Oil and gas separation device and refrigeration cycle system

Abstract

The application discloses an oil-gas separation device and a refrigeration cycle system. The oil-gas separation device comprises a separator including a separation cavity; an input pipeline connected with the separation cavity and used for conveying an oil-gas mixture to the separation cavity; a separation filter screen arranged on the separator and used for being passed by the oil-gas mixture entering and leaving the separation cavity and separating the oil-gas mixture; an output port arranged on the separator and used for outputting the gas passing through the separation filter screen; and an adjusting device used for adjusting the flow rate of the oil-gas mixture passing through the separation filter screen.

Description

Technical Field

[0001] This invention relates to the field of refrigeration cycle system technology, and particularly to an oil-gas separation device and a refrigeration cycle system. Background Technology

[0002] Refrigeration cycle equipment is commonly used in modern society, such as various air conditioners and refrigerators. Influenced by outdoor weather conditions and indoor occupant activity patterns, building cooling / heating loads exhibit drastic fluctuations. For example, the required load may be as low as 10% at night, while the peak midday load may reach 100%. To address these challenges, some refrigeration cycle equipment needs to possess broad load adjustment capabilities and stable operating performance. Some refrigeration cycle equipment, such as water-cooled screw chillers, require refrigerant oil for cooling, lubrication, and sealing during compressor operation. Typically, an oil-gas separator is installed between the compressor and condenser to separate the refrigerant oil from the refrigerant vapor, preventing the refrigerant oil from participating in the system circulation. Simultaneously, the separated refrigerant oil is promptly delivered to the compressor to prevent compressor damage due to oil shortage.

[0003] Due to the significant load variations (10%-100%) in water-cooled screw compressor units, the compressor's discharge volume can differ by 2-3 times under different operating conditions. When the flow velocity of the oil-gas mixture discharged from the compressor is too high, oil droplets are directly "entrained" by the high-speed airflow and pass through the separator filter, resulting in a large amount of refrigerant oil failing to be separated smoothly. Simultaneously, the airflow will re-entrain already separated oil droplets, further increasing the difficulty of gas-liquid separation. Conversely, when the flow velocity is too low, the oil droplets are in a floating state as they pass through the separator filter, lacking sufficient impact force. They will pass directly through the separator filter with the low-speed airflow, resulting in poor oil-gas separation. Furthermore, the separated oil droplets easily form a stable oil film on the surface of the separator filter, preventing them from falling into the oil storage area in time, thus triggering the unit's oil shortage protection. Summary of the Invention

[0004] The purpose of this invention is to provide an oil-gas separation device that can improve the oil-gas separation effect of oil-gas mixtures.

[0005] The first aspect of this invention discloses an oil-gas separation device, comprising:

[0006] Separator, including separation chamber;

[0007] An input pipe is connected to the separation chamber and is used to deliver an oil-gas mixture into the separation chamber.

[0008] A separation filter screen is provided on the separator for passing through and separating the oil-gas mixture that enters and leaves the separation chamber;

[0009] An output port, located on the separator, is used to output the gas that has passed through the separation filter screen;

[0010] A regulating device is used to regulate the flow rate of the oil-gas mixture as it passes through the separation filter screen.

[0011] The oil-gas separation device in this embodiment can improve the oil-gas separation effect by adjusting the flow rate of the oil-gas mixture as it passes through the separation filter. For oil-gas mixtures with low flow rates, increasing the flow rate through the separation filter increases the impact force, reduces oil film formation, and improves the oil-gas separation efficiency. Alternatively, for oil-gas mixtures with high flow rates, decreasing the flow rate through the separation filter reduces the direct carryover of refrigeration oil by the airflow.

[0012] In some embodiments, the separator includes an input chamber located on one side of the separation filter screen, the oil-gas mixture entering the input chamber and then passing through the separation filter screen, the oil-gas separation device further includes one or more partition plates connected to the separation filter screen and the cavity wall of the input chamber, the one or more partition plates dividing the input chamber into multiple separation chambers, the input pipe including multiple input ports corresponding to the multiple separation chambers, and the regulating device for regulating the oil-gas mixture entering the input pipe to enter the input chamber from several of the multiple input ports.

[0013] This embodiment sets up multiple separation chambers and includes an adjustment device to regulate how many of the multiple inlets allow the oil-gas mixture to enter the input chambers. This allows the number of chambers to be adjusted based on the flow rate of the oil-gas mixture. For example, when the flow rate is high, the mixture can enter from multiple inlets, resulting in a larger space and cross-sectional area within the input chambers. This reduces the flow rate towards the filter screen, improving the oil-gas separation effect. Conversely, when the flow rate is low, the mixture can enter from fewer inlets, resulting in a smaller space and cross-sectional area within the input chambers. This increases the flow rate towards the filter screen, further enhancing the oil-gas separation effect.

[0014] In some embodiments, the input pipe includes a pipe inlet and a plurality of input sub-pipes connected between the pipe inlet and the input port, the plurality of input sub-pipes being connected one-to-one with the plurality of input ports, and the regulating device includes a control valve assembly disposed on the input pipe, the control valve assembly being used to control the number of input sub-pipes in a connected state among the plurality of input sub-pipes.

