Cooling structure of exhaust cover of refrigeration compressor

Abstract

The utility model discloses a refrigeration compressor exhaust cover cooling structure which comprises an outer shell, a cylinder body assembly is arranged in the outer shell, an exhaust cover is arranged on the end portion of the cylinder body assembly, an oil outlet path is arranged on the upper portion of the cylinder body assembly, the oil outlet path is communicated with an oil discharge hole, and the oil discharge hole is connected with the outer surface of the exhaust cover. The utility model provides a cooling structure of an exhaust cover of a refrigeration compressor, which can improve the utilization rate of lubricating oil, enable the lubricating oil to cool the exhaust cover and ensure the operation quality of the whole compressor, and because an oil outlet path is arranged at the upper part, the lubricating oil discharged from an oil discharge hole can move downwards due to the gravity effect, and the exhaust cover is cooled. And therefore, full contact with the exhaust cover is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a cooling structure of an exhaust cover of a refrigeration compressor. Background Art

[0002] The compressor mainly relies on the oil suction pipe at the bottom of the crankshaft to absorb oil through the centrifugal force generated by the rotation of the rotor. The lubricating oil is mainly used for the lubrication of various friction pairs, such as the lubrication of the crankcase and the crankshaft, and the lubrication of the crankshaft and the piston. The lubricating oil cannot be effectively delivered to the cylinder head, which is the component with the highest temperature in the entire compressor. Especially in the summer when working under heavy load, the suction temperature is high, the exhaust pressure is high, and the compressor startup rate is high. The exhaust valve group often has to withstand extreme high temperatures, which can easily cause problems such as reduced compressor operating efficiency, carbon deposition on the valve group, and gasket failure. Reducing the temperature of the cylinder head can effectively improve the working environment of the exhaust valve group.

[0003] For example, the publication number "CN116816681A" discloses a "compressor", including a fixed scroll, a movable scroll and an exhaust cover, the compressor has a compression chamber and a high-pressure chamber, and the compression chamber is connected to the high-pressure chamber; the compressor includes an oil distribution part, the oil distribution part has an oil distribution chamber, and the compressor includes an oil distribution pipe; the compressor includes an oil return part, the oil return part has an oil return channel, the oil distribution chamber is connected to the oil return channel, the oil distribution part includes an oil distribution inner wall, the oil distribution inner wall has an oil groove, in the axial direction of the oil distribution pipe, the oil groove extends to the oil return channel, the oil groove is connected to the oil distribution chamber, and on the projection plane perpendicular to the axial direction of the oil return channel, the oil groove and the oil return channel at least partially overlap. However, in actual applications, the setting of such a structure can only allow the lubricant to take away the heat near the cylinder and the oil circulation path when it circulates in the oil path, and during the operation of the compressor, the heat on the exhaust cover cannot be dissipated, and the cooling effect of the lubricating oil cannot be fully utilized. Summary of the invention

[0004] In view of the problem that the prior art mentioned in the background technology cannot fully utilize the cooling effect of lubricating oil, the utility model provides a cooling structure for a refrigeration compressor exhaust cover, which can improve the utilization rate of lubricating oil, so that the lubricating oil can cool the exhaust cover and ensure the operating quality of the entire compressor.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions.

[0006] A refrigeration compressor exhaust cover cooling structure includes an outer shell, a cylinder assembly is arranged in the outer shell, an exhaust cover is arranged at the end of the cylinder assembly, an oil outlet passage is arranged at the upper part of the cylinder assembly, the oil outlet passage is connected with an oil drain hole, and the oil drain hole is connected to the outer surface of the exhaust cover. In the present application, the lubricating oil in the oil outlet passage can be partially discharged from the oil drain hole by connecting the oil outlet passage to the oil drain hole, wherein the oil drain hole is connected to the outer surface of the exhaust cover, so that the lubricating oil discharged from the oil drain hole can flow to the exhaust cover, because the temperature of the lubricating oil is lower than the temperature of the exhaust cover, the heat of the exhaust cover can be taken away during the flow of the lubricating oil, thereby achieving a cooling effect, wherein the exhaust cover is also located inside the outer shell, so after the lubricating oil flows through the exhaust cover, it will fall to the bottom of the outer shell again, thereby circulating the lubricating oil, wherein the oil outlet passage is arranged at the upper part, so due to the action of gravity, the lubricating oil discharged from the oil drain hole will move downward, thereby ensuring sufficient contact with the exhaust cover.

