Compressor oil filter system capable of being replaced on line

Abstract

The utility model discloses a compressor oil filter system capable of being replaced on line. The oil filter system comprises a first oil filter, a second oil filter, a first oil inlet valve, a second oil inlet valve, a first oil outlet valve and a second oil outlet valve, the first oil filter and the second oil filter are connected in parallel; the first oil filtering shell, the second oil filtering shell, the first valve body and the second valve body are all integrally formed with a casting shell of the compressor, and the first oil filtering filter element, the second oil filtering filter element, the first valve element, the second valve element, the first oil outlet channel and the second oil outlet channel are all arranged in a cavity in the casting shell. According to the scheme, the filter element, the oil outlet valve element and the oil outlet passage are all arranged in the cavity in the casting shell, sealing parts are reduced, the leakage risk of the compressor unit is reduced, and the cost is lower; the two oil filters are arranged in parallel, so that online replacement is realized; the needle valve is installed on the top of the oil filter shell, vacuumizing is not needed, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor oil filters, and in particular to a compressor oil filter system that can be replaced online. Background Art

[0002] With the continuous updating of screw compressor technology, it has been widely used in air conditioning, refrigeration and chemical industries. The working principle of the screw compressor is to drive the screw rotor to rotate through the motor, and compress the refrigerant through the cooperation of the screw rotor and the star wheel, so that the pressure of the refrigerant is increased, and then sent to the condenser through the exhaust port of the compressor. The cooling capacity of the screw compressor is proportional to the exhaust volume of the exhaust port. The larger the exhaust volume, the higher the cooling capacity.

[0003] During the operation of the compressor, in order to increase the service life of the compressor, it is necessary to filter the oil through an oil filter before the oil enters the main oil circuit of the compressor. The oil filter needs to be inspected and replaced after a certain period of use. The existing oil filter system is generally a single oil filter or multiple oil filters in series. The unit needs to be shut down when replacing the oil filter, and it is impossible to replace the oil filter online. For units with a single filter built into the compressor or oil separator, not only does it need to be shut down to replace the filter element, but it also needs to be vacuumed after replacing the filter element. This method of replacing the filter element has a long time cycle and high related costs. Moreover, in some specific application scenarios, the compressor is not allowed to shut down, and customers will require the unit to be designed with the function of online oil filter replacement. The existing online oil filter replacement solutions are all set on the unit pipeline system. The oil filter housing is designed as a pressure vessel, and the valve is also a valve that can withstand high pressure, which is costly. In addition, both the oil filter and the valve need to be connected to the pipeline system with flanges or joints, and there are many sealing parts, which not only brings additional costs, but also increases the risk of leakage in the pipeline system. After the filter element is replaced without stopping the machine, the air remaining in the filter will pollute the system and reduce the system performance. The accumulation of pollution after multiple filter element replacements may seriously affect the performance of the system.

[0004] In view of this, how to solve the above problems existing in the prior art has become the subject to be studied and solved by the present utility model. Utility Model Content

[0005] The purpose of the utility model is to provide an online replaceable compressor oil filter system, which is used to solve the problems of high manufacturing cost and high leakage risk of existing units with "online oil filter replacement function", so that the unit is more environmentally friendly during both the manufacturing process and the use process.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes an online replaceable compressor oil filter system, wherein the oil filter system is arranged on the compressor to supply oil to the main oil circuit of the compressor, and its innovation lies in:

[0007] The oil filtration system comprises a first oil filter, a second oil filter, a first oil inlet valve, a second oil inlet valve, a first oil outlet valve and a second oil outlet valve;

[0008] The first oil filter and the second oil filter are connected in parallel;

[0009] The first oil filter is provided with a first oil inlet and a first oil outlet, the first oil inlet is connected to the oil separator through a first oil inlet passage, the first oil inlet valve is installed on the first oil inlet passage, the first oil outlet is installed at the first oil outlet, and the first oil outlet valve is connected to the main oil circuit of the compressor through the first oil outlet passage;

