Oil separation component, oil separator and air conditioning system

Abstract

The present application provides an oil separation component, an oil separator and an air conditioning system. The oil separation component includes a packing layer for separating oil and gas, and a heat exchange component disposed in the packing layer to perform heat exchange with the oil and gas. By arranging the heat exchange component in the packing layer of the oil separation component, the temperature of the oil and gas can be changed to improve the separation effect.

Description

Technical Field

[0001] This application belongs to the technical field of air conditioning systems, and particularly relates to an oil separation component, an oil separator, and an air conditioning system. Background Art

[0002] A large amount of lubricating oil is carried in the refrigerant discharged from the compressor outlet. If a large amount of this lubricating oil enters the condenser and evaporator, it will cause a reduction in the heat exchange efficiency of the condenser and evaporator, and insufficient oil return to the compressor, seriously affecting the life of the compressor. Therefore, an oil separator is installed in the air conditioning system.

[0003] The packed oil separator is widely used in large and medium-sized steam compression refrigeration cycle systems. The common packed oil separator only has the function of separating oil. A perforated stainless steel plate is used to fix the packing in the inner cavity of the oil separator housing. The lubricating oil carried in the gas flowing through the packing is filtered by the packing, and thus oil-gas separation is achieved. Only separation is achieved through the packing, and the separation efficiency is low.

[0004] There is also an external cooling water jacket to cool the packing and the refrigerant. However, it is found in practice that adding a cooling water jacket does not significantly improve the oil separation efficiency. The reason is that the cooling water jacket only exchanges heat with the outer layer packing of the packing chamber. The inner layer packing and the refrigerant flowing through the inner layer packing are far from the cooling water jacket, and the cooling water exchanges heat unevenly with the entire packing chamber, resulting in poor heat exchange effect.

[0005] The structure of the traditional oil separator is relatively simple and the function is relatively single. Although there are modifications to enable a single component of the oil separator to achieve two functions of heat exchange and oil separation at the same time, for example, the traditional shell-and-tube and flooded heat exchangers are modified, and a filter screen is added inside them to achieve the functions of oil separation and heat exchange at the same time. However, the current modification form is still relatively rough. Their heat exchange tubes are in the form of smooth tubes, and the refrigerant vapor exchanges heat with the smooth tubes, resulting in low heat exchange efficiency; and the contact between the tubes and the filter screen is poor, with a large contact thermal resistance and poor heat exchange effect. Summary of the Invention

[0006] Therefore, the technical problem to be solved by this application is to provide an oil separation component, an oil separator, and an air conditioning system that can improve the oil separation effect.

[0007] To solve the above problems, this application provides an oil separation component, including:

[0008] A packing layer for separating oil and gas;

[0009] A heat exchange component disposed in the packing layer and performing heat exchange with the oil and gas.

[0010] Optionally, the heat exchange component includes heat exchange tubes, and a plurality of the heat exchange tubes are uniformly distributed, and the heat exchange tubes penetrate through the packing layer.

[0011] Optionally, heat dissipation fins are provided on the outer wall of the heat exchange tube along the axial direction.

[0012] Optionally, the heat exchange assembly further includes a U-shaped elbow, and the heat exchange tubes are connected through the U-shaped elbow.

[0013] Optionally, the packing of the packing layer includes a mixture of stainless steel wires, metal chips and molten flux, or a mixture of stainless steel wires, ceramics and molten flux, or a mixture of stainless steel wires and molten flux; the packing is welded to the outer wall of the heat exchange tube.

[0014] Optionally, the oil separation assembly further includes a feed pipe, an oil discharge pipe and an exhaust pipe. The outlet of the feed pipe is arranged above the packing layer, and the inlets of the oil discharge pipe and the exhaust pipe are both arranged below the packing layer.

[0015] Optionally, the oil separation assembly further includes a support plate for supporting the heat exchange assembly. The support plate is provided with through holes; the inlet of the oil discharge pipe is arranged below the support plate, and the inlet of the exhaust pipe is arranged above the support plate.

