A pump body assembly, scroll compressor and air conditioner

Abstract

The application provides a pump body assembly, scroll compressor and air conditioner, the pump body assembly comprising: a moving disc, a crankshaft and an eccentric mass, the crankshaft comprising a crankshaft body and a crank, the crank being located at an axial end of the crankshaft body, and a shaft shoulder being formed at the joint of the crank and the crankshaft body, the moving disc comprising a moving disc bearing seat, at least a part of a shaft section of the moving disc bearing seat being sleeved on the outer periphery of the crank to drive the moving disc bearing seat to move by the crank, the eccentric mass being arranged at the shaft shoulder and located at the outer periphery of the moving disc bearing seat, and the center line of the outer periphery of the eccentric mass being concentric with the center line of the main shaft of the crankshaft. According to the application, the problem that the moving disc bearing seat of the existing scroll compressor exists eccentric oil stirring in the oil pool inside the upper support, resulting in the problem of stirring loss power consumption, can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, specifically to a pump assembly, a scroll compressor, and an air conditioner. Background Technology

[0002] Scroll compressors have advantages such as simple structure, small size, light weight, low noise, high mechanical efficiency, and stable operation. With the development of air conditioning technology, scroll compressors are also developing towards higher efficiency. Conventional scroll compressors suffer from eccentric oil churning in the upper support oil sump of the moving disc bearing housing, which has a significant impact, especially on high-frequency operating conditions. Theoretical simulation analysis shows that the power loss due to this oil churning can reach 2% to 5%.

[0003] Because the existing scroll compressor has an eccentric oil churning in the oil sump of the upper support, resulting in oil churning loss and power consumption, the present invention studies and designs a pump body assembly, a scroll compressor and an air conditioner. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the moving disc bearing seat of the scroll compressor in the prior art has eccentric oil churning inside the oil sump of the upper support, resulting in oil churning loss and power consumption, thereby providing a pump body assembly, a scroll compressor and an air conditioner.

[0005] To address the above problems, the present invention provides a pump body assembly comprising:

[0006] The device comprises a moving disc, a crankshaft, and an eccentric mass block. The crankshaft includes a crankshaft body and a crank arm. The crank arm is located at the axial end of the crankshaft body, and a shoulder is formed at the junction of the crank arm and the crankshaft body. The moving disc includes a moving disc bearing housing. At least a portion of the shaft segment of the moving disc bearing housing is sleeved on the outer periphery of the crank arm so as to drive the moving disc to move by driving the moving disc bearing housing through the crank arm. The eccentric mass block is disposed at the shoulder and located on the outer periphery of the moving disc bearing housing. The centerline of the outer periphery of the eccentric mass block is concentric with the centerline of the crankshaft's main shaft.

[0007] In some implementations...

[0008] The inner circumference of the eccentric mass block is an eccentric hole, and the moving disc bearing seat is inserted into the eccentric hole. The center line of the eccentric hole is concentric with the center line of the crank of the crank. The moving disc bearing seat and the eccentric hole of the eccentric mass block can move relative to each other.

[0009] In some implementations...

[0010] In the axial projection plane, the center line of the main shaft and the center line of the crank are separated by an eccentricity e, and the line connecting the two forms the central axis X. A central axis Y is drawn perpendicular to the central axis X at the center line of the main shaft. The center of mass of the eccentric mass block and the center of mass of the moving disk are both located on the central axis X, and the center of mass of the eccentric mass block and the center of mass of the moving disk are located on both sides of the central axis Y.

[0011] In some implementations...

[0012] In the longitudinal section, the width of the shoulder in the direction perpendicular to the central axis of the crankshaft is greater than the width of the crank in that direction, so as to form a first stepped surface at the junction of the shoulder and the crank, and the eccentric mass block includes a mating part that mates with the first stepped surface.

[0013] In some implementations...

[0014] The mating portion of the eccentric mass block, the first stepped surface, the moving disc bearing seat, and the crankshaft form at least a portion of the structure of a shoulder oil sump, which can store lubricating oil so that when the compressor is started, the lubricating oil in the shoulder oil sump can be pumped to the pump body to supply oil to it.

[0015] In some implementations...

