Compressors and their crankshafts and household appliances

Abstract

The present invention discloses a compressor and its crankshaft and household appliances, wherein the crankshaft of the compressor includes a main shaft and a secondary shaft connected to each other, the main shaft has an oil guide channel, an oil pumping structure and an oil leakage structure, the oil pumping structure has an oil inlet hole opened on the outer wall of the main shaft and connected to the oil guide channel and a spiral oil groove located on the outer wall of the main shaft, the lower end of the spiral oil groove is connected to the oil inlet hole, and the upper end is connected to the secondary shaft; the oil leakage structure has a first oil leakage hole opened on the outer wall of the main shaft and connected to the oil guide channel, the position of the first oil leakage hole is higher than the position of the oil inlet hole and lower than the upper end position of the oil guide channel. The crankshaft of the above compressor has the characteristic of self-adaptation of pumping oil quantity.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor, a crankshaft thereof and a household appliance. Background Art

[0002] The variable frequency reciprocating compressor controls the refrigeration capacity by changing the operating speed of the compressor, which is not only conducive to obtaining a good refrigeration effect, but also conducive to energy conservation and emission reduction. The variable frequency reciprocating compressor generates centrifugal force through the rotation of the crankshaft to achieve oil pumping. The oil pumping amount of the variable frequency reciprocating compressor is related to the rotation speed of the compressor (that is, the rotation speed of the crankshaft). As the rotation speed increases, the oil pumping amount increases. In the related art, the low-speed oil pumping and high-speed oil pumping of the variable frequency reciprocating compressor often cannot meet the requirements at the same time. In some variable frequency reciprocating compressors, the low-speed oil pumping is appropriate and can meet the requirements, but the high-speed oil pumping cannot meet the requirements. There is often a problem of excessive high-speed oil pumping, which leads to an increase in the oil discharge of the compressor, which in turn leads to an increase in the input force of the compressor, and may bring the risk of discontinuous oil pumping. That is, the crankshaft in the related art cannot be well adapted to the wide range of speed changes of the variable frequency reciprocating compressor, that is, the adaptive oil pumping amount of the crankshaft in the related art is poor. Summary of the invention

[0003] The main purpose of the present invention is to provide a crankshaft of a compressor with the feature of adaptive pump oil quantity.

[0004] To achieve the above object, the crankshaft of the compressor proposed in the present invention comprises a main shaft and a secondary shaft connected to each other, wherein the main shaft has:

[0005] Oil guide channel;

[0006] an oil pump structure, comprising an oil inlet hole opened on the outer wall of the main shaft and connected to the oil guide channel, and a spiral oil groove located on the outer wall of the main shaft, wherein the lower end of the spiral oil groove is connected to the oil inlet hole, and the upper end is connected to the secondary shaft; and

[0007] The oil leakage structure comprises a first oil leakage hole which is opened on the outer wall of the main shaft and communicated with the oil guide channel. The position of the first oil leakage hole is higher than the position of the oil inlet hole and lower than the upper end position of the oil guide channel.

[0008] In one embodiment, the oil guide channel is coaxially arranged with the main shaft; and / or

[0009] The position of the first oil leakage hole is lower than the upper end position of the oil guide channel.

[0010] In one embodiment, the oil leakage structure further comprises an oil leakage groove located on the outer wall surface of the main shaft and one end of which is connected to the first oil leakage hole, and the oil leakage groove does not intersect with the spiral oil groove.

[0011] In one embodiment, the oil leakage structure further has a second oil leakage hole opened on the outer wall of the main shaft and connected to the oil guide channel. The position of the second oil leakage hole is higher than that of the first oil leakage hole and is connected to the other end of the oil leakage groove.

[0012] In one embodiment, an end of the oil drain groove away from the first oil drain hole is located below the first oil drain hole; or

[0013] One end of the oil drain groove away from the first oil drain hole is located below the oil inlet hole.

[0014] In one embodiment, the oil drain groove extends spirally, and the spiral direction of the oil drain groove is the same as the spiral direction of the spiral oil groove;

[0015] Alternatively, the oil drain groove extends along the axial direction of the main shaft.

