Oil separator and refrigerant system
By setting up a filter adsorption device in the oil separator, the filter element is used to adsorb the acidic substances in the refrigerant, the corrosive problem caused by the decomposition of trifluoroiodomethyl ethane is solved, and the safety and stability of the refrigerant system are improved.
Patent Information
- Application Number
- CN202311848815.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-07-01
Smart Images
Figure CN120232200A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of refrigeration systems, and particularly relates to an oil separator and a refrigerant system. Background Art
[0002] At present, the problem of extreme climate is being paid more and more attention globally, and protecting the ozone layer has become the primary consideration in the refrigeration industry. Among them, trifluoroiodomethane (CF3I) has an extremely low global warming potential value and zero ozone depletion potential, and is regarded as a new alternative product by the refrigerant industry.
[0003] However, due to the low bond energy of the carbon-iodine bond in CF3I, the carbon-iodine bond is easily broken, resulting in poor thermal stability, easy decomposition and reaction to form inorganic acids and organic acids dissolved in the liquid refrigerant, and mostly existing in the oil return pipeline in the high-temperature area on the exhaust side of the compressor. If it flows into the system, it may cause corrosion problems and pose potential safety hazards to the system operation. Summary of the Invention
[0004] The present application provides an oil separator, which can adsorb acidic substances in the refrigerant by adding a filtering and adsorbing device, thereby greatly reducing the potential safety hazard problem caused by the refrigerant containing acidic substances flowing into the system.
[0005] The present invention provides an oil separator, which includes a body. The body includes an upper end cover, a main body part and a lower end cover. The upper end cover is fixedly connected to the main body part or is an integral structure, and the lower end cover is fixedly connected to the main body part. A filtering and adsorbing device is provided in the body, and at least part of the filtering and adsorbing device is installed in the lower end cover. The filtering and adsorbing device includes a filter element, and the filter element can adsorb acidic substances in the refrigerant;
[0006] Through the optimized design of the structure of the oil separator, the present invention sets a filtering and adsorbing device in the lower end cover. The filtering and adsorbing device includes a filter element, and the filter element can adsorb acidic substances in the refrigerant, thereby greatly reducing the potential safety hazard problem caused by the refrigerant containing acidic substances flowing into the system. Brief Description of the Drawings
[0007] Figure 1 is a schematic diagram of the oil separator in the first embodiment of the present application;
[0008] Figure 2 is Figure 1 an exploded view of the filtering and adsorbing device in
[0009] Figure 3 is Figure 1 a schematic diagram of the filtering and adsorbing device in
[0010] Figure 4 is Figure 2 a schematic diagram of the retaining net in
[0011] Figure 5 isFigure 2 Schematic diagram of the middle filter element body;
[0012] Figure 6 is Figure 1 Enlarged view of position A in the middle;
[0013] Figure 7 Schematic diagram of the oil separator in the second embodiment of the present application;
[0014] Figure 8 is Figure 7 Exploded view of the filtering and adsorbing device in the middle;
[0015] Figure 9 is Figure 8 Axial sectional view of the filtering and adsorbing device in the middle;
[0016] Figure 10 is Figure 8 Schematic diagram of the sleeve in the middle;
[0017] Figure 11 is Figure 7 Enlarged view of part B in the middle.
[0018] Figures 1-11 The descriptions of the reference numerals in the drawings are as follows:
[0019] 1 - body; 11 - upper body; 12 - middle body; 13 - lower body;
[0020] 2 - filtering and adsorbing device; 21 - retaining net; 21a - opening; 21b - perforation; 211 - outward flange; 22 - filter element body; 221 - recess; 23 - filter net; 231 - second protrusion; 24 - bracket; 241 - outward flange; 24a - opening; 25 - sleeve; 251 - annular boss;
[0021] 3 - inlet pipe
[0022] 4 - outlet pipe;
[0023] 5 - return pipe. Detailed implementation manners
[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.
[0025] Embodiment 1
[0026] Please refer to Figures 1-3 , Figure 1 Schematic diagram of the oil separator in the first embodiment of the present application; Figure 2 is Figure 1 Exploded view of the filtering and adsorbing device 2 in the middle; Figure 3 is Figure 1 Schematic diagram of the filtering and adsorbing device 2 in the middle.
[0027] The oil separator in this embodiment includes a body 1 with an inner cavity. The body 1 is of a split structure in Figure 1 which includes an upper end cover 11, a body part 12, and a lower end cover 13. The three are connected in sequence to form a closed body 1. The split setting is easy for processing and assembly. Of course, the body 1 can also be integrally provided or in other split settings. An inlet pipe 3 and an outlet pipe 4 are connected to the upper end of the body 1. The outlet pipe 4 extends into the interior of the body 1 and extends for a certain distance. The inlet pipe 3 extends into the body 1 and extends tangentially.
