CN210106172U - Rotary compressor and compression mechanism and refrigerating device thereof - Google Patents

Abstract

The utility model provides a compression mechanism, rotary compressor and refrigerating plant, compression mechanism includes: the air cylinder is provided with an air cylinder cavity, a sliding sheet groove and an air valve groove; the piston is arranged in the cylinder cavity and is in rolling fit with the cylinder cavity; the sliding sheet is arranged in the sliding sheet groove, and the inner end of the sliding sheet is matched with the piston; the air valve assembly is arranged in the air valve groove, and a second working cavity is formed in the space between the sliding sheet and the air valve assembly in the sliding sheet groove; the air valve assembly comprises a valve plate and an air suction valve plate, the valve plate is provided with an air suction channel, the air suction valve plate comprises a fixing portion and a moving portion, the fixing portion is connected with the valve plate in a welded mode, the moving portion is connected with the fixing portion, and the moving portion is suitable for opening or closing the air suction channel. The utility model discloses a fixed part with the valve block that breathes in links to each other with the valve plate welding for valve plate and the whole air valve groove of packing into of form that the valve block can be with the assembly module in, realized air valve assembly's modular assembly, simplified rotary compressor's assembly process, thereby improved assembly efficiency.

Description

Rotary compressor and compression mechanism and refrigerating device thereof

Technical Field

The utility model relates to a compressor technical field particularly, relates to a rotary compressor's compressing mechanism, rotary compressor including this compressing mechanism and refrigerating plant including this rotary compressor.

Background

At present, a structure for compressing at the back of a sliding vane exists in the industry of rotary compressors, specifically, the tail of a sliding vane groove is sealed, and the function of compressing gas is realized through the reciprocating motion of the sliding vane. The compression portion has a suction structure, a discharge structure, a seal structure, and the like.

The air suction structure and the air exhaust structure relate to parts such as an air suction valve plate, an air exhaust valve plate and a valve plate. However, the air suction valve plate and the valve plate need to be respectively installed in the air valve groove as independent components in the assembling process, and meanwhile, accurate alignment between the air suction valve plate and the valve plate is guaranteed.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, an object of the present invention is to provide a compression mechanism of a rotary compressor.

Another object of the present invention is to provide a rotary compressor including the above compression mechanism.

Still another object of the present invention is to provide a refrigerating apparatus comprising the above rotary compressor.

In order to achieve the above object, the present invention provides a compression mechanism of a rotary compressor, including: the air cylinder is provided with an air cylinder cavity, a sliding sheet groove and an air valve groove, the inner end of the sliding sheet groove is communicated with the air cylinder cavity, and the air valve groove is arranged at the outer end of the sliding sheet groove and is communicated with the sliding sheet groove; the piston is arranged in the cylinder cavity and is in rolling fit with the cylinder cavity; the sliding sheet is arranged in the sliding sheet groove, the inner end of the sliding sheet is matched with the piston, and a first working cavity is formed by the inner circumferential surface of the cylinder, the outer circumferential surface of the piston and a space between the sliding sheets; the air valve assembly is arranged in the air valve groove, and a second working cavity is formed in the space between the sliding sheet and the air valve assembly in the sliding sheet groove; the air valve assembly comprises a valve plate and an air suction valve plate, the valve plate is provided with an air suction channel communicated with the second working cavity, the air suction valve plate comprises a fixing portion and a moving portion, the fixing portion is connected with the valve plate in a welded mode, the moving portion is connected with the fixing portion, and the moving portion is suitable for moving relative to the valve plate to open or close the air suction channel.

The utility model discloses technical scheme of the first aspect provides a rotary compressor links to each other with the valve plate welding through the fixed part with the valve block of breathing in for valve plate and the valve block of breathing in can be with the whole dress of the form of assembly module air valve inslot, realized air valve assembly's modular assembly, simplified rotary compressor's assembly process, thereby improved assembly efficiency. Meanwhile, compared with the method that the valve plate and the air suction valve plate are accurately aligned in the air valve groove, the operation is easier to perform outside the air valve groove, so that the assembly difficulty is reduced, the assembly efficiency is further improved, the assembly precision of the air valve assembly is improved, and the sealing performance of the rotary compressor is improved. In addition, the suction valve plate and the valve plate are welded together to realize rigid connection, the tool can be adopted to carry out pre-positioning in the welding process to ensure the accuracy of the relative position between the suction valve plate and the valve plate, and meanwhile, the welding strength is high, so that the situations of displacement, deflection and the like caused by the impact on the suction valve plate in the use process can be effectively prevented, and the matching reliability of the suction valve plate and the valve plate in the use process is ensured.

