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 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 shoulder being formed at the joint of the crank and the crankshaft body, in a longitudinal section, the width of the shoulder in a direction perpendicular to the central axis of the crankshaft is greater than the width of the crank in the direction, so as to form a first step surface at the joint of the shoulder and the crank, the eccentric mass comprising a matching part matched with the first step surface, so that the matching part of the eccentric mass, the first step surface and the crank enclose at least part of the structure of the shoulder oil pool, the shoulder oil pool can store lubricating oil, so that when the compressor is started, the lubricating oil in the shoulder oil pool can be pumped to the pump body to supply oil. According to the application, the oil can be quickly supplied to the back pressure chamber of the pump body, so as to reduce the risk of oil shortage wear of the pump body during start-up, and solve the problem of failure of the scroll compressor during start-up.

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. The moving and stationary scroll plates are the core components of a scroll compressor, and the lubrication of these plates and the pump body is a key factor affecting compressor reliability. Especially during the initial startup phase, the compressor's pump body oil supply system is not yet balanced, which can easily lead to insufficient oil supply and wear of the moving and stationary scroll plates, causing compressor malfunctions during startup.

[0003] Because existing scroll compressors suffer from technical problems such as the compressor pump body oil supply system not reaching balance during startup, leading to insufficient oil and wear of the moving and stationary discs, which in turn causes compressor malfunctions during startup, this 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 of the existing scroll compressor in which the compressor pump body oil supply system is not balanced during the start-up period, resulting in insufficient oil and wear of the moving and stationary plates, thereby causing the compressor to fail during the start-up period. The present invention provides 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] A crankshaft and an eccentric mass block, the crankshaft including a crankshaft body and a crank, the crank being located at the axial end of the crankshaft body, and a shoulder being formed at the junction of the crank and the crankshaft body, wherein in a longitudinal section, the width of the shoulder in a 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, the eccentric mass block including a mating portion that mates with the first stepped surface, such that the mating portion of the eccentric mass block, the first stepped surface, and the crank form at least a portion of the structure of a shoulder oil reservoir, the shoulder oil reservoir being capable of storing lubricating oil, such that when the compressor is started, the lubricating oil in the shoulder oil reservoir can be pumped to the pump body for oil supply.

[0007] In some implementations...

[0008] 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.

[0009] In some implementations...

[0010] It also includes a movable disc, which includes a movable disc bearing housing. At least a portion of the shaft segment of the movable disc bearing housing is sleeved on the outer periphery of the crank, so that the movable disc is driven to move by the crank driving the movable disc bearing housing. The shaft end of the movable disc bearing housing is spaced apart from the first stepped surface by a first preset distance, such that at least a portion of the structure of the shoulder oil sump is located between the shaft end of the movable disc bearing housing and the first stepped surface.

[0011] In some implementations...

[0012] 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 housing. 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 moving disc bearing housing and the first stepped surface.

[0013] In some implementations...

[0014] The moving disk includes a moving disk base plate. The moving disk bearing seat is located at one axial end of the center of the moving disk base plate and extends away from the moving disk base plate. One axial end of the crank is opposite to the moving disk base plate and is spaced apart from the moving disk base plate by a third preset distance to form an oil supply channel one. An oil supply channel two is provided between the outer periphery of the crank and the inner periphery of the bearing. The crankshaft has a central oil hole inside. The central oil hole is connected to the shoulder oil sump through the oil supply channel one and the oil supply channel two in sequence to provide lubricating oil to the shoulder oil sump.

[0015] In some implementations...

[0016] The interior of the moving disc bearing housing is also provided with a moving disc oil hole. The moving disc includes a moving disc base plate. The moving disc bearing housing is connected to one axial end of the moving disc base plate and extends axially away from the moving disc bearing housing. There is a gap between the axial end of the eccentric mass block facing the moving disc base plate and the moving disc base plate. One end of the moving disc oil hole is connected to the shoulder oil sump, and the other end is connected to the gap between the eccentric mass block and the moving disc base plate, thereby supplying oil to the pump body.

