JPS61123774A - Reciprocating type compressor - Google Patents

Abstract

PURPOSE:To prevent liquid and oil from being sucked into a compressor through a suction pipe, and to restrain the compressor from vibrating, by disposing the suction pipe in the vicinity of a fan, and by fixing a blance weight integrally incorporated with a fan to one end part of a crankshaft. CONSTITUTION:A balance weight having a weight section 15a, fan attaching screw holes 15b and a gas vent hole 15c, is secured, by means of screws 16, to a crank eccentric section 6b in the upper section of a crankshaft 6 which is secured in its lower section with an oil pump 7 and a separator 7a. Further, a fan 17 is disposed in the vicinity of a suction pipe 12, and is secured to the balance weight by means of bolts 18. When an electrical motor 3 is energized, the crankshaft 6 intengrally incroporated with a rotor in the motor 3 is rotated so that pistons 9 are riciprocated by means of a cam 8 to compress gas. Further, the balance weight may restrain the compressor from vibrating while the fan 17 blows out return gas to prevent liquid and oil from being sucked into through the suction pipe 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a reciprocating compressor used in refrigerators, air conditioners, and the like.

Structure of the conventional example and its problems The conventional reciprocating compressor is based on the Japanese Patent Application Laid-open No. 57-3 shown in Fig. 3.
As known from No. 2088, a balance weight 33 was fixed to the end of a crankshaft 31 with a bolt 32.

In addition, in FIG. 3, 34 is a block, which supports the crankshaft 31 with a bearing 36 and supports the cylinder 3.
6 are integrally provided. A piston 37 is slidably inserted into the cylinder 36, and this piston 37 is connected to a stove throat 38 by a piston 39. The large end 38a of the connecting rod 38 is connected to the eccentric portion 31 of the crankshaft 31.
a, and the piston 37 reciprocates due to the rotational movement of the crankshaft 31. In the above configuration, the balance weight 33 is equipped with the weight portion 33a and the piston 33b that guides the oil. Since a fan could not be installed in this case, it was not possible to equalize the temperature inside the shell by separating the liquid during forming (the bubbling phenomenon of gas dissolved in oil) and stirring the gas inside the sealed case.

Purpose of the Invention Therefore, in order to eliminate the above drawbacks, the present invention improves the balance of a reciprocating compressor, prevents the compressor from sucking liquid when foaming occurs, and further equalizes the temperature inside the shell. purpose.

SUMMARY OF THE INVENTION To achieve this object, the present invention includes a balance weight that balances a reciprocating mass such as a piston of a reciprocating compressor, which is fixed to the end of the crankshaft, and a fan is fixed to the balance weight. A suction pipe of the compressor is arranged near the fan.

As the crankshaft rotates, the balance weight balances the reciprocating mass, suppressing the vibration of the compressor, and
By rotating the fan together with the balance weight, the temperature inside the shell is made more or less uniform, and the liquid in the gas is separated, so that no liquid is sucked from the suction pipe.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The example shows a reciprocating compressor called the Sentry Cam type. This system is described in 48 of ``Shin-hen Mechanical Basics J, November 1967 (Showa 42), 2nd edition, published by Rikogakusha.
It is introduced as an even-sized slider crank on page 8.21.

In FIGS. 1 and 2, 1 is the compressor main body, and inside the sealed case 2, there is an electric motor 3, a compression mechanism 4, and a refrigerating machine oil 6.
is built-in. Reference numeral 6 denotes a crankshaft having an oil pump 7 and a separator 7a press-fitted in its lower part and having a crank eccentric part 6a in its upper part. A cam 8 has an inner diameter fitted into the crank eccentric portion 6a and an outer diameter fitted into the piston 9. 1° is a cylinder C12 in which a piston 9 is inserted and a pulp plate 11 is attached to define a compression chamber 1Oa.
is press-fitted into the pulp plate 11' and the cylinder head 13
This is a suction pipe that communicates with the gas passage 14 of. A balance weight 16 has a weight portion 15a, a fan mounting screw hole 1sb, and a gas vent hole 15c, and is fixed to the crank eccentric portion 6a with a screw 16. 17 is arranged near the suction pipe 12, and is connected to the balance weight 1 by a bolt 18.
It is a fan fixed to 6.

In the above configuration, when the electric motor 3 is energized, the crankshaft 6 integrated with the rotor of the electric motor 3 rotates, and the piston 9 reciprocates via the cam 8 to compress the gas. The balance weight 15iC that balances the reciprocating mass of the piston 9 and the cam 8 suppresses vibrations of the compressor to a small level.

On the other hand, the gas caused by the foaminog phenomenon and the return gas from the refrigeration system are opened in a communication pipe (not shown), and if the above gas contains liquid and oil, they are removed by the centrifugal force caused by the 170 rotations of the fan. This prevents liquid or oil from being blown away and inhaled from the suction pipe 12.

Therefore, the vibration of the compressor can be suppressed to a low level, and since the compressor hardly absorbs liquid or oil, effects such as failures such as pulp breakage can be obtained.

Effects of the Invention As is clear from the above explanation, the present invention is such that a fan is fixed integrally with a balance weight that balances the reciprocating mass, and the fan is disposed near the suction pipe. Since no oil is inhaled, or even if it is, it is limited to a very small amount, the compressor's operation can be kept low. Further, it is possible to obtain effects such as preventing the compressor from causing a valve breakage accident.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the reciprocating compressor of the present invention, Fig. 2 is a plan view of the balance weight as seen from the ■-■ arrow in Fig. 1, and Fig. 3 is the balance weight of the conventional reciprocating compressor. FIG. 6...-Crankshaft, 6a...Crank eccentric part, 12...Suction pipe, 15...Balance weight, 15b...Balance weight Fan mounting screw hole. 17...Fan. Name of agent: Patent attorney Toshio Nakao and 1 other person
l11 1.5 Balance Quant 2nd Figure 3 (2I

Claims (1)

[Claims] A reciprocating type consisting of an eccentric crankshaft, a balance weight, a fan, and a suction pipe.The suction pipe is placed near the fan, and the balance weight to which the fan is integrally fixed is fixed to the end of the crankshaft. compressor.