[0016] The eccentric mass block also includes a connecting portion located on the outer periphery of the shaft shoulder, the connecting portion being fastened to the shaft shoulder by fasteners; the mating portion is connected to the connecting portion and forms a second stepped surface between the two, the second stepped surface being fitted to the first stepped surface, and in the longitudinal section and in the direction perpendicular to the crankshaft axis, the inner circumferential dimension of the mating portion is smaller than the inner circumferential dimension of the connecting portion.

[0017] In some implementations...

[0018] The shaft end of the moving disc bearing housing is spaced a first preset distance from the first stepped surface, such that at least a portion of the structure of the shoulder oil sump is located between the shaft end of the moving disc bearing housing and the first stepped surface.

[0019] In some implementations...

[0020] It also includes a bearing, which is sleeved on the outer periphery of the crank and located on the inner periphery of the moving disc bearing seat. The lower end of the bearing is also spaced a second preset distance from the first stepped surface. At least a portion of the structure of the shoulder oil sump is located between the shaft end of the bearing and the first stepped surface.

[0021] The present invention also provides a scroll compressor, which includes the aforementioned pump body assembly.

[0022] The present invention also provides an air conditioner comprising the aforementioned scroll compressor.

[0023] The pump assembly, scroll compressor, and air conditioner provided by this invention have the following beneficial effects:

[0024] 1. This invention forms a shoulder at the junction of the crank and the crankshaft body, and an eccentric mass block is disposed at the shoulder and located on the outer periphery of the moving disc bearing housing. The center line of the outer periphery of the eccentric mass block is concentric with the center line of the crankshaft main shaft. This enables the eccentric mass block to have no oil churning power consumption inside the upper support oil sump, thus reducing the oil turbulence loss of the moving disc bearing housing, improving the energy efficiency of the compressor, and effectively solving the problem of eccentric oil churning in the moving disc bearing housing of existing scroll compressors, which leads to oil churning power loss.

[0025] 2. The present invention further utilizes an eccentric hole within the inner circumference of the eccentric mass block, into which the moving disc bearing seat is inserted. The centerline of the eccentric hole is concentric with the centerline of the crank, allowing a gap between the moving disc bearing seat and the eccentric hole, enabling relative movement between the moving disc bearing seat and the eccentric hole of the eccentric mass block. Furthermore, the present invention uses the fact that the center of mass of both the eccentric mass block and the moving disc are located on the central axis X, and that the center of mass of the eccentric mass block and the moving disc are located on opposite sides of the central axis Y, which balances the moving disc and reduces the height and size of the first and second balance blocks at the lower part of the upper bracket, thereby reducing the wind resistance loss of the first and second balance blocks in the upper and lower cavities of the motor, further improving the energy efficiency of the compressor.

[0026] 3. In this invention, the width of the crankshaft shoulder is larger than the width of the crank, thereby forming a first stepped surface. Combined with an eccentric mass block, which has a mating part that mates with the first stepped surface, the mating part of the eccentric mass block, the first stepped surface, and the crank form at least a partial structure of the shoulder oil sump. This allows the shoulder oil sump to store lubricating oil, so that when the compressor is started, the lubricating oil in the shoulder oil sump can be pumped to the pump body to supply oil. This enables rapid oil supply to the pump body's back pressure chamber, reducing the risk of oil shortage and wear of the pump body during startup. It effectively solves the problem that during the startup of a scroll compressor, the compressor pump body oil supply system is not balanced, leading to oil shortage and wear of the moving and stationary discs, which causes compressor failure during startup. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the overall structure of the scroll compressor of the present invention;

[0028] Figure 2 This is a partially enlarged view of the pump body assembly in the scroll compressor of the present invention;

[0029] Figure 3This is a structural diagram of the crankshaft assembly in the scroll compressor of the present invention;

[0030] Figure 4 yes Figure 3 AA sectional view.

[0031] The reference numerals in the attached figures are as follows:

[0032] 1. Stationary plate; 2. Moving plate; 21. Moving plate base plate; 3. Upper bracket; 4. Motor; 5. Housing; 6. Lower cover; 7. Oil pump; 8. Lower bracket; 9. Lower support ring; 10. Motor rotor; 11. First balance block; 12. Cross slip ring; 13. Upper cover; 14. Intake pipe; 15. Eccentric mass block; 151. Second step surface; 152. Eccentric hole; 158. Mating part; 159. Connecting part; 16. Crankshaft; 160. Main shaft centerline; 161. Shoulder; 162. Crank; 163. Crank centerline; 17. Bearing; 18. Fastener; 19. Second balance block; 100. First step surface; 200. Shoulder oil sump; 201. Moving plate bearing seat; 300. Upper bracket oil sump; 302. Back pressure chamber. 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 some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0037] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0038] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0039] like Figure 1-4As shown, the present invention provides a pump body assembly, which includes:

