor that sucks compressed gas pressurized through an opening provided in an electric motor casing, pressurizes a crank chamber, and sends the compressed gas to a compression space. Then, when the compressed gas is air, the oxygen contained in the pressurized air introduced into the electric motor increases the absolute amount of oxygen by the pressurized amount, and this spark causes the spark to switch contact. Adversely affect.
  • the present invention eliminates the adverse effects of sparks and the like generated at the switch portion of the governor of the motor, facilitates the installation of the speed control mechanism, and maintains the motor cooling efficiency high.
  • the task is to do.
  • the electric motor integrated booster compressor of the present invention is A cylinder that forms a compression space, a crank casing that forms a crank chamber, and an electric motor casing that includes an electric motor that drives a crankshaft provided in the crank chamber are integrally configured, and the cylinder and the crank chamber communicate with each other.
  • the motor is a single-phase motor, and a drive circuit that drives the single-phase motor includes a startup capacitor and a steady-state operation capacitor that are arranged in parallel, and an electronic governor that switches and connects these capacitors.
  • a starting capacitor, an operating capacitor, and an electronic governor are arranged outside the motor casing.
  • the starting torque is small as the electric motor, but a 100V power supply other than the industrial 200V can be used by using a single-phase electric motor.
  • the electronic governor can be arranged outside the motor casing away from the rotating shaft of the electric motor by using an electronic governor instead of the centrifugal force governor switch as a switch for switching between the starting capacitor and the operating capacitor. It becomes possible. As a result, the above-mentioned problems such as burning and wear of the switch contacts can be solved.
  • the motor casing can be reduced in size, and it is possible to prevent the electric motor from being damaged due to the conductive wire being entangled with the rotating portion of the motor. Furthermore, the electronic governor can be easily maintained and inspected by disposing the electronic governor outside the motor casing.
  • the communication passage that connects the cylinder and the crank chamber is formed by a communication pipe that connects the cylinder and the crank chamber, or is provided in the cylinder wall as in the passage 136 of FIG. It may be a communication path.
  • a cooling device for forming a cooling air flow along the outer surface of the motor casing is provided, but in the device of the present invention, the starting capacitor, the operating capacitor, and the electronic governor do not disturb the cooling air flow, and It is good to arrange
  • the motor casing is disposed laterally with respect to the crank casing
  • the cooling device is disposed above the motor casing
  • the cooling air flow discharged from the cooling device is a cylinder.
  • the lead wire connected to the motor is led out from the side wall of the motor casing on the side away from the crank casing, and the starting capacitor, the steady operation capacitor, and the electronic governor are disposed adjacent to the side wall. It is good to be done.
  • the cooling device is arranged above the motor casing, and the cooling air flow discharged from the cooling device is directed obliquely downward toward the cylinder side. Can cool at the same time.
  • the starting capacitor, the operating capacitor, and the electronic governor can be provided inside the motor casing and outside the motor casing close to the conductor connecting portion of the motor, the conductors can be easily arranged.
  • the arrangement of the devices is facilitated, and since these devices do not hinder the cooling air flow, the cooling effect of the crank chamber and the motor can be maintained high.
  • the motor casing has a circular cross section, the cooling air flow is formed along the outer peripheral surface of the motor casing, the starting capacitor, the operating capacitor and the electronic governor face the cooling air flow; It is good to arrange
  • the devices are arranged facing the cooling air flow, the devices can be cooled, and the devices do not obstruct the cooling air flow, so that the cooling effect of the motor is kept high. it can.
  • a cylinder that forms a compression space, a crank casing that forms a crank chamber, and an electric motor casing in which an electric motor that drives a crankshaft provided in the crank chamber is disposed. It is configured as a single unit and has a communication passage that connects the cylinder and the crank chamber. The compressed gas introduced into the crank chamber is supplied into the cylinder through the communication passage and pressurized, and the piston ring is made of self-lubricating resin.
  • An oilless type motor-integrated booster compressor configured, wherein the motor is a single-phase motor, and a drive circuit for driving the single-phase motor includes a startup capacitor and a steady-state operation capacitor arranged in parallel,
  • the electronic governor that switches and connects these capacitors, and the starting capacitor, the operating capacitor, and the electronic governor are motorized. Since it is arranged outside the casing, it is possible to use commercial power sources other than industrial power sources, eliminate the adverse effects of oxygen contained in the pressurized air, and prevent problems such as burning and wear of switch contacts. Can be resolved. Furthermore, the compressed gas does not inhale dust due to sparks generated by the governor switch provided in the motor casing, and the compressed gas is not contaminated.
  • the motor casing can be reduced in size, and the electric wire can be prevented from being entangled with the rotating portion of the motor, thereby causing the motor to break down. Furthermore, the electronic governor can be easily maintained and inspected by disposing the electronic governor outside the motor casing.
  • (A) is a cooling air flow path figure which concerns on 2nd Embodiment of the booster compressor of this invention
  • (B) is a cooling air flow path figure of the modification of 2nd Embodiment. It is a cooling air flow-path figure concerning 3rd Embodiment of the booster compressor of this invention. It is a cooling air flow-path figure concerning 4th Embodiment of the booster compressor of this invention.
  • the booster compressor 10 of the present embodiment includes a cover 12, a cylinder 14, a crankcase 16 that forms a crank chamber r, and an electric motor case 18 that incorporates an electric motor 20. It is connected.
  • the motor case 18 has a hermetically sealed structure and is arranged side by side at the same height with respect to the crankcase 16.
  • a casing 22 forming a cylinder head is connected to the upper portion of the cylinder 14.
  • a piston 24 is slidably disposed.
  • the piston 24 is equipped with a self-lubricating piston ring 26 having the above-described configuration, and seals between the inner surface of the cylinder.
  • the piston 24 is connected to the crankshaft 32 via the piston rod 28 and the grease lubricated bearing 30 having the above-described configuration.
  • the crankshaft 32 is connected to the output shaft 34 of the electric motor 20.
  • a grease lubricated bearing 38 is provided in the partition wall 36 that partitions the crank chamber r and the motor chamber m, and the crankshaft 32 is rotatably supported by the grease lubricated bearings 30 and 38.
  • a grease lubricated bearing 42 is provided on the side wall 40 of the motor case 18 on the side away from the crankcase 16, and the other end of the output shaft 34 is rotatably supported by the grease lubricated bearing 42.
  • a through hole 44 is formed in the partition wall 36.
  • a compressed air supply pipe 46 is connected to the crankcase 16.
  • a suction port 48 and a discharge port 50 are provided in the upper part of the cylinder 14, and a discharge valve 52 is provided at the outlet of the discharge port 50.
  • a communication pipe 54 that communicates the crank chamber r and the suction port 48 is provided.
  • compressed air that is pressurized from the compressed air supply pipe 46 to the crank chamber r is introduced.
  • the pressurized air introduced into the crank chamber r enters the electric motor chamber m through the through hole 44, brings the electric motor chamber m into a pressurized state, and cools the electric motor 20.
  • the compressed air in the crank chamber r is introduced into the compression space c through the communication pipe 54 and the suction port 48.
  • the compressed air further pressurized in the compression space c is discharged through the discharge port 50.
  • An open region 12 a is formed in the cover 12 facing the side wall 40 of the motor case 18.
  • the speed regulating mechanism 60 of the electric motor 20 is provided in the open area 12a.
  • the speed regulating mechanism 60 includes a starting capacitor 62, a steady operation capacitor 64, an electronic governor 66, and a conductive wire 68 connecting them.
  • a lead wire 68 connected to the motor 20 inside the motor case 18 is a portion of the connector 70 provided on the partition wall 40 of the motor case 18 and penetrates the side wall 40 and is led to the outside of the motor case 18. .
  • FIG. 3 shows an electric circuit connected to the electric motor 20.
  • a starting capacitor 62 and an operating capacitor 64 are connected in parallel to the conductive wire 68.
  • the lead wire 68 can be switched to the starting capacitor 62 or the operating capacitor 64 by the switch 67 of the electronic governor 66.
