JP2570504B2 - Scroll compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor for compressing a refrigerant gas such as chlorofluorocarbon used in a refrigeration system or an air conditioner.

[0002]

2. Description of the Related Art FIG. 4 and FIG.
It is sectional drawing which shows the whole structure and principal part structure of this kind of the conventional scroll compressor shown in Unexamined-Japanese-Patent No. 89, respectively. In the figure, 1 is a shell having an oil sump 2 therein, 3
Is a fixed scroll composed of a base plate 5 housed in the shell 1 and having a discharge port 4 and a spiral side plate 6 protruding from the base plate 5, and 7 is combined with the fixed scroll 3 and faces the base plate 5. This is an orbiting scroll composed of a base plate 8 and a spiral side plate 9 projecting from the base plate 8.

Reference numeral 10 denotes a compression chamber formed between the spiral side plates 6 and 9, 11 denotes a discharge chamber formed between the base plates 5 and 8 and communicates with the discharge port 4, and 12 denotes a lower part of the scrolls 3 and 7. A frame as a bearing support provided with an oil return hole 13, a motor 14 provided between the frame 12 and the oil reservoir 2, and a drive 15 for the motor 14 having an oil supply hole 16 extending in the axial direction. 17 is a suction pipe, 18 is a suction port for sucking the refrigerant gas introduced into the shell 1 by the suction pipe 17 into the compression chamber 10, and 19 is a high-pressure refrigerant gas discharged from the discharge port 4. Are discharged from the shell 1 and 20 to 22 are bearings as lubricated portions.

Reference numeral 23 denotes a bottomed hole formed on the back side of the base plate 5 of the fixed scroll 3 so as to communicate with the discharge port 4, and 24 denotes a bottom surface of the hole 23 so as to surround the discharge port 4. The formed annular projection 25 is a valve plate mounted on the upper surface of the annular projection 24 to close the discharge port 4, and 26 is formed to face the guide portion 26 a along the inner peripheral wall of the hole 23 and the valve plate 25. It consists of a valve receiving part 26b and a hole
A valve receiver that can move up and down along the inner peripheral wall of the valve holder 27 is interposed between the valve receiver 26 b of the valve receiver 26 and the valve plate 25, and presses the valve plate 25 against the upper surface of the annular projection 24. A spring member as a member,
28 is fitted into a groove formed in the inner peripheral wall of the hole 23,
This is a retaining ring as a regulating member for regulating the upward movement of 26.

Next, the operation will be described. First, the electric motor
When the main shaft 15 is driven to rotate by the rotation 14, the orbiting scroll 7 starts to oscillate, and as shown by a solid line arrow in FIG.
The refrigerant gas introduced into the shell 1 from the suction port 17 is sucked into the compression chamber 10 through the suction port 18 and compressed in the chamber. The valve plate 25 is pushed up by overcoming the spring pressure of the member 27 and is discharged and discharged out of the shell 1 via the discharge pipe 19. At this time,
The movement of the valve plate 25 and the spring member 27 is restricted only in the axial direction by the guide portion 26a of the valve receiver 26.
Accordingly, the amount of movement in the axial direction, that is, the opening size is also regulated. Further, the valve receiver 26 is constantly pressed upward in the axial direction by the spring member 27, and its position is determined by the retaining ring 28.

[0006]

Since the conventional scroll compressor is configured as described above, if the spring member 27 becomes worn and the valve bearing 26 cannot be pressed toward the retaining ring 28, the valve bearing will not be pressed.
Since the valve 26 moves up and down and is rotatable with the opening and closing of the valve plate 25, the valve catch 26 causes frictional movement with the retaining ring 28 and the inner peripheral surface of the hole 23, and the hole 23 Abnormal wear occurs on the inner peripheral surface of the valve, the valve catch 26 and the retaining ring 28, causing malfunctions in the opening and closing operation of the valve plate 25, and generating noise due to the collision between the valve bearing 26 and the retaining ring 28. There is a problem that the performance is lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. Even if a pressing member for pressing a valve receiver against a regulating member becomes worn, a malfunction in opening / closing operation of a valve plate and a problem with the valve receiver may occur. It is an object of the present invention to provide a scroll compressor capable of preventing noise caused by a collision with a regulating member and improving performance.

[0008]

A scroll compressor according to the present invention moves a valve catch in a movement direction between at least one of a position between a regulating member and a valve catch or between a valve catch and a bottom surface of a hole. This is one in which an urging member for urging is inserted.