[0007] Preferably, the oil drain hole is arranged on the exhaust cover. The oil drain hole is arranged on the exhaust cover, and the oil drain hole is directly connected with the oil outlet oil circuit, thereby ensuring the smoothness of the flow of the lubricating oil, and at the same time ensuring the simplicity of the oil circuit setting and reducing the processing cost.

[0008] Preferably, the exhaust cover is provided with an oil shield, which covers the oil drain hole, and a lateral channel is provided on the side of the oil shield. The exhaust cover is provided with an oil shield, and since the oil shield covers the oil drain hole, the lubricating oil discharged from the oil drain hole will not be discharged directly along the axial direction, but will be discharged to both sides through the lateral channels of the oil shield. The blocking effect of the oil shield reduces the circulation rate of the lubricating oil, thereby increasing the contact time between the lubricating oil and the exhaust cover surface, improving the cooling efficiency, and expanding the circulation path to ensure sufficient contact between the lubricating oil and the exhaust cover.

[0009] Preferably, the exhaust cover comprises a cover body and a connecting plate, and the oil drain hole is arranged through the connecting plate. The exhaust cover comprises a cover body and a connecting plate, and is connected to the cylinder assembly through the connecting plate, wherein the connecting plate is a flat plate structure, and the exhaust hole is arranged on the connecting plate, which can be easily processed.

[0010] Preferably, the oil shield is arranged on the connecting plate, and the cover body is located below the oil shield. The cover body is arranged below the connecting plate, so that the lubricating oil left from both sides of the oil shield can flow downward to the entire cover body, thereby achieving a sufficient cooling effect.

[0011] Preferably, the oil outlet passage is connected with an oil drain pipe, and the oil drain pipe is arranged toward the side wall of the outer shell. The oil outlet passage is not only connected with the oil drain hole, but also connected with the oil drain pipe, wherein the oil in the oil drain pipe is arranged toward the side arm of the outer shell, so that the oil in the oil drain pipe can come into contact with the outer shell, and the lubricating oil will flow downward through the inner wall of the outer shell. Since the outer shell does not directly participate in the operation of the compressor and can realize external heat exchange, the temperature of the outer shell is lower than that of the lubricating oil. When the lubricating oil comes into contact with the outer shell, the temperature of the lubricating oil itself can be reduced. When the lubricating oil falls to the bottom of the outer shell, it can be mixed with the lubricating oil of the cooling exhaust cover, neutralize the lubricating oil temperature of the cooling exhaust cover, thereby reducing the overall lubricating oil temperature, and enter the cycle again to produce a cooling effect.

[0012] Preferably, the oil drain pipe includes an extension pipe extending close to the side wall of the outer shell. The extension pipe is arranged on the oil drain pipe, wherein the extension pipe can shorten the gap between the extension pipe and the side arm of the outer shell, thereby ensuring that the lubricating oil can adhere to the outer shell.

[0013] Preferably, the oil drain hole is a throttle hole. Setting the oil drain hole as a throttle hole can control the amount of oil discharged from the oil drain hole in the oil outlet oil path, prevent all the lubricating oil in the oil outlet oil path from flowing out of the oil drain hole, and at the same time increase the rate of oil discharged from the oil drain hole. In conjunction with the oil retaining cover, it can ensure that the oil forms a relatively uniform oil film covering the exhaust cover from top to bottom.

[0014] Preferably, the cylinder assembly is connected to an oil pump assembly on one side close to the bottom of the outer shell, and the cylinder assembly includes an oil inlet oil circuit connected to the oil pump assembly. The bottom of the cylinder assembly is provided with an oil pump assembly, and the oil pump assembly is arranged at a lower position at the bottom of the outer shell, so that the lubricating oil at the bottom of the outer shell can be transported to the cylinder assembly to achieve the lubricating oil transportation effect. Therefore, an oil inlet oil circuit is arranged between the cylinder assembly and the oil pump assembly to ensure the smooth transportation of the whole process, wherein the oil inlet oil circuit is connected with the oil outlet oil circuit, and an annular oil circuit structure is arranged between the oil inlet oil circuit and the oil outlet oil circuit to ensure the smooth transportation of the oil circuit.

