A scroll compressor and an air conditioner including the same

Abstract

The present invention discloses a scroll compressor and an air conditioner including the scroll compressor. The scroll compressor includes a fixed scroll and an orbiting scroll. The fixed scroll includes a fixed portion and a fixed portion, and the orbiting scroll includes a fixed portion and an orbiting portion. The fixed portion and the orbiting portion engage with each other to form an adjustable compression chamber. The adjustable compression chamber has a pressure lead-out structure that leads the medium in the adjustable compression chamber to the back of the orbiting scroll. The orbiting and fixed portion move along the axial direction of the orbiting scroll under the force of the lead-out medium. The pressure lead-out structure is used to lead the medium in the adjustable compression chamber to the back of the orbiting scroll, thereby achieving stepless and continuous adjustment of the internal compression ratio within a certain range. The internal compression ratio automatically responds to the external compression ratio requirements of different working conditions, effectively reducing the additional energy loss of the compressor and improving the operating efficiency of the compressor.

Description

Technical Field

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

[0002] Most scroll compressors are positive displacement compressors with a fixed internal compression ratio. The internal compression ratio is the ratio of the exhaust pressure to the suction pressure of the compressor pump body. The internal compression ratio is a structural parameter and does not change with changes in operating conditions. It is only related to the structural parameters of the pump body, such as pitch, wall thickness, profile type, etc., and is designed according to a specific operating condition. The external compression ratio of the compressor, that is, the ratio of the condensing pressure to the evaporating pressure, is determined by the operating environment and the target environment. It changes with changes in the system operating conditions, but the internal compression ratio is not affected by the external compression ratio. When the actual operating conditions deviate from the design conditions, the internal compression ratio is inconsistent with the external compression ratio. The deviation between the two will result in a process of isochoric compression or expansion, which is called over-compression or under-compression. When the compressor is under-compressed or over-compressed, additional energy loss will be generated, reducing the operating efficiency of the compressor.

[0003] Related art includes scroll compressors with adjustable internal compression ratios. These achieve internal compression ratio adjustment with a small shell diameter by switching between two-dimensional and three-dimensional compression within the compression chamber. However, these scroll compressors can only switch between two fixed design pressure ratios, failing to ensure complete consistency between the internal and external compression ratios. This ineffectively addresses energy loss during the compression process, resulting in low compressor efficiency. Summary of the Invention

[0004] The present invention provides a scroll compressor and an air conditioner including the scroll compressor. The scroll compressor has a structure with an adjustable internal compression ratio. The internal compression ratio is adaptively adjusted according to the external compression ratio of the actual operating conditions of the compressor, thereby achieving real-time stepless adjustment of the internal compression ratio within a certain range, thereby eliminating the additional energy loss of the compressor caused by the inconsistency of the internal and external compression ratios, and improving the operating efficiency of the compressor.

[0005] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides a scroll compressor, including a stationary scroll and a movable scroll, the stationary scroll including a stationary disk fixing portion and a stationary disk slider that are engaged with each other, and the movable scroll including a movable disk fixing portion and a movable disk slider that are engaged with each other; the stationary disk slider and the movable disk slider are engaged with each other to form an adjustable compression chamber; the adjustable compression chamber has a pressure lead-out structure, the pressure lead-out structure leads the medium in the adjustable compression chamber to the back of the movable scroll, and the movable disk slider and the stationary disk slider move along the axial direction of the movable scroll under the action of the lead-out medium.

[0006] In some embodiments, the compression space formed by the meshing of the fixed scroll and the orbiting scroll has an intake chamber, an intermediate pressure chamber and an exhaust chamber. After the intake chamber sucks in the medium, the intermediate pressure chamber compresses the medium, and the compressed medium is discharged from the exhaust chamber; the adjustable compression chamber is smaller than or equal to the intermediate pressure chamber.

[0007] In some embodiments, the pressure outlet structure only outlets the medium in the medium-pressure chamber.

[0008] In some embodiments, the back of the movable scroll plate has a movable plate back pressure chamber, and the pressure lead-out structure introduces the medium in the adjustable compression chamber into the movable plate back pressure chamber. The force exerted on the movable plate fixed part by the medium in the movable plate back pressure chamber is greater than or equal to the force exerted by the medium in the compression space.