  • a single-phase 100 V AC power source 72 is connected to the conductive wire 68.
  • an electric fan 74 is provided above the motor case 18.
  • the electric fan 74 is disposed such that its discharge port 76 is obliquely directed toward the cylinder 14 and is also obliquely directed to the upper surface of the electric motor case 18.
  • the cooling air a discharged from the electric fan 74 strikes the electric motor case 18 having a circular outer surface obliquely. A part of the cooling air a flows downward along the outer surface of the electric motor case 18, and cools the electric motor case 18 and the electric motor 20 disposed inside the electric motor case 18.
  • the other cooling air a goes to the cylinder 14 and the casing 22 to cool them.
  • the electric motor 20 can be operated using a commercial power source even in a place where a 200V power source is not laid.
  • the speed regulating mechanism 60 including the starting capacitor 62, the operating capacitor 64, the electronic governor 66, and the like is disposed outside the motor case 18, the increased amount of oxygen contained in the pressurized compressed air is used. It is possible to avoid problems such as burning and wear of switch contacts.
  • the discharge port 76 of the electric fan 74 is disposed obliquely toward the cylinder 14, the cylinder 14 and the motor case 18 can be simultaneously cooled by the cooling air a discharged from the discharge port 76.
  • the speed control mechanism 60 is provided in the position away from the cooling air a discharged from the electric fan 74, the speed control mechanism 60 does not inhibit the flow of the cooling air a. Therefore, since the cooling air a can form a cooling air flow along the outer peripheral surface of the motor case 18 or the cylinder 14, these cooling effects can be maintained high.
  • This embodiment is a case where the present invention is applied to a booster compressor having a configuration in which the electric motor case 18 has a sealed structure and air to be compressed is introduced into the crankcase 16.
  • a booster compressor having a configuration in which compressed air is introduced from an opening provided in the motor case 18, the motor 20 is cooled with the compressed air, and then the compressed air is introduced into the crank chamber through a through hole. It can also be applied to.
  • the arrangement of the electronic governor 66 in the speed control mechanism 60 is the same as that of the present embodiment, and the start-up capacitor 62 and the operation capacitor 64 do not obstruct the flow of the cooling air a. You may make it arrange
  • a communication path that connects the crank chamber r and the compression space c may be provided in the wall surface of the cylinder 14.
  • FIGS. 4 to 6 including a device illustrated as a comparative example (a new technique in the comparative intermediate technology of the present invention).
  • 4 to 6 show an example in which an electric fan 82 is provided above an electric motor case 80 having a circular cross section.
  • FIG. 4 shows an arrangement example irrelevant to the device of the present invention, and the cooling air a discharged from the discharge port 84 of the electric fan 82 forms a cooling air flow along the outer peripheral surface of the electric motor case 80. Therefore, the motor case 80 is cooled well.
  • FIG. 5 shows an arrangement example of a starting capacitor and an operating capacitor as a comparative example, not the device of the present invention.
  • an activation capacitor 86 and an operation capacitor 88 are arranged in the flow of cooling air a discharged from the electric fan 82.
  • the axes of these capacitors are arranged in parallel with the axis of the motor case 80.
  • the condensers 86 and 88 obstruct the flow of the cooling air a, the cooling air flow is disturbed, and the condenser case 80 is separated from the outer peripheral surface of the motor case 80. Therefore, there arises a disadvantage that the cooling effect of the motor case 80 is lowered.
  • FIG. 6 (A) shows a second embodiment of the device of the present invention, which is an example in which the starting capacitor 86 and the operating capacitor 88 are arranged symmetrically below the central axis O of the motor case 80.
  • the axes of the capacitors 86 and 88 are arranged so as to be parallel to the central axis O of the motor case 80.
  • FIG. 6B is a modified example of the second embodiment, in which the capacitors 86 and 88 are arranged further downward while maintaining a symmetrical relationship with respect to the central axis O.
  • the capacitors 86 and 88 do not obstruct the cooling air a discharged from the electric fan 82 and the cooling air flow maintains the flow along the outer peripheral surface of the electric motor case 80 by arranging in this way, the electric motor case The cooling effect of 80 can be maintained well. Moreover, since the condensers 86 and 88 are disposed facing the cooling air flow, the condensers 86 and 88 are also cooled.
  • the starting capacitor 86 and the operating capacitor 88 are provided above the motor case 80 and directly below the center where the discharge port 84 of the electric fan 82 is not disposed.
  • the capacitors 86 and 88 are arranged in series in the axial direction of the motor case 80.
  • the condensers 86 and 88 do not hinder the flow of the cooling air a discharged from the discharge port 84, and a cooling air flow along the outer peripheral surface of the motor case 80 can be formed. Therefore, the cooling effect of the electric motor case 80 can be favorably maintained. Moreover, since the condensers 86 and 88 are disposed facing the cooling air flow, the condensers 86 and 88 are also cooled.
  • capacitors 86 and 88 are located directly below the discharge port 84 of the electric fan 82, but are disposed away from the outer peripheral surface of the electric motor case 80. Similarly to FIG. 5, the axes of the capacitors 86 and 88 are arranged so as to be parallel to the central axis O of the motor case 80.
  • the cooling air a is divided into two flows, a cooling air flow a1 and a cooling air flow a2. Therefore, the flow of the cooling air a is not hindered, and the cooling air flow a2 flows along the outer peripheral surface of the motor case 80, so that the cooling effect of the motor case 80 can be satisfactorily maintained. Moreover, since the condensers 86 and 88 are disposed facing the cooling air flow, the condensers 86 and 88 are also cooled.
  • the speed governing mechanism of the electric motor of the booster compressor is switched to the electronic governor and arranged outside the electric motor casing, so that the electronic governor is not affected by the environment inside the electric motor casing and can operate well.
  • the speed control mechanism can be easily attached.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

Disclosed is a unrefuel-type booster compressor integral with a motor, wherein a piston ring is composed of a self-lubricating resin, said piston ring being configured to supply gas to be compressed, which has been introduced to a crank chamber, to the inside of a cylinder through a communication path, to compress the gas. In a speed control mechanism (60), a centrifugal force governor is switched to an electronic governor (66). A starting capacitor (86), an operating capacitor (88), and the electronic governor (66), which constitute the speed control mechanism (60), are arranged on the outside of a motor case (18). Furthermore, these devices are arranged so as not to block the flow of cooling air (a) discharged from an electric fan (74), and the flow of cooling air is maintained so as to be along the outer peripheral surface of the motor case (18), so that the cooling effect of the motor case (18) can be maintained at a high level.

Description

電動機一体型ブースター圧縮機Electric motor integrated booster compressor
　本発明は、電動機一体型ブースター圧縮機に関する。 The present invention relates to a motor-integrated booster compressor.
　特許文献１には、ピストンが往復運動して圧縮空間を形成するシリンダと、クランク室を形成するクランクケーシングと、該クランク室に設けられたクランク軸を駆動する電動機を配置した電動機ケーシングとが一体に構成された往復式圧縮機が開示されている。この圧縮機は、電動機ケーシングに設けられた吸入口から被圧縮気体を吸入し、吸入した被圧縮気体をクランク室から圧縮空間に導入して加圧する仕組みとなっている。以下、この圧縮機の構成を図９で説明する。 In Patent Document 1, a cylinder in which a piston reciprocates to form a compression space, a crank casing that forms a crank chamber, and an electric motor casing in which an electric motor that drives a crank shaft provided in the crank chamber is arranged. A reciprocating compressor configured as described above is disclosed. This compressor has a mechanism in which compressed gas is sucked from a suction port provided in an electric motor casing, and the sucked compressed gas is introduced into a compression space from a crank chamber and pressurized. Hereinafter, the configuration of the compressor will be described with reference to FIG.
