A scroll compressor and an air conditioner using the same

Abstract

The present invention relates to the technical field of compressors, and it relates to a scroll compressor and an air conditioner applying the same. The scroll compressor includes a moving scroll disk, a stationary scroll disk, a back pressure chamber, and an exhaust passage. The exhaust passage is used for discharging the compressed fluid between the moving scroll disk and the stationary scroll disk. The scroll compressor includes a pressure guiding passage and a pressure reducing structure. The pressure guiding passage is used for introducing the exhaust pressure of the exhaust passage into the pressure reducing structure for pressure reduction treatment to obtain a reduced pressure, and intermittently introducing the reduced pressure into the back pressure chamber. According to the technical solution of the present invention, by providing the pressure reducing structure to perform primary pressure reduction on the exhaust pressure, and then intermittently introducing the reduced pressure into the back pressure chamber, the effect of secondary pressure reduction can be achieved. The cooperation of the pressure reducing structure and the intermittent pressure guiding can effectively reduce the exhaust pressure introduced into the back pressure chamber and reduce the wear between the moving scroll disk and the stationary scroll disk.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a scroll compressor and an air conditioner using the same. Background Art

[0002] As is well known, when a carbon dioxide scroll compressor compresses the refrigerant in the pump body, a large axial gas force will be generated to push the moving disk and the static disk apart, resulting in an increase in the pump body gap, causing leakage, and in severe cases, it is impossible to establish a normal pressure difference. Most of the existing technologies adopt a back pressure chamber on the back of the moving disk to form a back pressure to balance the axial gas force. However, how to design the back pressure of the back pressure chamber to ensure balance with the axial gas force is still a difficult point in the industry.

[0003] As Figure 1 shown, the patent with the patent number 2022108547976 discloses a back pressure pressure guiding and regulating structure. This solution throttles and reduces the pressure of the exhaust pressure in the exhaust chamber 1' through a throttling device 3', and then introduces the reduced pressure into the back pressure chamber 2', so that the back pressure chamber 2' has sufficient back pressure. This solution has at least the following deficiencies: Although the exhaust pressure is throttled and reduced before being introduced into the back pressure chamber 2', the pressure reduction is still large. After the reduced pressure is introduced into the back pressure chamber 2', the back pressure is too large, and the excessive back pressure pushes the moving scroll disk 4' towards the static scroll disk 5', increasing the wear between the moving scroll disk 4' and the static scroll disk 5'. Of course, the throttling device 3' can also be improved by extending the length of the throttling channel on the throttling device 3' to enhance the throttling and pressure reduction effect. However, this will inevitably increase the volume of the throttling device 3'. For a scroll compressor, the internal space is limited, and it is difficult to install a throttling device 3' with a large volume. Therefore, it is urgent to solve this situation. Summary of the Invention

[0004] In view of this, the present invention provides a scroll compressor and an air conditioner using the same. The main technical problem to be solved is: how to reduce the exhaust pressure introduced into the back pressure chamber to reduce the wear between the moving scroll disk and the static scroll disk.

[0005] To achieve the above object, the present invention mainly provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a scroll compressor, including a moving scroll disk, a static scroll disk, a back pressure chamber, and an exhaust passage. The exhaust passage is used for discharging the compressed fluid between the moving scroll disk and the static scroll disk.

[0007] The scroll compressor further includes a pressure guiding passage and a pressure reducing structure. The pressure guiding passage is used for introducing the exhaust pressure of the exhaust passage into the pressure reducing structure for pressure reduction treatment to obtain a reduced pressure, and intermittently introducing the reduced pressure into the back pressure chamber.

[0008] In some embodiments, the pressure guiding channel includes a first pressure guiding section and a second pressure guiding section. The pressure reducing structure is configured to be disposed on the first pressure guiding section. The pressure guiding channel introduces the exhaust pressure into the pressure reducing structure through the inlet of the first pressure guiding section and leads out the reduced pressure through the outlet of the first pressure guiding section.

[0009] The second pressure guiding section is disposed on the moving scroll disk. The outlet of the second pressure guiding section communicates with the back pressure chamber. The inlet of the second pressure guiding section is configured to intermittently face the outlet of the first pressure guiding section during the movement driven by the moving scroll disk, so as to intermittently introduce the reduced pressure into the back pressure chamber.

[0010] In some embodiments, the scroll compressor further includes a bracket for supporting the moving scroll disk.

[0011] The first pressure guiding section has a bracket pressure guiding section and a stationary scroll disk pressure guiding section. The bracket pressure guiding section is disposed on the bracket, and the stationary scroll disk pressure guiding section is disposed on the stationary scroll disk.

