Vertical liquid accumulator and compressor
By setting up an upper oil return hole and a lower oil return hole on the outlet pipe of the reservoir, the problem of refrigerant accumulation in the reservoir under low temperature conditions is solved, the refrigerant circulation volume and COP are improved, and the system performance is improved.
Patent Information
- Application Number
- CN202421829712.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The liquid reservoir is prone to accumulate liquid phase refrigerant under low-temperature heating and intermediate refrigeration conditions, resulting in a decrease in system performance efficiency and a decrease in low-frequency COP.
The upper oil return hole and the lower oil return hole are respectively provided on the outlet pipe inside the reservoir housing, and the area of the upper oil return hole is greater than or equal to the area of the lower oil return hole to control the circulation amount and humidity of the refrigerant.
It effectively increases the refrigerant circulation volume under low-temperature heating conditions, and improves the COP under low-temperature intermediate cooling conditions, improving system performance.
Smart Images
Figure CN222895355U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, in particular to a vertical liquid storage device and a compressor. Background Art
[0002] The working principle of the rotary compressor is to use a slider to divide the cylinder into an intake chamber and an exhaust chamber. When the motor is powered on, the stator coil generates an electromagnetic field, and the rotor cuts the magnetic lines to generate power to drive the crankshaft of the pump body to rotate, causing the piston to rotate in the cylinder to compress the refrigerant. Under the action of the crankshaft, the volume of the intake and exhaust chambers is constantly changed, sucking in low-temperature and low-pressure gaseous refrigerant, compressing it into high-temperature and high-pressure gaseous refrigerant and then discharging it from the pump body, and the cycle continues.
[0003] With the expansion of compressor usage scenarios, the use of products such as dehumidifiers and air conditioners is increasingly tending towards miniaturized design, making the size of compressors and liquid reservoirs smaller and smaller, and system matching more and more refined. Among them, the liquid reservoir needs to take into account the functional design of oil return lubrication, and generally an oil return hole is set below the inner tube of the liquid reservoir. However, the liquid reservoir is prone to accumulate a large amount of liquid refrigerant in conditions with large and small refrigerant circulation volumes; specifically, in low-temperature heating conditions, the limited air intake volume can easily lead to ineffective system performance efficiency; and in low-temperature intermediate refrigeration conditions, the humidity of the circulating refrigerant increases due to the entry of liquid refrigerant, which can easily lead to a decrease in low-frequency COP. Utility Model Content
[0004] Based on this, the purpose of the utility model is to overcome the shortcomings of the prior art and provide a vertical liquid reservoir and a compressor. According to the vertical liquid reservoir and the compressor of the embodiments of the utility model, an upper oil return hole and a lower oil return hole are respectively provided on the outlet pipe inside the liquid reservoir shell, which can effectively increase the circulation volume during low-temperature heating conditions and improve the COP during low-temperature intermediate refrigeration conditions.
[0005] In order to achieve the above-mentioned purpose, the first aspect of the embodiment of the utility model provides a vertical liquid reservoir, including a liquid reservoir shell, an inlet pipe, and an outlet pipe; the liquid reservoir shell is an internal hollow cavity structure, the inlet pipe is arranged at the upper end of the liquid reservoir shell, and the inlet pipe is connected to the interior of the liquid reservoir shell; the outlet pipe is penetrated from the lower end of the liquid reservoir shell into the interior of the liquid reservoir shell, and the part of the outlet pipe extending into the liquid reservoir shell is provided with an upper oil return hole and a lower oil return hole at intervals along the axial direction, the height of the upper oil return hole is higher than the height of the lower oil return hole, and the upper oil return hole can connect the interior of the liquid reservoir shell and the interior of the outlet pipe, and the lower oil return hole can connect the interior of the liquid reservoir shell and the interior of the outlet pipe; the opening area of the upper oil return hole is S1, and the opening area of the lower oil return hole is S2, S1≥S2.
