Efficient oil separator for refrigeration equipment

Abstract

The invention discloses an efficient oil separator for refrigeration equipment, and relates to the technical field of oil gas treatment equipment. The device comprises a pressure container, wherein the pressure container is communicated with a refrigerant inlet pipe and a refrigerant outlet pipe; a filtering assembly is arranged in the pressure container and comprises three pipe bodies of a concentric structure, and every two adjacent pipe bodies are connected through a connecting rod A; the three pipe bodies and the refrigerant inlet pipe are matched to form three filtering cavities of an annular structure, and the three filtering cavities are of a concentric structure and are sequentially distributed from inside to outside. A porous support plate A and a porous support plate B are respectively arranged at the top and the bottom of any one of the filter cavities, the porous support plate A and the porous support plate B are both of an annular structure, and any one of the filter cavities is filled with filler. According to the invention, through the parallel design of the three filter cavities, the conduction conditions of the three filter cavities are selectively controlled and adjusted according to the load condition of the compressor during use; meanwhile, through combined use of metal filter screen filtration and filler filtration, the filtration effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas processing equipment, and in particular relates to a high-efficiency oil separator for refrigeration equipment. Background Art

[0002] High-efficiency oil separators are crucial components of modern refrigeration systems, particularly in applications that demand high energy efficiency and long-term operational reliability. Their core function is to separate as much lubricating oil as possible from the high-temperature, high-pressure refrigerant gas discharged from the compressor, effectively returning the separated oil to the compressor crankcase while allowing pure refrigerant gas to enter the condenser. In refrigeration systems, the high-temperature, high-pressure refrigerant gas discharged from the compressor is often mixed with refrigeration oil. Failure to effectively separate the lubricating oil can lead to reduced heat exchange efficiency, increased system energy consumption, and even compressor failure due to oil starvation. Traditional oil separators have low separation efficiency and are unable to adapt to load fluctuations, especially under variable operating conditions. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-efficiency oil separator for refrigeration equipment. Through the parallel design of three filter chambers, the conduction conditions of the three filter chambers can be selectively controlled and adjusted according to the load conditions of the compressor during use, thereby solving the problem that traditional oil separators cannot adapt to load changes.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a high-efficiency oil separator for refrigeration equipment, comprising a cylindrical pressure vessel, a refrigerant inlet pipe for introducing a gaseous refrigerant containing refrigeration oil into the pressure vessel, and a refrigerant outlet pipe for discharging the gaseous refrigerant after the refrigeration oil is separated; it also comprises a filter assembly, the refrigerant inlet pipe is L-shaped, and its vertical section passes through the filter assembly; the filter assembly comprises three concentric tube bodies, and two adjacent tube bodies are connected by a connecting rod A; the three tube bodies and the refrigerant inlet pipe cooperate to form three annular filter cavities, and the three filter cavities are concentric and distributed in sequence from the inside to the outside; a porous support plate A and a porous support plate B are respectively provided on the top and bottom of any of the filter cavities, and the porous support plate A and the porous support plate B are both annular in structure, and any of the filter cavities is filled with filler; the outermost tube body is sealed and fixed to the inner side wall of the pressure vessel; the discharge end of the refrigerant inlet pipe and the feed end of the refrigerant outlet pipe are respectively located on both sides of the filter assembly.

[0005] Furthermore, a sealing mechanism for selectively sealing the two porous support plates B located in the outer circle is fixed on the inner wall of the pressure vessel located below the filter assembly; the sealing mechanism includes a support ring A connected to the inner wall of the pressure vessel through a support rod, and the upper surface of the support ring A is connected to a bracket consisting of two sleeved support rings B and a connecting rod B through a telescopic module; a number of openings are provided on the porous support plate B; the bracket is provided with a first sealing module that cooperates with the outer ring porous support plate B, and a second sealing module that cooperates with the middle porous support plate B. By setting up a selective sealing mechanism, it is possible to flexibly choose to seal the outer ring porous support plate B or simultaneously seal the outer ring and the middle layer porous support plate B according to the operating status.

[0006] Furthermore, the first blocking module includes a column A fixed on the support ring B, the end of the column A is connected to a movable sleeve sleeve on the column A through a spring A, and the end of the movable sleeve is provided with a rubber sealing layer A that seals the opening; the second blocking module includes a column B fixed on the support ring B, and the end face of the column B is provided with a rubber sealing layer B that seals the opening; the first blocking module is controlled to detach from the second blocking module through the setting of spring 191, and at this time, the end of the movable sleeve of the first blocking module is kept against the porous support plate B under the action of the spring 191.

