Crankcase, compressor and household appliance

Abstract

The utility model discloses a crankcase, compressor and household appliance, crankcase includes: crankshaft seat, the shaft hole for installing crankshaft is equipped with to crankshaft seat, and the boss that surrounds the edge ring of shaft hole is equipped, crankshaft seat is equipped with oil storage groove and a plurality of oil leakage holes still, and the circumferential ring of oil storage groove is equipped around the boss, and a plurality of oil leakage holes are arranged on the outside of oil storage groove, and the oil discharge port is formed between oil storage groove and the at least part of a plurality of oil leakage holes. The utility model discloses through setting up the oil storage groove that surrounds the ring of shaft hole and the oil storage groove intercommunication on the crankshaft seat, and the oil storage groove can store the certain amount of circulating flow's refrigeration oil for the crankshaft cooling lubrication, can guarantee the oil amount of the position where crankshaft is at is sufficient, promotes the cooling lubrication effect of crankcase to crankshaft, reduces the risk that crankshaft takes place unusual abrasion or is dead -locked, and can reduce the material of crankcase and reduce the weight, and realize light weight design.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a crankcase, compressor and household appliance. Background Technology

[0002] In related technologies, during the operation of a reciprocating compressor, the crankshaft rotation pumps refrigerant oil from the bottom of the lower housing via a spiral or centrifugal oil pump assembly. This oil is then pumped upwards along the crankshaft's inner bore and surface oil grooves, and finally ejected from the crankshaft's auxiliary shaft, lubricating the entire pump body structure. Due to the relatively complex structure and large surface area of ​​the crankcase, a significant amount of refrigerant oil is collected and stored. Some of this oil accumulates on the thrust surface around the shaft bore and flows directly downwards through the drain holes, making it difficult to store enough oil for lubrication of the upper part of the shaft bore. Another type of crankcase has no drain holes around the shaft bore (or only one drain hole). This results in a large accumulation of refrigerant oil around the shaft bore, which cannot be promptly returned to the bottom of the lower housing for circulation, leading to insufficient oil supply. This results in poor lubrication of moving parts, potentially causing abnormal wear or seizing. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a crankcase that improves the cooling and lubrication of the crankcase shaft system, enhances the cooling and lubrication effect, and thus improves the reliability of the compressor shaft system.

[0004] This invention also aims to provide a compressor that utilizes the aforementioned crankcase.

[0005] This invention also aims to provide a household appliance that uses the aforementioned compressor.

[0006] A crankcase according to an embodiment of the present invention, for mounting a crankshaft of a compressor, includes: a crankshaft seat, the crankshaft seat having a shaft hole for mounting the crankshaft, and a boss circumferentially disposed around the edge of the shaft hole, the crankshaft seat also having an oil reservoir and a plurality of oil drain holes, the oil reservoir being circumferentially disposed around the boss, the plurality of oil drain holes being disposed on the outer side of the oil reservoir, and an oil discharge port being formed between at least a portion of the oil reservoir and the plurality of oil drain holes.

[0007] According to the present invention, the crankcase has an oil reservoir surrounding the shaft hole and a connecting oil reservoir on the crankshaft seat. The oil reservoir can store a certain amount of circulating refrigeration oil for crankshaft cooling and lubrication. This ensures sufficient oil supply at the crankshaft location, improves the cooling and lubrication effect of the crankcase on the crankshaft, reduces the risk of abnormal wear or seizure of the crankshaft, and reduces the amount of material used in the crankcase and its weight, thus achieving a lightweight design.

[0008] In some embodiments of this utility model, the crankcase further includes a cylinder body, which is connected to the crankshaft seat. The cylinder body is provided with a cylinder bore, and the axial directions of the cylinder bore and the shaft bore are perpendicular to each other. One of the plurality of oil leakage holes is located between the cylinder bore and the shaft bore, and forms the oil discharge port between the cylinder bore and the oil reservoir.