[0009] In some embodiments, the combined force of the force exerted on the static plate slider by the medium in the adjustable compression chamber and the force exerted on the dynamic plate slider by the medium in the dynamic plate back pressure chamber is balanced by the force exerted on the static plate slider by the medium discharged from the exhaust chamber.

[0010] In some embodiments, the movable plate slider has a first scroll tooth, the movable plate fixing portion has a second scroll tooth, the first scroll tooth is engaged with the second scroll tooth; the movable plate fixing portion has a tooth groove for accommodating the first scroll tooth, and the first scroll tooth moves in the tooth groove.

[0011] In some embodiments, the pressure-introducing structure includes a first pressure-introducing channel disposed on the first scroll tooth.

[0012] In some embodiments, the pressure-leading structure includes a second pressure-leading channel provided on the static plate slider and a third pressure-leading channel provided on the static plate fixing portion, and the second pressure-leading channel is in communication with the third pressure-leading channel.

[0013] According to another aspect of the present application, an embodiment of the present invention provides an air conditioner, which includes the scroll compressor described above.

[0014] The present invention sets an adjustable compression chamber in the compression space formed by the static scroll and the movable scroll of the scroll compressor, and uses a pressure lead-out structure to lead the medium in the adjustable compression chamber to the back of the movable scroll, so that the movable disk slider moves along the axial direction of the movable scroll, thereby achieving the purpose of steplessly and continuously adjusting the internal compression ratio within a certain range. The internal compression ratio can be adjusted without increasing the diameter of the scroll, thereby improving the space utilization rate of the compressor. The non-working friction surface of this adjustment method is small, and the power consumption during adjustment is low. The internal compression ratio is adjusted in real time, so that the internal compression ratio automatically responds to the external compression ratio requirements of different working conditions, can adapt to complex and changeable compressor operating conditions, can effectively reduce the additional energy loss of the compressor, and improve the operating efficiency of the compressor.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic structural diagram of a fixed scroll and an orbiting scroll according to an embodiment of the present invention;

[0017] Figure 2 is an exploded view of a fixed scroll and an orbiting scroll according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the pressure lead-out position according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the force acting on the fixed portion of the movable disk according to one embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the axial gas force area of ​​the compressed space of the fixed portion of the movable disk according to one embodiment of the present invention;

[0021] Figure 6 2. It is a schematic diagram of the force-bearing area of ​​the back of the orbiting scroll according to one embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the forces acting on the static disk slider and the dynamic disk slider according to one embodiment of the present invention;

[0023] Figure 8 Schematic diagram of the area of ​​the static disk slider subjected to the axial gas force of the adjustable compression chamber according to one embodiment of the present invention;

[0024] Figure 9 Schematic diagram of the axial gas force area of ​​the static disk slider subjected to the discharged medium according to one embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram of an internal pressure ratio increasing working mode according to an embodiment of the present invention;

[0026] Figure 11 This is a schematic diagram of an internal pressure ratio reduction working mode according to an embodiment of the present invention;

[0027] Figure 12 It is a schematic structural diagram of the second pressure-inducing channel and the third pressure-inducing channel according to an embodiment of the present invention.

[0028] in:

[0029] 1. Stationary scroll; 11. Stationary scroll fixing portion; 111. Third pressure-inducing channel; 12. Stationary scroll slider; 121. Second pressure-inducing channel; 13. Inlet port; 14. Exhaust port; 2. Orbital scroll; 21. Orbital scroll fixing portion; 211. Second scroll tooth; 212. Orbital disk surface; 22. Orbital scroll slider; 221. First scroll tooth; 222. First pressure-inducing channel. DETAILED DESCRIPTION

[0030] To further illustrate the technical means and effects employed by the present invention to achieve its intended objectives, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0031] In the description of the present invention, it should be clarified that the terms "vertical", "transverse", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not mean that the device or element referred to must have a specific orientation or position. Therefore, they cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] This embodiment provides a scroll compressor, such as Figures 1 to 12 As shown, the compressor comprises a fixed scroll 1 and an orbiting scroll 2. The fixed scroll 1 comprises an interlocking fixed portion 11 and a fixed slider 12, while the orbiting scroll 2 comprises an interlocking orbiting fixed portion 21 and an orbiting slider 22. The fixed slider 12 and the orbiting slider 22 mesh together to form an adjustable compression chamber, which compresses the medium introduced into the compressor. The adjustable compression chamber has a pressure extraction structure that extracts the medium within the adjustable compression chamber to the back of the orbiting scroll 2.