[0017] In some implementations...

[0018] The moving plate oil hole includes a moving plate oil hole one and a moving plate oil hole two. The lower end of the moving plate oil hole one is located at the bottom end of the moving plate bearing seat and communicates with the shoulder oil sump. The upper end of the moving plate oil hole one extends to communicate with the moving plate oil hole two. The moving plate oil hole two extends to the outer periphery of the moving plate bearing seat and communicates with the gap.

[0019] In some implementations...

[0020] The eccentric mass block is provided with oil delivery channel one, oil delivery channel two and oil delivery channel three. One end of oil delivery channel one is located on the radial inner circumference of the eccentric mass block and communicates with the shoulder oil sump, and the other end extends toward the interior of the eccentric mass block. The lower end of oil delivery channel two communicates with oil delivery channel one and the upper end of oil delivery channel two communicates with oil delivery channel three. An oil delivery channel four is formed between the upper end of the eccentric mass block (15) and the moving disk base plate. The oil in the shoulder oil sump can sequentially supply oil to the pump body through oil delivery channel one, oil delivery channel two, oil delivery channel three and oil delivery channel four.

[0021] In some implementations...

[0022] The first oil delivery channel is opposite to the shoulder oil sump in the height direction, the second oil delivery channel is located inside the eccentric mass block and extends along the axial direction of the crankshaft, and the third oil delivery channel is located at the upper end of the eccentric mass block and extends into an arc-shaped groove structure on the upper end face.

[0023] In some implementations...

[0024] It also includes an upper support, an eccentric hole formed on the inner circumference of the eccentric mass block, an oil drain channel one formed between the eccentric hole and the outer circumference of the moving disc bearing seat, an oil return hole formed through the inner and outer circumferences of the eccentric mass block to form an oil drain channel two, an upper support oil sump on the inner circumference of the upper support, an oil drain channel three formed between the upper support oil sump and the outer circumference of the eccentric mass block, an upper support oil return hole formed through the inner and outer circumferences of the upper support to form an oil drain channel four, and the shoulder oil sump discharges oil to the outside of the upper support in sequence through the oil drain channel one, the oil drain channel two, the oil drain channel three and the oil drain channel four.

[0025] In some implementations...

[0026] Within the projection plane of the axial end face, the first oil drain channel is an annular channel, the second oil drain channel is a channel extending from the radial inner circumference of the eccentric mass block to the radial outer circumference for a predetermined length of one, and the lower end of the second oil drain channel is higher than the upper end of the shoulder oil sump, and the fourth oil drain channel is a channel extending from the radial inner circumference of the upper bracket to the radial outer circumference for a predetermined length of two. The second oil drain channel and the fourth oil drain channel do not coincide in position within the axial projection plane.

[0027] In some implementations...

[0028] The center line of the outer periphery of the eccentric mass block is concentric with the center line of the crankshaft's main shaft. The inner periphery of the eccentric mass block is an eccentric hole, and the center line of the eccentric hole is concentric with the center line of the crank. The moving disc bearing seat and the eccentric hole of the eccentric mass block can move relative to each other.

[0029] The present invention also provides a scroll compressor, which includes the aforementioned pump body assembly.

[0030] The present invention also provides an air conditioner comprising the aforementioned scroll compressor.

[0031] The pump assembly, scroll compressor, and air conditioner provided by this invention have the following beneficial effects:

[0032] 1. 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, the mating part of the eccentric mass block, the first stepped surface, and the crank form at least part of a shoulder oil reservoir structure. This allows the shoulder oil reservoir to store lubricating oil, enabling it to be pumped to the pump body when the compressor is started. This rapid oil supply to the pump body's back pressure chamber reduces the risk of oil shortage and wear during startup, effectively solving the problem of compressor pump body oil supply system imbalance during startup, leading to oil shortage and wear of the moving and stationary discs, and causing compressor malfunctions during startup.