[0040] The system comprises a moving disk 2 (moving scroll), a crankshaft 16, and an eccentric mass block 15. The crankshaft 16 includes a crankshaft body and a crank 162. The crank 162 is located at the axial end of the crankshaft body, and a shoulder 161 is formed at the junction of the crank 162 and the crankshaft body.

[0041] The moving disk 2 includes a moving disk bearing seat 201. At least a portion of the shaft segment of the moving disk bearing seat 201 is sleeved on the outer periphery of the crank 162 so that the moving disk 2 can be moved by driving the moving disk bearing seat 201 through the crank 162. The eccentric mass block 15 is disposed at the shoulder 161 and located on the outer periphery of the moving disk bearing seat 201. The center line of the outer periphery of the eccentric mass block 15 is concentric with the main shaft center line 160 of the crankshaft 16.

[0042] This invention forms a shoulder at the junction of the crank and the crankshaft body, and an eccentric mass block is disposed at the shoulder and located on the outer periphery of the moving disc bearing housing. The center line of the outer periphery of the eccentric mass block is concentric with the center line of the crankshaft main shaft. This allows the eccentric mass block to have no oil churning power consumption inside the upper support oil sump, thus reducing the oil turbulence loss of the moving disc bearing housing, improving the energy efficiency of the compressor, and effectively solving the problem of eccentric oil churning in the moving disc bearing housing of existing scroll compressors, which leads to oil churning power loss.

[0043] In some implementations...

[0044] The inner circumference of the eccentric mass block 15 is an eccentric hole 152. The moving disc bearing seat 201 is inserted into the eccentric hole 152. The center line of the eccentric hole 152 is concentric with the crank center line 163 of the crank 162. The moving disc bearing seat 201 and the eccentric hole of the eccentric mass block 15 can move relative to each other.

[0045] The present invention further utilizes the inner circumference of the eccentric mass block as an eccentric hole, and the moving disc bearing seat is inserted into the eccentric hole. The center line of the eccentric hole is concentric with the center line of the crank, which allows the moving disc bearing seat and the eccentric hole to have a gap, so that the moving disc bearing seat and the eccentric hole of the eccentric mass block can move relative to each other.

[0046] In some implementations...

[0047] In the axial projection plane, the spindle centerline 160 and the crank centerline 163 of the crank 162 are separated by an eccentricity e, and the line connecting the two forms the central axis X. A central axis Y is perpendicular to the central axis X at the spindle centerline 160. The center of mass of the eccentric mass block 15 and the center of mass of the moving disk 2 are both located on the central axis X, and the center of mass of the eccentric mass block 15 and the center of mass of the moving disk 2 are located on both sides of the central axis Y.

[0048] The present invention further balances the moving disk by having the center of mass of the eccentric mass block and the center of mass of the moving disk both located on the central axis X, and the center of mass of the eccentric mass block and the center of mass of the moving disk located on opposite sides of the central axis Y. This balances the moving disk and reduces the height and size of the first and second balance blocks at the lower part of the upper bracket, thereby reducing the wind resistance loss of the first and second balance blocks in the upper and lower cavities of the motor and further improving the energy efficiency of the compressor.

[0049] To address the oil churning loss problem in existing moving disc bearing housings, this invention proposes a scroll compressor. An eccentric mass block is fixed to the crankshaft shoulder of the compressor. The outer circumference of this eccentric mass block is concentric with the center of the main shaft, and it has an eccentric hole concentric with the crankshaft crank. The moving disc bearing housing is embedded in this eccentric hole, with a gap between the moving disc bearing housing and the eccentric hole, allowing for relative movement. Since the outer circumference of the eccentric mass block is concentric with the crankshaft main shaft, theoretically, this eccentric mass block consumes no oil churning power within the upper support oil sump, thus reducing the oil churning loss of the moving disc bearing housing and improving the compressor's energy efficiency. Simultaneously, the eccentric mass block, built into the upper support oil sump, balances the moving disc, reducing the height and size of the first and second balancing blocks in the lower part of the upper support. This reduces the wind resistance loss of the first and second balancing blocks in the upper and lower cavities of the motor, further improving the compressor's energy efficiency.