[0015] Preferably, the cylinder assembly includes a cylinder support and a cylinder body, and the cylinder body is provided with an oil groove connecting the oil inlet and the oil outlet. The cylinder support can fix the cylinder body, wherein the cylinder body needs to be continuously lubricated during the movement, and the temperature is reduced by lubricating oil, so an oil groove is provided on the cylinder body, which is connected with the oil inlet and the oil outlet to ensure the delivery of lubricating oil, and cooperates with the annular oil circuit between the oil inlet and the oil outlet to carry out multi-oil transportation, wherein the annular oil circuit can transport oil to the cylinder body to avoid interference.

[0016] The beneficial effects of the utility model are as follows:

[0017] (1) On the basis of ensuring the lubrication and cooling of the entire device, the exhaust cover can be effectively cooled at the same time, making full use of the lubricating oil to ensure the working quality of the compressor;

[0018] (2) It can increase the lubricating oil coverage area of ​​the exhaust cover and improve the cooling effect;

[0019] (3) It can ensure the cooling effect of the lubricating oil and realize the circulation and cooling effect of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the utility model.

[0021] Figure 2 It is a schematic diagram of the local structure.

[0022] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0023] Figure 4 It is a local axonometric drawing of the utility model.

[0024] Figure 5 This is an axonometric view of Example 2.

[0025] Figure 6 This is a partial cross-sectional view of Example 2.

[0026] In the figure:

[0027] 1 outer shell;

[0028] 2 cylinder assembly, 201 cylinder support, 202 cylinder body, 203 oil groove, 204 cylinder piston, 21 oil outlet oil passage, 22 oil inlet oil passage, 23 annular oil passage;

[0029] 3 exhaust cover, 31 cover body, 32 connecting plate;

[0030] 4 oil shield cover, 41 lateral channel;

[0031] 5 oil drain pipe, 51 extension pipe;

[0032] 6 oil pump assembly, 61 oil pump oil outlet hole, 62 oil pump oil inlet hole, 63 oil pump piston;

[0033] 7 Oil drain holes. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Embodiment 1:

[0036] like Figure 1 , 2 As shown in , 3, a refrigeration compressor exhaust cover cooling structure includes an outer shell 1, a cylinder assembly 2 is arranged in the outer shell 1, an exhaust cover 3 is arranged at the end of the cylinder assembly 2, an oil outlet passage 21 is arranged on the upper part of the cylinder assembly 2, the oil outlet passage 21 is connected to an oil drain hole, the oil drain hole is connected to the outer surface of the exhaust cover 3, and the oil drain hole is arranged on the exhaust cover 3.

[0037] In the present embodiment, the oil outlet passage 21 is connected to the oil drain hole, so that the lubricating oil in the oil outlet passage 21 can be partially discharged from the oil drain hole, wherein the oil drain hole is connected to the outer surface of the exhaust cover 3, so that the lubricating oil discharged from the oil drain hole can flow to the exhaust cover 3. Since the temperature of the lubricating oil is lower than the temperature of the exhaust cover 3, the heat of the exhaust cover 3 can be taken away during the flow of the lubricating oil, thereby achieving a cooling effect. Since the exhaust cover 3 is also located inside the outer shell 1, after the lubricating oil flows through the exhaust cover 3, it will fall to the bottom of the outer shell 1 again, thereby circulating the lubricating oil. Since the oil outlet passage 21 is arranged at the upper part, the lubricating oil discharged from the oil drain hole will move downward due to gravity, thereby ensuring sufficient contact with the exhaust cover 3. The oil drain hole is arranged on the exhaust cover 3, and the oil drain hole is directly connected to the oil outlet passage 21, thereby ensuring the smoothness of the flow of the lubricating oil, while ensuring that the oil circuit is simply arranged and reducing the processing cost.

[0038] like Figure 3 , 4 As shown, an oil baffle cover 4 is provided on the exhaust cover 3, the oil baffle cover 4 covers the oil drain hole, a lateral channel 41 is provided on the side of the oil baffle cover 4, the exhaust cover 3 includes a cover body 31 and a connecting plate 32, the oil drain hole is provided through the connecting plate 32, the oil baffle cover 4 is provided on the connecting plate 32, and the cover body 31 is located below the oil baffle cover 4.