[0012] The inlet of the stationary scroll disk pressure guiding section serves as the inlet of the first pressure guiding section. The outlet of the stationary scroll disk pressure guiding section communicates with the inlet of the bracket pressure guiding section. The outlet of the bracket pressure guiding section serves as the outlet of the first pressure guiding section.

[0013] Wherein, the pressure reducing structure is configured to be disposed on the bracket pressure guiding section or the stationary scroll disk pressure guiding section.

[0014] In some embodiments, when the pressure reducing structure is disposed on the stationary scroll disk pressure guiding section, the bracket pressure guiding section is a groove disposed on the end face of the bracket close to the stationary scroll disk. The opening of the groove serves as both the inlet and the outlet of the bracket pressure guiding section.

[0015] In some embodiments, a wear-resistant sheet is provided on one side of the bracket close to the stationary scroll disk. The wear-resistant sheet is provided with a first through hole and a second through hole. The outlet of the stationary scroll disk pressure guiding section communicates with the inlet of the bracket pressure guiding section through the first through hole. The outlet of the bracket pressure guiding section intermittently faces the inlet of the second pressure guiding section through the second through hole.

[0016] In some embodiments, the scroll compressor further includes a filtering structure for filtering the fluid flowing into the pressure reducing structure.

[0017] In some embodiments, the filtering structure includes a mounting seat and a filter screen. The mounting seat is provided with a flow through hole for the fluid to pass through. The filter screen is mounted on the mounting seat and covers the flow through hole.

[0018] Among them, the filtering structure is fixedly embedded in the pressure guiding channel through the mounting seat. The filtering structure is located on the upstream side of the pressure reducing structure, and the filtering structure filters the fluid flowing into the pressure reducing structure through the filter screen.

[0019] In some embodiments, the pressure reducing structure includes a first throttling member to perform pressure reduction processing on the introduced pressure through the first throttling member; a first throttling groove is provided on the first throttling member. The first throttling member is used to be installed in the pressure guiding channel, and the first throttling member is in sealing cooperation with the pressure guiding channel, so that the spaces on both sides of the first throttling member inside the pressure guiding channel are communicated through the first throttling groove.

[0020] In some embodiments, the scroll compressor further includes a pressure relief structure. The pressure relief structure includes a second throttling member and a pressure relief channel communicated with the back pressure chamber. The pressure relief structure relieves the pressure of the back pressure chamber through the second throttling member; a second throttling groove is provided on the second throttling member. The second throttling member is used to be installed in the pressure relief channel, and the second throttling member is in sealing cooperation with the pressure relief channel, so that the spaces on both sides of the second throttling member inside the pressure relief channel are communicated through the second throttling groove.

[0021] In some embodiments, the exhaust channel includes an exhaust chamber communicated with the static disk exhaust port on the static scroll disk, and the exhaust channel is communicated with the pressure guiding channel through the exhaust chamber.

[0022] In a second aspect, an embodiment of the present invention further provides an air conditioner, which may include the scroll compressor of any one of the above.

[0023] By means of the above technical solutions, the scroll compressor of the present invention and the air conditioner applying the same have at least the following beneficial effects:

[0024] 1. By setting a pressure reducing structure to perform primary pressure reduction on the exhaust pressure, and then intermittently introducing the reduced pressure into the back pressure chamber, the effect of secondary pressure reduction can be achieved. The cooperation of the pressure reducing structure and the intermittent pressure guiding can effectively reduce the exhaust pressure introduced into the back pressure chamber and reduce the wear between the moving scroll disk and the static scroll disk;

[0025] 2. By setting an intermittent communication channel on the moving scroll disk for pressure reduction, it can be achieved only by opening holes on the moving scroll disk. The intermittent communication of the channel is realized by using the movement of the moving scroll disk itself without the need to additionally set other components, thus having the advantage of saving space.

[0026] The above description is only an overview of the technical solutions of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the description, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0028] Figure 1 is a cross-sectional view of a scroll compressor in the prior art;

[0029] Figure 2 is a cross-sectional view of a scroll compressor provided by an embodiment of the present invention;

[0030] Figure 3 is Figure 2 an enlarged view of part A in

[0031] Figure 4 is a cross-sectional view of another scroll compressor provided by an embodiment of the present invention;

[0032] Figure 5 is Figure 4 an enlarged view of part B in

[0033] Figure 6 is a schematic structural diagram of a first throttling member provided by an embodiment of the present invention;

[0034] Figure 7 is a schematic structural diagram of another first throttling member provided by an embodiment of the present invention;

[0035] Figure 8 is Figure 7 a top view of the first throttling member in

[0036] Figure 9 is a schematic structural diagram of a second throttling member provided by an embodiment of the present invention;

[0037] Figure 10 is Figure 9 a top view of the second throttling member in

[0038] Figure 11 is a schematic diagram of a filtering structure provided by an embodiment of the present invention.