[0007] Furthermore, the telescopic module comprises an inner sleeve and an outer sleeve that seal against each other. The outer sleeve is connected to an inlet pipe with valve A and an outlet pipe with valve B, and the inlet pipe is connected to a negative pressure pump. Air pressure sensors A and B are mounted on the inner and outer walls of the inner sleeve, respectively. Both pressure sensors A and B are connected to a controller, which is connected to valves A and B. Telescopic module 15 is driven by air pressure and monitored by internal and external air pressure sensors, achieving highly automated and intelligent control of the bracket's lifting and lowering. The controller precisely adjusts the amount of telescopic movement based on the air pressure differential, ensuring that the first and second blocking modules accurately reach and execute the blocking position at the bottom of the designated filter layer. This precise and reliable operation requires no human intervention.

[0008] Furthermore, the bottom end of the pressure vessel is connected to an oil return pipe, which is equipped with a float valve mechanism to seal the end of the oil return pipe. This float valve mechanism, installed at the bottom of the pressure vessel, automatically controls the opening and closing of the oil return pipe, automatically opening or closing it based on the level of the separated refrigeration oil. When the oil level reaches a set height, the float valve mechanism activates, opening the oil return pipe to drain the oil back into the system. Once the oil level drops, the valve automatically closes, preventing gaseous refrigerant from leaking through the oil return pipe. This ensures timely and effective oil recycling while preventing refrigerant loss.

[0009] Furthermore, the float valve mechanism includes a blocking module arranged at the end of the oil return pipe, and a float valve module arranged at the end of the blocking module and controlling the blocking module to operate according to the liquid level in the pressure vessel; the float valve module includes two guide rods vertically fixed to the inner bottom side of the pressure vessel, the two guide rods sequentially passing through the float block and the drive block from top to bottom, and a connecting column is connected between the float block and the drive block; the drive block is provided with an inclined float valve mechanism on the side close to the blocking module to ensure the movement stability of the float block and the drive block through the guide rods. The float block rises and falls with the oil level, and drives the drive block to move up and down through the connecting column. The inclined design on the drive block efficiently converts the vertical movement of the drive block into a horizontal force acting on the blocking module to drive it to open or close, so that the float valve operates sensitively and reliably, and automatically controls the on and off of the return oil by using the change in liquid level.

[0010] Furthermore, the end of the oil return pipe is provided with an end plate A, which is tilted and equipped with a guide sleeve. A movable rod A is provided on the guide sleeve and passes through the end plate A. One end of the movable rod A is provided with a ball A, and the other end is provided with a limit plate A. Several oil return holes A are provided on the end plate A around the guide sleeve, and blocking posts A are provided on the limit plate to be inserted into the oil return holes A. The tilted end plate A and guide sleeve guide the movement of the movable rod A. The ball A cooperates with the inclined surface of the drive block to convert the lifting motion of the drive block into movement of the movable rod A along its length, thereby driving the blocking posts A to be inserted into or removed from the oil return holes A, achieving on-off control of the oil circuit.

[0011] Furthermore, a vertical end plate B is provided at the end of the return oil pipe, a through hole is provided on the end plate B, and an oil return hole B is provided on the end plate B located on the side of the through hole, a movable rod B is provided through the through hole, and a limit plate B and a sphere B are provided at both ends of the movable rod B respectively; a blocking column B is provided on the limit plate B and inserted into the oil return hole B; a magnetic ring A is provided on the movable rod B, and a magnetic ring B is provided on the outer wall of the end plate B, and the magnetic ring A and the magnetic ring B repel each other, and the repulsive force generated by the magnetic ring A and the magnetic ring B is utilized so that when the float valve drive block does not apply pressure, the movable rod B moves to the side away from the end plate B, driving the blocking column B to be inserted into the oil return hole B to realize normally closed; when the oil level rises and the drive block presses down the sphere B to overcome the magnetic force, the movable rod B moves to the side close to the end plate B, and the blocking column B is pulled out of the oil return hole B to realize oil return.