[0009] In some embodiments of this utility model, the crankshaft seat is provided with two reinforcing ribs, which are located on opposite sides of the shaft hole and the cylinder body. The reinforcing ribs extend along the outer edge of the crankshaft seat and connect to the cylinder body. An clearance opening is formed between the ends of the two reinforcing ribs away from the cylinder body. The crankshaft seat is provided with a fan-shaped area corresponding to the clearance opening, and a plurality of oil leakage holes are located outside the fan-shaped area.

[0010] In some embodiments of this utility model, at least one of the plurality of oil leakage holes is disposed between the reinforcing rib and the oil storage tank.

[0011] In some embodiments of this utility model, the outer surface of the reinforcing rib is flush with or adjacent to the outer surface of the crankshaft seat, the oil leakage hole has an outer hole wall away from the shaft hole, the outer hole wall is flush with or adjacent to the inner surface of the adjacent reinforcing rib, and in the radial direction of the shaft hole, the width of the oil leakage hole is less than or equal to the width of the oil storage groove.

[0012] In some embodiments of this utility model, the oil leakage hole is an arc-shaped hole concentric with the shaft hole, and the central angle of the oil leakage hole is 30 degrees to 60 degrees.

[0013] In some embodiments of this utility model, the depth of the oil storage tank is 0.5mm to 5mm.

[0014] In some embodiments of this utility model, the inner annular groove surface of the oil storage tank is connected to the outer peripheral surface of the boss; or, the inner annular groove surface of the oil storage tank is connected to the boss with a chamfered transition or a rounded transition.

[0015] In some embodiments of the present invention, a compressor according to an embodiment of the present invention includes a crankcase as described in any of the preceding descriptions.

[0016] According to the present invention, the compressor using the crankcase of the compressor can enhance the cooling and lubrication effect on the crankshaft, prevent abnormal wear or seizing of the crankshaft, ensure long-term stable operation of the compressor, improve the working reliability of the compressor, and reduce the material cost of the compressor.

[0017] A household appliance according to an embodiment of the present invention includes a compressor as described above.

[0018] According to the embodiments of the present invention, the use of compressor 1000 in the household appliance can reduce manufacturing costs and improve the operational reliability of the household appliance.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A three-dimensional structural schematic diagram of a crankcase provided for some embodiments of this utility model; Figure 2 A top view of a crankcase provided for some embodiments of this utility model; Figure 3 for Figure 1 A magnified view of part I; Figure 4 A cross-sectional view of a compressor provided for some embodiments of this utility model.

[0021] Figure label: 1000, Compressor; 100. Crankcase; 10. Crankshaft seat; 101. Shaft hole; 102. Boss; 103. Oil reservoir; 1032. Outer ring groove surface; 1033. Oil discharge port; 10331. Second bottom surface; 1034. First bottom surface; 104. Oil leakage hole; 1041. Outer hole wall; 105. Outer surface surface; 20. Cylinder block; 201. Cylinder bore; 30. Reinforcing rib; 301. Outer rib surface; 302. Inner rib surface; 40. Clearance opening; 50. Fan-shaped area; 200, crankshaft; 210, cage; 300, compressor housing; 400, cylinder; 500, muffler. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The crankcase 100 of this utility model embodiment is applied to the compressor 1000 and is used to mount the crankshaft 200 of the compressor 1000.

[0025] The following is for reference. Figures 1-3 The present invention describes a crankcase 100 according to an embodiment of the present invention.

[0026] like Figures 1 to 3 As shown, a crankcase 100 according to an embodiment of the present invention includes a crankshaft seat 10. The crankshaft seat 10 is provided with a shaft hole 101 for mounting a crankshaft 200 and a boss 102 circumferentially arranged around the edge of the shaft hole 101. The crankshaft seat 10 is also provided with an oil reservoir 103 and a plurality of oil drain holes 104. The oil reservoir 103 is circumferentially arranged around the boss 102. The plurality of oil drain holes 104 are provided on the outside of the oil reservoir 103. An oil discharge port 1033 is formed between the oil reservoir 103 and at least a portion of the plurality of oil drain holes 104.