[0039] An oil baffle cover 4 is provided on the exhaust cover 3. Since the oil baffle cover 4 covers the oil drain hole, the lubricating oil discharged from the oil drain hole will not be discharged directly along the axial direction, but will be discharged to both sides through the lateral channels 41 of the oil baffle cover 4. The blocking effect of the oil baffle cover 4 reduces the circulation rate of the lubricating oil, thereby increasing the contact time between the lubricating oil and the surface of the exhaust cover 3, improving the cooling efficiency, and expanding the circulation path to ensure sufficient contact between the lubricating oil and the exhaust cover 3. The exhaust cover 3 includes a cover body 31 and a connecting plate 32, which is connected to the cylinder assembly 2 through the connecting plate 32, wherein the connecting plate 32 is a flat plate structure, and the exhaust hole is arranged on the connecting plate 32, which can be easily processed, and the cover body 31 is arranged below the connecting plate 32, so that the lubricating oil retained from both sides of the oil baffle cover 4 can flow downward to the entire cover body 31, thereby achieving a sufficient cooling effect.

[0040] like Figure 1, 2 As shown, the cylinder assembly 2 is connected to an oil pump assembly 6 on one side near the bottom of the outer shell 1, and the cylinder assembly 2 includes an oil inlet oil circuit 22 connected to the oil pump assembly 6. The cylinder assembly 2 includes a cylinder support 201 and a cylinder body 202, and the cylinder body 202 is provided with an oil groove 203 connecting the oil inlet oil circuit 22 and the oil outlet oil circuit 21.

[0041] An oil pump assembly 6 is provided at the bottom of the cylinder assembly 2. The oil pump assembly 6 is provided at a lower position at the bottom of the outer shell 1, so that the lubricating oil at the bottom of the outer shell 1 can be transported to the cylinder assembly 2 to achieve the lubricating oil transportation effect. Therefore, an oil inlet oil passage 22 is provided between the cylinder assembly 2 and the oil pump assembly 6 to ensure smooth transportation of the entire process, wherein the oil inlet oil passage 22 is connected to the oil outlet oil passage 21, and an annular oil passage 23 structure is provided between the oil inlet oil passage 22 and the oil outlet oil passage 21 to ensure smooth transportation of the oil passage. The cylinder body support 201 can fix the cylinder body 202, wherein the cylinder body 202 needs to be constantly lubricated during movement and cooled by lubricating oil. Therefore, an oil groove 203 is provided on the cylinder body 202, which is connected with the oil inlet oil circuit 22 and the oil outlet oil circuit 21 to ensure the delivery of the lubricating oil, and cooperates with the annular oil circuit 23 between the oil inlet oil circuit 22 and the oil outlet oil circuit 21 to perform multi-oil circuit delivery work, wherein the annular oil circuit 23 can transport oil to the cylinder body 202 to avoid interference.

[0042] The assembly and working process of the cooling structure of the exhaust cover of the refrigeration compressor in this embodiment are as follows: In this embodiment, it includes an outer shell 1, a cylinder assembly 2 is arranged inside the outer shell 1, wherein the cylinder assembly 2 includes a cylinder support 201 and a cylinder body 202, a cylinder piston 204 is arranged in the cylinder body 202, and oil circuits interconnected are arranged below the cylinder support 201 and the cylinder body 202 to form an oil inlet oil circuit 22, and oil circuits interconnected are arranged above the cylinder support 201 and the cylinder body 202 to form an oil outlet oil circuit 21, wherein the oil inlet oil circuit 22 is connected to the oil pump outlet hole 61 on the oil pump assembly 6, and the oil pump assembly 6 also includes an oil pump oil inlet hole 62, wherein the oil pump oil inlet hole 62 is located below the oil liquid level inside the outer shell 1, and the cylinder body 202 is also provided with an oil pump oil pump 21. There is an oil groove 203, wherein the oil groove 203 is an annular groove, which is arranged on the inner wall of the cylinder, connecting the oil inlet passage 22 and the oil outlet passage 21 of the upper and lower parts of the cylinder assembly 2, wherein in this embodiment, an exhaust cover 3 is arranged at the end of the cylinder assembly 2, wherein the exhaust cover 3 is located inside the outer shell 1, and the oil outlet passage 21 is located above the cylinder assembly 2, and the exhaust cover 3 includes a cover body 31 and a connecting plate 32, wherein the connecting plate 32 is provided with a through oil drain hole, and the oil drain hole is connected to the oil outlet passage 21, so the oil drain hole is also arranged at a position close to the top, wherein in this embodiment, an oil drain pipe 5 is also arranged, and the oil drain pipe 5 is arranged above the oil drain hole, and the oil drain pipe 5 is also connected to the oil outlet passage 21, and extension pipes 51 are connected on both sides of the oil drain pipe 5, and the extension pipe 51 is arranged close to the inner wall of the outer shell 1.

