Suction variable pressure valve and compressor parallel system

Abstract

The application provides an air suction variable pressure valve and a compressor combined system, which comprises a valve body, an air suction channel for connecting an air suction port of a compressor, a valve core arranged in the valve body and capable of extending into and out of the air suction channel to change the flow area of the air suction channel, and a driving structure arranged between the valve body and the valve core, the driving structure being in a first state to make the valve core extend into the air suction channel, and the driving structure being in a second state to make the valve core extend out of the air suction channel. Thus, the air suction variable pressure valve can be used to make real-time adjustment according to different working conditions or flow rates, so that the compressor can achieve better pressure equalization effect under various working conditions, and repeated disassembly and adjustment are not needed, and the air suction variable pressure valve has better reliability and safety.

Description

Technical Field

[0001] This application relates to the field of air conditioning system technology, specifically to a parallel system of an intake pressure regulating valve and a compressor. Background Technology

[0002] Parallel compressor technology is increasingly widely used in the air conditioning and refrigeration industry, offering advantages such as convenient energy regulation, high efficiency, easy maintenance during single-unit shutdown, and low cost. When multiple compressors are connected in parallel, to prevent them from operating without oil or with insufficient oil, an oil level sensor is typically installed on the compressor's oil sump. When the oil level in the compressor's oil sump falls below the sensor's position, the compressor will be shut down as a safety measure. The compressor will only restart when the oil level returns to above the sensor's activation position.

[0003] However, this oil level protection method has a problem: the compressor can only return oil to the stopped compressor through the migration of lubricating oil after it stops or by another compressor running. This causes large fluctuations in the overall system operation, and compressor shutdown also leads to a decrease in system capacity, making it unable to meet load demands. Furthermore, the internal pressure of the stopped compressor in a parallel system is higher than that of the running compressor, making it difficult for the lubricating oil in the oil-rich compressor to be pumped into the stopped, low-oil compressor, causing the low-oil compressor to remain shut down for extended periods and unable to start. Utility Model Content

[0004] In view of this, this application provides a parallel system of intake pressure regulating valve and compressor, which can solve the problem of compressor failing to start after a long period of shutdown due to lack of oil.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] An intake pressure transformer valve, comprising:

[0007] The valve body has an intake passage for connecting to the intake port of the compressor;

[0008] A valve core is disposed in the valve body and can extend into and out of the intake channel to change the flow area of ​​the intake channel;

[0009] A drive structure is disposed between the valve body and the valve core. When the drive structure is in a first state, the valve core extends into the intake channel. When the drive structure is in a second state, the valve core extends out of the intake channel.

[0010] Optionally, the valve body includes:

[0011] The three-way valve seat has two straight ports and one side port, forming the air intake passage between the two straight ports;

[0012] A valve sleeve is fitted around the outer periphery of the valve core and connected to the side port of the three-way valve seat, so that the valve core extends into and out of the intake passage through the side port.

[0013] Optionally, a first sealing structure surrounding the valve core is provided between the valve sleeve and the three-way valve seat;

[0014] A second sealing structure is provided between the valve sleeve and the valve core, surrounding the valve core.

[0015] Optionally, the valve core has a plate portion that can extend into and out of the intake channel to change the flow area of ​​the intake channel.

[0016] Optionally, the plate portion is perpendicular to the flow direction of the air intake channel.

[0017] Optionally, the driving structure includes:

[0018] A high-pressure interface is provided on the valve body, connected to one side of the valve core, and used to connect to the exhaust port of the compressor, so that the high pressure in the high-pressure interface can drive the valve core to extend into the intake channel.

[0019] A first elastic element is disposed between the valve core and the valve body, and is capable of driving the valve core to extend out of the intake channel.

[0020] Optionally, the valve body is provided with a sliding channel, the first end of the sliding channel is connected to the high-pressure interface and the second end is connected to the intake channel; the valve core has a core portion that slides with the sliding channel, and the first elastic element is located between the core portion and the second end of the sliding channel, and can drive the core portion to move to the first end of the sliding channel.

[0021] Optionally, a third sealing structure is provided between the end face of the core near the high-pressure interface and the valve body, surrounding the high-pressure interface, so that the valve core can block the sliding channel and the high-pressure interface under the action of the first elastic element.