Additionally, the utility model provides an among the above-mentioned technical scheme compressing mechanism can also have following additional technical characterstic:

in the above technical scheme, the height of the suction valve plate along the cylinder axis direction is smaller than the height of the valve plate along the cylinder axis direction.

Because the tail part of the sliding sheet groove is of a closed structure, the air valve assembly is assembled into the air valve groove along the axial direction of the air cylinder during assembly, then the upper bearing and the lower bearing are installed on the two end faces of the air cylinder, the end faces of the upper bearing and the lower bearing can limit the air valve assembly, and the sealing of the second working cavity is realized through the mutual matching relation. When the height of the air suction valve plate along the axis direction of the cylinder is smaller than the height of the valve plate along the axis direction of the cylinder, the problem that the installation of an upper bearing and a lower bearing is difficult due to the interference of the air suction valve plate and the upper bearing or the lower bearing in the assembling process, the sealing effect between the end face of the bearing and the end face of the cylinder is poor, the leakage of a second working chamber or even a first working chamber is caused, and therefore the energy efficiency of the compressor is guaranteed. Meanwhile, compared with the scheme that the height of the air suction valve plate in the direction of the axis of the cylinder is equal to the height of the valve plate in the direction of the axis of the cylinder, the size of the air suction valve plate is reduced, raw materials are saved, and the production cost is saved. Of course, the height of the suction valve plate along the cylinder axis direction may be equal to the height of the valve plate along the cylinder axis direction.

It can be understood that, for the case of multiple cylinders, the upper and lower bearings are replaced by one bearing and one partition plate, and the upper and lower bearings are matched with two end faces of the cylinder to realize sealing.

In the above technical scheme, the two ends of the valve plate along the axis direction of the cylinder are both protruded out of the air suction valve plate.

The two ends of the valve plate along the axis direction of the cylinder protrude out of the air suction valve block, and gaps are reserved between the two ends of the air suction valve block and the sealing structures (the upper bearing, the lower bearing or the bearing and the partition plate) on the two sides, so that the air suction valve block is prevented from influencing the installation of the sealing structures, and the energy efficiency of the compressor is improved. Meanwhile, compared with the scheme that one end of the height of the air suction valve plate along the axis direction of the cylinder is flush with one end of the height of the valve plate along the axis direction of the cylinder, the size of the air suction valve plate is further reduced, raw materials are further saved, and the production cost is further saved. Of course, one end of the height of the suction valve plate along the axis direction of the cylinder can be flush with one end of the height of the valve plate along the axis direction of the cylinder.

In any one of the above technical solutions, the width of the suction valve plate in the circumferential direction of the cylinder is greater than the width of the slide groove in the circumferential direction of the cylinder.

The width of the air suction valve plate in the circumferential direction of the air cylinder is larger than that of the sliding sheet groove in the circumferential direction of the air cylinder, so that the two ends of the air suction valve plate in the circumferential direction of the air cylinder can abut against the wall surface of the communicating opening, provided with the communicating sliding sheet groove, of the air valve groove, the balanced stress of the motion part of the air suction valve plate is facilitated, the motion part is prevented from inclining, tearing and the like, the use reliability of the air suction valve plate is improved, and the service life of the air suction valve plate is prolonged.

In any of the above technical solutions, optionally, the fixing portion and the valve plate are of an integrated structure welded and connected by a spot welding method.

The fixed part of the air suction valve plate is welded with the valve plate in a spot welding mode, so that the welding flux is saved, and the production cost is reduced. Specifically, laser welding, electron beam welding, or the like may be employed. Wherein, the quantity of the solder joint between fixed part and the valve plate is two at least to guarantee the welding reliability. Specifically, the number of the welding spots can be four, six or even more, and the welding spots are distributed at intervals along the circumferential direction of the fixing part, so that the welding reliability and the stress balance of the air suction valve plate are considered.

In the above technical scheme, the valve plate is provided with an exhaust passage, the suction valve plate is provided with an exhaust port communicated with the exhaust passage and the second working chamber, and at least a welding spot is arranged between the area of the exhaust port of the fixing part and the valve plate.

The valve plate is provided with an exhaust passage, one side of the valve plate, which is far away from the sliding sheet groove, is provided with an exhaust valve block, the exhaust valve block is used for opening or closing the exhaust passage on the valve plate, the air suction valve block is provided with an exhaust port, the exhaust port is positioned between the exhaust passage and the sliding sheet groove, the communication between the exhaust passage and the second working cavity is realized, and the gas in the second working cavity can be discharged through the exhaust passage. Wherein, be equipped with the solder joint between the regional and the valve plate in at least gas vent place of fixed part, guaranteed at least this region and valve plate welded fastening to the reliable cooperation between gas vent and the exhaust passage has been guaranteed. In addition, the gas vent generally sets up the root at the motion portion, therefore the gas vent place region is the afterbody region of valve plate, and this region and valve plate welded fastening at least are favorable to improving the fixed reliability of suction valve piece.

