Crankshaft assembly and pump body assembly having therein, compressor and refrigeration equipment

Abstract

This invention relates to a crankshaft assembly and a pump body assembly having the same, a compressor, and a refrigeration device. The crankshaft assembly includes: a crankshaft and an oil pumping channel disposed at the center of the crankshaft shaft, the bottom and top ends of the oil pumping channel communicating with a refrigerant oil storage tank and a housing cavity, respectively; an oil outlet hole is provided on the side wall of the oil pumping channel; and a lightweight sphere disposed within the oil pumping channel, located between the oil outlet hole and the top end of the oil pumping channel. The solution provided in this application can meet the required oil pumping volume for compressor operation even at low-frequency operation, and can increase the oil pumping volume within the pump body assembly at high-frequency operation, while avoiding or significantly reducing the amount of refrigerant oil discharged into the housing cavity, effectively reducing the total oil pumping volume of the compressor, thereby reducing the amount of refrigerant oil filled, improving compressor performance, reducing compressor costs, and benefiting manufacturing enterprises in cost reduction and efficiency improvement.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more particularly to a crankshaft assembly and a pump body assembly having the same, a compressor and a refrigeration device. Background Technology

[0002] Roller compressors, also known as piston compressors, are widely used in household appliances such as refrigerators and refrigeration equipment due to their small size, simple and reliable structure, and high gas delivery coefficient.

[0003] Currently, compressors include a housing and a pump assembly. The pump assembly includes a crankshaft assembly that supplies refrigerant oil. The crankshaft assembly is a key component of the compressor. During compressor operation, to achieve lubrication and cooling, and to ensure long-term reliable operation, the refrigerant oil inside the compressor is generally transferred to the compressor's pump assembly via the crankshaft assembly. Therefore, existing crankshaft assemblies are designed with oil outlets and oil passages. Specifically, the crankshaft assembly includes a crankshaft, an oil pump pipe located at the center of the crankshaft, an oil pump hole located at the end of the crankshaft, and an oil outlet located on the side of the crankshaft. The oil pump hole is completely immersed in refrigerant oil and is connected to the oil pump pipe. The top end of the oil pump pipe (i.e., the end furthest from the refrigerant oil) is connected to the inner cavity of the housing through a balance through-hole. When the crankshaft rotates, it drives the oil pump hole to draw in the refrigerant oil, and the refrigerant oil is pumped into the compressor's pump assembly through the oil outlet via centrifugal force, ensuring compressor lubrication and thus playing an important role in cooling, reducing component wear, reducing noise, and reducing friction loss.

[0004] During compressor operation, especially at high frequencies, the balance through-hole at the top of the oil pump pipe is located above the compressor pump body assembly's exhaust port. When the crankshaft assembly pumps oil, a significant amount of refrigerant oil is discharged from this through-hole. The upward thrust of the exhaust refrigerant slows the return flow of the refrigerant oil to the refrigerant oil storage tank, and may even cause the refrigerant oil to be discharged along with the exhaust refrigerant, resulting in severe waste. This necessitates injecting more refrigerant oil into the compressor, affecting its performance and increasing material costs, hindering cost reduction and efficiency improvement for manufacturing companies. However, directly reducing the compressor's operating frequency to a low frequency might result in insufficient oil pumping, failing to meet the compressor's operational requirements.

[0005] Therefore, there is an urgent need to design a crankshaft assembly and a pump body assembly, compressor, and refrigeration equipment that can meet the required oil pumping volume during low-frequency compressor operation and increase the oil pumping volume within the pump body assembly during high-frequency compressor operation. At the same time, it can avoid or significantly reduce the amount of refrigerant oil discharged into the housing cavity, effectively reducing the total oil pumping volume, thereby reducing the amount of refrigerant oil filled into the compressor, improving compressor performance, reducing compressor costs, and benefiting manufacturing enterprises in reducing costs and increasing efficiency. Summary of the Invention

[0006] To overcome the problems existing in related technologies, this application provides a crankshaft assembly and a pump body assembly having the same, a compressor, and a refrigeration device. The crankshaft assembly and the pump body assembly having the same, the compressor, and the refrigeration device can meet the required oil pumping volume during compressor operation even at low frequency operation, and can increase the oil pumping volume in the pump body assembly at high frequency operation. At the same time, it avoids or significantly reduces the amount of refrigerant oil discharged into the housing cavity, effectively reducing the amount of refrigerant oil filled into the compressor, improving compressor performance, reducing compressor costs, and helping manufacturing enterprises reduce costs and increase efficiency.

