A crankshaft and compressor

Abstract

The application provides a crankshaft and a compressor, which comprise a long shaft, a first eccentric part, a second eccentric part and a short shaft arranged in sequence; the long shaft and the first eccentric part are provided with a first oil passage channel in the axial direction of the long shaft, the end of the long shaft away from the first eccentric part is provided with a first oil inlet communicating with the first oil passage channel and penetrating the side surface of the long shaft, and the first eccentric part is provided with a first oil outlet communicating with the first oil passage channel and penetrating the side surface of the first eccentric part; the second eccentric part and the short shaft are provided with a second oil passage channel in the axial direction of the short shaft, the end of the short shaft away from the second eccentric part is provided with a second oil inlet communicating with the second oil passage channel and penetrating the side surface of the short shaft, and the second eccentric part is provided with a second oil outlet; the first oil passage channel and the second oil passage channel are not communicated. The first oil passage channel and the second oil passage channel are not communicated, and two types of different refrigerants can be used for the two cylinders of the double-cylinder compressor, so that the energy efficiency and the use scene of the compressor are improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and particularly to a crankshaft and a compressor. Background Technology

[0002] To improve the energy efficiency and application scenarios of compressors, some compressors are equipped with two cylinders. Both cylinders can compress the refrigerant simultaneously, or only one cylinder can compress the refrigerant, so as to output different volumes of compressed refrigerant. A twin-cylinder compressor includes a crankshaft and an oil sump. The crankshaft has an oil passage in the axial direction. When the crankshaft rotates, it can deliver lubricating oil from the oil sump to the friction parts related to the crankshaft, so that the friction parts are lubricated.

[0003] However, because the crankshaft only has one oil passage along the axial direction, the refrigerant and lubricating oil in the two cylinders can mix. If different types of refrigerant are used in the two cylinders, the two refrigerants will mix between the two cylinders through the oil passage in the crankshaft. Therefore, current twin-cylinder compressors can only use one type of refrigerant, which limits the energy efficiency and application scenarios of twin-cylinder compressors. Summary of the Invention

[0004] This invention provides a crankshaft and a compressor to solve the technical problem that a twin-cylinder compressor can only use one type of refrigerant.

[0005] To solve the above-mentioned technical problems, the present invention provides a crankshaft, comprising a long shaft, a first eccentric portion, a second eccentric portion, and a short shaft arranged sequentially;

[0006] The long shaft and the first eccentric portion are provided with a first oil passage along the axial direction of the long shaft. The end of the long shaft away from the first eccentric portion is provided with a first oil inlet that communicates with the first oil passage and penetrates the side of the long shaft. The first eccentric portion is provided with a first oil outlet that communicates with the first oil passage and penetrates the side of the first eccentric portion.

[0007] The second eccentric portion and the short shaft are provided with a second oil passage along the axial direction of the short shaft. The end of the short shaft away from the second eccentric portion is provided with a second oil inlet that communicates with the second oil passage and penetrates the side of the short shaft. The second eccentric portion is provided with a second oil outlet that communicates with the second oil passage and penetrates the side of the second eccentric portion. The first oil passage and the second oil passage are not connected.

[0008] Preferably, the long shaft and the first eccentric portion are an integral structure, the second eccentric portion and the short shaft are an integral structure, and the first eccentric portion and the second eccentric portion are detachably connected by a mortise and tenon structure.

[0009] Preferably, a third oil outlet is provided at the position where the long shaft and the first eccentric part are connected. The third oil outlet is connected to the first oil passage and extends through the side of the long shaft.

[0010] Preferably, a fourth oil outlet is provided on the side of the first eccentric portion away from the long shaft, and the fourth oil outlet is connected to the first oil passage and extends through the side of the crankshaft.

[0011] Preferably, a fifth oil outlet is provided at the position where the short shaft and the second eccentric part are connected. The fifth oil outlet is connected to the second oil passage and extends through the side of the short shaft.

[0012] Preferably, a sixth oil outlet is provided on the side of the second eccentric portion away from the short shaft, and the sixth oil outlet is connected to the second oil passage and extends through the side of the crankshaft.

[0013] Preferably, the axes of the first oil passage and the second oil passage are on the same straight line.