[0015] This embodiment employs a control method using parallel branch pipelines and control valve assemblies to achieve independent control of the gas supply to each separation chamber. The control method is simple, reliable, and responsive, facilitating automation by linking with flow meters and other detection elements. It allows for reliable regulation of the oil-gas mixture passing through the separation filter without adjusting the compressor frequency.

[0016] In some embodiments, the separator includes a vertical cylindrical body, and the oil-gas separation device further includes a baffle plate disposed at the bottom of the input cavity, the baffle plate having a plurality of oil passage holes, the separation filter being located above the baffle plate, the separation filter, the baffle plate and the cylindrical wall of the cylindrical body defining the input cavity, one end of the partition plate being inserted into the separation filter, and the other end of the partition plate penetrating the baffle plate.

[0017] In this embodiment, the baffle plate separates the oil-gas separation area from the oil storage area, preventing the flow of the oil-gas mixture above from disturbing the oil collected below. Simultaneously, the partition plate extends through the baffle plate, increasing the independence between each separation chamber and preventing the flow of the oil-gas mixture between them, thus ensuring the regulating device's effective control over the flow rate of the oil-gas mixture. The partition plate is securely installed, and the structure is reliable and effective.

[0018] In some embodiments, the plurality of partition plates uniformly divide the input cavity into a plurality of separate cavities.

[0019] The uniform partitioning in this embodiment ensures consistent flow and separation capabilities in each separation chamber, facilitating precise flow rate adjustment through simple on / off control. It offers high control accuracy and clear adjustment levels.

[0020] In some embodiments, the adjusting device includes an adjusting plate movable relative to the separator on the separator and a driving device for driving the adjusting plate. The adjusting device is configured to drive the adjusting plate to move relative to the separator via the driving device to adjust the size of the separation chamber.

[0021] In this embodiment, the size of the separation chamber is adjusted by driving the regulating plate relative to the separator through the driving device. This allows for adjustment of the flow area of ​​the oil-gas mixture entering the separation chamber, thus achieving stepless adjustment of the flow rate of the oil-gas mixture as it passes through the separation filter screen. The adjustment is smooth and effective.

[0022] In some embodiments, the separator includes an input chamber located on one side of the separation filter, the oil-gas mixture enters the input chamber and then passes through the separation filter, the oil-gas separation device includes one or more partition plates connected to the separation filter and the cavity wall of the input chamber, the one or more partition plates dividing the input chamber into a plurality of separation chambers, and at least one of the partition plates is the regulating plate.

[0023] In this embodiment, at least one of the separator plates is configured as a movable adjusting plate. By changing the position of the adjusting plate, the volume and corresponding flow area of ​​each separation chamber are altered, thereby regulating the flow rate of the oil-gas mixture as it passes through the separation filter. This achieves continuous stepless regulation of the flow rate of the oil-gas mixture as it passes through the separation filter, with high adjustment precision, no need for additional valve assemblies, a compact structure, and a stable and reliable adjustment process.

[0024] In some embodiments, the input cavity is a cylindrical cavity, the adjusting plate is hinged to the separator, and the hinge axis of the adjusting plate and the separator is coaxial with the cylindrical cavity.

[0025] This embodiment employs a coaxial hinge, ensuring that the movement trajectory of the adjusting plate is an arc around the central axis, perfectly matching the geometry of the cylindrical cavity. This ensures a consistent and effective seal between the adjusting plate and the cylinder wall during rotation, resulting in low resistance to movement. The adjusting plate rotates flexibly, provides reliable sealing, and is easily driven by a drive device, enabling smooth angle adjustments. This allows for continuous, stepless regulation of the flow rate of the oil-gas mixture as it passes through the separation filter.

[0026] In some embodiments, the separator includes a vertical cylindrical body, the input chamber is disposed within the cylindrical body, and the oil-gas separation device further includes a baffle plate disposed at the bottom of the input chamber, the baffle plate having a plurality of oil passage holes, the separation filter screen being located above the baffle plate, the separation filter screen, the baffle plate, and the cylindrical wall of the cylindrical body defining the input chamber, one end of the adjusting plate being slidably and sealingly connected to the separation filter screen, and the other end of the adjusting plate having a sliding groove, the two opposite groove walls of the sliding groove being located above and below the baffle plate respectively and being slidably and sealingly connected to the upper and lower surfaces of the baffle plate respectively.

[0027] This embodiment achieves dynamic sealing between the regulating plate, the separation filter screen, and the air-blocking oil-passing plate through a sliding sealing structure, ensuring the independence of each separation chamber. This prevents cross-flow of the oil-gas mixture while the regulating plate changes the flow area of ​​each separation chamber, ensuring reliable sealing, effectively preventing cross-flow of the oil-gas mixture, guaranteeing the effectiveness of regulation, smooth movement of the regulating plate, and a compact structure.

[0028] In some embodiments, the cylinder further includes a collection chamber located below the baffle plate and an output chamber located above the separator filter. The hinge axis of the adjusting plate, which is hinged to the separator, passes through the collection chamber and the output chamber. The end of the adjusting plate near the collection chamber is spaced apart from the bottom of the collection chamber. The output port is offset relative to the axis of the cylindrical cavity.