[0010] The second oil filter is provided with a second oil inlet and a second oil outlet, the second oil inlet is connected to the oil separator through a second oil inlet passage, the oil output of the oil separator is divided into two paths and enters the first oil filter and the second oil filter respectively, the second oil inlet valve is installed on the second oil inlet passage, the second oil outlet valve is installed at the second oil outlet, the second oil outlet valve is connected to the main oil circuit of the compressor through the second oil outlet passage, and the first oil outlet passage and the second oil outlet passage merge into the main oil circuit of the compressor;

[0011] The first oil filter comprises a first oil filter housing and a first oil filter element, the second oil filter comprises a second oil filter housing and a second oil filter element, the first oil outlet valve comprises a first valve body and a first valve core, and the second oil outlet valve comprises a second valve body and a second valve core;

[0012] The first oil filter housing, the second oil filter housing, the first valve body and the second valve body are all integrally formed with the casting housing of the compressor, and the first oil filter element, the second oil filter element, the first valve core, the second valve core, the first oil outlet passage and the second oil outlet passage are all arranged in the cavity inside the casting housing.

[0013] The relevant contents of this utility model are explained as follows:

[0014] 1. In the above technical scheme of the utility model, the oil filter system is mainly equipped on the compressor, the oil filter housing and the oil outlet valve body are integrally formed with the casting housing of the compressor, the filter element, the oil outlet valve core, and the oil outlet passage are all arranged in the cavity in the casting housing, the sealing parts are greatly reduced, and the leakage risk of the compressor unit is greatly reduced, and the cost is lower; by arranging the first oil filter and the second oil filter in parallel, one of the oil filters is working and the other oil filter is on standby, when the filter element needs to be replaced, the standby oil filter is started, and the inactive oil filter is replaced with the filter element and then kept on standby, and the filter element replacement does not require the compressor to be shut down, so that online replacement can be achieved.

[0015] 2. In the above technical solution, a first cover plate is installed on the top of the first oil filter housing, and the first cover plate and the first oil filter housing are sealed by an O-ring. A first needle valve is installed on the first cover plate to exhaust the air in the first oil filter, without the need for vacuum exhaustion, thereby reducing costs.

[0016] 3. In the above technical solution, a second cover plate is arranged on the top of the second oil filter housing, and the second cover plate and the second oil filter housing are sealed by an O-ring. A second needle valve is installed on the second cover plate to exhaust the air in the second oil filter, without vacuuming the air, thereby reducing costs.

[0017] 4. In the above technical solution, a first filter element guide rod is installed at the bottom of the first oil filter element, a through hole for oil to pass through is arranged inside the first filter element guide rod, the bottom of the first filter element guide rod extends into the first oil outlet of the first oil filter, and the oil of the first oil filter element is introduced into the first oil outlet, the filter element guide rod extending into the first oil outlet part is sealed with the casting shell through an O-ring, the first oil outlet is connected with the first oil outlet passage through the first oil outlet valve, and the entire oil outlet passage is in the casting shell, reducing the risk of leakage.

[0018] 5. In the above technical solution, a second filter element guide rod is installed at the bottom of the second oil filter element, a through hole for oil to pass through is arranged inside the second filter element guide rod, the bottom of the second filter element guide rod extends into the second oil outlet of the second oil filter, and the oil of the second oil filter element is introduced into the second oil outlet, the filter element guide rod extending into the second oil outlet part is sealed with the casting shell through an O-ring, the second oil outlet is connected with the second oil outlet passage through the second oil outlet valve, and the entire oil outlet passage is in the casting shell, reducing the risk of leakage.

[0019] 6. In the above technical solution, the first valve body of the first oil outlet valve and the first valve core are threadedly connected, and the second valve body of the second oil outlet valve and the second valve core are threadedly connected. When the first valve core and the second valve core are screwed to the bottom, they respectively block their own oil circuits. The first valve body and the second valve body are both integrally formed casting shells. The first valve core and the second valve core are both arranged in the casting shell, with low leakage risk. O-rings are both mounted on the first valve core and the second valve core, and the two O-rings are respectively in contact with the first valve body and the second valve body.