[0006] Therefore, according to the vertical liquid reservoir of the embodiment of the utility model, an upper oil return hole and a lower oil return hole are respectively provided on the outlet pipe inside the liquid reservoir shell, and the area of the upper oil return hole is greater than or equal to the area of the lower oil return hole; in this way, under the working conditions of small circulation volume such as low-temperature intermediate refrigeration, the liquid level of the liquid-phase refrigerant inside the liquid reservoir shell is low and cannot submerge the upper oil return hole. The liquid-phase refrigerant can only enter the outlet pipe through the lower oil return hole with a smaller area, and the gas-phase refrigerant can enter the outlet pipe through the upper oil return hole with a larger area, so as to achieve the purpose of reducing the liquid-phase refrigerant entering the outlet pipe while increasing the gas-phase refrigerant entering the outlet pipe, thereby effectively improving the COP of the system under the low-temperature intermediate refrigeration working condition; and under the working conditions of large circulation volume such as low-temperature heating, the liquid level of the liquid-phase refrigerant inside the liquid reservoir shell is high and submerges the upper oil return hole. The amount of liquid-phase refrigerant entering the outlet pipe can be further increased through the upper oil return hole with a larger area, thereby effectively increasing the refrigerant circulation volume under the low-temperature heating working condition, thereby improving the system performance of the whole machine.
[0007] As an implementation mode, the axial length of the portion of the outlet pipe extending into the reservoir housing is L, the axial distance from the upper oil return hole to the lower end port of the reservoir housing is H, and 0.6L≤H<L.
[0008] As an implementation manner, the axial distance from the lower oil return hole to the lower end port of the reservoir housing is h, 0<h≤0.3L.
[0009] As an implementation manner, the number of the upper oil return holes is n, 1≤n≤3.
[0010] As an implementation manner, the number of the lower oil return holes is 1 or 2.
[0011] As an embodiment, a partition is provided inside the reservoir housing, the partition is sleeved on the outer circumference of the outlet pipe, and the partition is located between the upper oil return hole and the lower oil return hole.
[0012] As an implementation manner, the partition is an annular structure, and is provided with through holes penetrating the upper and lower end surfaces thereof.
[0013] As an implementation manner, a filter element is disposed inside the liquid reservoir housing, and the filter element is located between the inlet pipe and the outlet pipe.
[0014] The second aspect of the embodiment of the utility model provides a compressor, comprising a vertical liquid accumulator of any of the above embodiments. According to the compressor of the embodiment of the utility model, by respectively providing an upper oil return hole and a lower oil return hole on the outlet pipe inside the liquid accumulator shell, the circulation volume in low-temperature heating conditions and the COP in low-temperature intermediate cooling conditions can be effectively increased.
[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is one of the cross-sectional schematic diagrams of the vertical liquid storage device according to an embodiment of the utility model;
[0017] Figure 2 for Figure 1 An enlarged schematic diagram of section A is shown;
[0018] Figure 3 for Figure 1 An enlarged schematic diagram of portion B is shown;
[0019] Figure 4 It is a cross-sectional schematic diagram of the vertical liquid storage device of the embodiment of the utility model in the low-temperature intermediate refrigeration working condition;
[0020] Figure 5 It is a cross-sectional schematic diagram of the vertical liquid storage device of the embodiment of the utility model in the low-temperature heating condition;
[0021] Figure 6 This is the second cross-sectional schematic diagram of the vertical liquid storage container according to the embodiment of the utility model.
[0022] Description of reference numerals:
[0023] 10. Liquid storage tank housing; 20. Inlet pipe; 30. Outlet pipe; 31. Upper oil return hole; 32. Lower oil return hole; 40. Partition; 50. Filter element; 60. Liquid refrigerant. DETAILED DESCRIPTION
[0024] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention.
[0025] With the expansion of compressor usage scenarios, the use of products such as dehumidifiers and air conditioners is increasingly tending towards miniaturized design, making the size of compressors and liquid reservoirs smaller and smaller, and system matching more and more refined. Among them, the liquid reservoir needs to take into account the functional design of oil return lubrication, and generally an oil return hole is set below the inner tube of the liquid reservoir. However, the liquid reservoir is prone to accumulate a large amount of liquid refrigerant in conditions with large and small refrigerant circulation volumes; specifically, in low-temperature heating conditions, the limited air intake volume can easily lead to ineffective system performance efficiency; and in low-temperature intermediate refrigeration conditions, the humidity of the circulating refrigerant increases due to the entry of liquid refrigerant, which can easily lead to a decrease in low-frequency COP.
