Gas-liquid separator based on taper rod control return oil amount

Abstract

The application provides a gas-liquid separator based on a conical rod for controlling the amount of returned oil, comprising a tank body, an air inlet, an air outlet, an exhaust pipe, a conical rod, a hard oil return pipe, a soft oil return pipe, a float and a sliding oil suction assembly; the conical rod is installed in the tank body, the upper and lower end surfaces of the conical rod have different cross-sectional areas, and the sliding oil suction assembly is sleeved on the conical rod through a hole structure; when the sliding oil suction assembly floats up and down with the float, the hole structure moves up and down on the conical rod, the gap between the oil suction hole and the conical rod changes with the up-and-down movement of the sliding oil suction assembly, and the function of controlling the amount of returned oil is realized through the change of the gap between the oil suction hole and the conical rod. Through the up-and-down floating of the float, the sliding oil suction assembly is driven to move up and down along the conical rod, the gap between the oil suction hole and the conical rod is enlarged or reduced, the amount of returned oil entering the oil suction hole is controlled, the purpose of the higher the liquid level, the more the returned oil is achieved, and the lubrication of the compressor and the performance requirements of the system are fully met.

Description

Technical Field

[0001] This invention relates to the field of thermal management for electric vehicles, and more specifically, to a gas-liquid separator based on a cone rod to control the return oil volume. Background Technology

[0002] In traditional non-heat pump air conditioning systems, the compressor / refrigerant system typically operates above 0°C. Under these conditions, the compressor lubricating oil (PAG or POE) and refrigerant R134a are miscible. Therefore, in such compressor / refrigerant systems, an oil suction port is usually installed at the bottom of the refrigerant outlet pipe of the gas-liquid separator. Utilizing the negative pressure generated by the compressor's operation, a portion of the refrigerant and lubricating oil mixture within the gas-liquid separator is drawn back into the compressor through this port, thus returning the lubricating oil to the compressor. To prevent excessive refrigerant and lubricating oil mixture from being drawn into the compressor and affecting cooling performance, the size of this oil return port needs to be optimized to ensure sufficient oil return while minimizing excessive liquid entering the compressor. In traditional automotive air conditioning systems, this requirement is easily met because the refrigerant charge is constant, and the system only operates in cooling mode. The magnitude of the operating heat load has little impact on the liquid level within the gas-liquid separator. Therefore, using a constant-sized oil return port has minimal impact on the amount of oil returned.

[0003] To save energy, an increasing number of electric vehicles are equipped with heat pump systems, which are required to operate in low-temperature environments (such as -20°C). Electric vehicles using heat pump systems must, on the one hand, ensure their compressor / refrigerant systems function at -20°C. At this temperature, the miscibility of lubricating oil and refrigerant decreases, causing stratification. In this case, the lubricating oil is on the upper layer of the liquid, and the refrigerant is on the lower layer. Traditional gas-liquid separator oil return methods cannot return the lubricating oil to the compressor. On the other hand, in a heat pump system, once the refrigerant charge is fixed, more refrigerant is needed for system circulation in cooling mode, resulting in a lower liquid level in the gas-liquid separator; in heating mode, less refrigerant participates in system circulation, resulting in a much higher liquid level in the gas-liquid separator compared to cooling mode.

[0004] Therefore, in heat pump systems, the gas-liquid separator needs to have increased internal volume to cope with the large amount of refrigerant accumulating during heating mode. It also needs to consider the different oil return requirements for heating and cooling modes, requiring the gas-liquid separator to have the function of increasing oil return as the liquid level increases. This prevents excessive liquid from entering the compressor during cooling, which could affect performance, and also prevents excessive lubricating oil accumulation in the gas-liquid separator during heating, which could lead to compressor oil shortage, wear of mechanical parts, or even failure. However, current research on controlling the oil return of the gas-liquid separator under different operating conditions is still limited.