[0043] During the working process, the oil pump assembly 6 works first, and the internal oil pump piston 63 vibrates. The vibration of the oil pump piston 63 forms a pressure change in the internal space of the oil pump assembly 6. The oil inlet hole 62 of the oil pump regularly sucks the lubricating oil at the bottom of the outer shell 1 under the pressure change. The lubricating oil is discharged from the oil path inside the oil pump piston 63 through the oil pump outlet to the oil outlet oil path 21 between the cylinder support and the cylinder body 202 and forms a certain oil pressure. In addition to the oil groove 202, there is also a pressure between the oil inlet oil path 22 and the oil outlet oil path 21. 3, an annular oil passage 23 is provided between the oil inlet passage 22 and the oil outlet passage 21. A part of the oil in the oil outlet passage 21 enters the oil outlet passage 21 through the oil groove 203 in the cylinder body 202, and another part directly enters the oil outlet passage 21 through the annular oil passage 23. The lubricating oil entering the oil groove 203 is inside the cylinder body and directly contacts the cylinder piston 204 inside the cylinder body. During the reciprocating motion of the cylinder piston 204, the cylinder body 202 and the piston 204 are lubricated at the same time. The oil block 203 is plugged and takes away part of the heat, wherein the lubricating oil flowing upward in the oil groove 203 and the lubricating oil moving upward in the annular oil passage 23 are collected in the oil outlet passage 21, wherein since the oil drain hole is connected with the oil outlet passage 21, the lubricating oil in the oil outlet passage 21 can be discharged through the oil drain hole, wherein the oil drain hole in this embodiment is arranged on the connecting plate 32, and an oil retaining cover 4 is also arranged on the connecting plate 32, wherein in this embodiment, lateral channels 41 are arranged on both sides of the oil retaining cover 4, and the oil retaining cover 4 itself is directly opposite to the oil drain hole The arrangement is such that when lubricating oil is left in the oil drain hole, it can be blocked by the oil blocking cover 4, thereby discharging the lubricating oil to both sides. At the same time, since the oil blocking cover 4 is arranged at the top, the lubricating oil moves downward under the action of gravity, ensuring that the lubricating oil fully covers the outer surface of the exhaust cover 3. Since the heat of the exhaust cover 3 in the compressor is relatively high and the heat of the lubricating oil is relatively low, the lubricating oil takes away part of the heat on the exhaust cover 3 under the action of the temperature difference, completes the heat exchange, and moves downward until it reaches the bottom of the outer shell 1, forming a cycle.

[0044] Embodiment 2:

[0045] like Figure 5 , 6 As shown, different from Example 1, in this embodiment, the oil outlet passage 21 is connected to an oil drain pipe 5, which is arranged toward the side wall of the outer shell 1. The oil drain pipe 5 includes an extension pipe 51 extending close to the side wall of the outer shell 1, and the oil drain hole is a throttling hole.

[0046] The oil outlet passage 21 is not only connected to the oil drain hole, but also connected to the oil drain pipe 5, wherein the oil outlet in the oil drain pipe 5 is arranged toward the side arm of the outer shell 1, so that the oil outlet in the oil drain pipe 5 can come into contact with the outer shell 1, and the lubricating oil will flow downward through the inner wall of the outer shell 1. Since the outer shell 1 is not directly involved in the operation of the compressor and can realize external heat exchange, the temperature of the outer shell 1 is lower than that of the lubricating oil. When the lubricating oil comes into contact with the outer shell 1, the temperature of the lubricating oil itself can be reduced. When the lubricating oil falls to the bottom of the outer shell 1, it can be mixed with the lubricating oil of the cooling exhaust cover 3 to neutralize the cooling exhaust. The lubricating oil temperature of the air cover 3 is reduced, thereby lowering the overall lubricating oil temperature and entering the circulation again to produce a cooling effect. An extension tube 51 is provided on the oil drain pipe 5, wherein the extension tube 51 can shorten the gap between the side arm of the outer shell 1, thereby ensuring that the lubricating oil can adhere to the outer shell 1, and the oil drain hole is set as a throttle hole, which can control the amount of oil discharged from the oil drain hole in the oil outlet oil path 21, and avoid all the lubricating oil in the oil outlet oil path 21 flowing out of the oil drain hole. At the same time, it can increase the rate of oil discharged from the oil drain hole. In conjunction with the oil retaining cover 4, it can ensure that the oil forms a relatively uniform oil film covering the exhaust cover 3 from top to bottom.

