Liquid separator and compressor

Abstract

The utility model discloses a liquid separator and a compressor, the liquid separator comprises a shell, an oil return cavity is formed in the inner side of the shell; the oil return pipe is contained in the oil return cavity, an upper oil return hole and a lower oil return hole are formed in the oil return pipe in the axial direction of the oil return pipe in a spaced mode, the oil return cavity communicates with the interior of the oil return pipe through the upper oil return hole and the lower oil return hole, and the refrigerant circulates in the oil return pipe; and the movable plug is movably arranged on the oil return pipe, and the movable plug is used for moving in the axial direction of the oil return pipe under the action of refrigerant pressure to shield the upper oil return hole or the lower oil return hole, so that one of the upper oil return hole and the lower oil return hole is opened, and the other one of the upper oil return hole and the lower oil return hole is closed. According to the liquid separator, the upper oil return hole and the lower oil return hole can be automatically switched according to different refrigerant pressures under different system working conditions, oil return at positions corresponding to different heights under different working conditions is achieved, all working condition points of comprehensive energy efficiency of the system are effectively considered, and the energy efficiency of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a liquid distributor and a compressor. Background Art

[0002] As air conditioning system energy efficiency upgrades, requirements for air conditioners and compressors are becoming increasingly stringent. The system's comprehensive energy efficiency (APF) is calculated from intermediate cooling, rated cooling, rated heating, intermediate heating, and low-temperature heating. Energy efficiency under different operating conditions significantly impacts system energy efficiency. Different system operating conditions also require different heights for the oil return hole on the compressor's liquid distributor: cooling requires a lower height, while heating requires a higher height. However, the existing compressor's liquid distributor has a fixed height for its oil return, which cannot simultaneously address the energy efficiency requirements under different operating conditions, resulting in the system's energy efficiency failing to meet high-efficiency requirements. Utility Model Content

[0003] Provided are a liquid distributor and a compressor, which solve the problem of low system energy efficiency caused by the fixed oil return height of the existing liquid distributor.

[0004] In a first aspect, an embodiment of the present invention provides a liquid dispenser, comprising:

[0005] a housing having an oil return chamber formed on its inner side;

[0006] An oil return pipe is received in the oil return chamber, and an upper oil return hole and a lower oil return hole are provided in the oil return pipe at intervals along its axial direction. The upper oil return hole and the lower oil return hole connect the oil return chamber with the interior of the oil return pipe, and refrigerant flows in the interior of the oil return pipe;

[0007] A movable plug is movably provided on the oil return pipe, and is used to move along the axial direction of the oil return pipe under the action of the refrigerant pressure to block the upper oil return hole or the lower oil return hole, so that one of the upper oil return hole and the lower oil return hole is opened and the other is closed.

[0008] In the liquid distributor provided in an embodiment of the present invention, the movable plug includes a cylinder and a pressure-bearing part, the cylinder can be movably sleeved on the return oil pipe and abut against the side wall of the return oil pipe, the pressure-bearing part is connected to the cylinder and extends toward the axis of the return oil pipe, wherein the pressure-bearing part is used to drive the cylinder to move axially along the return oil pipe under the action of the refrigerant pressure to cover the upper return oil hole or the lower return oil hole.

[0009] In the liquid dispenser provided in the embodiment of the present invention, the cylinder can be movably sleeved inside the oil return pipe and abut against the inner wall of the oil return pipe.

[0010] In the liquid distributor provided in the embodiment of the present invention, the cylinder can be movably sleeved on the outside of the oil return pipe and abut against the outer side wall of the oil return pipe.

[0011] In the liquid distributor provided in an embodiment of the present invention, the cylinder is provided with a first through hole and a second through hole at intervals along its own axial direction, wherein when the first through hole and the upper oil return hole coincide with each other in the radial direction of the oil return pipe, the second through hole and the lower oil return hole are staggered with each other in the radial direction of the oil return pipe, and when the second through hole and the lower oil return hole coincide with each other in the radial direction of the oil return pipe, the first through hole and the upper oil return hole are staggered with each other in the radial direction of the oil return pipe.

[0012] In the liquid distributor provided in an embodiment of the present invention, the cylinder is provided with a strip-shaped through hole extending in its own axial direction, and the strip-shaped through hole has a first end and a second end which are far away from each other in the axial direction of the oil return pipe, wherein when the first end coincides with the upper oil return hole, the second end and the lower oil return hole are staggered with each other in the axial direction of the oil return pipe, and when the second end coincides with the lower oil return hole, the first end and the upper oil return hole are staggered with each other in the axial direction of the oil return pipe.

[0013] In the liquid separator provided in an embodiment of the present invention, the liquid separator also includes an elastic member, which is arranged on the radially outer side of the cylinder and elastically connected to the inner wall of the return oil pipe, wherein when the cylinder moves axially along the return oil pipe, the elastic member drives the cylinder to rebound axially along the return oil pipe.

[0014] In the liquid dispenser provided in an embodiment of the present invention, a receiving groove is recessed on the radial outer side of the cylinder, and the elastic member is arranged in the receiving groove.

