JPH04279782A - Scroll compressor - Google Patents

Abstract

PURPOSE:To prevent the occurrence of noise due to poor actions caused by opening/closing the valve plate of a refrigerant gas discharge port, and also due to collision between the valve plate and a regulating member in a scroll compressor. CONSTITUTION:A leaf spring 29 which energizes a valve guard 26 to its moving direction, is interposed, at least, at either space between a stop ring 28 and the valve guard 26 or a space between the valve guard 26 and the bottom surface of a hole section 23.

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 refrigerant gas such as fluorocarbon used in, for example, refrigeration equipment or air conditioners.

0002

[Prior Art] FIGS. 4 and 5 are, for example, Utility Model Application Publication No. 1-17
FIG. 9 is a sectional view showing the overall structure and main part structure of a conventional scroll compressor of this kind disclosed in Japanese Patent No. 9189. In the figure, reference numeral 1 denotes a shell having an oil reservoir 2 therein, and reference numeral 3 denotes a fixing device consisting of a base plate 5 housed within the shell 1 and having a discharge port 4, and a spiral side plate 6 protruding from the base plate 5. Scroll 7 is an oscillating scroll that is combined with fixed scroll 3 and includes a base plate 8 facing base plate 5 and a spiral side plate 9 projecting from base plate 8.

10 is a compression chamber formed between both scroll side plates 6 and 9, 11 is a discharge chamber formed between both base plates 5 and 8 and communicates with the discharge port 4, and 12 is below both scrolls 3 and 7. A frame 14 as a bearing support provided with an oil return hole 13;
15 is an electric motor provided between the frame 12 and the oil reservoir 2; 15 is an electric motor 1 having an oil supply hole 16 extending in the axial direction
The main shaft rotates by the drive of 4, 17 is a suction pipe, 18 is a suction port that sucks the refrigerant gas introduced into the shell 1 through this suction pipe 17 into the compression chamber 10, and 19 is a high pressure discharged from the discharge port 4. The discharge pipes 20 to 22 which lead out the refrigerant gas to the outside of the shell 1 are bearings as lubricated parts.

Reference numeral 23 denotes a bottomed hole portion formed on the back side of the base plate 5 of the fixed scroll 3 so as to communicate with the discharge port 4;
4 is an annular projection formed on the bottom surface of the hole 23 to surround the discharge port 4; 25 is a valve plate placed on the top surface of the annular projection 24 to close the discharge port 4; 26 is a valve plate formed inside the hole 23; The valve holder 27 is composed of a guide part 26a along the peripheral wall and a valve receiving part 26b formed opposite to the valve plate 25, and is movable up and down along the inner peripheral wall of the hole 23. A spring member 28, which is interposed between the receiving portion 26b and the valve plate 25 and serves as a pressing member that presses the valve plate 25 against the upper surface of the annular projection 24, is fitted into a groove formed in the inner circumferential wall of the hole portion 23. , a retaining ring serving as a regulating member that regulates upward movement of the valve receiver 26.

Next, the operation will be explained. First, when the main shaft 15 is rotationally driven by the electric motor 14, the swinging scroll 7 starts swinging, and the refrigerant gas introduced into the shell 1 from the suction pipe 17 is sucked as shown by the solid line arrow in FIG. After being drawn into the compression chamber 10 through the port 18 and compressed within the chamber, the high-pressure refrigerant gas passes through the discharge chamber 11 and exits the discharge port 4 by overcoming the spring pressure of the spring member 27 and pushing up the valve plate 25. The liquid is discharged from the shell 1 through 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, and furthermore, the amount of movement in the axial direction, that is, the opening dimension is also restricted by the valve receiver portion 26b. . Further, the valve receiver 26 is constantly pressed upward in the axial direction by the spring member 27, and the retaining ring 2
Its position is determined by 8.

[0006]

[Problems to be Solved by the Invention] Since the conventional scroll compressor is constructed as described above, when the spring member 27 is worn out and cannot press the valve receiver 26 toward the retaining ring 28, the valve receiver 26 As the valve plate 25 moves vertically and becomes rotatable as the valve plate 25 opens and closes, the valve receiver 26 causes frictional movement with the retaining ring 28 and the inner circumferential surface of the hole 23, causing the inside of the hole 23 to move. Abnormal wear occurs on the circumferential surface, the valve receiver 26, and the retaining ring 28, causing malfunction in the opening/closing operation of the valve plate 25, and
There is a problem in that the collision between the valve receiver 26 and the retaining ring 28 generates noise and degrades performance.