[0005] Patent document CN115468341A discloses a gas-liquid separator, including a head, a tank, and an outlet pipe. The head has a gas-liquid separator inlet and outlet, the tank has a cavity, and the outlet pipe has an inlet and an outlet. The outlet is connected to the outside through the gas-liquid separator outlet, and the inlet is located within the cavity. The gas-liquid separator also includes an oil return device, which includes a float, an oil return port, a connecting pipe, and a guiding structure. The connecting pipe connects the oil return port and the outlet pipe. The float floats on the surface of the liquid working medium along the guiding structure, and the oil return port moves with the float. In this way, the float can float on the surface of the liquid working medium, and regardless of the height of the liquid working medium, the lubricating oil can preferentially enter the oil return port, resulting in good oil return effect. Although this solution can achieve oil return, it cannot control the amount of oil returned according to different operating conditions. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a gas-liquid separator based on cone rod control of oil return volume.

[0007] According to the present invention, a gas-liquid separator based on cone rod control of oil return volume includes...

[0008] Tank body, air inlet, exhaust outlet, exhaust pipe, cone rod, return oil hard pipe, return oil hose, float, and sliding oil suction assembly;

[0009] The top of the tank is provided with an air inlet and an exhaust outlet;

[0010] After evaporation, the gas and liquid phases enter the tank through the air inlet. The liquid flows down the inner wall of the tank, forming a mixed or stratified liquid level. The gaseous substance enters the exhaust pipe and is discharged through the exhaust port.

[0011] A return oil hard pipe is connected to the exhaust pipe, and the sliding oil suction assembly is connected to the return oil hard pipe through a return oil hose.

[0012] The sliding oil suction assembly is connected to the float;

[0013] The sliding oil suction assembly includes an oil suction hole and a hole structure, wherein the oil suction hole and the hole structure are connected.

[0014] The cone rod is installed inside the tank, and the upper and lower end faces of the cone rod have different cross-sectional areas. The sliding oil suction assembly is fitted onto the cone rod through a hole structure.

[0015] The oil suction hole can always be at the top of the mixed or stratified liquid level through the action of the float; when the sliding oil suction assembly floats up and down with the float, the hole structure moves up and down on the cone rod, and the gap between the oil suction hole and the cone rod changes with the up and down movement of the sliding oil suction assembly. The function of controlling the oil return volume is realized by the change of the gap between the oil suction hole and the cone rod.

[0016] Preferably, the hole structure is a tapered hole structure with a smaller top and a larger bottom.

[0017] Preferably, it also includes a cone rod seat, the cone rod being mounted inside the tank via the cone rod seat.

[0018] Preferably, the sliding oil suction assembly further includes a filter screen, and the oil suction hole is provided with a filter screen.

[0019] Preferably, the sliding oil suction assembly further includes a nut, and the filter screen is fixed to the oil suction hole by the nut.

[0020] Preferably, it also includes a limiting guide rail;

[0021] The sliding oil suction assembly also includes a slider; the oil suction hole and the hole structure are both provided on the slider, and the oil suction hole and the return oil hose are connected by the nut;

[0022] The limiting guide rail is installed inside the tank; the slider is installed on the limiting guide rail, which limits the slider to move only in the up and down direction.

[0023] Preferably, limit blocks are installed at both the upper and lower ends of the limiting guide rail, and the limit blocks are used to limit the movement of the slider between the upper and lower limit blocks.

[0024] Preferably, the end of the return oil hard pipe is provided with a hose guide bracket, and sufficient return oil hose length is reserved;

[0025] Preferably, it also includes a liquid level signal triggering device;

[0026] The liquid level signal triggering device includes a signal pin, a switch contact, a contact spring, and a push rod mounted on the float; the signal pin, switch contact, and contact spring are all mounted on the top of the tank, and there are two pins.

[0027] When the liquid level in the gas-liquid separator tank reaches the preset limit height, the push rod on the float will push the switch contact plate upward, compress the contact plate spring, and make the switch contact plate simultaneously connect two signal pins to realize the function of recognizing the excessive liquid level signal.

[0028] Preferably, the exhaust pipe is a U-shaped pipe.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. This invention uses the up-and-down movement of a float to drive the sliding oil suction assembly to move up and down along the cone rod, causing the gap between the oil suction hole and the cone rod (i.e., the flow cross-sectional area of ​​the oil suction hole inlet) to increase or decrease, thereby controlling the amount of oil returning into the oil suction hole. This achieves the goal of increasing the amount of oil returning as the liquid level increases, fully meeting the lubrication and system performance requirements of the compressor.