[0039] Reference numerals: 1, oil pipe; 2, discharge port; 3, seal; 4, moving scroll disk; 5, bracket; 6, housing; 7, crankshaft; 8, stator; 9, rotor; 10, suction port; 11, static disk exhaust port; 12, static scroll disk; 13, exhaust cavity; 14, exhaust cavity discharge hole; 15, oil separation and oil storage cavity; 16, back pressure cavity; 17, first pressure guiding section; 18, second pressure guiding section; 19, pressure relief passage; 20, first throttling member; 21, filtering structure; 22, second throttling member; 23, cover body; 24, suction cavity; 25, wear-resistant sheet; 171, bracket pressure guiding section; 172, static scroll disk pressure guiding section; 173, inlet of the first pressure guiding section; 174, outlet of the first pressure guiding section; 181, inlet of the second pressure guiding section; 182, outlet of the second pressure guiding section; 201, first throttling groove; 202, first cross through groove; 221, second throttling groove; 222, second cross through groove; 211, mounting seat; 212, filter screen; 210, flow through hole; 251, first through hole; 252, second through hole. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] As Figure 2As shown, a scroll compressor proposed in one embodiment of the present invention includes a housing 6, a movable scroll 4, a fixed scroll 12, a back pressure chamber 16 and an exhaust passage. The movable scroll 4 and the fixed scroll 12 are both arranged in the housing 6. The back pressure chamber 16 is used to be arranged on the side of the movable scroll 4 away from the fixed scroll 12, and the movable scroll 4 is pushed toward the fixed scroll 12 side by the internal back pressure. The exhaust passage is used to discharge the compressed fluid between the movable scroll 4 and the fixed scroll 12.

[0044] The aforementioned scroll compressor also includes a pressure-introducing channel and a pressure-reducing structure. The pressure-introducing channel is used to introduce the exhaust pressure of the exhaust channel into the pressure-reducing structure for pressure reduction treatment to obtain pressure reduction, and the pressure reduction is intermittently introduced into the back pressure chamber 16. It should be noted here that the "pressure reduction" here refers to the fluid after the pressure reduction treatment by the pressure reduction structure, and the fluid is generally a gaseous refrigerant.

[0045] Among them, the pressure source of the back pressure chamber 16 of the scroll compressor of the present invention is provided by the exhaust channel, so that the back pressure chamber 16 can obtain a higher back pressure, which can adapt to the high-pressure operating conditions of the scroll compressor with high exhaust pressure, such as the carbon dioxide refrigerant compressor, so that the scroll compressor has a wider range of application conditions.

[0046] In addition, since the pressure reduction after the pressure reduction treatment by the pressure reduction structure is intermittently introduced into the back pressure chamber 16, the main reason for such design is that when the exhaust pressure of the exhaust passage is too large, the pressure reduction of the exhaust pressure after the pressure reduction treatment by the pressure reduction structure is still large. At this time, if the excessive pressure reduction is directly introduced into the back pressure chamber 16, the back pressure will increase instantly and cannot be released in time, resulting in excessive back pressure, causing wear between the movable scroll 4 and the fixed scroll 12. In this example, by setting a pressure reduction structure to reduce the exhaust pressure in one stage, and then by intermittently introducing the pressure reduction into the back pressure chamber 16, the effect of two-stage pressure reduction can be achieved. In this way, the pressure reduction structure and the intermittent pressure introduction can cooperate to effectively reduce the exhaust pressure introduced into the back pressure chamber 16 and reduce the wear between the movable scroll 4 and the fixed scroll 12.

[0047] In order to realize the function of the pressure-introducing channel to intermittently introduce the pressure reduction into the back pressure chamber 16, as shown in FIG. Figure 2 As shown, the aforementioned pressure-introducing channel may include a first pressure-introducing section 17 and a second pressure-introducing section 18. The aforementioned pressure-reducing structure is used to be arranged on the first pressure-introducing section 17, for example, installed inside the first pressure-introducing section 17. The inlet 173 of the first pressure-introducing section is connected to the aforementioned exhaust channel, and the pressure-introducing channel introduces the exhaust pressure of the exhaust channel into the pressure-reducing structure through the inlet 173 of the first pressure-introducing section. The pressure-introducing channel also leads out the reduced pressure after the pressure reduction treatment by the pressure-reducing structure through the outlet 174 of the first pressure-introducing section. Specifically, the pressure-reducing structure can reduce the pressure of the exhaust gas flowing through the first pressure-introducing section 17, and discharge the reduced pressure through the outlet 174 of the first pressure-introducing section.