[0022] Optionally, a fourth sealing structure is provided between the core and the sidewall of the sliding channel;

[0023] The core is provided with a pressure relief channel. The first end of the pressure relief channel is located between the fourth sealing structure and the third sealing structure, and the second end is located on the side of the fourth sealing structure away from the third sealing structure, so as to release the high pressure of the high pressure interface into the intake channel when the drive structure is in the second state.

[0024] Optionally, the first end of the pressure relief channel is located on the end face of the core near the high-pressure interface and outside the third sealing structure; the second end of the pressure relief channel is located on the end face of the core away from the high-pressure interface.

[0025] Optionally, the driving structure includes:

[0026] An electromagnetic component has a first magnetic pole and a second magnetic pole. The first magnetic pole is disposed on the valve core, and the second magnetic pole is disposed on the valve body. When the electromagnetic component is energized, the first magnetic pole and the second magnetic pole are brought close together.

[0027] The second elastic element is disposed between the valve core and the valve body, and is capable of driving the first magnetic pole and the second magnetic pole away from each other;

[0028] When the first magnetic pole and the second magnetic pole are close to or far apart, the valve core extends into the air intake channel.

[0029] Optionally, the first magnetic pole, the second magnetic pole, and the second elastic element are all located on the side of the valve core away from the intake channel, and the second elastic element is located between the first magnetic pole and the second magnetic pole.

[0030] A compressor parallel system includes a plurality of compressors connected in parallel, wherein the suction ports of the compressors are connected to a suction pressure regulating valve according to any of the preceding claims.

[0031] Optionally, it includes an oil level sensor and a solenoid valve, wherein the oil level sensor is disposed on the compressor and is used to detect the oil level of the compressor;

[0032] The drive structure has a high-pressure interface, which is connected to the compressor's exhaust port via the solenoid valve. The solenoid valve is communicatively connected to the oil level sensor to control the opening and closing of the solenoid valve based on the sensing value of the oil level sensor.

[0033] Optionally, an oil level sensor is included, which is disposed on the compressor and used to detect the oil level of the compressor;

[0034] The drive structure has an electromagnetic component that is communicatively connected to the oil level sensor to control the on / off state of the electromagnetic component based on the sensing value of the oil level sensor.

[0035] According to the suction pressure regulating valve and compressor parallel system provided in this application, during use, the suction pressure regulating valve is installed at the suction port of the compressor. By switching between a first and second state via a drive structure, the valve core can extend into and out of the suction channel of the valve body, changing the flow area of ​​the suction channel and thus adjusting the suction flow rate at the compressor's suction port and regulating the internal pressure chamber pressure of the compressor. Therefore, using this suction pressure regulating valve allows for real-time adjustment according to different operating conditions or flow rates, enabling the compressor to achieve better pressure equalization under various operating conditions. Furthermore, it eliminates the need for repeated disassembly and adjustment, exhibiting good reliability and safety. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0037] Figure 1 This is a cross-sectional view of the intake pressure regulating valve according to a first embodiment of this application;

[0038] Figure 2 This is a cross-sectional view of the intake pressure regulating valve according to a second embodiment of this application;

[0039] Figure 3 A perspective view of a valve core according to some embodiments of this application;

[0040] Figure 4 This is a perspective view of a three-way valve seat according to some embodiments of this application;

[0041] Figure 5 This is a schematic diagram of a compressor parallel system according to some embodiments of this application;

[0042] Figure 6 This is a schematic diagram of a compressor parallel system according to some other embodiments of this application.

[0043] In the picture:

[0044] 1. Three-way valve seat; 11. Intake passage; 12. Side port; 13. Straight port; 2. Valve sleeve; 21. High-pressure interface; 22. Sliding passage; 3. Valve core; 31. Core; 32. Plate; 33. Rod; 34. Pressure relief passage; 4. First elastic element; 5. Second elastic element; 6. Electromagnetic assembly; 61. First magnetic pole; 62. Second magnetic pole; 63. Electromagnetic coil; 7. First sealing structure; 8. Second sealing structure; 9. Third sealing structure; 10. Intake pressure transformer valve; 101. Valve body; 102. Drive structure; 20. Oil level sensor; 30. Solenoid valve; 40. Compressor; 401. Intake port; 402. Exhaust port. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] like Figures 1-6 As shown, this application embodiment provides an intake pressure regulating valve 10, including a valve body 101, a valve core 3, and a drive structure 102. The intake pressure regulating valve 10 is used to be installed at the intake port 401 of the compressor 40 in a parallel unit, for example, the intake pressure regulating valve 10 is installed between the intake port 401 of the compressor 40 and the intake pipeline of the parallel unit.

