compressor

Abstract

The present invention provides a compressor, including a cylinder, a flange, a crankshaft and an oil container, the flange is installed on the cylinder, a compression chamber is formed on the cylinder, an axial hole is formed on the flange, the crankshaft passes through the compression chamber and the axial hole, an oil discharge port is constructed on the crankshaft, an oil passage is constructed on the flange, the oil container has an oil inlet and an oil outlet, an air intake channel is constructed on the cylinder, the oil container is installed in the air intake channel, the oil inlet and the oil outlet are both connected to the outside of the cylinder, the lubricating oil discharged from the oil discharge port can enter the oil inlet through the oil passage, and the lubricating oil flowing through the oil container can undergo heat exchange with the refrigerant flowing through the air intake channel. According to the present invention, since the lubricating oil is pumped to the top of the motor by the crankshaft to cool the motor and then returns to the bottom oil pool during the circulation process, the low-temperature refrigerant cools the lubricating oil with a higher temperature by heat exchange, thereby reducing the temperature of the lubricating oil, thereby achieving effective cooling of the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor design, and in particular relates to a compressor. Background Art

[0002] During compressor operation, the motor and pump generate the most heat. The motor has strict operating temperature requirements; exceeding these limits can damage the enameled wire and plastic components, leading to motor failure. Lubricating oil in the compressor reduces friction among moving parts, seals the pump body, and cools the motor and pump body. Under normal circumstances, after cooling the motor, the lubricating oil returns to the oil sump at the bottom of the casing. It is then pumped by the crankshaft to the top of the motor, where it continues to cool the motor, forming a cycle. However, the lack of a cooling mechanism for the refrigerant oil in this process results in high refrigerant oil temperatures, making the cooling effect on the motor and pump body ineffective. Summary of the Invention

[0003] Therefore, the present invention provides a compressor that can solve the technical problem that the lubricating oil in the compressor returns to the oil pool at the bottom of the shell after cooling the motor, and then continues to be pumped to the top of the motor by the crankshaft to cool the motor again to form a cycle. However, due to the lack of a link in the middle to cool the refrigeration oil, the refrigeration oil temperature is high and the cooling effect on the motor is not obvious.

[0004] In order to solve the above problems, the present invention provides a compressor, including a cylinder, a flange, a crankshaft and an oil container, the flange is installed on the cylinder, a compression chamber is formed on the cylinder, an axial hole is formed on the flange, the crankshaft passes through the compression chamber and the axial hole, an oil drain is constructed on the crankshaft, an oil passage is constructed on the flange, the oil container has an oil inlet and an oil outlet, an intake channel is constructed on the cylinder, the oil container is installed in the intake channel, the oil inlet and the oil outlet are both connected to the outside of the cylinder, the lubricating oil discharged from the oil drain can enter the oil inlet through the oil passage, and the lubricating oil flowing through the oil container can undergo heat exchange with the refrigerant flowing through the intake channel.

[0005] In some embodiments, the intake channel includes a main channel constructed on the cylinder, the main channel is connected to the compression chamber, and the main channel is also connected to the gas-liquid separator through a main intake pipe. The cylinder is also constructed with a first inlet and a first outlet connected to the main channel. The oil container is installed in the main channel, the oil inlet corresponds to the first inlet, and the oil outlet corresponds to the first outlet.

[0006] In some embodiments, the oil passage includes a first oil guide hole constructed in the flange and an oil guide groove constructed on the cylinder, the oil guide groove is located on the end surface of the flange facing the cylinder, the first inlet is constructed on the end surface of the cylinder facing the flange, the end surface of the cylinder facing the flange covers the oil guide groove, the oil guide groove is connected to the oil inlet, and the oil outlet is connected to the oil guide groove through the first oil guide hole.

[0007] In some embodiments, an exhaust port is configured on the cylinder, and the exhaust port is adjacent to the oil guide groove; and / or a sliding vane groove is configured on the cylinder, and the oil guide groove passes through the sliding vane groove.