[0048] likeFigure 2 As shown, the above-mentioned second pressure guiding section 18 is arranged on the moving scroll disk 4, and the second pressure guiding section 18 can move together with the moving scroll disk 4. The outflow port 182 of the second pressure guiding section is kept in communication with the back pressure chamber 16. The inflow port 181 of the second pressure guiding section is used to intermittently face the outflow port 174 of the first pressure guiding section during the movement driven by the moving scroll disk 4, so as to introduce the pressure reduction into the back pressure chamber 16 intermittently. Wherein, when the inflow port 181 of the second pressure guiding section faces the outflow port 174 of the first pressure guiding section, the inflow port 181 of the second pressure guiding section is in communication with the outflow port 174 of the first pressure guiding section.

[0049] In the above example, the first pressure guiding section 17 is a fixed section, the second pressure guiding section 18 is a movable section, and the second pressure guiding section 18 is kept in communication with the back pressure chamber 16. When the second pressure guiding section 18 moves driven by the moving scroll disk 4, it can be intermittently in communication with the first pressure guiding section 17, so that the pressure reduction of the first pressure guiding section 17 can be introduced into the back pressure chamber 16 intermittently.

[0050] Among them, the second pressure guiding section 18 is an intermittent communication channel. When the moving scroll disk 4 revolves around the stationary scroll disk 12 within a preset angle range, the second pressure guiding section 18 is in communication with the first pressure guiding section 17; when the moving scroll disk 4 revolves to other angles, the second pressure guiding section 18 is not in communication with the first pressure guiding section 17. This intermittent communication channel cooperates with the aforementioned pressure reduction structure to effectively reduce the exhaust pressure, so that the back pressure chamber 16 can obtain a relatively appropriate back pressure and prevent excessive back pressure from increasing the wear between the moving scroll disk and the stationary scroll disk.

[0051] In addition, by setting an intermittent communication channel on the moving scroll disk 4 for pressure reduction, it can be achieved only by opening holes on the moving scroll disk 4. The intermittent communication of the channel is realized by using the movement of the moving scroll disk 4 itself, without the need to additionally set other components, thus having the advantage of saving space. Especially for a scroll compressor, the space inside it is limited. If only the pressure reduction structure is improved to achieve a stronger pressure reduction effect, the volume of the pressure reduction structure will inevitably increase, and a larger volume of the pressure reduction structure is difficult to install due to the limitation of the internal space of the scroll compressor. In this example, only by opening holes on the moving scroll disk 4 and using the rotation of the moving scroll disk 4 itself to realize the intermittent communication of the channel can the purpose of further pressure reduction be achieved. In this way, on the one hand, the back pressure chamber 16 can obtain an appropriate back pressure to prevent excessive back pressure from increasing the wear between the moving scroll disk 4 and the stationary scroll disk 12; on the other hand, it does not occupy space and is convenient for the transformation of the existing scroll compressor.

[0052] Such as Figure 2 and Figure 3As shown, the aforementioned scroll compressor further includes a bracket 5, which is used to be installed in the housing 6 and provide support for the moving scroll disk 4. A back pressure chamber 16 as described above is formed between the bracket 5 and the moving scroll disk 4. The aforementioned stationary scroll disk 12 is used to be fixed on the bracket 5. In a specific application example, the aforementioned first pressure guiding section 17 has a bracket pressure guiding section 171 and a stationary scroll disk pressure guiding section 172. The bracket pressure guiding section 171 is arranged on the bracket 5, and the stationary scroll disk pressure guiding section 172 is arranged on the stationary scroll disk 12. Among them, the inlet of the stationary scroll disk pressure guiding section 172 serves as the inlet 173 of the aforementioned first pressure guiding section, the outlet of the stationary scroll disk pressure guiding section 172 is communicated with the inlet of the bracket pressure guiding section 171, and the outlet of the bracket pressure guiding section 171 serves as the outlet 174 of the first pressure guiding section. The aforementioned pressure reducing structure is used to be arranged on the bracket pressure guiding section 171 or the stationary scroll disk pressure guiding section 172. Among them, Figure 2 and Figure 3 FIG. Figure 2 shows a schematic diagram of a pressure reducing structure arranged on the bracket pressure guiding section 171; Figure 4 and Figure 5 FIG. Figure 4 shows a schematic diagram of a pressure reducing structure arranged on the stationary scroll disk pressure guiding section 172.

