Oil quantity regulating mechanism, scroll compressor and air conditioner

Abstract

The present application provides an oil quantity regulating mechanism, a scroll compressor, and an air conditioner. The oil quantity regulating mechanism includes a base (1), a connecting rod (2), a contraction framework (3), and a filter screen (4). The connecting rod (2) is installed on the base (1), the contraction framework (3) is arranged at one end of the connecting rod (2) away from the base (1), the contraction framework (3) has an elastic contraction state and an expansion state, the filter screen (4) is arranged on the contraction framework (3), and can contract along with the contraction of the contraction framework (3) and expand along with the expansion of the contraction framework (3). According to the oil quantity regulating mechanism of the present application, dynamic regulation of the oil supply quantity can be realized, and the optimal oil supply quantity in the pump body in the whole frequency band can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of air compression, and in particular to an oil quantity regulating mechanism, a scroll compressor and an air conditioner. Background Art

[0002] In a traditional scroll compressor, part of the lubricating oil sucked up by the oil pump enters the back pressure chamber, and then enters the end face of the pump body (moving and stationary scroll plates) from the back pressure chamber for lubrication to ensure the normal operation of the compressor. The other part of the lubricating oil returns to the oil pool at the bottom of the compressor through the oil return channel for circulation.

[0003] In actual operation, due to the limitations of the compressor structure, when the compressor is running at high frequency, the pump body is prone to lack of oil, while when it is running at low frequency, there is too much lubricating oil flowing to the end face of the pump body, which can easily reduce the performance of the compressor. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide an oil quantity regulating mechanism, a scroll compressor and an air conditioner, which can realize dynamic regulation of the oil supply and ensure the optimal oil supply in the pump body in the full frequency band.

[0005] In order to solve the above problems, the present application provides an oil quantity regulating mechanism, including a base, a connecting rod, a contraction skeleton and a filter. The connecting rod is installed on the base, the contraction skeleton is arranged at the end of the connecting rod away from the base, the contraction skeleton has an elastic contraction state and an expansion state, the filter is arranged on the contraction skeleton and can contract with the contraction of the contraction skeleton and expand with the expansion of the contraction skeleton.

[0006] Preferably, the first end of the shrinkage skeleton is fixedly connected to the end of the connecting rod, and the second end of the shrinkage skeleton can be slidably set on the connecting rod through a ring. The shrinkage skeleton can slide toward the base along the length direction of the connecting rod under the action of pressure to achieve shrinkage, or gather toward the first end of the shrinkage skeleton along the length direction of the connecting rod under the action of its own elastic force to achieve expansion.

[0007] Preferably, the shrinkage skeleton comprises a plurality of elastic skeletons, which are arranged at intervals along the circumference of the connecting rod, the free state of the elastic skeleton is arc-shaped, the first end of the elastic skeleton is fixedly connected to the connecting rod, and the second end of the elastic skeleton is fixedly connected to the collar.

[0008] Preferably, the filter cover is arranged outside the shrinkage frame and shrinks or expands along with the shrinkage frame.

[0009] Preferably, the filter screen is connected between two adjacent elastic frames, and is driven to shrink or expand by the shrinking frames.

[0010] Preferably, the contraction framework includes a plurality of elastic frameworks which are arranged at intervals along the circumferential direction of the connecting rod. The first end of the elastic framework is fixedly connected to the end of the connecting rod, and the second end of the elastic framework extends away from the connecting rod to form an umbrella-shaped structure.

[0011] Preferably, a sealing groove is formed on the outer peripheral side of the base.

[0012] Preferably, the connecting rod includes a large-diameter section and a small-diameter section. The large-diameter section is connected to the base, the small-diameter section is connected to the large-diameter section, and the contraction framework is arranged on the small-diameter section.

[0013] According to another aspect of the present application, a scroll compressor is provided, which includes the above oil quantity regulating mechanism.

[0014] Preferably, the scroll compressor includes a moving scroll, a stationary scroll and an upper bracket. The upper bracket is provided with an oil supply channel. The oil enters the mating surface of the moving scroll and the stationary scroll through the oil supply channel. The oil supply channel includes a first oil supply section and a second oil supply section. The diameter of the second oil supply section is larger than that of the first oil supply section. The contraction framework of the oil quantity regulating mechanism is located in the first oil supply section when the scroll compressor operates at a low frequency, and is located in the second oil supply section when the scroll compressor operates at a high frequency.

[0015] Preferably, the upper bracket is provided with an installation cavity. The base of the oil quantity regulating mechanism can be slidably arranged in the installation cavity. The base and the installation cavity are in sealing fit. The installation cavity on the side of the base close to the connecting rod is communicated with the oil supply channel.

[0016] Preferably, the installation cavity on the side of the base away from the connecting rod is communicated with the exhaust cavity of the scroll compressor. The first oil supply section is located on the side of the second oil supply section away from the base. An elastic member is arranged between the base and the upper bracket. The elastic member can apply an elastic acting force to the contraction framework to enter the first oil supply section.