[0029] In this embodiment, the design of the hinge shaft passing through both the collection chamber and the output chamber allows the drive device to be located outside the cylinder, facilitating installation and maintenance. Simultaneously, the lower end of the adjustment plate maintains a distance from the bottom of the collection chamber, ensuring that the rotation of the adjustment plate does not interfere with the collection of oil droplets within the collection chamber. The offset setting of the output port prevents it from directly facing the center area of ​​the separator filter, ensuring unimpeded rotation of the hinge shaft. Through a reasonable chamber layout and offset output port design, oil-gas separation and refrigerant oil collection are optimized, resulting in a rational structural layout where each functional area does not interfere with the others.

[0030] A second aspect of the present invention discloses a refrigeration cycle system, comprising a circulating refrigerant and any of the aforementioned oil-gas separation devices, wherein the refrigerant flows from the input pipe into the oil-gas separation device and is subjected to oil-gas separation by the oil-gas separation device.

[0031] This embodiment applies an oil-gas separator capable of adjusting the flow rate of the oil-gas mixture through the separator filter to a refrigeration cycle system, ensuring effective oil-gas separation and stable oil return under various operating conditions. This helps prevent compressor damage due to oil shortage and eliminates the need for frequent compressor frequency adjustments to maintain oil return, reducing system energy consumption and operational instability, and improving the unit's economic efficiency and reliability.

[0032] Based on the oil-gas separation device of this embodiment, by adjusting the flow rate of the oil-gas mixture as it passes through the separation filter, the flow rate of the oil-gas mixture with a low flow rate can be increased to increase the impact force, reduce oil film formation, and improve the oil-gas separation effect. Alternatively, the flow rate of the oil-gas mixture with a high flow rate can be reduced as it passes through the separation filter to reduce the direct carrying away of refrigeration oil by the airflow, thereby improving the oil-gas separation effect. This improves the efficiency of the refrigeration cycle system, achieves energy-saving effects, and is thus an energy-saving refrigeration cycle device.

[0033] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0035] Figure 1 This is a schematic diagram of the refrigeration cycle system according to an embodiment of the present invention;

[0036] Figure 2 for Figure 1 The diagram shown is a schematic representation of the structure of the oil-gas separation device.

[0037] Figure 3 for Figure 2 A schematic cross-sectional view of the oil-gas separation device shown.

[0038] Figure 4 This is a cross-sectional view of an oil-gas separation device according to another embodiment of the present invention;

[0039] Figure 5 This is a cross-sectional structural schematic diagram of an oil-gas separation device according to another embodiment of the present invention;

[0040] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the oil-gas separation device along another direction. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0046] like Figures 1 to 6 As shown in the figure, this embodiment discloses an oil-gas separation device, which includes a separator 100, an input pipe 2, a separation filter screen 3, an output port 12, and a regulating device.

[0047] The separator 100 includes a separation chamber 111. An input pipe 2 is connected to the separation chamber 111 and is used to supply an oil-gas mixture to the separation chamber 111. Figure 1 As shown, in the refrigeration cycle system, the oil-gas separator is typically located between the compressor 400 and the condenser 200. The oil-gas mixture of refrigeration oil and refrigerant output from the compressor enters the inlet pipe 2 and is then transported to the separation chamber 111 through the inlet pipe 2. After entering the separation chamber 111, the oil-gas mixture impacts the chamber wall or other separation structures within the separation chamber 111 to achieve oil-gas separation. After a portion of the refrigeration oil is separated, the remaining oil-gas mixture continues to flow downstream.

[0048] A separation filter 3 is installed on the separator 100. The separation filter 3 is used for the oil-gas mixture entering and leaving the separation chamber 111 to pass through and for the separation of the oil-gas mixture. Figures 3 to 5 As shown, the separation filter screen is a perforated plate structure with multiple filter holes. The oil-gas mixture that enters the separation chamber 111 passes through the separation filter screen 3 after leaving the separation chamber 111. When the oil-gas mixture passes through the separation filter screen, it will collide with the separation filter screen to separate the oil and gas.

[0049] Output port 12 is located on separator 100 and is used to output the gas that has passed through separation filter screen 3. After the oil-gas mixture is separated by separation filter screen 3, the remaining gas (which may still contain a small amount of refrigeration oil and can still be called oil-gas mixture) is output downstream through output port 12, for example, into the downstream condenser 200 in the refrigeration cycle system.

[0050] The regulating device is used to adjust the flow rate of the oil-gas mixture as it passes through the separation filter screen 3. Existing oil-gas separation devices cannot regulate the flow rate of the oil-gas mixture as it passes through the separation filter screen 3. When a high-velocity oil-gas mixture enters the oil-gas separation device, it passes through the separation filter screen at a high velocity; conversely, when a low-velocity oil-gas mixture enters the oil-gas separation device, it passes through the separation filter screen at a low velocity. In this embodiment, the regulating device adjusts the flow rate of the oil-gas mixture as it passes through the separation filter screen 3. When a high-velocity oil-gas mixture enters the input pipe, the regulating device can be activated to reduce the flow rate before it passes through the separation filter screen; conversely, when a low-velocity oil-gas mixture enters the input pipe, the regulating device can be activated to increase the flow rate before it passes through the separation filter screen. If the regulating device is not activated, the oil-gas mixture will pass through the separation filter screen at a velocity without additional intervention.