[0016] In one embodiment, the oil leakage structure further has a second oil leakage hole opened on the outer wall of the main shaft and connected to the oil guide channel, the second oil leakage hole is connected to the other end of the oil leakage groove, and the height of the second oil leakage hole is the same as the height of the first oil leakage hole.

[0017] In one embodiment, the oil drain groove extends in a curved manner along the circumference of the main shaft.

[0018] In one embodiment, there are multiple oil drain grooves, and the multiple oil drain grooves are connected to the same first oil drain hole.

[0019] In one embodiment, the oil leakage structure further has a second oil leakage hole which is located higher than the oil inlet hole, is opened on the outer wall of the main shaft and is connected to the oil guide channel. The number of the second oil leakage holes is less than or equal to the number of the oil leakage grooves, and each of the second oil leakage holes is connected to an end of the oil leakage groove away from the first oil leakage hole.

[0020] In one embodiment, the number of the oil leakage structures is plural.

[0021] The present invention also provides a compressor, comprising the crankshaft.

[0022] The present invention also provides a household appliance, comprising the compressor.

[0023] When the crankshaft is working, after the lubricating oil in the oil guide channel reaches the first oil drain hole, the excess lubricating oil in the oil guide channel can be discharged through the first oil drain hole, thereby lowering the liquid level of the lubricating oil and reducing the thickness of the lubricating oil at the oil inlet hole, thereby preventing the amount of lubricating oil entering the spiral oil groove from being too high and always maintaining it below a certain fixed value, thereby achieving self-adaptation of the pumping oil amount. Therefore, the crankshaft has the characteristic of self-adaptation of the pumping oil amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of a crankshaft of a compressor according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 a perspective view of a crankshaft of a compressor is shown;

[0027] Figure 3 is a schematic diagram of the three-dimensional structure of a crankshaft of a compressor according to another embodiment of the present invention;

[0028] Figure 4 for Figure 3 a perspective view of a crankshaft of a compressor is shown;

[0029] Figure 5 is a schematic diagram of the three-dimensional structure of a crankshaft of a compressor according to another embodiment of the present invention;

[0030] Figure 6 for Figure 5 a perspective view of a crankshaft of a compressor is shown;

[0031] Figure 7 is a schematic diagram of the three-dimensional structure of a crankshaft of a compressor according to another embodiment of the present invention;

[0032] Figure 8 for Figure 7 a perspective view of a crankshaft of a compressor is shown;

[0033] Fig. 9 is a schematic diagram of the three-dimensional structure of a crankshaft of a compressor according to another embodiment of the present invention;

[0034] Fig.10 for Fig. 9 a perspective view of a crankshaft of a compressor is shown;

[0035] Fig.11 is a schematic diagram of the three-dimensional structure of a crankshaft of a compressor according to another embodiment of the present invention;

[0036] Fig.12 for Fig.11 A perspective view of the crankshaft of the compressor is shown.

[0037] Description of Figure Numbers:

[0038]

[0039]

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The present invention provides a crankshaft of a compressor.

[0045] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the crankshaft 10 of the compressor includes a main shaft 200, a balancing block 300 and a secondary shaft 400, and the main shaft 200, the balancing block 300 and the secondary shaft 400 are connected in sequence.

[0046] In this embodiment, the main shaft 200 includes an oil guiding structure 210 , an oil pumping structure 220 and an oil draining structure 230 .

[0047] The oil guide structure 210 has an oil guide passage 210 a . The oil guide passage 210 a is located inside the main shaft 200 and passes through the lower end of the main shaft 200 .

[0048] The oil pump structure 220 has an oil inlet hole 220a and a spiral oil groove 220b. The oil inlet hole 220a is opened on the outer wall surface of the main shaft 200, and the oil inlet hole 220a is connected to the oil guide channel 210a. At this time, it can be considered that the oil inlet hole 220a connects the external environment and the oil guide channel 210a. The spiral oil groove 220b is located on the outer wall surface of the main shaft 200, and the lower end of the spiral oil groove 220b is connected to the oil inlet hole 220a. The upper end of the spiral oil groove 220b is connected to the secondary shaft 400.