[0047] The valve body 101 is provided with a suction channel 11 for communicating with the suction port 401 of the compressor 40. Specifically, the suction channel 11 has two ports, one port is connected to the suction port 401 of the compressor 40 and the other port is connected to the suction pipeline of the parallel unit, or the suction channel 11 is set on the suction pipeline and close to the suction port 401 of the compressor 40, so that the suction port 401 of the compressor 40 is connected to the suction pipeline through the suction channel 11.

[0048] The valve core 3 can be displaced within the valve body 101. By displacing the valve core 3 relative to the valve body 101, the valve core 3 can extend into and out of the intake channel 11 of the valve body 101, thereby changing the flow area of ​​the intake channel 11. For example, when the valve core 3 extends into the intake channel 11, the flow area of ​​the intake channel 11 decreases; when the valve core 3 extends out of the intake channel 11, the flow area of ​​the intake channel 11 increases. By adjusting the position of the valve core 3 relative to the valve body 101, the flow area of ​​the intake channel 11 can be adjusted.

[0049] A drive structure 102 is disposed between the valve body 101 and the valve core 3. Under the action of the drive structure 102, the valve core 3 can be displaced relative to the valve body 101, so that the valve core 3 extends into and out of the intake passage 11. The drive structure 102 has a first state and a second state. When the drive structure 102 is in the first state, the valve core 3 extends into the intake passage 11; when the drive structure 102 is in the second state, the valve core 3 extends out of the intake passage 11. For example, the drive structure 102 can be configured as manual, pneumatic, or electric.

[0050] In use, the suction pressure regulating valve 10 is installed at the suction port 401 of the compressor 40. By switching between a first and second state via the drive structure 102, the valve core 3 can extend into and out of the suction channel 11 of the valve body 101, changing the flow area of ​​the suction channel 11 and thus adjusting the suction flow rate at the suction port 401 of the compressor 40, and regulating the internal pressure chamber pressure of the compressor 40. Therefore, by using this suction pressure regulating valve 10, real-time adjustment can be made according to different operating conditions or flow rates, enabling the compressor 40 to achieve better pressure equalization under various operating conditions. Furthermore, it eliminates the need for repeated disassembly and reassembly of pipelines for debugging, exhibiting good reliability and safety.

[0051] In some embodiments, the valve body 101 includes a three-way valve seat 1 and a valve sleeve 2. The three-way valve seat 1 has a T-shaped structure with two straight ports and one side port 12, forming the aforementioned suction channel 11 between the two straight ports. During installation, the two straight ports are respectively connected to the suction port 401 of the compressor 40 and the suction pipeline of the parallel unit. The valve sleeve 2 is connected to the side port 12 of the three-way valve seat 1 so that the interior of the valve sleeve 2 communicates with the suction channel 11 through the side port 12. Specifically, the valve sleeve 2 is fitted and threaded onto the outer periphery of the side port 12 to form the valve body 101.

[0052] The valve sleeve 2 is fitted around the outer periphery of the valve core 3 to form a wrap around the valve core 3. A portion of the valve core 3 is located inside the valve sleeve 2, and another portion is located inside the side opening 12 of the three-way valve seat 1, so that the valve core 3 extends into and out of the intake passage 11 through the side opening 12 of the three-way valve seat 1. In this way, the structure of the three-way valve seat 1 and the valve sleeve 2 helps to simplify the structure and improve the ease of assembly and stability.

[0053] A first sealing structure 7 is provided between the valve sleeve 2 and the three-way valve seat 1. The first sealing structure 7 is arranged around the outer periphery of the valve core 3 to achieve a seal between the three-way valve seat 1 and the valve body 101, thereby preventing gas from the intake channel 11 from leaking out through the gap between the valve sleeve 2 and the three-way valve seat 1. Specifically, the first sealing structure 7 includes at least one sealing ring. The inner wall of the valve sleeve 2 has an annular stepped surface that abuts against the port of the side opening 12 of the three-way valve seat 1. A sealing groove is provided on the end face of the side opening 12. The sealing ring of the first sealing structure 7 is disposed in the sealing groove and abuts against the stepped surface between the three-way valve seat 1 and the valve sleeve 2.

