Reservoir and compressor

Abstract

The application provides a liquid accumulator and a compressor, wherein the liquid accumulator comprises a liquid accumulator shell and an air inlet pipe, the liquid accumulator shell is internally formed with a cavity for storing refrigerant; the air inlet pipe enters the cavity from the bottom of the cavity, the air inlet pipe is provided with at least one variable-diameter oil return hole, and the variable-diameter oil return hole comprises at least one elastic membrane with a variable opening and capable of adjusting the flow passage sectional area of the variable opening based on the pressure of the refrigerant. According to different liquid levels under different working conditions in the liquid accumulator, the variable-diameter oil return hole can automatically match different oil return and liquid return amounts based on the pressure of the refrigerant at different liquid levels, the system capacity can be maximally exerted, and the overall performance of the system is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment, and more specifically, to a liquid receiver and a compressor. Background Technology

[0002] A hermetic compressor includes an electric motor that generates driving force within the sealed internal space of the casing, and a compression unit connected to the motor for compressing the refrigerant. Hermetic compressors can be classified into reciprocating compressors, scroll compressors, and rotary compressors based on the different refrigerant compression mechanisms. Reciprocating compressors, scroll compressors, and rotary compressors all utilize the rotational force of an electric motor.

[0003] Currently, most household air conditioning systems have an oil return hole on the intake pipe of the compressor receiver to enable the compressor to return oil and liquid. Figure 1 This is a cross-sectional view of a compressor using existing technology. For example... Figure 1 As shown, a conventional compressor system includes a housing 5, a motor (including a stator 11, a rotor 12, and a crankshaft 13), a cylinder 3, an upper cylinder head 2, a lower cylinder head 4, and a receiver 6. The motor and cylinder 3 are housed within the housing 5. The crankshaft 13 transmits the rotational force of the motor to the piston in the cylinder 3 to compress the refrigerant. The upper cylinder head 2 and lower cylinder head 4, together with the cylinder 3, define the compression space and support the crankshaft 13. The upper cylinder head 2 is located between the motor and the cylinder 3 and has a through-hole for the crankshaft to pass through. The receiver 6 supplies refrigerant to the cylinder 3 through the intake pipe 61, and the intake pipe 61 is provided with an oil return hole 62 near the bottom of the receiver 6 to prevent the accumulation of a mixture of refrigerant and refrigeration oil (including lubricating oil, etc.) at the bottom of the receiver 6. This allows the mixture at the bottom of the receiver 6 to enter the intake pipe 61 through the oil return hole 62, and thus facilitates the return of the mixture from the intake pipe 61 to the cylinder 3 of the compressor when the receiver 6 is connected to the compressor.

[0004] Experimental research revealed that the demand for the oil return port of the receiver varies under different APF operating conditions of the air conditioning system. In other words, the current design of a single oil return port cannot meet the overall APF requirements of the air conditioning system. If the diameter of the oil return port 62 is too large, it will increase the amount of liquid carried by the compressor during suction, affecting the compressor efficiency and thus the performance of the air conditioning system. If the diameter of the oil return port 62 is too small, a large amount of liquid will accumulate in the receiver under some air conditioning conditions, limiting the refrigerant circulation and reducing the system's APF performance (Annual Performance Factor, abbreviated as APF).

[0005] Therefore, the present invention provides a liquid reservoir and a compressor. Summary of the Invention

[0006] In view of the problems in the prior art, the liquid receiver and compressor of the present invention overcome the difficulties of the prior art. They can automatically match different oil and liquid return volumes based on the pressure of different refrigerant liquid levels according to different liquid levels under different operating conditions in the liquid receiver, thereby maximizing the system capacity and improving the overall system performance.

[0007] An embodiment of the present invention provides a compressor, comprising:

[0008] A reservoir housing, wherein a cavity for storing refrigerant is formed inside the reservoir housing; and

[0009] An intake pipe enters the cavity from the bottom of the cavity. The intake pipe is provided with at least one variable diameter oil return hole. The variable diameter oil return hole includes at least one elastic membrane with a deformable opening and the flow cross-sectional area of ​​the deformable opening is adjusted based on the pressure of the refrigerant.