[0049] The oil leakage structure 230 has a first oil leakage hole 230a. The first oil leakage hole 230a is opened on the outer wall surface of the main shaft 200, and the first oil leakage hole 230a is connected to the oil guide channel 210a. At this time, it can be considered that the first oil leakage hole 230a connects the external environment and the oil guide channel 210a. The position of the first oil leakage hole 230a is higher than the position of the oil inlet hole 220a.

[0050] When the main shaft 200 rotates, centrifugal force is generated. Under the action of the centrifugal force, the lubricating oil at the bottom of the compressor housing climbs from the lower end of the main shaft 200 along the inner wall surface of the oil guiding channel 210a and enters the oil guiding channel 210a of the oil guiding structure 210. The lubricating oil in the oil guiding channel 210a is roughly in the shape of a parabola with an opening facing upward, the liquid level at the center is low, and the liquid level at the periphery is high, and the thickness of the lubricating oil gradually decreases from bottom to top.

[0051] After the lubricating oil in the oil guide channel 210a reaches the oil inlet hole 220a, the lubricating oil in the oil guide channel 210a can enter the spiral oil groove 220b through the oil inlet hole 220a, and climb upward along the spiral oil groove 220b under the action of the viscous force of the bearing wall, so that the lubricating oil can lubricate the crankshaft 10 and related moving pairs.

[0052] The compressor generates centrifugal force by rotating the crankshaft to pump oil. The amount of oil pumped is related to the rotation speed of the compressor (i.e., the rotation speed of the crankshaft 10). The amount of oil pumped increases as the rotation speed increases. Since the position of the first oil leakage hole 230a is higher than the position of the oil inlet hole 220a, when the lubricating oil in the oil guide channel 210a reaches the oil inlet hole 220a but does not reach the first oil leakage hole 230a, the rotation speed of the main shaft 200 is relatively low, the thickness of the lubricating oil at the oil inlet hole 220a is relatively small, and the amount of lubricating oil entering the spiral oil groove 220b through the oil inlet hole 220a is relatively small, which can meet the requirements of lubricating the crankshaft 10 and related kinematic pairs. At the same time, since the position of the first oil leakage hole 230a is higher than the position of the oil inlet hole 220a, when the lubricating oil in the oil guide channel 210a reaches the first oil leakage hole 230a, the rotation speed of the main shaft 200 is relatively high, and the thickness of the lubricating oil at the oil inlet hole 220a is relatively thick. If the first oil leakage hole 230a does not exist, the amount of lubricating oil entering the spiral oil groove 220b through the oil inlet hole 220a is relatively large, and the amount of oil entering the spiral oil groove 220b will exceed the required value, which will cause the oil discharge amount of the compressor to increase, thereby causing the input force of the compressor to increase, and may bring the risk of discontinuous oil pumping.

[0053] When the crankshaft 10 is working, after the lubricating oil in the oil guide channel 210a reaches the first oil drain hole 230a, the excess lubricating oil in the oil guide channel 210a can be discharged through the first oil drain hole 230a, thereby lowering the liquid level of the lubricating oil and reducing the thickness of the lubricating oil at the oil inlet hole 220a, thereby preventing the amount of lubricating oil entering the spiral oil groove 220b from being too high and always maintaining it below a certain fixed value, thereby achieving self-adaptation of the pumping oil amount. Therefore, the crankshaft 10 has the characteristic of self-adaptation of the pumping oil amount.

[0054] In this embodiment, the position of the first oil drain hole 230a is lower than the upper end of the oil guide channel 210a (in this embodiment, the position where the oil guide channel 210a is connected to the pressure relief channel 240a, the inner diameter of the oil guide channel 210a is larger than the inner diameter of the pressure relief channel 240a).