[0020] 7. In the above technical solution, the central axes of the first valve core and the first oil outlet passage coincide, and the diameter of the bottom end of the first valve core is larger than the diameter of the first oil outlet passage. When the first valve core blocks the oil passage, the first valve core is pressed tightly against the casting shell at the first oil outlet passage through the first sealing gasket. The first sealing gasket is in contact connection with the casting shell. The first sealing gasket is a metal gasket, and the inner hole has a thread for disassembly and assembly, and the outer diameter has an interference fit with the casting shell to prevent it from falling off.

[0021] 8. In the above technical solution, the central axes of the second valve core and the second oil outlet passage coincide, and the diameter of the bottom end of the second valve core is larger than the diameter of the second oil outlet passage. When the second valve core blocks the oil passage, the second valve core is pressed tightly against the casting shell at the first oil outlet passage through the second sealing gasket. The second sealing gasket is contact-connected with the casting shell. The second sealing gasket is a metal gasket, and the inner hole has a thread for disassembly and assembly, and the outer diameter has an interference fit with the casting shell to prevent it from falling off.

[0022] 9. In the above technical solution, the first oil filter and the second oil filter are symmetrically arranged, the first oil outlet valve and the second oil outlet valve are arranged on one side of the casting shell, and a valve core limit plate is installed on the casting shell to prevent the valve core from falling out through a single valve core limit plate.

[0023] 10. In the above technical solution, the first oil inlet valve and the second oil inlet valve can be built into the casting shell of the compressor, but the utility model is not limited to this. The first oil inlet valve and the second oil inlet valve can be externally placed on the compressor.

[0024] 11. In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] 12. In the present utility model, the orientation or position relationship indicated by the terms "upper", "lower", "bottom", "inside", "outside", etc. is based on the orientation or position assembly relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0026] 13. In addition, in the description of the present invention, it should be noted that if the words "first", "second" and so on are used in this document to limit the components, those skilled in the art should know that the use of the words "first", "second" and so on is only for the convenience of describing the present invention and simplifying the description. If not otherwise stated, the above words have no special meaning.

[0027] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0028] 1. The above solution of the utility model, by equipping the oil filter system on the compressor, the oil filter housing and the oil outlet valve body are integrally formed with the casting housing of the compressor, the filter element, the oil outlet valve core, and the oil outlet passage are all arranged in the cavity in the casting housing, the sealing parts are greatly reduced, the leakage risk of the compressor unit is greatly reduced, and the cost is lower;

[0029] 2. The above scheme of the utility model is to set the first oil filter and the second oil filter in parallel, wherein one oil filter is in operation and the other oil filter is in standby mode. When the filter element needs to be replaced, the standby oil filter is started, and the inactive oil filter is replaced with the filter element and then put into standby mode. The filter element replacement does not require the compressor to be shut down, and online replacement is achieved.

[0030] 3. The above solution of the utility model installs a needle valve on the top of the oil filter housing to exhaust the air inside the oil filter without vacuuming, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the principle of a compressor oil filter system that can be replaced online according to an embodiment of the utility model;

[0032] Figure 2 This is a three-dimensional structural diagram of a compressor oil filter system that can be replaced online according to an embodiment of the utility model, which is equipped on a compressor;

[0033] Figure 3 A two-dimensional diagram of an online replaceable compressor oil filter system equipped on a compressor according to an embodiment of the utility model (viewing angle 1);

[0034] Figure 4Two-dimensional diagram of the compressor oil filter system that can be replaced online according to the embodiment of the utility model installed on the compressor (viewing angle 2)

[0035] Figure 5 For the utility model embodiment Figure 3 Sectional view in the middle AA direction;

[0036] Figure 6 For the utility model embodiment Figure 3 Cross-section in the middle BB direction;

[0037] Figure 7 For the utility model embodiment Figure 4 Enlarged view of part I;

[0038] Figure 8 This is a schematic diagram of the system principle when the first oil inlet valve and the second oil inlet valve are externally arranged on the compressor in an embodiment of the utility model.