In any of the above technical solutions, optionally, the fixing portion and the valve plate are of an integrated structure welded and connected in a continuous welding manner.

The fixed part of the air suction valve plate is connected with the valve plate in a continuous welding mode, and compared with a spot welding mode, the air suction valve plate is beneficial to improving the welding strength and further improving the use reliability. Of course, the welding mode of the fixing part and the valve plate is not limited to the scheme, and in the actual production process, the corresponding welding mode can be selected according to different structures and actual requirements.

In the above technical scheme, the number of the welding positions of the fixed part and the valve plate is two, the two welding positions are respectively arranged on the two sides of the moving part along the axis direction of the cylinder or the two welding positions are respectively arranged on the two sides of the moving part along the circumferential direction of the cylinder.

The two welding parts of the fixed part and the valve plate are respectively arranged on the two sides of the moving part along the axis direction of the cylinder, so that the balance of stress of the air suction valve plate is facilitated, and the welding reliability is ensured.

The two welding parts of the fixed part and the valve plate are respectively arranged on the two sides of the moving part along the circumferential direction of the cylinder, so that the balance of stress of the air suction valve plate is facilitated, and the welding reliability is ensured.

The present invention provides a rotary compressor according to a second aspect, including a compression mechanism according to any one of the first aspect.

The utility model discloses the rotary compressor that technical scheme of second aspect provided, because of including any in the first aspect technical scheme compressing mechanism, therefore have all beneficial effects that any above-mentioned technical scheme had, no longer describe herein.

The third aspect of the present invention provides a refrigeration apparatus including a rotary compressor according to the second aspect.

The utility model discloses technical scheme of third aspect provides a refrigerating plant, because of including the second aspect technical scheme rotary compressor, therefore have the beneficial effect together that any above-mentioned technical scheme had, no longer describe herein.

In any of the above technical solutions, the refrigeration device is an air conditioner. Of course, a refrigerator or other cooling device may be used.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partially exploded schematic view of a compression mechanism according to some embodiments of the present invention;

FIG. 2 is a schematic structural view of an intake valve plate according to some embodiments of the present invention;

fig. 3 is a schematic structural view of a valve plate according to some embodiments of the present invention;

FIG. 4 is a schematic diagram of a valve assembly according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a valve assembly according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a valve assembly according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a valve assembly according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

the device comprises a cylinder 1, a cylinder cavity 11, a slide sheet groove 12, an air valve groove 13, a mounting surface 131, a communication port 132, a valve plate 2, an air suction channel 21, an air exhaust channel 22, an air suction valve plate 3, a fixing part 31, a moving part 32, an air exhaust port 33, a welding point 34, a welding part 35, an air exhaust valve plate 4 and a lift limiter 5.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The operation principle of the rotary compressor is as follows:

when the compressor operates, the volume in the first working cavity is constantly changed along with the eccentric motion of the piston in the first working cavity, so that the air in the first working cavity is compressed or expanded, the compressor leads low-pressure refrigerant into the first working cavity through the first air suction port, the low-pressure refrigerant forms high-pressure refrigerant after being compressed by the air cylinder 1, and the high-pressure refrigerant is discharged out of the air cylinder 1 through the first air discharge port. Here, since the sliding piece is always stopped against the piston, the cylinder 1 is always in the loading operation state when the compression mechanism is operated. Wherein the direction "in" is to be understood as the direction towards the centre of the cylinder 1 and the opposite direction is defined as "out", i.e. away from the centre of the cylinder 1.

When the compression mechanism is operated, the piston rotates in the first working chamber while the slide sheet reciprocates in the slide sheet groove 12. When the sliding vane moves towards the center of the first working chamber in the sliding vane groove 12, the volume of the second working chamber increases, and in the state that the four sides of the second working chamber are sealed, like the state of being vacuumized, when the difference between the suction pressure (i.e. the pressure in the pipeline connecting the suction port to the outside of the compressor) and the pressure in the second working chamber is enough to overcome the elastic force of the moving part 32 of the suction valve plate 3, the moving part 32 deforms towards the direction away from the valve plate 2, at this time, the moving part 32 no longer covers the air inlet channel, that is, the air inlet channel is in an open state, the air outside the cylinder 1 can be sucked into the second working chamber through the second suction port, the air pressure in the second working chamber gradually increases until the pressure difference between the air pressure in the second working chamber and the outside is reduced to restore the moving part 32, and the air inlet channel 21 is closed.