　図９において、無給油式往復動圧縮機１００は、内部にシリンダ１０８及びピストン１１０を収容したシリンダケーシング１０２と、クランク室ｒを形成するクランクケーシング１０４と、内部に電動機１１２を収容した電動機ケーシング１０６とが一体となっている。電動機１１２の出力軸はクランク軸１１４に連結され、クランク軸１１４は、クランクケーシング１０４及びクランクケーシング１０４と電動機ケーシング１０６とを仕切る隔壁１１６に設けられた無潤滑軸受１１８で回転自在に支持されている。無潤滑軸受１１８は、セラミック球無潤滑玉軸受等で構成されている。 In FIG. 9, an oil-free reciprocating compressor 100 includes a cylinder casing 102 that houses a cylinder 108 and a piston 110, a crank casing 104 that forms a crank chamber r, and an electric motor casing 106 that houses an electric motor 112. Together. The output shaft of the electric motor 112 is connected to a crankshaft 114, and the crankshaft 114 is rotatably supported by a non-lubricated bearing 118 provided in the crank casing 104 and a partition wall 116 that partitions the crank casing 104 and the electric motor casing 106. . The non-lubricated bearing 118 is configured by a ceramic ball non-lubricated ball bearing or the like.
　ピストン１１０は、ピストンロッド１２０及び無潤滑軸受１１８を介してクランク軸１１４に連結され、シリンダ１０８の内部を往復動して、被圧縮気体を加圧するピストン１１０には、フッ素樹脂やコプナ樹脂を母材にした自己潤滑ピストンリング１２２が設けられている。シリンダケーシング１０２の頭部には、吸入口１２４、吸入弁１２６及び吐出口１２８、吐出弁１３０が設けられている。電動機ケーシング１０６には吸入口１３２が穿設され、隔壁１１６には貫通孔１３４が穿設され、シリンダ１０８には、シリンダ１０８の軸方向に通路１３６が穿設されている。 Piston 110 is connected to crankshaft 114 via piston rod 120 and non-lubricated bearing 118, and reciprocates inside cylinder 108 to pressurize compressed gas. A self-lubricating piston ring 122 is provided. A suction port 124, a suction valve 126, a discharge port 128, and a discharge valve 130 are provided at the head of the cylinder casing 102. A suction port 132 is formed in the motor casing 106, a through hole 134 is formed in the partition wall 116, and a passage 136 is formed in the cylinder 108 in the axial direction of the cylinder 108.
　電動機１１２が作動し、クランク軸１１４の上下方向への往復運動によってピストン１１０が下降すると、圧縮空間ｃの圧力が小さくなる。そこで吸入弁１２６が開き、被圧縮気体が吸入口１３２から吸入されて、電動機ケーシング１０６内に入る。電動機ケーシング１０６内に入った被圧縮気体は、電動機１１２を冷却し、さらに貫通孔１３４を通してクランク室ｒに入り、無潤滑軸受１１８を冷却する。クランク室ｒに入った被圧縮気体は、通路１３６を経て吸入口１３２から圧縮空間ｃに吸入される。 When the motor 112 is operated and the piston 110 is lowered by the reciprocating motion of the crankshaft 114 in the vertical direction, the pressure in the compression space c decreases. Accordingly, the suction valve 126 is opened, and the compressed gas is sucked from the suction port 132 and enters the motor casing 106. The compressed gas that has entered the motor casing 106 cools the motor 112, and further enters the crank chamber r through the through hole 134 to cool the non-lubricated bearing 118. The compressed gas that has entered the crank chamber r is sucked into the compression space c from the suction port 132 through the passage 136.
　ピストン１１０がシリンダ１０８内を上昇すると、圧縮空間ｃが加圧され、被圧縮気体が吐出弁１３０を開き、吐出口１２８から吐出される。
　この構成の圧縮機では、被圧縮気体で電動機１１２やクランク室ｒを冷却しているので、電動機１１２やクランク室ｒの軸受等の過熱を防止できる。クランク室ｒに被圧縮気体が充填されない方式の圧縮機では、クランク室ｒから外気が圧縮空間ｃに流入するおそれがある。 When the piston 110 moves up in the cylinder 108, the compression space c is pressurized, and the compressed gas opens the discharge valve 130 and is discharged from the discharge port 128.
In the compressor having this configuration, since the motor 112 and the crank chamber r are cooled by the compressed gas, overheating of the bearings of the motor 112 and the crank chamber r can be prevented. In a compressor in which the compressed gas is not filled in the crank chamber r, there is a possibility that outside air flows into the compression space c from the crank chamber r.
　これに対し、前記構成の圧縮機をブースター圧縮機としてそのまま用いた場合（ブースター圧縮機として用いた構成は新規である）、クランク室ｒが被圧縮気体で満たされるので、外気が圧縮空間ｃに流入しなくなり、被圧縮気体の濃度低下を防止できる。また、吸気時にピストン下方からピストンに圧力が加わるので、電動機１１２の１回転のトルク変動が少なくなる。そのため、電動機１１２の電流値増加を防ぎ、電動機１１２のサイズアップを回避できる等の長所がある。 On the other hand, when the compressor having the above configuration is used as it is as a booster compressor (the configuration used as the booster compressor is novel), the crank chamber r is filled with the compressed gas, so that the outside air enters the compression space c. The flow does not flow, and the concentration of the compressed gas can be prevented from lowering. Further, since pressure is applied to the piston from below the piston during intake, the torque fluctuation of one rotation of the electric motor 112 is reduced. Therefore, there are advantages such as preventing an increase in the current value of the motor 112 and avoiding an increase in the size of the motor 112.
　特許文献２にも、特許文献１と類似した構成の圧縮機が開示されている。また、特許文献３には、クランク室に被圧縮気体送入管を接続し、該送入管からクランク室に加圧気体を供給し、クランク室内の加圧気体を前記通路１３６と同様な通路を通して圧縮空間ｃに導入し、圧縮空間ｃでさらに加圧して吐出する構成のブースター圧縮機が開示されている。 Patent Document 2 also discloses a compressor having a configuration similar to that of Patent Document 1. In Patent Document 3, a compressed gas inlet pipe is connected to the crank chamber, pressurized gas is supplied from the inlet pipe to the crank chamber, and the pressurized gas in the crank chamber is passed through the passage similar to the passage 136. The booster compressor of the structure introduce | transduced into the compression space c through and pressurizing and discharging further in the compression space c is disclosed.
特開平１－２５７７８０号公報JP-A-1-257780 特開２００７－５１６１５号公報JP 2007-51615 A 特開２００７－５１６１４号公報JP 2007-51614 A
　このような構成のブースター圧縮機には、起動トルクが小さい単相の低電圧、例えば１００Ｖの電動機がよく使用されることがある。また、電動機は駆動回路に調速機構を備えている。この調速機構は、該駆動回路に起動用コンデンサと運転用コンデンサとが並列に組み込まれ、電動機の回転トルクが大きい起動時に、起動用コンデンサで電動機を駆動し、比較的回転トルクが小さい定常運転時には、運転用コンデンサに切り替えて電動機を駆動するものである。これらのコンデンサを切り替えるスイッチには、機械式の遠心力ガバナースイッチがよく用いられている。 For a booster compressor having such a configuration, a single-phase low voltage with a small starting torque, for example, an electric motor of 100V is often used. In addition, the electric motor includes a speed control mechanism in the drive circuit. In this speed control mechanism, a starting capacitor and an operating capacitor are incorporated in parallel in the drive circuit, and the motor is driven by the starting capacitor at the time of starting when the rotational torque of the motor is large. At times, the electric motor is driven by switching to an operating capacitor. A mechanical centrifugal governor switch is often used as a switch for switching these capacitors.
　この遠心力ガバナースイッチは、遠心力ガバナーの可動部分は、電動機のロータ軸に取り付けられ、スイッチは電動機の外郭部品に固定されている。電動機のロータ軸が回転すると、遠心力でガバナーが開き、このガバナーがスイッチを押すことで切り替えが行なわれる。この時、スイッチ部分でスパークが発生することがある。 In this centrifugal force governor switch, the movable part of the centrifugal force governor is attached to the rotor shaft of the electric motor, and the switch is fixed to the outer parts of the electric motor. When the rotor shaft of the electric motor rotates, the governor is opened by centrifugal force, and the governor presses a switch to perform switching. At this time, a spark may occur in the switch portion.
