Scroll compressor and heat pump system

Abstract

The invention discloses a scroll compressor and a heat pump system. The scroll compressor comprises a machine shell, an exhaust pipe, a heat exchanger, a heat exchanger and a heat exchanger, the compression assembly is arranged in the machine shell, the compression assembly comprises a movable scroll plate and a static scroll plate, the movable scroll plate and the static scroll plate are meshed with each other and define a compression cavity, the static scroll plate is provided with a first exhaust hole and a second exhaust hole which are communicated with the compression cavity, and the first exhaust hole and the second exhaust hole are communicated with the compression cavity. The pressure of gas exhausted from the first exhaust hole is greater than that of gas exhausted from the second exhaust hole; a middle exhaust passage for communicating the second exhaust hole with the exhaust pipe is also arranged in the plate body of the static scroll plate, the middle exhaust passage at least comprises a first section, and the extension direction of the first section is different from that of the second exhaust hole. According to the technical scheme, the double-exhaust function of the scroll compressor can be achieved, and meanwhile the oil spitting rate of the scroll compressor can be reduced.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a scroll compressor and a heat pump system. Background Technology

[0002] Dual-exhaust heat pump systems can significantly improve system heating efficiency, but using two compressors to implement a dual-exhaust heat pump system will greatly increase the system cost, size and weight. However, using a dual-exhaust scroll compressor can solve the above problems well.

[0003] In related technologies, dual-exhaust scroll compressors typically have a first exhaust port and a second exhaust port on the stationary scroll plate. The first exhaust port is used for high-pressure exhaust, and the second exhaust port is used for medium-pressure exhaust. In traditional scroll compressors, the second exhaust port is directly connected to the exhaust pipe, causing the refrigerant gas discharged through the second exhaust port to be discharged directly without oil separation. This results in a high oil discharge rate, and the outflow of lubricating oil can damage the heat exchanger performance of the heat pump system, as well as cause problems such as oil shortage and wear in the compressor. Summary of the Invention

[0004] The main objective of this invention is to propose a scroll compressor that achieves dual exhaust function while reducing the oil discharge rate of the scroll compressor.

[0005] To achieve the above objectives, the present invention provides a scroll compressor comprising:

[0006] A housing, wherein an exhaust pipe is provided on one side of the housing; and

[0007] A compression assembly is disposed within the housing. The compression assembly includes a moving scroll plate and a stationary scroll plate. The moving scroll plate and the stationary scroll plate mesh with each other and define a compression chamber. The stationary scroll plate has a first exhaust port and a second exhaust port that are respectively connected to the compression chamber. The gas pressure discharged from the first exhaust port is greater than the gas pressure discharged from the second exhaust port. The stationary scroll plate also has an intermediate exhaust channel that connects the second exhaust port to the exhaust pipe. The intermediate exhaust channel includes at least a first section, and the extension direction of the first section is different from the extension direction of the second exhaust port.

[0008] In one embodiment, the moving scroll plate divides the compression chamber into a first chamber and a second chamber during its movement relative to the stationary scroll plate. The first chamber is located in the central region of the stationary scroll plate, and the second chamber is located in the peripheral region of the first chamber. The first exhaust port communicates with the first chamber, and the second exhaust port communicates with the second chamber, so that the gas pressure discharged from the first exhaust port is greater than the gas pressure discharged from the second exhaust port.

[0009] In one embodiment, a first exhaust chamber is defined between the side of the stationary vortex disk away from the moving vortex disk and the housing. The first exhaust port communicates with the first exhaust chamber. An independent second exhaust chamber is provided in the first exhaust chamber. The second exhaust port communicates with the intermediate exhaust channel through the second exhaust chamber.

[0010] In one embodiment, the stationary vortex disk is provided with a sealing end cap on the side opposite to the moving vortex disk. The sealing end cap and the stationary vortex disk surround to form a second exhaust chamber. The second exhaust port has an exhaust port that penetrates the surface of the stationary vortex disk to communicate with the second exhaust chamber. The sealing end cap or the stationary vortex disk is provided with an intermediate exhaust port that communicates the second exhaust chamber with the intermediate exhaust channel.

[0011] In one embodiment, a sealing gasket is provided between the sealing end cap and the stationary vortex disk.

[0012] In one embodiment, the compression assembly further includes a check valve disposed between the second exhaust port and the second exhaust chamber, the check valve being configured to allow unidirectional flow from the second exhaust port toward the second exhaust chamber.

[0013] In one embodiment, the check valve is disposed in the second exhaust chamber. The check valve includes a valve plate and a limiter disposed on the side of the valve plate away from the exhaust port. The valve plate is used to open or close the exhaust port, and the limiter is used to limit the maximum travel of the valve plate toward the side away from the exhaust port.

[0014] In one embodiment, the stationary vortex disk is provided with an air intake port, and the moving vortex disk and the stationary vortex disk further define an air intake chamber communicating with the air intake port. The stationary vortex disk is also provided with a choke hole that communicates the second exhaust chamber with the air intake chamber.