[0033] 2. The present invention also sets the outer circle of the eccentric mass block to be concentric with the crankshaft main shaft, which theoretically enables the eccentric mass block to have no oil churning power consumption inside the upper support oil sump, reducing the oil churning loss of the crank and the oil disturbance loss of the moving disc bearing seat, and effectively improving the energy efficiency of the compressor; the present invention further optimizes the center of the eccentric hole of the eccentric mass block to be concentric with the center line of the crank, which enables the moving disc bearing seat and the eccentric hole of the eccentric mass block to move relative to each other. Attached Figure Description

[0034] Figure 1 This is a cross-sectional view of the overall structure of the scroll compressor of the present invention;

[0035] Figure 2 This is a partially enlarged view of the pump body assembly in the scroll compressor of Embodiment 1 of the present invention;

[0036] Figure 3 This is an oil circuit diagram of the pump body assembly in the scroll compressor of Embodiment 1 of the present invention;

[0037] Figure 4 yes Figure 3 A magnified view of part A;

[0038] Figure 5 yes Figure 4 A schematic diagram of section B;

[0039] Figure 6 This is a longitudinal sectional view of the moving disk in Embodiment 1 of the present invention;

[0040] Figure 7 This is a three-dimensional structural diagram of the eccentric mass block according to Embodiment 1 of the present invention;

[0041] Figure 8 This is a partially enlarged view of the pump body assembly in the scroll compressor of Embodiment 2 of the present invention;

[0042] Figure 9 This is an oil circuit diagram of the pump body assembly in the scroll compressor of Embodiment 2 of the present invention;

[0043] Figure 10 This is a three-dimensional structural diagram of the eccentric mass block in Embodiment 2 of the present invention.

[0044] The reference numerals in the attached figures are as follows:

[0045] 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. Suction pipe; 15. Eccentric mass block; 151. Second step surface; 152. Eccentric hole; 153. Oil return hole; 154. Oil delivery channel three; 155. Oil delivery channel two; 157. Oil delivery channel one; 158. Mating part; 159. Connecting part; 16. Crankshaft; 160. Main shaft centerline; 161. Shoulder; 162. Crank; 163. Center oil hole; 164. Crank center; 165. Main shaft outer circle; 17. Sealing ring; 18. Bearing; 100. First step surface; 200. Shoulder oil sump; 201. Moving plate bearing seat; 202. Moving plate oil hole one; 203. Moving plate oil hole two; 300. Upper support oil sump; 301. Upper support oil return hole; 302. Back pressure chamber; 400. Fastener; 500. Oil supply channel one; 600. Oil supply channel two. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] like Figure 1-10 As shown, the present invention provides a pump body assembly, which includes:

[0053] The crankshaft 16 and the 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. In a 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. The eccentric mass block 15 includes a mating part 158 ​​that mates with the first stepped surface 100, such that the mating part 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 a shoulder oil sump 200. The shoulder oil sump 200 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 for oil supply.

[0054] This invention forms a shoulder at the junction of the crank and 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, the mating part of the eccentric mass block, the first stepped surface, and the crank form at least part of a shoulder oil reservoir structure. This allows the shoulder oil reservoir to store lubricating oil, enabling it to be pumped to the pump body when the compressor is started. This rapid oil supply to the pump body's back pressure chamber reduces the risk of oil shortage and wear during startup, effectively solving the problem of compressor pump body oil supply system imbalance during startup, leading to oil shortage and wear of the moving and stationary discs, and causing compressor malfunctions during startup.

[0055] In some implementations...

[0056] 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 a fastener 400 (preferably a screw, bolt, or other threaded fastener). 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.

[0057] 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.

[0058] In some implementations...

[0059] It also includes a movable disk 2, which includes a movable disk bearing seat 201. At least a portion of the shaft segment of the movable disk bearing seat 201 is sleeved on the outer periphery of the crank 162 so that the movable disk 2 can be moved by driving the movable disk bearing seat 201 through the crank 162. The shaft end of the movable disk 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 movable disk bearing seat 201 and the first stepped surface 100.