[0031] 2. The oil suction hole of the present invention is also provided with a filter screen, which can prevent impurities from entering the return oil hose, thereby reducing the impurity content in the return oil path.

[0032] 3. The present invention also includes a liquid level signal triggering device, which has a simple structure, replaces the function of the liquid level sensor, and saves costs. Attached Figure Description

[0033] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2 for Figure 1 Another structural diagram from another angle;

[0036] Figure 3 This is a schematic diagram of the sliding oil suction component in this invention;

[0037] Figure 4 for Figure 3 A partial sectional view;

[0038] Figure 5 This is a schematic diagram showing the fit between the tapered rod and the oil suction hole when the hole structure is located at the upper part of the tapered rod.

[0039] Figure 6 This is a schematic diagram of the fit between the tapered rod and the oil suction hole when the hole structure is located at the lower part of the tapered rod.

[0040] Figure 7 A schematic diagram illustrating the principle of the connection between the tapered rod and the oil suction hole;

[0041] Figure 8 This is a schematic diagram of the hose guide bracket in this invention;

[0042] Figure 9 This is a schematic diagram of the signal triggering state of the liquid level signal triggering device in this invention;

[0043] Figure 10 This is a schematic diagram of the liquid level signal triggering device in the present invention in the state where the signal is not triggered.

[0044] The diagram shows:

[0045] Detailed Implementation

[0046] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0047] This invention provides a gas-liquid separator based on cone rod control of oil return volume, such as... Figure 1-10 As shown, it includes a tank body 1, an air inlet 2, an exhaust outlet 3, an exhaust pipe 4, a cone rod 5, a return oil hard pipe 6, a return oil hose 7, a float 8, and a sliding oil suction assembly 9; the top of the tank body 1 is provided with an air inlet 2 and an exhaust outlet 3;

[0048] The air inlet 2 is not in direct contact with one end of the oil return hose 7; the exhaust port 3 is connected to the other end of the oil return hose 7. The evaporated gas-liquid two-phase substance enters the tank 1 through the air inlet 2. Since the diameter of the gas-liquid separator air inlet 2 is smaller than the inner diameter of the tank 1, the larger droplets mixed in the gas-liquid two-phase substance are directly separated from the gas under the action of gravity. The liquid substance flows down along the inner wall of the tank 1, forming a mixed or stratified liquid level. The gaseous substance enters the exhaust pipe 4 and is discharged through the exhaust port 3. Specifically, the exhaust pipe 4 is a U-shaped pipe. The evaporated gas-liquid two-phase substance is a gas-liquid two-phase refrigerant containing lubricating oil. The gas-liquid two-phase refrigerant containing lubricating oil enters the tank 1 through the air inlet 2. The liquid refrigerant flows down along the inner wall of the tank 1, forming a mixed or stratified liquid level of refrigerant and lubricating oil. The gaseous refrigerant enters the U-shaped pipe and flows through the exhaust port 3 into the compressor.

[0049] A return oil hard pipe 6 is connected to the exhaust pipe 4. Specifically, to prevent lubricating oil from accumulating in the gas-liquid separator with the refrigerant, causing oil shortage and wear of the compressor, a return oil hard pipe 6 is installed at the bottom of the U-shaped pipe. The sliding oil suction assembly 9 is connected to the return oil hard pipe 6 through a return oil hose 7; the sliding oil suction assembly 9 is connected to the float 8, thus ensuring that the oil suction hole 92 is always at the top of the liquid level; specifically, the oil suction hole 92 of the sliding oil suction assembly 9 is connected to the hole structure 95; the oil suction hole 92 can always be at the top of the mixed or stratified liquid level through the action of the float 8. More specifically, when the float 8 floats up and down with the liquid level, it will drive the sliding oil suction assembly to float up and down as well. By setting the relative position of the float 8 and the inlet of the oil suction hole 92, it can be ensured that the inlet of the oil suction hole 92 is always at the top of the liquid level. Under the suction force generated by the compressor operation, the liquid at the top level (a mixture of refrigerant and lubricating oil or lubricating oil) enters the compressor through the oil return passage consisting of the gap between the oil suction hole 92 and the cone rod 5, the oil suction hole 92, the oil return hose 7, the oil return hard pipe 6, the exhaust pipe 4, and the exhaust port 3, thus realizing the function of oil return.