[0014] The present invention also provides a compressor, comprising a housing, an isolation intermediate plate, a first oil suction pipe, a first cylinder head, a first cylinder, a second oil suction pipe, a second cylinder head, a second cylinder, and a crankshaft as described in any one of the above.

[0015] The isolation intermediate plate divides the cavity inside the shell into a first cavity and a second cavity. A first oil tank is provided in the first cavity, and a second oil tank is provided in the second cavity.

[0016] The first oil suction pipe, the long shaft, the first cylinder head, and the first cylinder are disposed in the first chamber; one end of the first oil suction pipe is connected to the first oil inlet, and the other end is connected to the first oil sump; the long shaft passes through the first cylinder head, the first cylinder head is fixed on the end face of the first cylinder near the long shaft, and the first eccentric part is disposed in the first cylinder;

[0017] The second oil suction pipe, the short shaft, the second cylinder head, and the second cylinder are disposed in the second chamber; one end of the second oil suction pipe is connected to the second oil inlet, and the other end is connected to the second oil sump; the short shaft passes through the second cylinder head, the second cylinder head is fixed on the end face of the second cylinder near the short shaft, and the second eccentric part is disposed in the second cylinder;

[0018] The end faces of the first cylinder and the second cylinder facing the isolation intermediate plate are respectively fixedly connected to the two sides of the isolation intermediate plate, and the connection between the first eccentric part and the second eccentric part passes through the isolation intermediate plate;

[0019] The first cylinder and the second cylinder use different types of refrigerant.

[0020] Preferably, the lubricating oils in the first oil sump and the second oil sump are of different types, the lubricating oil in the first oil sump is compatible with the refrigerant used in the first cylinder, and the lubricating oil in the second oil sump is compatible with the refrigerant used in the second cylinder.

[0021] Preferably, a first air inlet, a first air outlet, a second air inlet, and a second air outlet are provided on the same side of the housing; the first air inlet is connected to the first cylinder, and the first air outlet is connected to the first chamber; the second air inlet is connected to the second cylinder, and the second air outlet is connected to the second chamber.

[0022] This invention provides a crankshaft and compressor, including a first oil passage and a second oil passage. The first and second oil passages are not connected, forming two independent lubrication channels. When this crankshaft is used in a twin-cylinder compressor, the refrigerant and lubricating oil in the two cylinders flow only in their respective oil passages. The refrigerant does not mix when passing through the first and second oil passages. Therefore, the two cylinders of the twin-cylinder compressor can use two different types of refrigerant, improving the compressor's energy efficiency and expanding its application scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a crankshaft provided in an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure after the crankshaft, which is divided into two sections, is connected.

[0025] Figure 3 This is a schematic diagram of the structure of a compressor provided in an embodiment of the present invention.

[0026] The attached figures are labeled as follows:

[0027] Crankshaft-1, housing-2, isolation intermediate plate-3, first oil suction pipe-4, first cylinder head-5, first cylinder-6, second oil suction pipe-7, second cylinder head-8, second cylinder-9, first piston-10, second piston-11, support plate-12, motor-13;

[0028] Long shaft-100, first eccentric part-101, second eccentric part-102, short shaft-103, first oil passage-111, second oil passage-112, first oil outlet-1111, second oil outlet-1112, third oil outlet-1113, fourth oil outlet-1114, fifth oil outlet-1115, sixth oil outlet-1116;

[0029] First chamber-21, second chamber-22, first oil tank-211;

[0030] First air inlet -201, first air outlet -2011, second air inlet -202, second air outlet -2022. Detailed Implementation

[0031] To make the objectives, advantages, and features of the present invention clearer, a crankshaft and compressor according to the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0032] In the description of this invention, the terms "first," "second," and other qualifiers are added for convenience of description and reference, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with qualifiers such as "first" and "second" may explicitly or implicitly include one or more of that feature.