[0051] In this embodiment, the oil-gas separation device can improve the oil-gas separation effect by adjusting the flow rate of the oil-gas mixture as it passes through the separation filter 3. For oil-gas mixtures with low flow rates, increasing the flow rate through the separation filter 3 increases the impact force, reduces oil film formation, and improves the oil-gas separation efficiency. Alternatively, for oil-gas mixtures with high flow rates, decreasing the flow rate through the separation filter 3 reduces the direct carryover of refrigeration oil by the airflow.

[0052] In some embodiments, such as Figure 3 and Figure 4As shown, the separator 100 includes an input chamber 11 located on one side of the separation filter 3. Specifically, in the embodiment shown, the input chamber 11 is located on one side of the end face of the separation filter 3. In the embodiment shown, the separation filter 3 is disc-shaped, and the input chamber 11 is located on one side of the axial direction of the separation filter 3. The oil-gas mixture enters the input chamber 11 and then passes through the separation filter 3. The oil-gas separation device also includes one or more partition plates 4 connected to the walls of the separation filter 3 and the input chamber 11, which divide the input chamber 11 into multiple separation chambers 111. Figure 3 The illustrated embodiment includes a partition plate 4 that divides the input cavity 11 into two separate cavities 111. In such a case... Figure 5 The illustrated embodiment includes two partition plates 4, which divide the input chamber 11 into four separation chambers 111. The input pipe 2 includes multiple input ports 21 connected one-to-one with each of the separation chambers 111; that is, each separation chamber 111 corresponds to one input port 21. When the oil-gas mixture from the input pipe 2 exits from one input port 21, it flows into one separation chamber 111; when it exits from two input ports 21, it flows into the two separation chambers 21 corresponding to those two input ports. An adjusting device is used to adjust the number of input ports 21 from which the oil-gas mixture enters the input chambers 11. The adjusting device adjusts the oil-gas mixture from the input pipe 2 to enter the input chamber 11 from one of the multiple input ports 21, i.e., into one separation chamber 111, or adjusts the oil-gas mixture from the input pipe 2 to enter the input chambers 11 from multiple input ports 21, i.e., into multiple separation chambers 111.

[0053] This embodiment sets up multiple separation chambers 111 and an adjustment device to regulate how many of the oil-gas mixture from the input pipe 2 enters the input chambers 11. This allows the number of chambers 111 to be adjusted based on the flow rate of the oil-gas mixture. For example, when the flow rate is high, the mixture can enter from multiple input ports 21, i.e., into multiple separation chambers 111, such as three or four. This results in a larger space within the input chambers 11 and a larger cross-sectional area of ​​the flow channel, thus reducing the flow rate towards the separation filter 3 and improving the oil-gas separation effect. Conversely, when the flow rate is low, the mixture can enter from fewer input ports 21, i.e., into fewer separation chambers 111, such as two or one. This results in a smaller space within the input chambers 11 and a smaller cross-sectional area of ​​the flow channel, thus increasing the flow rate towards the separation filter 3 and improving the oil-gas separation effect.

[0054] In some embodiments, the input pipe 2 includes a pipe inlet 22 and a plurality of input sub-pipes 23 connected between the pipe inlet 22 and the input port. The plurality of input sub-pipes 23 are connected one-to-one with a plurality of input ports 21. The regulating device includes a control valve assembly disposed on the input pipe 2, which is used to control the number of input sub-pipes 23 in a connected state. Figures 1 to 6 As shown, the input pipe 2 consists of a pipe inlet 22 and multiple input sub-pipes 23. The pipe inlet 22 is used to connect to the compressor exhaust port and receive the oil-gas mixture from the compressor. One end of each of the multiple input sub-pipes 23 is connected in parallel to the pipe inlet 22, and the other end is connected to a corresponding input port 21, i.e., each input sub-pipe 23 corresponds to one input port 21, and thus corresponds to one separation chamber 111. The regulating device is a control valve assembly, which in the embodiment shown includes an electric valve 24 installed on at least one input sub-pipe 23, and a flow meter 500 for detecting the flow rate of the oil-gas mixture output by the compressor is provided on the corresponding refrigeration cycle equipment. The control valve assembly controls the number of input sub-pipes 23 that are in a connected state by controlling the opening and closing of the electric valve 24. For example, an electric valve 24 is installed on one of the input sub-pipes 23. When the electric valve 24 is open, the input sub-pipe 23 is connected, and the corresponding oil-gas mixture enters a separation chamber 111 to participate in the operation; when the electric valve 24 is closed, the input sub-pipe 23 is disconnected, and the corresponding separation chamber 111 does not participate in the operation.

[0055] This embodiment employs a control method using parallel branch pipelines and control valve assemblies to achieve independent control of the gas supply to each separation chamber. The control method is simple, reliable, and responsive, facilitating automated control through linkage with flow meters and other detection elements. It allows for reliable regulation of the oil-gas mixture passing through the separation filter 3 without requiring adjustment of the compressor frequency.