[0015] In the liquid dispenser provided in an embodiment of the present invention, the elastic member is a spring, the spring is sleeved in the receiving groove, and the radial outer side of the spring abuts against the inner side wall of the oil return pipe.

[0016] In a second aspect, an embodiment of the present invention provides a compressor, which includes the liquid separator described in the first aspect.

[0017] The utility model provides a liquid separator and a compressor, the liquid separator includes a shell, an oil return pipe and a movable plug; the shell has an oil return chamber formed on its inner side; the oil return pipe is accommodated in the oil return chamber, and the oil return pipe is provided with an upper oil return hole and a lower oil return hole at intervals along its own axial direction, the upper oil return hole and the lower oil return hole connect the oil return chamber with the interior of the oil return pipe, and the refrigerant flows inside the oil return pipe; the movable plug is movably provided on the oil return pipe, and the movable plug is used to move along the axial direction of the oil return pipe under the action of the refrigerant pressure to block the upper oil return hole or the lower oil return hole, so that one of the upper oil return hole and the lower oil return hole is opened and the other is closed. The liquid distributor provided in the embodiment of the present application is provided with an upper return oil hole and a lower return oil hole at different axial heights on the return oil pipe to connect the return oil chamber on the inner side of the shell with the interior of the return oil pipe, and a movable plug is movably provided on the return oil pipe. The movable plug is moved axially along the return oil pipe under the action of the refrigerant pressure to block the upper return oil hole or the lower return oil hole, so that one of the upper return oil hole and the lower return oil hole is opened and the other is closed. In this way, the upper return oil hole and the lower return oil hole can be automatically switched according to the different refrigerant pressures under different system working conditions, so as to realize oil return at different heights, effectively take into account various working points of the system's comprehensive energy efficiency, and improve the system energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A cross-sectional view of a liquid dispenser provided in an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 A magnified view of part A;

[0021] Figure 3 for Figure 1 A magnified view of part A;

[0022] Figure 4 An exploded view of a liquid dispenser provided in an embodiment of the present utility model;

[0023] Figure 5 A three-dimensional diagram of an oil return pipe provided in an embodiment of the present utility model;

[0024] Figure 6 A three-dimensional diagram of a movable plug and an elastic member provided in an embodiment of the present utility model;

[0025] Figure 7A bottom view of the oil return pipe provided in an embodiment of the present utility model;

[0026] Figure 8 A cross-sectional view of a movable plug provided in an embodiment of the present utility model;

[0027] Figure 9 A cross-sectional view of the oil return pipe and the movable plug provided in an embodiment of the present utility model;

[0028] Figure 10 for Figure 9 A magnified view of part B;

[0029] Figure 11 A cross-sectional view of the movable plug and the oil return pipe provided in an embodiment of the present utility model;

[0030] Figure 12 for Figure 11 Magnified view of part C;

[0031] Figure 13 A front view of the movable plug and the elastic member provided in an embodiment of the present utility model;

[0032] Figure 14 A cross-sectional view of a movable plug and an elastic member provided in an embodiment of the present utility model;

[0033] Figure 15 A front view of a movable plug and a spring provided in an embodiment of the present utility model;

[0034] Figure 16 A cross-sectional view of a movable plug and a spring provided in an embodiment of the present utility model;

[0035] Figure 17 A cross-sectional view of a pressure-bearing portion provided in an embodiment of the present utility model;

[0036] Figure 18 A cross-sectional view of a pressure-bearing portion provided in an embodiment of the present utility model;

[0037] Figure 19 A cross-sectional view of a pressure-bearing portion provided in an embodiment of the present utility model;

[0038] The reference numerals in the figures are:

[0039] 10. Shell; 101. Oil return chamber; 102. Air outlet; 11. Cylinder; 12. Upper cover; 13. Lower cover; 20. Oil return pipe; 21. Upper oil return hole; 22. Lower oil return hole; 30. Movable plug; 31. Pressure-bearing part; 32. Cylinder; 301. First through hole; 302. Second through hole; 303. Strip through hole; 3031. First end; 3032. Second end; 320. Storage groove; 40. Elastic member; 50. Intake pipe; 60. Exhaust pipe. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are 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 creative efforts are within the scope of protection of the present invention.

[0041] Reference Figures 1 to 16 , please refer to Figures 1 to 5 , which shows an embodiment of the liquid separator provided by the utility model. The structure and working principle of the liquid separator are described in detail below with reference to the drawings in the specification. The liquid separator includes a shell 10, an oil return pipe 20 and a movable plug 30. The shell 10 has an oil return chamber 101 formed on its inner side; the oil return pipe 20 is accommodated in the oil return chamber 101, and the oil return pipe 20 is provided with an upper oil return hole 21 and a lower oil return hole 22 along its own axial direction. The upper oil return hole 21 and the lower oil return hole 22 connect the oil return chamber 101 with the interior of the oil return pipe 20, and the refrigerant flows inside the oil return pipe 20; the movable plug 30 is movably provided on the oil return pipe 20, and the movable plug 30 is used to move along the axial direction of the oil return pipe 20 to block the upper oil return hole 21 or the lower oil return hole 22, so that one of the upper oil return hole 21 and the lower oil return hole 22 is opened and the other is closed.