[0009]

The urging member of the scroll compressor according to the present invention constantly urges the valve receiver in the moving direction, so that even if the pressing member for pressing the valve receiver against the regulating member wears out and loses its function, The movement and rotation of the bearing are suppressed, and abnormal wear of the valve bearing, the regulating member and the inner peripheral surface of the hole is prevented.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a cross-sectional view showing a main configuration of a scroll compressor according to an embodiment of the present invention. In the figure, the members having the same reference numerals as those shown in FIG. 5 are the same as the members in the conventional scroll compressor, and the description is omitted. Reference numeral 29 denotes a leaf spring which is inserted between the retaining ring 28 as a regulating member and the valve receiver 26 and biases the valve receiver 26 toward the base plate 5 of the fixed scroll 3 as shown in FIG. As shown in (A) and (B), it is formed in a disk shape and has a through hole 29a at the center.

Next, the operation of the main part of the scroll compressor according to one embodiment of the present invention configured as described above will be described. Similarly to the conventional one, the high-pressure refrigerant gas compressed in the compression chamber 10 is discharged from the discharge port 4 provided on the base plate 5 of the fixed scroll 3 by pushing up the valve plate 25 and the spring member 27 and discharged. It is discharged out of the shell 1 through 19.
At this time, since the valve support 26 is constantly urged to the bottom surface of the hole 23 formed in the base plate 5 of the fixed scroll 3 by the leaf spring 29, the spring member 27 is worn by the opening and closing movement of the valve plate 25. ,
Even if the function of pressing the valve catch 26 toward the retaining ring 28 is lost, it cannot move up and down or rotate.

Accordingly, the valve receiver 26 does not cause frictional movement between the retaining ring 28 and the inner peripheral surface of the hole 23, and the valve receiver 26,
Abnormal wear does not occur on the inner peripheral surface of the hole 23 and the retaining ring 28, so that the opening / closing operation of the valve plate 25 may malfunction or noise may occur due to the collision between the valve receiver 26 and the retaining ring 28. No more.

In the above-described embodiment, the biasing member of the scroll compressor in which the leaf spring 29 is interposed between the retaining ring 28 and the valve plate 26 has been described, but as shown in FIG. Even if the leaf spring 29 is interposed between the valve catch 26 and the bottom surface of the hole 23, the same effect as in the above-described embodiment can be obtained.
The biasing member is not limited to the leaf spring 29,
For example, it goes without saying that a compression coil spring or the like may be applied. Further, the leaf spring 29 as the urging member in each of the above embodiments is provided between the retaining ring 28 and the valve receiver 26 or the valve receiver 26.
Although it is interposed in either one between 26 and the bottom surface of the hole 23, the one interposed in both is also included in the scope of the present invention.

[0014]

As described above, according to the present invention, the valve catch is urged in the moving direction between at least one of between the regulating member and the valve catch or between the valve catch and the bottom surface of the hole. Even if the pressing member that presses the valve receiver toward the regulating member wears out and loses its function, malfunction occurs in the opening and closing operation of the valve plate and between the valve receiving member and the regulating member. Thus, it is possible to provide a scroll compressor capable of preventing noise caused by a collision and improving performance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main configuration of a scroll compressor according to an embodiment of the present invention.

FIGS. 2A and 2B show an example of an urging member constituting a main part of the scroll compressor in FIG. 1, wherein FIG. 2A is a plan view and FIG. 2B is a sectional view.

FIG. 3 is a cross-sectional view showing a main configuration of a scroll compressor according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the entire configuration of a conventional scroll compressor.

FIG. 5 is a cross-sectional view showing a main part configuration of the conventional scroll compressor in FIG.

[Explanation of symbols]

 23 Hole 24 Annular protrusion 25 Valve plate 26 Valve catch 27 Spring member as pressing member 28 Retaining ring as regulating member 29 Leaf spring as urging member

Claims (1)

(57) [Claims] 1. A bottomed hole provided in a base plate of a fixed scroll in communication with a discharge port, a valve plate mounted in the hole to close the discharge port, and a guide section along an inner peripheral wall of the hole. And a valve receiver formed opposite to the valve plate, the valve receiver being movable up and down along the inner peripheral wall, and the valve interposed between the valve receiver of the valve receiver and the valve plate. A pressing member for pressing a plate toward the discharge port side, a regulating member provided above the hole to regulate the upward movement of the valve catch, between the regulating member and the valve catch or between the valve catch and the valve catch; The valve receiver is inserted between at least one of the bottom of the hole and the valve receiver to urge the valve receiver in the vertical movement direction, so that the valve receiver is located between the regulating member and the bottom of the hole.
A scroll compressor comprising an urging member for holding a vertical movably .