CN111878393A

CN111878393A - Scroll structure and compressor

Info

Publication number: CN111878393A
Application number: CN202010898728.6A
Authority: CN
Inventors: 江波; 饗场靖; 黄柏英; 李小雷; 新宅秀信
Original assignee: Guangdong Midea Environmental Technologies Co Ltd
Current assignee: Guangdong Midea Environmental Technologies Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-11-03

Abstract

The invention provides a scroll structure and a compressor, wherein the scroll structure comprises: a first scroll; the second scroll is matched with the first scroll, the first scroll and the second scroll can move relatively, a groove is formed in one end, away from the first scroll, of the second scroll, and the second scroll is provided with a first through hole; the back pressure plate is arranged in the groove, and a gap is formed between the back pressure plate and the side wall of the groove; the floating plate is movably arranged on the back pressing plate, the floating plate covers the gap, a first cavity is formed among the second scroll plate, the back pressing plate and the floating plate, and the first through hole is communicated with the first cavity. According to the scroll structure provided by the invention, the back pressure plate is arranged in the groove of the second scroll plate, so that the outer wall of the whole second scroll plate is integrated, the airtightness between the discharge chamber and the suction chamber is further enhanced, and the compression efficiency is further improved.

Description

Scroll structure and compressor

Technical Field

The invention relates to the field of compressors, in particular to a scroll structure and a compressor.

Background

In the related art, as shown in fig. 1, a scroll compressor 100' includes: casing 300 ', discharge cover 400 ', frame 500 ', static scroll 220 ', dynamic scroll 210 ', back pressure plate 230 ', and floating plate 240 '.

Wherein the static scroll 220 'and the dynamic scroll 210' together form a suction chamber, an intermediate pressure chamber, and a discharge chamber, the dynamic scroll 210 'being movable relative to the static scroll 220'.

In order to ensure the adhesion between the static scroll 220 ' and the dynamic scroll 210 ', a back pressure plate 230 ' is disposed on the top of the static scroll 220 ', a floating plate 240 ' is disposed on the back pressure plate 230 ', the back pressure plate 230 ' and the floating plate 240 ' form a back pressure chamber 282 ', and the back pressure chamber 282 ' is communicated with an intermediate pressure chamber, so that when the static scroll 220 ' and the dynamic scroll 210 ' perform a compression operation, the pressure in the intermediate pressure chamber pressurizes the back pressure chamber 282 ', thereby pushing the floating plate 240 ', the floating plate 240 ' floats upwards to abut against the discharge cover 400 ' of the compressor 100 ', and further the static scroll 220 ' is pressed toward the dynamic scroll 210 '.

However, in such a structure, the back pressure plate 230 'is disposed on the top of the static scroll 220', so that the sealing performance of the sealing ring 920 'is affected if the distance between the connection points between the back pressure plate 230' and the static scroll 220 'is long, and the sealing performance between the discharge chamber and the suction chamber is poor, thereby affecting the performance of the compressor 100'.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

To this end, a first aspect of the invention provides a scroll structure.

A second aspect of the present invention provides a compressor.

In view of the above, according to an embodiment of the first aspect of the present invention, the present invention provides a scroll structure, including: a first scroll; the second scroll is matched with the first scroll, the first scroll and the second scroll can move relatively, a groove is formed in one end, away from the first scroll, of the second scroll, and the second scroll is provided with a first through hole; the back pressure plate is arranged in the groove, and a gap is formed between the back pressure plate and the side wall of the groove; the floating plate is movably arranged on the back pressing plate, the floating plate covers the gap, a first cavity is formed among the second scroll plate, the back pressing plate and the floating plate, and the first through hole is communicated with the first cavity.

According to the scroll structure provided by the invention, the first scroll plate and the second scroll plate form the suction chamber, the intermediate pressure chamber and the discharge chamber, so that when the first scroll plate and the second scroll plate perform compression operation, a refrigerant is sucked by the suction chamber, compressed by the intermediate pressure chamber and discharged into the discharge chamber, and thus the compression operation is completed.

Further, a groove is formed in one end, deviating from the first scroll, of the second scroll, a back pressure plate is arranged in the groove, a gap is formed between the back pressure plate and the side wall of the groove, and a floating plate is arranged on the gap in a covering mode. And then form first cavity between second vortex dish, back pressure plate and the kickboard, still be provided with first through-hole on the second vortex dish, first cavity of first through-hole intercommunication. Specifically, the first through hole communicates the first chamber and the intermediate pressure chamber. And then when first vortex dish and second vortex dish carried out the compression operation, the refrigerant of intermediate pressure intracavity provided pressure for first cavity, and then made the kickboard remove, and then when the kickboard was restricted, the pressure in the first cavity forces the second vortex dish to remove to first vortex dish, is about to the second vortex dish and presses to first vortex dish, and then can strengthen the seal between first vortex dish and the second vortex dish, prevents the refrigerant leakage, promotes compression efficiency.

