CN111720324B

CN111720324B - Compression mechanism, rotary compressor and refrigerating device

Info

Publication number: CN111720324B
Application number: CN202010606585.7A
Authority: CN
Inventors: 谭琴; 罗承卓; 江波
Original assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Current assignee: Anhui Meizhi Precision Manufacturing Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-04-15
Anticipated expiration: 2040-06-29
Also published as: CN111720324A

Abstract

The invention discloses a compression mechanism, a rotary compressor and a refrigerating device. The compression mechanism includes: the air cylinder is internally provided with a cylinder chamber and a slide sheet groove; an exhaust port in communication with the cylinder chamber; a piston; a crankshaft for driving the piston to eccentrically rotate within the cylinder chamber; an upper bearing and a lower bearing that rotatably support the crankshaft; the sliding sheet is arranged in the sliding sheet groove and can move back and forth between an inner limit position and an outer limit position, and the inner end of the sliding sheet is abutted against the piston; the exhaust valve plate is used for opening and closing the exhaust hole; and the transmission component drives the exhaust valve plate to close the exhaust hole when the slide sheet moves outwards. According to the compression mechanism, the exhaust valve plate is good in applicability and reliability, low in noise and high in energy efficiency.

Description

Compression mechanism, rotary compressor and refrigerating device

Technical Field

The invention relates to the technical field of compressors, in particular to a compression mechanism, a rotary compressor with the compression mechanism and a refrigerating device with the compression mechanism.

Background

The exhaust valve plate is an important part of the rotary compressor, and influences the energy efficiency, power consumption, noise and the like of the compressor. Various improvements to the structure and material of the exhaust valve sheet itself have been proposed in the related art, but these improvements have respective problems, and thus there is a need for improvement.

In the related art, the discharge valve plate of the rotary compressor is generally a reed valve plate having a certain elasticity, i.e., a certain rigidity, and one end of the discharge valve plate is fixed and the other end is free to open and close the discharge hole.

The inventor finds and realizes through research that the greater the rigidity of the exhaust valve plate, the better the closure timeliness of the exhaust valve, and the higher the reliability, the lower the noise impacting the valve seat. However, the larger the rigidity of the exhaust valve plate is, the slower the opening is, the smaller the opening amplitude is, the smaller the exhaust flow area is, the larger the exhaust resistance loss is, the larger the power consumption of the compressor is, and thus the rigidity design of the exhaust valve plate is difficult, the design flexibility is limited, and the applicability and reliability of the exhaust valve plate are poor.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

in the related art, the rigidity of the exhaust valve plate is usually designed according to the gas thrust force applied to the exhaust valve plate, but the exhaust valve plate designed in the way cannot adapt to different compressors and different working conditions of the compressors. For example, for a variable frequency compressor, the rotating speed of the variable frequency compressor is variable, when the compressor runs at a high speed, more gas is discharged in unit time, the acting force of the gas on the exhaust valve plate is larger, and in order to ensure that the exhaust valve plate is closed in time, avoid backflow to influence energy efficiency and reduce noise, the exhaust valve plate needs to be designed to have larger rigidity; when the compressor runs at a low speed, the gas acting force on the exhaust valve plate is small, the exhaust valve plate with high rigidity cannot ensure the full opening of the exhaust valve plate, so that the flutter is easy to occur, the exhaust resistance loss is large, and the noise problem caused by the airflow pulsation is easy to cause. Therefore, when the compressor is operated at a variable speed, the discharge valve sheet is generally designed to have a large rigidity in order to ensure reliability of the discharge valve sheet, but this inevitably results in an influence on the energy efficiency of the compressor at a low speed. In order to improve the energy efficiency of the compressor, if the discharge valve plate is designed to have a low rigidity, the problems of reduced closing timeliness and reliability of the compressor at high rotation speed and high noise are caused.

Therefore, the inventor has realized that the difficulty in designing the rigidity of the exhaust valve sheet cannot be solved only by improving the structure and material of the exhaust valve sheet itself, resulting in the problem of poor design flexibility, applicability, and reliability of the exhaust valve sheet.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides a compression mechanism, and the exhaust valve plate of the compression mechanism is good in closing timeliness, applicability and reliability, low in noise and high in energy efficiency.

The embodiment of the invention also provides a rotary compressor comprising the compression mechanism.

The embodiment of the invention also provides a refrigerating device comprising the compressor.

The compression mechanism comprises a cylinder, wherein a cylinder chamber and a slide sheet groove are arranged in the cylinder;

an exhaust port in communication with the cylinder chamber; a piston; a crankshaft for driving the piston to eccentrically rotate within the cylinder chamber; an upper bearing and a lower bearing that rotatably support the crankshaft; the sliding sheet is arranged in the sliding sheet groove and can move back and forth between an inner limit position and an outer limit position, and the inner end of the sliding sheet is abutted against the piston; the exhaust valve plate is used for opening and closing the exhaust hole; and the transmission component drives the exhaust valve plate to close the exhaust hole when the slide sheet moves outwards.

According to the compression mechanism provided by the embodiment of the invention, when the slide sheet moves from the inner limit position to the outer limit position, namely the slide sheet moves along the center far away from the cylinder chamber, the transmission part applies closing force for closing the exhaust hole to the exhaust valve sheet, namely the exhaust valve sheet is driven to close the exhaust hole, and the exhaust valve sheet drives the exhaust hole to be closed by virtue of the driving force of the transmission part, so that the closing timeliness and reliability of the exhaust valve sheet can be improved, the rigidity of the exhaust valve sheet can be designed to be non-rigidity, the exhaust valve sheet is easy to open, the exhaust resistance loss is reduced, the design flexibility and applicability of the exhaust valve sheet are improved, the exhaust noise is reduced, and the energy efficiency is high.

In some embodiments, the transmission member contacts the vent valve plate when the slide is at the inner limit position or contacts the vent valve plate after the slide moves outward from the inner limit position by a predetermined distance to drive the vent valve plate to close the vent hole.

