Gas-liquid separator
By designing a gas-liquid separator suitable for different refrigeration systems, and utilizing a copper wire mesh and a triangular opening structure, the problems of poor applicability and separation effect of existing gas-liquid separators were solved, achieving simple and effective gas-liquid separation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI BINDONG MECHANICAL & ELECTRICAL EQUIPMENT CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-15
AI Technical Summary
Existing gas-liquid separators have complex structures, making them difficult to apply to different refrigeration systems, and their separation effect is incomplete.
Design a gas-liquid separator including an intermediate separator, an upper filter, and a lower filter. The intermediate separator is filled with copper wire mesh. By changing the length and diameter of the separator, it can be adapted to different systems. Gas-liquid separation is achieved by using triangular openings and reverse filter orientation. The copper wire mesh is combined to improve the Reynolds number and thermal conductivity.
It achieves thorough and flexible gas-liquid separation, is applicable to systems of different sizes, reduces manufacturing costs, and improves separation efficiency and effectiveness.
Smart Images
Figure CN224246494U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration system equipment technology, specifically a gas-liquid separator. Background Technology
[0002] This gas-liquid separator is typically used in cascade cryogenic refrigeration systems, installed between the condenser and the evaporator. It ensures that the high-temperature stage capillary inlet contains liquid refrigerant and that the high-pressure side inlet of the evaporator contains gaseous refrigerant. It also stores a portion of the liquid refrigerant.
[0003] Current gas-liquid separators are typically integrated and fixedly designed for specific refrigeration systems. Their structural design is relatively complex, and separation is often incomplete. Different refrigeration systems require different types of gas-liquid separators to be installed in the equipment and ensure proper gas-liquid separation.
[0004] Therefore, there is a need for a gas-liquid separator that is simple in design and can be adapted to systems of different sizes by changing the length and diameter of the intermediate separator. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a gas-liquid separator, comprising:
[0006] An intermediate separator with a gas-liquid mixing inlet is filled with copper wire mesh, and the gas-liquid mixing inlet is located at the bottom of the intermediate separator;
[0007] An upper filter with a gas outlet is installed above an intermediate separator. The lower end of the upper filter is connected to the upper end of the intermediate separator, and the upper end is sealed with an upper cap.
[0008] A lower filter with a liquid outlet is located below the intermediate separator. The upper end of the lower filter is connected to the lower end of the intermediate separator, and the lower end is sealed with a lower end cap.
[0009] Furthermore, a gas-liquid mixing inlet pipe is provided at the location of the gas-liquid mixing inlet. One end of the gas-liquid mixing inlet pipe is embedded into the interior of the intermediate separator from the outside to the inside. Several gas-liquid mixing vent holes are symmetrically opened on both sides of the end surface of the gas-liquid mixing inlet pipe embedded in the intermediate separator.
[0010] Furthermore, the end of the gas-liquid mixing inlet pipe embedded inside the intermediate separator is flush with the inner wall of the intermediate separator, but a very small gap remains. (The size of this gap is determined by the curvature of the inner wall of the intermediate separator.)
[0011] Furthermore, a gas outlet pipe is provided at the location of the gas outlet, and one end of the gas outlet pipe is embedded into the interior of the upper filter from the outside to the inside.
[0012] Furthermore, the front end of the gas outlet pipe located inside the upper filter is provided with an inclined triangular first opening.
[0013] Furthermore, the first opening is located at the top of the inner cavity of the upper filter, and the first opening faces away from the flow direction of the gas inside the bottom of the upper filter.
[0014] Furthermore, a liquid outlet pipe is provided at the location of the liquid outlet, and one end of the liquid outlet pipe is embedded into the interior of the lower filter from the outside in.
[0015] Furthermore, the liquid outlet pipe has a second opening in an inclined triangular shape at its front end inside the lower filter.
[0016] Furthermore, a sedimentation zone for impurities is formed between the second opening and the bottom of the lower filter cavity, with the second opening facing away from the flow direction of the liquid inside the lower filter.