And, because the back pressure plate sets up in the recess of second vortex dish, consequently, the outer wall of whole second vortex dish is integrative, and then has strengthened the leakproofness between discharge chamber and the suction chamber, has further promoted compression efficiency.

In addition, according to the scroll component in the above technical scheme provided by the invention, the following additional technical features can be provided:

in the above technical solution, further, the method further includes: a first seal disposed between the floating plate and the second scroll; and the second sealing element is arranged between the floating plate and the back pressure plate.

In the technical scheme, the first sealing element is arranged between the floating plate and the second scroll, the second sealing element is arranged between the floating plate and the back pressure plate, the joint of the floating plate and the second scroll is ensured, the tightness of the joint of the floating plate and the back pressure plate is ensured, the leakage of an intermediate pressure chamber between the first scroll and the second scroll is avoided, and the compression performance of the first scroll and the second scroll is ensured.

In any of the above technical solutions, further, the groove is a step groove, and the first step surface of the step groove is opposite to the floating plate; and/or the back pressure plate has a stepped structure, and a second step face of the stepped structure is opposite to the floating plate.

In the technical scheme, the floating plate is supported by the first step surface arranged on the second scroll, so that the height of the floating plate is ensured, the floating plate is limited, and the pressure of the second scroll is further applied. Similarly, the floating plate is supported by the second step surface arranged on the back pressure plate, so that the height of the floating plate is ensured, the floating plate is limited, and the pressing of the second scroll is facilitated. The floating plate can be supported by the first step surface arranged on the second scroll and the second step surface arranged on the back pressing plate, so that the height of the floating plate is ensured, the floating plate is limited, and the pressing of the second scroll is facilitated.

In any of the above solutions, further, the first scroll includes: a first tray body; the first vortex tooth is arranged on the first disc body and matched with the second vortex disc.

In this technical scheme, first vortex dish includes first disk body and first vortex tooth, and first vortex tooth can cooperate with the second vortex dish to carry out the compression operation.

In any of the above solutions, further, the second scroll includes: the groove is formed in one end, away from the first scroll plate, of the second disc body, a first through hole is formed in the second disc body, and a second through hole is further formed in the second disc body; the second vortex tooth is arranged at the other end of the second disc body, which is back to the groove.

In this technical scheme, the second vortex dish includes second disk body and second vortex tooth, but the relative both ends of second disk body are provided with the second vortex tooth of recess respectively, and then when being located the first cavity of recess and filling into the refrigerant, can make second vortex tooth and first vortex dish offset to promote the compactness between first vortex dish and the second vortex dish.

The second through hole is used for discharging the refrigerant compressed by the first scroll and the second scroll.

In any of the above technical solutions, further, the back pressure plate includes: the backpressure main body is connected to the second scroll plate, a gap is formed between at least part of the edge of the backpressure main body and the side wall of the groove, and a third through hole is formed in the backpressure main body; the bulge is arranged around the third through hole and extends towards one side of the first scroll plate.

In this technical scheme, the backpressure board includes backpressure main part and arch, specifically, is provided with the third through-hole in the backpressure main part, and the arch encircles the third through-hole and sets up. The third through hole is communicated with the second through hole, one side of the bulge provides a moving track for the floating plate, and the floating plate can move along the bulge. The other side of the protrusion provides an extension channel for the second through hole, so that the refrigerant discharged from the second through hole is led out, and the compressed refrigerant is convenient to discharge.

In any of the above technical solutions, further, the method further includes: the first check valve is positioned in the second cavity and used for closing or opening the fourth through hole; the back pressure plate is also provided with a fifth through hole which is communicated with the second cavity and the third through hole.

In the technical scheme, a fourth through hole is formed in the second scroll, a second cavity is formed between the back pressure plate and the second scroll, and the fourth through hole is communicated with the second cavity. Specifically, the fourth through hole is connected with the second chamber and the intermediate pressure chamber, and then an auxiliary discharge channel is arranged for the scroll structure, so that when the pressure of the refrigerant compressed by the first scroll and the second scroll is lower, the refrigerant is discharged through the fourth through hole, or is simultaneously discharged through the fourth through hole and the second through hole, and the compression efficiency of the scroll structure is improved.

In any of the above technical solutions, further, the method further includes: a screw for fixing the back pressure plate to the second scroll; and the third sealing element is arranged between the back pressure plate and the second scroll plate.

In this technical scheme, set up the third sealing member between back pressure plate and second scroll to fix the back pressure plate on the second scroll through the screw, and then increase the seal between back pressure plate and the second scroll, avoid producing between first cavity and the second through-hole and leak, guarantee the effect that bulldozes of first cavity to the second scroll.

In any of the above technical solutions, further, the floating plate includes: the floating plate main body is provided with a sixth through hole, and the back pressure plate penetrates through the sixth through hole; the supporting part is arranged on one side, deviating from the first scroll plate, of the floating plate main body, and the supporting part is arranged around the sixth through hole.