[0056] In some embodiments, such as Figure 3 As shown, the separator 100 includes a vertical cylinder 110. The oil-gas separation device also includes a baffle plate 5 located at the bottom of the input chamber 11. The baffle plate 5 has multiple oil passage holes 51. The separation filter is located above the baffle plate 5. The separation filter 3, the baffle plate 5, and the cylinder wall of the cylinder 110 define the input chamber 11. One end of the partition plate 4 is inserted into the separation filter, and the other end of the partition plate 4 passes through the baffle plate 5.

[0057] The vertical cylinder 110, also known as the vertically arranged cylinder 110, has a separator filter 3 and an oil-blocking baffle plate 5 arranged sequentially from top to bottom inside the cylinder 110. The oil-blocking baffle plate 5 is horizontally positioned at the bottom of the input cavity 11, that is, at a certain distance below the separator filter 3. The oil-blocking baffle plate 5 has multiple oil passage holes 51 for the separated refrigerant oil to pass through and be collected downwards, for example, dripping into the collection cavity 13 below. The separator filter 3, the oil-blocking baffle plate 5, and the cylinder wall of the cylinder 110 together form the input cavity 11. The partition plate 4 is arranged vertically, with its upper end inserted into or through the separator filter 3, and its lower end through the oil-blocking baffle plate 5 and extending a certain distance below the oil-blocking baffle plate 5. The lower end of the partition plate 4 passes through the oil-blocking baffle plate 5 but does not completely close the oil passage holes 51, allowing oil droplets to still pass through the oil passage holes 51 of the oil-blocking baffle plate 5 and fall into the collection cavity 13.

[0058] In this embodiment, the baffle plate separates the oil-gas separation area from the oil storage area, preventing the flow of the oil-gas mixture above from disturbing the oil collected below. Simultaneously, the partition plate extends through the baffle plate, increasing the independence between each separation chamber and preventing the flow of the oil-gas mixture between them, thus ensuring the regulating device's effective control over the flow rate of the oil-gas mixture. The partition plate is securely installed, and the structure is reliable and effective.

[0059] In some embodiments, a plurality of partition plates 4 uniformly divide the input cavity 11 into a plurality of separation cavities 111. When a plurality of partition plates 4 are provided, as shown in the figure... Figure 5 and Figure 6 As shown, each partition plate 4 is evenly distributed along the circumference of the cylinder 110. For example, one partition plate divides the input cavity into two semi-circular separation cavities, and two partition plates arranged at 90° divide the input cavity into four fan-shaped separation cavities.

[0060] The uniform partitioning in this embodiment ensures consistent flow and separation capabilities in each separation chamber, facilitating precise flow rate adjustment through simple on / off control. It offers high control accuracy and clear adjustment levels.

[0061] In some embodiments, such as Figure 4As shown, the adjusting device includes an adjusting plate movable relative to the separator 100 and a driving device for driving the adjusting plate. The adjusting device is configured to drive the adjusting plate to move relative to the separator 100 via the driving device to adjust the size of the separation chamber 111. The driving device includes a motor, cylinder, etc. The movable nature of the adjusting plate relative to the separator includes translation and / or rotation relative to the separator. For example, driving the adjusting plate to rotate causes the size of the separation chamber to change. When adjusting the size of the separation chamber, the adjusting plate can act as the chamber wall. The movement of the adjusting plate relative to the separator adjusts the size of the separation chamber, thereby adjusting the flow area of ​​the flow channel when the oil-gas mixture enters the separation chamber, thus achieving the regulation of the flow rate of the oil-gas mixture as it passes through the separation filter screen.

[0062] In this embodiment, the driving device drives the adjusting plate to move relative to the separator 100 to adjust the size of the separation chamber 111. This allows for adjustment of the flow area of ​​the oil-gas mixture entering the separation chamber, thus achieving stepless adjustment of the flow rate of the oil-gas mixture as it passes through the separation filter screen. The adjustment is stable and effective.

[0063] In some embodiments, such as Figure 4 As shown, the separator 100 includes an input chamber 11 located on one side of the separation filter 3. The oil-gas mixture enters the input chamber 11 and then passes through the separation filter 3. The oil-gas separation device also includes one or more partition plates 4 connected to the separation filter 3 and the chamber walls of the input chamber 11. The partition plates 4 divide the input chamber 11 into multiple separation chambers 111. At least one partition plate 4 is an adjusting plate, meaning that one partition plate can be used as an adjusting plate. This partition plate 4 is movable relative to the separator 100, thereby adjusting the size of the separation chamber associated with the partition plate. Multiple partition plates 4 can also be used as adjusting plates, thereby allowing adjustment of the size of multiple separation chambers associated with these partition plates 4. Figure 4 In the illustrated embodiment, one partition plate is an adjusting plate, which divides the input cavity 11 into two separation cavities 111. The adjusting plate serves as the common wall of these two separation cavities 111, and its position is adjustable. Therefore, the size of the two separation cavities 111 can be changed according to the position of the adjusting plate. When the adjusting plate rotates to one side, the volume of the separation cavity 111 on that side decreases, and the corresponding flow area decreases; conversely, the volume of the separation cavity 111 on the other side increases, and the corresponding flow area increases. When the oil-gas mixture is located in a certain separation cavity, and it is necessary to adjust the size of that separation cavity, the adjusting plate can be rotated to increase or decrease the size of the separation cavity, thereby reducing the speed at which the oil-gas mixture passes through the separation filter 3 and increasing the speed at which the oil-gas mixture passes through the separation filter 3.