[0016] According to another aspect of the present application, an oil separator is provided, which includes the oil separation assembly as described above.

[0017] Optionally, the oil separator includes a housing, and the oil separation assembly is arranged in the housing; the feed pipe is arranged at the top of the housing, and the exhaust pipe passes through the packing layer and extends out of the top of the housing.

[0018] Optionally, a sewage discharge port is provided at the bottom of the housing, and the inlet of the oil discharge pipe is arranged between the support plate and the sewage discharge port.

[0019] According to still another aspect of the present application, an air conditioning system is provided, which includes the oil separation assembly as described above or the oil separator as described above.

[0020] An oil separation assembly provided by the present application includes: a packing layer for separating oil and gas; a heat exchange assembly arranged in the packing layer and performing heat exchange with the oil and gas. By arranging the heat exchange assembly in the packing layer of the oil separation assembly, the temperature of the oil and gas can be changed to improve the separation effect. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the oil separator according to the embodiment of the present application;

[0022] Figure 2 It is for the embodiment of the present application Figure 1 View taken along line A-A;

[0023] Figure 3Top view of the support plate according to the embodiment of the present application;

[0024] Figure 4 Schematic perspective view of the heat exchange tube according to the embodiment of the present application.

[0025] The reference numerals are shown as:

[0026] 1, packing layer; 11, sewage outlet; 2, heat exchange tube; 21, U-shaped elbow; 22, coolant inlet; 23, coolant outlet; 24, heat dissipation fin; 3, feed pipe; 4, exhaust pipe; 5, housing; 6, return oil pipe; 7, support plate; 71, through hole. Detailed implementation manners

[0027] With reference to Figures 1 to 4 As shown, according to an embodiment of the present application, an oil separation assembly includes:

[0028] A packing layer 1 for separating oil and gas;

[0029] A heat exchange assembly disposed in the packing layer 1 and performing heat exchange with the oil and gas.

[0030] Setting a heat exchange assembly in the packing layer 1 can perform heat exchange treatment on the separated oil and gas; since the heat exchange assembly is disposed in the packing layer 1, the overall heat exchange efficiency is improved and the heat exchange effect is good.

[0031] In some embodiments, the heat exchange assembly includes heat exchange tubes 2, and a plurality of the heat exchange tubes 2 are uniformly distributed and the heat exchange tubes 2 penetrate through the packing layer 1.

[0032] Adopting the manner of a plurality of heat exchange tubes 2 penetrating through the packing layer 1 is convenient for installation and the heat exchange is uniform.

[0033] In some embodiments, heat dissipation fins 24 are provided on the outer wall of the heat exchange tube 2 along the axial direction.

[0034] Adding heat dissipation fins 24 on the outer wall of the heat exchange tube 2 improves the heat exchange efficiency; at the same time, the contact area between the heat exchange tube 2 and the packing layer 1 is increased, and the contact thermal resistance between the packing layer 1 and the heat exchange tube 2 is reduced.

[0035] In some embodiments, the packing of the packing layer 1 includes a mixture of stainless steel wires, metal chips and molten flux, or a mixture of stainless steel wires, ceramics and molten flux, or a mixture of stainless steel wires and molten flux; the packing is welded to the outer wall of the heat exchange tube 2.

[0036] The filtration effect and the energy exchange efficiency can be changed by changing the density of the packing and the flow rate of the refrigerant in the packing, so as to ensure the applicability and reliability of the system.

[0037] The packing layer 1 eliminates the need for large clamping plates and perforated stainless steel baffles, securing the packing to the heat exchange tubes and the exhaust pipe in the oil separation assembly using fusion welding. This allows for an integrated installation of the packing, heat exchange tubes, and exhaust pipe. This facilitates installation, simplifies the structure and process, reduces the number of parts, and reduces production costs.

[0038] In some embodiments, the heat exchange assembly further includes a U-shaped elbow 21 , and the heat exchange tubes 2 are connected via the U-shaped elbow 21 .