[0055] Normally, the speed range of the crankshaft 10 is determined at the time of leaving the factory, that is, the minimum speed and maximum speed of the crankshaft 10 are determined. In this embodiment, when the crankshaft 10 rotates at the minimum speed, the lubricating oil in the oil guide channel 210a can reach the oil inlet hole 220a; when the crankshaft 10 rotates at the maximum speed, the lubricating oil in the oil guide channel 210a can reach the upper end of the oil guide channel 210a. Therefore, in this embodiment, the position of the first oil drain hole 230a is set higher than the position of the oil inlet hole 220a, and the position of the first oil drain hole 230a is set lower than the upper end position of the oil guide channel 210a, which can ensure that the first oil drain hole 230a has the ability to discharge excess lubricating oil. Moreover, in practical applications, the distance between the first oil drain hole 230a and the upper end of the oil guide channel 210a can be determined according to actual needs to meet different application requirements. For example, at the same rotation speed, if more lubricating oil is desired to be discharged through the first oil drain hole 230a, the distance between the first oil drain hole 230a and the upper end of the oil guide channel 210a can be increased.

[0056] In this embodiment, the bottom of the compressor housing has a certain depth of lubricating oil. The lower end of the main shaft 200 (that is, the end of the main shaft 200 away from the secondary shaft 400) can be connected to the oil suction pump, and the oil suction hole at the lower end of the oil suction pump is connected to the oil guide channel 210a, so that when the lower end of the oil suction pump is immersed in the lubricating oil at the bottom of the compressor housing, the crankshaft 10 rotates and drives the oil suction pump to rotate, generating centrifugal force, so that the lubricating oil at the bottom of the compressor housing can be pumped into the oil guide channel 210a of the oil guide structure 210 of the main shaft 200 through the oil suction hole of the oil suction pump. Specifically, in this embodiment, the upper end of the oil suction pump is plugged into the lower end of the main shaft 200, and the upper end of the oil suction pump is plugged into the oil guide channel 210a of the main shaft 200, or the lower end of the main shaft 200 is plugged into the cavity of the oil suction pump. It is understandable that in other embodiments, an oil suction hole communicating with the oil guide channel 210 a may be directly formed at the lower end of the main shaft 200 . In this case, the oil suction pump may be omitted.

[0057] In this embodiment, the main shaft 200 further has a first separation channel 200a, which is located inside the main shaft 200. The balancing block 300 has a second separation channel 300a, which is located inside the balancing block 300. The secondary shaft 400 has a third separation channel 400a, which is located inside the secondary shaft 400. The second separation channel 300a communicates with the third separation channel 400a and the first separation channel 200a. The third separation channel 400a runs through the upper end of the secondary shaft 400. The oil pump structure 220 further has an oil outlet 220c. The upper end of the spiral oil groove 220b is communicated with the oil outlet 220c, and the lower end of the first separation channel 200a is communicated with the oil outlet 220c. In this way, it is very convenient to pump the lubricating oil to the third separation channel 400a, that is, to the secondary shaft 400, through the spiral oil groove 220b, the first separation channel 200a and the second separation channel 300a in sequence, so as to lubricate the moving parts of the compressor.

[0058] In this embodiment, it can be considered that the crankshaft 10 has a separation channel located inside the crankshaft 10, and the separation channel includes a first separation channel 200a, a second separation channel 300a, and a third separation channel 400a. Part of the separation channel is located inside the secondary shaft 400 and passes through the upper end of the secondary shaft 400, part of the separation channel is located in the balance block 300, and part of the separation channel is located in the main shaft 200 and communicates with the upper end of the spiral oil groove 220b.

[0059] In the present embodiment, the main shaft 200 also includes a pressure relief structure 240. The pressure relief structure 240 has a pressure relief channel 240a. The pressure relief channel 240a is located inside the main shaft 200, and the lower end of the pressure relief channel 240a is connected to the upper end of the oil guide channel 210a. In this way, when the crankshaft 10 rotates, the lubricating oil enters the oil guide channel 210a and occupies the space of the oil guide channel 210a, and the gas in the oil guide channel 210a is squeezed into the pressure relief channel 240a and discharged through the pressure relief channel 240a. In this way, it is very convenient for the lubricating oil to enter the oil guide channel 210a. Specifically, in the present embodiment, the diameter of the pressure relief channel 240a is smaller than the diameter of the oil guide channel 210a. In this way, while ensuring effective pressure relief, the main shaft 200 can have better rigidity, thereby having a longer service life.