[0008] In some embodiments, the intake channel includes a main channel constructed on the cylinder and a secondary channel constructed on the cylinder, the main channel and the secondary channel are both connected to the compression chamber, the main channel is also connected to the gas-liquid separator through a main intake pipe, and the secondary channel is also connected to the gas-liquid separator through a secondary intake pipe. The cylinder is also constructed with a second inlet and a second outlet connected to the secondary channel, the oil container is installed in the secondary channel, the oil inlet corresponds to the second inlet, and the oil outlet corresponds to the second outlet.

[0009] In some embodiments, the cylinder has a raised portion on the side facing the flange, the secondary channel is constructed in the raised portion, the second inlet and the second outlet are both constructed on the raised portion, an avoidance notch is formed on the flange, and the raised portion is located in the avoidance notch; and / or, the secondary channel is connected to the compression chamber through the main channel.

[0010] In some embodiments, the oil passage includes a second oil guide hole constructed on the hole wall of the shaft hole, one end of the second oil guide hole is connected to the oil drain port, the other end of the second oil guide hole is connected to an oil pipe, and the end of the oil pipe away from the second oil guide hole is connected to the oil inlet.

[0011] In some embodiments, a control valve is provided on the oil passage, and the control valve can control whether the oil passage is conductive and the size of the conductive area according to temperature changes in the compressor.

[0012] In some embodiments, the oil pipe includes a first pipe section and a second pipe section, the control valve includes a shell and a valve core, the shell has an accommodating channel, the shell is constructed with a first interface and a second interface connected to the accommodating channel, the valve core is constructed with a connecting channel running through the valve core, one end of the first pipe section is connected to the second oil guide hole, the other end of the first pipe section is connected to the first interface, one end of the second pipe section is connected to the second interface, and the other end of the second pipe section is connected to the oil inlet; the valve core is arranged in the accommodating channel, the valve core has a conducting state and a cut-off state, in the conducting state, the two ends of the connecting channel are connected to the first interface and the second interface respectively, in the cut-off state, the connecting channel is not connected to the first interface and the second interface, and the valve core can switch between the conducting state and the cut-off state according to the temperature change in the compressor.

[0013] In some embodiments, the shell includes an end wall and a peripheral side wall on the end wall, the end wall and the peripheral side wall enclose the accommodating channel, the valve core is slidingly sealed with the accommodating channel, there is a distance between the end of the valve core facing the end wall and the end wall, and the space between the end of the valve core facing the end wall and the end wall is filled with gas.

[0014] In some embodiments, the intake channel has at least a partial section extending along the circumference of the cylinder; and / or, a groove surrounding the axial hole is constructed on the wall of the axial hole, and the oil drain port is connected to the oil passage through the groove.

[0015] In some embodiments, a flow direction of the lubricating oil when flowing through the oil transfer container is opposite to a flow direction of the refrigerant when flowing through the air intake passage.

[0016] The compressor provided by the present invention has the following beneficial effects:

[0017] An oil drain port is constructed on the crankshaft, an oil flow channel is constructed on the flange, and an oil container is installed in the cylinder's intake channel. Both the oil inlet and oil outlet of the oil container are connected to the outside of the cylinder. When the lubricating oil used to cool the motor is discharged through the crankshaft's drain port and enters the oil inlet through the oil flow channel, the lubricating oil flows within the oil container and is discharged through the oil outlet. As the lubricating oil flows through the oil container, it exchanges heat with the low-temperature refrigerant flowing through the intake channel across the oil container, thereby cooling the lubricating oil. The cooled lubricating oil is then discharged through the oil outlet into the oil pool at the bottom of the compressor. In other words, during the circulation process, the lubricating oil is pumped by the crankshaft to the top of the motor to cool it, and then returns to the oil pool at the bottom. The low-temperature refrigerant cools the higher-temperature lubricating oil through heat exchange, thereby lowering the temperature of the lubricating oil, effectively cooling the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0019] Figure 1 is a side perspective view of a compressor according to embodiment 1 of the present invention;

[0020] Figure 2 This is a perspective view of the flange of the compressor according to the first embodiment of the present invention in a first visual sense;

[0021] Figure 3 A perspective view of the flange of the compressor according to the first embodiment of the present invention under a second visual perspective;

[0022] Figure 4 A perspective view of a cylinder of a compressor according to a first embodiment of the present invention;