[0039] The heat exchange tubes 2 are connected via a U-shaped elbow 21 structure, wherein the heat exchange tubes 2 can be connected in sequence or in parallel or in a mixed series and parallel connection, all of which can achieve heat exchange of the oil and gas inside the packing layer 1 .

[0040] In some embodiments, the oil separation assembly further includes a feed pipe 3, an oil drain pipe and an exhaust pipe 4. The outlet of the feed pipe 3 is located above the packing layer 1, and the inlets of the oil drain pipe and the exhaust pipe 4 are both located below the packing layer 1.

[0041] The upper feeding method is adopted. After the material is separated by the packing layer 1, it is discharged from the bottom of the packing layer 1 through the oil drain pipe and the exhaust pipe 4 respectively.

[0042] In some embodiments, the oil separation assembly further includes a support plate 7 for supporting the heat exchange assembly, and the support plate 7 is provided with a through hole 71; the inlet of the oil drain pipe is provided below the support plate 7, and the inlet of the exhaust pipe 4 is provided above the support plate 7.

[0043] A support plate 7 is provided below the heat exchange assembly to support the heat exchange assembly. A through hole 71 is provided on the support plate 7 to facilitate the separated oil to flow below the support plate 7 and be discharged through the oil drain pipe.

[0044] According to another aspect of the present application, an oil separator is provided, comprising the oil separation assembly as described above.

[0045] The oil separator using the above-mentioned oil separation assembly simultaneously achieves oil-gas separation and fluid heat exchange. The refrigerant in the oil separator is cooled through heat exchange, improving oil separation efficiency. This reduces exhaust gas superheat, improving the performance of the air conditioning unit. Furthermore, the coolant temperature is raised through heat exchange, allowing for waste heat to be utilized.

[0046] In some embodiments, the oil separator includes a shell 5, and the oil separation component is arranged in the shell 5; the feed pipe 3 is arranged at the top of the shell 5, and the exhaust pipe 4 is passed through the packing layer 1 to pass through the top of the shell 5.

[0047] The exhaust pipe 4 directly passes through the top of the housing 5 from below the packing layer 1, and the separated oil and gas flow naturally and are respectively led out by using the different densities of the oil and gas.

[0048] In some embodiments, a sewage outlet 11 is provided at the bottom of the housing 5, and the inlet of the oil discharge pipe is arranged between the support plate 7 and the sewage outlet 11.

[0049] A sewage outlet 11 is provided at the bottom of the housing bottom for discharging impurities in the oil without affecting the discharge of impurities in the oil by the oil discharge pipe.

[0050] The following is a detailed description of this new type of oil separator structure.

[0051] The oil separator of the present application can simultaneously realize the functions of oil and gas separation and fluid heat exchange. By arranging heat exchange tubes 2 in the packed type oil separator, the functions of improving the oil separation effect and the heat exchange efficiency of the coolant in the tubes are realized.

[0052] The packing is welded to the heat exchange tube 2 and the exhaust pipe 4 by using the fusion welding technology, so that the packing is in contact with the heat exchange tube 2, reducing the contact thermal resistance between the packing and the heat exchange tube 2. At the same time, large-area clamping plates and perforated stainless steel baffles and other fixing devices for the packing are cancelled, and the packing is fixed to the heat exchange tube 2 and the exhaust pipe 4 by using the fusion welding technology, enabling integrated installation. The number of overall assembled parts is reduced without weakening the oil separation effect.

[0053] As Figure 1 shown, the oil separator mainly consists of a housing 5, an exhaust pipe 4, a feed pipe 3, a coolant inlet 22, a coolant outlet 23, packing, a sewage outlet 11, a return pipe 6, a U-shaped elbow 21, heat exchange tubes 2 and a support plate 7. The feed pipe 3 passes through the top of the housing 5 and is fixed by welding to the housing top.