[0034] The movable disk slider 22 and the static disk slider 12 abut against each other. Under the action of the lead-out pressure, the movable disk slider 22 and the static disk slider 12 can move in the axial direction of the movable scroll disk 2. The movable disk slider 22 and the static disk slider 12 can slide within a certain distance in the axial direction of the movable scroll disk 2, thereby realizing stepless and continuous adjustment of the compression ratio in the compressor. The scroll compressor provided in this embodiment has a structure in which the internal compression ratio can be adjusted in real time. The internal compression ratio can be adaptively adjusted according to the change in the ratio of the condensing pressure to the evaporating pressure required by the actual operating conditions of the compressor, that is, the change in the external compression ratio. The movable disk slider 22 and the static disk slider 12 are moved through the pressure lead-out structure, and the internal compression ratio is adjusted steplessly and continuously within a certain range of values ​​to match the external compression ratio in real time, thereby reducing or even eliminating the additional energy loss of the compressor caused by the inconsistency of the internal and external compression ratios, thereby improving the operating efficiency of the compressor.

[0035] As a specific implementation method, Figure 1 and Figure 2 As shown, the orbiting scroll 2 includes a fixed portion 21 and a slider 22. The slider 22 has a first scroll 221, and the fixed portion 21 has a second scroll 211. The first scroll 221 engages with the second scroll 211 to form a spiral scroll extension structure. The fixed portion 21 also includes a disk surface 212, which has a tooth groove for accommodating the first scroll 221. The first scroll 221 can move axially along the orbiting scroll 2 within the tooth groove. The stator slider 12 has a tooth bottom structure that meshes with the first scroll 221. The fixed scroll 1 and the orbiting scroll 2 are each divided into a slider structure for the central cavity and a fixed structure on the outside. When the stator slider 12 and the movable scroll slider 22 are in dynamic contact, they together form a complete profile and compression chamber. Unlike the profile of conventional scroll compressors, the profile of the scroll compressor provided in this embodiment is a variable profile that can slide axially. After installation, the stator slider 12 and the movable disk slider 22 are axially connected in series and can move synchronously along the axial direction of the movable scroll 2, realizing the change of the two-dimensional compression mode and the three-dimensional compression mode of the adjustable compression chamber. The two-dimensional compression mode is the compression state of the compressor when the tooth top of the first scroll tooth 221 moves to a position with the same height as the tooth top of the second scroll tooth 211; the three-dimensional compression mode is the compression state of the compressor when the tooth top of the first scroll tooth 221 moves to a position with a different height from the tooth top of the second scroll tooth 211. When the stator slider 12 and the movable disk slider 22 are engaged, no mutual interference will occur in either the two-dimensional compression mode or the three-dimensional compression mode.

[0036] As a specific implementation method, Figures 1 to 11As shown, the pressure extraction structure includes a first pressure-inducing channel 222 provided on the first scroll tooth 221. The first pressure-inducing channel 222 is provided on the movable disk slider 22 to guide the medium in the adjustable compression chamber to the back of the movable scroll 2, generating pressure on the back of the movable disk surface 212 of the movable scroll 2, and also on the movable disk slider 22. Furthermore, a groove is provided on the outer peripheral wall of the first scroll tooth 221 to serve as the first pressure-inducing channel 222. The medium in the adjustable compression chamber can flow out of the adjustable compression chamber through the groove. This arrangement is relatively simple and highly reliable, with negligible impact on structural strength. It can effectively extract the medium in the adjustable compression chamber and achieve the purpose of pressure extraction.

[0037] As an optional pressure extraction method, such as Figure 12 As shown, the pressure extraction structure includes a second pressure-introducing channel 121 provided on the stator slider 12 and a third pressure-introducing channel 111 provided on the stator fixed portion 11. Second pressure-introducing channel 121 communicates with third pressure-introducing channel 111. The medium within the adjustable compression chamber can be extracted through the corresponding pressure-introducing channels provided on the stator slider 12 and the stator fixed portion 11 of the fixed scroll 1. This structure also achieves the purpose of directing the medium to the back of the orbiting scroll 2, thereby exerting a force on the orbiting scroll 2 and the orbiting slider 22.