[0017] Preferably, the installation cavity on the side of the base away from the connecting rod can be selectively communicated with the exhaust channel or the suction channel of the scroll compressor. The second oil supply section is located on the side of the first oil supply section away from the base. An elastic member is arranged between the base and the upper bracket. The elastic member can apply an elastic acting force to the contraction framework to enter the second oil supply section.

[0018] Preferably, the installation cavity on the side of the base away from the connecting rod can be selectively communicated with the exhaust channel or the suction channel of the scroll compressor. The first oil supply section is located on the side of the second oil supply section away from the base. An elastic member is arranged between the base and the upper bracket. The elastic member can apply an elastic acting force to the contraction framework to enter the first oil supply section.

[0019] Preferably, the cross-sectional area of the second oil supply section increases along the flow direction of the oil; or, the second oil supply section has a constant cross-section.

[0020] Preferably, the scroll compressor further includes a three-way valve. The first interface of the three-way valve is connected to the exhaust pipe, the second interface of the three-way valve is connected to the suction pipe, and the third interface of the three-way valve is connected to the installation cavity on the side of the base away from the connecting rod.

[0021] According to another aspect of the present application, there is provided an air conditioner, including the oil quantity adjustment mechanism (6) described above or the scroll compressor described above.

[0022] The oil quantity adjustment mechanism provided by the present application includes a base, a connecting rod, a contraction framework, and a filter screen. The connecting rod is installed on the base, the contraction framework is arranged at the end of the connecting rod away from the base, the contraction framework has an elastic contraction state and an expansion state, the filter screen is arranged on the contraction framework, and can contract with the contraction of the contraction framework and expand with the expansion of the contraction framework. This oil quantity adjustment mechanism can arrange the contraction framework in the oil supply channel of the scroll compressor. By the contraction or expansion of the contraction framework, the filter screen is driven to contract or expand. When the scroll compressor is in the high-frequency operation state, the contraction framework expands, driving the filter screen to expand. At this time, the meshes on the filter screen are in the maximum expansion state, so that when the scroll compressor operates at high frequency, the oil passing area of the filter screen reaches the maximum, and the amount of oil flowing through the oil supply channel increases, meeting the high-frequency oil supply demand. When the scroll compressor is in the low-frequency operation state, the contraction framework contracts, driving the filter screen to contract. At this time, the meshes on the filter screen show a shrinking state, and the amount of oil flowing through the oil supply channel decreases, making the low-frequency oil supply appropriate and meeting the low-frequency oil supply demand of the scroll compressor. By adopting the above oil quantity adjustment mechanism, the dynamic adjustment of the oil supply quantity can be realized, ensuring the optimal oil supply quantity in the pump body in the whole frequency band. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the oil quantity adjustment mechanism according to an embodiment of the present application;

[0024] Figure 2 It is Figure 1 an enlarged structural diagram of part C of

[0025] Figure 3 It is a sectional structural diagram of the oil quantity adjustment mechanism according to an embodiment of the present application;

[0026] Figure 4 It is a schematic structural diagram of the oil quantity adjustment mechanism according to an embodiment of the present application;

[0027] Figure 5 It is Figure 4 an enlarged structural diagram of part D of

[0028] Figure 6 It is a sectional structural diagram of the oil quantity adjustment mechanism according to an embodiment of the present application;

[0029] Figure 7 Structural schematic diagram of an oil volume adjustment mechanism according to an embodiment of the present application;

[0030] Figure 8 Cross-sectional structural schematic diagram of an oil volume adjustment mechanism according to an embodiment of the present application;

[0031] Figure 9 Structural schematic diagram of an oil volume adjustment mechanism according to an embodiment of the present application;

[0032] Figure 10 Structural schematic diagram of a scroll compressor according to an embodiment of the present application;

[0033] Figure 11 is Figure 10 Enlarged structural schematic diagram at position A of;

[0034] Figure 12 is Figure 10 Enlarged structural schematic diagram at position B of;

[0035] Figure 13 Structural schematic diagram of a scroll compressor according to an embodiment of the present application;

[0036] Figure 14 is Figure 13 Enlarged structural schematic diagram at position A of;

[0037] Figure 15 is Figure 13 Enlarged structural schematic diagram at position B of;

[0038] Figure 16 Oil pressure - exhaust pressure action diagram of the oil volume adjustment mechanism of the scroll compressor according to an embodiment of the present application;

[0039] Figure 17 Differential pressure - frequency relationship diagram of the scroll compressor according to an embodiment of the present application;

[0040] Figure 18 Structural schematic diagram of a scroll compressor according to an embodiment of the present application;

[0041] Figure 19 is Figure 18 Enlarged structural schematic diagram at position A of;

[0042] Figure 20 Structural schematic diagram of a scroll compressor according to an embodiment of the present application;

[0043] Figure 21 is Figure 20 Enlarged structural schematic diagram at position A of;

[0044] Figure 22 Structural schematic diagram of a scroll compressor according to an embodiment of the present application;

[0045] Figure 23 For Figure 22 the enlarged structural schematic diagram of part A of

[0046] Figure 24 the structural schematic diagram of a scroll compressor according to an embodiment of the present application;