[0028] This oil separator is arranged in a refrigerant system. The gaseous refrigerant flowing out of the compressor of the refrigerant system enters the interior of the body 1 through the inlet pipe 3. Under the action of gravity and the centrifugal force of tangential flow, the liquid in the gaseous refrigerant will be separated from the gaseous refrigerant. The liquid will fall to the bottom of the body 1, and the gaseous refrigerant will float upward and enter and flow out from the port of the outlet pipe 4, thus completing the gas-liquid separation. Figure 1 In, the port of the outlet pipe 4 located inside the body 1 is lower than the port of the inlet pipe 3 located inside the body 1. This can prevent the gaseous refrigerant from flowing out from the port of the outlet pipe 4 without gas-liquid separation, and improve the gas-liquid separation effect.
[0029] It should be emphasized that in the embodiment of the present application, a filter adsorption device 2 for filtering acidic substances is provided at the lower end of the inner cavity of the body 1, and the filter adsorption device 2 is located below the inlet pipe 3 and the outlet pipe 4. The filter adsorption device 2 specifically includes a filter element. The filter element includes a filter element body 22. The filter element body 22 can include at least one of alumina, molecular sieve, and weakly basic anion exchange resin materials. Such materials can better achieve the effect of filtering acidic substances. Of course, other materials capable of filtering acidic substances can also be used to make the filter element body 22. In this embodiment, the filter element body 22 is an integral filter element body structure made of the above materials and is in the shape of Figure 2 the block shown.
[0030] With such a setting, when the gaseous refrigerant enters the body and undergoes gas-liquid separation, the acidic substances in the separated liquid can fall to the filter element body 22 of the filter adsorption device 2 located below, so that the acidic substances are filtered out by the filter element body 22. The refrigeration oil in the liquid can continue to flow to the bottom of the body 1 and then flow out from the oil return pipe 5 connected to the bottom.
[0031] In order to make the liquid flow through the filter element body 22 completely and improve the filtering effect, the projection of the filter adsorption device 2 on the cross-section of the body 1 can coincide with the cross-section of the body 1. The cross-section is the section perpendicular to the length direction of the body 1, Figure 1 and the up and down directions in are the length direction of the body 1.
[0032] In this embodiment, the filtration and adsorption device 2 for filtering acidic substances is arranged at the lower end of the device body 1, and has the following technical effects:
[0033] 1. The gaseous refrigerant discharged from the exhaust side of the compressor is high-pressure steam. The refrigerant is trifluoroiodomethane with an extremely low global warming potential value and zero ozone depletion. The bond energy of the carbon-iodine bond in trifluoroiodomethane is low and it is easily broken down in the high-temperature area. At the same time, hydrogen can be extracted from the compressor's refrigeration oil, and organic acids and inorganic acids can be decomposed. Therefore, the generation of acidic substances in the refrigerant system mainly occurs on the high-temperature side of the exhaust side of the compressor. In the liquid pipeline of the refrigerant system, the amount of acidic substances is actually very small, with a proportion less than or equal to 0.5%, and the acidic substances mainly exist in liquid form. Compared with the gaseous refrigerant, the acidic substances have good miscibility with the refrigeration oil. Therefore, the acidic substances are mainly dissolved in the refrigeration oil. In the refrigeration system, only the compressor requires refrigeration oil, and the oil separator is arranged on the exhaust side of the compressor. Therefore, different from the conventional scheme of setting acidic substance filtering materials in the dryer filter in the background technology, in this embodiment, the filtration and adsorption device 2 is arranged in the oil separator, which can adsorb most of the acidic substances, thus effectively improving the corrosion problem of the acidic substances to the system.
[0034] It should be noted that it is not limited here that the refrigerant must be trifluoroiodomethane. As long as it is a refrigerant system that can decompose and react to produce organic acids and inorganic acids, the scheme of this embodiment can be adopted.
[0035] 2. The inside of the oil separator is gaseous refrigerant. The inlet pipe 3 and the outlet pipe 4 of the oil separator are both located at the upper end of the device body 1, while the filtration and adsorption device 2 is arranged at the lower end of the oil separator and can be close to the bottom of the device body 1. Then, the sudden change of the space and the function of reducing the flow rate after the gaseous refrigerant enters from the inlet pipe 3 are not affected. That is, after adding the filtration and adsorption device 2 in this embodiment, the gas-liquid separation function of the oil separator remains unchanged.
[0036] 3. As described above, the inlet pipe 3 and the outlet pipe 4 are arranged at the upper end of the device body 1. The filtering material of the filtration and adsorption device 2 located at the lower end of the device body 1 can have enough time to adsorb the acidic substances inside the refrigeration oil, and the adsorbed pickled substances are not easily carried out by the movement of the gaseous refrigerant, thus ensuring the stability and safety of the adsorption.