[0007] The first aspect of this application provides a crankshaft assembly, including a crankshaft and an oil pumping channel disposed at the center of the crankshaft shaft, wherein the bottom end and the top end of the oil pumping channel are respectively connected to a refrigeration oil storage tank and an inner cavity of a housing; it also includes a lightweight sphere; an oil outlet hole is provided on the side wall of the oil pumping channel; the lightweight sphere is disposed in the oil pumping channel and is located between the oil outlet hole and the top end of the oil pumping channel.

[0008] In one embodiment, the oil pumping channel includes a first oil pump pipe and a second oil pump pipe arranged along the length of the crankshaft; the axes of the first oil pump pipe and the second oil pump pipe overlap with the axis of the crankshaft; the diameter of the lightweight sphere is larger than the diameter of the second oil pump pipe and smaller than the diameter of the first oil pump pipe.

[0009] In one embodiment, the bottom end of the first pump pipe is provided with a pumping hole, which is completely immersed in the refrigeration oil in the refrigeration oil storage tank; the top end of the second pump pipe is provided with a balance through hole; the balance through hole is connected to the inner cavity of the housing.

[0010] In one embodiment, the bottom end of the second pump pipe is provided with a frustum; the diameter of the lower surface of the frustum is equal to the pipe diameter of the first pump pipe.

[0011] In one embodiment, an oil guide pipe is provided inside the first pump oil pipe; the gap distance between the top end of the oil guide pipe and the bottom end of the second pump oil pipe is greater than the diameter of the lightweight sphere, and the diameter of the oil guide pipe is smaller than the diameter of the lightweight sphere.

[0012] In one embodiment, the top end of the oil guide tube has a notch, and the shape of the notch does not match the shape of the lightweight sphere.

[0013] In one embodiment, the sidewall of the oil guide pipe is provided with a clearance hole, which is disposed opposite to the oil outlet hole; and the outer sidewall of the oil guide pipe is in contact with the inner sidewall of the first pump oil pipe.

[0014] A second aspect of this application provides a pump body assembly, including an upper flange assembly and the aforementioned crankshaft assembly; the side wall of the oil pump passage in the crankshaft assembly is provided with an oil return hole; the upper flange assembly is provided with an oil return channel; one end of the oil return channel is connected to the oil return hole, and the other end is connected to the refrigeration oil storage tank.

[0015] A third aspect of this application provides a compressor including the pump body assembly described above.

[0016] The fourth aspect of this application provides a refrigeration device, including the compressor described above.

[0017] The technical solution provided in this application may include the following beneficial effects: When the compressor is not pumping oil or the compressor is operating at low frequency (i.e., the oil pumping volume is small, resulting in the liquid level of the refrigeration oil not rising high enough to block the bottom opening of the second oil pumping pipe with the light sphere), the pressure in the oil pumping channel is balanced with that in the inner cavity of the housing. The light sphere is in a free-moving state or rises with the liquid level of the refrigeration oil. Due to the small oil pumping volume and the obstruction of the light sphere to the pumping of the refrigeration oil into the D oil circuit, very little refrigeration oil can be pumped into the D oil circuit. The refrigeration oil pumped into the first oil pumping pipe preferentially satisfies the pump body assembly. The oil pumping requirements are met, ensuring that the compressor can meet its oil pumping needs even under low-frequency operation. When the compressor operates at high frequency, as the refrigerant oil level rises, the lightweight ball blocks the bottom opening of the second oil pumping pipe, causing the pressure in the first oil pumping pipe to increase. This significantly reduces or eliminates the amount of oil pumped into the D oil circuit, increasing the amount of oil pumped into the pump body assembly. This effectively improves the lubrication of the compressor pump body assembly and reduces the total amount of oil pumped, thereby reducing the amount of refrigerant oil needed to fill the refrigerant oil storage tank and lowering costs. This is of great significance for enterprises to achieve cost reduction and efficiency improvement.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0020] Figure 1 This is a schematic diagram of the crankshaft assembly shown in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the oil guide pipe shown in the embodiment of this application;

[0022] Figure 3 This is a schematic diagram showing the relationship between compressor frequency, pump oil volume, and oil pressure before and after the improvement of the crankshaft assembly structure, as illustrated in the embodiments of this application.