[0054] A second sealing structure 8 is provided between the valve sleeve 2 and the valve core 3. The second sealing structure 8 is arranged around the outer periphery of the valve core 3 to achieve a seal between the valve core 3 and the valve body 101, thereby preventing gas from the intake channel 11 from leaking out through the gap between the valve sleeve 2 and the valve core 3. Specifically, the second sealing structure 8 includes at least one sealing ring. A sealing groove is provided on the outer peripheral surface of the valve core 3, and the sealing ring of the second sealing structure 8 is disposed in the sealing groove and abuts against the inner wall between the valve core 3 and the valve sleeve 2. Here, the second sealing structure 8 has two sealing rings arranged axially, which further improves the sealing strength around the valve core 3.

[0055] The valve core 3 has a core portion 31 and a plate portion 32. The core portion 31 is located inside the valve sleeve 2 and is slidably connected to the inner wall of the valve sleeve 2. The plate portion 32 is located inside the side opening 12 of the three-way valve seat 1 and is slidably engaged with the inner wall of the side opening 12. The core portion 31 and the plate portion 32 are connected by a rod portion 33. When the rod portion 33 is inside the valve sleeve 2, the plate portion 32 extends out of the suction channel 11. When the rod portion 33 is inside the side opening 12 of the three-way valve seat 1, the plate portion 32 extends into the suction channel 11. In this way, the plate portion 32 can extend into and out of the suction channel 11, which can change the flow area of ​​the suction channel 11 and has a better adjustment effect.

[0056] It is understandable that the internal shape of the side port 12 of the three-way valve seat 1 is consistent with the shape of the plate portion 32 of the valve core 3. That is, the inside of the side port 12 forms a rectangular groove for the plate portion 32 to slide. The rectangular groove in the plate portion 32 of the valve core 3 and the side port 12 of the three-way valve seat 1 forms the above-mentioned guide structure to restrict the rotation of the valve core 3 relative to the valve body 101.

[0057] In the specific design, the plate portion 32 of the valve core 3 is perpendicular to the flow direction of the intake channel 11, so that the plate portion 32 of the valve core 3 can change the flow area of ​​the intake channel 11 to the greatest extent, which is conducive to reducing the stroke of the valve core 3 relative to the valve body 101 and reducing the volume of the valve structure.

[0058] In the first embodiment, the drive structure 102 is pneumatically configured, including a high-pressure interface 21 and a first elastic element 4. The high-pressure interface 21 is disposed on the valve body 101 and located on one side of the valve core 3. Here, the high-pressure interface 21 is positioned on the side of the valve core 3 away from the suction channel 11. In use, the high-pressure interface 21 is connected to the exhaust port of the compressor 40, and the high pressure from the exhaust port is introduced into the high-pressure interface 21, so that there is high pressure on the side of the valve core 3 away from the suction channel 11. The high pressure drives the valve core 3 to move relative to the valve body 101 in a direction toward the suction channel 11, so that the valve core 3 extends into the suction channel 11. The first elastic element 4 is disposed between the valve core 3 and the valve body 101. For example, the first elastic element 4 is configured as a compression spring. Through the elastic restoring force of the first elastic element 4, the valve core 3 is driven to move relative to the valve body 101 in a direction away from the suction channel 11, so that the valve core 3 extends out of the suction channel 11. In this way, the pressure of the high-pressure interface 21 can be adjusted by controlling the air pressure between the high-pressure interface 21 and the exhaust port of the compressor 40. When the pressure inside the high-pressure port 21 is greater than the elastic force of the first elastic element 4, the valve core 3 extends into the suction channel 11; when the pressure inside the high-pressure port 21 is less than the elastic force of the first elastic element 4, the valve core 3 extends out of the suction channel 11. In this way, by using the high-pressure exhaust from the compressor 40 to drive the valve core to move relative to the valve body 101, power loss can be reduced, energy consumption can be saved, and the structure is simple with stable and reliable operation.