　特許文献１や特許文献２に開示されたように、電動機ケーシングに設けられた開口などから加圧された被圧縮気体を吸入し、クランク室も加圧して圧縮空間に送る内部加圧型ブースター圧縮機では、被圧縮気体が空気の場合、電動機の内部に導入された加圧空気に含まれる酸素は、加圧された分だけ酸素の絶対量が増えており、この酸素によって、前記スパークがスイッチ接点に悪影響を及ぼす。 As disclosed in Patent Document 1 and Patent Document 2, an internal pressurizing booster compressor that sucks compressed gas pressurized through an opening provided in an electric motor casing, pressurizes a crank chamber, and sends the compressed gas to a compression space. Then, when the compressed gas is air, the oxygen contained in the pressurized air introduced into the electric motor increases the absolute amount of oxygen by the pressurized amount, and this spark causes the spark to switch contact. Adversely affect.
　例えば、スイッチ接点が焼けやすくなったり、スイッチが磨耗が激しくなったりするという問題が起こる。また、起動用コンデンサ及び運転用コンデンサの取付位置によっては、電動機を冷却している気体の流れを阻害して、被圧縮気体の冷却効率を低下させてしまうおそれがある。 For example, there are problems that the switch contacts are easily burned and that the switches are heavily worn. Further, depending on the mounting positions of the starting capacitor and the operating capacitor, the flow of the gas that cools the electric motor may be hindered, and the cooling efficiency of the compressed gas may be reduced.
　本発明は、かかる従来技術の課題に鑑み、電動機のガバナーのスイッチ部分で発生するするスパーク等による悪影響をなくすと共に、調速機構の取付けを容易にし、かつ電動機の冷却効率を高く維持できるようにすることを課題とする。 In view of the problems of the prior art, the present invention eliminates the adverse effects of sparks and the like generated at the switch portion of the governor of the motor, facilitates the installation of the speed control mechanism, and maintains the motor cooling efficiency high. The task is to do.
　かかる課題を解決するため、本発明の電動機一体型ブースター圧縮機は、
　圧縮空間を形成するシリンダと、クランク室を形成するクランクケーシングと、該クランク室に設けられたクランク軸を駆動する電動機を配置した電動機ケーシングとが一体に構成され、該シリンダとクランク室とを連通する連通路を備え、クランク室に導入した被圧縮気体を該連通路を通してシリンダ内に供給し加圧するようにし、ピストンリングが自己潤滑性樹脂で構成された無給油式の電動機一体型ブースター圧縮機であって、
　前記電動機が単相電動機であり、該単相電動機を駆動する駆動回路が、並列配置された起動用コンデンサ及び定常運転用コンデンサと、これらコンデンサを切り替え接続する電子ガバナーとを備え、
　起動用コンデンサ、運転用コンデンサ及び電子ガバナーが電動機ケーシングの外側に配置されてなるものである。 In order to solve such a problem, the electric motor integrated booster compressor of the present invention is
A cylinder that forms a compression space, a crank casing that forms a crank chamber, and an electric motor casing that includes an electric motor that drives a crankshaft provided in the crank chamber are integrally configured, and the cylinder and the crank chamber communicate with each other. An oil-free motor-integrated booster compressor in which the compressed gas introduced into the crank chamber is supplied into the cylinder through the communication passage and pressurized, and the piston ring is made of a self-lubricating resin. Because
The motor is a single-phase motor, and a drive circuit that drives the single-phase motor includes a startup capacitor and a steady-state operation capacitor that are arranged in parallel, and an electronic governor that switches and connects these capacitors.
A starting capacitor, an operating capacitor, and an electronic governor are arranged outside the motor casing.
　本発明装置では、電動機として、起動トルクは小さいが、単相電動機を用いることによって、工業用２００V以外の１００V電源も使用することができる。また、起動用コンデンサと運転用コンデンサとを切り換えるスイッチとして、遠心力ガバナースイッチに代わり、電子ガバナーを用いたことにより、この電子ガバナーを電動機の回転軸から離れた電動機ケーシングの外側に配置することが可能になる。これによって、スイッチ接点の焼けや磨耗等、前記不具合いを解消できる。 In the device of the present invention, the starting torque is small as the electric motor, but a 100V power supply other than the industrial 200V can be used by using a single-phase electric motor. In addition, the electronic governor can be arranged outside the motor casing away from the rotating shaft of the electric motor by using an electronic governor instead of the centrifugal force governor switch as a switch for switching between the starting capacitor and the operating capacitor. It becomes possible. As a result, the above-mentioned problems such as burning and wear of the switch contacts can be solved.
　また、電子ガバナーを電動機ケーシングの外側に配置したことで、電動機ケーシングを小型化できると共に、導線が電動機の回転部分に絡んだりして、電動機が故障するのを防止できる。さらに、電子ガバナーを電動機ケーシングの外部に配置することにより、電子ガバナーの保守・点検が容易になる。
　なお、本発明装置において、シリンダとクランク室とを連通する連通路は、シリンダとクランク室とを連結した連通管で構成されるか、あるいは図９の通路１３６のように、シリンダ壁内に設けられた連通路であってもよい。 In addition, by disposing the electronic governor on the outside of the motor casing, the motor casing can be reduced in size, and it is possible to prevent the electric motor from being damaged due to the conductive wire being entangled with the rotating portion of the motor. Furthermore, the electronic governor can be easily maintained and inspected by disposing the electronic governor outside the motor casing.
In the device of the present invention, the communication passage that connects the cylinder and the crank chamber is formed by a communication pipe that connects the cylinder and the crank chamber, or is provided in the cylinder wall as in the passage 136 of FIG. It may be a communication path.
　通常、電動機ケーシングの外表面に沿う冷却空気流を形成する冷却装置が設けられているが、本発明装置において、起動用コンデンサ、運転用コンデンサ及び電子ガバナーが、該冷却空気流を乱さず、該冷却空気流を維持可能な位置に配置されるようにするとよい。
　これによって、電子ガバナーが冷却装置の冷却効果を阻害しないので、電動機の冷却効果を高い状態で維持できる。 Usually, a cooling device for forming a cooling air flow along the outer surface of the motor casing is provided, but in the device of the present invention, the starting capacitor, the operating capacitor, and the electronic governor do not disturb the cooling air flow, and It is good to arrange | position in the position which can maintain a cooling air flow.
As a result, the electronic governor does not hinder the cooling effect of the cooling device, so that the cooling effect of the electric motor can be maintained in a high state.
　本発明装置において、前記構成に加えて、電動機ケーシングがクランクケーシングに対して横方向に配置され、冷却装置が電動機ケーシングの上方に配置されると共に、該冷却装置から吐出される冷却空気流がシリンダ側に向かって斜め下方に向けられ、クランクケーシングと離れた側の電動機ケーシングの側壁から電動機に接続された導線が導出され、該側壁に起動用コンデンサ、定常運転用コンデンサ及び電子ガバナーが、隣接配置されるようにするとよい。 In the device according to the present invention, in addition to the above configuration, the motor casing is disposed laterally with respect to the crank casing, the cooling device is disposed above the motor casing, and the cooling air flow discharged from the cooling device is a cylinder. The lead wire connected to the motor is led out from the side wall of the motor casing on the side away from the crank casing, and the starting capacitor, the steady operation capacitor, and the electronic governor are disposed adjacent to the side wall. It is good to be done.
　このように、冷却装置が電動機ケーシングの上方に配置されると共に、該冷却装置から吐出される冷却空気流がシリンダ側に向かって斜め下方に向けられるので、冷却空気流によってシリンダ及び電動機ケーシング等を同時に冷却できる。
　また、電動機ケーシングの内部で電動機の導線接続部と近接した電動機ケーシングの外部に、起動用コンデンサ、運転用コンデンサ及び電子ガバナーを設けることができるので、該導線の配設が容易になる。 In this way, the cooling device is arranged above the motor casing, and the cooling air flow discharged from the cooling device is directed obliquely downward toward the cylinder side. Can cool at the same time.