[0023] Figure 4 This is a schematic diagram of the pump body assembly shown in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the compressor structure shown in an embodiment of this application.

[0025] Figure label:

[0026] 1. Crankshaft; 2. Lightweight sphere; 31. First pump oil pipe; 311. Pump oil hole; 312. Oil outlet A; 313. Oil outlet B; 314. Oil outlet C; 32. Second pump oil pipe; 321. Frustum; 322. Balance through hole; 4. Guide pipe; 41. Notch; 42. Displacement hole; 5. Pump body assembly; 51. Upper flange assembly; 511. Oil return channel; 52. Roller; 53. Lower flange assembly; 6. Housing; 61. Housing cavity; 62. Refrigeration oil storage tank. Detailed Implementation

[0027] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0028] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0029] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Currently, during the operation of a compressor, when the compressor is running at high frequency, because the balance through hole at the top of the oil pump pipe is located above the exhaust port of the compressor pump body assembly, the refrigerant oil will be discharged from the balance through hole when the crankshaft assembly pumps oil. Under the thrust of the upward flow of the exhaust refrigerant, the speed at which the refrigerant oil flows back to the oil sump will slow down, and the refrigerant oil may even be discharged along with the refrigerant, resulting in waste of refrigerant oil. This causes the compressor to need to be injected with more refrigerant oil, which not only affects the performance of the compressor, but also increases the material cost of the compressor, which is not conducive to cost reduction and efficiency improvement for manufacturing enterprises.

[0031] To address the aforementioned issues, this application provides a crankshaft assembly that can meet the required oil pumping volume during compressor operation even at low-frequency operation and increase the oil pumping volume within the pump body assembly at high-frequency operation. Simultaneously, it avoids or significantly reduces the amount of refrigerant oil discharged into the housing cavity, effectively reducing the amount of refrigerant oil injected into the compressor, improving compressor performance, and lowering compressor costs. This benefits manufacturing enterprises by reducing costs and increasing efficiency.

[0032] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] Please see Figures 1-5 , Figure 1 This is a schematic diagram of the crankshaft assembly shown in an embodiment of this application.

[0035] This application discloses a crankshaft assembly, including a crankshaft 1 and an oil pumping channel disposed at the center of the crankshaft shaft. The bottom and top ends of the oil pumping channel are respectively connected to a refrigeration oil storage tank 62 and a housing cavity 61. Specifically, the lower end of the oil pumping channel is provided with an oil pumping hole 311, which is completely immersed in the refrigeration oil in the refrigeration oil storage tank 62, for pumping the refrigeration oil into the oil pumping channel. An oil outlet is provided on the side wall of the oil pumping channel. There can be three oil outlets: an A oil outlet 312, a B oil outlet 313, and a C oil outlet 314. The A oil outlet 312 forms an A oil passage with the oil pumping channel, for supplying refrigeration oil to the upper flange assembly 51. The B oil outlet 313 is connected to the upper flange assembly 51... The oil pump channel forms oil passage B, which supplies refrigerant oil to roller 52. Oil outlet C 314 forms oil passage C with the oil pump channel, which supplies refrigerant oil to lower flange assembly 53. This reduces the friction between upper flange assembly 51, lower flange assembly 53, and roller 52 during compressor operation. An oil guide plate is also provided within the oil pump channel to guide the refrigerant oil pumped into the oil pump hole 311 to the oil outlet. A balance through hole 322 is provided at the upper end of the oil pump channel, connecting the oil pump channel to the inner cavity 61 of the housing. When the compressor is running, the oil pump hole 311 pumps refrigerant oil into the oil pump channel. At this time, the oil pressure F of the oil pump hole 311... 油压力 Pressure P in the inner cavity 61 of the housing 壳内腔 The balance allows the crankshaft assembly to pump oil normally.