[0047] The assembly and working process of the refrigeration compressor exhaust cover cooling structure in this embodiment are as follows: In this embodiment, it includes an outer shell 1, a cylinder assembly 2 is arranged inside the outer shell 1, wherein the cylinder assembly 2 includes a cylinder support 201 and a cylinder body 202, a cylinder piston 204 is arranged in the cylinder body 202, and oil paths that are interconnected are arranged below the cylinder support 201 and the cylinder body 202 to form an oil inlet oil path 22, and oil paths that are interconnected are arranged above the cylinder support 201 and the cylinder body 202 to form an oil outlet oil path 21, wherein the oil inlet oil path 22 is connected to the oil pump outlet hole 61 on the oil pump assembly 6, and the oil pump assembly 6 also includes an oil pump inlet Oil hole 62, wherein the oil pump oil inlet hole 62 is located below the oil level inside the outer shell 1, and an oil groove 203 is also provided on the cylinder body 202, wherein the oil groove 203 is an annular groove, which is arranged on the inner wall of the cylinder, connecting the oil inlet passage 22 and the oil outlet passage 21 of the upper and lower parts of the cylinder assembly 2, wherein in this embodiment, an exhaust cover 3 is provided at the end of the cylinder assembly 2, wherein the exhaust cover 3 is located inside the outer shell 1, and the oil outlet passage 21 is located above the cylinder assembly 2, and the exhaust cover 3 includes a cover body 31 and a connecting plate 32, wherein the connecting plate 32 is provided with a through oil drain hole, and the oil drain hole is connected to the oil outlet passage 21, so the oil drain hole is also provided at a position close to the top.

[0048] During the working process, the oil pump assembly 6 works first, and the internal oil pump piston 63 vibrates. The vibration of the oil pump piston 63 forms a pressure change in the internal space of the oil pump assembly 6. The oil pump oil inlet hole 62 regularly sucks the lubricating oil at the bottom of the outer shell 1 under the pressure change, and the lubricating oil is discharged from the oil channel inside the oil pump piston 63 through the oil pump oil outlet to the oil outlet oil channel 21 between the cylinder support and the cylinder body 202 and forms a certain oil pressure. In addition to the connection between the oil inlet oil channel 22 and the oil outlet oil channel 21 through the oil groove 203, an annular oil channel 23 is also provided between the oil inlet oil channel 22 and the oil outlet oil channel 21. A part of the oil in the oil outlet oil channel 21 enters the oil outlet oil channel 21 through the oil groove 203 in the cylinder body 202, and the other part enters the oil outlet oil channel 21. Part of it directly enters the oil outlet passage 21 through the annular oil passage 23, wherein the lubricating oil entering the oil groove 203 is inside the cylinder body and is in direct contact with the cylinder piston 204 inside the cylinder body, lubricating the cylinder body 202 and the piston at the same time and taking away part of the heat during the reciprocating motion of the cylinder piston 204, wherein the lubricating oil flowing upward in the oil groove 203 and the lubricating oil moving upward in the annular oil passage 23 are collected in the oil outlet passage 21, wherein since the oil drain hole is connected to the oil outlet passage 21, the lubricating oil in the oil outlet passage 21 can be discharged through the oil drain hole, wherein the oil drain hole in this embodiment is arranged on the connecting plate 32, and an oil retaining cover 4 is also arranged on the connecting plate 32, wherein both sides of the oil retaining cover 4 in this embodiment A lateral channel 41 is provided, and the oil retaining cover 4 itself is arranged opposite to the oil drain hole. Therefore, when lubricating oil is left in the oil drain hole, it can be blocked by the oil retaining cover 4, so that the lubricating oil is discharged to both sides. At the same time, since the oil retaining cover 4 is arranged at the top, the lubricating oil moves downward under the action of gravity, ensuring that the lubricating oil fully covers the outer surface of the exhaust cover 3. Since the heat of the exhaust cover 3 in the compressor is relatively high, and the heat of the lubricating oil is relatively low, the lubricating oil takes away part of the heat on the exhaust cover 3 under the action of temperature difference, completes the heat exchange, and moves downward until it reaches the bottom of the outer shell 1 to form a circulation. In this embodiment, an oil drain pipe 5 is connected above the oil outlet oil passage 21, wherein the two sides of the oil drain pipe 5 are connected with extension pipes 51. In this embodiment, the aperture of the oil drain hole The oil drain hole is smaller than the oil drain pipe 5. At this time, due to its small aperture, the oil drain hole can form a throttling and pressurizing effect, so that the pressure of the discharged lubricating oil is greater. The temperature of the lubricating oil will also be reduced during the pressurization process, and at the same time, all the oil in the oil outlet passage 21 is prevented from being discharged from the oil drain hole. The flow rate is controlled so that more lubricating oil moves upward and is discharged from the oil drain pipe 5. In addition, due to the setting of the extension pipe 51, the oil in the refueling pipe can be discharged and attached to the side arm of the outer shell 1. Since the outer shell 1 can realize heat exchange, the temperature of the outer shell 1 is lower than that of the internal lubricating oil. The heat of the lubricating oil can be taken away by the outer shell 1, thereby reducing the temperature of the lubricating oil. In addition, the lubricating oil can fully contact with the outer shell 1 to transfer heat during the movement from top to bottom.After moving to the bottom of the outer shell 1, it mixes with the lubricating oil flowing on the exhaust cover 3, lowering the overall lubricating oil temperature and forming a cycle.