[0015] In one embodiment, the side wall of the housing is provided with a through hole for the exhaust pipe to pass through, and the intermediate exhaust channel has a pipe interface that penetrates the circumference of the static vortex disk. The pipe interface is disposed opposite to the through hole, and the intake end of the exhaust pipe passes through the through hole and the pipe interface and is connected to the intermediate exhaust channel.

[0016] In one embodiment, the intermediate exhaust channel includes an exhaust section communicating with the second exhaust port and a connecting section communicating with the pipe interface. The inner diameter of the exhaust section is smaller than the inner diameter of the connecting section to form a limiting step at the adjacent part of the exhaust section and the connecting section. The air inlet end of the exhaust pipe is inserted into the connecting section, and the limiting step is used to limit the fit with the end face of the exhaust pipe.

[0017] In one embodiment, the exhaust pipe includes a main pipe and a connecting pipe. One end of the connecting pipe is inserted into the intermediate exhaust channel, and the other end of the connecting pipe extends out of the housing and is connected to the main pipe. The outer peripheral wall of the connecting pipe is sealed to the inner peripheral wall of the intermediate exhaust channel.

[0018] In one embodiment, the exhaust pipe further includes a liner disposed within the connecting pipe body, the liner being press-fitted with the connecting pipe body so that the outer peripheral wall of the connecting pipe body is sealed to the inner peripheral wall of the intermediate exhaust channel.

[0019] Alternatively, a sealing element may be provided between the connecting pipe and the intermediate exhaust channel to ensure a sealing fit between the outer peripheral wall of the connecting pipe and the inner peripheral wall of the intermediate exhaust channel.

[0020] The present invention proposes a heat pump system, including a scroll compressor as described above.

[0021] The technical solution of this invention includes an intermediate exhaust channel within the stationary scroll compressor. A second exhaust port is connected to an exhaust pipe via this intermediate exhaust channel. This allows the refrigerant gas discharged from the second exhaust port to be transported a certain distance through the intermediate exhaust channel before being discharged to the outside of the compressor casing through the exhaust pipe. This extends the flow path of the refrigerant gas within the stationary scroll compressor, facilitating oil-gas separation. Furthermore, the intermediate exhaust channel includes at least a first section whose extension direction differs from that of the second exhaust port. This makes the entire gas transport channel formed by the connection between the second exhaust port and the intermediate exhaust channel a non-linear channel. Consequently, the refrigerant gas is transported along a non-linear path within the stationary scroll compressor, and the change in flow direction during the exhaust process further enhances the oil-gas separation effect. This effectively reduces the oil discharge rate of the scroll compressor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the scroll compressor of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3This is a cross-sectional structural schematic diagram of another embodiment of the scroll compressor of the present invention;

[0026] Figure 4 for Figure 3 A cross-sectional schematic diagram of the compression assembly of a medium scroll compressor;

[0027] Figure 5 for Figure 3 Another cross-sectional view of the compression assembly of the scroll compressor;

[0028] Figure 6 for Figure 3 A top view of a scroll compressor after removing the top cover and sealing end cover of the casing;

[0029] Figure 7 for Figure 3 Another cross-sectional structural diagram of the medium scroll compressor.

[0030] Explanation of icon numbers:

[0031] label name label name 100 Scroll compressor 326 Cut-off orifice 10 chassis 327 Oil collection tank 101 Through hole 301 compression chamber 20 exhaust pipe 301a First chamber 21 Supervisory body 301b Second chamber 22 Connecting pipe body 302 First exhaust chamber 23 Liner 303 Second exhaust chamber 30 Compression components 304 Inspiratory chamber 31 Moving vortex disk 33 Sealed end cap 32 Static vortex disk 34 sealing gasket 321 First exhaust port 35 Check valve 322 Second exhaust port 351 Valve plate 323 Intermediate exhaust channel 352 Limiter 3231 Exhaust section 353 fastener 3232 Connecting segment 36 exhaust valve 3233 Pipe interface 40 crankshaft 3234 Limiting step 50 Mainframe 324 Center exhaust port 60 Sub-rack 325 air intake

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] In related technologies, dual-exhaust scroll compressors typically have a first exhaust port and a second exhaust port on the stationary scroll plate. The first exhaust port is used for high-pressure exhaust, and the second exhaust port is used for medium-pressure exhaust. In traditional scroll compressors, the second exhaust port is directly connected to the exhaust pipe, causing the refrigerant gas discharged through the second exhaust port to be discharged directly without oil separation. This results in a high oil discharge rate, and the outflow of lubricating oil can damage the heat exchanger performance of the heat pump system, as well as cause problems such as oil shortage and wear in the compressor.

[0037] Based on this, the present invention proposes a scroll compressor 100. By optimizing the exhaust structure of the scroll compressor 100, a dual exhaust function can be achieved, while simultaneously reducing the oil discharge rate of the scroll compressor 100. The following provides examples of embodiments of the scroll compressor 100. This scroll compressor 100 can be applied to heat pump systems, which can be used in refrigeration equipment such as air conditioners and refrigerators, as well as in water heaters and hot air blowers.