[0054] A packing layer 1 is arranged in the housing 5, and the packing of the packing layer 1 is mainly a mixture of stainless steel wires, metal chips and a fusion flux, or a mixture of stainless steel wires, ceramics and a fusion flux, or a mixture of stainless steel wires and a fusion flux. The system can change the filtering effect and the energy exchange efficiency by changing the density of the packing and the flow rate of the refrigerant in the packing, ensuring the applicability and reliability of the system.

[0055] A plurality of mutually parallel heat exchange tubes 2 penetrate through the packing, and U-shaped elbows 21 are arranged at both ends of the heat exchange tubes 2. Each heat exchange tube 2 is sequentially connected or connected in parallel or connected in a series-parallel hybrid manner by U-shaped elbows 21, and preferably by welding.

[0056] The drain pipe penetrates through the packing layer 1 and the top of the housing 5, and is welded to the top of the housing 5 for fixation. The packing layer 1 is fixed to the exhaust pipe 4 and the heat exchange pipe 2 by fusion welding. The packing is fixed to the heat exchange pipe 2 by using the fusion welding technology, so as to achieve integration. The U-shaped elbow 21 below the heat exchange pipe 2 is placed on the support plate 7. The edge of the support plate 7 is directly fixed to the inner wall of the housing 5. A drain port 11 is provided at the bottom of the housing 5 for discharging impurities in the oil.

[0057] The columns distributed in a triangular shape around the bottom of the housing 5 are used to support and place the entire oil separator. Round holes are provided on the side wall of the housing 5 to facilitate the penetration of the heat exchange pipe 2, and the heat exchange pipe 2 is filled with coolant; during installation, the coolant inlet pipe and the coolant outlet pipe respectively penetrate out from this round hole position, and the inlet and outlet pipes of the coolant are tightly connected to the housing 5 by welding. The oil return pipe 6 is located below the support plate 7, and the oil return pipe 6 extending into the bottom of the housing 5 has a certain distance from the bottom of the housing 5 in the vertical direction, avoiding sucking impurities located at the bottom of the housing 5 during oil return.

[0058] The through holes 71 opened on the support plate 7 include uniform or non-uniform holes, the shape of the holes is not limited to a rectangle, and the number is only for example.

[0059] The superheat degree of the exhaust gas in this application is reduced, and the working performance of the air conditioning unit can be improved. Moreover, the coolant is heated through heat exchange, and the waste heat can be utilized.

[0060] By means of the built-in straight fin heat exchange pipe 2, the contact area between the fluid inside the pipe, the packing outside the pipe and the refrigerant is increased, the heat exchange efficiency is improved, and under the requirement of the same heat exchange amount, the total length of the pipe is relatively reduced compared with that of a smooth pipe, saving the production cost.

[0061] The mixture of stainless steel wires and metal chips in the packing is welded to the straight fin heat exchange pipe 2 by using the fusion welding technology with a fusion flux, so that the packing and the straight fin heat exchange pipe 2 are integrated, the contact thermal resistance between the packing and the straight fin heat exchange pipe 2 is reduced, and the heat exchange efficiency is improved.

[0062] The packing layer 1 cancels fixing devices such as large-area clamping plates and perforated stainless steel baffles, and the packing is fixed to the straight fin heat exchange pipe 2 and the exhaust pipe 4 by using the fusion welding technology. During installation, the integrated device of the packing, the exhaust pipe 4 and the straight fin heat exchange pipe 2 is directly placed into the inner cavity of the heat exchange oil separator, the upper exhaust pipe 4 is welded and fixed to the top of the housing, and the lower heat exchange pipe 2 is placed on the perforated support plate 7. The packing, the U-shaped straight fin heat exchange pipe 2 and the exhaust pipe 4 can be integrally installed. The installation method is convenient, the structure is simple, the process is simple, the number of parts is reduced, and the production cost is saved.

[0063] According to another aspect of this application, an air conditioning system is provided, including the oil separation assembly as described above or the oil separator as described above.