[0012] Furthermore, the refrigerant inlet pipe is equipped with multiple metal screens to perform preliminary coarse filtration before the refrigerant enters the concentric filter assembly. This can pre-intercept larger oil droplets and foreign particles, reducing the filtering burden of the subsequent fine packing layer, reducing its clogging rate, and extending the cleaning or replacement cycle of the main filter assembly, helping to maintain the long-term efficient operation of the entire oil separator.

[0013] Furthermore, a temperature sensor and refrigeration module are installed at the bottom of the pressure vessel to monitor and control the temperature of the separated refrigeration oil. Actively cooling the oil through the refrigeration module reduces its viscosity, improving its fluidity and facilitating smooth return to the compressor through the oil return pipe. This prevents problems such as poor oil return or blockage caused by excessive oil viscosity, particularly during low-temperature startup or low ambient temperatures, thereby ensuring the reliability of the oil recovery system.

[0014] The present invention has the following beneficial effects: The present invention adopts a parallel design of three filter chambers, and selectively controls the conduction conditions of the three filter chambers to adjust according to the load conditions of the compressor during use; at the same time, the present invention improves the filtering effect by combining metal filter mesh filtration and filler filtration.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 Schematic diagram of the oil separator structure of the present invention Figure 1 ; Figure 2 for Figure 1 A partial enlarged view of the middle part; Figure 3 This is a structural schematic diagram of the first blocking module of the present invention; Figure 4 Schematic diagram of the oil separator structure of the present invention Figure 2 ; Figure 5 for Figure 4 A partial enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the refrigeration equipment of the present invention; Figure 7 Schematic diagram of the oil separator structure of the present invention Figure 3 ; Figure 8 for Figure 7 A partial enlarged view of point C in the middle; In the accompanying drawings, the components represented by the reference numerals are as follows: 1-pressure vessel, 2-tube body, 3-guide rod, 4-return oil pipe, 7-manifold, 11-refrigerant inlet pipe, 12-refrigerant outlet pipe, 14-support rod, 15-telescopic module, 16-connecting rod B, 17-refrigeration module, 18-second plugging module, 19-first plugging module, 20-filler, 21-porous support plate A, 22-porous support plate B, 31-floating block, 32-connecting column, 33-driving block, 34-inclined surface, 40-end plate A, 41-guide sleeve, 42-movable rod A, 43-sphere A, 44-limiting plate A, 45-blocking column A, 46-end plate B, 47-movable rod B, 48-magnetic ring A, 49-magnetic ring B, 61-compressor, 62-condenser, 63-liquid storage tank, 64-distribution valve, 65-evaporator, 71-first air hole, 72-second air hole, 73-third air hole, 74-base block, 75-pillar A, 76-sealing ring A, 77-sleeve, 78-top rod (sealing ring B), 110-metal filter, 141-support ring A, 151-inner sleeve, 152-outer sleeve, 153-inlet pipe, 154-valve A, 155-outlet pipe, 156-valve B, 161-support ring B, 190-column A, 191-spring A, 192-movable sleeve, 193-rubber sealing layer A, 401-oil return hole A, 461-through hole, 462-oil return hole B. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] Example 1: See also Figure 1As shown, the present invention is a high-efficiency oil separator for refrigeration equipment, comprising a cylindrical pressure vessel 1, a refrigerant inlet pipe 11 for introducing a gaseous refrigerant containing refrigeration oil into the pressure vessel is installed on one side of the top of the pressure vessel 1, and a refrigerant outlet pipe 12 for discharging the gaseous refrigerant after the refrigeration oil is separated is installed on the top; in order to facilitate the separation of refrigeration oil from the gaseous refrigerant during use, the refrigerant inlet pipe 11 is L-shaped, and by arranging multiple metal filters 110 on its vertical section, the refrigerant can be preliminarily coarsely filtered to pre-intercept larger oil droplets and impurity particles.

[0021] In order to improve the filtering effect and reduce the content of refrigeration oil in the gaseous refrigerant discharged from the refrigerant outlet pipe 12, the present invention is provided with a filtering assembly in the pressure vessel 1, so that when in use, the gas is introduced through the refrigerant inlet pipe 11 and discharged through the refrigerant outlet pipe 12 after passing through the filtering assembly.