[0042] In specific implementation, Figure 1 and Figure 4As shown, the liquid separator includes a shell 10, an oil return pipe 20 and a movable plug 30. The shell 10 is a closed container structure with a cavity on the inside. The shell 10 is mainly composed of three parts: a cylinder 11, an upper cover 12 and a lower cover 13. The upper cover 12 and the lower cover 13 are respectively connected to the two ends of the cylinder 11 to form a complete shell 10. The oil return chamber 101 is a cavity on the inside of the shell 10. The oil return chamber 101 is mainly used to cooperate with the oil return pipe 20 to separate and collect the mixed oil in the refrigerant. The refrigerant enters the oil return chamber 101 from the intake pipe 50 connected to the upper cover 12 of the shell 10. The refrigerant can collide in the oil return chamber 101 to separate a larger volume of oil, and the separated oil gathers in the oil return chamber 101. The oil return pipe 20 is a hollow tubular structure. The entirety of the oil return pipe 20 is housed in the oil return chamber 101 inside the housing 10. The interior of the oil return pipe 20 is used to circulate refrigerant. After entering the oil return chamber 101, the refrigerant flows through the interior of the oil return pipe 20 and enters the compressor. The oil return pipe 20 is provided with an upper oil return hole 21 and a lower oil return hole 22 spaced apart along its axial direction. The upper oil return hole 21 and the lower oil return hole 22 are through-hole structures on the side wall of the oil return pipe 20. The upper oil return hole 21 and the lower oil return hole 22 are spaced apart in the axial direction of the oil return pipe 20. The upper oil return hole 21 and the lower oil return hole 22 connect the oil return chamber 101 with the interior of the oil return pipe 20. In the axial direction of the oil return pipe 20, the upper oil return hole 21 is located at the top and the lower oil return hole 22 is located at the bottom. The upper oil return hole 21 is higher than the lower oil return hole 22. After the refrigerant is introduced into the oil return chamber 101, a certain volume of oil can be separated. The oil can then enter the interior of the oil return pipe 20 through the upper oil return hole 21 or the lower oil return hole 22 on the oil return pipe 20. Since the lower oil return hole 22 is located below the upper oil return hole 21, during the accumulation of oil in the oil return chamber 101, the oil will first reach the position of the lower oil return hole 22. If there is enough oil, the oil may not exceed the upper oil return hole 21 at a higher position. The movable plug 30 can be movably arranged on the oil return pipe 20, and can be arranged on the inside of the oil return pipe 10 or on the outside of the oil return pipe 20. The movable plug 30 maintains close contact with the side wall of the oil return pipe 20. The movable plug 30 can move along the axial direction of the oil return pipe 20 against the side wall of the oil return pipe 20. The movable plug 30 closes the upper oil return hole 21 or the lower oil return hole 22 by blocking the upper oil return hole 21 or the lower oil return hole 22. In actual applications, when the refrigerant circulates inside the return oil pipe 20, the pressure of the refrigerant in the air-conditioning system is different under different working conditions. Under heating conditions (including intermediate heating, rated heating, and low-temperature heating), the pressure of the refrigerant is greater than that under cooling conditions (including intermediate cooling and rated cooling).The refrigerant pressure acts on the movable plug 30, causing the movable plug 30 to move up and down along the axial direction of the return oil pipe 20. The movable plug 30 is used to open one of the upper return oil hole 21 and the lower return oil hole 22 and close the other, that is, when the movable plug 30 moves to the position of the upper return oil hole 21 along the axial direction of the return oil pipe 20, the upper return oil hole 21 can be opened and the lower return oil hole 22 can be blocked and closed at the same time. When the movable plug 30 moves to the position of the lower return oil hole 22 along the axial direction of the return oil pipe 20, the lower return oil hole 22 can be opened and the upper return oil hole 21 can be blocked and closed at the same time. The direction of movement of the movable plug 30 is determined by the pressure of the refrigerant. When the air-conditioning system is in the cooling condition, the suction pressure of the refrigerant is relatively large under this condition, and the refrigerant pressure borne by the movable plug 30 is relatively large. The movable plug 30 will move downward along the axial direction of the return oil pipe 20 and open the lower return oil hole 22 at a low position. At this time, the upper return oil hole 21 is closed, and only the lower return oil hole 22 connects the return oil cavity 101 with the inside of the return oil pipe 20, realizing the low-position oil return of the lower return oil hole 22 under the cooling condition, thereby improving the energy efficiency under the cooling condition; when the air-conditioning system is in the heating condition, the refrigerant suction pressure is relatively small under this condition, and the refrigerant pressure borne by the movable plug 30 is relatively small. 30 will move upward along the axial direction of the return oil pipe 20 to open the upper return oil hole 21 of the return oil pipe 20. At this time, the lower return oil hole 22 is closed, and only the upper return oil hole 21 connects the return oil chamber 101 with the inside of the return oil pipe 20, so as to realize the high-position oil return of the upper return oil hole 21 during heating operation, thereby improving the energy efficiency under heating operation. Therefore, the different pressures exerted on the movable plug 30 by the different refrigerant suction pressures can effectively control the moving distance of the movable plug 30, control the switching between the upper return oil hole 21 and the lower return oil hole 22, realize the high and low position oil return function, and thus achieve the optimal energy efficiency under different system working conditions, thereby improving the overall energy efficiency of the air-conditioning system.