[0026] In view of this, an embodiment of the utility model provides a vertical liquid reservoir and a compressor. According to the vertical liquid reservoir and the compressor of the embodiment of the utility model, an upper oil return hole 31 and a lower oil return hole 32 are respectively provided on the outlet pipe 30 inside the liquid reservoir shell 10, which can effectively increase the circulation volume during low-temperature heating conditions and improve the COP during low-temperature intermediate refrigeration conditions.
[0027] See also Figures 1 to 6 ; The first aspect of the embodiment of the utility model provides a vertical liquid reservoir, including a liquid reservoir shell 10, an inlet pipe 20, and an outlet pipe 30; the liquid reservoir shell 10 is an internal hollow cavity structure, the inlet pipe 20 is arranged at the upper end of the liquid reservoir shell 10, and the inlet pipe 20 is connected to the interior of the liquid reservoir shell 10; the outlet pipe 30 is penetrated from the lower end of the liquid reservoir shell 10 into the interior of the liquid reservoir shell 10, and the part of the outlet pipe 30 extending into the liquid reservoir shell 10 is provided with an upper oil return hole 31 and a lower oil return hole 32 at intervals along the axial direction, the height of the upper oil return hole 31 is higher than the height of the lower oil return hole 32, and the upper oil return hole 31 can connect the interior of the liquid reservoir shell 10 and the interior of the outlet pipe 30, and the lower oil return hole 32 can connect the interior of the liquid reservoir shell 10 and the interior of the outlet pipe 30; the opening area of the upper oil return hole 31 is S1, and the opening area of the lower oil return hole 32 is S2, S1≥S2.
[0028] Therefore, according to the vertical liquid reservoir of the embodiment of the utility model, an upper oil return hole 31 and a lower oil return hole 32 are respectively provided on the outlet pipe 30 inside the liquid reservoir shell 10, and the area of the upper oil return hole 31 is greater than or equal to the area of the lower oil return hole 32; in this way, under the working conditions of low-temperature intermediate refrigeration and other conditions with small circulation volume, the liquid level of the liquid-phase refrigerant 60 inside the liquid reservoir shell 10 is low and cannot submerge the upper oil return hole 31. The liquid-phase refrigerant 60 can only enter the outlet pipe 30 through the lower oil return hole 32 with a smaller area, while the gas-phase refrigerant can enter the outlet pipe 30 through the upper oil return hole 32 with a larger area. The hole 31 enters the outlet pipe 30 to reduce the amount of liquid-phase refrigerant 60 entering the outlet pipe 30 while increasing the amount of gas-phase refrigerant entering the outlet pipe 30, thereby effectively improving the COP of the system under low-temperature intermediate refrigeration conditions; and under conditions with large circulation volume such as low-temperature heating, the liquid level of the liquid-phase refrigerant 60 inside the liquid storage tank shell 10 is relatively high and submerges the upper return oil hole 31. The upper return oil hole 31 with a larger area can further increase the amount of liquid-phase refrigerant 60 entering the outlet pipe 30, thereby effectively increasing the refrigerant circulation volume under low-temperature heating conditions, thereby improving the system performance of the whole machine.
[0029] It can be understood that the axial direction of the reservoir housing 10 of the embodiment of the utility model is consistent with the vertical direction, the inlet pipe 20 extends downward from the upper end of the reservoir housing 10 into the interior of the reservoir housing 10, the outlet pipe 30 extends upward from the lower end of the reservoir housing 10 into the interior of the reservoir housing 10, and the end of the inlet pipe 20 extending into the reservoir housing 10 and the end of the outlet pipe 30 extending into the reservoir housing 10 are spaced from each other. In addition, the upper oil return hole 31 and the lower oil return hole 32 of the embodiment of the utility model are respectively opened through the radial direction of the outlet pipe 30.
[0030] like Figure 4 As shown, Figure 4 It is a cross-sectional schematic diagram of the vertical liquid storage device of the embodiment of the utility model in the low-temperature intermediate refrigeration condition. In the low-temperature intermediate refrigeration condition, the liquid level of the liquid phase refrigerant 60 inside the liquid storage device shell 10 is relatively low. At this time, the liquid phase refrigerant 60 floods the lower oil return hole 32, but cannot flood the upper oil return hole 31. The liquid phase refrigerant 60 can only enter the outlet pipe 30 through the lower oil return hole 32 with a smaller area, while the gas phase refrigerant can enter the outlet pipe 30 through the upper oil return hole 31 with a larger area. Therefore, according to the vertical liquid storage device of the embodiment of the utility model, in the low-temperature intermediate refrigeration condition, the purpose of reducing the liquid phase refrigerant 60 entering the outlet pipe 30 and increasing the gas phase refrigerant entering the outlet pipe 30 can be achieved, thereby effectively improving the COP of the system in the low-temperature intermediate refrigeration condition.