[0023] Figure 5 A perspective view of a cylinder of a compressor according to a first embodiment of the present invention under a second visual perspective;

[0024] Figure 6 This is a schematic structural diagram of an oil container for a compressor according to an embodiment of the present invention;

[0025] Figure 7 is a top perspective view of a compressor according to a first embodiment of the present invention;

[0026] Figure 8 is a side perspective view of a compressor according to a second embodiment of the present invention;

[0027] Figure 9 A perspective view of a cylinder of a compressor according to a second embodiment of the present invention;

[0028] Figure 10 A perspective view of a flange of a compressor according to a second embodiment of the present invention;

[0029] Figure 11 A perspective view of a control valve of a compressor according to a second embodiment of the present invention;

[0030] Figure 12 This is a perspective view of a compressor according to a second embodiment of the present invention when the control valve is not in communication with the first pipe section and the second pipe section;

[0031] Figure 13 This is a perspective view of a compressor control valve in accordance with a second embodiment of the present invention when in communication with a first pipe section and a second pipe section.

[0032] The reference numerals indicate:

[0033] 1. Cylinder; 2. Flange; 3. Crankshaft; 4. Oil container; 5. Compression chamber; 6. Shaft hole; 7. Oil drain port; 8. Oil inlet; 9. Oil outlet; 10. Main channel; 11. Main suction pipe; 12. Gas-liquid separator; 13. First inlet; 14. First outlet; 15. First oil guide hole; 16. Oil guide groove; 17. Secondary channel; 18. Secondary suction pipe; 19. Second inlet; 20. Second outlet; 21. Raised portion; 22. Avoidance gap; 23. Second oil guide hole; 24. Oil pipe; 241. First pipe section; 242. Second pipe section; 25. Control valve; 251. Housing; 252. Valve core; 26. Groove; 27. Motor; 28. Jack; 29. ​​Exhaust port; 30. Vane groove. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying 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 embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] See also Figures 1 to 13 As shown, according to an embodiment of the present invention, a compressor is provided, including a cylinder 1, a flange 2, a crankshaft 3 and an oil container 4, the flange 2 is installed on the cylinder 1, a compression chamber 5 is formed on the cylinder 1, an axial hole 6 is formed on the flange 2, the crankshaft 3 passes through the compression chamber 5 and the axial hole 6, an oil discharge port 7 is constructed on the crankshaft 3, an oil passage is constructed on the flange 2, the oil container 4 has an oil inlet 8 and an oil outlet 9, an air suction channel is constructed on the cylinder 1, the oil container 4 is installed in the air suction channel, the oil inlet 8 and the oil outlet 9 are both connected to the outside of the cylinder 1, the lubricating oil discharged from the oil discharge port 7 can enter the oil inlet 8 through the oil passage, and the lubricating oil flowing through the oil container 4 can undergo heat exchange with the refrigerant flowing through the air suction channel.

[0039] In this technical solution, an oil drain port 7 is constructed on the crankshaft 3, an oil passage is constructed on the flange 2, and an oil reservoir 4 is installed in the intake passage of the cylinder 1. Both the oil inlet 8 and the oil outlet 9 of the oil reservoir 4 are connected to the exterior of the cylinder 1. After the lubricating oil used to cool the motor is discharged through the oil drain port 7 on the crankshaft 3 and enters the oil inlet 8 through the oil passage, the lubricating oil flows through the oil reservoir 4 and is discharged through the oil outlet 9. As the lubricating oil flows through the oil reservoir 4, it exchanges heat with the low-temperature refrigerant flowing through the intake passage, thereby cooling the lubricating oil. The cooled lubricating oil is then discharged through the oil outlet 9 into the oil sump at the bottom of the compressor. In other words, the lubricating oil is then pumped by the crankshaft 3 to the top of the motor 27 to cool it, and then returns to the oil sump at the bottom. During this circulation process, the low-temperature refrigerant cools the higher-temperature lubricating oil through heat exchange, thereby lowering the temperature of the lubricating oil and effectively cooling the motor 27. The oil container 4 can be made of a material with good thermal conductivity, such as a metal material.