[0043] The liquid distributor of this embodiment arranges upper oil return holes and lower oil return holes at different heights along the axial direction on the oil return pipe to connect the oil return chamber inside the shell with the inside of the oil return pipe, and the movable plug is movably arranged on the oil return pipe. The movable plug moves axially along the oil return pipe under the action of the refrigerant pressure to block the upper oil return hole or the lower oil return hole, so that one of the upper oil return hole and the lower oil return hole is opened and the other is closed. In this way, the upper oil return hole and the lower oil return hole can be automatically switched according to the different refrigerant pressures under different system working conditions, so as to realize oil return at positions at different heights, effectively taking into account various working points of the system's comprehensive energy efficiency, and improving the system energy efficiency.

[0044] In one embodiment, reference 1 and Figure 2 as well as Figure 6 and Figure 7The movable plug includes a cylinder 32 and a pressure-bearing part 31. The cylinder 32 can be movably sleeved on the return oil pipe 20 and abuts against the side wall of the return oil pipe 20. The pressure-bearing part 31 is connected to the cylinder 32 and extends toward the axis of the return oil pipe 20. The pressure-bearing part 31 is used to drive the cylinder 32 to move axially along the return oil pipe 20 under the action of the refrigerant pressure to block the upper return oil hole 21 or the lower return oil hole 22. In the specific implementation, the movable plug 30 is composed of a cylinder 32 and a pressure-bearing part 31. The cylinder 32 is a cylindrical structure with transparent ends. The cylinder 32 can be movably sleeved on the return oil pipe 20, and the cylinder 32 is attached to the side wall of the return oil pipe 20 and maintains close contact with the side wall of the return oil pipe 20. The cylinder 32 can be designed to be sleeved on the inside of the return oil pipe 20, or it can be designed to be sleeved on the outside of the return oil pipe 20. There is no restriction here. When the cylinder 32 is sleeved on the inside of the return oil pipe 20, the outer wall of the cylinder 32 will be attached to the inner wall of the return oil pipe 20. When the cylinder 32 is sleeved on the outside of the return oil pipe 20, the inner wall of the cylinder 32 will be attached to the outer wall of the return oil pipe 20. The pressure-bearing portion 31 is connected to the barrel 32 and extends toward the axis of the oil return pipe 20. Specifically, the pressure-bearing portion 31 is a flange structure extending from the radially inner side of the barrel 32 toward the axis of the oil return pipe 20. The pressure-bearing portion 31 has a blocking effect on the refrigerant flowing within the oil return pipe 20. In actual use, refrigerant flows within the oil return pipe 20, and the refrigerant pressure acts on the pressure-bearing portion 31 extending toward the axis of the oil return pipe 20. Under the action of the refrigerant pressure, the pressure-bearing portion 31 drives the barrel 32 to move axially along the oil return pipe 20, causing the barrel 32 to block the upper oil return hole 21 or the lower oil return hole 22. Due to the different refrigerant pressures under different system operating conditions, the pressure-bearing portion 31 drives the barrel 32 to move in different directions, thereby achieving switching between the upper oil return hole 21 and the lower oil return hole 22, and realizing oil return at different heights under different system operating conditions, thereby achieving optimal energy efficiency under different system operating conditions, thereby improving the energy efficiency of the air conditioning system.

[0045] Furthermore, if Figures 17 to 19As shown, the cross-section of the pressure-bearing portion 31 in the axial direction of the return oil pipe 20 is a regular pattern. In a specific implementation, the pressure-bearing portion 31 forms a blocking effect on the refrigerant circulating inside the return oil pipe 20. The cross-sectional area of ​​the pressure-bearing portion 31 in the axial direction of the return oil pipe 20 determines the size of the refrigerant pressure borne by the pressure-bearing portion 31, which in turn affects the distance that the cylinder 32 moves axially along the return oil pipe 20. The cross-sectional area of ​​the pressure-bearing portion 31 in the axial direction of the return oil pipe 20 can be specifically designed according to the energy efficiency requirements and usage scenarios of the system. In addition to the cross-sectional area in the axial direction of the return oil pipe 20, the cross-sectional shape of the pressure-bearing portion 31 in the axial direction of the return oil pipe 20 also affects the movement effect of the cylinder 32. The irregular cross-sectional shape will make the flow of the refrigerant uneven, and the refrigerant pressure on the pressure-bearing portion 31 as a whole is also uneven. Therefore, the cross-sectional design of the pressure-bearing portion 31 in the axial direction of the return oil pipe 20 of this embodiment is a regular pattern, that is, the cross-sectional pattern of the pressure-bearing portion 31 in the axial direction of the return oil pipe 20 is a regular and characteristic pattern, such as Figures 17 to 19 By designing the cross section of the pressure receiving portion 31 in the axial direction of the oil return pipe 20 into a regular pattern, the flow of the refrigerant can be made uniform, the refrigerant pressure on the entire pressure receiving portion 31 can also be more uniform, and the movement effect of the cylinder 32 can be made more stable and reliable.