[0059] A sliding channel 22 is provided inside the valve body 101. The first end of the sliding channel 22 is connected to the high-pressure interface 21, and the second end is connected to the intake channel 11. Considering that the valve body 101 has a three-way valve seat 1 and a valve sleeve 2, the sliding channel 22 is set as the inner hole of the sliding sleeve and is connected to the intake channel 11 through the side port 12 of the three-way valve seat 1. The valve core 3 includes a core portion 31 and a plate portion 32. The core portion 31 and the plate portion 32 are connected by a rod portion 33. The core portion 31 is slidably engaged with the sliding channel 22. A first elastic element 4 is disposed between the core portion 31 and the second end of the sliding channel 22 and can drive the core portion 31 to move to the first end of the sliding channel 22. Specifically, the dimensions of the side port 12 and the high-pressure port 21 of the three-way valve seat 1 are both smaller than the dimensions of the sliding channel 22, and stepped surfaces are formed at both ends of the sliding channel 22 to define the position of the core 31 at both ends of the sliding channel 22. When the core 31 is at the first end of the sliding channel 22, the rod 33 extends out from the side port 12, and the plate 32 extends out from the suction channel 11. When the core 31 is at the second end of the sliding channel 22, the rod 33 extends into the side port 12, and the plate 32 extends into the suction channel 11. The first elastic element 4 is set as a compression spring and sleeved on the outer periphery of the rod 33, with one end abutting against the core 31 and the other end abutting against the end face of the side port 12.

[0060] A third sealing structure 9 is provided between the core 31 and the valve body 101. The third sealing structure 9 is located on the end face of the core 31 near the high-pressure interface 21 and surrounds the outer periphery of the high-pressure interface 21. When the high-pressure interface 21 is not supplied with high pressure, the first elastic element 4 drives the core 31 to abut against the first end of the sliding channel 22. Under the action of the third sealing structure 9, the connection between the sliding channel 22 and the high-pressure interface 21 can be blocked, thereby isolating the intake channel 11 and the high-pressure interface 21. For example, the third sealing structure 9 can be provided with a sealing ring, and a sealing groove can be provided on the end face of the core 31 near the high-pressure interface 21. The sealing ring of the third sealing structure 9 is located in the sealing groove and abuts against the valve body 101.

[0061] A fourth sealing structure is provided between the core 31 and the sidewall of the sliding channel 22. The fourth sealing structure is arranged around the outer periphery of the core 31 to achieve a seal between the core 31 and the valve body 101, thereby preventing gas from the intake channel 11 from leaking out through the gap between the valve sleeve 2 and the core. Here, the fourth sealing structure is the second sealing structure 8 mentioned above.

[0062] The core 31 is provided with a pressure relief channel 34. The first end of the pressure relief channel 34 is located between the second sealing structure 8 and the third sealing structure 9, and the second end of the pressure relief channel 34 is located on the side of the second sealing structure 8 away from the third sealing structure 9. When the drive structure 102 is in the first state, the high pressure in the high-pressure interface 21 drives the core 31 closer to the second end of the sliding channel 22. At the same time, the plate 32 extends into the suction channel 11. The pressure relief channel 34 can connect the high-pressure interface 21 and the suction channel 11. Because the high pressure of the high-pressure interface 21 applies a large pressure to the core 31, the gas in the high-pressure interface 21 does not affect the position of the core when it passes through the pressure relief channel 34 on the core 31, so that the core 31 is kept at the second end of the sliding channel 22. When the drive structure 102 is in the second state, the high-pressure interface 21 is connected to the exhaust port of the compressor 40. The high-pressure interface 21 still has high air pressure. The high air pressure in the high-pressure channel can flow to the suction channel 11 through the pressure relief channel 34, so that the pressure on both sides of the core 31 is balanced. This allows the first elastic element 4 to drive the core 31 to move to the first end of the sliding channel 22, and seal it through the third sealing structure 9. In this way, the setting of the pressure relief channel 34 can improve the stability and reliability of the valve core 3's movement relative to the valve body 101.

[0063] Specifically, the first end of the pressure relief channel 34 is located on the end face of the core 31 near the high-pressure interface 21, and the second end of the pressure relief channel 34 is located on the end face of the core 31 away from the high-pressure interface 21, so that the pressure relief channel 34 penetrates through the core 31, which facilitates processing and ensures structural stability. The first end of the pressure relief channel 34 is outside the third sealing structure 9. When the core 31 is at the first end of the sliding channel 22, the third sealing structure 9 can block the connection between the pressure relief channel 34 and the high-pressure channel, ensuring the isolation between the intake channel 11 and the high-pressure interface 21.