[0036] like Figure 1 and Figure 5 As shown, oil passages A, B, and C supply refrigerant oil to the upper flange assembly 51, roller 52, and lower flange assembly 53 of the pump body assembly 5, respectively. Due to the small gap between the pump body assemblies 5, after the oil pumping port 311 pumps the refrigerant oil into the oil pumping channel, only a small portion of the refrigerant oil will flow out through oil outlet ports A 312, B 313, and C 314, respectively. The majority of the remaining refrigerant oil will continue to rise and be pumped to the balance through-hole 322 through oil passage D formed by the balance through-hole 322 and the oil pumping channel. Located above the exhaust port of the pump body assembly 5, the resistance of the exhaust refrigerant not only slows down the return flow of the refrigerant oil in the D oil circuit to the refrigerant oil storage tank 62, but also causes some refrigerant oil to be carried away by the exhaust refrigerant, resulting in a decrease in the utilization rate of the refrigerant oil. At the same time, in order to ensure the pump oil demand during normal operation of the compressor, the amount of refrigerant oil filled into the refrigerant oil storage tank 62 must be increased, resulting in waste of refrigerant oil and affecting the performance of the compressor. It should be noted that this situation will become more serious as the operating frequency of the compressor increases.

[0037] Therefore, in order to improve the utilization rate of the refrigeration oil and prevent the refrigeration oil from being discharged from the D oil passage, the crankshaft assembly also includes a lightweight ball 2. The lightweight ball 2 is disposed in the oil pumping channel and located between the oil outlet and the top of the oil pumping channel, for preventing the refrigeration oil from being discharged into the inner cavity 61 of the housing. Specifically, the oil pumping channel includes a first oil pumping pipe 31 and a second oil pumping pipe 32 arranged along the length direction of the crankshaft 1. The axes of the first oil pumping pipe 31 and the second oil pumping pipe 32 overlap with the axis of the crankshaft 1, that is, The first oil pump pipe 31 is located directly below the second oil pump pipe 32, and the first oil pump pipe 31 is connected to the second oil pump pipe 32. The bottom end of the first oil pump pipe 31 is provided with an oil pumping hole 311, which is completely immersed in the refrigeration oil in the refrigeration oil storage tank 62, so that when the compressor is running, the refrigeration oil is pumped into the first oil pump pipe 31 and the second oil pump pipe 32 through the oil pumping hole 311. The top end of the second oil pump pipe 32 is provided with a balance through hole 322, which is connected to the inner cavity 61 of the housing.

[0038] In order to ensure that the lightweight sphere 2 can block the refrigerant oil pump from reaching the balance through-hole 322 while the crankshaft assembly supplies refrigerant oil to the pump body assembly 5, an oil outlet hole A 312, an oil outlet hole B 313, and an oil outlet hole C 314 are sequentially provided on the side wall of the first pump oil pipe 31 from top to bottom. The diameter of the first pump oil pipe 31 is larger than the diameter of the second pump oil pipe 32, and the diameter d of the lightweight sphere 2 is... 球 The diameter d2 of the second oil pump pipe 32 is larger than that of the first oil pump pipe 31, while the diameter d1 of the first oil pump pipe 31 is smaller. This allows the lightweight sphere 2 to move freely within the first oil pump pipe 31 while effectively blocking the bottom opening of the second oil pump pipe 32, preventing or limiting the entry of the refrigerant oil into the second oil pump pipe 32. To better fit the shape of the bottom opening of the second oil pump pipe 32 to the lightweight sphere 2, a frustum 321 is provided at the bottom of the second oil pump pipe 32. The diameter of the upper surface of the frustum 321 is equal to the diameter of the second oil pump pipe 32, and the diameter of the lower surface is equal to the diameter of the first oil pump pipe 31. This allows the lightweight sphere 2 to be positioned at the frustum 321 as the refrigerant oil level rises during oil pumping, thereby blocking the second oil pump pipe 32.