[0046] In one embodiment, referring to Figure 1 and Figure 2 as well as Figure 9 and Figure 10 The cylinder 32 can be movably sleeved inside the oil return pipe 20 and abut against the inner wall of the oil return pipe 20. In a specific implementation, the cylinder 32 is designed to be sleeved inside the oil return pipe 20, with the outer wall of the cylinder 32 abutting against the inner wall of the oil return pipe 20, maintaining close contact with the inner wall of the oil return pipe 20. The outer wall of the oil return pipe 20 forms a guide for the cylinder, and the cylinder 32 can move smoothly along the axial direction of the oil return pipe 20, covering the upper oil return hole 21 or the lower oil return hole 22 on the oil return pipe 20 inside the oil return pipe 20, realizing the switching between the upper oil return hole 21 and the lower oil return hole 22, and realizing oil return at different heights under different system operating conditions, thereby achieving the optimal energy efficiency under different system operating conditions, thereby improving the energy efficiency of the air-conditioning system.

[0047] In one embodiment, referring to Figure 11 and Figure 12The cylinder 32 can be movably sleeved on the outside of the oil return pipe 20 and abut against the outer wall of the oil return pipe 20. In a specific embodiment, the cylinder 32 is designed to be sleeved on the outside of the oil return pipe 20, and the inner wall of the cylinder 32 abuts against the outer wall of the oil return pipe 20, maintaining close contact with the outer wall of the oil return pipe 20. The inner wall of the oil return pipe 20 guides the cylinder, and the cylinder 32 can move smoothly along the axial direction of the oil return pipe 20, covering the upper oil return hole 21 or the lower oil return hole 22 on the oil return pipe 20 on the outside of the oil return pipe 20, realizing the switching between the upper oil return hole 21 and the lower oil return hole 22, and realizing oil return at different heights under different system operating conditions, thereby achieving the optimal energy efficiency under different system operating conditions, thereby improving the energy efficiency of the air-conditioning system.

[0048] In one embodiment, referring to Figure 1 and Figure 2 as well as Figure 11 and Figure 12The cylindrical body 32 is provided with a first through hole 301 and a second through hole 302 at intervals along its axial direction. When the first through hole 301 and the upper oil return hole 21 coincide with each other in the radial direction of the oil return pipe 20, the second through hole 302 and the lower oil return hole 22 are offset from each other in the radial direction of the oil return pipe 20. When the second through hole 302 and the lower oil return hole 22 coincide with each other in the radial direction of the oil return pipe 20, the first through hole 301 and the upper oil return hole 21 are offset from each other in the radial direction of the oil return pipe 20. In a specific embodiment, the cylindrical body 32 is provided with the first through hole 301 and the second through hole 302 at intervals along its axial direction. Both the first through hole 301 and the second through hole 302 are through hole structures on the side wall of the cylindrical body 32. In the axial direction of the oil return pipe 20, the distance between the center of the first through hole 301 and the center of the second through hole 302 is smaller than the distance between the center of the upper oil return hole 21 and the center of the lower oil return hole 22. When the first through hole 301 and the upper oil return hole 21 coincide with each other in the radial direction of the oil return pipe 20, the second through hole 302 and the lower oil return hole 22 remain dislocated from each other in the radial direction of the oil return pipe 20. At this time, the upper oil return hole 21 on the oil return pipe 20 is opened and the lower oil return hole 22 is blocked and closed, thereby realizing high-position oil return of the upper oil return hole 21; when the second through hole 302 and the lower oil return hole 22 coincide with each other in the radial direction of the oil return pipe 20, the first through hole 301 and the upper oil return hole 21 remain dislocated from each other in the radial direction of the oil return pipe 20. At this time, the lower oil return hole 22 on the oil return pipe 20 is opened and the upper oil return hole 21 is blocked and closed, thereby realizing low-position oil return of the lower oil return hole 22. In actual application, under different working conditions of the air-conditioning system, the pressure of the refrigerant is different. When the air-conditioning system is in the cooling working condition, the suction pressure of the refrigerant is relatively large, and the pressure-bearing part 31 drives the cylinder 32 to move downward along the axial direction of the oil return pipe 20, so that the second through hole 302 and the lower oil return hole 22 coincide with each other in the radial direction of the oil return pipe 20. At this time, the first through hole 301 and the upper oil return hole 21 are dislocated from each other in the radial direction of the oil return pipe 20, and only the lower oil return hole 22 is opened to connect the oil return cavity 101 with the inside of the oil return pipe 20, realizing the low position oil return of the lower oil return hole 22. Under the cooling working condition, Energy efficiency is improved; when the air conditioning system is in heating mode, the refrigerant suction pressure is relatively low, and the pressure on the pressure-bearing part 31 is relatively low. The pressure-bearing part 31 will drive the cylinder 32 to move upward along the axial direction of the oil return pipe 20, so that the first through hole 301 and the upper oil return hole 21 coincide with each other in the radial direction of the oil return pipe 20. At this time, the second through hole 302 and the lower oil return hole 22 are offset from each other in the radial direction of the oil return pipe 20. Only the upper oil return hole 21 is opened to connect the oil return chamber 101 with the interior of the oil return pipe 20, realizing high-position oil return of the upper oil return hole 21, and improving energy efficiency under heating mode. Overall, the first through hole 301 and the second through hole 302 are used to switch the open and closed states of the upper oil return hole 21 and the lower oil return hole 22 under different operating conditions, thereby optimizing energy efficiency under different operating conditions.