[0022] Specifically, the filter assembly provided by the present invention includes three concentric tube bodies 2, where two adjacent tube bodies 2 are connected by a connecting rod A, and the tube body 2 located on the inner side is connected to the outer wall of the vertical section of the refrigerant inlet pipe 11 through the connecting rod A, and the tube body 2 located on the outer side is sealed and fixed to the inner wall of the pressure vessel 1. Then, when in use, three annular filter cavities are formed by the cooperation of the tube body 2 and the refrigerant inlet pipe 11. The three filter cavities are concentric in structure and are distributed in sequence from the inside to the outside, and the three tube bodies 2 are concentric in structure.

[0023] During use, in order to adapt to the changes when the compressor is running at low load and high load, the gas flow of the compressor will change at low load or high load. Based on this, in order to adjust the filtration of the filter assembly according to the load changes during use, a porous support plate A21 is fixed on the top of each filter cavity, and a porous support plate B22 is installed on the bottom of each filter cavity. The filter cavity composed of the porous support plate B22, the porous support plate A21 and the tube body 2 is filled with filler 20; and the porous support plate A21 and the porous support plate B22 are both annular structures.

[0024] In the following, the three filter cavities from the inside to the outside are marked as A1, A2, and A3 respectively. At low load, A1 remains normally open; at medium load, A1 and A2 are controlled to remain normally open; at high load, A1, A2, and A3 are controlled to remain normally open. In order to achieve the above functions, the present invention provides a blocking mechanism, which uses the blocking mechanism to selectively block the two porous support plates B22 located on the outer circle.

[0025] Specifically, the sealing mechanism includes a support ring A141 connected to the inner wall of the pressure vessel 1 through a support rod 14, and the upper surface of the support ring A141 is connected to a bracket consisting of two sleeved support rings B161 and a connecting rod B16 through a telescopic module 15; a plurality of openings are provided on the porous support plate B22; a first sealing module 19 is provided on the bracket to cooperate with the outer ring porous support plate B22, and a second sealing module 18 is provided to cooperate with the middle porous support plate B22.

[0026] In order to achieve the above functions, the top end face of the first blocking module 19 provided by the present invention is higher than the top end face of the second blocking module 18 in a natural state. Since the bottom ends of the first blocking module 19 and the second blocking module 18 change in height synchronously with the extension and retraction of the telescopic module 15 during use, that is, when in use, it is necessary to keep the height of the top end face of the first blocking module 19 unchanged and then decrease when the telescopic module 15 contracts.

[0027] That is, the first blocking module 19 includes a column A190 fixed on the support ring B161, the end of the column A190 is connected to a movable sleeve 192 sleeved on the column A190 through a spring A191, and the end of the movable sleeve 192 is provided with a rubber sealing layer A193 that seals with the opening; the second blocking module 18 includes a column B fixed on the support ring B161, and the end face of the column B is provided with a rubber sealing layer B that seals with the opening.

[0028] During use, in order to facilitate the control of the telescopic module 15 to extend and retract according to demand, the telescopic module 15 provided by the present invention can optionally use an electric telescopic rod, a micro telescopic motor, or the structure shown below.

[0029] Specifically, the telescopic module 15 includes an inner sleeve 151 and an outer sleeve 152 that are sealed together. The outer sleeve 152 is connected to an air inlet pipe 153 with a valve A154 and an air outlet pipe 155 with a valve B156, and the air inlet pipe 153 is connected to a negative pressure pump; the inner wall of the inner sleeve 151 and the outer wall of the outer sleeve 152 are respectively installed with an air pressure sensor A and an air pressure sensor B; the air pressure sensor A and the air pressure sensor B are both connected to a controller, and the controller is connected to valve A154 and valve B156, and then when in use, the air pressure sensor A and the air pressure sensor B are used to detect the pressure difference between the inside and outside of the telescopic module 15, and then the telescopic length of the telescopic module 15 is changed when in use.

[0030] When the load of the compressor changes, the pressure in the pressure vessel 1 will change. When the low load turns to a high load, the pressure in the pressure vessel 1 increases, causing the telescopic module 15 to contract under the premise that the amount of gas in the telescopic module 15 remains unchanged, and then the second blocking module 18 is controlled to descend, or the second blocking module 18 and the first blocking module 19 are controlled to descend during use, thereby facilitating the control of the conduction of the corresponding openings; conversely, when the high load turns to the low load, the pressure in the pressure vessel 1 increases, causing the telescopic module 15 to extend under the premise that the amount of gas in the telescopic module 15 remains unchanged; through the setting of the negative pressure pump, it is convenient to control the injection of gas into the telescopic module 15 according to the external force required during use.