[0050] The cone rod 5 is installed inside the tank body 1. The upper and lower end faces of the cone rod 5 have different cross-sectional areas. The sliding oil suction assembly 9 is fitted onto the cone rod 5 through a hole structure 95. In a preferred embodiment, the hole structure 95 is a conical hole structure with a smaller upper surface and a larger lower surface. In a preferred embodiment, the gas-liquid separator that controls the return oil volume based on the cone rod also includes a cone rod seat 51, through which the cone rod 5 is installed inside the tank body 1.

[0051] When the sliding oil suction assembly 9 floats up and down with the float 8, the hole structure 95 moves up and down on the cone rod 5. The gap between the oil suction hole 92 and the cone rod 5 changes with the up and down movement of the sliding oil suction assembly 9. The function of controlling the oil return volume is realized by the change of the gap between the oil suction hole 92 and the cone rod 5.

[0052] Specifically, such as Figure 7 As shown, the up-and-down movement of the float causes the sliding oil suction assembly to move up and down along the cone rod, resulting in the gap between the oil suction hole 92 and the cone rod 5 (i.e., the flow cross-sectional area of ​​the oil suction hole inlet) increasing or decreasing, thus controlling the amount of oil returning into the oil suction hole. This achieves the goal of increasing the amount of oil returning as the liquid level rises, fully meeting the lubrication and system performance requirements of the compressor.

[0053] The sliding oil suction assembly 9 also includes a nut 93 and a filter screen 94. The oil suction hole 92 is provided with a filter screen 94, which is used to prevent impurities from entering the return oil hose 7.

[0054] The gas-liquid separator based on cone rod control of oil return volume further includes a limiting guide rail 10. The sliding oil suction assembly 9 also includes a slider 91, with an oil suction hole 92 and a hole structure 95 both disposed on the slider 91. The oil suction hole 92 is connected to the oil return hose 7 via the nut 93. The limiting guide rail 10 is installed inside the tank body 1. The slider 91 is mounted on the limiting guide rail 10, which restricts the slider 91 to move only in the vertical direction. Specifically, two limiting guide rails 10 are provided on the outside of the sliding oil suction assembly. Limiting structures are located above and below the limiting guide rails 10, ensuring that the sliding oil suction assembly 9 can only move vertically within the range of two upper and lower limiting structures. More specifically, the cone rod 5 and the cone rod seat 51 are located between the two limiting guide rails 10, and the limiting structure is a limiting block.

[0055] The end of the return oil hard pipe 6 is provided with a hose guide bracket 12, and sufficient length of return oil hose 7 is reserved. The hose guide bracket 12 is used to prevent the return oil hose 7 from deforming itself due to the return oil hose 7 being taut at a high liquid level or loose at a low liquid level during the movement of the sliding oil suction assembly 9.

[0056] The gas-liquid separator based on cone rod control of oil return volume further includes a liquid level signal triggering device 11. The liquid level signal triggering device 11 includes signal pins 111, switch contacts 112, contact springs 114, and a push rod 113 mounted on a float 8. The signal pins 111, switch contacts 112, and contact springs 114 are all mounted on the top of the tank 1, with two pins 111. When the liquid level inside the gas-liquid separator tank 1 reaches a preset limit height, the push rod 113 on the float 8 pushes the switch contacts 112 upwards, compressing the contact springs 114, causing the switch contacts 112 to simultaneously connect both signal pins 111. At this time, the two signal pins 111 outside the tank 1 are connected to the controller circuit, which receives a high liquid level signal, controlling the compressor to increase its speed or the electronic expansion valve to increase its opening, thus lowering the liquid level inside the gas-liquid separator. This achieves the function of identifying high liquid level signals.