[0060] In this embodiment, the balancing block 300 also has a pressure relief hole 300b. The pressure relief hole 300b is located inside the balancing block 300, and the pressure relief hole 300b runs through the upper and lower sides of the balancing block 300. The lower end of the pressure relief hole 300b is connected to the pressure relief channel 240a. In this way, the gas in the oil guide channel 210a can be discharged through the pressure relief channel 240a and the pressure relief hole 300b in sequence. It can be understood that in other embodiments, the pressure relief hole 300b can also be located on the secondary shaft 400 or on the upper part of the main shaft 200.

[0061] In this embodiment, the oil guide channel 210a is coaxially arranged with the main shaft 200. Thus, when the crankshaft 10 rotates, it is more convenient for the lubricating oil to climb along the inner wall surface of the oil guide channel 210a and enter the oil guide channel 210a of the oil guide structure 210.

[0062] In this embodiment, the oil drain structure 230 further has an oil drain groove 230b. The oil drain groove 230b is located on the outer wall surface of the main shaft 200, and one end of the oil drain groove 230b is connected to the first oil drain hole 230a. The oil drain groove 230b connected to the first oil drain hole 230a can guide the lubricating oil flowing out from the first oil drain hole 230a, thereby reducing the resistance of the lubricating oil flowing out, which is more conducive to the lubricating oil flowing out, that is, more conducive to the oil drain structure 230 oil drain. It can be understood that in other embodiments, the oil drain groove 230b can be omitted.

[0063] In this embodiment, the oil drain groove 230b does not intersect with the spiral oil groove 220b, so as to prevent the lubricating oil flowing out of the first oil drain hole 230a from entering the spiral oil groove 220b through the oil drain groove 230b.

[0064] In some embodiments, Figure 1-Figure 4 As shown, the oil leakage structure 230 also has a second oil leakage hole 230c. The second oil leakage hole 230c is opened on the outer wall surface of the main shaft 200, and the second oil leakage hole 230c is connected to the oil guide channel 210a. At this time, it can be considered that the second oil leakage hole 230c is connected to the external environment and the oil guide channel 210a. The position of the second oil leakage hole 230c is higher than the position of the first oil leakage hole 230a, and the second oil leakage hole 230c is connected to the other end of the oil leakage groove 230b. That is, in this embodiment, the lower end of the oil leakage groove 230b is connected to the first oil leakage hole 230a, and the upper end of the oil leakage groove 230b is connected to the second oil leakage hole 230c. In this way, when the crankshaft 10 rotates, the lubricating oil discharged from the first oil drain hole 230a climbs upward along the oil drain groove 230b to the second oil drain hole 230c under the action of the viscous force of the bearing wall, and returns to the oil guide channel 210a through the second oil drain hole 230c, which makes it very convenient for the lubricating oil to return to the bottom of the compressor casing again.

[0065] In this embodiment, if Figure 1-Figure 4 As shown, the second oil leakage hole 230c is indirectly connected to the oil guide channel 210a through the pressure relief channel 240a. That is, in this embodiment, the second oil leakage hole 230c is directly connected to the pressure relief channel 240a. It can be understood that in other embodiments, the second oil leakage hole 230c can also be directly connected to the oil guide channel 210a.

[0066] Specifically, in some embodiments, Figure 1 and Figure 2As shown, the oil drain groove 230b extends in a spiral direction, and the spiral direction of the oil drain groove 230b is the same as the spiral direction of the spiral oil groove 220b. In this way, the resistance of the lubricating oil climbing upward along the oil drain groove 230b can be reduced, and it is more conducive to the lubricating oil discharged from the first oil drain hole 230a to climb upward along the oil drain groove 230b to the second oil drain hole 230c. Specifically, in this embodiment, the spiral direction of the oil drain groove 230b and the spiral direction of the spiral oil groove 220b are both counterclockwise. Among them, the oil drain groove 230b and the spiral oil groove 220b are both counterclockwise upward spirals.