[0040] As an embodiment 1, refer to Figures 1 to 7 As shown, the intake channel includes a main channel 10 constructed on the cylinder 1, the main channel 10 is connected to the compression chamber 5, and the main channel 10 is also connected to the gas-liquid separator 12 through the main intake pipe 11. The cylinder 1 is also constructed with a first inlet 13 and a first outlet 14 connected to the main channel 10. The oil container 4 is installed in the main channel 10, the oil inlet 8 corresponds to the first inlet 13, and the oil outlet 9 corresponds to the first outlet 14.

[0041] In this embodiment, since the amount of refrigerant sucked into the main channel 10 is large, when the oil container 4 is installed in the main channel 10, the lubricating oil flowing through the oil container 4 can more fully exchange heat with the refrigerant flowing through the main channel 10, thereby achieving a better cooling effect on the lubricating oil, and further achieving a better cooling effect of the lubricating oil on the motor 27. The first inlet 13 is a reserved mounting hole for the oil inlet 8. The oil inlet 8 corresponds to the first inlet 13, and the oil inlet 8 can be directly connected to the first inlet 13, or the oil inlet 8 can pass through the first inlet 13 to communicate with the outside. The first outlet 14 is a reserved mounting hole for the oil outlet 9. The oil outlet 9 corresponds to the first outlet 14, and the oil outlet 9 can be directly connected to the first outlet 14, or the oil outlet 9 can pass through the first outlet 14 to communicate with the outside.

[0042] See also Figures 2 to 7 As shown, the oil passage includes a first oil guide hole 15 constructed in the flange 2 and an oil guide groove 16 constructed on the cylinder 1. The oil guide groove 16 is located on the end surface of the flange 2 facing the cylinder 1. The first inlet 13 is constructed on the end surface of the cylinder 1 facing the flange 2. The end surface of the cylinder 1 facing the flange 2 covers the oil guide groove 16. The oil guide groove 16 is connected to the oil inlet 8, and the oil outlet 7 is connected to the oil guide groove 16 through the first oil guide hole 15.

[0043] In this technical solution, lubricating oil discharged from the oil outlet 7 of the crankshaft 3 flows sequentially through the first oil guide hole 15, the oil guide groove 16, and the oil inlet 8 into the oil container 4. It then flows through the oil outlet 9 of the oil container 4 into the oil sump at the bottom. Because the oil guide groove 16 is located on the end surface of the flange 2 facing the cylinder 1, the lubricating oil contacts the end surface of the cylinder 1 facing the flange 2 as it flows through the oil guide groove 16, thereby cooling the cylinder 1. Furthermore, the end surface of the cylinder 1 facing the flange 2 covers the oil guide groove 16, ensuring that as much of the lubricating oil as possible flows into the oil container 4.

[0044] See also Figure 7 As shown, an exhaust port 29 is formed on the cylinder 1 , and the exhaust port 29 is adjacent to the oil guide groove 16 .

[0045] In this embodiment, since the exhaust port 29 discharges high-pressure refrigerant, the area surrounding the exhaust port 29 is a high-temperature area on the cylinder 1. When the exhaust port 29 is adjacent to the oil guide groove 16, the lubricating oil flowing through the oil guide groove 16 can be used to specifically cool the high-temperature area on the cylinder 1. It should be noted that the flange 2 primarily refers to the upper flange of the pump body. An exhaust valve plate is provided on the flange 2 at the location corresponding to the exhaust port 29 of the cylinder 1. When constructing the first oil guide hole 15 and the oil guide groove 16 on the flange 2, the area where the exhaust valve plate is located should be avoided. The first oil guide hole 15 extends radially along the flange 2, and the oil guide groove 16 extends circumferentially along the flange 2.

[0046] See also Figure 7 As shown, a sliding vane groove 30 is constructed on the cylinder 1 , and the oil guide groove 16 is connected to the oil inlet 8 of the oil container 4 after passing through the sliding vane groove 30 .

[0047] In this technical solution, because the oil guide groove 16 passes through the vane groove 30, the lubricating oil flowing through the oil guide groove 16 will also enter the vane groove 30 in an appropriate amount through the small gap between the vane and the vane groove 30, thereby also being able to lubricate and cool the vane.