[0053] In the above example, by arranging the bracket pressure guiding section 171 on the bracket 5 and the stationary scroll disk pressure guiding section 172 on the stationary scroll disk 12, the cooperation of the bracket pressure guiding section 171 and the stationary scroll disk pressure guiding section 172 can realize the function of the aforementioned first pressure guiding section 17, so that the first pressure guiding section 17 can introduce the exhaust pressure into the pressure reducing structure through the inlet 173 for pressure reduction processing, and lead out the pressure reduction from the outlet 174.

[0054] As Figure 4 and Figure 5 shown, when the pressure reducing structure is arranged on the stationary scroll disk pressure guiding section 172, the aforementioned bracket pressure guiding section 171 can be a groove arranged on the end face of the bracket 5 close to the stationary scroll disk 12, and the opening of the groove serves as both the inlet and the outlet of the bracket pressure guiding section 171.

[0055] Compared with opening holes inside the bracket 5, in the above example, by opening a groove on the end face of the bracket 5, it is easier to process.

[0056] As Figure 3 shown, a wear-resistant sheet 25 is arranged on one side of the bracket 5 close to the stationary scroll disk 12. The wear-resistant sheet 25 is provided with a first through hole 251 and a second through hole 252. The outlet of the stationary scroll disk pressure guiding section 172 is communicated with the inlet of the bracket pressure guiding section 171 through the first through hole 251. The outlet of the bracket pressure guiding section 171 is intermittently opposite to the inlet 181 of the second pressure guiding section 18 through the second through hole 252.

[0057] In the above example, the wear-resistant piece 25 can reduce the wear between the bracket 5 and the moving scroll disk 4.

[0058] As Figure 2 shown, the aforementioned scroll compressor further includes a filtering structure 21, and the filtering structure 21 is used to filter the fluid flowing into the pressure-reducing structure. The filtering structure 21 can filter impurities to prevent impurities from entering the pressure-reducing structure and causing blockage. Among them, as Figure 11 shown, the filtering structure 21 can include a mounting seat 211 and a filter net 212. The mounting seat 211 is provided with a fluid passage hole 210 for the fluid to pass through, and the filter net 212 is installed on the mounting seat 211. The filter net 212 is used to filter the fluid flowing through the fluid passage hole 210. Among them, the filtering structure 21 is fixedly embedded in the pressure guiding channel through the mounting seat 211. The filtering structure 21 is located on the upstream side of the pressure-reducing structure, and the filtering structure 21 filters the fluid flowing into the pressure-reducing structure through the filter net 212.

[0059] To achieve the function of the aforementioned pressure-reducing structure, as Figure 6 shown, the pressure-reducing structure can include a first throttling member 20 to reduce the pressure of the introduced pressure through the first throttling member 20. The first throttling member 20 is provided with a first throttling groove 201. As Figure 2 shown, the first throttling member 20 is used to be installed in the pressure guiding channel, such as fixedly embedded in the pressure guiding channel. The first throttling member 20 is in sealing cooperation with the pressure guiding channel, so that the spaces on both sides of the first throttling member 20 inside the pressure guiding channel are communicated through the first throttling groove 201. Among them, the first throttling member 20 and the inner wall of the pressure guiding channel can be in transitional fit or interference fit to achieve the seal between the two through the transitional fit or interference fit.

[0060] In the above example, the first throttling member 20 can reduce the pressure of the introduced pressure through the first throttling groove 201, thereby realizing the function of the pressure-reducing structure.

[0061] It should be noted here that: the above-mentioned first throttling member 20 can be installed at the corresponding position of the pressure guiding channel according to the actual situation, such as installed in the bracket pressure guiding section 171 or the stationary scroll disk pressure guiding section 172 of the pressure guiding channel. As Figure 2 shown, when the first throttling member 20 is installed in the bracket pressure guiding section 171 of the pressure guiding channel, the first throttling member 20 is in sealing cooperation with the inner wall of the bracket pressure guiding section 171, so that the spaces on both sides of the first throttling member 20 inside the bracket pressure guiding section 171 are communicated through the first throttling groove 201. As Figure 5 shown, when the first throttling member 20 is installed in the stationary scroll disk pressure guiding section 172 of the pressure guiding channel, the first throttling member 20 is in sealing cooperation with the inner wall of the stationary scroll disk pressure guiding section 172, so that the spaces on both sides of the first throttling member 20 inside the stationary scroll disk pressure guiding section 172 are communicated through the first throttling groove 201.

[0062] In a specific application example, such as Figure 6 As shown, the aforementioned first throttle chute 201 can be arranged on the outer wall of the first throttle member 20 for convenient processing. The first throttle member 20 can be a cylindrical pin, and the first throttle chute 201 can be a spiral chute. Among them, by setting the first throttle chute 201 in a spiral shape, the length of the first throttle chute 201 can be extended to improve the throttling and pressure reduction effect of the first throttle member 20. In addition, by reasonably designing the relevant dimensional parameters of the first throttle member 20, such as the pitch, the equivalent diameter of the spiral chute, the equivalent length of the spiral passage, and the diameter and length of the cylindrical pin, etc., the required throttling pressure drop value can be obtained.