In some embodiments, the upper bearing is disposed above the cylinder to close an upper end of the cylinder chamber, the lower bearing is disposed below the cylinder to close a lower end of the cylinder chamber, and the exhaust hole is formed on at least one of the upper bearing and the lower bearing.

In some embodiments, the exhaust hole is formed on the upper bearing, and the exhaust valve plate is a reed valve plate and has a fixed end fixed on the upper bearing and a free end for opening and closing the exhaust hole.

In some embodiments, a receiving groove is formed on the upper surface of the upper bearing, and the discharge valve plate is installed in the receiving groove.

In some embodiments, the free end of the exhaust valve plate has a windward area, the windward area is a projection area of the exhaust hole on the exhaust valve plate when the exhaust valve plate closes the exhaust hole, and a contact position of the transmission member and the exhaust valve plate is located in the windward area.

In some embodiments, the exhaust hole is a plurality of exhaust holes, and the transmission component is arranged corresponding to at least one exhaust hole.

In some embodiments, the exhaust valve further comprises a lift limiter, wherein the lift limiter is used for limiting the lift of the exhaust valve plate and is provided with an avoiding hole used for avoiding the transmission component.

In some embodiments, the transmission component is a swing rod, and the swing rod is driven to swing around a pivot when the slide sheet moves outwards, so that the swing rod drives the exhaust valve sheet to close the exhaust hole.

In some embodiments, the swing rod includes a rod body, a sliding piece contact portion, and a valve plate contact portion, and when the sliding piece moves outward, the rod body is driven to swing by pushing the sliding piece contact portion, so that the valve plate contact portion drives the exhaust valve plate to close the exhaust hole.

In some embodiments, the slide contact portion is formed by a first end of the rod, and the valve plate contact portion is disposed at a second end of the rod and extends from the rod toward one side of the exhaust hole.

In some embodiments, the transmission component includes a main translational part and an auxiliary translational part, the slide plate drives the main translational part to translate when moving outwards, and the main translational part drives the auxiliary translational part to translate so that the auxiliary translational part drives the exhaust valve plate to close the exhaust hole.

In some embodiments, the primary translational member is provided with a guide surface for driving the secondary translational member, and the guide surface is a slope or an arc surface.

In some embodiments, the primary translational member is coupled to an outer end face of the slide.

In some embodiments, the secondary translational member contacts the guide surface when the slide is in the inner limit position or after moving outwardly from the inner limit position by a predetermined distance.

A compression mechanism according to another embodiment of the present invention includes: the air cylinder is internally provided with a cylinder chamber and a slide sheet groove; a piston; a crankshaft for driving the piston to eccentrically rotate within the cylinder chamber; an upper bearing and a lower bearing that rotatably support the crankshaft; the sliding sheet is arranged in the sliding sheet groove and can move back and forth between an inner limit position and an outer limit position, and the inner end of the sliding sheet is abutted against the piston; an exhaust hole formed on at least one of the upper bearing and the lower bearing, the exhaust hole communicating with the cylinder chamber; the exhaust valve plate is used for opening and closing the exhaust hole; and the swing rod drives the swing rod to swing around the pivot when the sliding sheet moves outwards so as to enable the swing rod to push the exhaust valve sheet to close the exhaust hole.

A compression mechanism according to still another embodiment of the present invention includes: the air cylinder is internally provided with a cylinder chamber and a slide sheet groove; a piston; a crankshaft for driving the piston to eccentrically rotate within the cylinder chamber; an upper bearing and a lower bearing that rotatably support the crankshaft; the sliding sheet is arranged in the sliding sheet groove and can move back and forth between an inner limit position and an outer limit position, and the inner end of the sliding sheet is abutted against the piston; an exhaust hole formed on at least one of the upper bearing and the lower bearing, the exhaust hole communicating with the cylinder chamber; the exhaust valve plate is used for opening and closing the exhaust hole; the sliding sheet drives the main translation piece to translate outwards when moving outwards, and the main translation piece drives the auxiliary translation piece to translate downwards so as to drive the exhaust valve plate to close the exhaust hole.

The rotary compressor according to the embodiment of the present invention includes the compression mechanism of the above-described embodiment.

In some embodiments, the rotary compressor is a multi-cylinder compressor.

In some embodiments, the maximum operating speed of the rotary compressor is greater than 150 revolutions per second and less than 240 revolutions per second.

In some embodiments, the rotary compressor is a fixed speed compressor or a variable speed compressor.

The refrigeration device according to the embodiment of the invention comprises the rotary compressor of the above embodiment.

Drawings

Fig. 1 is a sectional view of a compressor according to an embodiment of the present invention.

Fig. 2 is an exploded view of a compression mechanism according to an embodiment of the present invention.

Fig. 3 is a plan view of a compression mechanism according to an embodiment of the present invention.

Fig. 4 is a sectional view taken along B-B in fig. 3.

Fig. 5 is a sectional view taken along C-C in fig. 3.

Fig. 6 is a schematic structural view of a transmission member according to an embodiment of the present invention.

Fig. 7A is a sectional view of a lift stopper of a compression mechanism according to an embodiment of the present invention.

FIG. 7B is a plan view of a lift stop of a compression mechanism according to an embodiment of the present invention.

FIG. 8 is a schematic view of a discharge valve plate of a compression mechanism according to an embodiment of the present invention.

Fig. 9 is a state diagram in which the transmission member of the compression mechanism does not contact the discharge valve sheet according to the embodiment of the present invention.

Fig. 10 is a view showing a state where a transmission member of the compression mechanism contacts the discharge valve sheet according to the embodiment of the present invention.

Fig. 11 is a schematic diagram of the compression mechanism according to the embodiment of the present invention, in which the crank angle is 0 ° or 360 °.

Fig. 12 is a schematic view of a compression mechanism according to an embodiment of the present invention having a crank angle of 180 °.

Fig. 13 is an exploded view of a compression mechanism according to another embodiment of the present invention.

Fig. 14 is a schematic top view of a compression mechanism according to another embodiment of the invention.

Fig. 15 is a sectional view taken along D-D in fig. 14.