[0064] In the second embodiment, the drive structure 102 is electrically powered, including an electromagnetic component 6 and a second elastic element 5. The electromagnetic component 6 includes a first magnetic pole 61 and a second magnetic pole 62. The first magnetic pole 61 is disposed on the valve core 3, and the second magnetic pole 62 is disposed on the valve body 101. When the electromagnetic component 6 is energized, the first magnetic pole 61 and the second magnetic pole 62 move closer together. For example, the first magnetic pole 61 can be a fixed iron core, and the second magnetic pole 62 a moving iron core. When the electromagnetic coil 63 is energized, the moving iron core receives magnetic force and moves towards the fixed iron core. The second elastic element 5 is disposed between the valve core 3 and the valve body 101 and can move the first magnetic pole 61 and the second magnetic pole 62 away from each other. Thus, the electromagnetic component 6 and the second elastic element 5 exert opposite effects on the valve core 3, enabling bidirectional displacement of the valve core 3 relative to the valve body 101.

[0065] In this embodiment, the intake pressure regulating valve 10 can be configured as normally closed. The first magnetic pole 61, the second magnetic pole 62, and the second elastic element 5 are all located on the side of the valve core 3 away from the intake channel 11, and the second elastic element 5 is located between the first magnetic pole 61 and the second magnetic pole 62. When the electromagnetic component 6 is energized, the first magnetic pole 61 and the second magnetic pole 62 move closer together, the second elastic element 5 is compressed, and the valve core 3 extends out of the intake channel 11. When the electromagnetic component 6 is de-energized, the magnetic attraction between the first magnetic pole 61 and the second magnetic pole 62 disappears, the second elastic element 5 drives the first magnetic pole 61 and the second magnetic pole 62 away from each other, and the valve core 3 extends into the intake channel 11. At this time, the intake pressure regulating valve 10 is in the regulating state, thereby realizing rapid oil equalization between the compressors 40.

[0066] Alternatively, the intake pressure valve 10 can be configured as a normally open type, with the first magnetic pole 61, the second magnetic pole 62, and the second elastic element 5 all located on the side of the valve core 3 (which has a core portion 31, a plate portion 32, and a rod portion 33, here the core portion 31) near the intake channel 11, and the second elastic element 5 located between the first magnetic pole 61 and the second magnetic pole 62. When the electromagnetic component 6 is energized, the first magnetic pole 61 and the second magnetic pole 62 move closer together, the second elastic element 5 is compressed, and the valve core 3 extends into the intake channel 11; when the electromagnetic component 6 is de-energized, the magnetic attraction between the first magnetic pole 61 and the second magnetic pole 62 disappears, the second elastic element 5 drives the first magnetic pole 61 and the second magnetic pole 62 away from each other, and the valve core 3 extends out of the intake channel 11.

[0067] This application embodiment also provides a parallel compressor system 40, including compressor 40 and suction pressure regulating valve 10. Multiple compressors 40 are connected in parallel; for example, two, three, or four compressors 40 can be connected in parallel. The suction pressure regulating valve 10 is the same as in the above embodiment, installed at the suction port 401 of the compressor 40. For example, the suction pressure regulating valve 10 is installed between the suction port 401 of the compressor 40 and the suction pipeline, so that the suction port 401 of the compressor 40 is connected to the suction pipeline through the suction pressure regulating valve 10. Thus, by using this suction pressure regulating valve 10, real-time adjustment can be made according to different operating conditions or flow rates, thereby enabling the compressor 40 to achieve better pressure and oil equalization effects under various operating conditions. Furthermore, it eliminates the need for repeated disassembly and reassembly of pipelines for debugging, exhibiting better reliability and safety.

[0068] In some preferred embodiments, the compressor 40 parallel system also includes an oil level sensor 20 and a solenoid valve 30. The oil level sensor 20 is located inside the compressor 40 and is used to detect the oil level in the compressor 40. The suction pressure transformer 10 is pneumatically operated and has a high-pressure port 21. The high-pressure port 21 is connected to the exhaust port of the compressor 40 through the solenoid valve 30. The solenoid valve 30 is communicatively connected to the oil level sensor 20 to control the opening and closing of the solenoid valve 30 based on the sensing value of the oil level sensor 20.