[0067] Specifically, in some embodiments, Figure 3 and Figure 4 As shown, the oil drain groove 230b extends along the axial direction of the main shaft 200. That is, in this embodiment, the oil drain groove 230b extends along the vertical direction. In this way, it is easier to form the oil drain structure 230.

[0068] In some embodiments, Figure 5-Figure 8 As shown, one end of the oil drain groove 230b away from the first oil drain hole 230a is located below the first oil drain hole 230a. In this way, when the crankshaft 10 rotates, the lubricating oil discharged from the first oil drain hole 230a is discharged along the oil drain groove 230b under the dual effects of the viscosity of the bearing wall and gravity, which is more conducive to the discharge of the lubricating oil from the first oil drain hole 230a.

[0069] exist Figure 5-Figure 8 In the illustrated embodiment, the end of the oil drain groove 230b away from the first oil drain hole 230a is also located below the oil inlet hole 220a. In this way, it can be ensured that the oil drain groove 230b has a relatively long length and can better guide the lubricating oil. In addition, the second oil drain hole 230c can be omitted at this time, so that the end of the oil drain groove 230b away from the first oil drain hole 230a is directly in contact with the external environment. In this way, it can be prevented that the lubricating oil leaks through the second oil drain hole 230c in advance before climbing up to the oil inlet hole 220a, and omitting the second oil drain hole 230c can make the oil drain structure 230 simpler and easier to form.

[0070] Specifically, in some embodiments, Figure 5 and Figure 6 As shown, the oil drain groove 230b extends in a spiral direction, and the spiral direction of the oil drain groove 230b is the same as the spiral direction of the spiral oil groove 220b. In this way, the resistance of the lubricating oil climbing upward along the oil drain groove 230b can be reduced, and the lubricating oil discharged from the first oil drain hole 230a is more conducive to being discharged along the oil drain groove 230b. Specifically, in this embodiment, the spiral direction of the oil drain groove 230b and the spiral direction of the spiral oil groove 220b are both counterclockwise, wherein the oil drain groove 230b is a downward counterclockwise spiral, and the spiral oil groove 220b is an upward counterclockwise spiral.

[0071] Specifically, in some embodiments, Figure 7 and Figure 8 As shown, the oil drain groove 230b extends along the axial direction of the main shaft 200. That is, in this embodiment, the oil drain groove 230b extends along the vertical direction. In this way, it is easier to form the oil drain structure 230.

[0072] In some embodiments, Fig. 9 and Fig.10 As shown, the oil drain structure 230 also has the second oil drain hole 230c mentioned above. The height of the second oil drain hole 230c is the same as that of the first oil drain hole 230a. In this way, when the crankshaft 10 rotates, the lubricating oil discharged from the first oil drain hole 230a moves circumferentially along the oil drain groove 230b to the second oil drain hole 230c under the action of the viscous force of the bearing wall, and returns to the oil guide channel 210a again through the second oil drain hole 230c. Specifically, Figure 8 In the illustrated embodiment, the oil drain groove 230b is curved and extends along the circumference of the main shaft 200, that is, the oil drain groove 230b is a horizontal counterclockwise spiral, that is, the oil drain groove 230b is a counterclockwise spiral along the horizontal direction.

[0073] In some embodiments, Fig.11 and Fig.12 As shown, there are multiple (or more than or equal to two) oil drain grooves 230b, and the multiple oil drain grooves 230b are connected to the same first oil drain hole 230a. In this way, it is more conducive to reducing the resistance of the lubricating oil outflow, and more conducive to the lubricating oil outflow, that is, it is more conducive to the oil drain structure 230 to drain oil. Specifically, as Fig.11 and Fig.12 As shown, in this embodiment, the oil leakage structure 230 also has the above-mentioned second oil leakage holes 230c. The number of the second oil leakage holes 230c is less than or equal to the number of the oil leakage grooves 230b, and each of the second oil leakage holes 230c is connected to an end of an oil leakage groove 230b away from the first oil leakage hole 230a. At this time, it can be considered that Fig.11 and Fig.12 The embodiment shown has the above Figure 1-Figure 10 The plurality of oil leakage structures 230 share the same first oil leakage hole 230a. Specifically, Fig.11 and Fig.12 The embodiment shown has the above Figure 1 and Figure 2 The oil drain structure 230 and Figure 3 and Figure 4 In the illustrated embodiment, the two oil leakage structures 230 share the same first oil leakage hole 230a, so that not only the oil leakage effect can be further improved, but also because the same first oil leakage hole 230a is shared, the number of first oil leakage holes 230a can be reduced, which is more conducive to the manufacture of the crankshaft 10.