[0039] In order for the lightweight sphere 2 to rise with the rise of the refrigeration oil and to block the bottom opening of the second pump oil pipe 32, the lightweight sphere 2 is preferably a hollow sphere with a large volume and light weight. Specifically, the material of the lightweight sphere 2 includes aluminum or high-temperature resistant plastic.

[0040] To confine the lightweight sphere 2 above the oil outlet, an oil guide pipe 4 is provided inside the first oil pump pipe 31, and the outer side wall of the oil guide pipe 4 is in contact with the inner side wall of the first oil pump pipe 31; the bottom end of the oil guide pipe 4 has a bottom opening, which is completely immersed in the refrigeration oil; the gap between the top end of the oil guide pipe 4 and the bottom end of the second oil pump pipe 32 is greater than the diameter of the lightweight sphere 2, and the pipe diameter d of the oil guide pipe 4 is smaller than the diameter d of the lightweight sphere 2; this allows the lightweight sphere 2 to be confined between the oil guide pipe 4 and the second oil pump pipe 32, further preventing the lightweight sphere 2 from blocking the oil outlet when it descends, thus hindering the smooth flow of oil circuits A, B, and C.

[0041] like Figures 1-2 As shown, after the oil guide pipe 4 is set, the oil pumping hole 311 is located inside the oil guide pipe 4. In order to further improve the pumping efficiency of the A oil circuit, B oil circuit and C oil circuit, a clearance hole 42 is also provided on the side wall of the oil guide pipe 4. Preferably, the clearance hole 42 is arranged opposite to the oil outlet hole, so that when the refrigeration oil flows out from the clearance hole 42, it can be pumped to the oil outlet hole arranged opposite.

[0042] When the compressor has just started, is operating at low frequency, or when there is gas in the oil pumping port 311, the lightweight ball 2 may not come into contact with the refrigerant oil. That is, the lightweight ball 2 will not be pushed up by the refrigerant oil at this time. Under the influence of gravity, the lightweight ball 2 may block the top opening of the oil guide pipe 4, sealing the gas inside the oil guide pipe 4 and affecting the normal oil pumping of the crankshaft assembly. To avoid this situation, the top of the oil guide pipe 4 is provided with a notch 41. The shape of the notch 41 does not match the shape of the lightweight ball 2, preventing the lightweight ball 2 from pressing against the notch 41. Even if the lightweight ball 2 blocks the top opening of the oil guide pipe 4, the gas can still be discharged through the notch 41. The specific principle is: air is expelled through the notch 41, creating a low pressure that allows the refrigerant oil to rise rapidly, thus enabling the crankshaft assembly to pump oil normally.

[0043] When the crankshaft assembly is configured as described above, the state of the crankshaft assembly pumping oil changes as follows: First step: When the crankshaft assembly is not pumping oil or the refrigeration oil has not risen to the light sphere 2, the light sphere 2 is in a free motion state, or is pressed on the top of the oil guide pipe 4 under the action of gravity. The first oil pumping pipe 31, the second oil pumping pipe 32 and the oil guide pipe 4 are connected to the balance through hole 322 and the oil pumping hole 311, so that the oil pressure F of the oil pumping hole 311 is balanced with the pressure P of the inner cavity 61 of the housing, and the crankshaft assembly pumps oil normally. As the level of the refrigerant oil in the first pump pipe 31 rises, the lightweight sphere 2, under the influence of the oil pressure F, overcomes gravity G and continuously floats upwards until it blocks the bottom opening of the second pump pipe 32. This prevents or reduces the amount of refrigerant oil pumped into the second pump pipe 32. At this point, because the bottom opening of the second pump pipe 32 is blocked, the pumping port 311 remains in a pumping state, with only outlets A 312, B 313, and C 314 remaining. Since the pumping volume changes significantly per unit, while the output volume changes only slightly, this effectively pushes oil continuously into the pumping port 311, increasing the pressure in the sealed port 311. When the pumping volume increases, the oil pressure F in the first pump pipe 31 rises. 油压力 This increases the amount of refrigerant oil pumped into the pump body assembly from the oil outlet. Therefore, when the amount of refrigerant oil pumped into the pump body assembly is the same, the compressor using the crankshaft assembly of this solution can operate at a lower frequency. That is, the compressor can meet the oil pumping requirements of the compressor even when operating at a low frequency.