Fig. 16 is a view showing a state in which a discharge valve sheet is not driven to close a discharge hole by a transmission member of a compression mechanism according to another embodiment of the present invention.

Fig. 17 is a view showing a state in which a discharge valve sheet is driven to close a discharge hole by a driving part of a compression mechanism according to another embodiment of the present invention.

Fig. 18 is a schematic cross-sectional view of the primary translation of the transmission component of the compression mechanism according to another embodiment of the present invention.

Reference numerals:

100. a housing;

200. a motor;

300. a compression mechanism;

1. a cylinder; 101. a cylinder chamber; 102. a slide groove;

2. an exhaust hole;

3. a piston;

4. a crankshaft; 401. an eccentric portion;

5. an upper bearing; 501. accommodating grooves;

6. a lower bearing;

7. sliding blades;

8. an exhaust valve plate; 801. a fixed end; 802. a free end; 803. a fixing hole; 804. a windward region;

9. a lift limiter; 901. avoiding holes; 902. a limiting surface; 903. mounting holes;

10. a swing rod; 1001. a rod body; 1002. a slider contact portion; 1003. a valve sheet contact portion; 1004. a pivot hole;

11. a pivot;

12. a translation component; 1201. a primary translational member; 12011. a first vertical section; 12012. a first horizontal segment 12013, a second vertical segment; 12014. a second horizontal segment; 12015. an inclined section; 12016. a guide surface; 1202. and an auxiliary translation member.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A compression mechanism 300 and a rotary compressor according to an embodiment of the present invention will be described with reference to fig. 1 to 18.

As shown in fig. 1, the rotary compressor according to the embodiment of the present invention includes a casing 100, a motor 200 and a compression mechanism 300, the motor 200 and the compression mechanism 300 being installed in the casing 100, the motor 200 being used to drive the compression mechanism 300.

A compression mechanism 300 of a rotary compressor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 18, a compression mechanism 300 according to an embodiment of the present invention includes a cylinder 1, an exhaust hole 2, a piston 3, a crankshaft 4, an upper bearing 5, a lower bearing 6, a vane 7, an exhaust valve plate 8, and a transmission member.

The cylinder 1 has a cylinder chamber 101 and a vane groove 102 therein. The exhaust hole 2 communicates with the cylinder chamber 101, an eccentric portion 401 is provided at one end of the crankshaft 4, and the piston 3 is attached to the eccentric portion 401. The crankshaft 4 is rotatably supported by an upper bearing 5 and a lower bearing 6, and the crankshaft 4 drives the piston 3 to eccentrically rotate in the cylinder chamber 101, thereby performing compression. The slide plate 7 is movable in a reciprocating manner in the slide plate groove 102, the inner end of the slide plate 7 abuts against the piston 3, the slide plate 7 partitions the cylinder chamber 101 into an intake chamber and an exhaust chamber as the piston 3 eccentrically rotates in the cylinder chamber 101, and the exhaust hole 2 communicates with the exhaust chamber. The vane 7 has an inner limit position and an outer limit position in the vane groove 102, and the vane 7 reciprocates between the inner limit position and the outer limit position in the vane groove 102 as the piston 3 eccentrically rotates in the cylinder chamber 101.

In the embodiment of the present invention, for convenience of description, the term "inner" refers to a direction toward the center of the cylinder chamber 101 in the radial direction of the cylinder chamber 101, and "outer" refers to a direction away from the center of the cylinder chamber 101 in the radial direction of the cylinder chamber 101.

Correspondingly, the end of the sliding sheet 7 close to the piston 3 is the inner end of the sliding sheet 7, the end of the sliding sheet 7 far away from the piston 3 is the outer end of the sliding sheet 7, and the sliding sheet 7 moves outwards, namely the sliding sheet 7 moves from the inner limit position to the outer limit position. For example, in fig. 4, the inward movement of the slider 7 is the leftward movement of the slider 7, and the outward movement of the slider 7 is the rightward movement of the slider 7.

The inner limit position is a position of the vane 7 when the inner end of the vane 7 is closest to the center of the cylinder chamber 101, that is, a position of the vane 7 when the crank angle is 180 degrees, as shown in fig. 12. The outer limit position is a position of the vane 7 when the inner end of the vane 7 is farthest from the center of the cylinder chamber 101, that is, a position of the vane 7 when the crank angle is 0 or 360 degrees, which is a rotation angle of the compressor, as shown in fig. 11.

The discharge valve sheet 8 is used to open and close the discharge hole 2. The transmission component is used for driving the exhaust valve plate 8 to close the exhaust hole 2 when the sliding sheet 7 moves outwards. In other words, the transmission member is linked with the sliding piece 7, and when the sliding piece 7 moves from the inner limit position to the outer limit position, the transmission member drives the exhaust valve piece 8 to close the exhaust hole 2.

As shown in fig. 1 to 5, when the compression mechanism 300 operates, the piston 3 eccentrically rotates in the cylinder chamber 101, the gas in the cylinder chamber 101 is compressed into high-pressure gas, when the pressure reaches a certain value, the gas pushes the exhaust valve plate 8 open and is exhausted from the exhaust hole 2, the piston 3 pushes the slide plate 7 to move from the inner limit position to the outer limit position, and the transmission part applies a closing force for closing the exhaust hole 2 to the exhaust valve plate 8 to drive the exhaust valve plate 8 to close the exhaust hole 2. Because the exhaust valve plate 8 is pushed by the transmission part to close the exhaust hole 2, the timeliness and the reliability are improved when the exhaust valve plate 8 is closed. Moreover, due to the assistance of the transmission part, the rigidity design of the exhaust valve plate 8 is flexible, and the exhaust valve plate 8 can be designed to be non-rigid (namely the exhaust valve plate 8 is not fixed), so that the exhaust valve plate 8 is easy to open, the opening degree is large, the exhaust resistance is reduced, the exhaust noise is reduced, and high energy efficiency can be ensured at both high speed and low speed.