[0037] 4. The working principle of the oil separator requires a certain distance between its upper and lower ends to achieve gas-liquid separation. In the embodiment of the present application, the filtration and adsorption device 2 is arranged at the lower end of the device body 1 of the oil separator, making use of the original space, which will not cause an increase in volume. Even if the volume increases, the volume increment is limited, and the cost can be controlled. Moreover, the oil separator of the old system can be replaced with a new type of oil separator equipped with the filtration and adsorption device 2, thus conveniently completing the transformation of the old system.
[0038] Further, as shown in Figure 2 , the filtering and adsorbing device 2 includes a bracket 24 and a filter element body 22. The bracket 24 is formed by a bottom wall and a cylindrical side wall extending upward along the edge of the bottom wall. The cylindrical side wall and the bottom wall can be an integral or a split structure. The cylindrical side wall and the bottom wall are provided with a plurality of openings 24a, and the openings 24a allow the refrigerant oil to flow out. Specifically, the filter element body 22 is installed inside the bracket 24. The bracket 24 can support and accommodate the filter element body 22 to stabilize the position of the filter element body 22. In this way, the bracket 24 is easy to connect with the device body 1, and then the filtering and adsorbing device 2 can be maintained at a position with a certain distance from the lowermost end (i.e., the bottom) of the device body 1, so as to generate a storage space for storing the refrigerant oil flowing out after being filtered by the filtering and adsorbing device 2. The bracket 24 is not limited to the structure with a plurality of circular openings 24a shown in Figure 2 . The bracket 24 is, for example, a grid-like structure, or is provided with several strip-shaped support bars, as long as it can support and position the filter element body 22. Of course, without setting the bracket 24, the filtering and adsorbing device 2 can also be directly supported on the bottom of the device body 1.
[0039] Figure 2 In
[0040] , a plurality of openings 24a are formed in both the cylindrical side wall and the bottom wall of the bracket 24, which facilitates the downward flow of the refrigerant oil seeping out from various positions of the filter element body 22 and is convenient for collecting the refrigerant oil.
[0040] In addition, as shown in Figure 2 , the filter element of the filtering and adsorbing device 2 further includes a filter net 23, and the filtering and adsorbing device 2 further includes a retaining net 21. The filter net 23 also includes a bottom wall and a cylindrical side wall extending upward along the edge of the bottom wall. The filter net 23 is formed into a shell shape with an open top by enclosing the bottom wall and the cylindrical side wall. The filter element body 22 is installed inside the filter net 23 to form a filter element. The filter net 23 is installed inside the bracket 24. The retaining net 21 is blocked at the opening position of the bracket 24. In this way, the retaining net 21 and the filter net 23 enclose a closed mesh shell. In this way, the retaining net 21 and the filter net 23 can filter out larger impurities separated from the gaseous refrigerant, so as to extend the service life of the filter element body 22 and prevent blocking the flow of the refrigerant oil back to the oil return pipe 5.
[0041] Please refer to Figure 3 , and in combination with Figure 4 、 5 for understanding. Figure 4 is Figure 2 a schematic diagram of the retaining net 21 in Figure 5 ; Figure 2 is
[0042] a schematic diagram of the filter element body 22 in Figure 4As shown, the middle part of the retaining net 21 is recessed downward to form a convex part 212 facing the filter element body 22. The top of the filter element body 22 is also recessed downward to form a concave part 221 with the notch facing the convex part 212. As Figure 3 shown, the convex part 212 of the assembled retaining net 21 can be embedded into the concave part 221 of the filter element body 22, which can increase the contact area between the refrigeration oil and the filter element body 22, thereby improving the filtering effect.
[0043] Please also see Figure 2 and, in combination with Figure 6 for understanding. Figure 6 It is Figure 1 the enlarged view of position A in
[0044] As Figure 2 shown, the opening edge of the bracket 24 has an outwardly extending flanging 241. When the top of the lower end cover 13 and the bottom of the body part 12 are assembled, the flanging 241 of the bracket 24 can be clamped simultaneously. In this way, the bracket 24 can be fixed reliably and simply. As Figure 6 shown, the inner surface of the top of the lower end cover 13 is provided with a step 131, and the bottom of the body part 12 presses the flanging 241 against the step 131 to achieve fixation. You can continue to combine Figure 3 , 4 for understanding. In this embodiment, the retaining net 21 includes a main net part 213. The middle part of the main net part 213 is recessed downward, and the edge of the main net part 213 extends upward to form a side wall 214. The edge of the top of the side wall 214 extends outward to form an outward flanging 211. The outward flanging 211 overlaps on the outward flanging 241 of the bracket 24. The above-mentioned body part 12 and the lower end cover 13 simultaneously clamp the outward flanging 211 of the retaining net 21 and the outward flanging 241 of the bracket 24 to fix the retaining net 21 and the bracket 24 simultaneously. In this way, the assembly is simpler and the assembly steps are fewer. Of course, the retaining net 21 and the bracket 24, as well as the filter adsorption device 2 and the body 1, can be fixed in other ways, such as being fastened by fasteners, press-fitted, etc.