[0057] This invention positions the oil suction port 92 at the top of the liquid level, ensuring that lubricating oil is always drawn back into the compressor regardless of whether the refrigerant and lubricating oil separate. The invention employs a linkage structure between the oil suction port 92 and the float 8 to guarantee that the oil suction port is always at the top of the liquid level. This invention uses a return oil hose 7 in conjunction with a return oil rigid pipe 6 to connect the oil suction port 92 and the exhaust pipe 4, ensuring that the oil suction port is always connected to the bottom of the exhaust pipe 4 and is unaffected by the liquid level of the refrigerant and lubricating oil mixture. To control the amount of oil returning to the compressor, this invention includes a conical hole (hole structure 95) on the sliding oil suction assembly 9, which is narrower at the top and wider at the bottom. The conical hole fits onto a conical rod 5, which is thinner at the top and thicker at the bottom. The conical rod 5 is connected to a conical rod seat 51 welded to the bottom of the tank body 1 via threads. When the float 8 moves up and down, it drives the sliding oil suction assembly 9 to move up and down along the conical rod 5. Figures 5-6 The diagram illustrates the different clearances between the conical orifice and the conical rod 5 at different liquid levels. The closer to the top of the conical rod 5, the smaller the outer diameter of the conical rod 5, the larger the clearance between the conical rod 5 and the conical orifice, and the larger the flow cross-sectional area of ​​the oil suction inlet. Conversely, the closer to the bottom of the conical rod 5, the larger the outer diameter of the conical rod 5, the smaller the clearance between the conical rod 5 and the conical orifice, and the smaller the flow cross-sectional area of ​​the oil suction inlet. By using different clearances between the conical orifice and the conical rod 5 at different heights, the amount of oil returning through the oil return path can be controlled, achieving the function of more oil returning as the liquid level rises. This achieves the effect of controlling different oil return volumes under different operating conditions. The invention also includes a liquid level height signal triggering device. When the liquid level in the gas-liquid separator reaches a preset warning position, the signal triggering device sends a signal, which, through the air conditioning controller, increases the compressor speed or the opening of the expansion valve to increase the refrigerant flow in the system, thus lowering the liquid level. This prevents a large amount of liquid refrigerant / lubricating oil from flowing directly into the compressor through the exhaust pipe inlet due to excessively high liquid levels, which could cause liquid slugging damage to the compressor.

[0058] As can be seen from the above, this invention controls the amount of oil returning through the oil return hose 7 by causing the gap between the oil suction hole 92 and the cone rod 5 to change as the float 8 moves up and down. This achieves the goal of increasing the amount of oil returning as the liquid level rises, thus fully meeting the lubrication and system performance requirements of the compressor. Furthermore, a liquid level signal triggering device is included to prevent excessive liquid refrigerant from entering the compressor and damaging it due to an excessively high liquid level. In summary, this invention can be used in low-temperature heat pump systems of electric vehicle thermal management systems; it is applicable to all automotive air conditioning systems where refrigerant and lubricating oil are miscible, or where refrigerant and lubricating oil are stratified, but the lubricating oil is on the upper level; it enables the function of increasing oil return as the liquid level increases, ensuring the compressor / refrigerant system guarantees oil return while preventing excessive liquid refrigerant from entering the compressor and affecting system performance; compared to electrically adjusting the oil return, this invention uses all mechanical parts, reducing costs; the liquid level signal triggering device of this invention effectively prevents a large amount of liquid refrigerant from entering the compressor, extending the compressor's service life; the liquid level signal triggering device of this invention has a simple structure, replaces the function of a liquid level sensor, and saves costs.

[0059] In addition, this invention also solves the problem that under low-load heat pump conditions, excessive refrigerant accumulates in the gas-liquid separator, leading to a large amount of liquid refrigerant entering the compressor due to excessively high liquid level. Furthermore, this patent adopts a mechanical structure with a conical rod and a hole structure, which can save costs, and the oil return volume control is continuous and not segmented, making the control of the oil return volume more precise.