[0050] During compressor operation, lubricating oil is stored in the oil sump 300 of the upper support. Since the moving disc bearing seat 201 is inserted into the eccentric hole 152 of the eccentric mass block 15, and the outer circle of the eccentric mass block 15 is concentric with the crankshaft 16, theoretically, the crank oil churning loss is zero, thus greatly reducing the oil churning loss. At the same time, the center of mass of the eccentric mass block 15 and the center of mass of the moving disc 2 should theoretically be on the central axis X. The center of mass of the eccentric mass block 15 and the center of mass of the moving disc 2 are distributed on both sides of the central axis Y. Therefore, the eccentric mass block 15 can balance part of the torque of the moving disc 2, thus reducing the size of the first balance block 11 and the second balance block 19. In this way, the air resistance of the first and second balance blocks in the upper and lower cavities of the motor 4 is reduced accordingly, thereby improving the overall energy efficiency of the compressor.

[0051] This invention can solve the following technical problems:

[0052] 1. The outer circle of the eccentric mass block is concentric with the center of the main shaft, which theoretically eliminates oil disturbance and power consumption, thus solving the problem of oil churning loss.

[0053] 2. The eccentric mass block can balance the moving disk, thus reducing the size of the first and second balancing blocks and reducing wind resistance loss.

[0054] In some implementations...

[0055] In the longitudinal section, the width of the shoulder 161 in the direction perpendicular to the central axis of the crankshaft 16 is greater than the width of the crank 162 in that direction, so as to form a first stepped surface 100 at the junction of the shoulder 161 and the crank 162, and the eccentric mass block 15 includes a mating part 158 ​​that mates with the first stepped surface 100.

[0056] This invention forms a shoulder at the junction of the crank and the crankshaft body, with the shoulder being wider than the crank, thus creating a first stepped surface. Combined with an eccentric mass block having a mating part that engages with the first stepped surface and the shoulder, this effectively forms an oil-blocking structure on the outer periphery of the moving disc bearing housing. This effectively prevents the eccentric mass block from churning oil and consuming power inside the upper support oil sump, reducing oil turbulence losses in the moving disc bearing housing and improving the compressor's energy efficiency.

[0057] In some implementations...

[0058] The mating portion 158 of the eccentric mass block 15, the first stepped surface 100, and the crank 162 form at least a portion of the structure of the shoulder oil sump 200, which can store lubricating oil so that when the compressor is started, the lubricating oil in the shoulder oil sump 200 can be pumped to the pump body to supply oil to it.

[0059] The mating portion of the eccentric mass block, the first stepped surface, and the crank of the present invention form at least a partial structure of a shoulder oil sump, which allows the shoulder oil sump to store lubricating oil. This allows the lubricating oil in the shoulder oil sump to be pumped to the pump body to supply oil when the compressor is started, enabling rapid oil supply to the pump body back pressure chamber. This reduces the risk of oil shortage and wear of the pump body during startup and effectively solves the problem that during the startup of a scroll compressor, the oil supply system of the compressor pump body is not balanced, leading to oil shortage and wear of the moving and stationary discs, which in turn causes compressor failure during startup.

[0060] In some implementations...

[0061] The eccentric mass block 15 also includes a connecting portion 159 located on the outer periphery of the shoulder 161. The connecting portion 159 is fastened to the shoulder 161 by fasteners 18 (preferably screws, bolts, or other threaded fasteners). The mating portion 158 is connected to the connecting portion 159 and forms a second stepped surface 151 between them. The second stepped surface 151 is fitted to the first stepped surface 100. In the longitudinal section and in the direction perpendicular to the axis of the crankshaft 16, the inner circumferential dimension of the mating portion 158 is smaller than the inner circumferential dimension of the connecting portion 159.

[0062] This is a preferred structural form of the eccentric mass block of the present invention. The connecting part is located on the outer periphery of the shaft shoulder and is fixed to the shaft shoulder by fasteners. It can rotate as a whole with the crankshaft. The second step surface formed by the mating part and the connecting part fits into the first step surface of the shaft shoulder, which can form an effective seal at the outer periphery of the shaft shoulder oil pool, ensuring that a certain amount of oil can be stored in the shaft shoulder oil pool and preventing leakage from the outer periphery. The inner periphery size of the mating part is larger than the inner periphery size of the connecting part, which can effectively form the second step surface.