[0027] In the above technical solution, the oil reservoir 10 and the oil drain hole 104 form a cooling and lubrication structure on the crankcase 100, and the oil reservoir 103 is formed on the thrust surface of the crankshaft seat 10. After the refrigerant oil pumped up by the crankshaft 200 is thrown down, some of the refrigerant oil can flow into the oil reservoir 103 and be stored. The crankshaft 200 can be supported on the annular groove surface of the oil reservoir 10 by the cage 210 (see...). Figure 4At this point, the annular groove surface of the oil reservoir 10 acts as a thrust surface, ensuring it remains constantly lubricated with refrigerant oil. When the crankshaft 200 is working, the retainer 210 carries the refrigerant oil into the shaft hole 101, thus lubricating the crankshaft 200 and keeping it in a state of cooling and lubrication for an extended period, preventing abnormal wear and seizing. Since the oil reservoir 103 is connected to the drain hole 104 via the drain port 1033, the refrigerant oil in the oil reservoir 103 can flow out from the drain hole 10 along the drain port 1033. This ensures the refrigerant oil in the oil reservoir 103 is in a circulating state, with newly pumped refrigerant oil continuously replenishing it while old refrigerant oil continuously flows out. This removes any foreign matter or impurities, preventing them from entering between the crankshaft 200 and the shaft hole 101 and causing seizing when the refrigerant oil in the oil reservoir 103 is lubricating the crankshaft 200. Secondly, the oil drain hole 10 can also allow the refrigeration oil to flow quickly to the bottom of the compressor housing and rejoin the circulating pump oil at the bottom of the compressor housing 300, thereby ensuring the amount of circulating pump oil.

[0028] It should also be noted that since the crankshaft housing 10 has an oil reservoir 103 and an oil leakage hole 10, this reduces the amount of material used in the crankcase 100 and also reduces the weight of the crankcase 100, thus achieving a lightweight design of the crankcase 100 and consequently a lightweight design of the compressor 1000.

[0029] Multiple oil leakage holes 104 can be arranged around the circumference of the oil storage tank 103, and they can be arranged at equal intervals or at non-equal intervals. For example, refer to Figure 1 There are three oil drain holes 104, and the oil reservoir 103 can be connected to only one of them through the oil discharge port 1033. This prevents the refrigerant oil from flowing out too quickly and prolongs the residence time of the refrigerant oil in the oil reservoir 103. It is understood that the number of oil discharge ports 1033 formed between the oil reservoir 103 and the multiple oil drain holes 104 can be set as needed, and no specific limitation is made here. By setting multiple oil drain holes 104, the oil drainage capacity of the crankshaft seat 10 can be improved, and the refrigerant oil is prevented from accumulating in large quantities on the crankshaft seat 10. This allows more refrigerant oil to drain quickly to the bottom of the compressor housing 300, so as to ensure the circulation pump oil volume of the compressor 1000.

[0030] According to the embodiment of the present utility model, the crankcase 100 is provided with an oil reservoir 103 surrounding the shaft hole 101 on the crankshaft seat 10 and a connecting oil reservoir 103. The oil reservoir 103 can store a certain amount of circulating refrigeration oil for cooling and lubrication of the crankshaft 200. This can ensure sufficient oil at the location of the crankshaft 200, improve the cooling and lubrication effect of the crankcase 100 on the crankshaft 200, reduce the risk of abnormal wear or seizure of the crankshaft 200, and reduce the material used and weight of the crankcase 100, thus achieving a lightweight design.

[0031] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the crankcase 100 also includes a cylinder block 20, which is connected to the crankshaft seat 10. The cylinder block 20 is provided with a cylinder bore 201. The axial directions of the cylinder bore 201 and the shaft bore 101 are perpendicular to each other. One of the multiple oil leakage holes 104 is located between the cylinder bore 201 and the shaft bore 101, and forms an oil discharge port 1033 between the oil reservoir 103 and the oil discharge port 103.