[0038] Please refer to Figure 1 and Figure 3In some embodiments of the present invention, the scroll compressor 100 includes a housing 10 and a compression assembly 30 disposed within the housing 10. An exhaust pipe 20 is provided on one side of the housing 10; the compression assembly 30 includes a moving scroll plate 31 and a stationary scroll plate 32, the moving scroll plate 31 and the stationary scroll plate 32 meshing with each other and defining a compression chamber 301; the stationary scroll plate 32 has a first exhaust port 321 and a second exhaust port 322 respectively communicating with the compression chamber 301, the gas pressure discharged from the first exhaust port 321 being greater than the gas pressure discharged from the second exhaust port 322; the stationary scroll plate 32 also has an intermediate exhaust channel 323 communicating the second exhaust port 322 with the exhaust pipe 20, the intermediate exhaust channel 323 including at least a first section, the extension direction of the first section being different from the extension direction of the second exhaust port 322.

[0039] The scroll compressor 100 includes a housing 10, and a compression assembly 30, a crankshaft 40, a main frame 50, a sub-frame 60, and a drive assembly (not shown) disposed within the housing 10. The compression assembly 30 includes a moving scroll 31 and a stationary scroll 32 that cooperate with each other. The moving scroll 31 includes a moving disk body and moving scroll teeth located on one side of the moving disk body. The stationary scroll 32 includes a stationary disk body and stationary scroll teeth located on one side of the stationary disk body. The moving scroll teeth mesh with the stationary scroll teeth. A bearing cavity connected to the eccentric portion of the crankshaft 40 is provided on the side of the moving scroll 31 opposite to the moving scroll teeth. The two ends of the crankshaft 40 are supported by the main frame 50 and the sub-frame 60, respectively. The drive assembly is drivenly connected to the crankshaft 40. When the scroll compressor 100 is working, the drive assembly (e.g., a motor) drives the crankshaft 40 to rotate. The eccentric part of the crankshaft 40 drives the moving scroll 31 to rotate eccentrically, while the stationary scroll 32 remains stationary. This allows the moving scroll teeth to move continuously relative to the stationary scroll teeth to form a compression chamber 301 with a continuously changing volume. The gas is gradually compressed in a number of crescent-shaped compression chambers 301 formed by the meshing and locking of the moving and stationary scrolls. Finally, the gas is discharged when the compression chamber 301 is connected to the exhaust port.

[0040] To enable the dual exhaust function of the scroll compressor 100, the stationary scroll plate 32 is provided with a first exhaust port 321 and a second exhaust port 322, which are respectively connected to the compression chamber 301. The gas pressure discharged from the first exhaust port 321 is greater than the gas pressure discharged from the second exhaust port 322. This is understandable, as... Figure 7As shown, during the movement of the moving scroll disk 31 relative to the stationary scroll disk 32, the compression chamber 301 can be divided into two independent chambers: a first chamber 301a and a second chamber 301b. Specifically, the first chamber 301a can be a high-pressure chamber located in the central region of the stationary scroll disk 32, and the second chamber 301b can be a medium-pressure chamber located in the peripheral region of the first chamber 301a. The first exhaust port 321 is connected to the first chamber 301a (i.e., the high-pressure chamber) to achieve high-pressure exhaust, and the second exhaust port 322 is connected to the second chamber 301b (i.e., the medium-pressure chamber) to achieve medium-pressure exhaust.

[0041] Understandably, in traditional scroll compressors, the second exhaust port is directly connected to the exhaust pipe for exhaust, which means that the refrigerant gas discharged from the second exhaust port is discharged directly without oil separation, resulting in a high oil discharge rate of the compressor. In this invention, an intermediate exhaust channel 323 is provided within the stationary scroll plate 32. The second exhaust port 322 is connected to the exhaust pipe 20 via the intermediate exhaust channel 323, allowing the refrigerant gas discharged from the second exhaust port 322 to be transported a certain distance via the intermediate exhaust channel 323 before being discharged to the outside of the casing 10 via the exhaust pipe 20. This extends the flow path of the refrigerant gas within the stationary scroll plate 32, facilitating oil-gas separation. Furthermore, the intermediate exhaust channel 323 includes at least a first section, the extension direction of which differs from that of the second exhaust port 322. This makes the entire gas transport channel formed by the connection between the second exhaust port 322 and the intermediate exhaust channel 323 a non-linear channel, causing the refrigerant gas to be transported along a non-linear path within the stationary scroll plate 32. The change in flow direction of the refrigerant gas during the exhaust process further enhances the oil-gas separation effect. This effectively reduces the oil discharge rate of the scroll compressor 100.

[0042] It is worth noting that the intermediate exhaust channel 323 can be a straight channel or a non-straight channel, as long as the extending direction of the intermediate exhaust channel 323 at least in the first segment is different from the extending direction of the second exhaust port 322. For example, the intermediate exhaust channel 323 may include an exhaust section 3231 communicating with the second exhaust port 322, and a connecting section 3232 connecting the exhaust section 3231 with the pipe interface 3233. At least one of the exhaust section 3231 and the connecting section 3232 may serve as the first segment, and have a different extending direction from the second exhaust port 322.