[0060] The present invention further preferably has the moving disc bearing housing sleeved on the outer periphery of the crank, which can be driven by the crank to move and thus complete the function of compressing refrigerant. The shaft end (preferably the lower end) of the moving 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 moving disc bearing housing. While increasing the area of ​​the shoulder oil sump, it can also supply oil to the shoulder through the moving disc bearing housing, thus playing the role of oil supply.

[0061] In some implementations...

[0062] It also includes a bearing 18, 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 18 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.

[0063] The present invention further utilizes the structure of the bearing 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.

[0064] In some implementations...

[0065] 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 500. An oil supply channel 600 is provided between the outer periphery of the crank 162 and the inner periphery of the bearing 18. The crankshaft 16 has a central oil hole 163 inside. The central oil hole 163 is connected to the shoulder oil sump 200 through the oil supply channel 500 and the oil supply channel 600 in sequence to provide lubricating oil to the shoulder oil sump 200.

[0066] 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.

[0067] Example 1, as Figure 2-7 In some implementation methods,

[0068] The interior of the moving disc bearing seat 201 is also provided with a moving disc oil hole. The moving disc 2 includes a moving disc base plate 21. The moving disc bearing seat 201 is connected to one axial end of the moving disc base plate 21 and extends axially away from the moving disc bearing seat 201. There is a gap between the axial end of the eccentric mass block 15 facing the moving disc base plate 21 and the moving disc base plate 21. One end of the moving disc oil hole is connected to the shoulder oil sump 200, and the other end is connected to the gap between the eccentric mass block 15 and the moving disc base plate 21, thereby supplying oil to the pump body.

[0069] The present invention utilizes the oil hole of the moving disc inside the moving disc bearing seat to form a communication with the oil sump of the shaft shoulder. The other end of the oil hole of the moving disc is connected to the gap between the eccentric mass block and the moving disc base plate, so as to supply oil to the pump body, preferably the back pressure chamber of the pump body, so as to achieve the effect of rapidly supplying oil to the back pressure chamber of the pump body when the compressor starts, thereby reducing the risk of oil shortage and wear of the pump body during startup.

[0070] In some implementations...

[0071] The moving plate oil hole includes a first moving plate oil hole 202 and a second moving plate oil hole 203. The lower end of the first moving plate oil hole 202 is located at the bottom end of the moving plate bearing seat 201 and communicates with the shoulder oil sump 200. The upper end of the first moving plate oil hole 202 extends to communicate with the second moving plate oil hole 203. The second moving plate oil hole 203 extends to the outer periphery of the moving plate bearing seat 201 and communicates with the gap.

[0072] This is a preferred structural form of the moving plate oil hole of the present invention, which includes moving plate oil hole one and two. Moving plate oil hole one preferably extends in a vertical direction, with its lower end communicating with the shoulder oil sump and its upper end extending to the top of the moving plate bearing seat. Moving plate oil hole two preferably communicates with moving plate oil hole one, so as to guide the oil to the outside of the eccentric mass block and enter the back pressure chamber of the pump body, thereby achieving the effect of quickly supplying oil to the back pressure chamber of the pump body when the compressor starts.

[0073] Example 2, as Figure 8-10 In some implementation methods,

[0074] The eccentric mass block 15 is provided with an oil delivery channel 157, an oil delivery channel 155, and an oil delivery channel 154. One end of the oil delivery channel 157 is located on the radial inner circumference of the eccentric mass block 15 and communicates with the shoulder oil sump 200, while the other end extends toward the interior of the eccentric mass block 15. The lower end of the oil delivery channel 155 communicates with the oil delivery channel 157, and the upper end of the oil delivery channel 155 communicates with the oil delivery channel 154. An oil delivery channel 4 (not shown) is formed between the upper end of the eccentric mass block 15 and the moving disk base plate 21. The oil in the shoulder oil sump 200 can sequentially supply oil to the pump body through the oil delivery channel 157, the oil delivery channel 155, the oil delivery channel 154, and the oil delivery channel 4.