In this technical solution, the floating plate includes a floating plate main body and a support portion. Be provided with the sixth through-hole in the main part, the sixth through-hole is worn to locate by the backpressure board, and the supporting part encircles the setting of sixth through-hole to other parts are supported to the kickboard, in order to realize the restriction to the kickboard.

According to a second aspect embodiment of the present invention, there is provided a compressor comprising: a housing; a discharge cover disposed inside the case; the frame is arranged in the shell, and the frame and the discharge cover are arranged at intervals; and, as in the scroll structure proposed in any of the above technical solutions, the first scroll plate in the scroll structure is movably disposed on the frame; and the second check valve is arranged on the first scroll plate and used for closing or opening the second through hole of the first scroll plate.

The compressor provided by the invention comprises the scroll structure provided by any one of the above technical solutions, so that the compressor has all the advantages of the scroll structure provided by any one of the above technical solutions, and the steps are stated in one.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, 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 schematic view of a structure of a compressor in the related art;

FIG. 2 is a schematic structural view of a scroll structure provided by one embodiment of the present invention;

FIG. 3 is an exploded view of a portion of a scroll structure provided in accordance with one embodiment of the present invention;

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

fig. 5 is a schematic structural diagram of a partial structure of a compressor according to an embodiment of the present invention.

Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:

100 'compressor, 300' casing, 400 'discharge cover, 500' frame, 210 'dynamic scroll, 220' static scroll, 230 'back pressure plate, 240' floating plate, 282 'back pressure cavity, 920' seal ring;

the correspondence between the reference numerals and the names of the components in fig. 2 to 5 is:

100 compressor, 200 scroll configuration, 210 first scroll, 212 first disk, 214 first scroll tooth, 216 connection, 220 second scroll, 222 second disk, 2222 first through hole, 2224 second through hole, 2226 fourth through hole, 224 second scroll tooth, 226 groove, 2262 first wall, 230 backpressure plate, 232 backpressure body, 2322 third through hole, 234 bulge, 2342 second wall, 240 floating plate, 242 floating plate body, 244 support portion, 250 first seal, 260 second seal, 270 first check valve, 282 first chamber, 284 second chamber, 286 suction chamber, 288 intermediate pressure chamber, 290 discharge chamber, 300 casing, 400 discharge cover, 500 frame, 510 first frame, 520 second frame, 600 second check valve, 610 slide, 620 check plate, 700 discharge pipe, 710 third check valve, 800 suction pipe, 900 motor configuration 910, shaft 920, third seal.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. 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.

A scroll structure 200 and a compressor 100 provided according to some embodiments of the present invention are described below with reference to fig. 2 through 5.

Example 1:

as shown in fig. 2 and 3, according to a first aspect embodiment of the present invention, an embodiment of the present invention provides a scroll structure 200 for a compressor 100, the scroll structure 200 including: a first scroll 210 and a second scroll 220 cooperating with the first scroll 210. The first scroll 210 and the second scroll 220 may cooperate to form: a suction chamber 286, an intermediate pressure chamber 288, and a discharge chamber 290.

Specifically, the first scroll 210 is dynamic, the second scroll 220 is static, and when the first scroll 210 moves around the rotation shaft 910, the refrigerant is sucked through the suction chamber 286, compressed through the intermediate pressure chamber 288, and discharged into the discharge chamber 290, so that the refrigerant is discharged, thereby completing a compression operation.

Further, the scroll structure 200 further includes: a back pressure plate 230 and a floating plate 240. The end of the second scroll 220 away from the first scroll 210 is provided with a groove 226, the inner side wall of the groove 226 is a first wall 2262, the back pressure plate 230 is arranged in the groove 226, the outer side wall of the back pressure plate 230 is a second wall 2342, the first wall 2262 is opposite to the second wall 2342, and a gap is formed between the first wall 2262 and the second wall 2342, two sides of the floating plate 240 are movably connected with the first wall 2262 and the second wall 2342 respectively, and then a first chamber 282 is formed under the surrounding arrangement of the second scroll 220, the back pressure plate 230 and the floating plate 240. The second scroll 220 is further provided with a first through hole 2222, and the first through hole 2222 communicates the first chamber 282 with the intermediate pressure chamber 288.

Specifically, when the first scroll 210 and the second scroll 220 perform a compression operation, the refrigerant in the intermediate pressure chamber 288 is pressurized by the pressure, and is pressurized into the first chamber 282 through the first through hole 2222, so that the floating plate 240 is urged to move outward. On this basis, the movement of the floating plate 240 may be restricted, so that the pressure in the first chamber 282 will act on the second scroll 220 to press the second scroll 220 toward the first scroll 210, thereby ensuring the close connection of the first scroll 210 and the second scroll 220, i.e., the independence of the suction chamber 286, the intermediate pressure chamber 288, and the discharge chamber 290, and further improving the compression effect and the compression efficiency of the scroll structure 200.