[0031] On the basis of the above, in order to facilitate the control of oil circulation, the return oil pipe 4 is connected to the bottom end of the pressure vessel 1, and a float valve mechanism is provided in the pressure vessel 1 to seal the end of the return oil pipe 4. The float valve mechanism includes a sealing module arranged at the end of the return oil pipe 4, and a float valve module arranged at the end of the sealing module and controlling the action of the sealing module according to the liquid level in the pressure vessel 1.

[0032] The present invention specifically provides a specific structure of a float valve module, such as Figure 1 The float valve module includes two guide rods 3 vertically fixed to the inner bottom side of the pressure vessel 1. The two guide rods 3 pass through the floating block 31 and the driving block 33 from top to bottom. The floating block 31 and the driving block 33 are connected by a connecting column 32. The driving block 33 is provided with an inclined surface 34 on the side close to the blocking module.

[0033] Two implementations of the blocking module are provided below.

[0034] Form 1: For example Figure 1-2 As shown, the provided blocking module includes an end plate A40 that is sealed and installed at the end of the oil return pipe 4 in an inclined shape. A guide sleeve 41 with a movable rod A42 passing through the inner portion is fixed to the outer side of the end plate A40, and the movable rod A42 passes through the end plate A40. A sphere A43 and a limit plate A44 are respectively provided at both ends of the movable rod A42; a plurality of oil return holes A401 are provided on the end plate A40 located on the periphery of the guide sleeve 41, and a blocking column A43 is provided on the limit plate 44 to be inserted into the oil return hole A401. 5. When the liquid level in the pressure vessel 1 rises, the driving block 33 moves upward along with the rising liquid level, and then the movable rod A42 is driven to move upward along its axial direction under the action of the abutment between the inclined surface 34 and the sphere A43. At this time, the blocking column A45 is pulled out from the oil return hole A401, thereby opening the oil return hole A401. When the liquid level drops, the movable rod A42 is controlled to move downward along its axial direction under the action of gravity, and the blocking column A45 is inserted into the oil return hole A401 for sealing.

[0035] Form 2: Figure 4-5As shown, the provided blocking module includes an end plate B46 that is vertically and sealingly installed at the end of the oil return pipe 4, a through hole 461 is provided on the end plate B46, and an oil return hole B462 is provided on the end plate B46 located around the through hole 461, a movable rod B47 is provided through the through hole 461, and a limit plate B472 and a sphere B471 are provided at both ends of the movable rod B47 respectively; a blocking column B is provided on the limit plate B472 and inserted into the oil return hole B462; a magnetic ring A48 is provided on the movable rod B47, and a magnetic ring B49 is provided on the outer wall of the end plate B46. , the magnetic ring A48 and the magnetic ring B49 repel each other; when the liquid level in the pressure vessel 1 rises, the driving block 33 moves upward along with the rising liquid level, and then drives the movable rod B47 to move to the right along its axial direction under the action of the abutment between the inclined surface 34 and the sphere B471. At this time, the blocking column B is pulled out from the oil return hole B462, and then the oil return hole A401 is opened; when the liquid level drops, the movable rod B47 is controlled to move to the left along its axial direction under the action of the magnetic force of the magnetic ring A48 and the magnetic ring B49, and the blocking column B is inserted into the oil return hole B462 for sealing.

[0036] The oil separator is located after the compressor's exhaust port. After compression, the refrigerant gas mixed with the refrigeration lubricant oil reaches a very high temperature. When this hot gas-oil mixture enters the oil separator, heat is inevitably transferred to the oil separator's outer shell and internal structure. To prevent excessive heat loss in the compressor's exhaust piping, the compressor exhaust pipe and the connected oil separator are sometimes wrapped in insulation. While this helps maintain system efficiency, it also increases the temperature of the oil separator's outer shell, and the lubricant oil accumulated inside the oil separator also reaches a high temperature. The heat stored in this lubricant oil continuously heats the oil separator's shell and bottom area. High temperatures are the primary catalyst for lubricant oil oxidation. Oxidized lubricant oil turns black and thickens, producing acidic substances and solid deposits such as colloids and sludge. These solid deposits can clog the oil line, leading to oil shortages and increased wear. To address this issue, the present invention incorporates a temperature sensor and a refrigeration module 17 at the bottom of the pressure vessel 1. The temperature sensor monitors the oil temperature, and the refrigeration module 17 is configured to cool the oil when it becomes too hot.