[0075] This is a preferred structural form of Embodiment 2 of the present invention. Through the oil delivery channels 1, 2 and 3 opened on the eccentric mass block, oil delivery channel 1 can be connected with the shoulder oil sump, oil delivery channel 2 can be extended in the vertical direction to be connected with oil delivery channel 1, and oil delivery channel 3 is provided at the upper end of the eccentric mass block to be connected with oil delivery channel 2. This forms oil delivery channels 1, 2, 3 and 4 connected in sequence, so as to supply oil to the pump body, preferably the back pressure chamber of the pump body, so as to achieve the effect of quickly supplying oil to the back pressure chamber of the pump body when the compressor starts, thereby reducing the risk of oil shortage and wear of the pump body during startup.

[0076] In some implementations...

[0077] The first oil channel 157 is opposite to the shoulder oil sump 200 in the height direction. The second oil channel 155 is located inside the eccentric mass block 15 and extends along the axial direction of the crankshaft 16. The third oil channel 154 is located at the upper end of the eccentric mass block 15 and extends into an arc-shaped groove structure on the upper end face.

[0078] This is the preferred structural form and position of the oil delivery channels one, two and three of the present invention. The oil delivery channel one is preferably opposite to the shoulder oil sump and can form a connection. The oil delivery channel preferably extends in the vertical direction. The oil delivery channel three is preferably formed in an arc-shaped groove structure on the upper end face of the eccentric mass block, which can increase the oil supply area and increase the oil supply to the pump body back pressure chamber.

[0079] like Figure 8-10 This is a partial structural diagram of Embodiment 2 of the present invention. The eccentric mass block 15 has an oil delivery channel 2 155 and an end-face oil groove (oil delivery channel 3 154) on its side wall. Lubricating oil from the oil pool at the bottom of the eccentric hole 152 of the eccentric mass block 15 is delivered to the oil delivery channel 3 154 through oil delivery channels 1 157 and 155. Under centrifugal force, it is sprayed onto the sealing ring 17 and then enters the back pressure chamber 302 for pump lubrication, ensuring the reliability of compressor start-up. Simultaneously, an oil return hole 153 is provided on the side of the eccentric mass block 15 for oil return.

[0080] In some implementations...

[0081] It also includes an upper support 3. An eccentric hole 152 is formed on the inner circumference of the eccentric mass block 15. An oil drain channel one is formed between the eccentric hole 152 and the outer circumference of the moving disc bearing seat 201. An oil return hole 153 is provided through the inner and outer circumferences of the eccentric mass block 15 to form an oil drain channel two. The inner circumference of the upper support 3 has an upper support oil sump 300. An oil drain channel three is formed between the upper support oil sump 300 and the outer circumference of the eccentric mass block 15. An upper support oil return hole 301 is provided through the inner and outer circumferences of the upper support 3 to form an oil drain channel four. The shoulder oil sump 200 discharges oil to the outside of the upper support 3 in sequence through the oil drain channel one, the oil drain channel two, the oil drain channel three and the oil drain channel four.

[0082] The present invention also preferably forms an oil drain channel one between the eccentric hole on the inner circumference of the eccentric mass block and the outer circumference of the moving disc bearing seat. The oil drain channel one is connected to the shoulder oil sump. An oil return hole is provided through the inner and outer circumferences of the eccentric mass block to form an oil drain channel two connected to the oil drain channel one. The upper support oil sump and the outer circumference of the eccentric mass block form an oil drain channel three connected to the oil drain channel two. An upper support oil return hole is provided through the inner and outer circumferences of the upper support to form an oil drain channel four. Thus, oil drain channels one, two, three and four are connected in sequence to drain the oil in the shoulder oil sump to the oil sump of the compressor housing, so as to export excess oil to the compressor housing.

[0083] In some implementations...