[0032] The cylinder block 20 refers to the support structure used to install the cylinder piston. The cylinder bore 201 is used to install the piston. To ensure the structural strength of the crankcase 100 itself, while ensuring the oil drainage capacity of the oil reservoir 103, the weakening effect caused by the oil drain port 1033 should also be considered. Therefore, the number of oil drain ports 1033 should not be too large. When a small number of oil drain ports 1033 are used, such as only one, the oil drain port 1033 should be located at least on the oil leakage hole 104 between the cylinder bore 201 and the shaft bore 101. This facilitates the timely drainage of refrigerant oil at the location of the cylinder bore 201, preventing excessive oil from the piston inside the cylinder bore 201, which would affect refrigerant exhaust. For example, if the piston carries too much oil, the refrigerant gas containing refrigerant oil will reduce the refrigerant content and affect the compressor's cooling capacity.

[0033] In some embodiments of this utility model, such as Figures 1 to 3 As shown, the crankshaft seat 10 is provided with two reinforcing ribs 30. The two reinforcing ribs 30 are provided on opposite sides of the shaft hole 101 and the cylinder body 20. The reinforcing ribs 30 extend along the outer edge of the crankshaft seat 10 and connect to the cylinder body 20. A clearance opening 40 is formed between the ends of the two reinforcing ribs 30 away from the cylinder body 20. The crankshaft seat 10 is provided with a fan-shaped area 50 corresponding to the clearance opening 40. Multiple oil leakage holes 104 are provided outside the fan-shaped area 50.

[0034] In the above technical solution, by setting two reinforcing ribs 30 on opposite sides of the shaft hole 101 and the cylinder block 20, the crankshaft seat 10, the cylinder block 20, and the two reinforcing ribs 30 can form a structure with higher structural strength, thereby improving the structural strength of the crankcase 100. The clearance 40 formed between the two reinforcing ribs 30 can be used to avoid other components inside the compressor 1000. Since the clearance 40 is directly opposite the cylinder hole 201, and multiple oil leakage holes 104 are located on the outer side of the fan-shaped area 50, there is only one oil leakage hole 104 in the axial direction of the cylinder hole 201. This avoids the impact of the oil leakage hole 104 on the structural strength of the cylinder hole 201, ensuring the structural strength of the location of the cylinder hole 201.

[0035] In some embodiments of this utility model, such as Figure 1 and Figure 2As shown, at least one of the plurality of oil leakage holes 104 is located between the reinforcing rib 30 and the oil reservoir 103. In the above technical solution, in addition to one of the plurality of oil leakage holes 104 being located at the position of the cylinder bore 201, at least one is also located between the reinforcing rib 30 and the oil reservoir 103, for example, referring to... Figure 1 and Figure 2 Each reinforcing rib 30 and oil reservoir 103 is provided with an oil drain hole 104. This structure increases the number of oil drain holes 104 and enhances the oil drainage capacity of the crankcase 100.

[0036] In some embodiments of this utility model, such as Figure 1 As shown, the outer rib surface 301 of the reinforcing rib 30 is flush with or adjacent to the outer surface 105 of the crankshaft seat 10. The oil leakage hole 104 has an outer hole wall 1041 away from the shaft hole 101. The outer hole wall 1041 is flush with or adjacent to the inner rib surface 302 of the adjacent reinforcing rib 30. In the radial direction of the shaft hole 101, the hole width of the oil leakage hole 104 is less than or equal to the groove width of the oil reservoir 103.