[0049] In one embodiment, referring to Figures 8 to 12The cylinder 32 is provided with a strip-shaped through hole 303 extending in its own axial direction, and the strip-shaped through hole 303 has a first end 3031 and a second end 3032 which are far away from each other in the axial direction of the oil return pipe 20, wherein when the first end 3031 coincides with the upper oil return hole 21, the second end 3032 and the lower oil return hole 22 are staggered with each other in the axial direction of the oil return pipe 20, and when the second end 3032 coincides with the lower oil return hole 22, the first end 3031 and the upper oil return hole 21 are staggered with each other in the axial direction of the oil return pipe 20. In a specific implementation, a strip-shaped through hole 303 extending in its own axial direction is provided on the cylinder 32. The strip-shaped through hole 303 has a first end 3031 and a second end 3032 that are far away from each other in the axial direction of the oil return pipe 20. In the axial direction of the oil return pipe 20, the distance between the first end 3031 and the second end 3032 of the strip-shaped through hole 303 is designed to be smaller than the distance between the center of the upper oil return hole 21 and the center of the lower oil return hole 22. When the first end 3031 of the strip through hole 303 and the upper oil return hole 21 coincide with each other in the radial direction of the oil return pipe 20, the second end 3032 of the strip through hole 303 and the lower oil return hole 22 remain dislocated with each other in the radial direction of the oil return pipe 20. At this time, the upper oil return hole 21 on the oil return pipe 20 is opened and the lower oil return hole 22 is blocked and closed, thereby realizing high-position oil return of the upper oil return hole 21; when the second end 3032 of the strip through hole 303 and the lower oil return hole 22 coincide with each other in the radial direction of the oil return pipe 20, the first end 3031 of the strip through hole 303 and the upper oil return hole 21 remain dislocated with each other in the radial direction of the oil return pipe 20. At this time, the lower oil return hole 22 on the oil return pipe 20 is opened and the upper oil return hole 21 is blocked and closed, thereby realizing low-position oil return of the lower oil return hole 22. In actual application, under different working conditions of the air-conditioning system, the pressure of the refrigerant is different. When the air-conditioning system is in the cooling working condition, the suction pressure of the refrigerant is relatively large, and the pressure-bearing part 31 drives the cylinder to move downward along the axial direction of the oil return pipe 20, so that the second end 3032 of the strip through hole 303 and the lower oil return hole 22 coincide with each other in the radial direction of the oil return pipe 20. At this time, the first end 3031 of the strip through hole 303 and the upper oil return hole 21 are dislocated from each other in the radial direction of the oil return pipe 20, and only the lower oil return hole 22 opens the return oil cavity 101 to communicate with the inside of the oil return pipe 20, realizing the low-position oil return of the lower oil return hole 22. Energy efficiency is improved; when the air-conditioning system is in heating condition, the refrigerant suction pressure is relatively small, and the pressure on the pressure-bearing part 31 is relatively small. The pressure-bearing part 31 drives the cylinder 32 to move upward along the axial direction of the return oil pipe 20, so that the first end 3031 of the strip through hole 303 coincides with the upper return oil hole 21 in the radial direction of the return oil pipe 20. At this time, the second end 3032 of the strip through hole 303 and the lower return oil hole 22 are offset from each other in the radial direction of the return oil pipe 20. Only the upper return oil hole 21 is opened to connect the return oil chamber 101 with the inside of the return oil pipe 20, thereby realizing the high-position oil return of the upper return oil hole 21, and the energy efficiency under heating condition is improved.Overall, the strip-shaped through hole 303 is used to realize the switching of the open and closed states between the upper oil return hole 21 and the lower oil return hole 22 under different working conditions, thereby achieving energy efficiency optimization under different working conditions.

