JPH03189386A - compressor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a compressor that converts rotational motion of an electric motor into reciprocating motion of a piston, and compresses gas by the reciprocating motion of the piston.

(Prior Art) Conventionally, as an example of the pressure ll1i11 as described above, the fifth
There is something like the one shown in the figure.

This compressor includes an electric motor 5 in which a stator 2 and a rotor 3 equipped with a coil 1 are assembled in a housing sink 4, a rotating member 7 attached to a shaft 6 of the rotor 3 protruding outside the housing 4 as described below, Electric power 11 via rotating member 7
The compressor main body 8 is driven by a shaft 6, and a fan 9 is attached to the tip of a shaft 6.

The rotating member 7 includes a disk-shaped flywheel 10 and an axis set eccentrically with respect to the axis of the flywheel 10.
A disc-shaped eccentric part 12 and a bearing 11 provided on the outer periphery are integrally formed. The rotating member 7 has a hole 13 located in the center of the flywheel 10 and into which the shaft 6 of the rotor 3 is inserted. It is installed on. Eccentric part 12
One end of a connecting rod 14 is attached to the connecting rod 14 via a bearing 11, and as the eccentric portion 12 rotates, a piston 15 of a compressor main body 8 attached to the other end of the connecting rod 14 reciprocates to compress the gas. In addition, the flywheel IO has a piston 15
In order to balance the reciprocating inertial force of the eccentric part 12, the rotational inertial force of the eccentric part 12, and the inertial force of the connecting rod 14, a notch 16 is formed in the peripheral edge of the connecting rod 14 to shift the center of gravity from the axis. For this reason, the flywheel 10 itself also serves as a balance weight.

In this compressor, when the electric motor 5 is operated, the flywheel 10 cannot suppress rotational fluctuations, so the shaft 6 rotates.
Along with this, the rotating member 7 rotates, and the piston 15 reciprocates via the eccentric portion 12 to compress the gas. At the same time, the rotation of the shaft 6 causes the fan 9 to rotate and generate wind, which is guided into the interior of the housing sink through the ventilation hole 4a formed in the housing 4 and inside the motor 5 (rotor 3, coil l).
) to cool down.

(Problem to be solved by the invention) However, in the conventional compressor described above, even if the fan 9 generates wind, most of this wind is blocked by the disk-shaped flywheel 10 and is used for cooling. Since the amount of heat is limited to the amount that goes around the flywheel 10, there is a problem that the electric motor 5 cannot be efficiently cooled.

The present invention was made to solve the above problems, and an object of the present invention is to provide a compressor that can efficiently cool an electric motor.

(Means for Solving the Problems) In order to achieve the above object, the present invention attaches a flywheel 18 to the shaft 6 of the electric motor 5 that drives the piston 15 of the compressor body 8 to suppress rotational fluctuations of the electric motor 5. , a compressor including a fan 9 positioned in front of the flywheel 18 and blowing air to the electric motor 5 to cool the electric motor 5, the flywheel 18 having a shaft portion fixed to the shaft 6 of the electric motor 5; 19, a plurality of arms 20 extending in the radial direction from the shaft portion 19 and formed in a shape to guide air flow from the fan 9 side to the electric motor 5 side, and these arms 2.
a ring-shaped flywheel main body 21 connected to the tip end of the ring-shaped flywheel body 21 and supported by the shaft part 19 via these arms 20;
It is characterized by having the following.

(Function) Since the present invention is configured as described above, the wind generated by the fan 9 passes between the arms and directly to the motor 5.
will be guided towards.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 4. Note that the same members as those shown in FIG. 5 are designated by the same reference numerals, and their explanations will be omitted.

In the figure, the rotating member 17 has a flywheel 18 formed integrally with the disc-shaped eccentric portion 12.
The flywheel 18 has a shaft portion 19 formed in the center thereof with a hole 13 into which the shaft 6 is inserted. The shaft portion 19 has a plurality of arms 20 extending in the radial direction formed around the shaft. This arm 20 is twisted into a blade shape so as to guide the flow of air from the fan 9 side to the electric motor 5 side. A flywheel main body 21 is formed by being connected to the tips of these arms 20. The flywheel body 21 has a notch 16 formed at its periphery so as to reduce fluctuations in the center of gravity between the flywheel 18 and the piston 15, and the flywheel 18 itself also serves as a balance weight. .

In the compressor configured as described above, when the electric motor 5 rotates, the eccentric portion 12 moves eccentrically, so that the piston 1
Compress the gas by making a reciprocating motion. At the same time, the fan 9 rotates to generate wind in the direction of the electric motor 5. Then, the arm 20 guides this wind directly between the arms 20 toward the electric motor 5, and into the house sink 4 through the ventilation hole 4a.
The inside of the electric motor 5 (rotor 3, coil 1) is cooled. In this way, a large amount of air generated by the fan 9 is blown to the electric motor 5, so that the electric motor can be efficiently cooled.

In this embodiment, the flywheel 18 and the eccentric portion I2 are integrated, but the present invention is not limited to this, and they may be configured separately. Further, although the flywheel 18 is similarly used as an example of a balance weight, the balance weight may be configured separately from the flywheel 18.

(Effects of the Invention) As explained above, the present invention guides the air generated by the fan directly to the electric motor through the arms or between the arms. As a result, the life of the motor can be improved.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a perspective view of the main part, FIG. 2 is a sectional view, FIG. 3 is a front view of the main part, and FIG. 4 is a main part. FIG. 5 is a sectional view showing an example of the conventional method. 5... Electric motor, 6... Shaft, fan, 15... Piston, 19... Shaft portion, 20... Arm, body.

Claims (1)

[Claims] (1) On the shaft of the electric motor that drives the piston of the compressor body,
Install a flywheel to suppress rotational fluctuations of the motor,
In a compressor including a fan positioned in front of the flywheel to blow air to the electric motor to cool the electric motor, the flywheel includes a shaft portion fixed to the shaft of the electric motor, and a fan extending radially from the shaft portion. A plurality of arms extend and are formed in a shape to guide air flow from the fan side to the electric motor side, and a ring-shaped arm that is connected to the tips of these arms and supported by the shaft part through these arms. A compressor characterized by comprising a flywheel body.