[0043] It is worth noting that the second exhaust port 322 and the intermediate exhaust channel 323 can be directly connected or indirectly connected. For example, as Figure 1 and Figure 2As shown, in one embodiment, the second exhaust port 322 is a blind hole extending vertically. The bottom end of the second exhaust port 322 penetrates the stationary vortex disk 32 to communicate with the second chamber 301b. The top end of the second exhaust port 322 is closed. One end of the intermediate exhaust channel 323 communicates with the top end of the second exhaust port 322, and the other end of the intermediate exhaust channel 323 extends laterally to a position suitable for connecting with the exhaust pipe 20. In this way, the refrigerant gas in the second chamber 301b is transported upward a certain distance through the second exhaust port 322 and then laterally transported along the intermediate exhaust channel 323 to the exhaust pipe 20, and finally discharged from the exhaust pipe 20.

[0044] For example, such as Figure 3 As shown, in another embodiment, the static vortex disk 32 defines a first exhaust chamber 302 between the side of the static vortex disk 32 away from the dynamic vortex disk 31 and the housing 10. The first exhaust port 321 communicates with the first exhaust chamber 302. An independent second exhaust chamber 303 is provided in the first exhaust chamber 302. The second exhaust port 322 communicates with the intermediate exhaust channel 323 through the second exhaust chamber 303.

[0045] In this embodiment, during the operation of the scroll compressor 100, the high-pressure gas in the first chamber 301a is discharged to the first exhaust chamber 302 through the first exhaust port 321, and the medium-pressure gas in the second chamber 301b is discharged to the second exhaust chamber 303 through the second exhaust port 322. The second exhaust chamber 303 and the first exhaust chamber 302 are independent of each other, which can prevent cross-contamination. During the medium-pressure exhaust process, the gas discharged from the second exhaust port 322 first enters the second exhaust chamber 303, and then is transported from the second exhaust chamber 303 to the intermediate exhaust channel 323, and finally is transported from the intermediate exhaust channel 323 to the exhaust pipe 20 for discharge. The entire gas flow path undergoes multiple changes in flow direction, which is more conducive to separating the lubricating oil mixed in the gas, achieving a better oil-gas separation effect, thereby further reducing the oil discharge rate of the scroll compressor 100.

[0046] Understandably, there are multiple ways to construct the second exhaust chamber 303. For example, an independent second exhaust chamber 303 can be constructed using the structure of the stationary scroll plate 32 itself; another example is that a sealing end cover 33 can be provided on the side of the stationary scroll plate 32 away from the moving scroll plate 31, with the sealing end cover 33 and the stationary scroll plate 32 together enclosing the second exhaust chamber 303; yet another example is that the second exhaust chamber 303 can be constructed using other components within the housing 10. Of course, the second exhaust chamber 303 can also be constructed in other ways, which are not specifically limited here.

[0047] like Figure 3 and Figure 4As shown, in one embodiment, the stationary vortex disk 32 is provided with a sealing end cap 33 on the side opposite to the moving vortex disk 31. The sealing end cap 33 and the stationary vortex disk 32 surround to form the second exhaust chamber 303. The second exhaust hole 322 has an exhaust port that penetrates the surface of the stationary vortex disk 32 to communicate with the second exhaust chamber 303. The sealing end cap 33 or the stationary vortex disk 32 is provided with an intermediate exhaust hole 324 that communicates the second exhaust chamber 303 with the intermediate exhaust channel 323.

[0048] In this embodiment, a sealing end cap 33 is provided on the side of the stationary scroll plate 32 away from the moving scroll plate 31. The sealing end cap 33 and the stationary scroll plate 32 together form a second exhaust chamber 303, which simplifies the structure of the second exhaust chamber 303 and facilitates manufacturing. The sealing end cap 33 and the stationary scroll plate 32 are connected and fixed by means including but not limited to fasteners and welding. Optionally, the sealing end cap 33 and the stationary scroll plate 32 are connected by fasteners to facilitate the disassembly and installation of the sealing end cap 33, thereby making it easier to install other structures within the second exhaust chamber 303. Specifically, the second exhaust hole 322 extends axially along the stationary scroll plate 32. The bottom end of the second exhaust hole 322 communicates with the second chamber 301b of the compression chamber 301, and the top end of the second exhaust hole 322 forms an exhaust port located within the coverage area of ​​the sealing end cap 33, allowing the second exhaust hole 322 to communicate with the second exhaust chamber 303 via the exhaust port. The second exhaust chamber 303 is connected to the intermediate exhaust channel 323 via an intermediate exhaust port 324. The intermediate exhaust port 324 can be located on the stationary vortex disk 32 or on the sealing end cap 33. For example, the intermediate exhaust port 324 is located on the stationary vortex disk 32 and extends axially along the stationary vortex disk 32, while the intermediate exhaust channel 323 extends radially along the stationary vortex disk 32. The top end of the intermediate exhaust port 324 forms an air inlet port that communicates with the second exhaust chamber 303, and the bottom end of the intermediate exhaust port 324 communicates with the intermediate exhaust channel 323. In this way, the gas in the second chamber 301b can be discharged sequentially through the second exhaust port 322, the second exhaust chamber 303, the intermediate exhaust port 324, and the intermediate exhaust channel 323 to the exhaust pipe 20, and finally discharged from the exhaust pipe 20.

