JPS61178581A - Reciprocating type compressor - Google Patents

Abstract

PURPOSE:To improve the response performance of a suction lead valve and improve and gas charging efficiency in suction by operating the high pressure of the discharged gas into the suction lead valve so as to compulsorily open a suction lead valve. CONSTITUTION:A penetration hole 36 is formed onto a valve plate 29. One edge of the penetration hole 36 is opened at the position of a suction lead valve 27, and the other edge is opened at the position of a discharge lead valve 28. When the discharge lead valve 28 opens in the discharge process, also the other edge of the penetration hole 36 opens, and the pressure of the discharged gas is introduced into the penetration hole 36, while in the suction cycle, the pressure of the discharged gas in the penetration hole 36 opens the suction lead valve 27.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a reciprocating compressor used in a cooling system for a refrigerator, a cooling case, etc.

BACKGROUND OF THE INVENTION In recent years, there has been an increasing demand for improving the efficiency of compressors from the viewpoint of energy conservation. A conventional example will be explained below with reference to FIGS. 5 and 6.

In FIG. 6, 1 is a compressor unit consisting of a motor 3 and a compression mechanism. Reference numeral 6 denotes a cylinder constituting the compression mechanism 4, which includes a piston 6 reciprocated by the motor 3, a suction reed valve seat 7a having a suction reed valve 7 with lift processing (bending processing), and a valve having a discharge reed valve 8. Each of them is equipped with a plate 9.

In the above configuration, the gas in the cylinder 5 is compressed by the movement of the piston 6, and in the compression stroke, the gas in the cylinder 6 pushes up the discharge reed valve 8 and flows into the discharge chamber. In the suction process, the discharge reed valve 8 is closed, the suction reed valve 7 is opened, and low pressure gas is sucked into the cylinder 5.

Problem to be Solved by the Invention In this configuration, the suction stroke starts and the piston 6
Even if the valve starts to move to the right in the figure, the suction reed valve 7 remains in close contact with the valve plate 9 due to the viscous force of the oil, so it will not open until a considerable pressure difference is built up. Therefore, during the suction stroke, the time during which the suction reed valve 7 is actually open is short, and the gas filling efficiency of the cylinder 5 is poor, resulting in a reduction in performance.

SUMMARY OF THE INVENTION In view of the above drawbacks, it is an object of the present invention to provide a reciprocating compressor equipped with a valve mechanism with excellent responsiveness.

Means for Solving the Problems In order to solve these problems, the valve mechanism of the reciprocating compressor of the present invention has a suction reed valve on the cylinder side, a discharge reed valve on the opposite cylinder side, and one end is connected to the suction reed valve on the side opposite to the cylinder. It consists of a valve plate provided with a through hole that opens at the position of the reed valve and the other end opens at the position of the discharge reed valve.

Operation The present invention improves the filling efficiency of suction gas by forcibly opening the suction IJ-de valve by the pressure of high-pressure gas through the through hole of the valve plate.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.

21 is a compressor unit consisting of a motor 23 and a compression mechanism 24. Reference numeral 25 denotes a cylinder constituting the compression mechanism 24, and includes a piston 26 that is reciprocated by the motor 23, a suction reed valve 27, a discharge reed valve 28, and a valve plate 29. 32 is a stopper for regulating the movement of the discharge reed valve 28, 33 is a spring for fixing the stopper 32, and 34 and 35 are keepers and pins. 36 is a through hole provided in the valve plate 29, one end of which opens opposite the suction reed valve 27;
The other end is open facing the discharge reed valve 28. 43
37 and 40 are the valve plate 29 and the suction through hole of the suction reed valve 27; 38 and 41 are the discharge through holes;
Similarly, 9.42 is a through hole for fixing the valve plate 29 and the suction reed valve 27.

To explain the operation in the above configuration, the gas compressed by the piston 26 is passed through the discharge reed valve 28 to the discharge chamber 37.
Spit out and pick up. At this time, since the discharge lead 28 is open, the through hole 36 communicates with the discharge chamber 37, so that the pressure is the same. Next, when entering the suction stroke, the discharge lead box 28 closes,
When the internal pressure of the cylinder 25 becomes lower than the pressure inside the through hole 36, the valve part 43 of the suction reed valve 27 becomes a half-open state due to the pressure of the gas accumulated inside the through hole 36, and as soon as the internal pressure of the cylinder 26 becomes lower than the external pressure, suction is started. The valve portion 43 of the reed valve 27 opens and suction begins.

Therefore, a force is generated to push open the suction reed valve 27, which was insufficient in the conventional lift process alone, and the effect of improving the filling efficiency of suction gas cannot be obtained.

Effects of the Invention As described above, the present invention uses a valve plate 1 having a through hole with one end opening at the suction reed valve position and the other end opening at the discharge reed valve position. The suction reed valve is forcibly opened by the pressure of high-pressure gas, which has the effect of improving gas filling efficiency during suction.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of a compressor according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of section A in FIG. 4 is a cross-sectional view taken along the line IV--■ in FIG. 3, FIG. 5 is a vertical cross-sectional view of essential parts of a conventional compressor, and FIG. 6 is an exploded perspective view of section B in FIG. 25...Cylinder, 26...Piston, 27...Suction reed valve, 28...Discharge reed valve, 36...Through hole, 29...・・・・・・
valve plate. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 25 Schilling 26 Pi 21 No 27 19 people Riet°Fune 2/1 -υUeda Riet valve Fig. 3 3b iikL

Claims (1)

[Claims] A cylinder that forms a compression chamber, a piston that reciprocates within this cylinder, a valve plate provided on the front surface of the cylinder, a suction reed valve provided on the cylinder side of this valve plate, and also provided on the opposite side of the cylinder. and a discharge reed valve, the valve plate having a
A reciprocating compressor provided with a through hole that opens at one end at the position of the suction reed valve and at the other end at the position of the discharge reed valve.