[0017] The advantages of this utility model compared with the prior art are as follows:
[0018] 1. Through the overall structure designed in this scheme, the gas-liquid mixture of refrigerant is separated into gas and liquid by an intermediate separator with a lower wall temperature. The gas enters the gas outlet pipe after passing through the upper filter, while the liquid and refrigeration oil enter the liquid outlet pipe after passing through the lower filter under the influence of gravity, thus realizing the gas-liquid separation of refrigerant. By superimposing the upper filter, intermediate separator and lower filter, the structure design is simple and easy to disassemble and assemble. By changing the length and pipe diameter of the intermediate separator, it can also be applied to systems of different sizes.
[0019] 2. This solution sets the first and second openings of the triangle opposite to the gas-liquid direction inside the filter, which can prevent unseparated gas or liquid from directly entering the gas outlet pipe or liquid outlet pipe, thus achieving a full separation effect.
[0020] 3. This solution improves the Reynolds number during the separation process of gas-liquid mixed refrigerant by using a copper wire mesh built into the intermediate separator. Furthermore, due to the good thermal conductivity of copper, the mixed refrigerant is cooled a second time, thereby improving the separation effect.
[0021] 4. This solution can control manufacturing costs and is suitable for different application scenarios by changing the materials of the lower filter, intermediate separator, and the internal filling material of the intermediate separator. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the gas-liquid separator proposed in this scheme;
[0023] Figure 2This is an exploded schematic diagram of the gas-liquid separator proposed in this scheme;
[0024] Figure 3 This is a schematic diagram of the intermediate separator proposed in this scheme;
[0025] Figure 4 This is a schematic diagram of the vertical cross-section of the intermediate separator proposed in this scheme;
[0026] Figure 5 This is a schematic diagram of the upper filter structure proposed in this solution;
[0027] Figure 6 This is a schematic diagram of the vertical cross-section of the upper filter proposed in this scheme;
[0028] Figure 7 This is a schematic diagram of the lower filter structure proposed in this scheme;
[0029] Figure 8 This is a structural schematic diagram of the vertical cross-section of the lower filter proposed in this scheme.
[0030] Reference numerals: 10, intermediate separator; 20, upper filter; 30, lower filter; 40, copper wire mesh; 50, upper end cover; 60, lower end cover;
[0031] 11. Gas-liquid mixing inlet; 12. Gas-liquid mixing inlet pipe; 13. Gas-liquid mixing vent;
[0032] 21. Gas outlet; 22. Gas outlet pipe; 23. First opening;
[0033] 31. Liquid outlet; 32. Liquid outlet pipe; 33. Second opening; 34. Sedimentation zone. Detailed Implementation
[0034] This embodiment provides a gas-liquid separator suitable for ultra-low temperature single-unit self-cascade refrigeration systems, as shown in the attached instruction manual. Figure 1-8 As shown, it includes an intermediate separator 10, an upper filter 20, and a lower filter 30, specifically:
[0035] The intermediate separator 10 has a gas-liquid mixing inlet 11, whose wall surface directly exchanges temperature with the surrounding environment. The system's main cryogenic return pipe can also be led to the outer wall surface of the intermediate separator for heat exchange. Therefore, the wall surface temperature is relatively low. The intermediate separator 10 is filled with copper wire mesh 40, which can increase the Reynolds number of the refrigerant and allow for sufficient heat exchange, resulting in more thorough gas-liquid separation. The gas-liquid mixing inlet 11 is located at the lower part of the intermediate separator 10, through which the gas-liquid mixed refrigerant enters. It is worth noting that by changing the length and pipe diameter of the intermediate separator 10, as well as the corresponding lengths and pipe diameters of the upper filter 20 and lower filter 30, it can adapt to systems of various sizes.