[0048] As Example 2, see Figures 8 to 13 As shown, the intake channel includes a main channel 10 constructed on the cylinder 1 and a secondary channel 17 constructed on the cylinder 1. The main channel 10 and the secondary channel 17 are both connected to the compression chamber 5. The main channel 10 is also connected to the gas-liquid separator 12 through the main intake pipe 11, and the secondary channel 17 is also connected to the gas-liquid separator 12 through the secondary intake pipe 18. The cylinder 1 is also constructed with a second inlet 19 and a second outlet 20 connected to the secondary channel 17. The oil container 4 is installed in the secondary channel 17, the oil inlet 8 corresponds to the second inlet 19, and the oil outlet 9 corresponds to the second outlet 20.

[0049] In this embodiment, when the cylinder 1 inhales, a large amount of refrigerant enters the compression chamber 5 through the main channel 10, while a small amount enters the compression chamber 5 through the secondary channel 17. Therefore, when the oil transfer container 4 is installed in the secondary channel 17, the lubricating oil can be cooled without substantially affecting the intake of the cylinder 1, though the cooling effect on the lubricating oil is slightly less. In contrast, in the first embodiment, the oil transfer container 4 is installed in the main channel 10. Although this has a better cooling effect on the lubricating oil, it creates a greater intake resistance, thereby affecting the intake of the cylinder 1. In other words, the first embodiment has advantages and disadvantages compared to the second embodiment. Preferably, the secondary channel 17 is connected to the compression chamber 5 through the main channel 10. In this way, only one opening is required on the inner circumferential surface of the cylinder 1 to allow the refrigerant flowing through the secondary channel 17 and the main channel 10 to be drawn into the compression chamber 5. The raised portion 21 is also provided with a socket 28 connected to the secondary channel 17. The secondary intake pipe 18 passes through the socket 28 and is connected to the secondary channel 17.

[0050] It should be noted that the second inlet 19 is a reserved mounting hole for the oil inlet 8. The oil inlet 8 and the second inlet 19 can either be directly connected, or the oil inlet 8 can pass through the second inlet 19 to communicate with the outside. The second outlet 20 is a reserved mounting hole for the oil outlet 9. The oil outlet 9 and the second outlet 20 can either be directly connected, or the oil outlet 9 can pass through the second outlet 20 to communicate with the outside. Of course, the second outlet 20 can also be connected to the first outlet 14, and the oil outlet 9 can ultimately discharge the cooled lubricating oil into the bottom oil sump through the first outlet 14.

[0051] See also Figure 9 and Figure 10 As shown, the cylinder 1 has a protrusion 21 on the side facing the flange 2, the secondary channel 17 is constructed in the protrusion 21, the second inlet 19 and the second outlet 20 are both constructed on the protrusion 21, and an avoidance notch 22 is formed on the flange 2, and the protrusion 21 is located in the avoidance notch 22.

[0052] In this technical solution, a raised portion 21 is provided on the cylinder 1, thereby facilitating the construction of the secondary channel 17 on the cylinder 1. When the raised portion 21 is located on the side of the cylinder 1 facing the flange 2, the lubricating oil discharged from the oil drain port 7 can be easily transferred into the oil container 4 through the oil passage on the flange 2. At the same time, an escape notch 22 should also be formed on the flange 2 to avoid the raised portion 21.

[0053] See also Figure 8 As shown, the oil passage includes a second oil guide hole 23 constructed on the hole wall of the shaft hole 6, one end of the second oil guide hole 23 is connected to the oil discharge port 7, the other end of the second oil guide hole 23 is connected to the oil pipe 24, and the end of the oil pipe 24 away from the second oil guide hole 23 is connected to the oil inlet 8.

[0054] In this embodiment, the provision of the raised portion 21 raises a portion of the cylinder 1 relative to the flange 2. This makes it unsuitable for direct communication with the oil container 4 through the oil passage of the flange 2. Therefore, an oil passage 24 is provided to connect the second oil guide hole 23 with the oil container 4. It will be appreciated that the raised portion 21 raises the position of the portion of the cylinder 1, thereby correspondingly raising the oil outlet 7 and the second oil guide hole 23.

[0055] See also Figure 8 、 Figures 11 to 13 As shown, a control valve 25 is provided on the oil pipe 24. The control valve 25 can control whether the oil pipe 24 is conductive and the size of the conductive area according to the temperature change in the compressor.