[0049] To ensure the sealing reliability of the second exhaust chamber 303, further, such as Figure 4As shown, a sealing gasket 34 is provided between the sealing end cap 33 and the stationary vortex disk 32. Specifically, the sealing end cap 33 has an open end facing the stationary vortex disk 32, and the sealing gasket 34 is an annular gasket adapted to the open end of the sealing end cap 33. During assembly, the sealing gasket 34 is first placed on the top surface of the stationary vortex disk 32, then the open end of the sealing end cap 33 is pressed onto the sealing gasket 34, and then the sealing end cap 33, the sealing gasket 34, and the stationary vortex disk 32 are connected and fixed by fasteners. The sealing gasket 34 enables the sealing end cap 33 and the stationary vortex disk 32 to form a reliable sealing connection, thereby ensuring the airtightness of the second exhaust chamber 303 and preventing the second exhaust chamber 303 from leaking air with the first exhaust chamber 302.

[0050] It is understandable that during the compression cycle of the compression assembly 30, the pressure at the second exhaust port 322 of the static scroll 32 fluctuates greatly, and the second exhaust pressure of the heat pump system is also different under different operating conditions. It is easy for the pressure at the second exhaust port 322 to be lower than the second exhaust pressure of the heat pump system, which will cause the refrigerant gas to flow in reverse and result in serious energy efficiency loss.

[0051] To prevent refrigerant from flowing back, such as Figure 3 , Figure 4 and Figure 5 As shown, in one embodiment, the compression assembly 30 further includes a check valve 35 disposed between the second exhaust port 322 and the second exhaust chamber 303. The check valve 35 is configured to allow one-way flow from the second exhaust port 322 to the second exhaust chamber 303. Thus, when the exhaust pressure of the second exhaust port 322 is greater than the pressure of the second exhaust chamber 303, the check valve 35 allows one-way flow between the second exhaust port 322 and the second exhaust chamber 303, enabling exhaust to proceed from the second exhaust port 322 to the second exhaust chamber 303. When the pressure in the second exhaust chamber 303 is greater than the pressure in the second exhaust port 322, the check valve 35 is closed, isolating the second exhaust port 322 from the second exhaust chamber 303 and preventing refrigerant from flowing back into the second exhaust port 322, thereby reducing the energy efficiency loss of the second exhaust. The specific structure of the check valve 35 can vary, including but not limited to reed valves, ball valves, etc., as long as they achieve the one-way valve function; no specific limitation is made here.

[0052] like Figure 4 As shown, in one embodiment, the check valve 35 is disposed in the second exhaust chamber 303. The check valve 35 includes a valve plate 351 and a limiter 352 disposed on the side of the valve plate 351 away from the exhaust port. The valve plate 351 is used to open or close the exhaust port, and the limiter 352 is used to limit the maximum travel of the valve plate 351 toward the side away from the exhaust port.

[0053] In this embodiment, the check valve 35 is a reed valve formed by the cooperation of a valve plate 351 and a limiter 352. Specifically, the valve plate 351 is located on the side of the stationary scroll plate 32 away from the moving scroll plate 31, with the head of the valve plate 351 facing the outlet port of the second exhaust port 322. The limiter 352 is located on the side of the valve plate 351 away from the outlet port, with one end of the limiter 352 near the head of the valve plate 351 tilted upwards. The limiter 352 and the tail of the valve plate 351 are connected to the stationary scroll plate 32 by a fastener 353. In the non-exhaust state, the valve plate 351 is in contact with the stationary scroll plate 32 to block the outlet port. When gas is discharged from the second exhaust port 322, the gas impacts the valve plate 351, causing the valve plate 351 to lift upwards and open the outlet port, thus connecting the second exhaust port 322 with the second exhaust chamber 303. The limiter 352 can limit the maximum upward stroke of the valve plate 351. The check valve 35 is a reed valve, which has a simple structure, small footprint, and is easy to install. Furthermore, by incorporating the check valve 35, when gas mixed with lubricating oil impacts the valve plate 351, the viscous lubricating oil adheres to the surface of the valve plate 351, achieving a certain oil-gas separation effect and further reducing the oil discharge rate. Of course, other types of check valves 35 can also be used in other embodiments.