[0036] Furthermore, a gas-liquid mixing inlet pipe 12 is provided at the location of the gas-liquid mixing inlet 11. One end of the gas-liquid mixing inlet pipe 12 is embedded into the interior of the intermediate separator 10 from the outside in. Several gas-liquid mixing vent holes 13 are symmetrically opened on both sides of the end surface of the gas-liquid mixing inlet pipe 12 embedded in the intermediate separator 10. The gas-liquid mixing vent holes 13 face the inner wall surface of the intermediate separator 10. The gas-liquid mixed refrigerant enters through one end of the gas-liquid mixing inlet pipe 12 and enters the interior of the intermediate separator 10 along the gas-liquid mixing inlet pipe 12 and is sprayed out from the gas-liquid mixing vent holes 13. After being sprayed out from the gas-liquid mixing vent holes 13, the gas-liquid mixed refrigerant first contacts the relatively low temperature inner wall surface of the intermediate separator 10, and then moves along the intermediate separator 10. At this time, the high-boiling-point refrigerant in the gas-liquid mixed refrigerant will condense a second time to form a refrigerant subcooled liquid, while the mixed gas separates from the liquid. Therefore, the gas enters the upper filter 20 from bottom to top. Since the diameter of the upper filter 20 is larger than that of the intermediate separator 10, the small liquid droplets mixed in the rising gas will be decelerated and separated again. It is worth mentioning that the gas-liquid mixture of refrigerant is decelerated once in the intermediate separator 10. In addition, under the influence of gravity, the liquid and refrigeration oil enter the lower filter 30 from top to bottom, realizing gas-liquid separation.
[0037] To further explain, several gas-liquid mixing vent holes 13 are evenly distributed on both sides of the end of the gas-liquid mixing inlet pipe 12 embedded in the intermediate separator 10, so that the gas-liquid mixed refrigerant in the gas-liquid mixing inlet pipe 12 is sprayed out from the gas-liquid mixing vent holes 13 on both sides, instead of being evenly dispersed from all sides. The gas-liquid mixed refrigerant sprayed out from both sides flows along the intermediate separator 10 and undergoes secondary condensation through the copper wire mesh 40 to achieve gas-liquid separation. The gas is lighter and moves from bottom to top into the upper filter 20, while the liquid is heavier and collects into the lower filter 30 under the action of gravity.
[0038] Furthermore, both the first and second decelerations occur because: as small liquid droplets mixed in the gas rise or diffuse along with the gas, their movement speed is lower than that of the gas due to their own greater gravity, thus separating them from the gas.
[0039] It is worth mentioning that the end of the gas-liquid mixing inlet pipe 12 embedded inside the intermediate separator 10 is in contact with the inner wall of the intermediate separator 10, which improves the efficiency of the gas-liquid mixed refrigerant entering the intermediate separator 10 from the gas-liquid mixing inlet pipe 12, thereby improving the separation effect.
[0040] The upper filter 20 has a gas outlet 21, which is located above the intermediate separator 10. Its lower end is connected to the upper end of the intermediate separator 10. The gas-liquid mixture of refrigerant enters the upper filter 20 from the lower end after being separated by the intermediate separator 10. The upper end of the upper filter 20 is provided with an upper end cover 50 for sealing to ensure airtightness during use. The gas filtered by the upper filter 20 flows out from the gas outlet 21.
[0041] Furthermore, a gas outlet pipe 22 is provided at the location of the gas outlet 21. One end of the gas outlet pipe 22 is embedded in the interior of the upper filter 20 from the outside to the inside. Therefore, the gas flows out from the gas outlet pipe 22 after being filtered by the upper filter 20.
[0042] Furthermore, the gas outlet pipe 22 is provided with an inclined triangular first opening 23 at the front end of the end inside the upper filter 20. The first opening 23 is located at the top of the inner cavity of the upper filter 20 and faces away from the flow direction of the gas inside the bottom of the upper filter 20. In this embodiment, the first opening 23 faces upward. Since the gas moves from bottom to top in the upper filter 20, the first opening 23 increases the channel area for gas to enter the gas outlet pipe 22. At the same time, the first opening 23 is set in the opposite direction to the gas flow direction, so only the gas that has been filtered by the upper filter 20 and gathered at the top of the upper filter 20 will enter the gas outlet pipe 22 through the first opening 23, preventing residual small droplets from flowing from the first opening 23 to the gas outlet pipe 22.
[0043] The lower filter 30 has a liquid outlet 31. The lower filter 30 is located below the intermediate separator 10. The upper end of the lower filter 30 is connected to the upper end of the intermediate separator 10. The liquid after the gas-liquid mixture of refrigerant is separated by the intermediate separator 10 gathers downward under the action of gravity and flows to the outside through the liquid outlet 31. The lower end is provided with a lower end cover 60 for sealing to ensure the sealing effect of the lower filter 30.