Moreover, since the starting capacitor, the operating capacitor, and the electronic governor can be provided inside the motor casing and outside the motor casing close to the conductor connecting portion of the motor, the conductors can be easily arranged.
　また、前記機器類の配置も容易になると共に、これら機器類が冷却空気流を阻害しないので、クランク室及び電動機の冷却効果を高く維持できる。 In addition, the arrangement of the devices is facilitated, and since these devices do not hinder the cooling air flow, the cooling effect of the crank chamber and the motor can be maintained high.
　本発明装置において、電動機ケーシングが円形断面を有し、冷却空気流が該電動機ケーシングの外周面に沿うように形成され、起動用コンデンサ、運転用コンデンサ及び電子ガバナーが該冷却空気流に面しかつ該冷却空気流を阻害しない位置に配置されるようにするとよい。 In the apparatus of the present invention, the motor casing has a circular cross section, the cooling air flow is formed along the outer peripheral surface of the motor casing, the starting capacitor, the operating capacitor and the electronic governor face the cooling air flow; It is good to arrange | position in the position which does not inhibit this cooling air flow.
　このように、前記機器類が冷却空気流に面して配置されるので、該機器類の冷却が可能になると共に、該機器類が冷却空気流を阻害しないので、電動機の冷却効果を高く維持できる。 As described above, since the devices are arranged facing the cooling air flow, the devices can be cooled, and the devices do not obstruct the cooling air flow, so that the cooling effect of the motor is kept high. it can.
　本発明の電動機一体型ブースター圧縮機によれば、圧縮空間を形成するシリンダと、クランク室を形成するクランクケーシングと、該クランク室に設けられたクランク軸を駆動する電動機を配置した電動機ケーシングとが一体に構成され、該シリンダとクランク室とを連通する連通路を備え、クランク室に導入した被圧縮気体を該連通路を通してシリンダ内に供給し加圧するようにし、ピストンリングが自己潤滑性樹脂で構成された無給油式の電動機一体型ブースター圧縮機であって、電動機が単相電動機であり、該単相電動機を駆動する駆動回路が、並列配置された起動用コンデンサ及び定常運転用コンデンサと、これらコンデンサを切り替え接続する電子ガバナーとを備え、起動用コンデンサ、運転用コンデンサ及び電子ガバナーが電動機ケーシングの外側に配置されてなるので、工業用電源以外の商用電源の利用が可能になると共に、加圧空気に含まれる酸素の悪影響を排して、スイッチ接点の焼けや磨耗等の不具合いを解消できる。
　更に、電動機ケーシングの内部に設けられたカバナースイッチで発生するスパークによる塵埃を、被圧縮気体が吸い込んで、被圧縮気体が汚染されることもなくなる。 According to the motor-integrated booster compressor of the present invention, a cylinder that forms a compression space, a crank casing that forms a crank chamber, and an electric motor casing in which an electric motor that drives a crankshaft provided in the crank chamber is disposed. It is configured as a single unit and has a communication passage that connects the cylinder and the crank chamber. The compressed gas introduced into the crank chamber is supplied into the cylinder through the communication passage and pressurized, and the piston ring is made of self-lubricating resin. An oilless type motor-integrated booster compressor configured, wherein the motor is a single-phase motor, and a drive circuit for driving the single-phase motor includes a startup capacitor and a steady-state operation capacitor arranged in parallel, The electronic governor that switches and connects these capacitors, and the starting capacitor, the operating capacitor, and the electronic governor are motorized. Since it is arranged outside the casing, it is possible to use commercial power sources other than industrial power sources, eliminate the adverse effects of oxygen contained in the pressurized air, and prevent problems such as burning and wear of switch contacts. Can be resolved.
Furthermore, the compressed gas does not inhale dust due to sparks generated by the governor switch provided in the motor casing, and the compressed gas is not contaminated.
　また、電子ガバナーを電動機ケーシングの外側に配置したことで、電動機ケーシングを小型化できると共に、導線が電動機の回転部分に絡んだりして、電動機が故障するのを防止できる。さらに、電子ガバナーを電動機ケーシングの外部に配置することにより、電子ガバナーの保守・点検が容易になる。 Also, by arranging the electronic governor on the outside of the motor casing, the motor casing can be reduced in size, and the electric wire can be prevented from being entangled with the rotating portion of the motor, thereby causing the motor to break down. Furthermore, the electronic governor can be easily maintained and inspected by disposing the electronic governor outside the motor casing.
本発明の無給油式のブースター圧縮機の第１実施形態に係る正面視断面図である。It is a front view sectional view concerning a 1st embodiment of the oilless booster compressor of the present invention. 前記第１実施形態の側面図である。It is a side view of the first embodiment. 前記第１実施形態の電動の調速機構の回路図である。It is a circuit diagram of the electric speed regulating mechanism of the first embodiment. 電動ファンから電動機ケースに向けて吐出される冷却空気の流路図である。It is a flow-path figure of the cooling air discharged toward an electric motor case from an electric fan. 比較例（本発明の比較用中間技術で新規な技術）として示された装置の冷却空気流路図である。It is a cooling air flow-path figure of the apparatus shown as a comparative example (technique novel in the intermediate technique for comparison of this invention). （Ａ）は本発明のブースター圧縮機の第２実施形態に係る冷却空気流路図であり、（Ｂ）は第２実施形態の変形例の冷却空気流路図である。(A) is a cooling air flow path figure which concerns on 2nd Embodiment of the booster compressor of this invention, (B) is a cooling air flow path figure of the modification of 2nd Embodiment. 本発明のブースター圧縮機の第３実施形態に係る冷却空気流路図である。It is a cooling air flow-path figure concerning 3rd Embodiment of the booster compressor of this invention. 本発明のブースター圧縮機の第４実施形態に係る冷却空気流路図である。It is a cooling air flow-path figure concerning 4th Embodiment of the booster compressor of this invention. 従来の往復動圧縮機をブースター圧縮機としてそのまま用いた比較例としての正面視断面図である。It is front view sectional drawing as a comparative example which used the conventional reciprocating compressor as it was as a booster compressor.
　以下、本発明を図に示した実施形態を用いて詳細に説明する。但し、この実施形態に記載されている構成部品の寸法、材質、形状、その相対配置などは特に特定的な記載がない限り、この発明の範囲をそれのみに限定する趣旨ではない。 Hereinafter, the present invention will be described in detail using embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention to that unless otherwise specified.
（実施形態１）
　本発明の電動機一体型ブースター圧縮機の第１実施形態を図１及び図２に基づいて説明する。図１及び図２において、本実施形態のブースター圧縮機１０は、カバー１２の内部に、シリンダ１４と、クランク室ｒを形成するクランクケース１６と、電動機２０を内蔵した電動機ケース１８とが一体に連結されている。電動機ケース１８は密閉構造をなし、クランクケース１６に対して同一高さに並んで配置されている。シリンダ１４の上部にはシリンダヘッドを形成するケーシング２２が連結されている。 (Embodiment 1)
A first embodiment of a motor-integrated booster compressor according to the present invention will be described with reference to FIGS. 1 and 2, the booster compressor 10 of the present embodiment includes a cover 12, a cylinder 14, a crankcase 16 that forms a crank chamber r, and an electric motor case 18 that incorporates an electric motor 20. It is connected. The motor case 18 has a hermetically sealed structure and is arranged side by side at the same height with respect to the crankcase 16. A casing 22 forming a cylinder head is connected to the upper portion of the cylinder 14.