[0047] Figure 25 For Figure 24 the enlarged structural schematic diagram of part A of

[0048] The reference numerals are shown as:

[0049] 1. Base; 2. Connecting rod; 3. Contracting framework; 4. Filter screen; 5. Sealing groove; 6. Oil quantity regulating mechanism; 7. Moving scroll; 8. Stationary scroll; 9. Upper support; 10. First oil supply section; 11. Second oil supply section; 12. Installation cavity; 13. Three-way valve; 14. Exhaust pipe; 15. Suction pipe; 16. Elastic member; 17. Crankshaft; 18. Oil sump; 19. Sealing ring; 20. Mounting seat. Detailed implementation manners

[0050] Referring to Figures 1 to 9 shown in the figure, according to the embodiment of the present application, the oil quantity regulating mechanism includes a base 1, a connecting rod 2, a contracting framework 3 and a filter screen 4. The connecting rod 2 is installed on the base 1, and the contracting framework 3 is arranged at one end of the connecting rod 2 away from the base 1. The contracting framework 3 has an elastic contracting state and an expanding state. The filter screen 4 is arranged on the contracting framework 3 and can contract with the contraction of the contracting framework 3 and expand with the expansion of the contracting framework 3.

[0051] The oil quantity regulating mechanism can arrange the contracting framework 3 in the oil supply channel of the scroll compressor. By the contraction or expansion of the contracting framework 3, the filter screen 4 is driven to contract or expand. When the scroll compressor is in a high-frequency operation state, the contracting framework 3 expands, driving the filter screen 4 to expand. At this time, the meshes on the filter screen 4 are in the maximum expansion state, so that when the scroll compressor operates at high frequency, the oil passing area of the filter screen 4 reaches the maximum, and the amount of oil flowing through the oil supply channel increases, meeting the high-frequency oil supply requirement. When the scroll compressor is in a low-frequency operation state, the contracting framework 3 contracts, driving the filter screen 4 to contract. At this time, the meshes on the filter screen 4 are in a reduced state, and the amount of oil flowing through the oil supply channel decreases, making the low-frequency oil supply appropriate and meeting the low-frequency oil supply requirement of the scroll compressor. By adopting the above oil quantity regulating mechanism, the dynamic regulation of the oil supply quantity can be realized, and the optimal oil supply quantity in the pump body in the whole frequency band can be ensured.

[0052] In addition, since the filter 4 can shrink or expand in coordination with the shrinking skeleton 3, the lubricating oil entering the end face of the scroll disk can be filtered, thereby reducing the wear caused by fine particle impurities entering the movable and stationary scroll disks, thereby protecting the movable and stationary scroll disks and extending the service life of the movable and stationary scroll disks.

[0053] In one embodiment, the first end of the contraction skeleton 3 is fixedly connected to the end of the connecting rod 2, and the second end of the contraction skeleton 3 is slidably arranged on the connecting rod 2 through a collar. The contraction skeleton 3 can slide toward the base 1 along the length direction of the connecting rod 2 under pressure to achieve contraction, or gather toward the first end of the contraction skeleton 3 along the length direction of the connecting rod 2 under its own elastic force to achieve expansion. In this embodiment, the contraction skeleton 3 can be contracted or expanded by controlling the sliding of the collar along the connecting rod 2, thereby driving the filter screen 4 to contract or expand, and the filter screen 4 is used to adjust the oil passage area to achieve the purpose of adjusting the oil volume.

[0054] In one embodiment, the contraction skeleton 3 includes a plurality of elastic skeletons, and the plurality of elastic skeletons are arranged at intervals along the circumference of the connecting rod 2, and the free state of the elastic skeleton is an arc, and the first end of the elastic skeleton is fixedly connected to the connecting rod 2, and the second end of the elastic skeleton is fixedly connected to the collar. In the present embodiment, the free form of the elastic skeleton is an arc, and therefore, when the elastic skeleton is in a free state, the contraction skeleton 3 expands to a maximum, and at this time, the mesh of the filter screen 4 is also opened to a maximum, and the flow area reaches a maximum, and the oil flow rate is maximum, and at this time, it can match the high-frequency operation state of the scroll compressor. When the elastic skeleton is compressed and contracted, the elastic skeleton begins to push the connecting rod 2 to move toward the base 1, so that the curvature of the elastic skeleton becomes smaller, the height becomes lower, and the cross-section of the entire contraction skeleton 3 becomes smaller, and the filter screen 4 is also contracted accordingly, and the mesh also begins to become smaller, the flow area becomes smaller, and the oil flow rate becomes smaller, and at this time, it can match the low-frequency operation state of the scroll compressor.

[0055] In one embodiment, the filter screen 4 is covered outside the shrinking frame 3 and shrinks or expands with the shrinking frame 3. In this embodiment, the filter screen 4 and the shrinking frame 3 can be fixed only at both ends, and there is no direct connection relationship in the middle position. The shrinkage of the filter screen 4 mainly depends on the squeezing of the oil channel, and the expansion of the filter screen 4 mainly depends on the expansion effect of the shrinking frame 3.