[0044] Step 2: When the refrigeration oil in the first pump oil pipe 31 flows to the pump body assembly 5 through the oil outlet A 312, oil outlet B 313 and oil outlet C 314, the liquid level of the refrigeration oil in the first pump oil pipe 31 drops, and the lightweight ball 2 drops with the refrigeration oil. At this time, the lightweight ball 2 cannot block the bottom opening of the second pump oil pipe 32, so that the pump oil hole 311 is connected to the inner cavity 61 of the housing, and the oil pressure F is balanced with the pressure inside the housing.

[0045] It should be noted that, as the oil pumping hole 311 in the first step continuously pumps oil, the level of the refrigeration oil will continue to rise, causing the lightweight ball 2 to block the bottom opening of the second oil pumping pipe 32, resulting in a further increase in oil pressure. At the same time, the refrigeration oil in the first oil pumping pipe 31 in the second step is pumped into the pump body assembly 5 through the oil outlet, causing the refrigeration oil in the first oil pumping pipe 31 to be pumped in and out simultaneously. This process can be regarded as a static process. During this process, the level of the refrigeration oil will not drop, and all the oil pumped in the crankshaft assembly is pumped into the pump body assembly 5, resulting in a smaller total oil pumping volume.

[0046] Due to oil pressure F油压力 It has a positive growth relationship with the compressor operating frequency. When the compressor operates at a high frequency, it has a large oil pressure F 油压力 and has a small oil pressure F when operating at a low frequency 油压力 Let the minimum compressor operating frequency that can push the lightweight sphere 2 upward and block the bottom opening of the second pump oil pipe 32 be xmin. When the compressor operating frequency x < xmin, although the first pump oil pipe 31 is connected to the inner cavity 61 of the housing at this time, due to the small amount of pumped oil and the obstruction of the lightweight sphere 2 to the refrigerating oil pumped into the D oil circuit, the amount of refrigerating oil that can be pumped into the D oil circuit is very small. The refrigerating oil pumped into the first pump oil pipe 31 preferentially meets the pumped oil volume requirement of the pump body assembly 5, so that the compressor can also meet the pump oil requirement of the compressor when operating at a low frequency; when the compressor operating frequency x > xmin, the lightweight sphere 2 will block the bottom opening of the second pump oil pipe 32, and the first pump oil pipe 31 is a closed space. At this time, the oil pressure increases with the increase of the compressor operating frequency. At the same time, due to the increase of the oil pressure, the proportion of the pumped oil volume of the A + B + C oil circuit increases, while the pumped oil volume in the D oil circuit decreases significantly or even disappears, resulting in a decrease in the total pumped oil volume A + B + C + D, but the pumped oil volume pumped into the pump body assembly 5 increases, effectively improving the lubrication of the compressor pump body assembly 5. It should be noted that when the crankshaft assembly pumps oil, the refrigerating oil rises with the oil guiding piece under the action of inertia. The refrigerating oil guided by the oil guiding piece is equal to the rotational speed × the pumped oil volume per revolution. The pumped oil volume per revolution is also related to the oil guiding piece and the pump oil hole 311 in the first pump oil pipe 31, and the oil guiding piece is arranged in the oil guiding pipe 4, so the final amount of pumped oil depends on the diameter of the pump oil hole 311. The larger the pipe diameter of the first pump oil pipe 31, that is, the larger the diameter of the pump oil hole 311, the larger the pumped oil volume and the smaller xmin

[0047] The specific results are as Figure 3 shown Figure 3 is a schematic diagram of the relationship between the compressor frequency, the pumped oil volume and the oil pressure before and after the improvement of the crankshaft assembly structure; the total pumped oil volume of the A'+B'+C'+D' oil circuit in the improved crankshaft 1 structure is much lower than that of the A + B + C + D oil circuit before the improvement, and the pumped oil volume of the A'+B'+C' oil circuit is much higher than that of the A + B + C oil circuit before the improvement, indicating that the refrigerating oil in the D oil circuit is greatly reduced, and the refrigerating oil in the A oil circuit, B oil circuit and C oil circuit increases, further improving the performance of the compressor