[0039] The various parts of the above drawings are shown as follows:

[0040] 100. Oil filter system;

[0041] 200. Compressor;

[0042] 1. a first oil filter, 11. a first oil inlet, 12. a first oil filter housing, 13. a first oil filter element, 14. a first cover plate, 15. a first needle valve, 16 a first filter element guide rod, 17. a first sealing gasket;

[0043] 2. a second oil filter, 21. a second oil inlet, 22. a second oil filter housing, 23. a second oil filter element, 24. a second cover plate, 25. a second needle valve, 26. a second filter element guide rod, 27. a second sealing gasket;

[0044] 3. The first oil inlet valve;

[0045] 4. Second oil inlet valve;

[0046] 5. a first oil outlet valve, 51. a first valve body, 52. a first valve core;

[0047] 6. a second oil outlet valve, 61. a second valve body, 62. a second valve core;

[0048] 7. The first oil outlet passage;

[0049] 8. Second oil outlet passage;

[0050] 91. O-ring;

[0051] 92. Valve core limit plate. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0053] The utility model aims to provide a compressor oil filter system which can be replaced online. The oil filter element can be replaced without stopping the machine. The filter housing and the valve core housing are integrally formed with the compressor, with ingenious design, fewer sealing components and low cost.

[0054] Embodiment, as attached Figures 1 to 7 As shown, the embodiment of the utility model discloses an online replaceable compressor oil filter system, wherein the oil filter system 100 is arranged on a compressor 200 to supply oil to the main oil circuit of the compressor.

[0055] As attached Figure 1 As shown, the oil filtration system 100 includes a first oil filter 1, a second oil filter 2, a first oil inlet valve 3, a second oil inlet valve 4, a first oil outlet valve 5 and a second oil outlet valve 6;

[0056] The first oil filter 1 and the second oil filter 2 are connected in parallel;

[0057] The first oil filter 1 is provided with a first oil inlet 11 and a first oil outlet, the first oil inlet 11 is connected to the oil separator through a first oil inlet passage, the first oil inlet valve 3 is installed on the first oil inlet passage, the first oil outlet valve 5 is installed at the first oil outlet, and the first oil outlet valve 5 is connected to the main oil circuit of the compressor through a first oil outlet passage 7;

[0058] The second oil filter 2 is provided with a second oil inlet 21 and a second oil outlet, the second oil inlet 21 is connected to the oil separator through a second oil inlet passage, the oil outlet of the oil separator is divided into two paths and enters the first oil filter 1 and the second oil filter 2 respectively, the second oil inlet valve 4 is installed on the second oil inlet passage, the second oil outlet valve 6 is installed at the second oil outlet, the second oil outlet valve 6 is connected to the compressor main oil circuit through a second oil outlet passage 8, and the first oil outlet passage 7 and the second oil outlet passage 8 merge in the compressor main oil circuit;

[0059] The first oil filter 1 includes a first oil filter housing 12 and a first oil filter element 13, the second oil filter 2 includes a second oil filter housing 22 and a second oil filter element 23, the first oil outlet valve 5 includes a first valve body 51 and a first valve core 52, and the second oil outlet valve 6 includes a second valve body 61 and a second valve core 62;

[0060] The first oil filter housing 12, the second oil filter housing 22, the first valve body 51 and the second valve body 61 are all integrally formed with the housing of the compressor 200. Figure 2-4 As shown, the whole is an integrally formed casting housing, the first oil filter element 13, the second oil filter element 23, the first valve core 52, the second oil outlet valve core 6, the first oil outlet passage 7 and the second oil outlet passage 8 are all arranged in the cavity inside the casting housing, as shown in the attached Figure 5-6 shown.

[0061] Through the implementation of the embodiment of the utility model, mainly by equipping the compressor with an oil filter system, the oil filter housing and the oil outlet valve body are integrally formed with the casting housing of the compressor, the filter element, the oil outlet valve core, and the oil outlet passage are all arranged in the cavity in the casting housing, the sealing parts are greatly reduced, and the leakage risk of the compressor unit is greatly reduced, and the cost is lower; by arranging the first oil filter 1 and the second oil filter 2 in parallel, one of the oil filters is working and the other oil filter is on standby, when the filter element needs to be replaced, the standby oil filter is started, and the disabled oil filter is replaced with the filter element and then kept on standby, and the filter element replacement does not require the compressor to be shut down, so that online replacement can be achieved.