[0063] Such as Figure 7 And Figure 8 As shown, a first cross chute 202 can also be provided at the end of the aforementioned first throttle member 20 to facilitate screwing the first throttle member 20 into the pressure guiding channel through a tool such as a screwdriver.

[0064] The aforementioned scroll compressor further includes a pressure relief structure for relieving pressure from the back pressure chamber 16. To achieve the function of the aforementioned pressure relief structure, in a specific application example, such as Figure 2 As shown, the pressure relief structure can include a second throttle member 22 and a pressure relief channel 19. The pressure relief structure relieves pressure from the back pressure chamber 16 through the second throttle member 22. The pressure relief channel 19 is used to communicate with the back pressure chamber 16. The pressure relief channel 19 can be arranged on the aforementioned bracket 5. The second throttle member 22 is used to be installed in the pressure relief channel 19, such as being fixedly embedded in the pressure relief channel 19. Such as Figure 9 As shown, a second throttle chute 221 is provided on the second throttle member 22. The second throttle member 22 is in sealing cooperation with the pressure relief channel 19, so that the spaces on both sides of the second throttle member 22 inside the pressure relief channel 19 are communicated through the second throttle chute 221.

[0065] In the above example, the second throttle member 22 can continuously relieve pressure from the back pressure chamber 16 through the second throttle chute 221 to achieve the function of the aforementioned pressure relief structure, so that the back pressure can be stabilized within a reasonable range and an appropriate back pressure can be obtained. In addition, by relieving pressure through the second throttle member 22, the back pressure can be relieved smoothly, ensuring that the back pressure fluctuation is small and the compressor can operate stably and normally.

[0066] Such as Figure 10 As shown, a second cross chute 222 can also be provided at the end of the aforementioned second throttle member 22 to facilitate screwing the second throttle member 22 into the pressure guiding channel through a tool such as a screwdriver.

[0067] To facilitate the introduction of the exhaust pressure of the exhaust passage into the pressure guiding channel, in a specific application example, such as Figure 2As shown in the figure, the scroll compressor includes a cover body 23. The cover body 23 covers one end of the outer shell 6 and forms an exhaust cavity 13 with the stationary scroll plate 12. The aforementioned exhaust passage may include this exhaust cavity 13, and the exhaust cavity 13 is communicated with the stationary plate exhaust port 11 on the stationary scroll plate 12. The exhaust passage is communicated with the pressure guiding passage through this exhaust cavity 13. Among them, when the pressure guiding passage includes a first pressure guiding section 17, the pressure guiding passage is communicated with the exhaust cavity 13 through the inlet 173 of the first pressure guiding section.

[0068] It should be noted here that: the aforementioned bracket 5 is fixed in the middle of the outer shell 6. An air suction cavity 24 is formed between the bracket 5 and the bottom of the outer shell 6. This air suction cavity 24 is a low-pressure cavity. The aforementioned pressure relief structure is used to discharge the fluid in the back pressure cavity 16 to the air suction cavity 24.

[0069] As Figure 2 As shown in the figure, the aforementioned scroll compressor further includes a stator 8, a rotor 9 and a crankshaft 7. The stator 8 is fixed inside the outer shell 6, and the rotor 9 is sleeved on the crankshaft 7. The crankshaft 7 is rotationally matched with the bracket 5 through a bearing. The crankshaft 7 is also connected to the moving scroll plate 4. The crankshaft 7 is used to drive the moving scroll plate 4 to make a reciprocating rotary motion around the stationary scroll plate 12. An air suction port 10 communicated with the air suction cavity 24 is provided at the bottom of the outer shell 6. A seal 3 is further provided between the stationary scroll plate 12 and the cover body 23. A stationary plate exhaust port 11 is provided on the stationary scroll plate 12. The stationary plate exhaust port 11 is communicated with the exhaust cavity 13. An exhaust cavity discharge hole 14 communicated with the exhaust cavity 13 is provided on the cover body 23. An oil separation and oil storage cavity 15 is further provided on the cover body 23. An oil distribution pipe 1 is provided in the oil separation and oil storage cavity 15, and the oil separation and oil storage cavity 15 has a discharge port 2.