[0033] like Figure 1 As shown, this embodiment provides a crankshaft 1, including a long shaft 100, a first eccentric portion 101, a second eccentric portion 102, and a short shaft 103 arranged sequentially. A first oil passage 111 is provided on the long shaft 100 and the first eccentric portion 101 along the axial direction of the long shaft 100. A first oil inlet is provided at the end of the long shaft 100 away from the first eccentric portion 101, communicating with the first oil passage 111 and penetrating the side of the long shaft 100. A [missing information - likely a typo, should be "…"] is provided on the first eccentric portion 101, communicating with the first oil passage 111 and penetrating the first eccentric portion 101. The first oil outlet 1111 is located on the side; the second eccentric portion 102 and the short shaft 103 are provided with a second oil passage 112 along the axial direction of the short shaft 103; the end of the short shaft 103 away from the second eccentric portion 102 is provided with a second oil inlet that communicates with the second oil passage 112 and penetrates the side of the short shaft 103; the second eccentric portion 102 is provided with a second oil outlet 1112 that communicates with the second oil passage 112 and penetrates the side of the second eccentric portion 102; the first oil passage 111 and the second oil passage 112 are not connected.

[0034] The crankshaft 1 provided in this embodiment includes a first oil passage 111 and a second oil passage 112. The first oil passage 111 and the second oil passage 112 are not connected, forming two independent lubrication channels. When the crankshaft 1 is used in a twin-cylinder compressor, the refrigerant and lubricating oil in the two cylinders flow only in their respective corresponding oil passages. The refrigerant will not mix through the first oil passage 111 and the second oil passage 112. Therefore, the two cylinders of the twin-cylinder compressor can use two different types of refrigerant to improve the compressor's energy efficiency and expand its application scenarios.

[0035] Taking R1234yf and R744 refrigerants as examples, these two refrigerants can operate according to the modes in the table below to improve the energy efficiency of the compressor and the application scenarios.

[0036] Table 1. Refrigerant operation in different compressor modes

[0037] Preferred, such as Figure 2 As shown, the long shaft 100 and the first eccentric part 101 are an integral structure, and the second eccentric part 102 and the short shaft 103 are an integral structure. The first eccentric part 101 and the second eccentric part 102 are detachably connected by a mortise and tenon structure, which facilitates the assembly of the crankshaft 1 and the piston on the crankshaft 1 in the compressor.

[0038] Preferred, such as Figure 1 As shown, a third oil outlet 1113 is provided at the position where the long shaft 100 and the first eccentric portion 101 connect. The third oil outlet 1113 communicates with the first oil passage 111 and penetrates the side of the long shaft 100. Figure 1 and Figure 3 As shown, the lubricating oil output from the third oil outlet 1113 can lubricate the friction points between the first cylinder head 5 and the first piston 10, reducing friction power consumption and the wear of components.

[0039] Preferred, such as Figure 1 As shown, a fourth oil outlet 1114 is provided on the side of the first eccentric portion 101 away from the long shaft 100. The fourth oil outlet 1114 communicates with the first oil passage 111 and penetrates the side of the crankshaft 1. Figure 1 and Figure 3 As shown, the lubricating oil output from the fourth oil outlet 1114 can lubricate the friction points between the isolation intermediate plate 3 and the first piston 10, reducing friction power consumption and the wear of components.

[0040] Preferred, such as Figure 1As shown, a fifth oil outlet 1115 is provided at the position where the short shaft 103 and the second eccentric portion 102 are connected. The fifth oil outlet 1115 communicates with the second oil passage 112 and penetrates the side of the short shaft 103. Figure 1 and Figure 3 As shown, the lubricating oil output from the fifth oil outlet 1115 can lubricate the friction points between the second cylinder head 8 and the second piston 11, reducing frictional power consumption and the wear of components.

[0041] Preferred, such as Figure 1 As shown, a sixth oil outlet 1116 is provided on the side of the second eccentric portion 102 away from the short shaft 103. The sixth oil outlet 1116 communicates with the second oil passage 112 and penetrates the side of the crankshaft 1. Figure 1 and Figure 3 As shown, the lubricating oil output from the sixth oil outlet 1116 can lubricate the friction position between the isolation intermediate plate 3 and the second piston 11, reducing friction power consumption and component wear.

[0042] Preferred, such as Figure 1 and Figure 2 As shown, the axes of the first oil passage 111 and the second oil passage 112 are on the same straight line, which facilitates the processing to form the first oil passage 111 and the second oil passage 112.