In the embodiment of the present invention, the transmission member drives the discharge valve plate 8 to close the discharge hole 2 when the sliding plate 7 moves outward, which should be broadly understood as follows.

In some embodiments, the transmission part contacts the discharge valve plate 8 to drive the discharge valve plate 8 to close the discharge hole 2 after the sliding plate 7 moves outwards from the inner limit position by a predetermined distance. In other words, before the sliding piece 7 moves from the inner limit position to the outer limit position by the predetermined distance, the transmission part moves towards the exhaust valve sheet 8, but does not contact with the exhaust valve sheet 8, and does not drive the exhaust valve sheet 8, and after the sliding piece 7 moves by the predetermined distance, the transmission part contacts with the exhaust valve sheet 8 and drives the exhaust valve sheet 8 to move towards the exhaust hole 2 to close the exhaust hole 2.

In other embodiments, the transmission member is in contact with the discharge valve plate 8 when the slide 7 is in the inner limit position. In other words, when the sliding vane 7 is at the inner limit position, the transmission part is in contact with the exhaust valve sheet 8, and in the process that the sliding vane 7 moves from the inner limit position to the outer limit position, the transmission part drives the exhaust valve sheet 8 to move towards the exhaust hole 2 so as to gradually close the exhaust hole 2. Because when the gleitbretter 7 outwards moved, transmission unit contacts with discharge valve piece 8 all the time, can slow down the instantaneous speed that discharge valve piece 8 closed exhaust hole 2, reduces the noise that the discharge valve piece 8 struck the disk seat and produced when closing exhaust hole 2.

In some embodiments, the upper bearing 5 is located at an upper end provided above the cylinder 1 to close the cylinder chamber 101, the lower bearing 6 is located at a lower end provided below the cylinder 1 to close the cylinder chamber 101, and the exhaust hole 2 is formed on at least one of the upper bearing 5 and the lower bearing 6. As shown in fig. 2 and 4 to 5, the discharge hole 2 is formed on the upper bearing 5, i.e., the discharge hole 2 penetrates the upper bearing 5 and communicates with the cylinder chamber 101. It is understood that the exhaust holes 2 may be formed on the lower bearing 6, or both the upper bearing 5 and the lower bearing 6. It will be appreciated that the discharge holes 2 may be formed at other positions, for example, in the embodiment of the multi-cylinder compressor, the discharge holes 2 may be formed on the partition plate between the adjacent cylinders 1.

As shown in fig. 2 and 3, in some embodiments of the present invention, the discharge valve sheet 8 is a reed valve sheet, and the discharge air has a fixed end 801 fixed to the upper bearing 5 and a free end 802 for opening and closing the discharge air hole 2. The fixed end 801 of the discharge valve plate 8 is provided with a fixing hole 803, and the fixed end 801 of the discharge valve plate 8 is fixed to the upper bearing 5 by, for example, a bolt, welding, riveting, or other fixing means. Because the exhaust valve plate 8 closes the exhaust hole 2 through the elasticity of the exhaust valve plate 8 and the driving of the transmission part, the rigidity of the exhaust valve plate 8 can be non-rigidity. It should be understood that the present invention is not limited thereto, for example, the exhaust valve plate 8 may be unfixed, opened by gas thrust, and closed by the driving of the transmission member, in which case the exhaust valve plate 8 may also be referred to as a non-rigid exhaust valve plate 8.

In some embodiments, as shown in fig. 2 and 3, a receiving groove 501 is formed on the upper surface of the upper bearing 5, and the air release valve sheet 8 is installed in the receiving groove 501. The fixed end 801 of the reed valve plate is fixed at the bottom of the receiving groove 501, the free end 802 of the exhaust hole 2 covers the exhaust hole 2, and when exhausting, the free end 802 of the reed valve plate bends under the action of gas thrust to open the exhaust hole 2.

In some embodiments, as shown in fig. 8, when the exhaust valve plate 8 closes the exhaust hole 2, a projection area of the exhaust hole 2 on the exhaust valve plate 8 is set as a windward area 804 of the exhaust valve plate 8, and a contact position of the transmission part when contacting the exhaust valve plate 8 is located in the windward area 804. Preferably, the diameter of the windward region 804 is equal to the diameter of the exhaust vent 2. The contact position of the transmission part and the exhaust valve block 8 is located in the windward area 804, when the transmission part presses the exhaust valve block 8 to close the exhaust hole 2, the exhaust hole 2 is closed stably, the exhaust valve block 8 is not easy to rebound or warp when the exhaust hole 2 is closed, and the closeness of the exhaust hole 2 is improved.

The exhaust holes 2 can be one or more, the transmission part is arranged corresponding to at least one exhaust hole 2, namely, the exhaust valve plate 8 for opening and closing at least one exhaust hole 2 is driven by the transmission part. Preferably, the transmission parts are provided in one-to-one correspondence with the exhaust holes 2.

As shown in fig. 2, 4-5 and 7, in some embodiments, the compression mechanism 300 further includes a lift stopper 9, the lift stopper 9 is used for limiting the lift of the exhaust valve plate 8, that is, limiting the formation of the free end 802 of the exhaust valve plate 8, the lift stopper 9 is provided with an avoiding hole 901 for avoiding a transmission component, and the transmission component can pass through the avoiding hole 901 and contact with the free end 802 of the exhaust valve plate 8 to drive the exhaust valve plate 8. It is understood that the relief hole 901 may be a circumferentially open hole, as shown in fig. 7, or a closed hole, as shown in fig. 13. The specific form of the avoiding hole 901 may be designed according to the specific form of the transmission component, so as to avoid interference with the transmission component.

In some embodiments, as shown in fig. 9 and 10, the transmission member is a swinging member, in particular, the transmission member is a swinging rod 10, and the swinging rod 10 is swingable about a pivot 11 mounted on the upper bearing 5. When the slide sheet 7 moves outwards, the swing rod 10 is driven to swing around the pivot 11, for example, in fig. 9 and 10, the swing rod 10 swings anticlockwise, so as to drive the exhaust valve sheet 8 to close the exhaust hole 2 downwards.