　シリンダ１４の内部には、ピストン２４が摺動自在に配置されている。ピストン２４には、前述の構成をもつ自己潤滑ピストンリング２６が装着され、シリンダ内面との間をシールしている。ピストン２４は、ピストンロッド２８及び前述の構成をもつグリス潤滑軸受３０を介してクランク軸３２に接続されている。クランク軸３２は電動機２０の出力軸３４と連結されている。クランク室ｒとモータ室ｍとを仕切る隔壁３６にグリス潤滑軸受３８が設けられ、クランク軸３２は、グリス潤滑軸受３０及び３８により回転自在に支持されている。 In the cylinder 14, a piston 24 is slidably disposed. The piston 24 is equipped with a self-lubricating piston ring 26 having the above-described configuration, and seals between the inner surface of the cylinder. The piston 24 is connected to the crankshaft 32 via the piston rod 28 and the grease lubricated bearing 30 having the above-described configuration. The crankshaft 32 is connected to the output shaft 34 of the electric motor 20. A grease lubricated bearing 38 is provided in the partition wall 36 that partitions the crank chamber r and the motor chamber m, and the crankshaft 32 is rotatably supported by the grease lubricated bearings 30 and 38.
　また、クランクケース１６と離れた側の電動機ケース１８の側壁４０にグリス潤滑軸受４２が設けられ、出力軸３４の他端は、該グリス潤滑軸受４２によって回転自在に支持されている。隔壁３６には貫通孔４４が穿設されている。クランクケース１６には、被圧縮空気供給管４６が接続されている。また、シリンダ１４の上部には吸入口４８と吐出口５０とが設けられ、吐出口５０の出口には吐出弁５２が設けられている。また、クランク室ｒと吸入口４８とを連通する連通管５４が設けられている。 Also, a grease lubricated bearing 42 is provided on the side wall 40 of the motor case 18 on the side away from the crankcase 16, and the other end of the output shaft 34 is rotatably supported by the grease lubricated bearing 42. A through hole 44 is formed in the partition wall 36. A compressed air supply pipe 46 is connected to the crankcase 16. A suction port 48 and a discharge port 50 are provided in the upper part of the cylinder 14, and a discharge valve 52 is provided at the outlet of the discharge port 50. Further, a communication pipe 54 that communicates the crank chamber r and the suction port 48 is provided.
　かかる構成において、被圧縮空気供給管４６からクランク室ｒに加圧された被圧縮空気を導入する。クランク室ｒに導入された加圧空気は、貫通孔４４を通って電動機室ｍに入り、電動機室ｍを加圧状態にすると共に、電動機２０を冷却する。クランク室ｒの被圧縮空気は、連通管５４及び吸入口４８を通って圧縮空間ｃに導入される。圧縮空間ｃでさらに加圧された被圧縮空気は、吐出口５０を通って吐出される。 In such a configuration, compressed air that is pressurized from the compressed air supply pipe 46 to the crank chamber r is introduced. The pressurized air introduced into the crank chamber r enters the electric motor chamber m through the through hole 44, brings the electric motor chamber m into a pressurized state, and cools the electric motor 20. The compressed air in the crank chamber r is introduced into the compression space c through the communication pipe 54 and the suction port 48. The compressed air further pressurized in the compression space c is discharged through the discharge port 50.
　電動機ケース１８の側壁４０に対面するカバー１２に開放領域１２ａが形成されている。この開放領域１２ａに、電動機２０の調速機構６０が設けられている。調速機構６０は、起動用コンデンサ６２、定常運転用コンデンサ６４、電子ガバナー６６及びこれらを接続する導線６８とから構成されている。電動機ケース１８の内部で電動機２０に接続された導線６８は、電動機ケース１８の隔壁４０に設けられたコネクタ７０の部分で、該側壁４０を貫通して電動機ケース１８の外側に導設されている。 An open region 12 a is formed in the cover 12 facing the side wall 40 of the motor case 18. The speed regulating mechanism 60 of the electric motor 20 is provided in the open area 12a. The speed regulating mechanism 60 includes a starting capacitor 62, a steady operation capacitor 64, an electronic governor 66, and a conductive wire 68 connecting them. A lead wire 68 connected to the motor 20 inside the motor case 18 is a portion of the connector 70 provided on the partition wall 40 of the motor case 18 and penetrates the side wall 40 and is led to the outside of the motor case 18. .
　図３に、電動機２０に結線される電気回路を示す。図３において、導線６８に並列に起動用コンデンサ６２と運転用コンデンサ６４とが接続されている。電子ガバナー６６のスイッチ６７によって、導線６８が起動用コンデンサ６２又は運転用コンデンサ６４に切り替え可能になっている。また、導線６８に単相１００Ｖ交流電源７２が接続されている。 FIG. 3 shows an electric circuit connected to the electric motor 20. In FIG. 3, a starting capacitor 62 and an operating capacitor 64 are connected in parallel to the conductive wire 68. The lead wire 68 can be switched to the starting capacitor 62 or the operating capacitor 64 by the switch 67 of the electronic governor 66. A single-phase 100 V AC power source 72 is connected to the conductive wire 68.
　図１及び図２において、電動機ケース１８の上方には電動ファン７４が設けられている。電動ファン７４は、その吐出口７６がシリンダ１４の方向に斜めに向けられ、電動機ケース１８の上面に対しても斜めに向くように配置されている。電動ファン７４から吐出された冷却空気ａは、円形の外表面を有する電動機ケース１８に斜めに当る。冷却空気ａの一部は電動機ケース１８の外表面を伝って下方に流れ、電動機ケース１８及び電動機ケース１８の内部に配置された電動機２０を冷却する。他の冷却空気ａは、シリンダ１４及びケーシング２２に向かい、これらを冷却する。 1 and 2, an electric fan 74 is provided above the motor case 18. The electric fan 74 is disposed such that its discharge port 76 is obliquely directed toward the cylinder 14 and is also obliquely directed to the upper surface of the electric motor case 18. The cooling air a discharged from the electric fan 74 strikes the electric motor case 18 having a circular outer surface obliquely. A part of the cooling air a flows downward along the outer surface of the electric motor case 18, and cools the electric motor case 18 and the electric motor 20 disposed inside the electric motor case 18. The other cooling air a goes to the cylinder 14 and the casing 22 to cool them.
　本実施形態によれば、電動機２０の電源として単相１００Ｖの低圧交流電源７２を用いているので、２００V電源が敷設されていない場所でも、商用電源を用いて電動機２０を稼動できる。
　また、起動用コンデンサ６２、運転用コンデンサ６４及び電子ガバナー６６等からなる調速機構６０を電動機ケース１８の外側に配置しているので、加圧された被圧縮空気に含まれる増量した酸素による、スイッチ接点の焼けや摩耗等の不具合いを回避できる。 According to this embodiment, since the single-phase 100V low-voltage AC power source 72 is used as the power source of the electric motor 20, the electric motor 20 can be operated using a commercial power source even in a place where a 200V power source is not laid.
In addition, since the speed regulating mechanism 60 including the starting capacitor 62, the operating capacitor 64, the electronic governor 66, and the like is disposed outside the motor case 18, the increased amount of oxygen contained in the pressurized compressed air is used. It is possible to avoid problems such as burning and wear of switch contacts.
　また、電動ファン７４の吐出口７６がシリンダ１４に向かって斜めに配置されているので、吐出口７６から吐出される冷却空気ａによって、シリンダ１４及び電動機ケース１８等を同時に冷却できる。
　また、電動ファン７４から吐出される冷却空気ａとは離れた位置に調速機構６０が設けられているので、調速機構６０が冷却空気ａの流れを阻害しない。そのため、冷却空気ａが電動機ケース１８やシリンダ１４等の外周面に沿った冷却空気流を形成できるので、これらの冷却効果を高く維持できる。 Further, since the discharge port 76 of the electric fan 74 is disposed obliquely toward the cylinder 14, the cylinder 14 and the motor case 18 can be simultaneously cooled by the cooling air a discharged from the discharge port 76.
Moreover, since the speed control mechanism 60 is provided in the position away from the cooling air a discharged from the electric fan 74, the speed control mechanism 60 does not inhibit the flow of the cooling air a. Therefore, since the cooling air a can form a cooling air flow along the outer peripheral surface of the motor case 18 or the cylinder 14, these cooling effects can be maintained high.