[0054] In addition, such as Figure 4 As shown, an exhaust valve 36 can be provided on the side of the stationary scroll plate 32 opposite to the moving scroll plate 31, corresponding to the position of the first exhaust port 321. The exhaust valve 36 opens or closes the outlet end of the first exhaust port 321. Similarly, the exhaust valve 36 enables unidirectional flow of the first exhaust port 321 toward the first exhaust chamber 302, preventing refrigerant from flowing back into the first exhaust port 321, thereby reducing the energy efficiency loss of the first exhaust. Specifically, the exhaust valve 36 may include a valve seat and a movable plate disposed within the valve seat. In the non-exhaust state, the movable plate is attached to the top surface of the stationary scroll plate 32 to block the outlet end of the first exhaust port 321. In the exhaust state, the gas discharged from the first exhaust port 321 impacts the valve plate 351, causing the valve plate 351 to open the first exhaust port 321. The gas discharged from the first exhaust port 321 enters the valve seat and is then discharged from the outlet on the valve seat. In addition, the exhaust valve 36 can also adopt a reed valve structure similar to the check valve 35 in the above embodiment, or other one-way valve structures.

[0055] The exhaust path configuration described in the above embodiments achieves excellent oil-gas separation. To further improve the utilization rate of lubricating oil, such as... Figure 5 As shown, in one embodiment, the stationary vortex disk 32 is provided with an air intake port 325, the moving vortex disk 31 and the stationary vortex disk 32 further define an air intake chamber 304 communicating with the air intake port 325, and the stationary vortex disk 32 is also provided with a choke hole 326 communicating the second exhaust chamber 303 with the air intake chamber 304.

[0056] In this embodiment, the gas discharged from the second exhaust port 322 enters the second exhaust chamber 303, achieving excellent oil-gas separation. The separated lubricating oil accumulates in the second exhaust chamber 303. It is understood that the gas pressure in the second exhaust chamber 303 is typically greater than the gas pressure in the intake chamber 304. By providing the intercepting hole 326, the pressure difference between the second exhaust chamber 303 and the intake chamber 304 can be utilized to allow the lubricating oil in the second exhaust chamber 303 to flow through the intercepting hole 326 into the intake chamber 304. This allows the lubricating oil to flow to the contact area between the stationary scroll plate 32 and the moving scroll plate 31 for lubrication, thereby improving the utilization rate of the lubricating oil and reducing the wear of the stationary scroll plate 32 and the moving scroll plate 31.

[0057] To facilitate the collection and return of lubricating oil, optionally, an oil collection groove 327 is provided at the bottom of the second exhaust chamber 303, and the intercepting hole 326 extends obliquely and connects the oil collection groove 327 to the intake chamber 304. In a specific embodiment, a sealing end cap 33 is provided on the side of the stationary scroll plate 32 away from the moving scroll plate 31. The sealing end cap 33 and the stationary scroll plate 32 surround to form the second exhaust chamber 303, so an oil collection groove 327 can be provided on the side of the stationary scroll plate 32 away from the moving scroll plate 31. Furthermore, when a check valve 35 is provided in the second exhaust chamber 303, the oil collection groove 327 can be located below the valve plate 351 of the check valve 35. When gas mixed with lubricating oil impacts the valve plate 351, the lubricating oil is viscous and adheres to the bottom surface of the valve plate 351. Then, the lubricating oil can accumulate in the oil collection groove 327 under the action of gravity, and then flow into the suction chamber 304 through the intercepting hole 326. In this way, the recycling rate of lubricating oil can be further improved.

[0058] Furthermore, traditional dual-exhaust scroll compressors typically do not consider the difficulties in actual manufacturing and assembly, resulting in poor manufacturability. For example, in related technologies, the exhaust pipe connected to the second exhaust port of the stationary scroll plate is usually led directly out from the top of the casing. Since the stationary scroll plate is far from the top of the casing, the positional accuracy between the two is difficult to guarantee, which brings difficulties to the exhaust pipe connection and makes mass production difficult.

[0059] To improve manufacturability, based on the above embodiments, such as Figures 1 to 4As shown, in some embodiments, the side wall of the housing 10 is provided with a through hole 101 for the exhaust pipe 20 to pass through, and the intermediate exhaust channel 323 has a pipe interface 3233 that penetrates the circumference of the static vortex disk 32. The pipe interface 3233 is arranged opposite to the through hole 101, and the air inlet end of the exhaust pipe 20 passes through the through hole 101 and the pipe interface 3233 and is connected to the intermediate exhaust channel 323. In this embodiment, an intermediate exhaust channel 323 is provided within the stationary vortex disk 32. This intermediate exhaust channel 323 extends radially along the stationary vortex disk 32, penetrating its circumferential surface. This results in a pipe interface 3233 forming on the circumferential surface of the stationary vortex disk 32. The pipe interface 3233 is close to and corresponds to the through hole 101 on the housing 10, making it easy to ensure their positional accuracy. During assembly, the intake end of the exhaust pipe 20 can be conveniently inserted into the intermediate exhaust channel 323 through the through hole 101 and the pipe interface 3233 to connect with the stationary vortex disk 32. This assembly method has low precision requirements and high manufacturability. The exhaust end of the exhaust pipe 20 can be used to connect to the corresponding part of the heat pump system.