As shown in fig. 2, fig. 4-6 and fig. 9-10, the swing link 10 includes a lever 1001, a slide contact 1002 and a valve plate contact 1003. The pivot 11 is pivotally supported at the middle of the lever 1001, and the vane contact portion 1002 and the valve sheet contact portion 1003 are respectively located at both ends of the lever 1001. For example, the valve plate contact portion 1003 is disposed at a first end (left end in fig. 6) of the rod 1001, that is, one end of the rod 1001 close to the exhaust valve plate 8 when the exhaust valve plate 8 is closed, and the slide plate contact portion 1002 is disposed at a second end (right end in fig. 6) of the rod 1001, that is, one end of the rod 1001 close to the outer end of the slide plate 7 when the exhaust valve plate 8 is closed. When the sliding sheet 7 moves outward, the outer end of the sliding sheet 7 drives the sliding sheet contact portion 1002, so that the rod 1001 swings counterclockwise around the pivot 11, the valve sheet contact portion 1003 moves toward the exhaust hole 2, and the exhaust valve sheet 8 is pushed to close the exhaust hole 2.

As described above, the valve sheet contact part 1003 may contact the exhaust valve sheet 8 after the sliding sheet 7 moves backward from the inner limit position by a predetermined distance, that is, after the rod 1001 swings counterclockwise by a predetermined angle, the valve sheet contact part 1003 contacts the exhaust valve sheet 8, and as the sliding sheet 7 continues to move outward, the rod 1001 continues to swing counterclockwise, and the valve sheet contact part 1003 drives the exhaust valve sheet 8 to move downward to close the exhaust hole 2. Alternatively, when the slide plate 7 is at the inner limit position, the valve plate contact portion 1003 is in contact with the vent valve plate 8, and when the slide plate 7 moves outward from the inner limit position, the valve plate contact portion 1003 pushes the vent valve plate 8 to gradually move downward to gradually close the vent hole 2.

In some embodiments, as shown in fig. 6 and 9 to 10, the valve sheet contact part 1003 extends from the rod 1001 toward a side of the discharge hole 2. Preferably, the valve sheet contact 1003 is perpendicular to the lever 1001, the vane contact 1002 and the valve sheet contact 1003 are integrated with the lever 1001, and the valve sheet contact 1003 may be fixed to the lever 1001 by welding, screwing, or the like. In the embodiment shown in FIGS. 9 and 10, slider contact 1002 is formed by the second end of rod 1001 or a portion thereof.

In some embodiments, the slider contact 1002 is in constant contact with the slider 7, e.g., the outer end of the slider 7. In other words, when the slide 7 reciprocates between the inner limit position and the outer limit position, the slide contact portion 1002 is always in contact with and does not separate from the outer end of the slide 7. In some specific examples, the sliding piece contact portion 1002 can be always abutted to the outer end of the sliding piece 7 by an elastic member, for example, a compression spring or a leaf spring is disposed between the swing rod 10 and the upper bearing 5, or a torsion spring is disposed on the pivot 11, so that the sliding piece 7 is prevented from being collided with the sliding piece contact portion 1002 during movement, noise generated during operation of the compression mechanism 300 is reduced, and the service life of the transmission component and the swing rod 10 is prolonged.

In some embodiments, as shown in fig. 7A and 7B, the lift limiter 9 is disposed above the exhaust valve sheet 8. When the valve sheet contact portion 1003 moves downward, the valve sheet contact portion 1003 passes through the avoiding hole 901 to contact the exhaust valve sheet 8, so that the swing link 10 does not interfere with the lift stopper 9, and in this embodiment, the avoiding hole 901 is a hole with a circumferential opening.

In some embodiments, as shown in FIGS. 3 to 5, it is preferable that, in order to make the swing link 10 move smoothly, the degrees of freedom of the swing link 10 in other directions are restricted except for the degree of freedom of swing, and the restriction gap is ≦ 0.05 mm. For example, to limit the displacement of the rocker 10 in the axial direction of the pivot 11, the rocker 10 is supported by the pivot 11 to swing in a groove formed in the upper bearing 5, the groove width is b, and the transmission member width b1 satisfies the relation: b-b1 is more than 0 and less than or equal to 0.05 mm. To limit the displacement of the rocker 10 in the radial direction of the pivot 11, the diameter d2 of the pivot 11 hole 1004 on the upper bearing 5, the diameter d1 of the pivot 11 hole 1004 of the transmission component and the diameter d of the pivot 11 satisfy the following relation: d1-d is less than or equal to 0.05 mm and d2-d is less than or equal to 0.05 mm, so that the running stability of the compression mechanism 300 is improved.

In other embodiments, as shown in fig. 13 to 17, the transmission member is a translation member 12. The transmission component comprises a main translational member 1201 and an auxiliary translational member 1202, when the slide sheet 7 moves outwards, the main translational member 1201 is driven to translate, for example, to translate leftwards in fig. 15-17, and the main translational member 1201 drives the auxiliary translational member 1202 to translate, for example, to translate downwards in fig. 15-17, so as to drive the exhaust valve sheet 8 to close the exhaust hole 2.

Specifically, as shown in fig. 18, the main translational member 1201 includes a first vertical segment 12011, a first horizontal segment 12012, a second vertical segment 12013, a second horizontal segment 12014, and an inclined segment 12015, wherein an upper end of the first vertical segment 12011 is connected to a right end of the first horizontal segment 12012, and preferably has an arc transition, a lower end of the second vertical segment 12013 is connected to a left end of the first horizontal segment 12012, a right end of the second horizontal segment 12014 is connected to an upper end of the second vertical segment 12013, and the inclined segment 12015 is connected to a left end of the second horizontal segment 12014, it should be understood that the inclined segment 12015 may be inclined or curved. The lower surface of the inclined section 12015 forms a guide surface 12016, and the guide surface 12016 may be a slope or a curved surface. The end of the primary translational member 1201 remote from the secondary translational member 1202 is connected to the outer end face of the sliding piece 7, and as shown in fig. 15-17, the first vertical section 12011 is connected to the outer end face of the sliding piece 7. In some embodiments, secondary translational member 1202 is cylindrical and has a hemispherical upper end.