[0031] like Figure 5 As shown, Figure 5 The cross-sectional schematic diagram of the vertical liquid storage device of the embodiment of the utility model in the low-temperature heating condition. In the low-temperature heating condition, the liquid level of the liquid phase refrigerant 60 inside the liquid storage device housing 10 is relatively high. At this time, the liquid phase refrigerant 60 simultaneously submerges the upper oil return hole 31 and the lower oil return hole 32. In this way, the liquid phase refrigerant 60 can enter the outlet pipe 30 from the upper oil return hole 31 and the lower oil return hole 32 at the same time, thereby effectively increasing the circulation amount of the liquid phase refrigerant 60. Therefore, according to the vertical liquid storage device of the embodiment of the utility model, in the low-temperature heating condition, the circulation amount of the liquid phase refrigerant 60 can be greatly increased, thereby improving the system performance of the whole machine.
[0032] In some embodiments of the present invention,
[0033] like Figure 6 As shown, the axial length of the portion of the outlet pipe 30 extending into the reservoir housing 10 is L, and the axial distance from the upper oil return hole 31 to the lower end port of the reservoir housing 10 is H, 0.6L≤H<L. In addition, the axial distance from the lower oil return hole 32 to the lower end port of the reservoir housing 10 is h, 0<h≤0.3L.
[0034] It can be understood that, in these embodiments, by limiting the axial positions of the upper oil return hole 31 and the lower oil return hole 32, the lower oil return hole 32 is positioned close to the lower end of the portion of the outlet pipe 30 extending into the reservoir housing 10, and the upper oil return hole 31 is positioned close to the upper end of the portion of the outlet pipe 30 extending into the reservoir housing 10, so that the design of the upper oil return hole 31 and the lower oil return hole 32 is more reasonable.
[0035] In some embodiments of the present invention,
[0036] The number of the upper oil return holes 31 is n, 1≤n≤3, and the number of the lower oil return holes 32 is 1 or 2. It can be understood that in these embodiments, the total area of the upper oil return holes 31 is greater than or equal to the total area of the lower oil return holes 32.
[0037] In some embodiments of the present invention,
[0038] A partition 40 is provided inside the reservoir housing 10, and the partition 40 is sleeved on the outer periphery of the outlet pipe 30, and the partition 40 is located between the upper oil return hole 31 and the lower oil return hole 32. The partition 40 is an annular structure, and a through hole penetrating the upper and lower end surfaces of the partition 40 is provided on the partition 40. In addition, a filter 50 is provided inside the reservoir housing 10, and the filter 50 is located between the inlet pipe 20 and the outlet pipe 30.
[0039] Reference below Figures 1 to 6 A liquid reservoir according to a specific embodiment of the present invention is described in detail. It is worth noting that the following description is merely an exemplary description and cannot be construed as a limitation to the present invention.
[0040] The vertical liquid reservoir of this embodiment includes a liquid reservoir housing 10, an inlet pipe 20, and an outlet pipe 30; the liquid reservoir housing 10 is a hollow cavity structure, the inlet pipe 20 is arranged at the upper end of the liquid reservoir housing 10, and the inlet pipe 20 is connected to the interior of the liquid reservoir housing 10; the outlet pipe 30 is penetrated from the lower end of the liquid reservoir housing 10 into the interior of the liquid reservoir housing 10, and the portion of the outlet pipe 30 extending into the liquid reservoir housing 10 is provided with an upper oil return hole 31 and a lower oil return hole 32 at intervals along the axial direction. The upper oil return hole 31 is higher than the lower oil return hole 32, and the upper oil return hole 31 can communicate with the interior of the reservoir housing 10 and the interior of the outlet pipe 30, and the lower oil return hole 32 can communicate with the interior of the reservoir housing 10 and the interior of the outlet pipe 30; wherein, the number of the upper oil return hole 31 of the present embodiment is 1, the number of the lower oil return hole 32 is 1, the opening area of the upper oil return hole 31 is S1, the opening area of the lower oil return hole 32 is S2, and S1=S2.