[0062] In the embodiment of the utility model, a first cover plate 14 is installed on the top of the first oil filter housing 12, and the first cover plate 14 and the first oil filter housing 12 are sealed by an O-ring 91. A first needle valve 15 is installed on the first cover plate 14, which is used to evacuate the air in the first oil filter 1, and there is no need to evacuate the air by vacuum, which reduces the cost. A second cover plate 24 is set on the top of the second oil filter housing 22, and the second cover plate 24 and the second oil filter housing 22 are sealed by an O-ring 91. A second needle valve 25 is installed on the second cover plate 24, which is used to evacuate the air in the second oil filter 2, and there is no need to evacuate the air by vacuum, which reduces the cost.

[0063] The replacement process of the compressor oil filter system that can be replaced online in the embodiment of the utility model can be referred to as follows: (1) During normal operation, the oil from the oil separator is supplied to the main oil circuit of the compressor through the first oil filter 1, the first oil inlet valve 3 and the first oil outlet valve 5 are fully opened, and the second oil inlet valve 4 and the second oil outlet valve 6 are fully closed. At this time, the first oil filter 1 is working and the second oil filter 2 is on standby; (2) When the first oil filter 1 meets the replacement conditions, the second oil inlet valve 4 and the second oil outlet valve 6 are fully opened, and then the first oil inlet valve 3 and the first oil outlet valve 5 are closed. At this time, the second oil filter 2 is working and the first oil filter 1 is to be replaced; (3) The first cover plate 14 of the first oil filter 1 is disassembled, and a new first oil filter element 13 and the corresponding first oil filter element 13 are replaced after preliminary cleaning. The seal is then reinstalled. At this time, the internal space of the first oil filter 1 is filled with air; (4) the first oil inlet valve 3 and the first needle valve 15 are slightly opened, and the high-pressure oil from the oil separator is injected into the first oil filter 1 to exhaust the air from the first needle valve 15. When the first needle valve 15 does not exhaust air but only discharges oil, the internal air is exhausted, the first needle valve 15 and the first oil inlet valve 3 are closed, and the first oil filter 1 enters the standby state; (5) when the second oil filter 2 reaches the replacement condition, the first oil inlet valve 3 and the first oil outlet valve 5 are fully opened, and then the second oil inlet valve 4 and the second oil outlet valve 6 are closed. At this time, the first oil filter 1 works and the second oil filter element 23 is replaced. This is repeated to achieve online replacement of the oil filter.

[0064] In the embodiment of the utility model, a first filter element guide rod 16 is installed at the bottom of the first oil filter element 13, and a through hole for oil to pass through is arranged inside the first filter element guide rod 16. The bottom of the first filter element guide rod 16 extends into the first oil outlet of the first oil filter 1 to introduce the oil of the first oil filter element 13 into the first oil outlet. The filter element guide rod extending into the first oil outlet is sealed with the casting housing through an O-ring 91. The first oil outlet is connected with the first oil outlet passage 7 through the first oil outlet valve 5. The entire oil outlet passage is in the casting housing to reduce the risk of leakage. A second filter element guide rod 26 is installed at the bottom of the second oil filter element 23, and a through hole for oil to pass through is arranged inside the second filter element guide rod 26. The bottom of the second filter element guide rod 26 extends into the second oil outlet of the second oil filter 2, and the oil of the second oil filter element 23 is introduced into the second oil outlet. The filter element guide rod extending into the second oil outlet part is sealed with the casting housing through an O-ring 91. The second oil outlet is connected with the second oil outlet passage 8 through the second oil outlet valve 6. The entire oil outlet passage is in the casting housing to reduce the risk of leakage.

[0065] In the embodiment of the utility model, the first valve body 51 of the first oil outlet valve 5 and the first valve core 52 are threadedly connected, and the second valve body 61 of the second oil outlet valve 6 and the second oil outlet valve 6 core are threadedly connected. When the first valve core 52 and the second oil outlet valve 6 core are screwed to the bottom, their respective oil circuits are blocked respectively. The first valve body 51 and the second valve body 61 are both integrally formed casting shells, and the first valve core 52 and the second oil outlet valve 6 core are both arranged in the casting shell, with low leakage risk. O-rings 91 are both sleeved on the first valve core 52 and the second oil outlet valve 6 core, and the two O-rings 91 are respectively in contact with the first valve body 51 and the second valve body 61.