[0010] Preferably, as the liquid level of the refrigerant in the cavity rises, the flow cross-sectional area of ​​the variable diameter return oil hole increases;

[0011] As the liquid level of the refrigerant in the cavity decreases, the flow cross-sectional area of ​​the variable diameter return oil hole decreases.

[0012] Preferably, the intake pipe has a through hole in its wall, and the elastic membrane is provided at the through hole. The elastic membrane has at least one deformable opening that penetrates the wall of the intake pipe.

[0013] Preferably, the deformation opening is a cross-shaped opening centered on the center of the through hole, and the elastic membrane is divided into 4 flexible membrane flaps by the cross-shaped opening, with the gaps between the membrane flaps forming the cross-shaped deformation opening.

[0014] Preferably, the deformation opening is a star-shaped opening centered on the center of the through hole, and the elastic membrane is divided into 8 flexible membrane flaps by the star-shaped opening, with the gaps between the membrane flaps forming the star-shaped deformation opening.

[0015] Preferably, the intake pipe includes an intake pipe body and an extension pipe. The intake pipe body enters the cavity from the bottom of the cavity, and the extension pipe is sleeved on the intake pipe body to extend upward. The variable diameter oil return hole is disposed on the pipe wall of the extension pipe.

[0016] Preferably, the intake pipe body is provided with a return oil hole of a certain diameter.

[0017] Preferably, the intake pipe has several variable diameter oil return holes arranged along the axial direction.

[0018] Preferably, the elastic deformation of the variable diameter oil return hole closer to the top of the cavity is smaller, and the elastic deformation of the variable diameter oil return hole closer to the bottom of the cavity is larger. When the variable diameter oil return hole is submerged in refrigerant, the flow cross-sectional area of ​​the variable diameter oil return hole closer to the bottom of the cavity is larger, and the flow cross-sectional area of ​​the variable diameter oil return hole closer to the top of the cavity is smaller.

[0019] Embodiments of the present invention also provide a compressor, including: a liquid receiver as described above.

[0020] The compressor of this invention can automatically match different oil and liquid return volumes based on the pressure of different refrigerant liquid levels under different operating conditions in the liquid receiver through a variable diameter oil return hole, thereby maximizing the system capacity and improving the overall system performance. Attached Figure Description

[0021] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0022] Figure 1 This is a cross-sectional view of a compressor based on existing technology.

[0023] Figure 2 This is a cross-sectional view of the first liquid reservoir of the present invention.

[0024] Figure 3 This is a schematic diagram of the variable diameter return oil hole in the first type of liquid reservoir of the present invention in a low pressure state.

[0025] Figure 4 This is a schematic diagram of the variable diameter return oil hole in the first type of liquid reservoir of the present invention under medium pressure.

[0026] Figure 5 This is a schematic diagram of the variable diameter return oil hole in the first type of liquid reservoir of the present invention under high pressure.

[0027] Figure 6 This is a cross-sectional view of the second type of liquid reservoir of the present invention.

[0028] Figure 7 This is a cross-sectional view of the third type of liquid reservoir of the present invention.

[0029] Figure 8 This is a cross-sectional view of the compressor of the present invention.

[0030] Figure Labels

[0031] 11 Stator

[0032] 12 rotors

[0033] 13 Crankshaft

[0034] 2. Upper cylinder head

[0035] 3 cylinders

[0036] 4. Lower cylinder head

[0037] 5. Housing

[0038] 6. Liquid reservoir

[0039] 60. Liquid reservoir housing

[0040] 61 Intake pipe

[0041] 62 Oil return hole

[0042] 63. Variable diameter return oil hole

[0043] 631 flap

[0044] 632 Deformation opening

[0045] 64 Extension tube Detailed Implementation

[0046] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the content disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0047] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0048] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0049] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] For the purpose of clearly describing this application, devices that are not relevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0051] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0052] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0053] Although the terms first, second, etc., are used in some instances herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0054] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this application. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in the specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0055] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0056] Under certain operating conditions of the refrigeration system (liquid in the suction line), a mixture of refrigerant and refrigerant oil accumulates in the receiver on the compressor's suction side. An oil return hole needs to be installed on the receiver's inlet pipe to return the accumulated refrigerant and refrigerant oil mixture, ensuring compressor lubrication and maintaining the amount of refrigerant circulating in the system. Experimental research has revealed that the current design of a single oil return hole on the receiver's inlet pipe cannot meet the multi-condition requirements of the overall APF (Average Power Circulation) of the air conditioning system.