[0070] An embodiment of the present invention further proposes an air conditioner, which may include any one of the above scroll compressors. Due to the adoption of the above scroll compressor in the air conditioner, compared with the prior art in which the pressure source of the back pressure cavity 16 is provided by the compression cavity, the pressure source of the back pressure cavity 16 of the scroll compressor of the present invention is provided by the exhaust passage, and the exhaust pressure of the exhaust passage is greater than the medium pressure in the compression cavity, so that the back pressure cavity 16 can obtain a higher back pressure, and it can adapt to the high-pressure operating conditions of scroll compressors with high exhaust pressure, such as carbon dioxide refrigerant compressors, so that the scroll compressor has a wider application operating condition range.

[0071] The working principle and preferred embodiments of the present invention will be introduced below.

[0072] The present invention relates to the design of a scroll compressor and an air conditioner using the same. The scroll compressor has a back pressure chamber 16, and the back pressure chamber 16 is intermittently communicated with the exhaust chamber 13, so that the pressure source of the back pressure chamber 16 is provided by the exhaust chamber 13. When the orbiting scroll 4 orbits around the fixed scroll 12 to a set angular range position, the back pressure chamber 16 is only communicated with the exhaust chamber 13. When the orbiting scroll 4 orbits around the fixed scroll 12 to other angular positions, the back pressure chamber 16 and the exhaust chamber 13 are not communicated, which is a structure of intermittent pressure supply. Through the design of intermittent communication, the back pressure chamber 16 can obtain an appropriate back pressure. Among them, the present invention also sets a first throttling device on the pressure guiding channels of the back pressure chamber 16 and the exhaust chamber 13. The first throttling device can have a spiral first throttling groove 201, which can reduce the introduced exhaust pressure to obtain an initial pressure drop effect. Coupled with the intermittent communication state of the back pressure chamber 16 and the exhaust chamber 13, it is possible to reasonably and intermittently provide back pressure for the back pressure chamber 16. And then a second throttling device is set between the back pressure chamber 16 and the low-pressure chamber for pressure relief. The second throttling device can have a spiral second throttling groove 221, so that the back pressure can be stabilized within a reasonable range, and an appropriate back pressure can be obtained, so as not to cause the back pressure to increase instantaneously due to excessive exhaust pressure, resulting in excessive back pressure and causing problems such as wear of the moving and static disks.

[0073] The present invention solves the following technical problems:

[0074] 1. The present invention designs an intermittent pressure guiding channel in which the pressure source of the back pressure chamber 16 is provided by the exhaust chamber 13. By setting a first throttling device on the channels of the back pressure chamber 16 and the exhaust chamber 13, the first throttling device can have a spiral first throttling groove 201, so that the pressure source obtains an initial pressure drop effect. Coupled with the intermittent communication state of the back pressure chamber 16 and the exhaust chamber 13, and then a second throttling device is set between the back pressure chamber 16 and the low-pressure chamber for pressure relief. The second throttling device can have a spiral second throttling groove 221, so that the back pressure can be stabilized within a reasonable range, and an appropriate back pressure can be obtained, so as not to cause the back pressure to increase instantaneously due to excessive exhaust pressure and be unable to relieve pressure in time, resulting in excessive back pressure and causing problems such as wear of the moving and static disks.

[0075] 2. The technical solution of the present invention can solve the problem that when the back pressure is too high, it can gradually relieve pressure, so that the back pressure is relatively stable, and there will be no sudden pressure relief like that of a check valve, resulting in unstable back pressure.

[0076] 3. In the technical solution of the present invention, the pressure source of the back pressure chamber 16 is provided by the exhaust chamber 13, and a relatively large back pressure value can be obtained, which can adapt to the high-pressure operating conditions of a carbon dioxide refrigerant compressor with high exhaust pressure.

[0077] Advantages of the present invention: The technical solution of the present invention enables the carbon dioxide scroll compressor to operate under high-pressure conditions, can improve the adaptability range of the operating conditions of the carbon dioxide scroll compressor, can adjust the back pressure to make the compressor operate more stably, improve the reliability of the compressor, and enhance the product competitiveness.

[0078] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present invention.