　さらに、電動機２０の導線接続位置に近接した側壁４０の外側に調速機構６０を配置したことにより、導線６８の配設が容易になる。
　なお、本実施形態は、電動機ケース１８が密閉構造をなし、被圧縮空気をクランクケース１６に導入する構成のブースター圧縮機に本発明を適用した場合である。これに対し、被圧縮空気を電動機ケース１８にもうけた開口から導入し、この被圧縮空気で電動機２０を冷却した後、該被圧縮空気を貫通孔を経てクランク室に導入する構成のブースター圧縮機に適用することもできる。 Furthermore, the arrangement of the conductor 68 is facilitated by arranging the speed control mechanism 60 outside the side wall 40 close to the conductor connection position of the electric motor 20.
This embodiment is a case where the present invention is applied to a booster compressor having a configuration in which the electric motor case 18 has a sealed structure and air to be compressed is introduced into the crankcase 16. On the other hand, a booster compressor having a configuration in which compressed air is introduced from an opening provided in the motor case 18, the motor 20 is cooled with the compressed air, and then the compressed air is introduced into the crank chamber through a through hole. It can also be applied to.
　また、本実施形態の変形例として、調速機構６０のうち、電子ガバナー６６の配置は本実施形態と同一とし、起動用コンデンサ６２及び運転用コンデンサ６４を冷却空気ａの流れを阻害しないカバー１２の内側隅部に配置固定するようにしてもよい。
　また、連通管５４の代わりに、シリンダ１４の壁面内に、クランク室ｒと圧縮空間ｃとを連通する連通路を設けるようにしてもよい。 Further, as a modification of the present embodiment, the arrangement of the electronic governor 66 in the speed control mechanism 60 is the same as that of the present embodiment, and the start-up capacitor 62 and the operation capacitor 64 do not obstruct the flow of the cooling air a. You may make it arrange | position and fix to the inner corner part.
Further, instead of the communication pipe 54, a communication path that connects the crank chamber r and the compression space c may be provided in the wall surface of the cylinder 14.
（実施形態２）
　次に、比較例（本発明の比較用中間技術で新規な技術）として図示された装置を含めて、本発明装置の第２実施形態を図４～図６により説明する。図４～図６は、円形断面をもつ電動機ケース８０の上方に電動ファン８２が設けられている例を示している。図４は、本発明装置とは無関係な配置例を示し、電動ファン８２の吐出口８４から吐出された冷却空気ａは、電動機ケース８０の外周面に沿った冷却空気流を形成する。そのため、電動機ケース８０は良好に冷却される。 (Embodiment 2)
Next, a second embodiment of the device of the present invention will be described with reference to FIGS. 4 to 6 including a device illustrated as a comparative example (a new technique in the comparative intermediate technology of the present invention). 4 to 6 show an example in which an electric fan 82 is provided above an electric motor case 80 having a circular cross section. FIG. 4 shows an arrangement example irrelevant to the device of the present invention, and the cooling air a discharged from the discharge port 84 of the electric fan 82 forms a cooling air flow along the outer peripheral surface of the electric motor case 80. Therefore, the motor case 80 is cooled well.
　図５は、本発明装置ではなく、比較例としての起動用コンデンサ及び運転用コンデンサの配置例を示す。図５において、電動ファン８２から吐出される冷却空気ａの流れの中に、起動用コンデンサ８６と運転用コンデンサ８８とが配置されている。これらコンデンサは、その軸線が電動機ケース８０の軸線と平行に配置されている。この比較例では、コンデンサ８６，８８が冷却空気ａの流れを阻害し、冷却空気流が乱れて、電動機ケース８０の外周面から離れてしまう。そのため、電動機ケース８０の冷却効果が低下する不都合が生じる。 FIG. 5 shows an arrangement example of a starting capacitor and an operating capacitor as a comparative example, not the device of the present invention. In FIG. 5, an activation capacitor 86 and an operation capacitor 88 are arranged in the flow of cooling air a discharged from the electric fan 82. The axes of these capacitors are arranged in parallel with the axis of the motor case 80. In this comparative example, the condensers 86 and 88 obstruct the flow of the cooling air a, the cooling air flow is disturbed, and the condenser case 80 is separated from the outer peripheral surface of the motor case 80. Therefore, there arises a disadvantage that the cooling effect of the motor case 80 is lowered.
　図６（Ａ）は、本発明装置の第２実施形態を示し、起動用コンデンサ８６及び運転用コンデンサ８８を、電動機ケース８０の中心軸Ｏの下方に左右対称に配置した例である。なお、図５と同様に、コンデンサ８６，８８の軸線は、電動機ケース８０の中心軸Ｏと平行となるように配置されている。図６（Ｂ）は、第２実施形態の変形例であり、コンデンサ８６，８８を、中心軸Ｏに対して左右対称に位置関係のまま、さらに下方に配置した例である。 FIG. 6 (A) shows a second embodiment of the device of the present invention, which is an example in which the starting capacitor 86 and the operating capacitor 88 are arranged symmetrically below the central axis O of the motor case 80. As in FIG. 5, the axes of the capacitors 86 and 88 are arranged so as to be parallel to the central axis O of the motor case 80. FIG. 6B is a modified example of the second embodiment, in which the capacitors 86 and 88 are arranged further downward while maintaining a symmetrical relationship with respect to the central axis O.
　このように、配置したことにより、コンデンサ８６，８８は電動ファン８２から吐出される冷却空気ａを阻害せず、冷却空気流が電動機ケース８０の外周面に沿った流れを維持するので、電動機ケース８０の冷却効果を良好に保持できる。また、コンデンサ８６，８８は、冷却空気流に面して配置されているので、コンデンサ８６，８８も冷却される。 Since the capacitors 86 and 88 do not obstruct the cooling air a discharged from the electric fan 82 and the cooling air flow maintains the flow along the outer peripheral surface of the electric motor case 80 by arranging in this way, the electric motor case The cooling effect of 80 can be maintained well. Moreover, since the condensers 86 and 88 are disposed facing the cooling air flow, the condensers 86 and 88 are also cooled.
（実施形態３）
　次に、本発明装置の第３実施形態を図７により説明する。図７において、起動用コンデンサ８６及び運転用コンデンサ８８は、電動機ケース８０の上方であって、電動ファン８２の吐出口８４が配置されていない中央部の真下に設けられている。また、コンデンサ８６，８８は、電動機ケース８０の軸線方向に直列に並べられている。 (Embodiment 3)
Next, a third embodiment of the device of the present invention will be described with reference to FIG. In FIG. 7, the starting capacitor 86 and the operating capacitor 88 are provided above the motor case 80 and directly below the center where the discharge port 84 of the electric fan 82 is not disposed. The capacitors 86 and 88 are arranged in series in the axial direction of the motor case 80.
　このような配置としたことにより、コンデンサ８６，８８が吐出口８４から吐出される冷却空気ａの流れを阻害せず、電動機ケース８０の外周面に沿った冷却空気流を形成できる。そのため、電動機ケース８０の冷却効果を良好に保持できる。また、コンデンサ８６，８８は、冷却空気流に面して配置されているので、コンデンサ８６，８８も冷却される。 With such an arrangement, the condensers 86 and 88 do not hinder the flow of the cooling air a discharged from the discharge port 84, and a cooling air flow along the outer peripheral surface of the motor case 80 can be formed. Therefore, the cooling effect of the electric motor case 80 can be favorably maintained. Moreover, since the condensers 86 and 88 are disposed facing the cooling air flow, the condensers 86 and 88 are also cooled.
（実施形態４）
　次に、本発明装置の第４実施形態を図８により説明する。図８において、コンデンサ８６，８８は、電動ファン８２の吐出口８４の真下であるが、電動機ケース８０の外周面から離して配置されている。また、図５と同様に、コンデンサ８６，８８の軸線は、電動機ケース８０の中心軸Ｏと平行となるように配置されている。 (Embodiment 4)
Next, a fourth embodiment of the device of the present invention will be described with reference to FIG. In FIG. 8, capacitors 86 and 88 are located directly below the discharge port 84 of the electric fan 82, but are disposed away from the outer peripheral surface of the electric motor case 80. Similarly to FIG. 5, the axes of the capacitors 86 and 88 are arranged so as to be parallel to the central axis O of the motor case 80.