[0050] In one embodiment, referring to Figure 2 、 Figure 13 as well as Figure 14 The liquid distributor further includes an elastic member 40, which is disposed radially outwardly of the cylinder 32 and elastically connected to the inner wall of the oil return pipe 20. When the cylinder 32 moves axially along the oil return pipe 20, the elastic member 40 drives the cylinder 32 to rebound axially along the oil return pipe 20. In a specific implementation, the liquid distributor further includes the elastic member 40, which has elastic properties and can be made of an elastic material such as sponge or rubber. The elastic member 40 is integrally arranged in a ring on the radially outer side of the cylinder 32, and surrounds the circumference of the cylinder 32 as a whole. The elastic member 40 is elastically connected to the inner wall of the return oil pipe 20. When the pressure-bearing portion 31 is driven by the refrigerant pressure to move the cylinder 32 along the axial direction of the return oil pipe 20, the elastic member 40 as a whole undergoes elastic deformation and generates elastic force. The elastic force generated by the elastic member 40 causes the cylinder 32 to rebound along the axial direction of the return oil pipe 20, thereby realizing the automatic return of the cylinder 32 of the movable plug 30. When the refrigerant pressure changes, the position of the cylinder 32 of the movable plug 30 can be adjusted promptly and quickly through the elastic member 40.

[0051] Further, refer to Figures 14 to 16 The cylindrical body 32 is provided with a recessed receiving groove 320 on the radially outer side, and the elastic member 40 is disposed in the recessed receiving groove 320. In a specific embodiment, the cylindrical body 32 is provided with a recessed receiving groove 320 on the radially outer side. The receiving groove 320 is an annular groove structure provided in an annular manner on the radially outer surface of the cylindrical body 32. Most of the elastic member 40 is disposed in the receiving groove 320, with a small portion protruding outside the receiving groove 320 to elastically connect with the inner sidewall of the oil return pipe 20. By disposing the elastic member 40 in the receiving groove 320 on the radially outer side of the cylindrical body 32, the elastic member 40 can be designed to be thicker as a whole. Under the premise of meeting the rebound requirements of the cylindrical body 32 of the movable plug 30, the elastic member 40 can be prevented from being too large and affecting the gap between the inner sidewall of the movable plug 30 and the oil return pipe 20.

[0052] Further, refer to Figure 2 、 Figure 15 as well as Figure 16The elastic member 40 is a spring that is sleeved within the receiving groove 320 and has its radially outer side abutting against the inner wall of the oil return pipe 20. Specifically, the elastic member 40 is a spring whose overall length is less than or equal to the axial width of the receiving groove 320 in the oil return pipe 20. The spring is entirely sleeved within the receiving groove 320 on the barrel 32. The outer diameter of the spring is slightly larger than the inner diameter of the oil return pipe 20, so that the radially outer side of the spring abuts against the inner wall of the oil return pipe 20, maintaining elastic contact and thereby engaging the spring with the inner wall of the oil return pipe 20. When the pressure-bearing portion 31 drives the cylinder 32 to move axially along the oil return pipe 20, since the spring is accommodated in the receiving groove 320, the two opposite groove walls of the receiving groove 320 in the axial direction of the oil return pipe 20 form stops for the two ends of the spring respectively. The spring will be compressed as the cylinder 32 moves, and then generate elastic force to force the cylinder 32 as a whole to rebound in the direction opposite to the original moving direction. The spring can provide a stable elastic force to adjust the position of the cylinder 32, making the rebound of the cylinder 32 more stable. At the same time, the spring is not prone to elastic fatigue after repeated use, and has a longer service life.

[0053] In one embodiment, referring to Figures 1 to 4 , please refer to 3 and Figure 4The bottom of the shell 10 is provided with an air outlet 102. The oil return pipe 20 is vertically arranged in the oil return chamber 101 and its bottom end is connected to the air outlet 102. The air outlet 102 communicates with the interior of the oil return pipe 20. The distance from the center of the upper oil return hole 21 to the air outlet 102 is 65 mm, and the distance from the center of the lower oil return hole 22 to the air outlet 102 is 20 mm. In a specific embodiment, the air outlet 102 is provided at the bottom of the shell 10. The air outlet 102 is specifically an opening structure provided in the lower cover 13 of the shell 10. The oil return pipe 20 is vertically arranged in the oil return chamber 101 as a whole. The bottom end of the oil return pipe 20 is connected to the air outlet 102. The air outlet 102 is mainly used to connect to the exhaust pipe 60, thereby passing the refrigerant flowing in the oil return pipe 20 into the compressor through the exhaust pipe 60. In this embodiment, the distance from the center of the upper oil return hole 21 to the air outlet 102 is designed to be 65 mm, and the distance from the center of the lower oil return hole 22 to the air outlet 102 is designed to be 20 mm. The upper oil return hole 21 and the lower oil return hole 22 are separated by 45 mm. The refrigerant pressure acts on the movable plug 30 to move the movable plug 30 up and down along the oil return pipe 20. When the movable plug 30 opens the upper oil return hole 21, the upper oil return hole 21 at a height of 65 mm from the air outlet 102 performs high-position oil return, which can meet the energy efficiency requirement of high-position oil return in heating conditions; when the movable plug 30 opens the lower oil return hole 22, the lower oil return hole 22 at a height of 20 mm from the air outlet 102 performs low-position oil return, which can meet the energy efficiency requirement of low-position oil return in cooling conditions. The heights of the upper and lower oil return holes 21, 22 designed by the above numerical values ​​can reasonably optimize the system energy efficiency under different system conditions.