[0041] Among them, the axial length L of the part of the outlet pipe 30 of this embodiment extending into the reservoir housing 10 is four-fifths of the axial length of the reservoir housing 10, the axial distance H from the upper oil return hole 31 to the lower end port of the reservoir housing 10 is 0.6L, and the axial distance h from the lower oil return hole 32 to the lower end port of the reservoir housing 10 is 0.3L.
[0042] In addition, in this embodiment, a partition 40 is provided inside the reservoir housing 10, and the partition 40 is sleeved on the outer periphery of the outlet pipe 30, and the partition 40 is located between the upper oil return hole 31 and the lower oil return hole 32. The partition 40 is an annular structure, and a through hole penetrating the upper and lower end surfaces of the partition 40 is provided on the partition 40. In addition, a filter 50 is provided inside the reservoir housing 10, and the filter 50 is located between the inlet pipe 20 and the outlet pipe 30.
[0043] Reference below Figures 1 to 6 A liquid reservoir according to a specific embodiment of the present invention is described in detail. It is worth noting that the following description is merely an exemplary description and cannot be construed as a limitation to the present invention.
[0044] The vertical liquid reservoir of this embodiment includes a liquid reservoir housing 10, an inlet pipe 20, and an outlet pipe 30; the liquid reservoir housing 10 is a hollow cavity structure, the inlet pipe 20 is arranged at the upper end of the liquid reservoir housing 10, and the inlet pipe 20 is connected to the inside of the liquid reservoir housing 10; the outlet pipe 30 is penetrated from the lower end of the liquid reservoir housing 10 into the inside of the liquid reservoir housing 10, and the portion of the outlet pipe 30 extending into the liquid reservoir housing 10 is provided with an upper oil return hole 31 and a lower oil return hole 32 at intervals along the axial direction. , the height of the upper oil return hole 31 is higher than the height of the lower oil return hole 32, and the upper oil return hole 31 can communicate with the interior of the reservoir housing 10 and the interior of the outlet pipe 30, and the lower oil return hole 32 can communicate with the interior of the reservoir housing 10 and the interior of the outlet pipe 30; wherein, the number of the upper oil return holes 31 of this embodiment is 2, the number of the lower oil return holes 32 is 2, the total opening area of the two upper oil return holes 31 is S1, the opening area of the two lower oil return holes 32 is S2, S1>S2.
[0045] Among them, the axial length L of the part of the outlet pipe 30 of this embodiment extending into the reservoir housing 10 is four-fifths of the axial length of the reservoir housing 10, the axial distance H from the upper oil return hole 31 to the lower end port of the reservoir housing 10 is 0.7L, and the axial distance h from the lower oil return hole 32 to the lower end port of the reservoir housing 10 is 0.2L.
[0046] In addition, in this embodiment, a partition 40 is provided inside the reservoir housing 10, and the partition 40 is sleeved on the outer periphery of the outlet pipe 30, and the partition 40 is located between the upper oil return hole 31 and the lower oil return hole 32. The partition 40 is an annular structure, and a through hole penetrating the upper and lower end surfaces of the partition 40 is provided on the partition 40. In addition, a filter 50 is provided inside the reservoir housing 10, and the filter 50 is located between the inlet pipe 20 and the outlet pipe 30.
[0047] Reference below Figures 1 to 6 A liquid reservoir according to a specific embodiment of the present invention is described in detail. It is worth noting that the following description is merely an exemplary description and cannot be construed as a limitation to the present invention.