[0048] It should be noted that the low frequency in this application refers to that compared with the existing compressor, the frequency required to meet the pumped oil volume for normal operation is lower than the frequency required by the existing compressor to meet the pumped oil volume for normal operation

[0049] In this first embodiment, when the compressor is not pumping oil or is operating at low frequency (i.e., the oil pumping volume is so small that the liquid level of the refrigerant oil does not rise high enough to block the bottom opening of the second oil pumping pipe), the pressure in the oil pumping channel is balanced with the pressure in the inner cavity of the housing. The light ball is in a free-moving state or rises with the liquid level of the refrigerant oil. Because the oil pumping volume is small and the light ball obstructs the pumping of the refrigerant oil into oil circuit D, very little refrigerant oil can be pumped into oil circuit D. The refrigerant oil pumped into the first oil pumping pipe primarily meets the pumping volume requirements of the pump body assembly. This allows the compressor to meet its oil pumping needs even at low frequencies. When the compressor operates at high frequencies, as the refrigerant oil level rises, the lightweight ball blocks the bottom opening of the second oil pump pipe, causing the pressure in the first oil pump pipe to increase. This significantly reduces or eliminates the amount of oil pumped into the D oil circuit, increasing the amount of oil pumped into the pump body assembly. This effectively improves the lubrication of the compressor pump body assembly and reduces the total amount of oil pumped, thereby reducing the amount of refrigerant oil needed to fill the refrigerant oil storage tank and lowering costs. This is of great significance for enterprises to achieve cost reduction and efficiency improvement.

[0050] Example 2

[0051] Currently, due to the slow return flow rate of the refrigerant oil in the pump body assembly, the refrigerant oil temperature easily rises, resulting in poor cooling performance of the pump body assembly. To address this problem, this application proposes a corresponding solution. Please refer to [link / reference]. Figure 4 Specifically:

[0052] Based on the structure of the above embodiment 1, this application also provides a pump body assembly 5, including an upper flange assembly 51, a lower flange assembly 53, a roller 52, and the aforementioned crankshaft assembly; the side wall of the pump oil passage in the crankshaft assembly is provided with an oil return hole, and the upper flange assembly 51 is provided with an oil return channel 511, one end of the oil return channel 511 is connected to the oil return hole, and the other end is connected to the refrigeration oil storage tank 62; specifically, the oil return hole is located above the oil outlet of the first pump oil pipe 31 and directly opposite the upper flange assembly 51, and the extension direction of the oil return channel 511 is perpendicular to the length direction of the crankshaft 1, so that the refrigeration oil pumped to the top of the oil outlet can quickly fall back into the refrigeration oil storage tank 62 through the oil return hole and along the oil return channel 511, effectively accelerating the return speed of the refrigeration oil and avoiding the problem of temperature rise caused by slow return speed of the refrigeration oil.

[0053] The specific structure of the crankshaft assembly is detailed in the above embodiments and will not be repeated here.

[0054] In this embodiment, the pump body assembly of the crankshaft assembly provided in this application is used. During the operation of the compressor, it can not only increase the amount of pumped oil into the pump body assembly and improve the lubrication between the pump body assemblies, but also effectively accelerate the return speed of the refrigeration oil, thus avoiding the problem of poor cooling effect caused by the temperature rise of the refrigeration oil due to slow return speed.

[0055] Example 3

[0056] Currently, during compressor operation, especially when the compressor is running at high frequency, the thrust of the discharged refrigerant causes the refrigerant oil to flow back to the oil sump more slowly, and may even cause the refrigerant oil to be discharged along with the refrigerant, resulting in waste of refrigerant oil, increased refrigerant oil filling volume, and increased compressor cost.