[0037] The outer surface 301 of the reinforcing rib 30 and the outer surface 105 of the crankshaft seat 10 can be flush, that is, the outer surface 301 and the outer surface 105 are coplanar. Alternatively, the outer surface 301 of the reinforcing rib 30 and the outer surface 105 of the crankshaft seat 10 can be adjacent to each other. The outer hole wall 1041 and the inner surface 302 of the adjacent reinforcing rib 30 can be flush, that is, the outer hole wall 1041 and the inner surface 302 are coplanar. Alternatively, the outer hole wall 1041 and the inner surface 302 of the adjacent reinforcing rib 30 can be adjacent to each other.

[0038] The above structure allows for a more compact distribution of the reinforcing ribs 30, oil drain holes 104, and oil reservoirs 103 on the crankshaft housing 10. This increases the width of the oil drain holes 104 and the width of the oil reservoirs 103, thereby increasing the oil storage capacity of the oil reservoirs 103. This allows for the storage of more refrigerant oil, enhancing the cooling and lubrication effect of the oil reservoirs 103 on the crankshaft 200. The larger width of the oil drain holes 104 also enhances the oil drainage capacity, facilitating the timely drainage of refrigerant oil to the bottom of the compressor housing. If the width of the oil drain holes 104 is less than or equal to the width of the oil reservoirs 103, the storage capacity of the oil reservoirs 103 is superior to the drainage capacity of the oil drain holes 104, resulting in better cooling and lubrication. Furthermore, the larger widths of the oil drain holes 104 and the oil reservoirs 103 further reduce the material used in the crankcase 100, reducing its weight and contributing to a lightweight design.

[0039] In some embodiments of this utility model, such as Figure 3As shown, the wall thickness between the oil drain hole 104 and the oil reservoir 103 is T, where 1 mm ≤ T. That is, T can be, but is not limited to, 1 mm, 1.2 mm, 1.5 mm, 2 mm, 2.2 mm, 2.5 mm, 3 mm, etc. This structure ensures the structural strength between the oil drain hole 104 and the oil reservoir 103, preventing breakdown during manufacturing and improving the manufacturability of the crankcase 100.

[0040] In some embodiments of this utility model, such as Figure 2 As shown, the oil leakage hole 104 is an arc-shaped hole concentric with the shaft hole 101, and the central angle of the oil leakage hole 104 is 30 degrees to 60 degrees. (Reference) Figure 2 The central angle of the oil drain hole 104 can be α, which can be, but is not limited to, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, etc. By setting the central angle of the oil drain hole 104 within the above range, the oil drain hole 104 can have an appropriate arc length on the crankshaft seat 10, thereby enhancing the oil leakage capacity of the oil drain hole 104 and ensuring that the refrigerant oil can quickly leak to the bottom of the compressor housing.

[0041] In some embodiments of this utility model, such as Figure 3 As shown, the oil storage tank 103 has a first bottom surface 1034, and the oil discharge port 1033 has a second bottom surface 10331. The second bottom surface 10331 is flush with the first bottom surface 1034, or the second bottom surface 10331 is lower than the first bottom surface 1034. With the above structure, the refrigeration oil in the oil storage tank 103 can flow more smoothly from the oil discharge port 1033 to the oil leakage hole 104, which can effectively prevent foreign objects or impurities from remaining in the oil storage tank 103 and enhance the oil and slag discharge effect of the oil storage tank 103.

[0042] In some embodiments of this utility model, the depth of the oil storage tank 103 is 0.5mm to 5mm. The depth of the oil storage tank 103 can be, but is not limited to, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. By setting the depth of the oil storage tank 103 within the above range, the oil storage tank 103 can have a suitable oil storage capacity, avoiding the situation where too much refrigerant oil is stored, preventing it from returning to the bottom of the compressor housing 300 in time, and avoiding the situation where too little refrigerant oil is stored, resulting in insufficient cooling and lubrication effects.