[0038] like Figure 3As shown, the compression space formed by the meshing of the fixed scroll 1 and the orbiting scroll 2 comprises an intake chamber, an intermediate-pressure chamber, and an exhaust chamber. In a scroll compressor, the meshing of the fixed scroll 1 and the orbiting scroll 2 forms a series of isolated, crescent-shaped, enclosed chambers with continuously changing volumes. The shapes of the intake, intermediate-pressure, and exhaust chambers change in real time, corresponding to the three stages of medium intake, compression, and discharge. Lower-pressure medium is introduced into the compression space through the intake port 13 and first enters the intake chamber. As the orbiting scroll 2 rotates, the enclosed chamber changes, and the intake chamber ceases intake. The already-intaken medium then gradually enters the intermediate-pressure chamber for compression. The pressure of the medium gradually increases compared to the intake pressure, reaching an intermediate pressure. As the orbiting scroll 2 rotates further, the enclosed chamber changes, and the intermediate-pressure medium enters the exhaust chamber connected to the exhaust port 14. At this point, the medium pressure reaches its highest pressure during the compression process. As the orbiting scroll 2 rotates, the high-pressure medium is discharged from the exhaust port 14. The spatial range of the adjustable compression chamber is set to be smaller than or equal to that of the intermediate-pressure chamber. The spatial range of the medium-pressure chamber refers to the series of changing compression spaces in the compression chamber from the time the medium is sucked in and begins to enter the compression state until the compression is completed and discharged from the compression chamber. The spatial range of the adjustable compression chamber refers to the compression space in the adjustable compression chamber that can compress the sucked-in medium. Specifically, by adjusting the shape or size of the static disk slider 12 and the dynamic disk slider 22, the spatial range of the adjustable compression chamber can be adjusted to a state that is less than or equal to the spatial range of the medium-pressure chamber, so that the compressor has the largest adjustable compression chamber volume range when the scroll disk diameter is the same, thereby maximizing the internal compression ratio adjustment range.

[0039] As a specific implementation method, Figures 4 to 11 As shown, the pressure extraction structure only extracts the medium from the medium-pressure chamber. The pressure extraction structure is not connected to the suction or discharge chambers and does not extract the medium from these chambers. The extraction location of the pressure medium that drives the movable disk slider 22 requires special configuration to ensure real-time adjustment of the internal pressure ratio. The pressure extraction structure must extract pressure from the adjustable compression chamber within the height-adjustable region of the movable disk slider 22 and the stator slider 12. Throughout the entire operating cycle of the orbiting scroll 2, the pressure extraction structure remains independent of the suction or discharge chambers. This configuration allows the back pressure of the orbiting scroll 2 to be correlated with the axial position of the movable disk slider 22 and the stator slider 12, allowing the internal compression ratio to vary with slider position. If the pressure extraction structure extracts medium from the suction or discharge chamber, it cannot guarantee that the movable disk slider 22 and the stator slider 12 within the adjustable compression chamber are correlated with the adjustable compression chamber, preventing real-time adaptive adjustment of the internal compression ratio.

[0040] As a specific implementation method, Figures 4 to 11As shown, the back of the orbiting scroll 2 has a back-pressure chamber. A pressure extraction structure directs the medium within the adjustable compression chamber into the back-pressure chamber, increasing the pressure within the chamber and applying pressure to the fixed portion 21. Axial sealing of the orbiting scroll 2 is ensured when the force acting on the fixed portion 21 is greater than or equal to the force exerted by the medium within the compression space.

[0041] Specifically, the movable plate back pressure chamber can be formed into a closed chamber by the compressor bracket supporting the fixed scroll 1 or other structures of the compressor and the back of the movable scroll 2. The movable plate back pressure chamber is used to apply the pressure of the introduced medium to the movable plate fixing portion 21 and the movable plate slider 22. Applying pressure to the movable plate fixing portion 21 can make the sealing between the movable plate fixing portion 21 and the fixed scroll 1 meet the sealing requirements of the meshing movement. Applying pressure to the movable plate slider 22 can make the movable plate slider 22 move along the axial direction of the movable scroll 2. Through the pressure-drawing action of the pressure lead-out structure, after the compressor is running, the pressure of the movable plate back pressure chamber and the pressure of the adjustable compression chamber are automatically equalized.