Moreover, since the back pressure plate 230 is disposed in the groove 226 of the second scroll 220, the gap of the first chamber 282 includes a gap between the floating plate 240 and the second scroll 220, a gap between the floating plate 240 and the back pressure plate 230, and a gap between the back pressure plate 230 and the second scroll 220, that is, the first chamber 282 of the scroll structure 200 provided by the present invention has only three gaps. In the back pressure chamber in the related art, two gaps are formed between the back pressure plate 230 and the second scroll 220, in addition to the gap between the floating plate 240 and the second scroll 220 and the gap between the floating plate 240 and the back pressure plate 230, so that the first chamber 282 in the scroll structure 200 provided by the invention has the advantages that the gaps are reduced, the sealing structure for the first chamber 282 is simplified, the production cost is reduced, the sealing effect is improved, and the compression efficiency of the scroll structure 200 is ensured.

Further, the shape, structure and number of the first chambers 282 may be arbitrarily set as desired. For example: providing an annular first chamber 282, i.e., the first wall 2262 of the second scroll 220 is completely spaced from the second wall 2342 of the back pressure plate 230; alternatively, a semi-annular first chamber 282 is provided, i.e., the first wall 2262 of the second scroll 220 is partially spaced from the second wall 2342 of the back pressure plate 230; alternatively, a plurality of first chambers 282 may be provided, i.e., spaced apart portions of the first wall 2262 of the second scroll 220 and the second wall 2342 of the back pressure plate 230 may contact.

The shape, structure and number of the first through holes 2222 may be arbitrarily set as required. For example: three first through holes 2222 are uniformly provided on the second scroll 220 to ensure uniformity of the force applied to the floating plate 240. Of course, one, two, four, five, etc. may be provided in other embodiments of the present invention.

Specifically, one first chamber 282 communicates with at least one first through hole 2222.

Further, the first wall 2262 and/or the second wall 2342 are annular in configuration.

Example 2:

as shown in fig. 2, in addition to embodiment 1, the scroll mechanism further includes: a first seal 250 disposed between the second scroll 220 and the floating plate 240. Wherein the first seal 250 is disposed between the floating plate 240 and the first wall 2262.

Specifically, the first seal 250 is a seal ring.

As shown in fig. 2, a mounting groove may be provided on the floating plate 240, and the first sealing member 250 may be inserted into the mounting groove, and another portion may abut against the second scroll 220, so that the first sealing member 250 is compressed, thereby sealing between the floating plate 240 and the second scroll 220. Specifically, the first seal 250 abuts the first wall 2262 of the second scroll 220.

Of course, a mounting groove may be provided on the second scroll 220, and the first sealing member 250 is inserted into the mounting groove, and another portion of the first sealing member 250 may abut against the floating plate 240, so that the first sealing member 250 is pressed to seal the floating plate 240 and the second scroll 220. Specifically, the mounting groove is provided on the first wall 2262 of the second scroll 220.

Example 3:

as shown in fig. 2, in addition to embodiment 1 or embodiment 2, the scroll mechanism further includes: a second seal 260 disposed between the back pressure plate 230 and the floating plate 240. Wherein the second sealing member 260 is disposed between the floating plate 240 and the second wall 2342.

Specifically, the second seal 260 is a seal ring.

As shown in fig. 2, a mounting groove may be provided on the floating plate 240, and the second sealing member 260 may be inserted into the mounting groove and another portion may abut against the back pressure plate 230, so that the second sealing member 260 is pressed to seal between the floating plate 240 and the back pressure plate 230. Specifically, the second seal 260 abuts the second wall 2342 of the back pressure plate 230.

Of course, a mounting groove may be provided on the back pressure plate 230, and another portion of the second sealing member 260 may be inserted into the mounting groove and may abut against the floating plate 240, so that the second sealing member 260 is pressed to seal between the floating plate 240 and the back pressure plate 230. Specifically, the mounting groove is provided on the second wall 2342 of the back pressure plate 230.

Example 4:

on the basis of any one of embodiments 1 to 3, further, the groove 226 on the second scroll 220 is provided as a stepped groove, and a first stepped surface of the groove 226 faces the floating plate 240. Specifically, the first wall 2262 has a first step surface thereon.

That is, the first step surface in the groove 226 may be used to support the floating plate 240 and thus the floating plate 240, and thus, may be maintained at a specific position even when the floating plate 240 does not have a pressure in the first chamber 282. Specifically, when the compressor 100 is applied, the floating plate 240 abuts against the discharge cover 400 of the compressor 100 through the support of the first step surface, that is, when the floating plate 240 is not stressed, the floating plate 240 also abuts against the discharge cover 400, and then after the floating plate 240 is stressed, the floating plate 240 remains still, so that the floating plate 240 is prevented from bouncing and colliding with the discharge cover 400, noise is reduced, and the service lives of the floating plate 240 and the discharge cover 400 are prolonged.

Example 5:

in addition to any one of embodiments 1 to 3, a step structure is further provided on the back pressure plate 230, and a second step surface on the back pressure plate 230 faces the floating plate 240. Specifically, the second wall 2342 has a second stepped surface thereon.