[0037] In order to facilitate cooling, the refrigeration module 17 provided by the present invention can be installed in a serpentine pipe in the pressure vessel 1. When cooling is required, heat is removed by passing a cold flow into the serpentine pipe.

[0038] In method 1, the inlet end of the serpentine pipe is connected to cold water.

[0039] In the second method, if Figure 6The refrigeration equipment includes a compressor 61. The air outlet of the compressor 61 is connected to the condenser 62 through a pipe A equipped with a high-pressure valve. The condenser 62 is connected to the liquid storage tank 63. The liquid storage tank 63 is connected to the distribution valve 64 through a pipeline. The two outlets of the distribution valve 64 are respectively connected to the evaporator 65 and the serpentine pipe, and the outlet ends of the evaporator and the serpentine pipe are both connected to a pipe B equipped with a low-pressure valve. The pipe B is connected to the air inlet end of the compressor 61. During use, the cooling of the serpentine pipe and the cooling effect are adjusted according to demand by controlling the action of the distribution valve 64.

[0040] When the refrigerant used in the refrigeration equipment is a fluorine series, the pressure vessel 1 is made of 316L stainless steel. When ammonia is used, the pressure vessel 1 is made of corrosion-resistant alloy steel.

[0041] Example 2, as Figure 7-8 On the basis of Example 1, in order to realize the corresponding diversion of the gas discharged from the end of the refrigerant inlet pipe 11 when the filter chamber is connected during use, a diversion mechanism is installed at the end of the refrigerant inlet pipe 11; the diversion mechanism includes a diverter plate 7 and a blocking component for blocking the diverter plate 7, and the diverter plate 7 is provided with a circle of first air holes 71, a circle of second air holes 72 and a circle of third air holes 73 from the inside to the outside. The angles between the first air holes 71, the second air holes 72 and the third air holes 73 and the surface of the diverter plate 7 are 5°, 7.5° and 11° respectively.

[0042] The sealing assembly includes a base block 74 connected to the inner support ring B161 through a connecting rod B. The upper surface of the base block 74 is connected to a sealing ring A76 for sealing the second air hole 72 through four pillars A75. The bottom side of the base block 74 is connected to four sleeves 77. The bottom side of the sleeve 77 is connected to a push rod 78 that moves up and down along the inner wall of the sleeve 77 through a first spring. The push rod 78 passes through the base block 74 and is connected to a sealing ring B78 that seals the third air hole 73 at its end. When the second blocking module 18 is detached from the porous support plate B22, the blocking ring A76 is detached from the second air hole 72; when the first blocking module 19 is detached from the porous support plate B22, the blocking ring B78 is detached from the third air hole 73; that is, in the natural state without force, the height difference between the top surfaces of the second blocking module 18 and the first blocking module 19 is 0.5 cm, and the height difference between the top surfaces of the blocking ring B78 and the blocking ring A76 is 0.5 cm.

[0043] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency oil separator for refrigeration equipment, characterized in that: It comprises a cylindrical pressure vessel (1), and a refrigerant inlet pipe (11) for introducing a gaseous refrigerant containing refrigeration oil into the pressure vessel; a refrigerant outlet pipe (12) for discharging the gaseous refrigerant after the refrigeration oil is separated; It also includes a filter assembly, wherein the refrigerant inlet pipe (11) is L-shaped, and its vertical section passes through the filter assembly; the filter assembly includes three concentric tube bodies (2), and two adjacent tube bodies (2) are connected by a connecting rod A; the three tube bodies (2) and the refrigerant inlet pipe (11) cooperate to form three annular filter cavities, and the three filter cavities are concentric and distributed in sequence from the inside to the outside; A porous support plate A (21) and a porous support plate B (22) are respectively provided at the top and bottom of any of the filter cavities, wherein the porous support plate A (21) and the porous support plate B (22) are both annular in structure, and a filler (20) is filled in any of the filter cavities; The outermost tube body (2) is sealed and fixed to the inner wall of the pressure container (1); the discharge end of the refrigerant inlet pipe (11) and the feed end of the refrigerant outlet pipe (12) are respectively located on both sides of the filter assembly.