[0043] In some embodiments of this utility model, the inner annular groove surface of the oil reservoir 103 is flush with the outer peripheral surface of the boss 102. The inner annular groove surface can refer to the side groove surface of the oil reservoir 103 that is closer to the shaft hole 101 than the outer annular groove surface 1032. This technical solution can make full use of the space on the crankshaft seat 10, making the arrangement of the oil reservoir 103 and the shaft hole 101 more compact, thereby making the groove width of the oil reservoir 103 as large as possible, which can increase the oil storage capacity of the oil reservoir 103, improve the cooling and lubrication effect, and further reduce the material used in the crankcase 100 and reduce the weight of the crankcase 100.

[0044] In some embodiments of this invention, the inner annular groove surface of the oil storage tank 103 is connected to the boss 102 via a chamfered transition or a circular arc transition. This method allows for a smoother transition between the inner annular groove surface of the oil storage tank 103 and the boss 102, which helps reduce the risk of stress concentration.

[0045] The following is combined with Figures 1 to 3 This describes a specific embodiment of the crankcase 100 of the present invention.

[0046] The crankcase 100 includes a crankshaft seat 10 and a cylinder block 20. The cylinder block 20 is connected to the crankshaft seat 10, and the cylinder block 20 is provided with a cylinder bore 201. The axial directions of the cylinder bore 201 and the shaft bore 101 are perpendicular to each other.

[0047] The crankshaft housing 10 is provided with a shaft hole 101 for mounting the crankshaft 200, and a boss 102 surrounding the edge of the shaft hole 101. The crankshaft housing 10 is also provided with an oil reservoir 103 and an oil leakage hole 104. The oil reservoir 103 is circumferentially arranged around the boss 102, and the inner ring groove surface of the oil reservoir 103 is flush with the outer circumferential surface of the boss 102. Three oil leakage holes 104 are provided on the outside of the oil reservoir 103. One oil leakage hole 104 is located between the shaft hole 101 and the cylinder hole 201, and an oil discharge port 1033 is provided between the outer annular groove surface 1032 of the oil reservoir 103 and the oil leakage hole 104 at this location. The oil discharge port 1033 connects the oil leakage hole 104 and the oil reservoir 103. The other two oil leakage holes 104 are located on opposite sides of the shaft hole 101 and on both sides of the axial direction of the cylinder hole 201. These two oil leakage holes 104 are not connected to the oil reservoir 103.

[0048] The crankcase 100 of the above embodiment can be applied to a reciprocating piston compressor. During operation, the crankshaft 200 rotates, pumping refrigerant oil from the bottom of the lower housing via a spiral oil pump assembly or a centrifugal oil pump assembly. The oil is pumped upwards along the crankshaft inner bore and surface oil grooves, and finally, the refrigerant oil is thrown out from the crankshaft countershaft, lubricating the entire pump body structure surface. Because the crankcase 100 has a relatively complex structure and a large surface area, it receives and stores a significant amount of refrigerant oil, some of which converges on the thrust surface around the shaft hole. This invention incorporates an annular oil reservoir 103 around the shaft hole 101 of the crankcase 100. 3. It has the function of collecting refrigeration oil, ensuring that the shaft system is always in a state of refrigeration oil cooling and lubrication. The oil reservoir 103 is designed with an oil discharge port 1033 on the outside, thereby ensuring that the refrigeration oil is in a state of circulation and timely removing foreign objects or impurities in the oil reservoir 103 with the flow of refrigeration oil, avoiding shaft wear or jamming. In addition, three oil leakage holes 104 are designed on the outside of the oil reservoir 103, allowing more refrigeration oil to quickly leak to the bottom of the compressor housing 300, ensuring the circulation pump oil volume. Furthermore, the design of the oil leakage holes 104 and the oil reservoir 103 can reduce the weight of the crankcase, realizing the lightweight design of the crankcase 100.

[0049] like Figure 4 As shown, a compressor 1000 according to an embodiment of the present invention includes a crankcase 100 as described in any of the preceding embodiments.