When the sliding sheet 7 moves outwards, the main translational member 1201 is driven to translate outwards (rightwards in fig. 15-17), and the guide surface 12016 of the main translational member 1201 is in contact with the secondary translational member 1202 to drive the secondary translational member 1202 to move downwards, so that the exhaust valve sheet 8 is driven to close the exhaust hole 2. When the sliding sheet 7 moves outwards, the outer end of the sliding sheet 7 pushes the main translational member 1201 to translate rightwards, and under the guiding action of the guide surface 12016 of the main translational member 1201, the main translational member 1201 pushes the auxiliary translational member 1202 to move towards the exhaust hole 2 (downwards in fig. 15-17), so that the exhaust valve sheet 8 is driven to close the exhaust hole 2.

In some embodiments, the main translational member 1201 and the sliding vane 7 may be in contact with each other all the time and may not be separated from each other, thereby preventing the sliding vane 7 from colliding with the main translational member 1201 during movement, reducing noise, and prolonging the service life of the transmission component and the sliding vane 7.

In some embodiments, after the sliding plate 7 moves outward from the inner limit position for a certain distance, the secondary translational member 1202 contacts the air release flap 8, and drives the flap contact portion 1003 to close the air release flap 8.

Alternatively, when the sliding vane 7 is in the inner limit position, the secondary translational member 1202 contacts the guide surface 12016 and the discharge valve plate 8, so that when the sliding vane 7 starts to move outwards from the inner limit position, the secondary translational member 1202 immediately drives the discharge valve plate 8 to move towards the discharge hole 2 to close the discharge hole 2. Therefore, the auxiliary translation piece 1202 is always in contact with the guide surface 12016 and the exhaust valve plate 8, the instantaneous speed of the exhaust valve plate 8 for closing the exhaust hole 2 can be reduced, and the noise generated when the exhaust valve plate 8 closes the exhaust hole 2 is further reduced.

Optionally, when the slide 7 is in the inner limit position, the secondary translational member 1202 is in contact with the lower surface of the second horizontal segment 12014 of the primary translational member 1201, only after the primary translational member 1201 translates to the right by a predetermined distance, however, the secondary translational member 1202 contacts the guide surface 12016, when the sliding sheet 7 moves outwards from the inner extreme position, the main translational member 1201 is driven to move outwards, and at the moment, the upper end of the auxiliary translational member 1202 is in contact with the lower surface of the second horizontal segment 12014 of the main translational member 1201, so that the auxiliary translational member 1202 does not move downwards, after the sliding piece 7 and the main translational member 1201 move outwards for a preset distance, the upper end of the secondary translational member 1202 starts to contact with the guide surface 12016, so that the guide surface 12016 drives the secondary translational member 1202 to move downwards, in this case, the sub-translation member 1202 may contact the discharge valve sheet 8 to drive the discharge valve sheet 8 immediately when contacting the guide surface 12016, or may contact the discharge valve sheet 8 to drive the discharge valve sheet 8 after moving downward by a predetermined distance.

In some embodiments, the lift stopper 9 is disposed above the exhaust valve plate 8, the avoiding hole 901 is a circumferentially closed hole, and the secondary translational member 1202 can pass through the avoiding hole 901 to reciprocate along the axial direction of the avoiding hole 901, so that the avoiding hole 901 serves to guide the secondary translational member 1202.

In some embodiments, it is preferable that, in order to make the translational part 12 move smoothly, all spatial degrees of freedom are constrained except the translational degree of freedom of the translational part 12, and the constraint gap is less than or equal to 0.05 mm.

The following describes the compression mechanism 300 according to some specific examples of the present invention with reference to the drawings.

As shown in fig. 1 to 12, a compression mechanism 300 according to an embodiment of the present invention includes a cylinder 1, a piston 3, a crankshaft 4, an upper bearing 5, a lower bearing 6, a vane 7, an exhaust valve sheet 8, a lift stopper 9, and a rocker 10. The cylinder 1 is provided with a cylinder chamber 101, the upper bearing 5 and the lower bearing 6 are respectively arranged on the upper surface and the lower surface of the cylinder 1 to seal the cylinder chamber 101 of the cylinder 1, the piston 3 is arranged in the cylinder chamber 101, one end of the crankshaft 4 is provided with an eccentric part 401, the piston 3 is sleeved on the eccentric part 401, and the crankshaft 4 drives the piston 3 to eccentrically rotate in the cylinder chamber 101.

A slide sheet groove 102 is arranged in the cylinder 1, and the inner end of the slide sheet groove 102 is communicated with the cylinder chamber 101. The inner end of the slide 7 abuts on the piston 3, and the slide 7 is reciprocally movable between an inner limit position and an outer limit position in the slide groove 102. The upper surface of upper bearing 5 is provided with holding tank 501, and exhaust hole 2 has been seted up to the tank bottom of holding tank 501, and exhaust hole 2 communicates with jar room 101. The exhaust valve plate 8 and the lift limiter 9 are arranged in the accommodating groove 501, the lift limiter 9 is located above the exhaust valve plate 8, the exhaust valve plate 8 is a reed valve plate with elasticity, the fixed end 801 of the exhaust valve plate 8 is fixed at the bottom of the accommodating groove 501, and the free end 802 is used for opening and closing the exhaust hole 2. The lift limiter 9 is provided with an avoidance hole 901 for avoiding the swing rod 10.

The pendulum rod 10 is swingable about a pivot 11 mounted on the upper bearing 5. The swing link 10 includes a link 1001, a slide contact 1002, and a valve plate contact 1003. The rod 1001, the slide contact 1002 and the valve plate contact 1003 are integrated. The pivot 11 is supported at the middle of the rod 1001, and the slide contact 1002 is disposed at an end of the rod 1001 corresponding to the slide 7, for example, formed by an end of the rod 1001 or a portion of an end of the rod 1001. The valve sheet contact portion 1003 is disposed at the other end of the rod 1001 and is substantially perpendicular to the rod 1001. The sheet contact part 1003 may be cylindrical and have a hemispherical lower end.