[0063] In some implementations...

[0064] The shaft end of the moving disc bearing seat 201 is spaced apart from the first stepped surface 100 by a first preset distance, such that at least a portion of the structure of the shoulder oil sump 200 is located between the shaft end of the moving disc bearing seat 201 and the first stepped surface 100.

[0065] The movable disc bearing housing of the present invention is sleeved on the outer periphery of the crank and can be driven by the crank to move, thereby completing the function of compressing refrigerant. The shaft end (preferably the lower end) of the movable disc bearing housing is spaced apart from the first stepped surface of the crankshaft shoulder by a first preset distance, which allows at least a part of the structure of the shoulder oil sump to be located at the lower end of the movable disc bearing housing. While increasing the area of ​​the shoulder oil sump, it can also supply oil to the shoulder through the movable disc bearing housing, thus playing the role of oil supply.

[0066] In some implementations...

[0067] It also includes a bearing 17, which is sleeved on the outer periphery of the crank 162 and located on the inner periphery of the moving disc bearing seat 201 (preferably a sliding bearing, cold-pressed inside the moving disc bearing seat). The lower end of the bearing 17 is also spaced a second preset distance from the first stepped surface 100. At least a portion of the structure of the shoulder oil sump 200 is located between the shaft end of the moving disc bearing seat 201 and the first stepped surface 100.

[0068] The present invention further utilizes the bearing structure to ensure that while supporting the crank and moving disc bearing housing, it can also increase the range and area of ​​the shoulder oil sump at the lower end of the bearing, and provide an oil supply channel at the bearing to communicate with the shoulder oil sump, thereby serving the function of oil supply.

[0069] In some implementations...

[0070] The moving disk 2 includes a moving disk base plate 21. The moving disk bearing seat 201 is located at one axial end of the center of the moving disk base plate 21 and extends away from the moving disk base plate 21. One axial end of the crank 162 is opposite to the moving disk base plate 21 and is spaced apart from the moving disk base plate 21 by a third preset distance, forming an oil supply channel one. An oil supply channel two is spaced between the outer periphery of the crank 162 and the inner periphery of the bearing 17. The crankshaft 16 has a central oil hole inside. The central oil hole is connected to the shoulder oil sump 200 through the oil supply channel one and the oil supply channel two in sequence to provide lubricating oil to the shoulder oil sump 200.

[0071] The present invention also allows the moving disk base plate to be connected to the moving disk bearing seat at its lower end, and an oil supply channel one is formed between the axial end (i.e., its upper end) of the crank and the moving disk base plate, which can communicate with the central oil hole to introduce oil from the central oil hole. The oil supply channel two formed between the outer circumference of the crank and the inner circumference of the bearing can communicate with the oil supply channel one, thereby forming a sequentially connected oil supply circuit to achieve the function and effect of supplying oil to the shoulder oil sump.

[0072] The present invention also provides a scroll compressor, which includes the aforementioned pump body assembly.

[0073] In this invention, the outer circle of the eccentric mass block of the scroll compressor is concentric with the crankshaft main shaft. Theoretically, this eccentric mass block consumes no oil churning power within the upper support oil sump, thus reducing oil turbulence loss in the moving disc bearing housing and improving the compressor's energy efficiency. Simultaneously, the eccentric mass block, built into the upper support oil sump, balances the moving disc, reducing the height and size of the first and second balance blocks at the lower part of the upper support. This reduces the wind resistance loss of the first and second balance blocks in the upper and lower chambers of the motor, thereby improving the compressor's energy efficiency.

[0074] This invention proposes a scroll compressor in which an eccentric mass block is fixed on the crankshaft shoulder. The outer circle of the eccentric mass block is concentric with the center of the main shaft, and an eccentric hole is provided inside. The eccentric hole is concentric with the crankshaft crank. The moving disc bearing seat is embedded in the eccentric hole, and there is a gap between the moving disc bearing seat and the eccentric hole. A certain amount of lubricating oil is stored at the bottom of the eccentric mass block. When the compressor is started, the lubricating oil at the bottom can quickly supply oil to the pump body to ensure that the compressor can start up safely and stably.