[0060] Furthermore, such as Figure 3 and Figure 4 As shown, the intermediate exhaust channel 323 includes an exhaust section 3231 communicating with the second exhaust port 322, and a connecting section 3232 connecting the exhaust section 3231 with the pipe interface 3233. The inner diameter of the exhaust section 3231 is smaller than the inner diameter of the connecting section 3232, so as to form a limiting step 3234 at the adjacent part of the exhaust section 3231 and the connecting section 3232. The air inlet end of the exhaust pipe 20 is inserted into the connecting section 3232, and the limiting step 3234 is used to limit the fit with the end face of the exhaust pipe 20. Thus, when assembling the exhaust pipe 20, after the exhaust pipe 20 is inserted into the connecting section 3232, the end face of the exhaust pipe 20 abuts against the limiting step 3234, thereby achieving rapid positioning and assembly.

[0061] like Figure 2As shown, in one embodiment, the exhaust pipe 20 includes a main pipe 21 and a connecting pipe 22. One end of the connecting pipe 22 is inserted into the intermediate exhaust channel 323, and the other end of the connecting pipe 22 extends out of the housing 10 and connects to the main pipe 21. The outer peripheral wall of the connecting pipe 22 is sealed to the inner peripheral wall of the intermediate exhaust channel 323. Specifically, the connecting pipe 22 can serve as the air inlet of the exhaust pipe 20. During assembly, the connecting section 3232 of the connecting pipe 22 and the intermediate exhaust channel 323 are inserted into each other, and then the air inlet of the main pipe 21 is inserted into the end of the connecting pipe 22 and the two are welded together. The assembly structure is simple, stable, and reliable. Furthermore, the sealed fit between the outer peripheral wall of the connecting pipe 22 and the inner peripheral wall of the intermediate exhaust channel 323 enables a seal between the intermediate exhaust channel 323 and the inner cavity of the housing 10. This solution solves the problem of difficult installation of the medium-pressure exhaust pipe 20 of the sealed scroll compressor 100 while fully considering sealing, and has strong manufacturability.

[0062] There are various sealing structures between the connecting pipe 22 and the intermediate exhaust channel 323. For example, such as... Figure 2 As shown, in one embodiment, the exhaust pipe 20 further includes a liner 23 disposed within the connecting pipe body 22. The liner 23 is interference-fitted with the connecting pipe body 22 so that the outer peripheral wall of the connecting pipe body 22 is sealed to the inner peripheral wall of the intermediate exhaust channel 323. Specifically, during assembly, one end of the connecting pipe body 22 is first inserted into the intermediate exhaust channel 323, and then the liner 23 is pressed into the connecting pipe body 22 from the other end of the connecting pipe body 22 near the intermediate exhaust channel 323. The liner 23 is interference-fitted with the connecting pipe body 22, thereby causing the connecting pipe body 22 to tighten the intermediate exhaust channel 323, achieving a sealed connection between the two. Then, the air inlet end of the main pipe body 21 is welded to the connecting pipe body 22. The assembly process is simple and the sealing reliability is strong.

[0063] For example, in another embodiment, a sealing element is provided between the connecting pipe 22 and the intermediate exhaust channel 323 to ensure a sealing fit between the outer peripheral wall of the connecting pipe 22 and the inner peripheral wall of the intermediate exhaust channel 323. For example, the sealing element can be a sealing ring or sealant disposed between the connecting pipe 22 and the intermediate exhaust channel.

[0064] This invention also proposes a heat pump system, which includes a scroll compressor 100. The specific structure of the scroll compressor 100 is as described in the above embodiments. Since this heat pump system adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here. This heat pump system can be used in air conditioners, refrigerators, hot air blowers, water heaters, etc.

[0065] In this embodiment, the heat pump system solves the problem of requiring multiple compressors in a single-suction, double-exhaust system by using the aforementioned scroll compressor 100 with dual exhaust function, thereby reducing costs and the overall system size and weight. Furthermore, the scroll compressor 100 also includes an intermediate exhaust channel 323 within the stationary scroll plate 32. The second exhaust port 322 is connected to the exhaust pipe 20 via the intermediate exhaust channel 323, allowing the refrigerant gas discharged from the second exhaust port 322 to be transported a certain distance via the intermediate exhaust channel 323 before being discharged to the outside of the casing 10 via the exhaust pipe 20. This extends the flow path of the refrigerant gas within the stationary scroll plate 32, facilitating oil-gas separation. Moreover, the gas delivery direction of the second exhaust port 322 differs from that of the intermediate exhaust channel 323, causing the refrigerant gas to be transported along a non-linear path within the stationary scroll plate 32. The change in flow direction during exhaust further enhances the oil-gas separation effect. In this way, the oil discharge rate of the scroll compressor 100 can be effectively reduced, thereby reducing the amount of lubricating oil flowing out to the heat exchanger of the heat pump system. This avoids the performance degradation of the heat exchanger due to lubricating oil adhering to it. At the same time, it ensures that there is sufficient lubricating oil inside the scroll compressor 100 to prevent wear caused by insufficient oil, thereby improving the performance reliability of the scroll compressor 100 and the entire heat pump system.