　かかる配置としたことにより、冷却空気ａは、冷却空気流ａ１と冷却空気流ａ２の２つの流れに分流される。そのため、冷却空気ａの流れは阻害されず、冷却空気流ａ２が電動機ケース８０の外周面に沿って流れるので、電動機ケース８０の冷却効果を良好に保持できる。また、コンデンサ８６，８８は、冷却空気流に面して配置されているので、コンデンサ８６，８８も冷却される。 With this arrangement, the cooling air a is divided into two flows, a cooling air flow a1 and a cooling air flow a2. Therefore, the flow of the cooling air a is not hindered, and the cooling air flow a2 flows along the outer peripheral surface of the motor case 80, so that the cooling effect of the motor case 80 can be satisfactorily maintained. Moreover, since the condensers 86 and 88 are disposed facing the cooling air flow, the condensers 86 and 88 are also cooled.
　本発明によれば、ブースター圧縮機の電動機の調速機構を電子ガバナーに切り替えて、電動機ケーシングの外側に配置したので、電子ガバナーが電動機ケーシングの内部の環境に影響されず、良好に作動でき、かつ調速機構の取付けが容易になる。 According to the present invention, the speed governing mechanism of the electric motor of the booster compressor is switched to the electronic governor and arranged outside the electric motor casing, so that the electronic governor is not affected by the environment inside the electric motor casing and can operate well. In addition, the speed control mechanism can be easily attached.

Claims (4)

  1. 　圧縮空間を形成するシリンダと、クランク室を形成するクランクケーシングと、該クランク室に設けられたクランク軸を駆動する電動機を配置した電動機ケーシングとが一体に構成され、該シリンダとクランク室とを連通する連通路を備え、クランク室に導入した被圧縮気体を該連通路を通してシリンダ内に供給し加圧するようにし、ピストンリングが自己潤滑性樹脂で構成された無給油式の電動機一体型ブースター圧縮機であって、
    　前記電動機が単相電動機であり、該単相電動機を駆動する駆動回路が、並列配置された起動用コンデンサ及び定常運転用コンデンサと、これらコンデンサを切り替え接続する電子ガバナーとを備え、
    　前記起動用コンデンサ、定常運転用コンデンサ及び電子ガバナーが前記電動機ケーシングの外側に配置されてなることを特徴とする電動機一体型ブースター圧縮機。     A cylinder that forms a compression space, a crank casing that forms a crank chamber, and an electric motor casing that includes an electric motor that drives a crankshaft provided in the crank chamber are integrally configured, and the cylinder and the crank chamber communicate with each other. An oil-free motor-integrated booster compressor in which the compressed gas introduced into the crank chamber is supplied into the cylinder through the communication passage and pressurized, and the piston ring is made of a self-lubricating resin. Because
    The motor is a single-phase motor, and a drive circuit that drives the single-phase motor includes a startup capacitor and a steady-state operation capacitor that are arranged in parallel, and an electronic governor that switches and connects these capacitors.
    The motor-integrated booster compressor, wherein the starting capacitor, the steady operation capacitor, and the electronic governor are arranged outside the motor casing.
  2. 　電動機ケーシングの外表面に沿う冷却空気流を形成する冷却装置が設けられ、前記起動用コンデンサ、定常運転用コンデンサ及び電子ガバナーが、前記冷却空気流を乱さず、該冷却空気流を維持可能な位置に配置されたことを特徴とする請求項１に記載の電動機一体型ブースター圧縮機。 A cooling device that forms a cooling air flow along the outer surface of the motor casing is provided, and the start capacitor, the steady operation capacitor, and the electronic governor can maintain the cooling air flow without disturbing the cooling air flow. The electric motor-integrated booster compressor according to claim 1, wherein the booster compressor is integrated with the electric motor.
  3. 　前記電動機ケーシングがクランクケーシングに対して横方向に配置され、前記冷却装置が電動機ケーシングの上方に配置されると共に、該冷却装置から吐出される冷却空気流がシリンダ側に向かって斜め下方に向けられ、
    　クランクケーシングと離れた側の電動機ケーシングの側壁から電動機に接続された導線が導出され、該側壁に前記起動用コンデンサ、定常運転用コンデンサ及び電子ガバナーが、隣接配置されたことを特徴とする請求項２に記載の電動機一体型ブースター圧縮機。     The motor casing is disposed laterally with respect to the crank casing, the cooling device is disposed above the motor casing, and the cooling air flow discharged from the cooling device is directed obliquely downward toward the cylinder side. ,
    The lead wire connected to the motor is led out from the side wall of the motor casing remote from the crank casing, and the start-up capacitor, the steady operation capacitor, and the electronic governor are arranged adjacent to the side wall. 2. A motor-integrated booster compressor according to 2.
  4. 　前記電動機ケーシングが円形断面を有し、前記冷却空気流が該電動機ケーシングの外周面に沿うように形成され、前記起動用コンデンサ、定常運転用コンデンサ及び電子ガバナーが該冷却空気流に面しかつ該冷却空気流を阻害しない位置に配置されたことを特徴とする請求項２に記載の電動機一体型ブースター圧縮機。 The motor casing has a circular cross-section, and the cooling air flow is formed along an outer peripheral surface of the motor casing, the start-up capacitor, the steady operation capacitor and the electronic governor face the cooling air flow and the The electric motor-integrated booster compressor according to claim 2, wherein the booster compressor is disposed at a position where the cooling air flow is not obstructed.
PCT/JP2011/057908 2010-03-31 2011-03-29 Booster compressor integral with motor WO2011125681A1 (en)

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JP2010081818A JP5520113B2 (en) 2010-03-31 2010-03-31 Electric motor integrated booster compressor

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TWI661129B (en) * 2018-03-12 2019-06-01 吳榮哲 Structure and heat radiation method of air compressor

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JPS5518842A (en) * 1978-07-26 1980-02-09 Toshiba Corp Rotary compressor
JPS6019781U (en) * 1983-07-20 1985-02-09 三菱電機株式会社 Support device for horizontal electric compressor
JPS6429682A (en) * 1987-07-22 1989-01-31 Matsushita Electric Ind Co Ltd Compressor driving device
JPH01257780A (en) * 1988-04-05 1989-10-13 Mitsubishi Electric Corp Reciprocating compressor
JPH048880A (en) * 1990-04-25 1992-01-13 Matsushita Refrig Co Ltd Closed type electric compressor
JP2004124712A (en) * 2002-09-30 2004-04-22 Tokico Ltd Air compressor
JP2008202477A (en) * 2007-02-19 2008-09-04 Calsonic Kansei Corp Compressor
JP2009008099A (en) * 2008-10-14 2009-01-15 Hitachi Ltd Air compressor
JP2009013789A (en) * 2007-06-29 2009-01-22 Hitachi Ltd Compressor
JP2009281270A (en) * 2008-05-22 2009-12-03 Panasonic Corp Cover for electric component and its manufacturing method

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JPS5518842A (en) * 1978-07-26 1980-02-09 Toshiba Corp Rotary compressor
JPS6019781U (en) * 1983-07-20 1985-02-09 三菱電機株式会社 Support device for horizontal electric compressor
JPS6429682A (en) * 1987-07-22 1989-01-31 Matsushita Electric Ind Co Ltd Compressor driving device
JPH01257780A (en) * 1988-04-05 1989-10-13 Mitsubishi Electric Corp Reciprocating compressor
JPH048880A (en) * 1990-04-25 1992-01-13 Matsushita Refrig Co Ltd Closed type electric compressor
JP2004124712A (en) * 2002-09-30 2004-04-22 Tokico Ltd Air compressor
JP2008202477A (en) * 2007-02-19 2008-09-04 Calsonic Kansei Corp Compressor
JP2009013789A (en) * 2007-06-29 2009-01-22 Hitachi Ltd Compressor
JP2009281270A (en) * 2008-05-22 2009-12-03 Panasonic Corp Cover for electric component and its manufacturing method
JP2009008099A (en) * 2008-10-14 2009-01-15 Hitachi Ltd Air compressor

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