[0050] refer to Figure 4 The compressor 1000 also includes a crankshaft 200, a compressor housing 300, a cylinder 400, a muffler 500, etc. The crankshaft 200 is mounted on the shaft hole 101 of the crankcase 100, and the bottom of the crankshaft 200 is supported in the oil reservoir 103 by a retainer 210. Other components of the compressor 1000 in this embodiment, such as the crankshaft 200, compressor housing 300, cylinder 400, muffler 500, and vibration damping and support system, as well as their operation, are known to those skilled in the art and will not be described in detail here. The compressor 1000 can be, but is not limited to, a reciprocating compressor.

[0051] According to the present invention, the compressor 1000, by adopting the crankcase 100 of the compressor 100, can enhance the cooling and lubrication effect on the crankshaft 200, prevent abnormal wear or jamming of the crankshaft 200, ensure that the compressor 1000 can operate stably for a long time, improve the working reliability of the compressor 1000, and reduce the material cost of the compressor 1000.

[0052] A household appliance according to an embodiment of the present invention includes a compressor 1000 as described in the preceding embodiment. The household appliance of this embodiment can refer to a device equipped with a compressor, such as, but not limited to, a refrigerator, an air conditioner, etc.

[0053] According to the embodiments of the present invention, the use of compressor 1000 in the household appliance can reduce manufacturing costs and improve the operational reliability of the household appliance.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A crankcase for mounting a compressor crankshaft, characterized in that, include: A crankshaft housing has a shaft hole for mounting the crankshaft and a boss circumferentially arranged around the edge of the shaft hole. The crankshaft housing also has an oil reservoir and a plurality of oil drain holes. The oil reservoir is circumferentially arranged around the boss, and the plurality of oil drain holes are located on the outside of the oil reservoir. An oil discharge port is formed between at least a portion of the oil reservoir and the plurality of oil drain holes.

2. The crankcase according to claim 1, characterized in that, The crankcase also includes a cylinder block, which is connected to the crankshaft seat. The cylinder block has a cylinder bore, and the axial directions of the cylinder bore and the shaft bore are perpendicular to each other. One of the plurality of oil leakage holes is located between the cylinder bore and the shaft bore, and forms the oil discharge port between the cylinder bore and the oil reservoir.

3. The crankcase according to claim 2, characterized in that, The crankshaft seat is provided with two reinforcing ribs, which are located on opposite sides of the shaft hole and the cylinder body. The reinforcing ribs extend along the outer edge of the crankshaft seat and connect to the cylinder body. An clearance opening is formed between the ends of the two reinforcing ribs away from the cylinder body. The crankshaft seat is provided with a fan-shaped area corresponding to the clearance opening, and a plurality of oil leakage holes are located outside the fan-shaped area.

4. The crankcase according to claim 3, characterized in that, At least one of the plurality of oil leakage holes is located between the reinforcing rib and the oil storage tank.

5. The crankcase according to claim 3, characterized in that, The outer surface of the reinforcing rib is flush with or adjacent to the outer surface of the crankshaft seat. The oil leakage hole has an outer hole wall away from the shaft hole. The outer hole wall is flush with or adjacent to the inner surface of the adjacent reinforcing rib. In the radial direction of the shaft hole, the width of the oil leakage hole is less than or equal to the width of the oil reservoir.

6. The crankcase according to any one of claims 1 to 5, characterized in that, The oil leakage hole is an arc-shaped hole concentric with the shaft hole, and the central angle of the oil leakage hole is 30 degrees to 60 degrees.

7. The crankcase according to claim 1, characterized in that, The depth of the oil storage tank is 0.5 mm to 5 mm.

8. The crankcase according to claim 1, characterized in that, The inner annular groove surface of the oil storage tank is flush with the outer peripheral surface of the boss; or, the inner annular groove surface of the oil storage tank is chamfered or rounded to the boss.

9. A compressor, characterized in that, Includes the crankcase as described in any one of claims 1 to 8.

10. A household appliance, characterized in that, Includes the compressor as described in claim 9.

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