[0060] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0061] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A gas-liquid separator that controls the amount of return oil based on a taper rod, characterized by, The utility model relates to a kind of oil return devices of oil tank, including Tank (1), air inlet (2), exhaust port (3), exhaust pipe (4), cone rod (5), oil return hard pipe (6), oil return hose (7), float (8) and sliding oil suction assembly (9); The tank (1) top is equipped with air inlet (2) and exhaust port (3); Evaporated gas-liquid two-phase material enters tank (1) from air inlet (2), liquid material flows down along the inner wall of tank (1), and forms mixed or layered liquid level;Gaseous material enters exhaust pipe (4), and is discharged from exhaust port (3); Oil return hard pipe (6) is connected on exhaust pipe (4), and sliding oil suction assembly (9) is connected with oil return hard pipe (6) through oil return hose (7); Sliding oil suction assembly (9) is connected with float (8); Sliding oil suction assembly (9) includes oil suction hole (92) and hole structure (95), and the oil suction hole (92) is communicated with the hole structure (95); The cone rod (5) is installed in the tank (1), and the upper and lower end surfaces of the cone rod (5) are different in cross-sectional area, and the sliding oil suction assembly (9) is sleeved on the cone rod (5) through the hole structure (95); The oil suction hole (92) can be always in the uppermost layer of the mixed or layered liquid level by the action of the float (8);When the sliding oil suction assembly (9) floats up and down with the float (8), the hole structure (95) moves up and down on the cone rod (5), and the gap between the oil suction hole (92) and the cone rod (5) changes with the up-and-down movement of the sliding oil suction assembly (9), so as to realize the function of controlling the amount of oil return through the gap change between the oil suction hole (92) and the cone rod (5); The hole structure (95) is a tapered hole structure with small upper and large lower.

2. The gas-liquid separator based on taper lever control of return oil amount according to claim 1, characterized by, It also includes a cone rod seat (51), and the cone rod (5) is installed in the tank (1) through the cone rod seat (51).

3. The gas-liquid separator based on taper lever control of return oil amount according to claim 1, characterized by, The sliding oil suction assembly (9) further includes a filter screen (94), and the oil suction hole (92) is provided with the filter screen (94).

4. The gas-liquid separator based on taper lever control of return oil amount according to claim 3, characterized by, The sliding oil suction assembly (9) further includes a nut (93), and the filter screen (94) is fixed on the oil suction hole (92) through the nut (93).

5. The gas-liquid separator based on taper lever control of return oil amount according to claim 4, wherein It also includes a limiting guide rail (10). The sliding oil suction assembly (9) further includes a sliding block (91), and the oil suction hole (92) and the hole structure (95) are arranged on the sliding block (91), and the oil suction hole (92) is connected with the oil return hose (7) through the nut (93). The limiting guide rail (10) is installed in the tank (1), and the sliding block (91) is installed on the limiting guide rail (10), and the limiting guide rail (10) is used to limit the sliding block (91) to move only in the up-and-down direction.

6. The gas-liquid separator based on taper lever control of return oil amount according to claim 5, wherein The upper end and the lower end of the limiting guide rail (10) are both provided with a limiting block, and the limiting block is used to limit the sliding block (91) to move between the upper and lower limiting blocks.

7. The gas-liquid separator based on taper lever control of return oil amount according to claim 1, wherein The end of the oil return hard pipe (6) is provided with a hose guide bracket (12), and enough length of the oil return hose (7) is reserved.

8. The gas-liquid separator based on taper lever control of return oil amount according to claim 1, wherein, It also includes a liquid level signal triggering device (11). The liquid level signal triggering device (11) comprises a signal pin (111), a switch contact (112), a contact spring (114) and a push rod (113) installed on the float (8); the signal pin (111), the switch contact (112) and the contact spring (114) are all installed on the top of the tank body (1), and the number of the signal pins (111) is two; When the liquid level in the gas-liquid separator tank body (1) reaches a preset limit height, the push rod (113) on the float (8) pushes the switch contact (112) to move upward, compresses the contact spring (114), and makes the switch contact (112) connect the two signal pins (111) at the same time, so as to realize the function of identifying the high liquid level signal.

9. The gas-liquid separator based on taper lever control of return oil amount according to claim 1, wherein, The exhaust pipe (4) is a U-shaped pipe.

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