[0056] In one embodiment, the filter screen 4 is connected between two adjacent elastic frameworks and is driven by the contracting framework 3 to contract or expand. In this embodiment, since the filter screen 4 is connected to the elastic framework and moves with the movement of the elastic framework, the contraction or expansion of the filter screen 4 is determined by the contracting framework 3 and is driven by the contracting framework 3 to contract or expand. In this embodiment, the state of the filter screen 4 has better consistency with the movement of the contracting framework 3, so that the state of the filter screen 4 can be more controlled and can better meet the requirements for controlling the area of the oil passage.

[0057] In one embodiment, the contracting framework 3 includes a plurality of elastic frameworks which are arranged at intervals along the circumferential direction of the connecting rod 2. The first end of the elastic framework is fixedly connected to the end of the connecting rod 2, and the second end of the elastic framework extends away from the connecting rod 2 to form an umbrella-like structure. In this embodiment, one end of the elastic framework is fixed and the other end is a cantilever structure. When the elastic framework enters a narrow channel, the cantilever end is pressed and retracted, driving the filter screen 4 to retract, thereby reducing the mesh holes of the filter screen 4 and reducing the oil flow area. When the elastic framework enters a wider channel, the cantilever end expands under the action of elasticity, driving the filter screen 4 to expand, thereby increasing the mesh holes of the filter screen 4 and increasing the oil flow area.

[0058] In one embodiment, a sealing groove 5 is formed on the outer peripheral side of the base 1, and a sealing ring 19 is arranged in the sealing groove 5, which can form a sealing fit between the outer peripheral side of the base 1 and the inner peripheral wall of the mating structure, ensuring the sealing of the use environment of the oil quantity regulating structure.

[0059] In one embodiment, the connecting rod 2 includes a large-diameter section and a small-diameter section. The large-diameter section is connected to the base 1, the small-diameter section is connected to the large-diameter section, and the contracting framework 3 is arranged on the small-diameter section. In this embodiment, by increasing the large-diameter section, the structural strength of the connecting rod 2 can be improved, and in addition, it is also convenient to achieve guidance between the large-diameter section and the guiding hole, improving the movement accuracy.

[0060] Referring to Figures 1 to 25 As shown, according to the embodiment of the present application, the scroll compressor includes the above-mentioned oil quantity regulating mechanism 6.

[0061] In this embodiment, the oil quantity regulating mechanism 6 can move in the oil supply channel of the scroll compressor and undergo elastic deformation. The cross-sectional diameter of the oil supply channel along the movement direction of the oil quantity regulating mechanism 6 can be equal or unequal. When the cross-sectional diameter is unequal, dynamic regulation of the oil supply quantity can be achieved, making the oil supply quantity more matched with the operating state of the scroll compressor and having higher control accuracy.

[0062] In one embodiment, a scroll compressor includes a moving scroll 7, a stationary scroll 8, and an upper bracket 9. The upper bracket 9 is provided with an oil supply passage. Oil enters the mating surface of the moving scroll 7 and the stationary scroll 8 through the oil supply passage. The oil supply passage includes a first oil supply section 10 and a second oil supply section 11. The diameter of the second oil supply section 11 is larger than that of the first oil supply section 10. The contraction skeleton 3 of the oil quantity adjustment mechanism 6 is located in the first oil supply section 10 when the scroll compressor operates at a low frequency, and is located in the second oil supply section 11 when the scroll compressor operates at a high frequency.

[0063] In this embodiment, the upper bracket 9 further includes an oil sump 18. The oil supply passage is communicated with the oil sump 18. When the scroll compressor is operating, the lubricating oil sucked up by the crankshaft 17 from the bottom of the compressor first enters the oil sump 18 of the upper bracket 9, then enters the oil supply passage from the oil sump 18, and then enters the end faces of the moving and stationary scrolls, thereby realizing the lubrication of the end faces of the moving and stationary scrolls.

[0064] In this embodiment, the contraction skeleton 3 of the oil quantity adjustment mechanism 6 is arranged in the oil supply passage, and by adjusting the movement position of the oil quantity adjustment mechanism 6, the contraction skeleton 3 is located in the first oil supply section 10 or the second oil supply section 11, so as to realize the adjustment of the oil passage area. When the contraction skeleton 3 of the oil quantity adjustment mechanism 6 is not subjected to force, the contraction skeleton 3 is in a free state. At this time, the filter screen 4 wrapped on the contraction skeleton 3 is also in an unfolded state, and the meshes on the filter screen 4 are in the maximum unfolded state.

[0065] When the contraction skeleton 3 is subjected to an external force, the contraction skeleton 3 will elastically contract. At this time, the filter screen 4 wrapped on the contraction skeleton 3 also elastically contracts accordingly. The meshes on the filter screen 4 receive the acting force of the contraction skeleton 3, thereby undergoing elastic deformation and presenting a reduced state.