[0057] To resolve the above issues, please refer to Figure 5 This application also proposes a compressor, specifically including a housing 6 and a pump assembly 5 as described above; specifically, the housing 6 forms a housing cavity 61, the pump assembly 5 is disposed in the housing cavity 61, and the bottom end of the housing cavity 61 is also provided with a refrigeration oil storage tank 62 for storing the refrigeration oil.

[0058] The specific structural features of the pump body assembly can be found in the above embodiments, and will not be repeated here.

[0059] In this embodiment of the application, a compressor using the oil pump assembly provided in this application is used. During operation, especially when the compressor is running at high frequency, the amount of refrigeration oil discharged with the refrigerant can be effectively reduced, and the amount of oil pumped into the pump body assembly can be increased. While improving the performance of the compressor, the amount of refrigeration oil stored in the refrigeration oil storage pool is greatly reduced, which effectively reduces the cost of the enterprise and helps the enterprise to achieve cost reduction and efficiency improvement.

[0060] Example 4

[0061] This application also provides a refrigeration device, including the compressor as described above; specifically, the refrigeration device includes air conditioners and refrigerators, etc.

[0062] The specific structural features of the compressor can be found in the above embodiments, and will not be repeated here.

[0063] The compressor in the refrigeration equipment has the same effect as the compressor described in Embodiment 3 above, and will not be repeated here.

[0064] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated further here.

[0065] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different emphases; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0066] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A crankshaft assembly comprising a crankshaft (1) and a pump oil passage provided at the center of the crankshaft, the bottom end and the top end of the pump oil passage being connected to a refrigerant oil storage pool (62) and a housing inner cavity (61) respectively; characterized in that: It also includes lightweight spheres (2); An oil outlet hole is provided on the side wall of the oil pump channel; The lightweight sphere (2) is disposed in the oil pump channel and is located between the oil outlet and the top of the oil pump channel; The oil pump passage includes a first oil pump pipe (31) and a second oil pump pipe (32) arranged along the length of the crankshaft (1); The axes of the first pump oil pipe (31) and the second pump oil pipe (32) overlap with the axis of the crankshaft (1); The diameter of the lightweight sphere (2) is larger than the diameter of the second pump pipe (32) and smaller than the diameter of the first pump pipe (31); The first oil pump pipe (31) is provided with an oil guide pipe (4); the gap between the top end of the oil guide pipe (4) and the bottom end of the second oil pump pipe (32) is greater than the diameter of the lightweight sphere (2), and the diameter of the oil guide pipe (4) is smaller than the diameter of the lightweight sphere (2); the top end of the oil guide pipe (4) is provided with a notch (41), and the shape of the notch (41) does not match the shape of the lightweight sphere (2); air is discharged through the notch (41), so that the refrigeration oil can rise rapidly.

2. The crankshaft assembly according to claim 1, characterized in that: The bottom end of the first oil pump pipe (31) is provided with an oil pump hole (311), which is completely immersed in the refrigeration oil in the refrigeration oil storage tank (62); The top end of the second pump oil pipe (32) is provided with a balance through hole (322); the balance through hole (322) is connected to the inner cavity of the housing.

3. The crankshaft assembly according to claim 1, characterized in that: The bottom end of the second pump oil pipe (32) is provided with a frustum (321); The diameter of the lower surface of the frustum (321) is equal to the diameter of the first pump oil pipe (31).

4. The crankshaft assembly according to claim 1, characterized in that: The oil guide pipe (4) has a clearance hole (42) on its side wall, which is opposite to the oil outlet hole; and the outer side wall of the oil guide pipe (4) is in contact with the inner side wall of the first pump oil pipe (31).

5. A pump body assembly characterized by: Includes the upper flange assembly (51) and the crankshaft assembly as claimed in any one of claims 1 to 4; The crankshaft assembly has an oil return hole on the side wall of the oil pump channel; The upper flange assembly (51) is provided with an oil return channel (511); One end of the oil return channel (511) is connected to the oil return hole, and the other end is connected to the refrigeration oil storage tank (62).

6. A compressor, characterized in that, Includes the pump body assembly (5) as described in claim 5.

7. A refrigeration device, characterized in that, Includes the compressor as described in claim 6.

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