[0066] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A scroll compressor, characterized in that, include: The housing has an exhaust pipe on one side; as well as A compression assembly is disposed within the housing. The compression assembly includes a moving scroll plate and a stationary scroll plate. The moving scroll plate and the stationary scroll plate mesh with each other and define a compression chamber. The stationary scroll plate has a first exhaust port and a second exhaust port that are respectively connected to the compression chamber. The gas pressure discharged from the first exhaust port is greater than the gas pressure discharged from the second exhaust port. The stationary scroll plate also has an intermediate exhaust channel that connects the second exhaust port to the exhaust pipe. The intermediate exhaust channel includes at least a first section, and the extension direction of the first section is different from the extension direction of the second exhaust port.

2. The scroll compressor as described in claim 1, characterized in that, During the movement of the moving scroll relative to the stationary scroll, the compression chamber is divided into an independent first chamber and a second chamber. The first chamber is located in the central region of the stationary scroll, and the second chamber is located in the peripheral region of the first chamber. The first exhaust port is connected to the first chamber, and the second exhaust port is connected to the second chamber, so that the gas pressure discharged from the first exhaust port is greater than the gas pressure discharged from the second exhaust port.

3. The scroll compressor as described in claim 1, characterized in that, The stationary vortex disk, on the side opposite to the moving vortex disk, defines a first exhaust chamber between itself and the housing. The first exhaust port communicates with the first exhaust chamber. An independent second exhaust chamber is provided within the first exhaust chamber. The second exhaust port communicates with the intermediate exhaust channel via the second exhaust chamber.

4. The scroll compressor as described in claim 3, characterized in that, The stationary vortex disk is provided with a sealing end cap on the side opposite to the moving vortex disk. The sealing end cap and the stationary vortex disk surround to form the second exhaust chamber. The second exhaust port has an exhaust port that penetrates the surface of the stationary vortex disk to communicate with the second exhaust chamber. The sealing end cap or the stationary vortex disk is provided with an intermediate exhaust port that communicates the second exhaust chamber with the intermediate exhaust channel.

5. The scroll compressor as described in claim 4, characterized in that, A sealing gasket is provided between the sealing end cap and the stationary vortex disk.

6. The scroll compressor as described in claim 4, characterized in that, The compression assembly also includes a check valve disposed between the second exhaust port and the second exhaust chamber, the check valve being configured to allow unidirectional flow from the second exhaust port toward the second exhaust chamber.

7. The scroll compressor as described in claim 6, characterized in that, The check valve is located in the second exhaust chamber. The check valve includes a valve plate and a limiter located on the side of the valve plate away from the exhaust port. The valve plate is used to open or close the exhaust port, and the limiter is used to limit the maximum travel of the valve plate toward the side away from the exhaust port.

8. The scroll compressor as described in claim 3, characterized in that, The stationary vortex disk is provided with an air intake port, and the moving vortex disk and the stationary vortex disk further define an air intake chamber that communicates with the air intake port. The stationary vortex disk is also provided with a choke hole that connects the second exhaust chamber with the air intake chamber.

9. The scroll compressor according to any one of claims 1 to 8, characterized in that, The side wall of the housing is provided with a through hole for the exhaust pipe to pass through. The intermediate exhaust channel has a pipe interface that penetrates the circumference of the static vortex disk. The pipe interface is arranged opposite to the through hole. The air inlet end of the exhaust pipe passes through the through hole and the pipe interface and is connected to the intermediate exhaust channel.

10. The scroll compressor as described in claim 9, characterized in that, The intermediate exhaust channel includes an exhaust section communicating with the second exhaust port and a connecting section communicating with the pipe interface. The inner diameter of the exhaust section is smaller than the inner diameter of the connecting section, so as to form a limiting step at the adjacent part of the exhaust section and the connecting section. The air inlet end of the exhaust pipe is inserted into the connecting section, and the limiting step is used to limit the fit with the end face of the exhaust pipe.

11. The scroll compressor as described in claim 9, characterized in that, The exhaust pipe includes a main pipe and a connecting pipe. One end of the connecting pipe is inserted into the intermediate exhaust channel, and the other end of the connecting pipe extends out of the housing and is connected to the main pipe. The outer peripheral wall of the connecting pipe is sealed to the inner peripheral wall of the intermediate exhaust channel.

12. The scroll compressor as claimed in claim 11, characterized in that, The exhaust pipe also includes a liner disposed within the connecting pipe body, the liner being press-fitted with the connecting pipe body so that the outer peripheral wall of the connecting pipe body is sealed to the inner peripheral wall of the intermediate exhaust channel. Alternatively, a sealing element may be provided between the connecting pipe and the intermediate exhaust channel to ensure a sealing fit between the outer peripheral wall of the connecting pipe and the inner peripheral wall of the intermediate exhaust channel.

13. A heat pump system, characterized in that, Includes the scroll compressor as described in any one of claims 1 to 12.

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