[0066] In one embodiment, the upper bracket 9 is provided with an installation cavity 12. The base 1 of the oil quantity adjustment mechanism 6 is slidably arranged in the installation cavity 12. The base 1 and the installation cavity 12 are in sealing fit. The installation cavity 12 on the side of the base 1 close to the connecting rod 2 is communicated with the oil supply passage. In this embodiment, the sealing ring 19 on the circumferential side of the base 1 can isolate the spaces at both ends of the base 1 from each other, so that the position adjustment of the oil quantity adjustment mechanism 6 can be realized by using the pressure difference on both sides of the base 1.

[0067] In one embodiment, the cross-sectional area of the second oil supply section 11 increases along the flow direction of the oil, so as to realize the real-time adjustment of the oil quantity and higher adjustment accuracy.

[0068] In one embodiment, the second oil supply section 11 has a constant cross-section.

[0069] In one embodiment, the mounting cavity 12 on the side of the base 1 away from the connecting rod 2 communicates with the exhaust cavity of the scroll compressor. The first oil supply section 10 is located on the side of the second oil supply section 11 away from the base 1. An elastic member 16 is provided between the base 1 and the upper support 9. The elastic member 16 can apply an elastic force to the contraction skeleton 3 to enter the first oil supply section 10. The above-mentioned elastic member 16 is, for example, a spring.

[0070] In this embodiment, the contraction skeleton 3 of the oil quantity regulating mechanism 6 is arranged in the oil supply channel. The oil supply channel includes a horizontal section and a vertical section. The first oil supply section 10 and the second oil supply section 11 are both located in the vertical section. The lubricating oil coming in from the oil sump 18 of the upper support 9 needs to pass through the filter screen 4 on the oil quantity regulating mechanism 6 to achieve the effect of flowing from the horizontal section of the oil supply channel to the vertical section and then to the end faces of the fixed scroll and the orbiting scroll.

[0071] In this embodiment, the oil supply channel in the vertical section is a step - type structure with a narrower upper part and a wider lower part. The diameter of the first oil supply section 10 extending to the fixed scroll 8 is smaller than the diameter of the oil supply channel of the second oil supply section 11 of the upper support 9.

[0072] The upper end of the base 1 of the oil quantity regulating mechanism 6 is filled with lubricating oil from the oil sump 18. The pressure P1 of the lubricating oil = the pressure difference ΔP between the inlet and outlet of the oil pump + the exhaust pressure P2. Therefore, the force received by the upper end of the base of the oil quantity regulating mechanism 6 = (ΔP + P2) * S1. There is a spring connection between the oil quantity regulating mechanism 6 and the lower cavity of the mounting cavity 12. The lower cavity of the mounting cavity 12 is filled with the exhaust pressure. Therefore, the force received by the lower end of the base 1 of the oil quantity regulating mechanism 6 = the spring elastic force kx + the exhaust pressure P2S2. The areas of the upper and lower ends can be considered approximately equal, S1≈S2 = S.

[0073] When the oil pump is not working, ΔP = 0, and the pressures at the upper and lower ends of the oil quantity regulating mechanism 6 are the same (ΔP * S = 0). At this time, the initial compression elastic force kx0 of the spring ≥ the self - weight mg of the oil quantity regulating mechanism 6. At this time, the oil quantity regulating mechanism 6 is located at the upper limit surface. When the oil pump starts to work, the pressure difference ΔP between the inlet and outlet of the oil pump changes with the frequency. As shown in Figure 17, when the pressure difference ΔP * S between the upper and lower ends of the base 1 > kx0 - mg, the base 1 starts to move downward, and the spring compression amount increases. The oil quantity regulating mechanism reaches a new force - balance state. Obviously, the higher the frequency, the greater the downward displacement of the base 1 at equilibrium.

[0074] At low frequencies, the displacement of the base 1 is small, and the contraction framework 3 of the oil quantity regulating mechanism 6 is located at the narrow first oil supply section 10, that is, in the oil supply channel on the static scroll plate 8. At this time, the contraction framework 3 of the oil quantity regulating mechanism 6 undergoes elastic contraction under the pressure exerted by the side wall of the first oil supply section 10, and the filter screen 4 wrapped around the contraction framework 3 also undergoes elastic contraction accordingly. The meshes on the filter screen 4 are subjected to the force of the contraction framework 3 and thus present a reduced state. At this time, less lubricating oil enters the first oil supply section 10 from the second oil supply section 11, thereby achieving the appropriate effect of oil supply at low frequencies.

[0075] At high frequencies, the displacement of the base 1 is large, and the contraction framework 3 of the oil quantity regulating mechanism 6 is located at the loose position of the second oil supply section 11. At this time, the pressure exerted by the side wall of the second oil supply section 11 becomes smaller, and the contraction framework 3 gradually expands. The filter screen 4 wrapped around the contraction framework 3 also expands accordingly. The meshes on the filter screen 4 are subjected to the force of the contraction framework 3 and thus undergo elastic deformation, presenting an expanded and enlarged state, so that more lubricating oil enters the first oil supply section 10 from the second oil supply section 11, thereby solving the problem of insufficient oil supply at high frequencies.