[0066] In the embodiment of the utility model, the central axes of the first valve core 52 and the first oil outlet passage 7 coincide, and the diameter of the bottom end of the first valve core 52 is larger than the diameter of the first oil outlet passage 7. When the first valve core 52 blocks the oil passage, the first valve core 52 is pressed tightly against the casting shell at the first oil outlet passage 7 through the first sealing gasket 17. The first sealing gasket 17 is in contact with the casting shell. The first sealing gasket 17 is a metal gasket, and the inner hole has a thread for disassembly and assembly, and the outer diameter has an interference fit with the casting shell to prevent it from falling off. The central axes of the second oil outlet valve 6 core and the second oil outlet passage 8 coincide, and the diameter of the bottom end of the second oil outlet valve 6 core is larger than the diameter of the second oil outlet passage 8. When the second oil outlet valve 6 core blocks the oil passage, the second oil outlet valve 6 core is pressed tightly against the casting shell at the first oil outlet passage 7 through the second sealing gasket 27. The second sealing gasket 27 is in contact with the casting shell. The second sealing gasket 27 is a metal gasket, and the inner hole has a thread for disassembly and assembly, and the outer diameter has an interference fit with the casting shell to prevent it from falling off.

[0067] In the embodiment of the utility model, the first oil filter 1 and the second oil filter 2 are symmetrically arranged, the first oil outlet valve 5 and the second oil outlet valve 6 are arranged on one side of the casting shell, and a valve core limiting plate 92 is installed on the casting shell to prevent the valve core from falling out through a single valve core limiting plate 92.

[0068] In addition, it should be noted that Figure 1 As shown, the first oil inlet valve and the second oil inlet valve can be built into the casting housing of the compressor, but the utility model is not limited thereto. Figure 8 As shown, the first oil inlet valve and the second oil inlet valve may also be externally disposed on the compressor.

[0069] Through the implementation of the embodiment of the utility model, the purpose of online replacement of the oil filter is achieved, and the structural design is ingenious. The oil filter housing and the oil outlet valve body are integrally formed with the casting housing of the compressor, and the filter element, the oil outlet valve core, and the oil outlet passage are all arranged in the cavity in the casting housing. The sealing parts are greatly reduced, which greatly reduces the leakage risk of the compressor unit and reduces the cost.

[0070] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A compressor oil filter system that can be replaced online, the oil filter system (100) being arranged on a compressor (200) to supply oil to a main oil circuit of the compressor (200), characterized in that: The oil filter system (100) comprises a first oil filter (1), a second oil filter (2), a first oil inlet valve (3), a second oil inlet valve (4), a first oil outlet valve (5) and a second oil outlet valve (6); The first oil filter (1) and the second oil filter (2) are connected in parallel; The first oil filter (1) is provided with a first oil inlet (11) and a first oil outlet, the first oil inlet (11) is connected to the oil separator through a first oil inlet passage, the first oil inlet valve (3) is installed on the first oil inlet passage, the first oil outlet valve (5) is installed at the first oil outlet, and the first oil outlet valve (5) is connected to the main oil circuit of the compressor (200) through a first oil outlet passage (7); The second oil filter (2) is provided with a second oil inlet (21) and a second oil outlet. The second oil inlet (21) is connected to the oil separator through a second oil inlet passage. The oil outlet of the oil separator is divided into two paths and enters the first oil filter (1) and the second oil filter (2) respectively. The second oil inlet valve (4) is installed on the second oil inlet passage. The second oil outlet valve (6) is installed at the second oil outlet. The second oil outlet valve (6) is connected to the main oil circuit of the compressor (200) through a second oil outlet passage (8). The first oil outlet passage (7) and the second oil outlet passage (8) merge in the main oil circuit of the compressor (200). The first oil filter (1) comprises a first oil filter housing (12) and a first oil filter element (13); the second oil filter (2) comprises a second oil filter housing (22) and a second oil filter element (23); the first oil outlet valve (5) comprises a first valve body (51) and a first valve core (52); and the second oil outlet valve (6) comprises a second valve body (61) and a second valve core (62); The first oil filter housing (12), the second oil filter housing (22), the first valve body (51) and the second valve body (61) are all integrally formed with the casting housing of the compressor (200), and the first oil filter element (13), the second oil filter element (23), the first valve core (52), the second valve core (62), the first oil outlet passage (7) and the second oil outlet passage (8) are all arranged in a cavity inside the casting housing.