The exhaust valve plate 4 is arranged between the lift limiter 5 and the valve plate 2, the exhaust valve plate 4 has elasticity, the exhaust valve plate 4 is arranged close to one surface of the valve plate 2 far away from the slide plate groove 12, and the exhaust valve plate 4 covers the outlet of the exhaust channel 22 on the valve plate 2 under the undeformed condition so as to prevent the gas in the second working cavity from being exhausted from the exhaust channel 22. In the process that the sliding sheet moves along with the piston, when the second working chamber sucks air, the pressure in the second working chamber is always smaller than the exhaust pressure of the compressor, the exhaust valve sheet 4 is not deformed, and the exhaust channel 22 is in a closed state. When the slide sheet starts to move towards the center far away from the first working cavity, the volume of the second working cavity starts to be reduced at the moment, the second working cavity starts to compress air, when the pressure in the second working cavity reaches the exhaust pressure of the compressor, the exhaust valve plate 4 deforms in the direction far away from the valve plate 2 under the action of pressure difference, and at the moment, the exhaust valve plate 4 does not cover the exhaust channel 22 any more, so that the air in the second working cavity can be discharged from the exhaust channel 22. Thereby, the venting of the second working chamber can be automatically controlled.

A compression mechanism, a rotary compressor, and a refrigeration apparatus according to some embodiments of the present invention will be described below with reference to fig. 1 to 7.

Example one

As shown in fig. 1 to 3, an embodiment of the first aspect of the present invention provides a compression mechanism of a rotary compressor, including: cylinder 1, piston, gleitbretter and pneumatic valve subassembly.

Specifically, a cylinder cavity 11, a slide sheet groove 12 and an air valve groove 13 are formed on the cylinder 1, the inner end of the slide sheet groove 12 is communicated with the cylinder cavity 11, and the air valve groove 13 is arranged at the outer end of the slide sheet groove 12 and is communicated with the slide sheet groove 12; the piston is arranged in the cylinder cavity 11 and is in rolling fit with the cylinder cavity 11; the sliding sheet is arranged in the sliding sheet groove 12, the inner end of the sliding sheet is matched with the piston, and a first working cavity is formed by the inner circumferential surface of the cylinder 1, the outer circumferential surface of the piston and the space among the sliding sheets; the air valve assembly is arranged in an air valve groove 13, and a second working cavity is formed in a space between the sliding sheet and the air valve assembly in the sliding sheet groove 12; the air valve assembly comprises a valve plate 2 and an air suction valve plate 3, the valve plate 2 is provided with an air suction channel 21 communicated with the second working cavity, the air suction valve plate 3 comprises a fixing portion 31 connected with the valve plate 2 in a welding mode and a moving portion 32 connected with the fixing portion 31, and the moving portion 32 is suitable for moving relative to the valve plate 2 to open or close the air suction channel 21.

The utility model discloses the embodiment of the first aspect provides a rotary compressor links to each other with the welding of valve plate 2 through fixed part 31 with suction valve block 3 for valve plate 2 and suction valve block 3 can be in the whole air valve groove 13 of packing into of form with the assembly module, have realized air valve assembly's modular assembly, have simplified rotary compressor's assembly process, thereby have improved assembly efficiency. Meanwhile, compared with the method that the valve plate 2 and the air suction valve plate 3 are accurately aligned in the air valve groove 13, the operation is easier to perform outside the air valve groove 13, so that the assembly difficulty is reduced, the assembly efficiency is further improved, the assembly precision of the air valve assembly is improved, and the sealing performance of the rotary compressor is improved. In addition, the air suction valve plate 3 is welded with the valve plate 2 together to realize rigid connection, the accuracy of the relative position between the air suction valve plate 3 and the valve plate 2 can be ensured by adopting a tool to carry out pre-positioning in the welding process, and meanwhile, the high welding strength can effectively prevent the air suction valve plate 3 from shifting, deviating and the like caused by impact in the use process, so that the matching reliability of the air suction valve plate 3 and the valve plate 2 in the use process is ensured.

Further, the compressor includes a housing, a crankshaft, a bearing, etc., and a piston is operated along an inner wall surface of the cylinder chamber 11 and is fitted over an eccentric portion of the crankshaft. In the single-cylinder compressor, two axial ends of the cylinder 1 are respectively sealed by bearings, in the multi-cylinder compressor, one axial end of the cylinder 1 is sealed by a partition plate, and the other axial end of the cylinder 1 is encapsulated by another partition plate or a bearing, wherein the number of the cylinders 1 is not particularly limited.