Claims

1. A scroll compressor, comprising a moving scroll disk (4), a stationary scroll disk (12), a back pressure chamber (16) and an exhaust passage, the exhaust passage being configured to allow the compressed fluid between the moving scroll disk (4) and the stationary scroll disk (12) to be discharged; characterized in that, the scroll compressor further comprises a pressure guiding passage and a pressure reducing structure, the pressure guiding passage being configured to introduce the exhaust pressure of the exhaust passage into the pressure reducing structure for pressure reduction processing to obtain a reduced pressure, and intermittently introducing the reduced pressure into the back pressure chamber (16); the pressure guiding passage includes a first pressure guiding section (17) and a second pressure guiding section (18), the pressure reducing structure being configured to be disposed on the first pressure guiding section (17), the pressure guiding passage introducing the exhaust pressure into the pressure reducing structure through the inlet port (173) of the first pressure guiding section and leading out the reduced pressure through the outlet port (174) of the first pressure guiding section; the second pressure guiding section (18) is disposed on the moving scroll disk (4), the outlet port (182) of the second pressure guiding section being in communication with the back pressure chamber (16), the inlet port (181) of the second pressure guiding section being configured to be intermittently opposite to the outlet port (174) of the first pressure guiding section during the movement driven by the moving scroll disk (4) so as to intermittently introduce the reduced pressure into the back pressure chamber (16); the scroll compressor further comprises a bracket (5) for supporting the moving scroll disk (4); the first pressure guiding section (17) has a bracket pressure guiding section (171) and a stationary scroll disk pressure guiding section (172), the bracket pressure guiding section (171) being disposed on the bracket (5), and the stationary scroll disk pressure guiding section (172) being disposed on the stationary scroll disk (12); a wear-resistant sheet is provided on one side of the bracket (5) close to the stationary scroll disk (12), the wear-resistant sheet being provided with a first through hole and a second through hole, the outlet port of the stationary scroll disk pressure guiding section (172) being in communication with the inlet port of the bracket pressure guiding section (171) through the first through hole; the outlet port of the bracket pressure guiding section (171) is intermittently opposite to the inlet port (181) of the second pressure guiding section (18) through the second through hole.

2. The scroll compressor according to claim 1, characterized in that, the inlet port of the stationary scroll disk pressure guiding section (172) serves as the inlet port (173) of the first pressure guiding section, the outlet port of the stationary scroll disk pressure guiding section (172) is in communication with the inlet port of the bracket pressure guiding section (171), and the outlet port of the bracket pressure guiding section (171) serves as the outlet port (174) of the first pressure guiding section; wherein, the pressure reducing structure is configured to be disposed on the bracket pressure guiding section (171) or the stationary scroll disk pressure guiding section (172).

3. The scroll compressor according to claim 2, characterized in that, when the pressure reducing structure is disposed on the stationary scroll disk pressure guiding section (172), the bracket pressure guiding section (171) is a groove provided on the end face of the bracket (5) on the side close to the stationary scroll disk (12), and the opening of the groove serves as both the inlet port and the outlet port of the bracket pressure guiding section (171).

4. The scroll compressor according to any one of claims 1 to 3, characterized in that, It further comprises a filtering structure (21), the filtering structure (21) being configured to filter the fluid flowing into the pressure reducing structure.

5. The scroll compressor according to claim 4, wherein the filtering structure (21) includes a mounting base (211) and a filter screen (212), and the mounting base (211) is provided with a fluid passage hole (210) for fluid to pass through; the filter screen (212) is mounted on the mounting base (211) and covers the fluid passage hole (210); wherein, the filtering structure (21) is fixedly embedded in the pressure guiding passage through the mounting base (211), the filtering structure (21) is located on the upstream side of the pressure reducing structure, and the filtering structure (21) filters the fluid flowing into the pressure reducing structure through the filter screen (212).

6. The scroll compressor according to any one of claims 1 to 3 and 5, wherein the pressure reducing structure includes a first throttling member (20) for reducing the pressure of the introduced pressure through the first throttling member (20); the first throttling member (20) is provided with a first throttling groove (201), the first throttling member (20) is used for being mounted in the pressure guiding passage, and the first throttling member (20) is in sealing cooperation with the pressure guiding passage, so that the spaces on both sides of the first throttling member (20) inside the pressure guiding passage are communicated through the first throttling groove (201).

7. The scroll compressor according to any one of claims 1 to 3 and 5, characterized in that, It further includes a pressure relief structure, the pressure relief structure includes a second throttling member (22) and a pressure relief passage (19) communicated with the back pressure chamber (16), and the pressure relief structure relieves the pressure of the back pressure chamber (16) through the second throttling member (22); the second throttling member (22) is provided with a second throttling groove (221), the second throttling member (22) is used for being mounted in the pressure relief passage (19), and the second throttling member (22) is in sealing cooperation with the pressure relief passage (19), so that the spaces on both sides of the second throttling member (22) inside the pressure relief passage (19) are communicated through the second throttling groove (221).

8. The scroll compressor according to any one of claims 1 to 3 and 5, wherein the exhaust passage includes an exhaust chamber (13) communicated with a static disk exhaust port (11) on the static scroll disk (12), and the exhaust passage is communicated with the pressure guiding passage through the exhaust chamber (13).

9. An air conditioner, characterized in that, A scroll compressor including any one of claims 1 to 8.

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