[0064] In this embodiment, at least one of the separator plates is configured as a movable adjusting plate. By changing the position of the adjusting plate, the volume and corresponding flow area of ​​each separation chamber are altered, thereby regulating the flow rate of the oil-gas mixture as it passes through the separation filter. This achieves continuous stepless regulation of the flow rate of the oil-gas mixture as it passes through the separation filter, with high adjustment precision, no need for additional valve assemblies, a compact structure, and a stable and reliable adjustment process.

[0065] In some embodiments, the input cavity 11 is a cylindrical cavity, the adjustment plate is hinged to the separator 100, and the hinge shaft 41 of the adjustment plate and the separator 100 is coaxial with the cylindrical cavity.

[0066] like Figure 4 As shown, the input cavity 11 inside the cylinder 110 is a cylindrical cavity. An adjusting plate is mounted on the separator 100 via a hinge shaft 41, which extends along the central axis of the cylindrical cavity, coinciding with the central axis of the cylindrical cavity. When the adjusting plate rotates around the hinge shaft 41, its position changes, thereby altering the volume and corresponding flow area of ​​the separation cavities 111 on both sides. The rotation angle of the adjusting plate is controlled by a drive device. In this embodiment, the adjusting plate serves as a shared cavity wall for the two separation cavities 111. When the adjusting plate rotates to one side around the hinge shaft 41, the volume of one separation cavity 111 decreases, and the cross-sectional area of ​​the oil-gas mixture flow channel on that side decreases; conversely, the volume of the other separation cavity 111 increases, and the cross-sectional area of ​​the oil-gas mixture flow channel on that side increases. This achieves regulation of the flow rate of the oil-gas mixture as it passes through the separation filter 3.

[0067] This embodiment employs a coaxial hinge, ensuring that the movement trajectory of the adjusting plate is an arc around the central axis, perfectly matching the geometry of the cylindrical cavity. This ensures a consistent and effective seal between the adjusting plate and the cylinder wall during rotation, resulting in low resistance to movement. The adjusting plate rotates flexibly, provides reliable sealing, and is easily driven by a drive device, enabling smooth angle adjustments. This allows for continuous, stepless regulation of the flow rate of the oil-gas mixture as it passes through the separation filter.

[0068] In some embodiments, the separator 100 includes a vertical cylindrical body 110, with an input chamber 11 disposed within the cylindrical body 110. The oil-gas separation device also includes a baffle plate 5 disposed at the bottom of the input chamber 11, with a plurality of oil passage holes 51 on the baffle plate 5. A separation filter screen is located above the baffle plate. The separation filter screen, the baffle plate 5, and the cylindrical wall of the cylindrical body 110 define the input chamber 11. One end of an adjusting plate is slidably and sealingly connected to the separation filter screen, and the other end of the adjusting plate is provided with a sliding groove 42. The two opposite groove walls of the sliding groove 42 are located above and below the baffle plate 5, respectively, and are slidably and sealingly connected to the upper and lower surfaces of the baffle plate 5, respectively. The upper end of the adjusting plate, i.e., the end near the separation filter screen 3, is connected to the separation filter screen 3 through a sliding sealing structure. For example, one end of the adjusting plate is provided with an elastic sealing strip, which slides and engages with the lower surface of the separation filter screen 3 to ensure that the adjusting plate always maintains a seal with the separation filter screen during rotation, preventing the oil-gas mixture from leaking from above the adjusting plate. At the lower end of the adjusting plate, near the end close to the air-blocking oil-passing plate 5, there is a sliding groove 42. The two opposite walls of the sliding groove 42 are located above and below the air-blocking oil-passing plate 5, respectively. Specifically, the upper wall of the sliding groove 42 is located on one side of the upper surface of the air-blocking oil-passing plate 5, and the lower wall is located on one side of the lower surface of the air-blocking oil-passing plate 5. The upper and lower walls slide and seal against the upper and lower surfaces of the air-blocking oil-passing plate 5, forming a wrap-around sliding seal. When the adjusting plate rotates around the hinge shaft 41, the sliding groove 42 slides along the surface of the air-blocking oil-passing plate 5, always maintaining a seal with the air-blocking oil-passing plate 5, preventing the oil-gas mixture from leaking from one separation chamber to another. In this embodiment, the position of the adjusting plate changes during rotation, altering the volume and flow area of ​​the two separation chambers 111. However, since the upper end of the adjusting plate is slidably sealed with the separation filter screen 3 and the lower end is slidably sealed with the air-blocking oil-passing plate 5 through the sliding groove 42, the separation chambers 111 remain relatively isolated. The oil-gas mixture will flow stably within its corresponding separation chamber 111 and will not cross-flow with each other.