The swing rod 10 is linked with the sliding sheet 7, when the sliding sheet 7 moves outwards, the outer end of the sliding sheet 7 drives the sliding sheet contact part 1002, so that the rod body 1001 swings around the pivot 11, the valve sheet contact part 1003 moves towards the exhaust hole 2, and the exhaust valve sheet 8 is pushed to close the exhaust hole 2.

When the exhaust valve plate 8 closes the exhaust hole 2, the projection area of the exhaust hole 2 on the exhaust valve plate 8 is a windward area 804, and the contact position of the valve plate contact part 1003 and the exhaust valve plate 8 is located in the windward area 804. The lower end of the slider contact 1002 may be provided with a wear resistant or resilient material layer. A torsion spring may be mounted in the pivot 11 so that the slider contact 1002 is always in contact with the slider 7.

The operation of the compression mechanism 300 according to some specific examples of the present invention is described below.

As shown in fig. 9 and 12, when the crank angle is 180 degrees, the slide plate 7 moves to the inner limit position, the exhaust valve plate 8 does not close the exhaust hole 2 and allows the exhaust through the exhaust hole 2, and the plate contact portion 1003 of the swing lever 10 does not contact the exhaust valve plate 8. When the piston 3 continues to rotate from the 180-degree rotation angle, that is, the slide plate 7 moves from the inner limit position shown in fig. 12 to the outer limit position shown in fig. 11, the slide plate 7 drives the swing rod 10 to swing counterclockwise from the position shown in fig. 9, the valve plate contact portion 1003 contacts the exhaust valve plate 8 and drives the exhaust valve plate 8 downwards to gradually close the exhaust hole 2, and finally, the slide plate 7 moves to the outer limit position shown in fig. 11, and the valve plate contact portion 1003 of the swing rod 10 drives the exhaust valve plate 8 to completely close the exhaust hole 2.

As shown in fig. 13 to 17, a compression mechanism 300 according to other specific examples of the present invention includes a cylinder 1, a piston 3, a crankshaft 4, an upper bearing 5, and a lower bearing 6. The cylinder 1 has a cylinder chamber 101 therein, the upper bearing 5 and the lower bearing 6 are respectively mounted on the upper and lower ends of the cylinder 1 to close the cylinder chamber 101 of the cylinder 1, the piston 3 is mounted inside the cylinder chamber 101, one end of the crankshaft 4 is provided with an eccentric portion 401, the piston 3 is sleeved on the eccentric portion 401, and the crankshaft 4 drives the piston 3 to eccentrically rotate in the cylinder chamber 101.

A slide groove 102 is provided in the cylinder 1, and one end of the slide groove 102 communicates with the cylinder chamber 101. The slide sheet 7 is arranged in the slide sheet groove 102, the slide sheet 7 can move back and forth between an inner limit position and an outer limit position, and the inner end of the slide sheet 7 is abutted to the piston 3. The upper surface of upper bearing 5 is provided with holding tank 501, and exhaust hole 2 has been seted up to the tank bottom of holding tank 501, and exhaust hole 2 communicates with jar room 101. The accommodating groove 501 is also internally provided with an exhaust valve plate 8 and a lift limiter 9, the lift limiter 9 is arranged on the exhaust valve plate 8, the exhaust valve plate 8 is a reed valve plate with elasticity, one end of the exhaust valve plate 8 is a fixed end 801 fixed at the bottom of the accommodating groove 501, and the other end of the exhaust valve plate 8 is a free end 802 for opening and closing the exhaust hole 2. One end of the lift limiter 9 is provided with an avoidance hole 901.

The compression mechanism 300 further comprises a translational member 12, and the translational member 12 comprises a primary translational member 1201 and a secondary translational member 1202. The translational part 12 is linked with the slide 7. Specifically, when the slide sheet 7 moves outwards, the main translation member 1201 is driven to translate outwards, and the main translation member 1201 drives the auxiliary translation member 1202 to translate downwards so as to drive the exhaust valve sheet 8 to close the exhaust hole 2.

Specifically, the primary translational member 1201 is formed into a generally ladder-shaped structure and includes a first vertical section 12011, a first horizontal section 12012, a second vertical section 12013 and a second horizontal section 12014 which are connected in sequence, the first vertical section 12011 extends vertically and downwardly and abuts against the sliding vane 7, a guide surface 12016 which is inclined inwardly and downwardly or is arc-shaped is formed on the lower surface of the second horizontal section 12014, the upper end of the secondary translational member 1202 is of a curved surface structure and is used for abutting against the guide surface 12016, and the secondary translational member 1202 is fitted in the avoidance hole 901 and can reciprocate along the axial direction of the avoidance hole 901. When the sliding sheet 7 moves outwards, the outer end of the sliding sheet 7 pushes the first vertical section 12011 to move outwards, and then the auxiliary translation member 1202 is pushed to move downwards through the guide surface 12016, so that the exhaust valve sheet 8 is driven to close the exhaust hole 2.

The operation of the compression mechanism 300 according to other specific examples of the present invention will be described below.

As shown in fig. 12 and 16, when the crank angle is 180 degrees, the slide plate 7 moves to the inner limit position, the discharge valve plate 8 does not close the discharge hole 2 and allows discharge through the discharge hole 2, and the upper end of the secondary translational member 1202 does not contact the guide surface 12016 of the primary translational member 1201. When the piston 3 continues to rotate from a 180-degree angle, namely the sliding piece 7 moves from the inner limit position shown in fig. 12 to the outer limit position shown in fig. 11, the main translational piece of the sliding piece 7 translates from the position shown in fig. 16 to the position shown in fig. 17, the upper end of the auxiliary translational piece 1202 is in contact with the guide surface 12016, the auxiliary translational piece 1202 is driven to translate downwards, so that the exhaust valve plate 8 is driven to close the exhaust hole 2 gradually, and finally, the sliding piece 7 moves to the outer limit position shown in fig. 11, and the auxiliary translational piece 1202 drives the exhaust valve plate 8 to close the exhaust hole 2 completely.