[0042] Different positions of the medium drawn out of the pressure outlet structure will have different effects on the stress conditions of each component. The position of the medium drawn out is set at a suitable position to meet the axial sealing requirements of the orbiting scroll 2 and the fixed scroll 1. Figures 4 to 6 As shown, the overall pressure of the medium in the compression space formed by the orbiting scroll 2 and the fixed scroll 1 is Pi, of which the pressure of the medium in the adjustable compression chamber is Pb. The medium is introduced from the adjustable compression chamber into the orbiting disk back pressure chamber, so the pressure in the orbiting disk back pressure chamber is also Pb. Ⅰ It is the area of ​​the back of the moving plate fixing part 21 after removing the tooth groove part. i The area of ​​the force exerted by the compression space on the fixed portion 21 of the movable disc. This area is composed of multiple components, so the force exerted by each component is the sum of the forces exerted on each area. The values ​​of i are 1, 2, 3, ..., n, from the radially outermost to the innermost. The pressure Pb of the medium drawn from the adjustable compression chamber generates an axial force F1 on the back of the movable disc fixed portion 21 in the movable disc back pressure chamber. The downward axial gas force exerted by the medium in the compression space on the movable disc fixed portion 21 is F2. This can be expressed as:

[0043] F1=P b S1

[0044]

[0045] F1≥F2

[0046] The medium drawn from the pressure extraction structure must ensure that the force F1 on the orbiting scroll 2 is greater than or equal to the force F2 at any operating angle. This ensures the axial seal between the orbiting scroll 2 and the fixed scroll 1, prevents medium leakage, and enables the compressor to compress the medium normally. The gravity force acting on a component is typically not of the same magnitude as the gas force acting on the component. Therefore, the gravity acting on each component is ignored in the force analysis here.

[0047] As a specific implementation method, Figures 7 to 11 As shown, the sum of the force exerted by the adjustable compression chamber on the static disk slider 12 and the force exerted by the dynamic disk back pressure chamber on the dynamic disk slider 22 is equal to the force exerted by the medium discharged from the exhaust chamber on the static disk slider 12. The compressor housing or other components such as the bracket on the back of the static scroll 1 can form a closed static disk back pressure chamber together with the back of the static scroll 1. The compressed high-pressure medium is discharged from the exhaust chamber through the exhaust port 14 and enters the static disk back pressure chamber. The high-pressure medium will exert a force on the static disk fixing part 11 and the static disk slider 12 of the static scroll 1 in the static disk back pressure chamber. The pressure Pd of the medium discharged from the exhaust port 14 in the static disk back pressure chamber generates a downward axial force F3 on the static disk slider 12. The pressure P of the medium in the variable compression chamber i An upward axial gas force F4 is generated on the static disk slider 12. The pressure Pb of the medium drawn out by the pressure extraction structure generates an upward axial force F5 on the dynamic disk slider 22. It can be expressed as:

[0048] F2=F d ·S II

[0049]

[0050] F5=P b ·S III

[0051] Where S Ⅱ S is the back area of ​​the static disk slider 12; Ⅲ is the back area of ​​the moving disk slider 22; S' i The force area of ​​the adjustable compression chamber on the stator slider 12 is composed of multiple components, so the force applied is the sum of the forces acting on each component. The values ​​of i are 1, 2, 3, …, n, from the radially outermost to the innermost direction. The combined forces of F3, F4, and F5 (F4 + F5 - F3) determine the direction of motion of the rotor slider 22 and the stator slider 12. This motion changes the height of the adjustable compression chamber scroll teeth, thereby achieving automatic and continuous adjustment of the internal pressure ratio.