[0069] This embodiment achieves dynamic sealing between the regulating plate, the separation filter screen, and the air-blocking oil-passing plate through a sliding sealing structure, ensuring the independence of each separation chamber. This prevents cross-flow of the oil-gas mixture while the regulating plate changes the flow area of ​​each separation chamber, ensuring reliable sealing, effectively preventing cross-flow of the oil-gas mixture, guaranteeing the effectiveness of regulation, smooth movement of the regulating plate, and a compact structure.

[0070] In some embodiments, the cylinder 110 further includes a collection chamber 13 located below the baffle plate 5 and an output chamber located above the separator filter. A hinge shaft 41, through which the adjusting plate is hinged to the separator 100, passes through the collection chamber 13 and the output chamber. The end of the adjusting plate near the collection chamber 13 is spaced from the bottom of the collection chamber 13, and the output port 12 is offset relative to the axis of the cylindrical cavity. Figure 4As shown, the cylinder 110 is arranged from top to bottom as follows: an output chamber (located above the separator filter 3), an input chamber 11 (located between the separator filter 3 and the oil baffle plate 5), and a collection chamber 13 (located below the oil baffle plate 5). The collection chamber 13 is used to collect the refrigerant oil separated from the oil-gas mixture and flowing down through the oil passage 51. An oil return port can be provided at the bottom of the collection chamber 13 to connect to an oil return pipe or other oil return equipment for returning the refrigerant oil to the compressor. The hinge shaft 41 of the adjusting plate is a long shaft that extends from the top or bottom of the cylinder 110 through the collection chamber 13 and the output chamber to the outside of the cylinder, facilitating connection to the drive unit. The hinge shaft 41 is sealed to the cylinder 110 by a seal to prevent leakage. The lower end of the adjusting plate (the end near the collection chamber 13) is spaced from the bottom of the collection chamber 13 to ensure that the rotation of the hinge shaft 41 is unimpeded, while not affecting the collection and discharge of oil droplets at the bottom of the collection chamber. The outlet 12 is located at the top of the cylinder 110, but its center position is offset relative to the central axis of the cylindrical cavity (i.e., not in the exact center position), so that gas can be output conveniently without affecting the rotation of the hinge shaft.

[0071] In this embodiment, when the adjusting plate rotates around the hinge shaft 41, the design of the hinge shaft 41 passing through the collection chamber 13 and the output chamber allows the drive device to be located outside the cylinder 110, facilitating installation and maintenance. Simultaneously, the lower end of the adjusting plate maintains a distance from the bottom of the collection chamber 13, ensuring that the rotation of the adjusting plate does not interfere with the oil droplet collection within the collection chamber 13. The offset setting of the output port 12 prevents the output port from directly facing the central area of ​​the separation filter screen 3, ensuring that the rotation of the hinge shaft 41 is unimpeded. Through a reasonable cavity layout and offset output port design, oil-gas separation and refrigerant oil collection are optimized, resulting in a rational structural layout where each functional area does not interfere with the others.

[0072] In some embodiments, a refrigeration cycle system is also disclosed, comprising a circulating refrigerant and any oil-gas separator, wherein the refrigerant flows from an inlet pipe 2 into the oil-gas separator and is subjected to oil-gas separation by the oil-gas separator. Figure 1As shown, the refrigeration cycle system includes components such as a compressor 400, an oil-gas separator, a condenser 200, an expansion valve, and an evaporator 300. The oil-gas separator is located between the discharge port of the compressor 400 and the condenser 200. During operation of the refrigeration cycle system, the oil-gas mixture of refrigerant oil discharged from the compressor 400 enters the separation chamber 111 of the oil-gas separator through the input pipe 2. After passing through inertial separation (impacting the cylinder wall and the oil baffle plate, etc.) and polymerization separation by the filtration effect of the separation filter screen 3, the separated refrigerant oil is deposited at the bottom of the collection chamber 13 and returned to the compressor 400 through the return oil pipe. The pure refrigerant is discharged from the output port 12 and enters the condenser 200 to participate in the subsequent refrigeration cycle. During the operation of the refrigeration cycle system, the regulating device of the oil-gas separator automatically adjusts the flow rate of the oil-gas mixture as it passes through the separation filter screen 3 according to the discharge volume or operating load of the compressor 400 (e.g., detected by a flow meter installed on the discharge pipe). When operating under high load, the flow velocity of the oil-gas mixture is relatively high. The regulating device drives the regulating plate to increase the volume of the effective separation chamber 111, that is, to increase the cross-sectional area of ​​the oil-gas mixture flow channel, thereby reducing the flow velocity of the oil-gas mixture when passing through the separation filter screen 3. When operating under low load, the flow velocity of the oil-gas mixture is relatively low. The regulating device drives the regulating plate to decrease the volume of the effective separation chamber 111, that is, to decrease the cross-sectional area of ​​the oil-gas mixture flow channel, thereby increasing the flow velocity of the oil-gas mixture when passing through the separation filter screen 3, so that the flow velocity is always within the optimal separation flow velocity range.