[0084] In the projection plane of the axial end face, the first oil drain channel is an annular channel, the second oil drain channel is a channel extending from the radial inner circumference of the eccentric mass block 15 to the radial outer circumference for a predetermined length of one, and the lower end height of the second oil drain channel is higher than the upper end height of the shoulder oil sump 200. The fourth oil drain channel is a channel extending from the radial inner circumference of the upper bracket 3 to the radial outer circumference for a predetermined length of two. The second oil drain channel and the fourth oil drain channel do not coincide in the axial projection plane.

[0085] The present invention preferably uses an annular oil drain channel one to increase the oil drain area. Preferably, the lower end of the oil drain channel two is higher than the upper end of the shoulder oil sump to ensure that the shoulder oil sump can store a sufficient amount of lubricating oil to ensure the oil supply performance of the pump body when the compressor starts. Preferably, the positions of the oil drain channel two and the oil drain channel four do not coincide in the axial projection plane, which can increase the movement path and movement distance of the oil drain, thereby effectively ensuring the amount of oil stored in the shoulder oil sump, reducing the oil drain speed, and also effectively lubricating and cooling the eccentric mass block, the moving plate, the upper support, and the eccentric mass block.

[0086] During operation, the compressor of this invention delivers lubricating oil from the central oil hole 163 of the crankshaft through the gap between the bearing 18 of the moving disc and the crank 162, entering the bottom of the eccentric hole 152 of the eccentric mass block 15. This ensures a constant volume of lubricating oil at the bottom. Upon startup, the lubricating oil stored at the bottom is sprayed onto the sealing ring 17 under centrifugal force through the moving disc bearing seat 201's moving disc oil holes 1-202 and 2-203, and then enters the back pressure chamber 302 to lubricate the pump body. This reduces the risk of delayed lubrication during startup and ensures the reliability of the compressor's operation. Simultaneously, the eccentric mass block 15 has a return oil hole 153, which is higher than the oil sump at the bottom of the eccentric hole 152 of the eccentric mass block 15. This return oil hole 153 is mainly used for oil return during normal compressor operation. The oil flows through the return oil hole 153 to the upper support oil sump 300, and then back to the bottom oil sump of the compressor's lower cover through the upper support return oil hole 301, thus forming a complete lubricating oil circulation system.

[0087] In some implementations...

[0088] The center line of the outer periphery of the eccentric mass block 15 is concentric with the center line 160 of the main shaft of the crankshaft 16. The inner periphery of the eccentric mass block 15 is an eccentric hole 152. The center line of the eccentric hole 152 is concentric with the center line 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.

[0089] The present invention also sets the outer circle of the eccentric mass block to be concentric with the crankshaft main shaft, which theoretically enables the eccentric mass block to have no oil churning power consumption inside the upper support oil sump, reducing the oil churning loss of the crank and the oil disturbance loss of the moving disc bearing seat, and effectively improving the energy efficiency of the compressor; the present invention further optimizes the center of the eccentric hole of the eccentric mass block to be concentric with the center line of the crank, which enables the moving disc bearing seat and the eccentric hole of the eccentric mass block to move relative to each other.

[0090] like Figure 2 This is a partial structural diagram of Embodiment 1 of the present invention. The lower second step surface 151 of the eccentric mass block 15 is fixed on the shoulder 161 of the crankshaft 16 and then fixed with screws. The outer circle of the eccentric mass block 15 is concentric with the center line 160 (i.e., the rotation center) of the crankshaft 16. An eccentric hole 152 is provided inside the eccentric mass block 15, and the center of the eccentric hole 152 is concentric with the center line of the crank 162. The moving disc 2 has a cold-pressed sliding bearing (bearing 18) inside the moving disc bearing seat 201, which is installed on the crank 162. The moving disc bearing seat 201 is built into the eccentric hole 152 of the eccentric mass block 15 and has a gap with the eccentric hole 152 (there is no frictional movement between them). The moving disc bearing seat 201 is provided with oil holes (moving disc oil hole one 202 and moving disc oil hole two 203), such as Figure 4-7As shown. The center of the eccentric hole 152 is concentric with the center line of the crank 162, so that the moving disc bearing seat 201 and the eccentric hole of the eccentric mass block 15 can move relative to each other. Since the outer circle of the eccentric mass block 15 is concentric with the crankshaft 16, the crank oil stirring loss is theoretically zero, thus reducing the oil stirring loss.

