JPS6145078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved structure of a valve device for a hermetic electric compressor. In conventional hermetic electric compressors, in which a valve structure in which a valve and a valve stop are integrally attached is inserted into a valve chamber provided in a cylinder to form a valve device, the valve is attached to the valve seat surface. To ensure correct positioning, the valve stop has a strong spring force, and when the valve structure is inserted into the valve chamber, the strong friction between the valve and the valve seat surface causes scratches on the valve seat surface. Otherwise, the valve may be deformed due to unfavorable contact between the end face of the valve chamber and the valve, which may significantly deteriorate the airtightness of the valve.

The present invention seeks to remedy these drawbacks.

The present invention will be explained below with reference to the drawings showing one embodiment thereof. Reference numeral 1 denotes a closed container having a cylinder 2 therein, a shaft 3 eccentrically provided in the cylinder 2 and directly connected to an electric motor (not shown), and a piston 4 integrally attached to the shaft 3. , the cylinder 2 and the piston 4 are configured to have a small gap at the part A to maintain airtightness during compression. The piston 4 is provided with a groove 6 for accommodating the blade 5,
The blade 5 is mounted slidably in the groove 6 in the radial direction. The cylinder 2 has a valve seat surface E having a discharge hole 9, and a side wall 14 facing the valve seat surface E.
A valve chamber 7 is formed having recesses 15, 15 formed between the valve seat surface E and both ends of the side wall 14, respectively. A screw hole 8 is provided in the side wall 14 opposite to the discharge hole 9, and together with a screw 12 to be described later, forms a pressing portion. Note that the screw hole 8 does not need to be coaxial with the discharge hole 9. A so-called valve structure is provided in the valve chamber 7 with a valve 11 integrally and overlappingly attached to the valve stop 10 which is made of a flat plate-like elastic body and is curved outward from the long side of the valve stop 10 formed in a substantially 6-shape. is stored. Valve stop 10 of valve structure
Both ends C and C' are formed slightly larger than the recesses 15 and 15 of the valve chamber 7, and are lightly press-fitted into the recesses 15 and 15. Further, the long side (b) of the valve stop 10 is bent approximately at the center and stands up on one side to form a lift space. At this time, the valve 11 is curved so that a slight gap is created between the valve 11 and the valve seat surface E. Since the approximate center of the short side (2) of the valve stop 10 is pressed by the screw 12 tightened in the screw hole 8, the tip is pressed, and the valve stop 10 is pushed through the vicinity of the bent part of the long side (2). The valve 11 is strongly pressurized to surely press the valve 11 against the valve seat surface E to ensure airtightness and operation of the valve 11. The cylinder 2 is also provided with an intake port 13, and the rotation of an electric motor (not shown) causes the piston 4 to rotate in the direction of the arrow, and the blades 5, 5' to slide and rotate on the inner surface of the cylinder 2. Gas is inhaled through the suction port 13, compressed, pushes the valve 11 open through the discharge hole 9, flows into the valve chamber 7, and is led to a cooling system (not shown) outside the closed container 1.
It performs a so-called compression effect.

With such a configuration, the valve chamber 7 of the valve structure
The incorporation into the valve chamber 7 is carried out between the valve seat surface E of the valve chamber 7 and the valve 1 of the valve structure.
Since the valve seat 1 can be lightly press-fitted with a small gap between the valve 11 and the valve 11, damage to the valve seat surface E and deformation of the valve 11 can be prevented, and sufficient airtightness of the valve 11 can be obtained. Further, after the valve structure is lightly pressed into the recesses 15, 15 and pushed in, the valve 11 of the valve stop 10 is
Since the valve 11 is strongly pressurized against the valve seat surface E from the opposite side through the long side B, the valve 11 is correctly and reliably pressed against the valve seat surface E, ensuring airtightness and operation of the valve 11. can be made into something.

As is clear from the above embodiments, the valve device of the compressor of the present invention has a substantially six-shape shape with its short side and long side,
a valve stop made of a flat elastic body formed such that one end of the short side is located near a bent portion of the substantially central portion of the long side; and one end of the valve stop is attached to the long side of the valve stop so as to overlap A valve structure consisting of a plate-shaped valve has a valve seat surface formed in a part of the cylinder, a side wall opposite to the valve seat surface, and a recess formed between both ends of the valve seat surface and the side wall. Lightly press fit into the valve chamber, position the valve on the valve seat surface, and position the short side on the side wall, and press approximately the center of the short side with a pressing part such as a screw provided on the side wall. By holding the valve, the valve seat surface will not be damaged or the valve will not be deformed when the valve is assembled, and the airtightness of the valve can be increased and reliable valve operation can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a compressor having a valve device showing one embodiment of the present invention, and FIG. 2 is a perspective view of the same valve device. 2... Cylinder, 7... Valve chamber, 10... Valve stop, 11... Valve, 11'... Bent part, 12...
...Screw, H...one end, B...long side, D...short side, 14...side wall, 15, 15...recess.

Claims (1)

[Claims] 1. A long side that is bent and stands up at approximately the center, and a short side that has one end opposite to the bent portion and has a length of approximately 6.
A valve structure consisting of a valve stop made of a flat elastic body forming a letter shape, and a plate-shaped valve fixed by overlapping from one end of the long side of the valve stop to the bent part is attached to the cylinder. A valve chamber having a valve seat surface partially formed, a side wall opposite to the valve seat surface, and a recess formed between both ends of the valve seat surface and the side wall, and insert both ends of the long side into the recess. The valve is placed in pressure contact with the valve seat surface, the short side is positioned on the side wall, and the approximate center of the short side is pressed with a pressing part such as a screw provided on the side wall. Retained compressor valve gear.