Wherein, the matching mode of the inner end of the sliding sheet and the piston is not limited. Such as: the inner end of the sliding sheet can be hinged with the piston, and can also be in magnetic attraction or other modes to realize stop and support matching with the piston, or other modes are adopted, which are known technologies and are not described herein again.

It should be noted here that the cylinder chamber 11 is formed as a cylindrical chamber having an axis, the inner end of the slide groove 12 refers to an end of the slide groove 12 facing the axis, and the outer end of the slide groove 12 refers to an end of the slide groove 12 away from the axis. Wherein, the air valve groove 13 is opened at least at one side of the cylinder 1 in the axial direction for installing the air valve assembly, the size of the air valve groove 13 in the thickness direction of the slide sheet groove 12 is larger than the thickness of the slide sheet groove 12, so that the inner wall of the air valve groove 13 can form the installation surface 131 with the communication port 132.

Further, the height L of the suction valve plate 3 in the axial direction of the cylinder 1 is smaller than the height H of the valve plate 2 in the axial direction of the cylinder 1, as shown in fig. 4 to 7.

Because the tail part of the sliding sheet groove 12 is of a closed structure, the air valve assembly is assembled into the air valve groove 13 along the axial direction of the air cylinder 1 during assembly, then the upper bearing and the lower bearing are installed on two end faces of the air cylinder 1, the end faces of the upper bearing and the lower bearing can limit the air valve assembly, and the sealing of the second working cavity is realized through the mutual matching relationship. When the height of the air suction valve plate 3 along the axis direction of the air cylinder 1 is smaller than the height of the valve plate 2 along the axis direction of the air cylinder 1, the problem that the installation of an upper bearing and a lower bearing is difficult due to the interference of the air suction valve plate 3 and the upper bearing or the lower bearing in the assembling process can be effectively solved, the sealing effect between the end face of the bearing and the end face of the air cylinder 1 is poor, the leakage of a second working chamber or even a first working chamber is caused, and the energy efficiency of a compressor is guaranteed. Meanwhile, compared with the scheme that the height of the air suction valve plate 3 in the axial direction of the cylinder 1 is equal to the height of the valve plate 2 in the axial direction of the cylinder 1, the size of the air suction valve plate 3 is reduced, raw materials are saved, and the production cost is saved. Of course, the height of the suction valve plate 3 in the axial direction of the cylinder 1 may be equal to the height of the valve plate 2 in the axial direction of the cylinder 1.

It can be understood that, for the case of multiple cylinders 1, the upper and lower bearings are replaced by one bearing and one partition plate, and the upper and lower bearings are matched with the two end faces of the cylinder 1 to realize sealing.

Specifically, both ends of the valve plate 2 along the axial direction of the cylinder 1 protrude from the suction valve plate 3, as shown in fig. 4 to 7.

The two ends of the valve plate 2 along the axis direction of the cylinder 1 are protruded out of the air suction valve block 3, so that gaps are formed between the two ends of the air suction valve block 3 and the sealing structures (the upper bearing, the lower bearing or the bearing and the partition plate) on the two sides, the air suction valve block 3 is ensured not to influence the installation of the sealing structures, and the energy efficiency of the compressor is improved. Meanwhile, compared with the scheme that one end of the height of the air suction valve plate 3 in the axial direction of the air cylinder 1 is flush with one end of the height of the valve plate 2 in the axial direction of the air cylinder 1, the size of the air suction valve plate 3 is further reduced, raw materials are further saved, and the production cost is further saved. Of course, one end of the height of the suction valve plate 3 along the axial direction of the cylinder 1 may be flush with one end of the height of the valve plate 2 along the axial direction of the cylinder 1.

Further, the width of the suction valve sheet 3 in the circumferential direction of the cylinder 1 is larger than the width of the vane groove 12 in the circumferential direction of the cylinder 1, as shown in fig. 1.

The width of the air suction valve plate 3 along the circumferential direction of the cylinder 1 is greater than the width of the sliding plate groove 12 along the circumferential direction of the cylinder 1, so that the two ends of the air suction valve plate 3 along the circumferential direction of the cylinder 1 can be abutted against the wall surface of the communicating opening 132 of the air valve groove 13, which is provided with the communicating sliding plate groove 12, the balance stress of the movement part 32 of the air suction valve plate 3 is facilitated, the movement part 32 is prevented from inclining, tearing and the like, the use reliability of the air suction valve plate 3 is improved, and the service life of the air suction valve plate 3 is prolonged.