[0054] In one embodiment, the diameters of the upper oil return hole 21 and the lower oil return hole 22 are both 0.8 mm. In a specific implementation, the upper oil return hole 21 and the lower oil return hole 22 are both designed as circular through-hole structures, and their diameters are designed to be equal. In this embodiment, the diameters of both the upper oil return hole 21 and the lower oil return hole 22 are designed to be 0.8 mm. This single through-hole structure can meet the high-efficiency oil return volume requirements under corresponding system operating conditions, allowing for reasonable optimization of system energy efficiency under different system operating conditions.

[0055] In one embodiment, a compressor is provided that utilizes the liquid separator described in the above embodiment. The liquid separator is connected to the compressor's air inlet via an exhaust pipe 60. The liquid separator is used to separate gas and liquid from the refrigerant exiting the evaporator in an air conditioning refrigeration system, removing any large amounts of oil mixed in the refrigerant, thereby enabling more efficient use of the refrigerant. Since the specific structure of the liquid separator has been described in detail in the above embodiment, it will not be repeated here for the sake of brevity.

[0056] The compressor in this embodiment adopts the liquid distributor provided by the present invention, so the system energy efficiency under different working conditions is optimized and the performance of the compressor is better.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A liquid dispenser, characterized in that: include: a housing having an oil return chamber formed on its inner side; An oil return pipe is received in the oil return chamber, and an upper oil return hole and a lower oil return hole are provided in the oil return pipe at intervals along its axial direction. The upper oil return hole and the lower oil return hole connect the oil return chamber with the interior of the oil return pipe, and refrigerant flows in the interior of the oil return pipe; A movable plug is movably provided on the oil return pipe, and is used to move along the axial direction of the oil return pipe under the action of the refrigerant pressure to block the upper oil return hole or the lower oil return hole, so that one of the upper oil return hole and the lower oil return hole is opened and the other is closed.

2. The liquid dispenser according to claim 1, characterized in that The movable plug includes a cylinder and a pressure-bearing part. The cylinder can be movably sleeved on the return oil pipe and abut against the side wall of the return oil pipe. The pressure-bearing part is connected to the cylinder and extends toward the axis of the return oil pipe. The pressure-bearing part is used to drive the cylinder to move axially along the return oil pipe under the action of the refrigerant pressure to cover the upper return oil hole or the lower return oil hole.

3. The liquid dispenser according to claim 2, characterized in that The cylinder is movably sleeved inside the oil return pipe and abuts against the inner wall of the oil return pipe.

4. The liquid dispenser according to claim 2, characterized in that The cylinder is movably sleeved on the outside of the oil return pipe and abuts against the outer side wall of the oil return pipe.

5. The liquid dispenser according to claim 3 or 4, characterized in that: The cylinder is provided with a first through hole and a second through hole at intervals along its axial direction, wherein when the first through hole and the upper oil return hole coincide with each other in the radial direction of the oil return pipe, the second through hole and the lower oil return hole are staggered with each other in the radial direction of the oil return pipe, and when the second through hole and the lower oil return hole coincide with each other in the radial direction of the oil return pipe, the first through hole and the upper oil return hole are staggered with each other in the radial direction of the oil return pipe.

6. The liquid dispenser according to claim 3 or 4, characterized in that: The cylinder is provided with a strip-shaped through hole extending in its own axial direction, and the strip-shaped through hole has a first end and a second end which are far away from each other in the axial direction of the oil return pipe, wherein when the first end coincides with the upper oil return hole, the second end and the lower oil return hole are staggered with each other in the axial direction of the oil return pipe, and when the second end coincides with the lower oil return hole, the first end and the upper oil return hole are staggered with each other in the axial direction of the oil return pipe.

7. The liquid dispenser according to claim 3, characterized in that The liquid distributor also includes an elastic member, which is annularly arranged on the radially outer side of the cylinder and elastically connected to the inner wall of the oil return pipe. When the cylinder moves axially along the oil return pipe, the elastic member drives the cylinder to rebound axially along the oil return pipe.

8. The liquid dispenser according to claim 7, characterized in that A receiving groove is concavely provided on the radial outer side of the cylinder, and the elastic member is arranged in the receiving groove.

9. The liquid dispenser according to claim 8, characterized in that The elastic member is a spring, which is sleeved in the receiving groove and the radial outer side of the spring abuts against the inner side wall of the oil return pipe.

10. A compressor, characterized in that: The liquid dispenser comprises the liquid dispenser according to any one of claims 1 to 9.

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