That is, the floating plate 240 may be supported by the second step surface of the back pressure plate 230, and the floating plate 240 may be supported, and may be maintained at a specific position even when the floating plate 240 does not have a pressure in the first chamber 282. Specifically, when the floating plate 240 is applied to the compressor 100, the floating plate 240 abuts against the discharge cover 400 of the compressor 100 through the support of the second step surface, that is, when the floating plate 240 is not stressed, the floating plate 240 also abuts against the discharge cover 400, and then after the floating plate 240 is stressed, the floating plate 240 remains still, so that the floating plate 240 is prevented from bouncing and colliding with the discharge cover 400, noise is reduced, and the service lives of the floating plate 240 and the discharge cover 400 are prolonged.

Example 6:

as shown in fig. 2 and 3, in addition to any one of embodiments 1 to 3, further, a step structure is provided on the back pressure plate 230, and a second step surface on the back pressure plate 230 faces the floating plate 240; the groove 226 on the second scroll 220 is provided as a stepped groove, and a first step surface of the groove 226 faces the floating plate 240. Specifically, the first wall 2262 has a first stepped surface thereon, and the second wall 2342 has a second stepped surface thereon.

That is, the floating plate 240 and thus the floating plate 240 may be supported by the first step surface in the groove 226 and the second step surface of the back pressure plate 230 together, and may be maintained at a specific position even when the floating plate 240 does not have pressure in the first chamber 282. Specifically, when the floating plate 240 is applied to the compressor 100, the floating plate 240 abuts against the discharge cover 400 of the compressor 100 through the support of the second step surface, that is, when the floating plate 240 is not stressed, the floating plate 240 also abuts against the discharge cover 400, and then after the floating plate 240 is stressed, the floating plate 240 remains still, so that the floating plate 240 is prevented from bouncing and colliding with the discharge cover 400, noise is reduced, and the service lives of the floating plate 240 and the discharge cover 400 are prolonged.

Further, a suction port is opened in a side wall of an outer ring of the second scroll 224 to suck the refrigerant between the first scroll 210 and the second scroll 220.

Example 7:

as shown in fig. 2, on the basis of any one of embodiments 1 to 6, further, the first scroll 210 includes a first disc 212 and a first scroll tooth 214 provided on one side of the first disc 212. The first scroll teeth 214 and the second scroll 220 are adapted to perform a compression operation.

Further, a connecting portion 216 is further disposed at an end of the first disc body 212 facing away from the first scroll tooth 214, and the connecting portion 216 is used for being connected with a rotating shaft 910 of the motor structure 900 of the compressor 100, so as to realize rotation of the reversing first scroll 210, thereby completing the compression operation.

Example 8:

as shown in fig. 2, in addition to any one of embodiments 1 to 7, further, the second scroll 220 includes: a second disk 222 and a second scroll tooth 224 disposed at an end of second disk 222, and a groove 226 disposed at an end of second disk 222 opposite second scroll tooth 224. Wherein, a second through hole 2224 is further provided on the second tray body 222. Specifically, the second scroll teeth 224 are adapted to the first scroll 210 for compression. More specifically, the first wrap tooth 214 is adapted to the second wrap tooth 224.

In this embodiment, the groove 226 and the second scroll tooth 224 are respectively located at two opposite ends of the second disc 222, and the first chamber 282 in the groove 226 is forced to move the second disc 222 toward the first disc 212 in a short stroke, so as to ensure the sealing effect of the first scroll 210 and the second scroll 220.

The refrigerant compressed by the first scroll 210 and the second scroll 220 is discharged, that is, the refrigerant in the discharge chamber 290, through the second through holes 2224 of the second disc body 222. Specifically, when used in the compressor 100, the second through hole 2224 communicates with the discharge space of the compressor 100, and thus the refrigerant may be discharged out of the compressor 100 through the discharge space.

Specifically, since the position of the first chamber 282 and the position of the intermediate pressure chamber 288 may not match, when the first through hole 2222 is formed, a hole may be formed in the second plate 222 in the transverse direction, then the hole may be drilled in the position of the first chamber 282 and the position of the intermediate pressure chamber 288, and then the outlet of the hole may be sealed to form the first through hole 2222 in a bent shape, which is simple and reliable in the manner of forming the first through hole 2222.

Example 9:

as shown in fig. 2, in addition to any one of embodiments 1 to 8, further, the back pressure plate 230 includes a back pressure main body 232 and a protrusion 234 disposed on one side of the back pressure main body 232, and the back pressure main body 232 is provided with a third through hole 2322, and the third through hole 2322 is communicated with the second through hole 2224. The second wall 2342 is located on the outer peripheral side of the protrusion 234, and the inner peripheral side of the protrusion 234 surrounds the third through hole 2322.

In this embodiment, the protrusion 234 is in a ring shape, and further the first wall 2262 outside the protrusion 234 is used as a guide for the floating plate 240, so as to facilitate movement of the floating plate 240, and meanwhile, the refrigerant discharged from the second through hole 2224 through the third through hole 2322 inside the protrusion 234 is guided, so as to flow into the discharge space of the compressor 100, so as to facilitate discharge of the refrigerant.