[0075] like Figure 1As shown, the scroll compressor of the present invention mainly consists of a motor 4, an upper bracket 3, a lower bracket 8, a stationary disk 1 (stationary scroll), a moving disk 2 (moving scroll), a cross slip ring 12, and a crankshaft 16. The motor 4 is fixed to the housing 5 by a heat-shrink fitting, and the upper bracket 3 is fixed to the housing 5 by spot welding. The moving disk 2 and the stationary disk 1 are mounted opposite each other on the upper bracket 3 with a phase angle difference of 180 degrees. The moving disk 2 moves under the drive of the crankshaft 16, meshing with the stationary disk 1 to form a series of mutually isolated crescent-shaped sealed cavities with continuously changing volumes. The stationary disk 1 is fixed to the upper bracket 3 by screw fasteners. The lower bracket 8 is fixed to the lower support ring 9 by screws, and the lower support ring 9 is then fixed to the housing 5 by spot welding.

[0076] When the compressor is running, the motor 4 drives the crankshaft 16 to rotate. The crank of the crankshaft 16 drives the moving disk 2 to move. Under the anti-rotation restriction of the cross slip ring 12, the moving disk 2 performs translational motion around the center of the crankshaft 16 with a fixed radius e. The refrigerant entering from the suction pipe 14 is drawn into the crescent-shaped suction chamber formed by the moving disk 2 and the stationary disk 1. After being compressed, it is discharged from the exhaust hole of the stationary disk 1 and enters the cavity between the upper cover 13 and the stationary disk 1. Then, it enters the cavity between the upper support 3 and the motor 4 through the exhaust groove of the stationary disk 1 and the upper bracket 3. Part of it enters the lower end of the motor 4 through the flow groove between the motor 4 and the housing 5. Finally, the high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0077] like Figure 2 This is a partial structural schematic diagram of the present invention. The second step surface 151 of the eccentric mass block 15 is fixed on the shoulder 161 of the crankshaft 16, and then fixed by fasteners 18, as shown. Figure 3 As shown in the schematic diagram of the shaft assembly, the outer circle of the eccentric mass block 15 is concentric with the main shaft centerline 160 (i.e., the rotation center) of the crankshaft 16. The eccentric mass block 15 has an eccentric hole 152, the center of which is concentric with the crank centerline 163. Figure 4 A cross-sectional view of the moving disc bearing housing. The moving disc bearing housing 201 contains a cold-pressed sliding bearing (bearing 17), which is mounted on the crank 162. The moving disc bearing housing 201 is housed within the eccentric hole 152 of the eccentric mass block 15, with a gap between the housing and the hole. Because the center of the eccentric hole 152 is concentric with the crank centerline 163, the moving disc bearing housing 201 and the eccentric hole of the eccentric mass block 15 can move relative to each other.

[0078] During compressor operation, lubricating oil is stored in the oil sump 300 of the upper support. Since the moving disc bearing seat 201 is inserted into the eccentric hole 152 of the eccentric mass block 15, and the outer circle of the eccentric mass block 15 is concentric with the crankshaft 16, theoretically, the crank oil churning loss is zero, thus greatly reducing the oil churning loss. At the same time, the center of mass of the eccentric mass block 15 and the center of mass of the moving disc 2 should theoretically be on the central axis X. The center of mass of the eccentric mass block 15 and the center of mass of the moving disc 2 are distributed on both sides of the central axis Y. Therefore, the eccentric mass block 15 can balance part of the torque of the moving disc 2, thus reducing the size of the first balance block 11 and the second balance block 19. In this way, the air resistance of the first and second balance blocks in the upper and lower cavities of the motor 4 is reduced accordingly, thereby improving the overall energy efficiency of the compressor.

[0079] The present invention also provides an air conditioner comprising the aforementioned scroll compressor.

[0080] This invention proposes a scroll compressor in which a circular eccentric mass block is fixed on the crankshaft shoulder. The outer circle of the eccentric mass block is concentric with the center of the main shaft, and an eccentric hole is provided inside. The eccentric hole is concentric with the crankshaft and crank. The moving disc bearing seat is embedded in the eccentric hole, and there is a gap between the moving disc bearing seat and the eccentric hole, allowing relative movement.