[0056] In this technical solution, a control valve 25 is provided on oil pipe 24 to open it when the compressor's internal temperature is high, allowing the low-temperature refrigerant during intake to cool the higher-temperature lubricating oil. Furthermore, the higher the temperature, the larger the area of ​​oil pipe 24 opened by control valve 25, resulting in more lubricating oil being cooled per unit time. Meanwhile, when the compressor's internal temperature is low, indicating that motor 27 is not hot, cooling the lubricating oil is unnecessary to prevent cooling of motor 27. Therefore, control valve 25 closes oil pipe 24, thereby increasing the device's applicability.

[0057] See also Figures 11 to 13 As shown, the oil passage 24 comprises a first section 241 and a second section 242. The control valve 25 comprises a housing 251 and a valve core 252. The housing 251 has a receiving passage and is provided with a first port and a second port communicating with the receiving passage. The valve core 252 has a communication passage extending through the valve core 252. One end of the first section 241 communicates with the second oil guide hole 23, and the other end of the first section 241 communicates with the first port. One end of the second section 242 communicates with the second port, and the other end of the second section 242 communicates with the oil inlet 8. The valve core 252 is disposed within the receiving passage and has an on-state and a off-state. In the on-state, the ends of the communication passage communicate with the first port and the second port, respectively. In the off-state, the communication passage is disconnected from the first port and the second port. The valve core 252 can switch between the on-state and the off-state depending on temperature changes within the compressor.

[0058] In this embodiment, when the temperature within the compressor is high and the motor 27 needs to be effectively cooled, the valve core 252 is in the conducting state, so that the communication channel of the valve core 252 connects the first pipe section 241 and the second pipe section 242. The lubricating oil discharged from the oil discharge port 7 flows sequentially through the second oil guide hole 23, the first pipe section 241, the communication channel, and the second pipe section 242 into the oil transfer container 4, thereby allowing the low-temperature refrigerant during the intake air flow to cool the higher-temperature lubricating oil. When the temperature within the compressor is low, to prevent the motor 27 from being cooled, the valve core 252 is in the blocking state, so that the communication channel of the valve core 252 is not connected to the first pipe section 241 and the second pipe section 242. The lubricating oil does not enter the oil transfer container 4, and the low-temperature refrigerant during the intake air flow does not cool the lubricating oil.

[0059] See also Figure 11 As shown, the shell 251 includes an end wall and a peripheral side wall on the end wall. The end wall and the peripheral side wall enclose a receiving channel. The valve core 252 is slidingly sealed with the receiving channel. There is a distance between the end of the valve core 252 facing the end wall and the end wall, and the space between the end of the valve core 252 facing the end wall and the end wall is filled with gas.

[0060] In this technical solution, because the end of the valve core 252 facing the end wall is filled with gas and the space between the end wall, and this gas is in a sealed state, as the temperature in the compressor increases, the gas expands, causing the valve core 252 to slide along the accommodating channel under the action of the air pressure difference. As the valve core 252 slides along the accommodating channel, the valve core 252 gradually switches from a cut-off state to a conducting state. As the temperature rises, the area of ​​communication between the communication channel on the valve core 252 and the first pipe section 241 and the second pipe section 242 increases. When the temperature in the compressor decreases, the gas contracts, causing the valve core 252 to slide back along the accommodating channel under the action of the air pressure difference. The valve core 252 gradually switches from a conducting state to a cut-off state, thereby enabling the control valve 25 to control whether the oil passage 24 is conducting and the size of the conducting area according to the temperature changes in the compressor. It should be noted that, when the compressor is used in an air conditioner, it is connected to the air conditioning system. Therefore, when the temperature inside the compressor increases or decreases, the pressure inside the compressor does not change significantly. However, the gas sealed between the valve core 252 and the end wall is significantly affected by thermal expansion and contraction. Therefore, the valve core 252 can slide back and forth along the housing 251 under the action of a pressure differential to open and close the control valve 25. The gas filled between the end of the valve core 252 facing the end wall and the end wall can be refrigerant, air, nitrogen, etc. It should also be noted that a stop structure can be provided within the housing 251 to limit the sliding movement of the valve core 252 and prevent it from slipping out of the housing 251 due to gas expansion. When the valve core 252 is restrained by the stop structure, the communication channel of the valve core 252 is fully aligned with the first pipe section 241 and the second pipe section 242, maximizing the conductive area. Preferably, the opening of the housing 251 faces downward.