Example 10:

as shown in fig. 2, in addition to any one of embodiments 1 to 9, a second chamber 284 and a fifth through hole communicating the second chamber 284 with the third through hole 2322 are further provided on the opposite side of the back pressure plate 230 from the second scroll 220, a fourth through hole 2226 communicating the second chamber 284 is further provided on the second scroll 220, and a first check valve 270 sealed on the fourth through hole 2226 is further provided in the second chamber 284. Specifically, the fourth through hole 2226 communicates the second chamber 284 with the intermediate pressure chamber 288, and the fifth through hole communicates the second chamber 284 with the discharge space of the compressor 100.

In this embodiment, a secondary refrigerant discharge flow channel is provided in the scroll structure 200, that is, the refrigerant compressed by the first scroll 210 and the second scroll 220 is discharged through the second through hole 2224 not only through the discharge chamber 290, but also partially through the intermediate pressure chamber 288 and the fourth through hole 2226, enters the second chamber 284, and then flows into the third through hole 2322 through the fifth through hole to be discharged. Further, under the condition that the refrigerant in the discharge chamber 290 may not be completely discharged or the refrigerant in the discharge chamber 290 may not be discharged, the refrigerant in the intermediate pressure chamber 288 may be discharged through the paths of the fourth through hole 2226, the second chamber 284 and the fifth through hole, so that the scroll structure 200 may adapt to different working conditions, and the performance and efficiency of the scroll structure 200 are improved.

Specifically, the first check valve 270 may be a pressure-opening valve that opens when the pressure of the intermediate pressure chamber 288 reaches a predetermined threshold value, so as to ensure the compression effect on the refrigerant.

Since the structure includes the second chamber 284, structurally, in order to ensure the sealing performance of the whole structure, the fourth through hole 2226 needs to be disposed inside the groove 226 and communicate the second chamber 284 with the third through hole 2322 through the fifth through hole of the back pressure plate 230. Moreover, the tightness of the entire scroll structure 200 can be further ensured on the basis that the third through hole 2322 extends to the second through hole 2224.

Example 11:

in addition to any one of embodiment 1 to embodiment 10, further, the back pressure plate 230 and the second scroll 220 are connected by screws.

Specifically, a through hole is formed in the back pressure plate 230, a screw hole is formed in the second scroll 220, the screw hole is a blind hole to ensure the sealing performance of the second scroll 220, and the back pressure plate 230 and the second scroll 220 are screwed through the screw passing through the back pressure plate 230, so that the back pressure plate 230 and the second scroll 220 are fixed.

Specifically, the number of screws may be arbitrarily set according to actual conditions, for example: 1, 2, 3, 4, 5, etc. In order to ensure the sealing performance between the back pressure plate 230 and the second scroll 220, more than 3 screws may be provided to ensure the sealing performance everywhere between the back pressure plate 230 and the second scroll 220.

Example 12:

as shown in fig. 3, in addition to any one of embodiments 1 to 11, a third seal 920 is further provided between the back pressure plate 230 and the second scroll 220.

Specifically, the third sealing member 920 is a sealing ring.

A mounting groove may be provided on the back pressure plate 230, and the third sealing member 920 may be inserted into the mounting groove, such that another portion of the third sealing member 920 abuts against the second scroll 220, such that the third sealing member 920 is pressed, thereby achieving sealing between the back pressure plate 230 and the second scroll 220.

A mounting groove may be provided on the second scroll 220, and the third sealing member 920 is inserted into the mounting groove, so that another portion of the third sealing member 920 abuts against the back pressure plate 230, and the third sealing member 920 is pressed, thereby sealing between the back pressure plate 230 and the second scroll 220.

The second scroll 220 and the back pressure plate 230 may be simultaneously provided with mounting grooves, the third sealing member 920 is inserted into the mounting grooves, and when the second scroll 220 contacts the back pressure plate 230, the third sealing member 920 is pressed, so as to achieve sealing between the back pressure plate 230 and the second scroll 220.

Example 13:

as shown in fig. 2, in addition to any one of embodiments 1 to 12, further, the floating plate 240 includes: a floating plate main body 242 and a support portion 244 provided at a section of the floating plate main body 242. Specifically, the floating plate main body 242 is provided with a sixth through hole, and the sixth through hole is sleeved outside the back pressure plate 230. More specifically, the sixth through hole is sleeved outside the protrusion 234 of the back pressure plate 230.

Also, when applied to the compressor 100, the movement of the floating plate 240 is restricted by the abutment of the support portion 244 against the discharge cover 400 of the compressor 100.

Example 14:

as shown in fig. 4 and 5, according to a second aspect embodiment of the present invention, there is provided a compressor 100 including: the casing 300, the discharge cap 400, the frame 500, the second check valve 600, and the scroll structure 200 as provided in any one of the above embodiments.