[0007] This invention was made in order to solve the above-mentioned problems, and even if the pressing member that presses the valve receiver against the regulating member wears out, malfunction of the opening/closing operation of the valve plate and the valve receiver and It is an object of the present invention to provide a scroll compressor that can improve performance by preventing noise caused by collisions between the scroll compressor and the regulating member.

[0008]

[Means for Solving the Problems] A scroll compressor according to the present invention has a valve receiver positioned in the moving direction between the regulating member and the valve receiver or between the valve receiver and the bottom surface of the hole. A biasing member is inserted.

[0009]

[Operation] The biasing member of the scroll compressor of the present invention constantly biases the valve receiver in its moving direction, so that even if the pressing member that presses the valve receiver against the regulating member wears out and loses its function, the valve The movement and rotation of the valve receiver is suppressed to prevent abnormal wear on the inner circumferential surface of the valve receiver, regulating member, and hole.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the main structure of a scroll compressor according to an embodiment of the present invention. In the figure, members having the same reference numerals as shown in FIG. 5 are the same as members in a conventional scroll compressor, and therefore their explanation will be omitted. Reference numeral 29 denotes a leaf spring as a biasing member that 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 A) and (B), it is formed into a disk shape and has a through hole 29a in the center.

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

Therefore, the valve receiver 26 does not cause any frictional movement with the retaining ring 28 or the inner circumferential surface of the hole 23, and abnormal wear occurs on the valve receiver 26, the inner circumferential surface of the hole 23, and the retaining ring 28. Therefore, there is no possibility of malfunction in the opening/closing operation of the valve plate 25 or noise caused by collision between the valve receiver 26 and the retaining ring 28.

In the above embodiment, the leaf spring 29 is used as the biasing member of the scroll compressor, and the retaining ring 28 and the valve plate 2
6, but as shown in FIG. 3, even if the leaf spring 29 is inserted between the valve receiver 26 and the bottom surface of the hole 23, the same effect as in the above embodiment can be obtained. It goes without saying that the biasing member is not limited to the leaf spring 29, and for example, a compression coil spring or the like may be used. Furthermore, the leaf spring 29 as the biasing member in each of the above embodiments is connected to the retaining ring 28 and the valve receiver 2.
6 or between the valve receiver 26 and the bottom surface of the hole 23, however, the scope of the present invention also includes a case in which the valve receiver 26 is inserted in both places.

[0014]

As described above, according to the present invention, the valve holder is biased in the moving direction between the regulating member and the valve holder, or between the valve holder and the bottom surface of the hole. Since a biasing member is inserted to press the valve receiver toward the regulating member, even if the pressing member that pushes the valve receiver toward the regulating member wears out and loses its function, malfunctions in the valve plate opening/closing operation and between the valve receiver and the regulating member will not occur. This makes it possible to provide a scroll compressor that can improve performance by preventing noise caused by collisions.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of essential parts of a scroll compressor in an embodiment of the present invention.

FIG. 2 shows an example of a biasing member constituting a main part of the scroll compressor in FIG. 1, in which (A) is a plan view and (B) is a cross-sectional view.

FIG. 3 is a cross-sectional view showing the configuration of essential parts of a scroll compressor in another embodiment of the invention.

FIG. 4 is a sectional view showing the overall configuration of a conventional scroll compressor.

FIG. 5 is a sectional view showing the configuration of main parts of the conventional scroll compressor in FIG. 4;

[Explanation of symbols]

23 Hole 24 Annular process 25 Valve plate 26 Benke 27 Spring member as a pressing member 28 Retaining ring as a regulating member 29 Leaf spring as a biasing member

Claims (1)

[Claims] 1. A bottomed hole provided in a base plate of a fixed scroll in communication with a discharge port, an annular projection formed on the bottom of the hole so as to surround the discharge port, and an upper surface of the circular projection. A valve plate is placed on the valve plate to block the discharge port, a guide part along the inner circumferential wall of the hole part, and a valve receiving part formed opposite to the valve plate, and the valve plate is movable up and down along the inner circumferential wall. a valve receiver, a pressing member interposed between the valve receiver part of the valve receiver and the valve plate to press the valve plate against the upper surface of the annular projection; a regulating member that is inserted between the regulating member and the valve holder or between the valve holder and the bottom surface of the hole and urges the valve holder in the moving direction; A scroll compressor characterized by comprising a biasing member.