Claims

1. A refrigeration compressor exhaust cover cooling structure, characterized in that: The invention comprises an outer shell (1), a cylinder assembly (2) is arranged inside the outer shell (1), an exhaust cover (3) is arranged at the end of the cylinder assembly (2), an oil outlet passage (21) is arranged at the top of the cylinder assembly (2), the oil outlet passage (21) is connected to an oil outlet hole (7), and the oil outlet hole (7) is connected to the outer surface of the exhaust cover (3).

2. A refrigeration compressor exhaust cover cooling structure according to claim 1, characterized in that: The oil drain hole (7) is arranged on the exhaust cover (3).

3. A refrigeration compressor exhaust cover cooling structure according to claim 1, characterized in that: An oil shielding cover (4) is provided on the exhaust cover (3), the oil shielding cover (4) covers the oil drain hole (7), and a lateral channel (41) is provided on the side of the oil shielding cover (4).

4. A refrigeration compressor exhaust cover cooling structure according to claim 3, characterized in that: The exhaust cover (3) comprises a cover body (31) and a connecting plate (32), and the oil drain hole (7) is arranged through the connecting plate (32).

5. A refrigeration compressor exhaust cover cooling structure according to claim 4, characterized in that: The oil shielding outer cover (4) is arranged on the connecting plate (32), and the cover body (31) is located below the oil shielding outer cover (4).

6. A refrigeration compressor exhaust cover cooling structure according to claim 1, characterized in that: The oil outlet passage (21) is connected to an oil drain pipe (5), and the oil drain pipe (5) is arranged toward the side wall of the outer shell (1).

7. A refrigeration compressor exhaust cover cooling structure according to claim 6, characterized in that: The oil drain pipe (5) comprises an extension pipe (51) extending close to the side wall of the outer shell (1).

8. A refrigeration compressor exhaust cover cooling structure according to any one of claims 1 to 7, characterized in that: The oil discharge hole (7) is a throttle hole.

9. A refrigeration compressor exhaust cover cooling structure according to any one of claims 1 to 7, characterized in that: The cylinder assembly (2) is connected to an oil pump assembly (6) on one side close to the bottom of the outer shell (1), and the cylinder assembly (2) includes an oil inlet passage (22) in communication with the oil pump assembly (6).

10. A refrigeration compressor exhaust cover cooling structure according to claim 9, characterized in that: The cylinder assembly (2) comprises a cylinder support (201) and a cylinder body (202), and the cylinder body (202) is provided with an oil groove (203) communicating with an oil inlet passage (22) and an oil outlet passage (21).

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