Specifically, the discharge cover 400 and the frame 500 are provided in the housing 300, and the discharge cover 400 and the frame 500 are spaced apart. The discharge cover 400 divides the inside of the casing 300 into a suction space where the frame 500 is located and a discharge space where the scroll structure 200 is provided on the frame 500. Specifically, the second scroll 220 may be fixed to the frame 500 by screws, and the first scroll 210 is overlapped on the frame 500, and thus the first scroll 210 may move relative to the second scroll 220.

The second check valve 600 is disposed at the second through hole 2224 of the second scroll 220, and thus prevents the refrigerant in the discharge space from flowing back after the refrigerant is discharged from the scroll structure 200.

The compressor 100 provided by the present invention includes the scroll structure 200 provided in any of the above embodiments, and therefore, has all the advantages of the scroll structure 200 provided in any of the above embodiments, and the steps are set forth herein.

Example 15:

as shown in fig. 5, in addition to embodiment 14, further, the compressor 100 further includes a motor structure 900, and the motor structure 900 has a rotating shaft 910. The rotation shaft 910 is connected to the connection portion 216 of the first scroll 210.

Wherein, the frame 500 comprises a first frame 510 and a second frame 520, the vortex structure 200 is arranged on the first frame 510, and the motor structure 900 is arranged on the second frame 520.

In this embodiment, the first scroll 210 is driven to move around the rotation shaft 910 by the rotation of the rotation shaft 910 in the motor structure 900, so as to perform the compression operation of the scroll structure 200.

Example 16:

as shown in fig. 5, on the basis of embodiment 14 or embodiment 15, further, the second check valve 600 is configured to be able to communicate the second through hole 2224 and the discharge space.

In this embodiment, the second check valve 600 may communicate the second through hole 2224 and the discharge space. That is, after the refrigerant is discharged to the discharge space through the second through hole 2224, the residual refrigerant in the discharge space can return to between the first scroll 210 and the second scroll 220 through the second through hole 2224 under the effect of pressure, thereby balancing the pressure difference between the intermediate pressure chamber 288 between the first scroll 210 and the second scroll 220 and the discharge space, and further completing the compression again at the first scroll 210 and the second scroll 220, and when the refrigerant is discharged, the refrigerant can be smoothly discharged into the discharge space, thereby reducing the resistance to the discharge of the refrigerant, and improving the compression efficiency of the scroll compressor 100.

Specifically, the second check valve 600 includes a slide 610 and a check plate 620. The check plate 620 is slidable in the first slide 610 and abuts against the second scroll 220, wherein when the check plate 620 abuts against the second scroll 220, a passing area between the discharge space and the second through hole 2224 is reduced, thereby limiting an amount of refrigerant discharged from the discharge space to the second through hole 2224. That is, the refrigerant in the discharge space does not flow back in a large amount, so that the amount of the refrigerant sucked into the first scroll 210 and the second scroll 220 is ensured, and the compression efficiency is improved.

Specifically, a plurality of discharge ports may be provided on the check plate 620, and a part of the discharge ports may be blocked by the second scroll 220 when the check plate 620 abuts against the second scroll 220.

Example 17:

as shown in fig. 5, in addition to any one of embodiments 14 to 16, further, a discharge pipe 700 and a suction pipe 800 are provided in the housing 300.

The discharge pipe 700 is provided with a third check valve 710.

In this embodiment, the compressor 100 further includes a discharge pipe 700 and a suction pipe 800, the discharge pipe 700 communicates with the discharge space, and the refrigerant in the discharge space is discharged through the discharge pipe 700 after the first scroll 210 and the second scroll 220 discharge the refrigerant to the discharge space. And, set up the third check valve 710 at the discharge pipe 700, and then after the refrigerant in the discharge space discharges via the discharge pipe 700, avoid the backward flow of refrigerant, and then make the discharge space not communicate with downstream equipment, and then guaranteed that the refrigerant volume in the discharge space is fixed, thereby promoted the balanced effect of pressure differential between discharge space and first vortex dish 210 and second vortex dish 220.

Example 18:

as shown in fig. 4 and 5, the present invention provides a compressor 100 including:

a chassis 300;

a discharge cover 400, the discharge cover 400 dividing an inner space of the cabinet 300 into a suction space and a discharge space;

a frame 500, the frame 500 being spaced apart from the discharge cap 400;

a first scroll 210 supported by the main frame 500, the first scroll 210 being configured to perform an orbiting motion with respect to the rotation shaft 910 in operation;

a second scroll 220 forming a suction chamber 286, an intermediate pressure chamber 288, and a discharge chamber 290 together with the first scroll 210, the first scroll 210 being movable with respect to the second scroll 220;

a back pressure plate 230 connected to the second scroll 220, a lower surface of the back pressure plate 230 facing an upper surface of the second scroll 220; and

a floating plate 240 movably connected to the back pressure plate 230 and the second scroll 220 to seal an upper portion of the chamber, the back pressure plate 230, the floating plate 240 and the second scroll 220 constituting a first chamber 282, and the first chamber 282 communicating with an intermediate pressure chamber 288 of the second scroll 220;

wherein the back pressure plate 230 contacts the upper surface of the end plate of the second scroll 220, a protrusion 234 extends from the back pressure plate 230, the protrusion 234 is annular, a second wall 2342 of which the outer wall of the protrusion 234 is annular is formed to surround the third through hole 2322, and

the floating plate 240 and the back pressure plate 230 are connected to the second scroll 220 such that the outer circumferential surface of the boss 234, i.e., the second wall 2342 contacts the inner circumferential surface of the floating plate 240;

the second scroll 220 forms a groove 226, and an inner side wall of the groove 226 forms a second wall 2342 in a ring shape, and an inner circumferential surface of the second annular wall contacts an outer circumferential surface of the floating plate 240.