[0045] Embodiment 2
[0046] Please refer to Figures 7-9 , Figure 7 which is the exploded view of the filter adsorption device 2 of the oil separator in the second embodiment of the present application; Figure 8 It is Figure 7 the axial sectional view of the filter adsorption device 2 in Figure 9 It is Figure 7 the schematic diagram of the sleeve 25 in Figure 9 It is Figure 8 the axial sectional view of the filter adsorption device in Figure 10 It is Figure 8 the schematic diagram of the sleeve in Figure 11 It is Figure 7 the enlarged view of part B in
[0047] This embodiment is basically the same as the first embodiment, except that the filter element body 22 in this embodiment is a bulk filter element body 22 structure, that is, a plurality of bulk filter element body 22 particles are filled into the inner cavity of the filter net 23. After being filled to a predetermined amount, the retaining net 21 is then sealed from the top against the top of the bulk filter element body 22.
[0048] At this time, the filtration and adsorption device 2 further includes a sleeve 25, and the sleeve 25 is connected to the bottom of the retaining net 21 and the bracket 24. As Figure 8 shown, a first protrusion 242 protrudes upward from the bottom of the bracket 24, and a second protrusion 231 correspondingly protrudes upward from the bottom of the retaining net 21. The second protrusion 231 overlaps on the first protrusion 242. Through holes corresponding to the positions are provided on both the first protrusion 242 and the second protrusion 231, and the retaining net 21 is also provided with a through hole 21b. An annular boss 251 is provided at the lower end of the sleeve 25. The sleeve 25 can pass upward through the through holes of the first protrusion 242 and the second protrusion 231. The annular boss 251 of the sleeve 25 abuts against the bottom of the first protrusion 242 to limit the sleeve 25 from moving upward further. The upper end of the sleeve 25 then passes through the through hole 21b of the retaining net 21. After passing through, the protruding part can be flared through a tooling, which is equivalent to riveting and pressing on the top of the retaining net 21, thereby restricting the sleeve 25 from moving downward. In this way, the sleeve 25 fixes the retaining net 21 and the bracket 24 and reliably presses the bulk filter element body 22 particles. Of course, the sleeve 25 may not be provided. The provision of the sleeve 25 makes the press-fitting of the particulate filter element body 22 more reliable.
[0049] The embodiment of the present application further provides a refrigerant system. The refrigerant system includes a compressor and an oil separator connected to the compressor. The oil separator is the oil separator described in any one of the above, and has the same technical effects as the above embodiments.
[0050] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims
1. An oil separator, characterized in that, It includes a body, the body includes an upper end cover, a body part and a lower end cover, the upper end cover is fixedly connected to the body part or is an integral structure, the lower end cover is fixedly connected to the body part, a filtering and adsorbing device is arranged in the body, at least part of the filtering and adsorbing device is installed in the lower end cover, the filtering and adsorbing device includes a filter element, and the filter element can adsorb acidic substances in the refrigerant.
2. The oil separator according to claim 1, characterized in that, The filtering and adsorbing device further includes a retaining net and a bracket, the filter element is installed inside the bracket, the filter element includes a filter element body and a filter net, the filter net covers the outer peripheral part of the filter element body, the filter net is installed inside the bracket, the retaining net and the bracket axially limit the filter element, and the retaining net is press-fitted with the bracket.
3. The oil separator according to claim 2, characterized in that, The bracket includes a housing structure with an open top, and the retaining net seals the opening.
4. The oil separator according to claim 3, characterized in that, The middle part of the retaining net has a convex part that is recessed downward to protrude toward the filter element, and the convex part is embedded in the filter element.
5. The oil separator according to claim 4, wherein, The opening position of the bracket has an outwardly extending flanging, and the flanging is limited between the top of the lower end cover and the bottom of the body part.
6. The oil separator according to claim 4, wherein The filtering and adsorbing device further includes a sleeve, and the sleeve connects the retaining net and the bottom of the bracket.
7. The oil separator according to claim 2, wherein, There is a distance between the bracket and the bottom of the body.
8. The oil separator according to claim 1, characterized in that, The filter element is an integral filter element structure or a bulk filter element structure.
9. The oil separator according to any one of claims 1-8, characterized in that, The filter element includes at least one of alumina, molecular sieve, and weakly basic anion exchange resin material.
10. A refrigerant system comprising a compressor and an oil separator connected to the compressor, characterized in that, The oil separator is the oil separator according to any one of claims 1-9.