[0044] Furthermore, a liquid outlet pipe 32 is provided at the location of the liquid outlet 31. One end of the liquid outlet pipe 32 is embedded into the interior of the lower filter 30 from the outside to the inside. The liquid after the gas-liquid mixture of refrigerant is separated by the intermediate separator 10 is collected in the lower filter 30 under the action of gravity and discharged to the outside through the liquid outlet pipe 32.
[0045] Furthermore, the liquid outlet pipe 32, located at the end inside the lower filter 30, has a second opening 33 in an inclined triangular shape. A sedimentation zone 34 for impurity deposition is formed between the second opening 33 and the bottom of the lower filter 30's inner cavity. The liquid separated by the intermediate separator 10 may contain impurities, which accumulate in the sedimentation zone 34 under gravity, preventing them from directly entering the second opening 33 and thus improving liquid purity. Simultaneously, this positions the second opening at the bottom of the oil-rich layer, facilitating system oil return. The second opening 33 faces away from the flow direction of the liquid inside the lower filter 30. After being separated by the intermediate separator 10, the liquid accumulates at the bottom of the lower filter 30 under gravity and then flows through the second opening 33 to the liquid outlet pipe 32, preventing impurities in the liquid from directly entering the second opening 33 under gravity.
[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0047] In the description of this utility model, 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0048] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A gas-liquid separator, characterized in that, include: An intermediate separator (10) having a gas-liquid mixing inlet (11) is filled with copper wire mesh (40), and the gas-liquid mixing inlet (11) is located at the lower part of the intermediate separator (10); An upper filter (20) with a gas outlet (21) is disposed above an intermediate separator (10). The lower end of the upper filter (20) is connected to the upper end of the intermediate separator (10), and the upper end is sealed with an upper end cap (50). A lower filter (30) with a liquid outlet (31) is disposed below the intermediate separator (10). The upper end of the lower filter (30) is connected to the lower end of the intermediate separator (10), and a lower end cap (60) is provided at the lower end for sealing.
2. The gas-liquid separator according to claim 1, characterized in that: A gas-liquid mixing inlet pipe (12) is provided at the location of the gas-liquid mixing inlet (11). One end of the gas-liquid mixing inlet pipe (12) is embedded into the interior of the intermediate separator (10) from the outside to the inside. Several gas-liquid mixing vent holes (13) are symmetrically opened on both sides of the end surface of the gas-liquid mixing inlet pipe (12) embedded in the intermediate separator (10).
3. A gas-liquid separator according to claim 2, characterized in that: The end of the gas-liquid mixing inlet pipe (12) embedded inside the intermediate separator (10) is in contact with the inner wall of the intermediate separator (10), but there is a gap.
4. A gas-liquid separator according to claim 1, characterized in that: A gas outlet pipe (22) is provided at the location of the gas outlet (21), and one end of the gas outlet pipe (22) is embedded in the interior of the upper filter (20) from the outside to the inside.
5. A gas-liquid separator according to claim 4, characterized in that: The gas outlet pipe (22) located inside the upper filter (20) has a first opening (23) in the shape of an inclined triangle at its front end.
6. A gas-liquid separator according to claim 5, characterized in that: The first opening (23) is located at the top of the inner cavity of the upper filter (20), and the first opening (23) faces away from the flow direction of the gas inside the bottom of the upper filter (20).
7. A gas-liquid separator according to claim 1, characterized in that: A liquid outlet pipe (32) is provided at the location of the liquid outlet (31), and one end of the liquid outlet pipe (32) is embedded in the interior of the lower filter (30) from the outside to the inside.
8. A gas-liquid separator according to claim 7, characterized in that: The liquid outlet pipe (32) located inside the lower filter (30) has a second opening (33) in the shape of an inclined triangle at its front end.
9. A gas-liquid separator according to claim 8, characterized in that: A sedimentation zone (34) for impurity precipitation is formed between the second opening (33) and the bottom of the inner cavity of the lower filter (30), and the second opening (33) faces away from the flow direction of the liquid inside the lower filter (30).