The fixing portion 31 and the valve plate 2 are integrally welded by spot welding, as shown in fig. 4 and 5.

The fixing part 31 of the air suction valve plate 3 is welded with the valve plate 2 in a spot welding mode, so that the welding flux is saved, and the production cost is reduced. Specifically, laser welding, electron beam welding, or the like may be employed. Wherein, the number of the welding points 34 between the fixing part 31 and the valve plate 2 is at least two to ensure the welding reliability.

Specifically, the number of the welding spots 34 may be four (as shown in fig. 5), six (as shown in fig. 4) or more, and the welding spots are distributed at intervals along the circumferential direction of the fixing portion 31, so as to achieve the welding reliability and the stress balance of the suction valve plate 3.

Further, the valve plate 2 is provided with an exhaust passage 22, the suction valve plate 3 is provided with an exhaust port 33 communicating the exhaust passage 22 and the second working chamber, as shown in fig. 2, and a welding point 34 is provided between at least a region of the fixed portion 31 where the exhaust port 33 is located and the valve plate 2, as shown in fig. 4 and 5.

The valve plate 2 is provided with an exhaust passage 22, one side of the valve plate 2, which is far away from the slide sheet groove 12, is provided with an exhaust valve plate 4, the exhaust valve plate 4 is used for opening or closing the exhaust passage 22 on the valve plate 2, the air suction valve plate 3 is provided with an exhaust port 33, and the exhaust port 33 is positioned between the exhaust passage 22 and the slide sheet groove 12, so that the communication between the exhaust passage 22 and the second working cavity is realized, and the gas in the second working cavity can be discharged through the exhaust passage 22. Wherein, the welding spot 34 is arranged between the area of at least the exhaust port 33 of the fixing part 31 and the valve plate 2, which ensures that at least the area is welded and fixed with the valve plate 2, thereby ensuring the reliable matching between the exhaust port 33 and the exhaust passage 22. In addition, the exhaust port 33 is generally disposed at the root of the moving portion 32, so that the region where the exhaust port 33 is located is the tail region of the valve plate 2, and at least the region is welded and fixed to the valve plate 2, which is beneficial to improving the fixing reliability of the intake valve sheet 3.

Example two

The difference from the first embodiment is that: the fixing portion 31 and the valve plate 2 are integrally welded to each other by continuous welding, as shown in fig. 6 and 7.

The fixing part 31 of the air suction valve plate 3 is connected with the valve plate 2 in a continuous welding mode, and compared with a spot welding mode, the welding strength is improved, and the use reliability is further improved. Of course, the welding manner of the fixing portion 31 and the valve plate 2 is not limited to the above scheme, and in the actual production process, the corresponding welding manner can be selected according to different structures and actual requirements.

Specifically, the fixed portion 31 and the valve plate 2 have two welding portions 35, and the two welding portions 35 are respectively provided on both sides of the moving portion 32 in the axial direction of the cylinder 1, as shown in fig. 7.

The number of the welding parts 35 of the fixing part 31 and the valve plate 2 is two, and the two welding parts 35 are respectively arranged on two sides of the moving part 32 along the axial direction of the cylinder 1, so that the stress balance of the air suction valve plate 3 is facilitated, and the welding reliability is ensured.

EXAMPLE III

The difference from the second embodiment is that: two welding portions 35 are provided on both sides of the moving portion 32 in the circumferential direction of the cylinder 1, respectively, as shown in fig. 6.

The number of the welding parts 35 of the fixing part 31 and the valve plate 2 is two, and the two welding parts 35 are respectively arranged on two sides of the moving part 32 along the circumferential direction of the cylinder 1, so that the stress balance of the air suction valve plate 3 is facilitated, and the welding reliability is ensured.

An embodiment of the second aspect of the present invention provides a rotary compressor, including a compression mechanism as in any one of the embodiments of the first aspect.

The embodiment of the second aspect of the present invention provides a rotary compressor, which comprises any one of the compression mechanisms of the embodiment of the first aspect, and therefore, has all the advantages of any one of the embodiments, and is not repeated herein.

An embodiment of the third aspect of the present invention provides a refrigeration device, including a rotary compressor as in the embodiment of the second aspect.

The embodiment of the third aspect of the present invention provides a refrigeration device, which has the beneficial effects of any of the above embodiments due to the rotary compressor comprising the embodiment of the second aspect, and is not repeated herein.

In any of the above embodiments, the refrigeration device is an air conditioner. Of course, a refrigerator or other cooling device may be used.