[0076] In one embodiment, the scroll compressor further includes a pressure regulating mechanism. The pressure regulating mechanism is communicated with the installation cavity 12 of the base 1 far from the contraction framework 3 and can adjust the pressure in the installation cavity 12 on this side, so as to adjust the pressure difference relationship between the two sides of the base 1 and achieve the purpose of adjusting the position of the oil quantity regulating mechanism 6. In this embodiment, the pressure regulating mechanism includes a three-way valve 13. The first interface of the three-way valve 13 is connected to the exhaust pipe 14, the second interface of the three-way valve 13 is connected to the suction pipe 15, and the third interface of the three-way valve 13 is connected to the installation cavity 12 of the base 1 on the side far from the connecting rod 2.

[0077] In one embodiment, the installation cavity 12 of the base 1 on the side far from the connecting rod 2 can be selectively communicated with the exhaust passage or the suction passage of the scroll compressor. The second oil supply section 11 is located on the side of the first oil supply section 10 far from the base 1. An elastic member 16 is provided between the base 1 and the upper support 9, and the elastic member 16 can exert an elastic acting force on the contraction framework 3 to enter the second oil supply section 11.

[0078] In this embodiment, a pressure regulating mechanism can be provided in the pressure cavity at the lower end of the base 1. The oil supply channel for adjusting the oil quantity regulating mechanism 6 is a gradually changing structure that is wider at the top and narrower at the bottom, that is, the diameter of the oil supply channel is larger in the direction closer to the static scroll plate 8.

[0079] In this embodiment, the force received by the upper end of the base 1 of the oil quantity regulating mechanism 6 = (ΔP + P2)S; the base 1 of the oil quantity regulating mechanism 6 is spring-connected to the lower cavity of the installation cavity 12, and the pressure in the lower cavity is variable and denoted as P. Therefore, the force received by the lower end of the base 1 of the oil quantity regulating mechanism 6 = spring elastic force kx + pressure P*S.

[0080] For this embodiment, when the contraction skeleton 3 of the oil quantity regulating mechanism 6 is in the second oil supply section 11, the spring compression amount is x0. At this time, the elastic force should be greater than the sum of the maximum fluid pressure difference and gravity when the back of the base 1 is at the exhaust pressure, and less than the sum of the fluid pressure difference and gravity when the back of the base 1 is at the suction pressure, that is: ΔPmax*S + mg < kx0 < (P2 - Psuction)*S + mg. When the back is at the exhaust pressure, the two offset each other and only the oil pump pressure remains.

[0081] When the scroll compressor operates at low frequency, the three-way valve 13 is connected to the suction pipe 15, and the lower cavity of the installation cavity 12 is at the suction pressure. The fluid pressure difference on the upper and lower end faces of the base 1 is greater than the spring elastic force, that is, kx0 < (P2 - Psuction)*S + mg. The oil quantity regulating mechanism 6 moves downward, and after the spring compression amount increases, it reaches equilibrium. When the contraction skeleton 3 of the oil quantity regulating mechanism 6 is at the narrow position of the first oil supply section 10, at this time, the contraction skeleton 3 of the oil quantity regulating mechanism 6 undergoes elastic contraction under the pressure exerted by the side wall of the first oil supply section 10, and the filter screen 4 wrapped around the contraction skeleton 3 also undergoes elastic contraction accordingly. The grids on the filter screen 4 undergo elastic deformation under the action of the contraction skeleton 3 and present a shrunk state, so that the lubricating oil entering the second oil supply section 11 from the first oil supply section 10 is reduced, solving the problem of excessive oil supply at low frequency.

[0082] When the scroll compressor operates at high frequency, the three-way valve 13 is connected to the exhaust pipe 14, and the spring elastic force is greater than the pressure difference at both ends of the base 1, that is, ΔPmax*S + mg < kx0. The oil quantity regulating mechanism 6 rises along the direction of the stationary scroll 8 until it contacts the limit pin provided in the oil supply channel. The contraction skeleton 3 of the oil quantity regulating mechanism 6 is at the loose position of the second oil supply section 11. At this time, the pressure exerted by the side wall gradually becomes smaller and even disappears, and the contraction skeleton 3 gradually unfolds. The filter screen 4 wrapped around the contraction skeleton 3 also unfolds accordingly. The grids on the filter screen 4 undergo elastic deformation under the action of the contraction skeleton 3 and present an unfolded and enlarged state, so that the lubricating oil entering the second oil supply section 11 from the first oil supply section 10 increases, thus solving the problem of insufficient oil supply at high frequency.

[0083] In one embodiment, the installation cavity 12 located on the side of the base 1 away from the connecting rod 2 can be selectively connected to the exhaust channel or the suction channel of the scroll compressor. The first oil supply section 10 is located on the side of the second oil supply section 11 away from the base 1. An elastic member 16 is provided between the base 1 and the upper support 9, and the elastic member 16 can exert an elastic force on the contraction skeleton 3 to enter the first oil supply section 10.