[0064] When the air-conditioning system is in operation, the high-temperature and high-pressure refrigerant vapor discharged from the compressor carries lubricating oil and enters the oil separator through the feed pipe 3. Through the filtering action of the packing layer 1, the lubricating oil is intercepted and flows into the bottom of the shell through the holes in the supporting plate 7 below to achieve oil collection. The collected lubricating oil flows into the compressor from the oil return pipe 6 when needed. The gas changes direction after passing through the packing and flows out through the exhaust pipe 4.

[0065] The coolant (which can be water or other media) enters from the coolant inlet 22 and flows in the straight fin heat exchange tube 2 and the U-shaped elbow 21 in the direction countercurrent to the refrigerant gas, and finally flows out from the coolant outlet 23. By arranging the packing, a place for heat and mass transfer is provided. Due to the use of the fusion welding technology, the packing is connected to the heat exchange tube 2, reducing the contact thermal resistance between the packing and the straight fin heat exchange tube 2, and straight fins are distributed outside the heat exchange tube 2, increasing the heat transfer area, thus increasing the heat exchange efficiency. The temperature of the refrigerant flowing through the packing decreases, and the oil separation efficiency increases, while the coolant in the tube also absorbs the heat of the refrigerant and the temperature rises. The heated coolant can be used for waste heat utilization.

[0066] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above embodiments can be freely combined and superimposed.

[0067] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. An oil separator, characterized in that, It includes a housing (5) and an oil separation component, and the oil separation component is vertically arranged in the housing (5); The oil separation component includes: A packing layer (1) for separating oil and gas; A heat exchange component arranged in the packing layer (1) to conduct heat exchange with the oil and gas; The heat exchange component includes heat exchange tubes (2), and a plurality of the heat exchange tubes (2) are uniformly distributed. The heat exchange tubes (2) are vertically penetrated through the packing layer (1); A support plate (7) for supporting the heat exchange component is arranged below the heat exchange component; The oil separation component further includes a feed pipe (3) and an exhaust pipe (4), and the feed pipe (3) and the exhaust pipe (4) are vertically arranged; The feed pipe (3) is arranged at the top of the housing (5), and the outlet of the feed pipe (3) is arranged above the packing layer (1); The exhaust pipe (4) is a straight pipe, and the inlet of the straight pipe is arranged below the packing layer (1) and above the support plate (7), and the straight pipe is vertically penetrated through the packing layer (1) to directly penetrate out of the top of the housing (5); The packing of the packing layer (1) includes a stainless steel wire, metal chips and a molten flux mixture, or a stainless steel wire, ceramics and a molten flux mixture, or a stainless steel wire and a molten flux mixture; The packing is welded and fixed on the heat exchange tubes (2) and the exhaust pipe (4) by using a fusion welding technique, so that the packing, the heat exchange tubes (2) and the exhaust pipe (4) form an integrated device.

2. The oil separator according to claim 1, characterized in that, Heat dissipation wings (24) are arranged on the outer wall of the heat exchange tubes (2) along the axial direction.

3. The oil separator according to claim 1, characterized in that, The heat exchange component further includes a U-shaped elbow (21), and the heat exchange tubes (2) are communicated through the U-shaped elbow (21).

4. The oil separator according to claim 1, characterized in that, The oil separation component further includes an oil drain pipe, and the inlet of the oil drain pipe is arranged below the packing layer (1).

5. The oil separator according to claim 4, characterized in that, The oil separation component further includes a support plate (7) for supporting the heat exchange component, and through holes (71) are arranged on the support plate (7); The inlet of the oil drain pipe is arranged below the support plate (7), and the inlet of the exhaust pipe (4) is arranged above the support plate (7).

6. The oil separator according to claim 5, characterized in that, A sewage discharge port (11) is arranged at the bottom of the housing (5), and the inlet of the oil drain pipe is arranged between the support plate (7) and the sewage discharge port (11).

7. An air conditioning system, characterized in that, It includes an oil separator according to any one of claims 1-6.

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