[0073] This embodiment applies an oil-gas separator capable of adjusting the flow rate of the oil-gas mixture through the separator filter to a refrigeration cycle system, ensuring effective oil-gas separation and stable oil return under various operating conditions. This helps prevent compressor damage due to oil shortage and eliminates the need for frequent compressor frequency adjustments to maintain oil return, reducing system energy consumption and operational instability, and improving the unit's economic efficiency and reliability.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. An oil-gas separation device, characterized in that, include: Separator (100) includes separation chamber (111); An input pipe (2) is connected to the separation chamber (111) for supplying an oil-gas mixture to the separation chamber (111); A separation filter (3) is provided on the separator (100) for passing through and separating the oil-gas mixture entering and leaving the separation chamber (111); The output port (12) is located on the separator (100) and is used to output the gas that has passed through the separation filter (3); A regulating device is used to regulate the flow rate of the oil-gas mixture as it passes through the separation filter (3).

2. The oil-gas separation device as described in claim 1, characterized in that, The separator (100) includes an input chamber (11) located on one side of the separation filter (3). The oil-gas mixture enters the input chamber (11) and then passes through the separation filter (3). The oil-gas separation device also includes one or more partition plates (4) connected to the cavity walls of the separation filter (3) and the input chamber (11). The one or more partition plates (4) divide the input chamber (11) into multiple separation chambers (111). The input pipe (2) includes multiple inlet ports (21) that are connected one-to-one with the multiple separation chambers (111). The regulating device is used to regulate the oil-gas mixture entering the input pipe (2) to enter the input chamber (11) from several of the multiple inlet ports (21).

3. The oil-gas separation device as described in claim 2, characterized in that, The input pipe (2) includes a pipe inlet (22) and a plurality of input sub-pipes (23) connected between the pipe inlet (22) and the plurality of input ports (21). The plurality of input sub-pipes (23) are connected to the plurality of input ports (21) in a one-to-one correspondence. The regulating device includes a control valve assembly disposed on the input pipe (2). The control valve assembly is used to control the number of input sub-pipes (23) in the connected state among the plurality of input sub-pipes (23).

4. The oil-gas separation device as described in claim 2, characterized in that, The separator (100) includes a vertical cylinder (110), and the oil-gas separation device also includes a baffle plate (5) located at the bottom of the input cavity (11). The baffle plate (5) has multiple oil passage holes (51). The separation filter (3) is located above the baffle plate (5). The separation filter (3), the baffle plate (5), and the cylinder wall of the cylinder (110) define the input cavity (11). One end of the partition plate (4) is inserted into the separation filter (3), and the other end of the partition plate (4) passes through the baffle plate (5).

5. The oil-gas separation device as described in any one of claims 2-4, characterized in that, The plurality of partition plates (4) uniformly divide the input cavity (11) into a plurality of separation cavities (111).

6. The oil-gas separation device as described in claim 1, characterized in that, The adjustment device includes an adjustment plate (4) movable relative to the separator (100) on the separator (100) and a drive device for driving the adjustment plate (4). The adjustment device is configured to drive the adjustment plate (4) to move relative to the separator (100) via the drive device to adjust the size of the separation chamber (111).

7. The oil-gas separation device as described in claim 6, characterized in that, The separator (100) includes an input chamber (11) located on one side of the separation filter (3), the oil-gas mixture enters the input chamber (11) and then passes through the separation filter (3), the oil-gas separation device includes one or more partition plates (4) connected to the cavity walls of the separation filter (3) and the input chamber (11), the one or more partition plates (4) divide the input chamber (11) into a plurality of separation chambers (111), at least one of the partition plates (4) is the regulating plate.

8. The oil-gas separation device as described in claim 7, characterized in that, The input cavity (11) is a cylindrical cavity. The adjustment plate (4) is hinged to the separator (100), and the hinge axis (41) of the adjustment plate (4) and the separator (100) is coaxial with the cylindrical cavity.

9. The oil-gas separation device as described in claim 8, characterized in that, The separator (100) includes a vertical cylinder (110), the input chamber (11) is located inside the cylinder (110), and the oil-gas separation device also includes a baffle plate (5) located at the bottom of the input chamber (11). The baffle plate (5) has multiple oil passage holes (51). The separation filter (3) is located above the baffle plate (5). The separation filter (3), the baffle plate (5) and the cylinder wall of the cylinder (110) define the input chamber (11). One end of the adjusting plate (4) is slidably and sealed to the separation filter (3). The other end of the adjusting plate (4) is provided with a sliding groove (42). The two opposite groove walls of the sliding groove (42) are located above and below the baffle plate (5) and are slidably and sealed to the upper and lower surfaces of the baffle plate (5).

10. The oil-gas separation device as described in claim 9, characterized in that, The cylinder (110) also includes a collection chamber (13) located below the baffle oil plate (5) and an output chamber located above the separation filter screen (3). The hinge shaft (41) of the adjusting plate (4) and the separator (100) passes through the collection chamber (13) and the output chamber. The end of the adjusting plate (4) near the collection chamber (13) is spaced from the bottom of the collection chamber (13). The output port (12) is offset relative to the axis of the cylindrical cavity.

11. A refrigeration cycle system, characterized in that, Includes a circulating refrigerant and an oil-gas separator as described in any one of claims 1 to 10, wherein the refrigerant flows into the oil-gas separator from the input pipe (2) and is separated into oil and gas by the oil-gas separator.

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