[0074] It is understood that in other embodiments, the crankshaft 10 may also have a plurality of identical oil drain structures 230. For example, the crankshaft 10 may have two Figure 1 and Figure 2 The oil drain structure 230 shown in the figure, for example, the crankshaft 10 may have three Figure 3 and Figure 4 The oil drainage structure 230 shown, etc.

[0075] The present invention further provides a compressor, which includes the above-mentioned crankshaft 10. The specific structure of the crankshaft 10 refers to the above-mentioned embodiment. Since the present compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. Specifically, in this embodiment, the compressor is a variable frequency reciprocating compressor.

[0076] The present invention also provides a household appliance. The household appliance includes the above compressor. In some embodiments, the household appliance is a refrigerator. In some embodiments, the household appliance is an air conditioner.

[0077] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A crankshaft of a compressor, comprising a main shaft and a secondary shaft connected to each other, characterized in that: The main shaft has: Oil guide channel; an oil pump structure, comprising an oil inlet hole opened on the outer wall of the main shaft and connected to the oil guide channel, and a spiral oil groove located on the outer wall of the main shaft, wherein the lower end of the spiral oil groove is connected to the oil inlet hole, and the upper end is connected to the secondary shaft; and The oil leakage structure comprises a first oil leakage hole opened on the outer wall surface of the main shaft and connected to the oil guide channel, an oil leakage groove located on the outer wall surface of the main shaft and connected to the first oil leakage hole at one end, and a second oil leakage hole opened on the outer wall surface of the main shaft and connected to the oil guide channel, wherein the position of the first oil leakage hole is higher than the position of the oil inlet hole, the oil leakage groove does not intersect with the spiral oil groove, and the second oil leakage hole is connected to the other end of the oil leakage groove.

2. The crankshaft of the compressor according to claim 1, characterized in that The oil guide channel is coaxially arranged with the main shaft; and / or The position of the first oil leakage hole is lower than the upper end position of the oil guide channel.

3. The crankshaft of the compressor according to claim 1, characterized in that: The position of the second oil leakage hole is higher than that of the first oil leakage hole.

4. The crankshaft of the compressor according to claim 1, characterized in that One end of the oil drain groove away from the first oil drain hole is located below the first oil drain hole; or One end of the oil drain groove away from the first oil drain hole is located below the oil inlet hole.

5. The crankshaft of the compressor according to claim 4, characterized in that: The oil drain groove extends spirally, and the spiral direction of the oil drain groove is the same as the spiral direction of the spiral oil groove; Alternatively, the oil drain groove extends along the axial direction of the main shaft.

6. The crankshaft of the compressor according to claim 1, characterized in that The height of the second oil leakage hole is the same as the height of the first oil leakage hole.

7. The crankshaft of the compressor according to claim 6, characterized in that The oil drain groove is bent and extends along the circumferential direction of the main shaft.

8. The crankshaft of the compressor according to claim 1, characterized in that There are multiple oil drain grooves, and the multiple oil drain grooves are connected to the same first oil drain hole.

9. The crankshaft of the compressor according to claim 8, characterized in that The number of the second oil leakage holes is less than or equal to the number of the oil leakage grooves, and each of the second oil leakage holes is communicated with an end of the oil leakage groove away from the first oil leakage hole.

10. The crankshaft of a compressor according to any one of claims 1 to 9, characterized in that: The number of the oil leakage structures is multiple.

11. A compressor, characterized in that: Comprising a crankshaft as claimed in any one of claims 1 to 10.

12. A household appliance, characterized in that: Comprising the compressor of claim 11.

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