2. The online replaceable compressor oil filter system according to claim 1, characterized in that: A first cover plate (14) is installed on the top of the first oil filter housing (12); the first cover plate (14) and the first oil filter housing (12) are sealed via an O-ring; a first needle valve (15) is installed on the first cover plate (14) for exhausting air from the first oil filter (1).

3. The online replaceable compressor oil filter system according to claim 1, characterized in that: A second cover plate (24) is arranged on the top of the second oil filter housing (22); the second cover plate (24) and the second oil filter housing (22) are sealed via an O-ring; a second needle valve (25) is installed on the second cover plate (24) for exhausting air from the second oil filter (2).

4. The online replaceable compressor oil filter system according to claim 1, characterized in that: A first filter element guide rod (16) is installed at the bottom of the first oil filter element (13), a through hole for oil to pass through is arranged inside the first filter element guide rod (16), the bottom of the first filter element guide rod (16) extends into the first oil outlet of the first oil filter (1), the filter element guide rod extending into the first oil outlet is sealed with the casting housing through an O-ring, and the first oil outlet is connected to the first oil outlet passage (7) through the first oil outlet valve (5).

5. The online replaceable compressor oil filter system according to claim 1, characterized in that: A second filter element guide rod (26) is installed at the bottom of the second oil filter element (23), and a through hole for oil to pass through is arranged inside the second filter element guide rod (26). The bottom of the second filter element guide rod (26) extends into the second oil outlet of the second oil filter (2). The filter element guide rod extending into the second oil outlet is sealed with the casting housing through an O-ring, and the second oil outlet is connected to the second oil outlet passage (8) through the second oil outlet valve (6).

6. The compressor oil filter system capable of online replacement according to claim 1, characterized in that: The first valve body (51) of the first oil outlet valve (5) and the first valve core (52) are threadedly connected, and the second valve body (61) of the second oil outlet valve (6) and the second valve core (62) are threadedly connected. When the first valve core (52) and the second valve core (62) are screwed to the bottom, their respective oil paths are blocked. O-rings are sleeved on the first valve core (52) and the second valve core (62), and the two O-rings are respectively in contact with the first valve body (51) and the second valve body (61).

7. The compressor oil filter system that can be replaced online according to claim 1, characterized in that: The central axes of the first valve core (52) and the first oil outlet passage (7) coincide with each other, and the diameter of the bottom end of the first valve core (52) is larger than the diameter of the first oil outlet passage (7). When the first valve core (52) blocks the oil passage, the first valve core (52) is pressed tightly against the casting housing at the first oil outlet passage (7) through the first sealing gasket (17), and the first sealing gasket (17) is in contact with the casting housing.

8. The compressor oil filter system capable of online replacement according to claim 1, characterized in that: The central axes of the second valve core (62) and the second oil outlet passage (8) coincide with each other, and the diameter of the bottom end of the second valve core (62) is larger than the diameter of the second oil outlet passage (8). When the second valve core (62) blocks the oil passage, the second valve core (62) is pressed tightly against the casting housing at the first oil outlet passage (7) through the second sealing gasket (27), and the second sealing gasket (27) is in contact with the casting housing.

9. The compressor oil filter system capable of online replacement according to claim 1, characterized in that: The first oil filter (1) and the second oil filter (2) are symmetrically arranged, the first oil outlet valve (5) and the second oil outlet valve (6) are arranged on one side of the casting shell, and a valve core limiting plate (92) is installed on the casting shell to prevent the valve core from falling out.

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