[0061] See also Figure 4 and Figure 9 As shown, the intake passage extends at least partially in the circumferential direction of the cylinder 1 .

[0062] In the prior art, the intake channel usually extends radially along the cylinder 1, so the intake channel is relatively short. After the intake pipe is inserted into the intake channel, there is not much space left in the intake channel to expand the cross-sectional area to reduce the intake resistance. However, the present application designs the intake channel to have at least a partial section extending along the circumference of the cylinder 1, so that the intake channel can be longer. After the intake pipe is inserted into the intake channel, there is still more space left in the intake channel to expand the cross-sectional area, thereby reducing the intake resistance. It can be understood that when the intake channel only includes the main channel 10, the main channel 10 has at least a partial section extending along the circumference of the cylinder 1; when the intake channel includes both the main channel 10 and the secondary channel 17, both the main channel 10 and the secondary channel 17 have at least a partial section extending along the circumference of the cylinder 1.

[0063] See also Figure 3 and Figure 10 As shown, a groove 26 surrounding the shaft hole 6 is formed on the hole wall of the shaft hole 6 , and the oil discharge port 7 is connected to the oil passage through the groove 26 .

[0064] In this embodiment, since the crankshaft 3 rotates during compressor operation, a groove 26 is formed on the wall of the shaft hole 6, circumferentially surrounding the shaft hole 6, and the position of the groove 26 corresponds to the position of the oil drain port 7. This ensures that the oil drain port 7 is always connected to the oil passageway, even when the crankshaft 3 rotates. It will be appreciated that when the oil passageway includes the first oil guide hole 15 and the oil guide groove 16, the oil drain port 7 communicates with the first oil guide hole 15 via the groove 26; when the oil passageway includes the second oil guide hole 23, the oil drain port 7 communicates with the second oil guide hole 23 via the groove 26.

[0065] As a specific embodiment, the flow direction of the lubricating oil when flowing through the oil container 4 is opposite to the flow direction of the refrigerant when flowing through the intake channel, so that the lubricating oil and the refrigerant can perform countercurrent heat exchange, thereby improving the heat exchange efficiency.

[0066] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A compressor, characterized in that: The invention comprises a cylinder (1), a flange (2), a crankshaft (3) and an oil container (4), wherein the flange (2) is mounted on the cylinder (1), a compression chamber (5) is formed on the cylinder (1), an axial hole (6) is formed on the flange (2), the crankshaft (3) passes through the compression chamber (5) and the axial hole (6), an oil discharge port (7) is constructed on the crankshaft (3), an oil passage is constructed on the flange (2), the oil container (4) has an oil inlet (8) and an oil outlet (9), an air intake passage is constructed on the cylinder (1), the oil container (4) is mounted in the air intake passage, the oil inlet (8) and the oil outlet (9) are both connected to the outside of the cylinder (1), the lubricating oil discharged from the oil discharge port (7) can enter the oil inlet (8) through the oil passage, and the lubricating oil flowing through the oil container (4) can exchange heat with the refrigerant flowing through the air intake passage.

2. The compressor according to claim 1, characterized in that The air intake channel comprises a main channel (10) constructed on the cylinder (1), the main channel (10) being in communication with the compression chamber (5), and the main channel (10) being in communication with a gas-liquid separator (12) via a main air intake pipe (11). The cylinder (1) is also provided with a first inlet (13) and a first outlet (14) in communication with the main channel (10), the oil container (4) being installed in the main channel (10), the oil inlet (8) corresponding to the first inlet (13), and the oil outlet (9) corresponding to the first outlet (14).

3. The compressor according to claim 2, characterized in that The oil passage comprises a first oil guide hole (15) constructed in the flange (2) and an oil guide groove (16) constructed on the cylinder (1); the oil guide groove (16) is located on the end surface of the flange (2) facing the cylinder (1); the first inlet (13) is constructed on the end surface of the cylinder (1) facing the flange (2); the end surface of the cylinder (1) facing the flange (2) covers the oil guide groove (16); the oil guide groove (16) is communicated with the oil inlet (8); and the oil outlet (7) is communicated with the oil guide groove (16) through the first oil guide hole (15).