The compression mechanism of the rotary compressor provided in the present application is described below with reference to several specific examples, and is compared with the prior art.

In the related art of rotary compressors, there is a structure for compressing the back of a vane, which is a general structure of sealing the tail of a vane slot 12 and compressing gas by reciprocating the vane. The compression section includes a suction device, a discharge device, a sealing device, and the like.

The air suction device and the air exhaust device relate to parts such as an air suction valve plate 3, an air exhaust valve plate 4, a valve plate 2 and the like. Because the structure of the tail part of the sliding sheet groove 12 of the cylinder 1 is closed, the operation is difficult in the process of assembling parts, and a plurality of parts such as the cylinder 1, the air suction valve plate 3, the exhaust valve plate 4, the valve plate 2 and the like need to be assembled in sequence. In order to guarantee that this structure is more high efficiency when the assembly, the utility model provides an air valve structure has and makes simply, simple to operate, efficient characteristics.

Specifically, a compression mechanism includes: cylinder 1, piston, gleitbretter and pneumatic valve subassembly. The cylinder 1 is provided with a first working cavity, a slide sheet groove 12 and a valve plate 2 assembly groove (namely an air valve groove 13), the first working cavity is provided with a first air suction port and a first air exhaust port, and the valve plate 2 assembly groove is arranged at the outer end of the slide sheet groove 12 and communicated with the slide sheet groove 12; the piston is eccentrically and rotatably arranged in the first working cavity; the sliding sheet can be arranged in the sliding sheet groove 12 in a reciprocating motion mode, the front end of the sliding sheet is abutted against the piston, and a second working cavity is formed in the part, located at the tail end of the sliding sheet, of the sliding sheet groove 12; the structure is approximately to seal the tail part of the sliding sheet groove 12, and the function of compressing gas is realized through the reciprocating motion of the sliding sheet. The compression section includes a suction device, a discharge device, a sealing device, and the like.

The air valve assembly is arranged in the assembly groove of the valve plate 2 and comprises a valve plate 2, an exhaust valve plate 4, an air suction valve plate 3 and a lift limiter 5. The valve plate 2 is provided with a second air suction port and a second air exhaust port which are communicated with the second working cavity, the second air suction port penetrates through the valve plate 2 to form an air suction channel 21, and the second air exhaust port penetrates through the valve plate 2 to form an air exhaust channel 22; the suction valve plate 3 has a movable portion (i.e., a movable portion 32) for opening and closing the second suction port communicating with the second working chamber, and an exhaust port 33 (i.e., an exhaust port 33 provided in the suction valve plate 3), the exhaust port 33 communicating with the exhaust passage 22 of the valve plate 2.

Further, the suction valve plate 3 and the valve plate 2 are fixed in a welding mode. Referring to fig. 2, the suction valve plate 3 is provided with an exhaust port 33 and a moving part of the suction valve plate 3; referring to fig. 3, a valve plate 2 is schematically shown, and the valve plate 2 is also provided with a passage for a second discharge port and a second suction port, and a suction valve plate 3 is substantially fitted in the middle range thereof. Referring to fig. 4, the suction valve plate 3 may be laser welded to the valve plate 2, and the number of the welding points 34 may be 6 or 4 (refer to fig. 5). Preferably, the welding point is at least greater than 2 points in order to ensure reliability of the welding. If the number of welding points is relatively small, it is preferable to weld at least the tail area of the suction valve sheet 3 (i.e., the area where the discharge port 33 is located) so that the suction valve sheet 3 can be better fixed.

The air suction valve plate 3 and the valve plate 2 are welded together and rigidly connected, and a tool is adopted to carry out pre-positioning during welding to ensure the relative position between the air suction valve plate 3 and the valve plate 2. If the valve plate 2 and the suction valve plate 3 are made into a single part as before, the valve plate 2 and the suction valve plate 3 can be conveniently assembled in the cylinder 1, and as shown in fig. 1, the valve plate 2 and the suction valve plate 3 can be inserted and installed from the height direction of the cylinder 1, so that the installation efficiency is improved.

Taking the axial direction of the cylinder 1 as a reference, the height of the air suction valve plate 3 is L (shown in figure 2), the height of the valve plate 2 is H (shown in figure 3), and L is less than H; because the air valve assembly is assembled in the groove of the air cylinder valve plate assembly, the sealing device also comprises an upper bearing and a lower bearing, and the upper bearing and the lower bearing are assembled on two end surfaces of the air cylinder 1, the end surfaces of the upper bearing and the lower bearing can limit the air valve assembly, and the sealing of the second working cavity is realized through the mutual matching relationship. If the height of the suction valve plate is higher than that of the valve plate 2, the assembly and the cylinder 1 are assembled and then the phenomenon that the height of the suction valve plate is higher than that of the cylinder 1 is easy to occur, and therefore the upper bearing and the lower bearing are not easy to install on the end face of the cylinder 1, the sealing effect of the end face of the bearing and the end face of the cylinder 1 is poor, the leakage of the second working chamber or even the first working chamber is caused, and the energy efficiency of the compressor is influenced.