According to the compressor 100 provided by the invention, the sealing ring between the lower surface of the back pressure plate 230 and the upper surface of the second scroll 220 needs the sealing exhaust pressure and the intermediate pressure with smaller sealing pressure difference, the structure of the sealing gasket is simplified, and the sealing reliability is improved. Meanwhile, the position of the fourth through hole 2226 may be arbitrarily set.

The invention provides a scroll structure 200 and a compressor 100. Among other things, the compressor 100 may include a casing 300, a discharge cover 400, a frame 500, a first scroll 210 supported by the frame 500, and a second scroll 220 forming a suction chamber 286, an intermediate pressure chamber 288, and a discharge chamber 290 together with the first scroll 210. The compressor 100 may further include a back pressure plate 230 connected to the second scroll 220. The compressor 100 may further include a floating plate 240 movably connected to the back pressure plate 230 and the second scroll 220 to seal an upper portion of a chamber thereof. The back pressure plate 230, the floating plate 240 and the second scroll 220 constitute a first chamber 282, and the back pressure chamber communicates with an intermediate pressure chamber 288 of the second scroll 220.

In the present invention, the terms "first", "second", and "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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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

In the description herein, 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

1. A scroll structure, comprising:

a first scroll;

the second scroll is matched with the first scroll, the first scroll and the second scroll can move relatively, a groove is formed in one end, away from the first scroll, of the second scroll, and the second scroll is provided with a first through hole;

the back pressure plate is arranged in the groove, and a gap is formed between the back pressure plate and the side wall of the groove;

the floating plate is movably arranged on the back pressing plate, the floating plate is covered on the gap, the second scroll plate, the back pressing plate and the floating plate form a first cavity, and the first through hole is communicated with the first cavity.

2. The scroll structure of claim 1, further comprising:

a first seal disposed between the floating plate and the second scroll;

and the second sealing element is arranged between the floating plate and the back pressure plate.

3. The scroll structure of claim 1,

the groove is a step groove, and a first step surface of the step groove is opposite to the floating plate; and/or

The back pressure plate is provided with a step structure, and a second step surface of the step structure is opposite to the floating plate.

4. The scroll structure of claim 3, wherein the first scroll plate comprises:

a first tray body;

the first vortex tooth is arranged on the first disc body, and the first vortex tooth is matched with the second vortex disc.

5. The scroll structure of any one of claims 1 to 4, wherein the second scroll plate comprises:

the groove is formed in one end, away from the first scroll plate, of the second disc body, the first through hole is formed in the second disc body, and a second through hole is further formed in the second disc body;

the second vortex tooth is arranged at the other end of the second disc body, which is back to the groove.

6. The scroll structure of any one of claims 1 to 4, wherein the back pressure plate comprises:

the backpressure main body is connected to the second scroll plate, a gap is formed between at least part of the edge of the backpressure main body and the side wall of the groove, and a third through hole is formed in the backpressure main body;

and the bulge surrounds the third through hole, and extends towards one side of the first scroll plate deviating from the bulge.

7. The scroll structure of claim 6, further comprising:

the second scroll plate is provided with a fourth through hole, a second cavity is arranged at the position, corresponding to the fourth through hole, of the back pressure plate, and the first check valve is located in the second cavity and used for closing or opening the fourth through hole;

the back pressure plate is further provided with a fifth through hole, and the fifth through hole is communicated with the second cavity and the third through hole.

8. The scroll structure of any one of claims 1 to 4, further comprising:

a screw for fixing the back pressure plate to the second scroll;

and the third sealing element is arranged between the back pressure plate and the second scroll plate.

9. The scroll structure of any one of claims 1 to 4, wherein the float plate comprises:

the floating plate main body is provided with a sixth through hole, and the back pressure plate penetrates through the sixth through hole;

the supporting part is arranged on one side, deviating from the first scroll plate, of the floating plate main body, and the supporting part winds the sixth through hole.

10. A compressor, comprising:

a housing;

a discharge cover disposed inside the case;

the frame is arranged in the shell, and the frame and the discharge cover are arranged at intervals; and the number of the first and second groups,

the scroll structure according to any one of claims 1 to 9, a first scroll plate of said scroll structure being movably disposed in said frame;

and the second check valve is arranged on the first scroll and used for closing or opening the second through hole of the first scroll.