4. The compressor according to claim 3, characterized in that The cylinder (1) is provided with an exhaust port (29), and the exhaust port (29) is adjacent to the oil guide groove (16); and / or the cylinder (1) is provided with a slide groove (30), and the oil guide groove (16) passes through the slide groove (30).

5. The compressor according to claim 1, characterized in that The air intake channel comprises a main channel (10) constructed on the cylinder (1) and a secondary channel (17) constructed on the cylinder (1). Both the main channel (10) and the secondary channel (17) are in communication with the compression chamber (5). The main channel (10) is also in communication with the gas-liquid separator (12) via a main air intake pipe (11). The secondary channel (17) is also in communication with the gas-liquid separator (12) via a secondary air intake pipe (18). The cylinder (1) is also provided with a second inlet (19) and a second outlet (20) in communication with the secondary channel (17). The oil container (4) is installed in the secondary channel (17). The oil inlet (8) corresponds to the second inlet (19), and the oil outlet (9) corresponds to the second outlet (20).

6. The compressor according to claim 5, characterized in that The cylinder (1) has a protrusion (21) on a side facing the flange (2), the secondary channel (17) is constructed in the protrusion (21), the second inlet (19) and the second outlet (20) are both constructed on the protrusion (21), an avoidance notch (22) is formed on the flange (2), and the protrusion (21) is located in the avoidance notch (22); and / or the secondary channel (17) is connected to the compression chamber (5) through the main channel (10).

7. The compressor according to claim 5, characterized in that The oil passage comprises a second oil guide hole (23) constructed on the hole wall of the shaft hole (6), one end of the second oil guide hole (23) is connected to the oil discharge port (7), the other end of the second oil guide hole (23) is connected to an oil pipe (24), and the end of the oil pipe (24) away from the second oil guide hole (23) is connected to the oil inlet (8).

8. The compressor according to claim 7, characterized in that The oil passage pipe (24) is provided with a control valve (25), and the control valve (25) can control whether the oil passage pipe (24) is conductive and the size of the conductive area according to the temperature change in the compressor.

9. The compressor according to claim 8, characterized in that The oil pipe (24) includes a first pipe section (241) and a second pipe section (242); the control valve (25) includes a housing (251) and a valve core (252); the housing (251) has an accommodating channel; the housing (251) is provided with a first interface and a second interface communicating with the accommodating channel; the valve core (252) is provided with a communicating channel penetrating the valve core (252); one end of the first pipe section (241) is communicated with the second oil guide hole (23); the other end of the first pipe section (241) is communicated with the first interface; the second One end of the pipe section (242) is connected to the second interface, and the other end of the second pipe section (242) is connected to the oil inlet (8); the valve core (252) is arranged in the accommodating channel, and the valve core (252) has a conducting state and a cut-off state. In the conducting state, the two ends of the communication channel are respectively connected to the first interface and the second interface, and in the cut-off state, the communication channel is not connected to the first interface and the second interface. The valve core (252) can switch between the conducting state and the cut-off state according to the temperature change in the compressor.

10. The compressor according to claim 9, characterized in that The shell (251) includes an end wall and a peripheral side wall on the end wall, the end wall and the peripheral side wall enclose the accommodating channel, the valve core (252) is in sliding sealing cooperation with the accommodating channel, there is a distance between the end of the valve core (252) facing the end wall and the end wall, and the space between the end of the valve core (252) facing the end wall and the end wall is filled with gas.

11. The compressor according to any one of claims 1 to 10, characterized in that At least a portion of the air intake passage extends along the circumference of the cylinder (1); and / or a groove (26) surrounding the axial hole (6) is formed on the wall of the axial hole (6), and the oil discharge port (7) is connected to the oil passage through the groove (26).

12. The compressor according to any one of claims 1 to 10, characterized in that The flow direction of the lubricating oil when flowing through the oil container (4) is opposite to the flow direction of the refrigerant when flowing through the air intake passage.

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