[0048] The vertical liquid reservoir of this embodiment includes a liquid reservoir housing 10, an inlet pipe 20, and an outlet pipe 30; the liquid reservoir housing 10 is a hollow cavity structure, the inlet pipe 20 is arranged at the upper end of the liquid reservoir housing 10, and the inlet pipe 20 is connected to the inside of the liquid reservoir housing 10; the outlet pipe 30 is penetrated from the lower end of the liquid reservoir housing 10 into the inside of the liquid reservoir housing 10, and the portion of the outlet pipe 30 extending into the liquid reservoir housing 10 is provided with an upper oil return hole 31 and a lower oil return hole 32 at intervals along the axial direction. , the height of the upper oil return hole 31 is higher than the height of the lower oil return hole 32, and the upper oil return hole 31 can communicate with the interior of the reservoir housing 10 and the interior of the outlet pipe 30, and the lower oil return hole 32 can communicate with the interior of the reservoir housing 10 and the interior of the outlet pipe 30; wherein, the number of the upper oil return holes 31 of this embodiment is 3, the number of the lower oil return hole 32 is 1, the total opening area of the 3 upper oil return holes 31 is S1, the opening area of the 1 lower oil return hole 32 is S2, S1>S2.
[0049] Among them, the axial length L of the part of the outlet pipe 30 of this embodiment extending into the reservoir housing 10 is four-fifths of the axial length of the reservoir housing 10, the axial distance H from the upper oil return hole 31 to the lower end port of the reservoir housing 10 is 0.75L, and the axial distance h from the lower oil return hole 32 to the lower end port of the reservoir housing 10 is 0.25L.
[0050] In addition, in this embodiment, a partition 40 is provided inside the reservoir housing 10, and the partition 40 is sleeved on the outer periphery of the outlet pipe 30, and the partition 40 is located between the upper oil return hole 31 and the lower oil return hole 32. The partition 40 is an annular structure, and a through hole penetrating the upper and lower end surfaces of the partition 40 is provided on the partition 40. In addition, a filter 50 is provided inside the reservoir housing 10, and the filter 50 is located between the inlet pipe 20 and the outlet pipe 30.
[0051] The second aspect of the embodiment of the utility model provides a compressor, comprising a vertical liquid accumulator of any of the above embodiments. According to the compressor of the embodiment of the utility model, by respectively providing an upper oil return hole 31 and a lower oil return hole 32 on the outlet pipe 30 inside the liquid accumulator housing 10, the circulation volume in low-temperature heating conditions and the COP in low-temperature intermediate cooling conditions can be effectively increased.
[0052] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0053] The above embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model vertical liquid storage device and compressor. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A vertical liquid storage container, characterized in that: The invention comprises a reservoir shell, an inlet pipe and an outlet pipe; the reservoir shell is a hollow cavity structure, the inlet pipe is arranged at the upper end of the reservoir shell, and the inlet pipe is communicated with the interior of the reservoir shell; the outlet pipe is penetrated from the lower end of the reservoir shell into the interior of the reservoir shell, and the portion of the outlet pipe extending into the reservoir shell is provided with an upper oil return hole and a lower oil return hole at intervals along the axial direction, the height of the upper oil return hole is higher than the height of the lower oil return hole, and the upper oil return hole can communicate with the interior of the reservoir shell and the interior of the outlet pipe, and the lower oil return hole can communicate with the interior of the reservoir shell and the interior of the outlet pipe; the opening area of the upper oil return hole is S1, and the opening area of the lower oil return hole is S2, and S1≥S2.
2. The vertical liquid storage container according to claim 1, characterized in that: The axial length of the portion of the outlet pipe extending into the reservoir housing is L, the axial distance from the upper oil return hole to the lower end port of the reservoir housing is H, and 0.6L≤H<L.
3. The vertical liquid storage container according to claim 2, characterized in that: The axial distance from the lower oil return hole to the lower end port of the reservoir housing is h, 0<h≤0.3L.
4. The vertical liquid storage container according to claim 1, characterized in that: The number of the upper oil return holes is n, 1≤n≤3.
5. The vertical liquid storage container according to claim 4, characterized in that: The number of the lower oil return holes is 1 or 2.
6. The vertical liquid storage container according to claim 1, characterized in that: A partition is arranged inside the liquid reservoir housing, the partition is sleeved on the outer periphery of the outlet pipe, and the partition is located between the upper oil return hole and the lower oil return hole.
7. The vertical liquid storage container according to claim 6, characterized in that: The partition is an annular structure, and is provided with through holes penetrating the upper and lower end surfaces thereof.
8. The vertical liquid storage container according to claim 1, characterized in that: A filter element is disposed inside the liquid storage housing, and the filter element is located between the inlet pipe and the outlet pipe.
9. A compressor, characterized in that: Comprising the vertical liquid reservoir as claimed in any one of claims 1 to 8.