In some embodiments, the rotary compressor may be a multi-cylinder compressor, and the rotary compressor may be a fixed speed compressor or a variable speed compressor.

In some embodiments, the maximum operating speed of the rotary compressor is greater than 150 revolutions per second and less than 240 revolutions per second. The rotary compressor implemented by the invention has more obvious effect in high-speed operation, for example, the rigidity of the exhaust valve plate 8 can be freely and flexibly designed, the rigidity can be designed to be very small, the timeliness and the reliability of closing the exhaust valve plate 8 are ensured, the exhaust valve plate 8 is easy to open, the exhaust resistance loss is small, and the exhaust noise is reduced.

The refrigeration apparatus according to an embodiment of the present invention includes the rotary compressor according to the above-described embodiment of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A compression mechanism, comprising:

the air cylinder is internally provided with a cylinder chamber and a slide sheet groove;

an exhaust port in communication with the cylinder chamber;

a piston;

a crankshaft for driving the piston to eccentrically rotate within the cylinder chamber;

an upper bearing and a lower bearing that rotatably support the crankshaft;

the sliding sheet is arranged in the sliding sheet groove and can move back and forth between an inner limit position and an outer limit position, and the inner end of the sliding sheet is abutted against the piston;

the exhaust valve plate is used for opening and closing the exhaust hole;

and the sliding sheet drives the exhaust valve sheet to close the exhaust hole when moving outwards.

2. The compressing mechanism as claimed in claim 1, wherein the transmission member contacts the discharge valve plate when the slide is at the inner limit position or contacts the discharge valve plate after the slide moves outward from the inner limit position by a predetermined distance to drive the discharge valve plate to close the discharge hole.

3. The compression mechanism as claimed in claim 1, wherein the upper bearing is provided above the cylinder to close an upper end of the cylinder chamber, the lower bearing is provided below the cylinder to close a lower end of the cylinder chamber, and the discharge hole is formed on at least one of the upper bearing and the lower bearing.

4. The compressing mechanism as set forth in claim 3, wherein the discharge hole is formed on the upper bearing, and the discharge valve sheet is a reed valve sheet and has a fixed end fixed on the upper bearing and a free end for opening and closing the discharge hole.

5. The compressing mechanism as set forth in claim 4, wherein a receiving groove is formed on an upper surface of the upper bearing, and the discharge valve plate is mounted in the receiving groove.

6. The compression mechanism as claimed in claim 1, wherein the free end of the exhaust valve plate has a windward area, the windward area is a projection area of the exhaust hole on the exhaust valve plate when the exhaust valve plate closes the exhaust hole, and the contact position of the transmission member and the exhaust valve plate is located in the windward area.

7. The compression mechanism as claimed in claim 1, wherein the exhaust hole is plural, and the transmission member is provided corresponding to at least one exhaust hole.

8. The compression mechanism as claimed in claim 1, further comprising a lift stopper for limiting a lift of the exhaust valve plate and provided with an avoidance hole for avoiding the transmission member.

9. The compressing mechanism as claimed in any one of claims 1 to 8, wherein the transmission member is a swing link, and the swing link is driven to swing around a pivot when the sliding piece moves outwards, so that the swing link drives the discharge valve plate to close the discharge hole.

10. The compressing mechanism as claimed in claim 9, wherein the swing rod includes a rod, a sliding piece contact portion and a valve plate contact portion, and the sliding piece moves outward to drive the rod to swing by pushing the sliding piece contact portion, so that the valve plate contact portion drives the exhaust valve plate to close the exhaust hole.

11. The compression mechanism as claimed in claim 10, wherein the slide contact portion is formed by the first end or a portion thereof of the rod, and the valve plate contact portion is disposed at the second end of the rod and extends from the rod toward a side of the exhaust hole.

12. The compression mechanism as claimed in any one of claims 1 to 8, wherein the transmission member includes a primary translational member and a secondary translational member, the slide plate is driven to translate when moving outwards, and the primary translational member drives the secondary translational member to translate so that the secondary translational member drives the exhaust valve plate to close the exhaust hole.

13. The compression mechanism as claimed in claim 12, wherein the primary translational member is provided with a guide surface for driving the secondary translational member, and the guide surface is a slope or an arc surface.

14. The compression mechanism as set forth in claim 12 wherein said primary translation member is connected to an outer end face of said slide.

15. The compression mechanism as claimed in claim 13, wherein the secondary translational member contacts the guide surface when the slide is at or moves outwardly a predetermined distance from the inner limit position.

16. A compression mechanism, comprising:

a piston;

an upper bearing and a lower bearing that rotatably support the crankshaft;

an exhaust hole formed on at least one of the upper bearing and the lower bearing, the exhaust hole communicating with the cylinder chamber;

the exhaust valve plate is used for opening and closing the exhaust hole;

and the swing rod drives the swing rod to swing around the pivot when the sliding sheet moves outwards so as to enable the swing rod to push the exhaust valve sheet to close the exhaust hole.

17. A compression mechanism, comprising:

a piston;

an upper bearing and a lower bearing that rotatably support the crankshaft;

the exhaust valve plate is used for opening and closing the exhaust hole;

the sliding sheet drives the main translation piece to translate outwards when moving outwards, and the main translation piece drives the auxiliary translation piece to translate downwards so as to drive the exhaust valve plate to close the exhaust hole.

18. A rotary compressor characterized by comprising the compression mechanism according to any one of claims 1 to 17.

19. The rotary compressor of claim 18, wherein the rotary compressor is a multi-cylinder compressor.

20. The rotary compressor of claim 18, wherein a maximum operating speed of the rotary compressor is greater than 150 rpm and less than 240 rpm.

21. The rotary compressor of claim 18, wherein the rotary compressor is a fixed speed compressor or a variable speed compressor.

22. A refrigerating device comprising a rotary compressor according to any one of claims 18 to 21.