[0052] Specifically, if Figure 10 and Figure 11As shown, when the axial force F3 generated by the exhaust pressure of the compressed medium increases to a value greater than the combined force of F4 and F5, i.e., F3>F4+F5, the stator slider 12 and the rotor slider 22 move downward synchronously, lowering their positions and reducing the volume of the adjustable compression chamber. This increases the compressor's internal compression ratio, enabling it to match a higher external compression ratio. As the pressure within the adjustable compression chamber increases, the pressure within the rotor backpressure chamber also increases synchronously, increasing the combined force of F4 and F5. When the combined force of F4 and F5 increases to equal that of F3, i.e., F3=F4+F5, the rotor slider 22 and the stator slider 12 experience force equilibrium, maintaining a stable position and height, and the volume of the adjustable compression chamber stabilizes, allowing the internal compression ratio to be adjusted to match the external compression ratio. When the axial force F3 generated by the exhaust pressure of the compressed medium decreases to less than the combined force of F4 and F5, that is, when F3 < F4 + F5, the static plate slider 12 and the movable plate slider 22 move upward synchronously, the position height of the static plate slider 12 and the movable plate slider 22 increases, and the volume of the adjustable compression chamber increases. Subsequently, the internal compression ratio of the compressor decreases to match the external compression ratio until the force balance, that is, F3 = F4 + F5, the volume of the adjustable compression chamber stabilizes, and the internal pressure ratio reaches a stable level. By providing a pressure lead-out structure in the adjustable compression chamber, the pressure of the adjustable compression chamber is correlated with the pressure on the back of the movable scroll 2, achieving real-time stepless and continuous adjustment of the internal compression ratio of the compressor, so that the internal compression ratio is consistent with the external compression ratio, thereby improving the operating efficiency of the compressor.

[0053] The present application also provides an air conditioner, which includes any of the scroll compressors described above.

[0054] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent variation, and modification made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention. It will be readily understood by those skilled in the art that the above advantageous technical features may be freely combined and superimposed without conflict.

Claims

1. A scroll compressor, characterized in that: The invention relates to a fixed scroll and an orbiting scroll, wherein the fixed scroll comprises a fixed portion and a fixed portion engaged with each other, and the orbiting scroll comprises a movable portion and a movable portion engaged with each other; the fixed portion and the movable portion engage with each other to form an adjustable compression chamber; the adjustable compression chamber has a pressure outlet structure, and the pressure outlet structure outlets the medium in the adjustable compression chamber to the back of the orbiting scroll, and the movable portion and the fixed portion move along the axial direction of the orbiting scroll under the force of the outlet medium; the back of the orbiting scroll has a movable portion back pressure chamber, and the fixed scroll and the orbiting scroll engage ... movable portion has a movable portion back pressure chamber, and the fixed scroll and the orbiting scroll engage to form an adjustable compression chamber The compression space is provided with an intake chamber, a medium-pressure chamber and an exhaust chamber, and the spatial range of the adjustable compression chamber is smaller than or equal to the spatial range of the medium-pressure chamber; the pressure lead-out structure introduces the medium in the adjustable compression chamber into the movable plate back-pressure chamber, and the force exerted on the movable plate fixing portion by the medium in the movable plate back-pressure chamber is greater than or equal to the force exerted by the medium in the compression space; the combined force of the force exerted by the medium in the adjustable compression chamber on the static plate slider and the force exerted on the movable plate slider by the medium in the movable plate back-pressure chamber is balanced by the force exerted on the static plate slider by the medium discharged from the exhaust chamber.

2. The scroll compressor according to claim 1, wherein: The suction chamber sucks in the medium, the medium-pressure chamber compresses the sucked-in medium, and the compressed medium is discharged from the exhaust chamber.

3. The scroll compressor according to claim 2, wherein: The pressure outlet structure only outlets the medium in the medium-pressure chamber.

4. The scroll compressor according to any one of claims 1 to 3, characterized in that: The movable plate slider has a first scroll tooth, the movable plate fixing portion has a second scroll tooth, the first scroll tooth is engaged with the second scroll tooth; the movable plate fixing portion has a tooth groove for accommodating the first scroll tooth, and the first scroll tooth moves in the tooth groove.

5. The scroll compressor according to claim 4, wherein: The pressure introduction structure includes a first pressure introduction channel provided on the first scroll tooth.

6. The scroll compressor according to claim 4, characterized in that The pressure lead-out structure includes a second pressure-introducing channel provided on the static plate slider and a third pressure-introducing channel provided on the static plate fixing portion, wherein the second pressure-introducing channel is communicated with the third pressure-introducing channel.

7. An air conditioner, characterized in that: The air conditioner comprises the scroll compressor according to any one of claims 1 to 6.

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