[0043] like Figure 1 and Figure 3As shown, based on the same technical concept as the crankshaft 1 described above, this embodiment provides a compressor, including a housing 2, an isolation intermediate plate 3, a first oil suction pipe 4, a first cylinder head 5, a first cylinder 6, a second oil suction pipe 7, a second cylinder head 8, a second cylinder 9, and the crankshaft 1 described above; the isolation intermediate plate 3 divides the chambers within the housing 2 into a first chamber 21 and a second chamber 22, a first oil sump 211 is provided in the first chamber 21, and a second oil sump is provided in the second chamber 22; the first oil suction pipe 4, the long shaft 100, the first cylinder head 5, and the first cylinder 6 are disposed in the first chamber 21; one end of the first oil suction pipe 4 is connected to a first oil inlet, and the other end is connected to the first oil sump 211; the long shaft 100 passes through the first cylinder head 5, and the first cylinder head 5 is fixed to the first cylinder 6 near the long shaft 1. On the end face of cylinder 6, the first eccentric portion 101 is disposed within the first cylinder 6; the second oil suction pipe 7, the short shaft 103, the second cylinder head 8, and the second cylinder 9 are disposed within the second chamber 22; one end of the second oil suction pipe 7 is connected to the second oil inlet, and the other end is connected to the second oil sump; the short shaft 103 passes through the second cylinder head 8, the second cylinder head 8 is fixed to the end face of the second cylinder 9 near the short shaft 103, and the second eccentric portion 102 is disposed within the second cylinder 9; the end faces of the first cylinder 6 and the second cylinder 9 facing the isolation intermediate plate 3 are respectively fixedly connected to the two sides of the isolation intermediate plate 3, and the connection between the first eccentric portion 101 and the second eccentric portion 102 passes through the isolation intermediate plate 3; the first cylinder 6 and the second cylinder 9 use different types of refrigerant. The compressor can be a horizontal compressor or a vertical compressor.

[0044] This embodiment provides a compressor including a first oil passage 111 and a second oil passage 112. The first oil passage 111 and the second oil passage 112 are not connected, forming two independent lubrication channels. When the crankshaft 1 is used in the dual-cylinder compressor, the refrigerant and lubricating oil in the two cylinders flow only in their respective corresponding oil passages. The refrigerant will not mix through the first oil passage 111 and the second oil passage 112. Therefore, the two cylinders of the dual-cylinder compressor can use two different types of refrigerant to improve the compressor's energy efficiency and expand its application scenarios.

[0045] Preferred, such as Figure 3As shown, the lubricating oils in the first oil sump 211 and the second oil sump are of different types. The lubricating oil in the first oil sump 211 is compatible with the refrigerant used in the first cylinder 6, while the lubricating oil in the second oil sump is compatible with the refrigerant used in the second cylinder 9. Different refrigerants and different lubricating oils have varying degrees of compatibility. For example, R744 has a high degree of compatibility with POE (Polyol Ester Oil), while R1234yf has a high degree of compatibility with PAG (Polyalkylene Glycol). During use, the lubricating oil with the best or best compatibility with the refrigerant can be selected according to its type to improve the compressor's lubrication effect.

[0046] Preferred, such as Figure 3 As shown, a first air inlet 201, a first air outlet 2011, a second air inlet 202, and a second air outlet 2022 are provided on the same side of the housing 2. The first air inlet 201 is connected to the first cylinder 6, and the first air outlet 2011 is connected to the first chamber 21. The second air inlet 202 is connected to the second cylinder 9, and the second air outlet 2022 is connected to the second chamber 22. The first air inlet 201, the first air outlet 2011, the second air inlet 202, and the second air outlet 2022 are located on the same side of the housing 2, which simplifies the structure of the compressor.

[0047] Preferred, such as Figure 1 and Figure 3 As shown, the compressor also includes a support plate 12 and a motor 13. The motor 13 is disposed between the support plate 12 and the first cylinder head 5. The support plate 12 and the motor 13 are respectively fixed to the inner wall of the first chamber 21. The long shaft 100 passes through the support plate 12 and the motor 13. The support plate 12 can support the long shaft 100, improving the stability of the long shaft 100.

[0048] In summary, the present invention provides a crankshaft 1 and a compressor, including a first oil passage 111 and a second oil passage 112. The first oil passage 111 and the second oil passage 112 are not connected, forming two independent lubrication channels. When the crankshaft 1 is used in a twin-cylinder compressor, the refrigerant and lubricating oil in the two cylinders flow only in their respective corresponding oil passages. The refrigerant will not mix through the first oil passage 111 and the second oil passage 112. Therefore, the two cylinders of the twin-cylinder compressor can use two different types of refrigerant to improve the compressor's energy efficiency and expand its application scenarios.