[0081] To address the problem of wear caused by insufficient oil in the moving and stationary bearing plates during compressor startup, this invention proposes a scroll compressor. An eccentric mass block is fixed to the crankshaft shoulder of the compressor. The outer circumference of this eccentric mass block is concentric with the center of the main shaft, and it has an eccentric hole concentric with the crankshaft crank. The moving bearing plate bearing seat is embedded in this eccentric hole, with a gap between the bearing seat and the hole. A certain amount of lubricating oil is stored at the bottom of the eccentric mass block. When the compressor starts, the lubricating oil at the bottom can quickly supply oil to the pump body, ensuring safe and stable compressor startup. Simultaneously, this eccentric mass block also reduces oil churning losses caused by the eccentric movement of the moving bearing plate bearing seat within the upper support oil sump, thereby improving the compressor's energy efficiency.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pump body assembly, characterized in that: include: The moving disc (2), crankshaft (16) and eccentric mass block (15) are provided. The crankshaft (16) includes a crankshaft body and a crank (162). The crank (162) is located at the axial end of the crankshaft body, and a shoulder (161) is formed at the junction of the crank (162) and the crankshaft body. The moving disk (2) includes a moving disk bearing housing (201), at least a portion of the shaft segment of the moving disk bearing housing (201) is sleeved on the outer periphery of the crank (162) so as to drive the moving disk (2) to move by driving the moving disk bearing housing (201) through the crank (162). The eccentric mass block (15) is disposed at the shoulder (161) and located on the outer periphery of the moving disk bearing housing (201). The center line of the outer periphery of the eccentric mass block (15) is concentric with the main shaft center line (160) of the crankshaft (16). The inner circumference of the eccentric mass block (15) is an eccentric hole (152), and the moving disc bearing seat (201) is inserted into the eccentric hole (152). The center line of the eccentric hole (152) is concentric with the crank center line (163) of the crank (162). The moving disc bearing seat (201) and the eccentric hole (152) of the eccentric mass block (15) can move relative to each other. In the longitudinal section, the shoulder (161) is wider in the direction perpendicular to the central axis of the crankshaft (16) than the crank (162) in that direction, so as to form a first stepped surface (100) at the junction of the shoulder (161) and the crank (162), and the eccentric mass block (15) includes a mating part (158) that mates with the first stepped surface (100). The mating part (158) of the eccentric mass block (15), the first stepped surface (100) and the crank (162) form at least a part of the structure of the shoulder oil sump (200), which can store lubricating oil so that when the compressor is started, the lubricating oil in the shoulder oil sump (200) can be pumped to the pump body to supply oil to it. The eccentric mass block (15) also includes a connecting part (159) located on the outer periphery of the shoulder (161), the connecting part (159) being fastened to the shoulder (161) by fasteners (18); the mating part (158) is connected to the connecting part (159) and a second step surface (151) is formed between them, the second step surface (151) is fitted to the first step surface (100), and in the longitudinal section and in the direction perpendicular to the axis of the crankshaft (16), the inner circumferential dimension of the mating part (158) is smaller than the inner circumferential dimension of the connecting part (159).

2. The pump body assembly according to claim 1, characterized in that: In the axial projection plane, the spindle centerline (160) and the crank centerline (163) are separated by an eccentricity e, and the line connecting the two forms the central axis X. A central axis Y is perpendicular to the central axis X at the spindle centerline (160). The center of mass of the eccentric mass block (15) and the center of mass of the moving disk (2) are both located on the central axis X, and the center of mass of the eccentric mass block (15) and the center of mass of the moving disk (2) are located on both sides of the central axis Y.

3. The pump body assembly according to claim 1, characterized in that: The shaft end of the moving disc bearing housing (201) is spaced apart from the first stepped surface (100) by a first preset distance, such that at least a portion of the structure of the shoulder oil sump (200) is located between the shaft end of the moving disc bearing housing (201) and the first stepped surface (100).

4. The pump body assembly according to claim 1, characterized in that: It also includes a bearing (17), which is sleeved on the outer periphery of the crank (162) and located on the inner periphery of the moving disc bearing seat (201). The lower end of the bearing (17) is also spaced a second preset distance from the first stepped surface (100). At least part of the structure of the shoulder oil sump (200) is located between the shaft end of the bearing (17) and the first stepped surface (100).

5. A scroll compressor, characterized in that: Includes the pump body assembly according to any one of claims 1-4.

6. An air conditioner, characterized in that: Including the scroll compressor as described in claim 5.

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