Referring to fig. 6 and 7, the suction valve plate 3 may also be fixed to the valve plate 2 by continuous welding, and the welding positions may be on the left and right sides of the moving portion of the suction valve plate, or on the upper and lower sides of the moving portion of the cylinder 1. Compared with the spot welding of fig. 4 and 5, the welding mode has better strength after welding, the reliability is further improved, and different welding modes of the above embodiments can be selected according to different air valve structures and actual requirements.

To sum up, the utility model provides a rotary compressor links to each other with the valve plate welding through the fixed part with the valve block of breathing in for valve plate and the valve block of breathing in can be with the whole dress of the form of assembly module air valve inslot, have realized air valve assembly's modular assembly, have simplified rotary compressor's assembly process, thereby have improved assembly efficiency. Meanwhile, compared with the method that the valve plate and the air suction valve plate are accurately aligned in the air valve groove, the operation is easier to perform outside the air valve groove, so that the assembly difficulty is reduced, the assembly efficiency is further improved, the assembly precision of the air valve assembly is improved, and the sealing performance of the rotary compressor is improved. In addition, the suction valve plate and the valve plate are welded together to realize rigid connection, the tool can be adopted to carry out pre-positioning in the welding process to ensure the accuracy of the relative position between the suction valve plate and the valve plate, and meanwhile, the welding strength is high, so that the situations of displacement, deflection and the like caused by the impact on the suction valve plate in the use process can be effectively prevented, and the matching reliability of the suction valve plate and the valve plate in the use process is ensured.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A compression mechanism of a rotary compressor, comprising:

the air cylinder is provided with an air cylinder cavity, a sliding sheet groove and an air valve groove, the inner end of the sliding sheet groove is communicated with the air cylinder cavity, and the air valve groove is arranged at the outer end of the sliding sheet groove and is communicated with the sliding sheet groove;

the piston is arranged in the cylinder cavity and is in rolling fit with the cylinder cavity;

the sliding sheet is arranged in the sliding sheet groove, the inner end of the sliding sheet is matched with the piston, and a first working cavity is formed by the inner circumferential surface of the cylinder, the outer circumferential surface of the piston and a space between the sliding sheets;

the air valve assembly is arranged in the air valve groove, and a second working cavity is formed in the space between the sliding sheet and the air valve assembly in the sliding sheet groove;

the air valve assembly comprises a valve plate and an air suction valve plate, the valve plate is provided with an air suction channel communicated with the second working cavity, the air suction valve plate comprises a fixing portion and a moving portion, the fixing portion is connected with the valve plate in a welded mode, the moving portion is connected with the fixing portion, and the moving portion is suitable for moving relative to the valve plate to open or close the air suction channel.

2. The compression mechanism of claim 1,

the height of the air suction valve plate along the axis direction of the cylinder is smaller than the height of the valve plate along the axis direction of the cylinder.

3. The compression mechanism of claim 2,

the valve plate is arranged on the cylinder body and is provided with a suction valve block.

4. The compression mechanism of any one of claims 1-3,

the width of the air suction valve plate in the circumferential direction of the air cylinder is larger than that of the slide plate groove in the circumferential direction of the air cylinder.

5. The compression mechanism of any one of claims 1-3,

the fixed part with the valve plate is the integral type structure that adopts spot welding mode welding to link to each other.

6. The compression mechanism of claim 5,

the valve plate is provided with an exhaust passage, the air suction valve plate is provided with an exhaust port communicated with the exhaust passage and the second working cavity, and at least a welding spot is arranged between the area of the exhaust port of the fixing part and the valve plate.

7. The compression mechanism of any one of claims 1-3,

the fixed part with the valve plate is the integral type structure that adopts continuous welding mode welding to link to each other.

8. The compression mechanism of claim 7,

the fixed part with the welding position of valve plate is two, two the welding position sets up respectively the motion portion is followed the both sides of cylinder axis direction or two the welding position sets up respectively the motion portion is followed the both sides of cylinder circumferential direction.

9. A rotary compressor characterized by comprising the compression mechanism as recited in any one of claims 1 to 8.

10. A refrigerating apparatus comprising the rotary compressor of claim 9.

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