[0091] This invention utilizes a circular eccentric mass block fixed to the crankshaft shoulder. The bottom of the eccentric hole in this mass block stores a certain amount of lubricating oil. This bottom lubricating oil is rapidly supplied to the pump body's back pressure chamber through either the oil passage in the moving disc bearing housing or the oil passage in the eccentric mass block, reducing the risk of oil shortage and wear during pump start-up. Simultaneously, since the outer circumference of the eccentric mass block is concentric with the crankshaft main shaft, theoretically, the eccentric mass block consumes no oil churning power within the upper support oil sump, thus reducing oil turbulence losses in the moving disc bearing housing and improving the compressor's energy efficiency.

[0092] It can achieve the following technical effects:

[0093] 1. A certain amount of lubricating oil is stored at the bottom of the eccentric mass block, which can quickly supply oil to the pump body when the machine is turned on, solving the problem of insufficient oil during startup.

[0094] 2. The outer circle of the eccentric mass block is concentric with the center of the main shaft, theoretically eliminating oil disturbance and power consumption, thus solving the problem of oil churning loss.

[0095] The present invention also provides a scroll compressor, which includes the aforementioned pump body assembly.

[0096] 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.

[0097] like Figure 1 As shown, the scroll compressor of the present invention mainly consists of a motor 4, an upper bracket 3, a lower bracket 8, a stationary disc 1, a moving disc 2, 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 disc 2 and the stationary disc 1 are mounted opposite each other on the upper bracket 3 with a phase angle difference of 180 degrees. The moving disc 2 moves under the drive of the crankshaft 16, meshing with the stationary disc 1 to form a series of mutually isolated crescent-shaped sealed cavities with continuously changing volumes. The stationary disc 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.

[0098] 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. 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 compression, 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.

[0099] The present invention also provides an air conditioner comprising the aforementioned scroll compressor.

[0100] 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.

[0101] 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: A crankshaft (16) and an eccentric mass block (15), the crankshaft (16) comprising a crankshaft body and a crank (162), the crank (162) being located at the axial end of the crankshaft body, and a shoulder (161) forming at the junction of the crank (162) and the crankshaft body, wherein in a 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 that at the junction of the shoulder (161) and the crank (162)... The joint forms a first stepped surface (100), and the eccentric mass block (15) includes a mating part (158) that mates with the first stepped surface (100), such that the mating part (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 a shoulder oil sump (200), the shoulder oil sump (200) being able to store lubricating oil, such 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; It also includes a moving disk (2), which includes a moving disk base plate (21). The eccentric mass block (15) has an oil delivery channel one (157), an oil delivery channel two (155), and an oil delivery channel three (154). One end of the oil delivery channel one (157) is located on the radial inner circumference of the eccentric mass block (15) and communicates with the shoulder oil sump (200), while the other end extends toward the interior of the eccentric mass block (15). The oil delivery channel two (155)... The lower end is connected to the first oil channel (157), the upper end of the second oil channel (155) is connected to the third oil channel (154), the upper end of the eccentric mass block (15) and the moving disk base plate (21) form the fourth oil channel, and the oil in the shoulder oil pool (200) can sequentially supply oil to the pump body through the first oil channel (157), the second oil channel (155), the third oil channel (154) and the fourth oil channel; 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 (400); 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: 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) is driven by the crank (162) to drive the moving disk bearing seat (201) to move. The shaft end of the moving disk bearing seat (201) is spaced apart from the first step 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 disk bearing seat (201) and the first step surface (100).

3. The pump body assembly according to claim 2, characterized in that: It also includes a bearing (18), 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 (18) is also spaced a second preset distance from the first step surface (100). At least part 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 step surface (100).