[0084] In this embodiment, the oil quantity regulating mechanism 6 is horizontally arranged in the oil supply passage. The back pressure chamber of the base 1 can be provided with the above-mentioned pressure regulating mechanism. The oil supply passage where the oil quantity regulating mechanism 6 is arranged has a mutation structure that is wider on the left and narrower on the right. The end closer to the oil sump 18 is narrower, and the end farther from the oil sump 18 is wider.

[0085] The force received by the right end of the base 1 of the oil quantity regulating mechanism 6 = (ΔP + P2)S; the oil quantity regulating mechanism 6 is spring-connected to the left cavity of the installation cavity 12, and the pressure in the left cavity can be marked as P. Therefore, the force received by the left end of the base 1 of the oil quantity regulating mechanism 6 = spring elastic force kx + pressure P*S.

[0086] For this embodiment, when the oil quantity regulating mechanism 6 is located in the first oil supply section 10, the spring compression amount is x0. At this time, the elastic force should be greater than the maximum fluid pressure difference when the back of the base 1 is the exhaust pressure and less than the fluid pressure difference when the back of the base 1 is the suction pressure, that is: ΔPmax*S < kx0 < (P2 - Psuction)*S.

[0087] When operating at low frequency, the three-way valve 13 is connected to the exhaust pipe 14, and the pressure in the left cavity is the exhaust pressure. The spring elastic force is greater than the pressure difference between the two ends of the base 1, that is: ΔPmax*S < kx0. The tail of the base 1 is located at the right limit surface. The contraction skeleton 3 of the oil quantity regulating mechanism 6 is in the narrow position of the first oil supply section 10. At this time, the contraction skeleton 3 of the oil quantity regulating mechanism 6 is elastically contracted under the pressure exerted by the side wall of the first oil supply section 10, and the filter screen 4 wrapped on the contraction skeleton 3 also elastically contracts accordingly. The meshes on the filter screen 4 are elastically deformed under the action of the contraction skeleton 3 and present a reduced state, so that the lubricating oil entering the second oil supply section 11 from the first oil supply section 10 is reduced, thus solving the problem of excessive oil supply at low frequency.

[0088] When operating at high frequency, the three-way valve 13 is connected to the suction pipe 15, and the pressure in the left cavity is the suction pressure. The spring elastic force is less than the pressure difference between the two ends of the base 1, that is: kx0 < (P2 - Psuction)*S. The oil quantity regulating mechanism 6 will move to the left until the contraction skeleton 3 is located in the second oil supply section 11. The contraction skeleton 3 of the oil quantity regulating mechanism 6 is in the loose position of the second oil supply section 11; at this time, the pressure exerted by the side wall of the second oil supply section 11 gradually becomes smaller or even disappears, and the contraction skeleton 3 gradually unfolds. The filter screen 4 wrapped on the contraction skeleton 3 also unfolds accordingly. The meshes on the filter screen 4 are elastically deformed under the action of the contraction skeleton 3 and present an unfolded enlarged state, so that the lubricating oil entering the second oil supply section 11 from the first oil supply section 10 increases, thus solving the problem of insufficient oil supply at high frequency.

[0089] In this embodiment, when the oil quantity regulating mechanism 6 is horizontally arranged, restricted by the structure of the scroll compressor, there will be a problem of insufficient installation space for the oil quantity regulating mechanism 6. To solve this problem, the structure of the scroll compressor is modified in this embodiment. A mounting seat 20 is added to the scroll compressor. The mounting seat 20 is fixedly welded to the outer shell of the scroll compressor. An installation cavity is provided on the mounting seat 20. The base 1 of the oil quantity regulating mechanism 6 is arranged in the installation cavity of the mounting seat 20, so that the oil quantity regulating mechanism 6 has sufficient installation space and at the same time can have sufficient movement space to meet the installation requirements of the oil quantity regulating mechanism 6. In this embodiment, the three-way valve 13 is also arranged outside the outer shell of the scroll compressor and is mounted on the mounting seat 20. The third interface of the three-way valve 13 is directly communicated with the installation cavity of the mounting seat 20 to realize the pressure control in the installation cavity.

[0090] According to an embodiment of the present application, the air conditioner includes the above-mentioned oil quantity regulating mechanism 6 or the above-mentioned scroll compressor.

[0091] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0092] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. An oil quantity regulating mechanism for use in a scroll compressor, characterized in that, The invention comprises a base (1), a connecting rod (2), a contraction frame (3) and a filter (4), wherein the connecting rod (2) is mounted on the base (1), the contraction frame (3) is arranged at one end of the connecting rod (2) away from the base (1), the contraction frame (3) has an elastic contraction state and an expansion state, and the filter (4) is arranged on the contraction frame (3) and can contract as the contraction frame (3) contracts and expand as the contraction frame (3) expands.

2. The fuel quantity regulating mechanism according to claim 1, characterized in that, The first end of the shrinkage frame (3) is fixedly connected to the end of the connecting rod (2), and the second end of the shrinkage frame (3) is slidably arranged on the connecting rod (2) through a ring. The shrinkage frame (3) can slide along the length direction of the connecting rod (2) toward the base (1) under the action of pressure to achieve shrinkage, or gather along the length direction of the connecting rod (2) toward the first end of the shrinkage frame (3) under the action of its own elastic force to achieve expansion.