[0049] The above description is only a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the present invention.

Claims

1. A crankshaft, characterized in that, It includes a long axis, a first eccentric part, a second eccentric part, and a short axis arranged in sequence; The long shaft and the first eccentric portion are provided with a first oil passage along the axial direction of the long shaft. The end of the long shaft away from the first eccentric portion is provided with a first oil inlet that communicates with the first oil passage and penetrates the side of the long shaft. The first eccentric portion is provided with a first oil outlet that communicates with the first oil passage and penetrates the side of the first eccentric portion. The second eccentric portion and the short shaft are provided with a second oil passage along the axial direction of the short shaft. The end of the short shaft away from the second eccentric portion is provided with a second oil inlet that communicates with the second oil passage and penetrates the side of the short shaft. The second eccentric portion is provided with a second oil outlet that communicates with the second oil passage and penetrates the side of the second eccentric portion. The first oil passage and the second oil passage are not connected.

2. A crankshaft as described in claim 1, characterized in that, The long shaft and the first eccentric part are an integral structure, the second eccentric part and the short shaft are an integral structure, and the first eccentric part and the second eccentric part are detachably connected by a mortise and tenon structure.

3. A crankshaft as described in claim 1, characterized in that, A third oil outlet is provided at the position where the long shaft and the first eccentric part are connected. The third oil outlet is connected to the first oil passage and extends through the side of the long shaft.

4. A crankshaft as described in claim 1, characterized in that, A fourth oil outlet is provided on the side of the first eccentric portion away from the long shaft. The fourth oil outlet is connected to the first oil passage and extends through the side of the crankshaft.

5. A crankshaft as described in claim 1, characterized in that, A fifth oil outlet is provided at the position where the short shaft and the second eccentric part are connected. The fifth oil outlet is connected to the second oil passage and extends through the side of the short shaft.

6. A crankshaft as described in claim 1, characterized in that, The second eccentric portion is provided with a sixth oil outlet on the side away from the short shaft. The sixth oil outlet is connected to the second oil passage and extends through the side of the crankshaft.

7. A crankshaft as described in claim 1, characterized in that, The axes of the first oil passage and the second oil passage are on the same straight line.

8. A compressor, characterized in that, It includes a housing, an isolation intermediate plate, a first oil suction pipe, a first cylinder head, a first cylinder, a second oil suction pipe, a second cylinder head, a second cylinder, and a crankshaft as described in any one of claims 1 to 7; The isolation intermediate plate divides the cavity inside the shell into a first cavity and a second cavity. A first oil tank is provided in the first cavity, and a second oil tank is provided in the second cavity. The first oil suction pipe, the long shaft, the first cylinder head, and the first cylinder are disposed in the first chamber; one end of the first oil suction pipe is connected to the first oil inlet, and the other end is connected to the first oil sump; the long shaft passes through the first cylinder head, the first cylinder head is fixed on the end face of the first cylinder near the long shaft, and the first eccentric part is disposed in the first cylinder; The second oil suction pipe, the short shaft, the second cylinder head, and the second cylinder are disposed in the second chamber; one end of the second oil suction pipe is connected to the second oil inlet, and the other end is connected to the second oil sump; the short shaft passes through the second cylinder head, the second cylinder head is fixed on the end face of the second cylinder near the short shaft, and the second eccentric part is disposed in the second cylinder; The end faces of the first cylinder and the second cylinder facing the isolation intermediate plate are respectively fixedly connected to the two sides of the isolation intermediate plate, and the connection between the first eccentric part and the second eccentric part passes through the isolation intermediate plate; The first cylinder and the second cylinder use different types of refrigerant.

9. A compressor as described in claim 8, characterized in that, The first oil sump and the second oil sump contain different types of lubricating oil. The lubricating oil in the first oil sump is compatible with the refrigerant used in the first cylinder, and the lubricating oil in the second oil sump is compatible with the refrigerant used in the second cylinder.

10. A compressor as described in claim 8, characterized in that, The housing has a first air inlet, a first air outlet, a second air inlet, and a second air outlet on the same side; the first air inlet is connected to the first cylinder, and the first air outlet is connected to the first chamber; the second air inlet is connected to the second cylinder, and the second air outlet is connected to the second chamber.

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