4. The pump body assembly according to claim 3, characterized in that: The moving disk bearing housing (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). The 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 (500). There is an oil supply channel two (600) between the outer periphery of the crank (162) and the inner periphery of the bearing (18). The crankshaft (16) has a central oil hole (163) inside. The central oil hole (163) is connected to the shoulder oil pool (200) in sequence through the oil supply channel one (500) and the oil supply channel two (600) to provide lubricating oil to the shoulder oil pool (200).

5. The pump body assembly according to claim 2, characterized in that: The interior of the moving disc bearing seat (201) is also provided with a moving disc oil hole. The moving disc bearing seat (201) is connected to one axial end of the moving disc base plate (21) and extends axially away from the moving disc bearing seat (201). There is a gap between the axial end of the eccentric mass block (15) facing the moving disc base plate (21) and the moving disc base plate (21). One end of the moving disc oil hole is connected to the shoulder oil sump (200), and the other end is connected to the gap between the eccentric mass block (15) and the moving disc base plate (21), thereby supplying oil to the pump body.

6. The pump body assembly according to claim 5, characterized in that: The moving plate oil hole includes a moving plate oil hole one (202) and a moving plate oil hole two (203). The lower end of the moving plate oil hole one (202) is located at the bottom end of the moving plate bearing seat (201) and communicates with the shoulder oil sump (200). The upper end of the moving plate oil hole one (202) extends to communicate with the moving plate oil hole two (203). The moving plate oil hole two (203) extends to the outer periphery of the moving plate bearing seat (201) and communicates with the gap.

7. The pump body assembly according to claim 1, characterized in that: The first oil channel (157) is opposite to the shoulder oil sump (200) in the height direction. The second oil channel (155) is located inside the eccentric mass block (15) and extends along the axial direction of the crankshaft (16). The third oil channel (154) is located at the upper end of the eccentric mass block (15) and extends into an arc-shaped groove structure on the upper end face.

8. The pump body assembly according to claim 2, characterized in that: It also includes an upper bracket (3), an eccentric hole (152) is formed on the inner circumference of the eccentric mass block (15), an oil drain channel one is formed between the eccentric hole (152) and the outer circumference of the moving disc bearing seat (201), an oil return hole (153) is provided through the inner and outer circumferences of the eccentric mass block (15) to form an oil drain channel two, an upper bracket oil sump (300) is provided on the inner circumference of the upper bracket (3), an oil drain channel three is formed between the upper bracket oil sump (300) and the outer circumference of the eccentric mass block (15), an upper bracket oil return hole (301) is provided through the inner and outer circumferences of the upper bracket (3) to form an oil drain channel four, and the shoulder oil sump (200) discharges oil to the outside of the upper bracket (3) in sequence through the oil drain channel one, the oil drain channel two, the oil drain channel three and the oil drain channel four.

9. The pump body assembly according to claim 8, characterized in that: In the projection plane of the axial end face, the first oil drain channel is an annular channel, the second oil drain channel is a channel extending from the radial inner circumference of the eccentric mass block (15) to the radial outer circumference for a predetermined length of one, and the lower end height of the second oil drain channel is higher than the upper end height of the shoulder oil sump (200), the fourth oil drain channel is a channel extending from the radial inner circumference of the upper bracket (3) to the radial outer circumference for a predetermined length of two, and the second oil drain channel and the fourth oil drain channel do not coincide in the axial projection plane.

10. The pump body assembly according to claim 2, characterized in that: The outer periphery of the eccentric mass block (15) is concentric with the main shaft centerline (160) of the crankshaft (16). The inner periphery of the eccentric mass block (15) is an eccentric hole (152). The centerline of the eccentric hole (152) is concentric with the centerline 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.

11. A scroll compressor, characterized in that: Includes the pump body assembly according to any one of claims 1-10.

12. An air conditioner, characterized in that: Including the scroll compressor as described in claim 11.

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