2. The high-efficiency oil separator for refrigeration equipment according to claim 1, characterized in that: A blocking mechanism for selectively blocking two porous support plates B (22) located on the outer ring is fixed on the inner wall of the pressure vessel (1) located below the filter assembly; The blocking mechanism comprises a support ring A (141) connected to the inner wall of the pressure vessel (1) via a support rod (14); the upper surface of the support ring A (141) is connected to a bracket consisting of two sleeved support rings B (161) and a connecting rod B (16) via a telescopic module (15); The porous support plate B (22) is provided with a plurality of openings; The bracket is provided with a first blocking module (19) that cooperates with the outer porous support plate B (22), and a second blocking module (18) that cooperates with the middle porous support plate B (22).

3. The high-efficiency oil separator for refrigeration equipment according to claim 2, characterized in that: The first blocking module (19) comprises a column A (190) fixed on a support ring B (161), the end of the column A (190) being connected to a movable sleeve (192) sleeved on the column A (190) via a spring A (191), and the end of the movable sleeve (192) being provided with a rubber sealing layer A (193) that cooperates with the opening seal; The second blocking module (18) comprises a column B fixed on a support ring B (161), and a rubber sealing layer B is provided on the end surface of the column B to open the opening.

4. The high-efficiency oil separator for refrigeration equipment according to claim 1, characterized in that: The telescopic module (15) comprises an inner sleeve (151) and an outer sleeve (152) that are sealed and matched with each other. An air inlet pipe (153) having a valve A (154) and an air outlet pipe (155) having a valve B (156) are connected to the outer sleeve (152). The air inlet pipe (153) is connected to a negative pressure pump. An air pressure sensor A and an air pressure sensor B are installed on the inner wall of the inner sleeve (151) and the outer wall of the outer sleeve (152), respectively; The air pressure sensor A and the air pressure sensor B are both connected to a controller, and the controller is connected to a valve A (154) and a valve B (156).

5. The high-efficiency oil separator for refrigeration equipment according to claim 1, characterized in that: The bottom end of the pressure container (1) is connected to the oil return pipe (4), and a float valve mechanism for sealing the end of the oil return pipe (4) is provided in the pressure container (1).

6. The high-efficiency oil separator for refrigeration equipment according to claim 5, characterized in that: The float valve mechanism comprises a blocking module arranged at the end of the oil return pipe (4), and a float valve module arranged at the end of the blocking module and controlling the blocking module to operate according to the liquid level in the pressure container (1); The float valve module comprises two guide rods (3) vertically fixed to the inner bottom side of the pressure vessel (1), the two guide rods (3) sequentially passing through the float block (31) and the drive block (33) from top to bottom, and a connecting column (32) connecting the float block (31) and the drive block (33); A slope (34) is provided on one side of the driving block (33) close to the blocking module.

7. The high-efficiency oil separator for refrigeration equipment according to claim 6, characterized in that: An end plate A (40) is provided at the end of the oil return pipe (4), the end plate A (40) is tilted, a guide sleeve (41) is provided outside the end plate A (40), a movable rod A (42) passing through the end plate A (40) is provided on the guide sleeve (41), a sphere A (43) is provided at one end of the movable rod A (42), and a limit plate A (44) is provided at the other end; A plurality of oil return holes A (401) are provided on the end plate A (40) located on the peripheral side of the guide sleeve (41), and a blocking column A (45) inserted into the oil return hole A (401) is provided on the limiting plate (44).

8. The high-efficiency oil separator for refrigeration equipment according to claim 6, characterized in that: The end of the oil return pipe (4) is provided with a vertical end plate B (46), a through hole (461) is provided on the end plate B (46), an oil return hole B (462) is provided on the end plate B (46) located on the side of the through hole (461), a movable rod B (47) is provided through the through hole (461), and a limit plate B (472) and a sphere B (471) are provided at both ends of the movable rod B (47), respectively; a blocking column B is provided on the limit plate B (472) and is inserted into the oil return hole B (462); A magnetic ring A (48) is provided on the movable rod B (47), and a magnetic ring B (49) is provided on the outer wall of the end plate B (46), and the magnetic ring A (48) and the magnetic ring B (49) repel each other.

9. The high-efficiency oil separator for refrigeration equipment according to claim 1, characterized in that: A plurality of metal filter screens (110) are provided on the refrigerant inlet pipe (11).

10. The high-efficiency oil separator for refrigeration equipment according to claim 6, characterized in that: A temperature sensor and a refrigeration module (17) are provided at the bottom of the pressure container (1).

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