[0069] When the oil level of compressor 40 is above the set oil level, oil level sensor 20 does not send an alarm signal. At this time, solenoid valve 30 is closed, and the discharge port of compressor 40 and the high-pressure port 21 of suction pressure transformer valve 10 are disconnected. Suction pressure transformer valve 10 does not regulate the suction pressure of compressor 40. When the oil level of one of the compressors 40 (i.e., lean compressor 40) is below the set oil level, oil level sensor 20 triggers an alarm signal. At this time, solenoid valve 30 opens after receiving the alarm signal from oil level sensor 20, and the discharge port of compressor 40 and the high-pressure port 21 of suction pressure transformer valve 10 are connected. Suction pressure transformer valve 10 regulates the suction pressure of compressor 40. At this time, the suction pressure of the lean compressor 40 with a low oil level decreases after being regulated by suction pressure transformer valve 10, and the pressure in the oil sump decreases. Under the action of pressure difference, another rich compressor 40 forces lubricating oil into the lean compressor 40 to achieve a rapid oil equalization effect. When the oil level in the lean compressor 40 returns to above the set oil level, the alarm signal from the oil level sensor 20 is canceled, the solenoid valve 30 closes, and the discharge port of the compressor 40 is disconnected from the high-pressure port 21 of the suction transformer valve 10. The compressor 40 then returns to its suction unregulated state. In this way, automatic oil equalization among the parallel compressors 40 can be achieved without shutting down the system, avoiding system load fluctuations.

[0070] In some preferred embodiments, the compressor 40 parallel system includes an oil level sensor 20, which is disposed within the compressor 40 and used to detect the oil level in the compressor 40. The suction pressure regulating valve 10 is electrically operated and has an electromagnetic component 6, which is communicatively connected to the oil level sensor 20 to control the on / off state of the electromagnetic component 6 based on the sensing value of the oil level sensor 20. Here, the suction pressure regulating valve 10 is configured as normally closed, and will be described accordingly.

[0071] When the oil level of compressor 40 is above the set oil level, the oil level sensor 20 does not send an alarm signal. At this time, the electromagnetic component 6 remains energized, the valve core 3 is outside the suction channel 11, and the suction pressure regulating valve 10 does not regulate the suction pressure of compressor 40. When the oil level of one of the compressors 40 (i.e., the lean oil compressor 40) is below the set oil level, the oil level sensor 20 triggers an alarm signal. At this time, the electromagnetic component 6 loses power after receiving the alarm signal from the oil level sensor 20, and the second elastic element 5 drives the valve core 3 to extend into the suction channel 11. The suction pressure regulating valve 10 then regulates the suction pressure of that compressor 40. At this time, the suction pressure of the lean oil compressor 40 with the low oil level decreases after being regulated by the suction pressure regulating valve 10, and the pressure in the oil sump decreases. Under the action of the pressure difference, another rich oil compressor 40 forces lubricating oil into the lean oil compressor 40 to achieve a rapid oil equalization effect between the compressors 40. When the oil level in the lean compressor 40 returns to above the set oil level, the alarm signal from the oil level sensor 20 is canceled, the electromagnetic component 6 is energized, and the compressor 40 returns to its suction unadjusted state. In this way, automatic oil equalization among the parallel compressors 40 can be achieved without shutting down the system, avoiding system load fluctuations.

[0072] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0073] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0074] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0075] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0076] It should be understood that the qualifying terms “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0077] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An intake pressure regulating valve (10), characterized in that, include: The valve body (101) has an intake passage (11) for connecting the intake port (401) of the compressor (40); The valve core (3) is disposed inside the valve body (101) and can extend into and out of the suction channel (11) to change the flow area of ​​the suction channel (11); A drive structure (102) is disposed between the valve body (101) and the valve core (3). When the drive structure (102) is in a first state, the valve core (3) extends into the air intake channel (11). When the drive structure (102) is in a second state, the valve core (3) extends out of the air intake channel (11).

2. The intake pressure regulating valve (10) according to claim 1, characterized in that, The valve body (101) includes: The three-way valve seat (1) has two straight ports (13) and one side port (12), forming the intake passage (11) between the two straight ports (13); A valve sleeve (2) is fitted around the outer periphery of the valve core (3) and connected to the side port (12) of the three-way valve seat (1) so that the valve core (3) extends into and out of the suction channel (11) through the side port (12).

3. The intake pressure regulating valve (10) according to claim 2, characterized in that, A first sealing structure (7) is provided between the valve sleeve (2) and the three-way valve seat (1) surrounding the valve core (3); A second sealing structure (8) is provided between the valve sleeve (2) and the valve core (3) and surrounds the valve core (3).

4. The intake pressure regulating valve (10) according to claim 1, characterized in that, The valve core (3) has a plate (32) that can extend into and out of the intake channel (11) to change the flow area of ​​the intake channel (11).