3. The fuel quantity regulating mechanism according to claim 2, characterized in that, The shrinkage skeleton (3) comprises a plurality of elastic skeletons, the plurality of elastic skeletons are arranged at intervals along the circumference of the connecting rod (2), the free state of the elastic skeleton is arc-shaped, the first end of the elastic skeleton is fixedly connected to the connecting rod (2), and the second end of the elastic skeleton is fixedly connected to the collar.

4. The fuel quantity regulating mechanism according to claim 3, characterized in that, The filter screen (4) is arranged outside the shrinking frame (3) and shrinks or expands along with the shrinking frame (3).

5. The fuel quantity regulating mechanism according to claim 3, characterized in that, The filter screen (4) is connected between two adjacent elastic frames, and is driven to shrink or expand by the shrinking frame (3).

6. The fuel quantity regulating mechanism according to claim 1, characterized in that, The shrinkage skeleton (3) comprises a plurality of elastic skeletons, which are arranged at intervals along the circumference of the connecting rod (2), the first end of the elastic skeleton is fixedly connected to the end of the connecting rod (2), and the second end of the elastic skeleton extends in a direction away from the connecting rod (2) to form an umbrella-shaped structure.

7. The fuel quantity regulating mechanism according to claim 1, characterized in that, A sealing groove (5) is provided on the outer peripheral side of the base (1).

8. The fuel quantity regulating mechanism according to claim 1, characterized in that, The connecting rod (2) comprises a large diameter section and a small diameter section, the large diameter section is connected to the base (1), the small diameter section is connected to the large diameter section, and the shrinkage frame (3) is arranged on the small diameter section.

9. A scroll compressor, characterized in that, The invention comprises the oil quantity regulating mechanism (6) as claimed in any one of claims 1 to 8.

10. The scroll compressor according to claim 9, wherein The scroll compressor comprises a movable scroll (7), a fixed scroll (8) and an upper bracket (9); the upper bracket (9) is provided with an oil supply passage, through which oil enters the mating surfaces of the movable scroll (7) and the fixed scroll (8); the oil supply passage comprises a first oil supply section (10) and a second oil supply section (11); the diameter of the second oil supply section (11) is greater than the diameter of the first oil supply section (10); the contraction skeleton (3) of the oil quantity regulating mechanism (6) is located in the first oil supply section (10) when the scroll compressor is in low-frequency operation, and is located in the second oil supply section (11) when the scroll compressor is in high-frequency operation.

11. The scroll compressor according to claim 10, characterized in that, The upper bracket (9) is provided with an installation cavity (12), the base (1) of the oil quantity regulating mechanism (6) is slidably arranged in the installation cavity (12), the base (1) is in sealing fit with the installation cavity (12), and the installation cavity (12) on one side of the base (1) close to the connecting rod (2) is communicated with the oil supply channel.

12. The scroll compressor according to claim 11, wherein, The installation cavity (12) on one side of the base (1) away from the connecting rod (2) is communicated with the exhaust cavity of the scroll compressor, the first oil supply section (10) is on the side of the second oil supply section (11) away from the base (1), and an elastic member (16) is arranged between the base (1) and the upper bracket (9), and the elastic member (16) can apply an elastic acting force to the contraction framework (3) to enter the first oil supply section (10).

13. The scroll compressor according to claim 11, wherein, The installation cavity (12) on one side of the base (1) away from the connecting rod (2) can be selectively communicated with the exhaust passage or the suction passage of the scroll compressor, the second oil supply section (11) is on the side of the first oil supply section (10) away from the base (1), and an elastic member (16) is arranged between the base (1) and the upper bracket (9), and the elastic member (16) can apply an elastic acting force to the contraction framework (3) to enter the second oil supply section (11).

14. The scroll compressor according to claim 11, characterized in that, The installation cavity (12) on one side of the base (1) away from the connecting rod (2) can be selectively communicated with the exhaust passage or the suction passage of the scroll compressor, the first oil supply section (10) is on the side of the second oil supply section (11) away from the base (1), and an elastic member (16) is arranged between the base (1) and the upper bracket (9), and the elastic member (16) can apply an elastic acting force to the contraction framework (3) to enter the first oil supply section (10).

15. The scroll compressor according to claim 10, wherein, The cross-sectional area of the second oil supply section (11) increases along the flowing direction of the oil; or, the second oil supply section (11) has a constant cross-section.

16. The scroll compressor according to claim 13 or 14, characterized in that, The scroll compressor further includes a three-way valve (13), the first interface of the three-way valve (13) is connected to the exhaust pipe (14), the second interface of the three-way valve (13) is connected to the suction pipe (15), and the third interface of the three-way valve (13) is connected to the installation cavity (12) on one side of the base (1) away from the connecting rod (2).

17. An air conditioner, characterized in that, It includes the oil quantity regulating mechanism (6) according to any one of claims 1 to 8 or the scroll compressor according to any one of claims 9 to 16.

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