5. The intake pressure regulating valve (10) according to claim 4, characterized in that, The plate portion (32) is perpendicular to the flow direction of the air intake channel (11).

6. The intake pressure regulating valve (10) according to any one of claims 1-5, characterized in that, The driving structure (102) includes: A high-pressure interface (21) is provided on the valve body (101), connected to one side of the valve core (3), and used to connect to the exhaust port (402) of the compressor (40), so that the valve core (3) can be driven to extend into the suction channel (11 by the high pressure in the high-pressure interface (21); The first elastic element (4) is disposed between the valve core (3) and the valve body (101) and can drive the valve core (3) to extend out of the suction channel (11).

7. The intake pressure regulating valve (10) according to claim 6, characterized in that, The valve body (101) is provided with a sliding channel (22), the first end of the sliding channel (22) is connected to the high pressure interface (21), and the second end is connected to the suction channel (11); the valve core (3) has a core (31) that slides with the sliding channel (22), and the first elastic member (4) is located between the core (31) and the second end of the sliding channel (22), and can drive the core (31) to move to the first end of the sliding channel (22).

8. The intake pressure regulating valve (10) according to claim 7, characterized in that, A third sealing structure (9) is provided between the end face of the core (31) near the high-pressure interface (21) and the valve body (101) to surround the high-pressure interface (21), so that the valve core (3) can block the sliding channel (22) and the high-pressure interface (21) under the action of the first elastic member (4).

9. The intake pressure regulating valve (10) according to claim 8, characterized in that, A fourth sealing structure is provided between the core (31) and the sidewall of the sliding channel (22); The core (31) is provided with a pressure relief channel (34), the first end of the pressure relief channel (34) is located between the fourth sealing structure and the third sealing structure (9), and the second end is located on the side of the fourth sealing structure away from the third sealing structure (9), so as to release the high pressure of the high pressure interface (21) to the intake channel (11) when the drive structure (102) is in the second state.

10. The intake pressure regulating valve (10) according to claim 9, characterized in that, The first end of the pressure relief channel (34) is located on the end face of the core (31) near the high-pressure interface (21) and outside the third sealing structure (9); the second end of the pressure relief channel (34) is located on the end face of the core (31) away from the high-pressure interface (21).

11. The intake pressure regulating valve (10) according to any one of claims 1-5, characterized in that, The driving structure (102) includes: The electromagnetic component (6) has a first magnetic pole (61) and a second magnetic pole (62). The first magnetic pole (61) is disposed on the valve core (3), and the second magnetic pole (62) is disposed on the valve body (101). When the electromagnetic component (6) is energized, the first magnetic pole (61) and the second magnetic pole (62) are brought close together. The second elastic element (5) is disposed between the valve core (3) and the valve body (101) and can drive the first magnetic pole (61) and the second magnetic pole (62) away from each other; When the first magnetic pole (61) and the second magnetic pole (62) are close to or far apart, the valve core (3) extends into the intake channel (11).

12. The intake pressure regulating valve (10) according to claim 11, characterized in that, The first magnetic pole (61), the second magnetic pole (62) and the second elastic element (5) are all located on the side of the valve core (3) away from the air intake channel (11), and the second elastic element (5) is located between the first magnetic pole (61) and the second magnetic pole (62).

13. A parallel compressor system, characterized in that, It includes multiple compressors (40) connected in parallel, and the intake port (401) of each compressor (40) is connected to an intake pressure regulating valve (10) according to any one of claims 1-12.

14. The compressor parallel system according to claim 13, characterized in that, Includes an oil level sensor (20) and a solenoid valve (30), wherein the oil level sensor (20) is disposed on the compressor (40) and is used to detect the oil level of the compressor (40); The drive structure (102) has a high-pressure interface (21), which is connected to the exhaust port (402) of the compressor (40) through the solenoid valve (30). The solenoid valve (30) is communicatively connected to the oil level sensor (20) to control the opening and closing of the solenoid valve (30) according to the sensing value of the oil level sensor (20).

15. The compressor parallel system according to claim 13, characterized in that, Includes an oil level sensor (20), which is disposed on the compressor (40) and is used to detect the oil level of the compressor (40); The drive structure (102) has an electromagnetic component (6) which is communicatively connected to the oil level sensor (20) to control the on / off state of the electromagnetic component (6) according to the sensing value of the oil level sensor (20).

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