[0057] Figure 2 This is a cross-sectional view of the first liquid reservoir of the present invention. Figure 3 This is a schematic diagram of the variable diameter return oil hole in the first type of liquid reservoir of the present invention in a low pressure state. Figure 4 This is a schematic diagram of the variable diameter return oil hole in the first type of liquid reservoir of the present invention under medium pressure. Figure 5 This is a schematic diagram of the variable-diameter return oil hole in the first type of liquid reservoir of the present invention under high pressure. Figures 2 to 5As shown, the present invention provides a liquid reservoir, comprising: a liquid reservoir housing 60 and an inlet pipe 61. The liquid reservoir housing 60 forms a cavity for storing refrigerant. The inlet pipe 61 enters the cavity from the bottom and is provided with at least one variable-diameter oil return hole 63. The variable-diameter oil return hole 63 includes at least one elastic membrane with a deformable opening 632, the flow cross-sectional area of ​​which is adjusted based on the refrigerant pressure. As the refrigerant level in the cavity rises, the pressure at the liquid level where the variable-diameter oil return hole 63 is located increases. Consequently, the deformable opening 632 of the variable-diameter oil return hole 63 contracts under pressure (the elastic membrane deforms under pressure), and the flow cross-sectional area of ​​the deformable opening 632 increases. As the refrigerant level in the cavity decreases, the pressure at the liquid level where the variable-diameter oil return hole 63 is located decreases. Consequently, the deformation opening 632 of the variable-diameter oil return hole 63 expands after the pressure decreases (the elastic membrane gradually returns to its original shape after the pressure decreases), and the flow cross-sectional area of ​​the deformation opening 632 decreases. The present invention provides an adjustable oil return hole with a film-like elastic material on the inlet pipe of the liquid receiver. Depending on the different liquid levels under different operating conditions in the liquid receiver, this oil return hole controls different oil and liquid return volumes through the characteristics of the film-like elastic material. This ensures normal oil return to the compressor, guaranteeing compressor lubrication and reliability, while also improving the phenomenon of excessive liquid accumulation in the liquid receiver, ensuring sufficient refrigerant circulation in the system, maximizing system capacity, and improving the system's APF performance.

[0058] In a preferred embodiment, the wall of the intake pipe 61 is provided with a through hole, and the elastic membrane is provided at the through hole. The elastic membrane is provided with at least one deformable opening 632 that penetrates the wall of the intake pipe 61, but is not limited thereto.

[0059] In a preferred embodiment, the elastic membrane is interference-fitted into the through hole of the air inlet pipe 61, but this is not a limitation.

[0060] In a preferred embodiment, the deformation opening 632 is at least one through hole provided on the elastic membrane that can expand or shrink. The through hole can be circular, elliptical, etc., but is not limited thereto.

[0061] In a preferred embodiment, the deformable opening 632 is an array of micropores that can expand or contract on the elastic membrane, but is not limited thereto.

[0062] In a preferred embodiment, the deformation opening 632 is a cross-shaped opening disposed on the elastic membrane with the center of the through hole as the center. The elastic membrane is divided into four flexible membrane flaps 631 by the cross-shaped opening, and the gaps between the membrane flaps 631 together form the cross-shaped deformation opening 632.

[0063] See Figure 3When the variable-diameter return oil hole in the first type of reservoir of the present invention is in a low-pressure state, the pressure on the diaphragm flap 631 is minimal. Therefore, the diaphragm flap 631 can return to a near-planar state, minimizing the flow cross-sectional area S1 of the cross-shaped deformation opening 632 formed by the gaps between the diaphragm flaps 631. See also... Figure 4 When the variable-diameter return oil hole in the first type of reservoir of the present invention is in a medium-pressure state, the pressure on the diaphragm flap 631 increases, and the diaphragm flap 631 is subjected to pressure and curled up (with...). Figure 3 Compared to the previous state, this increases the flow cross-sectional area S2 of the cross-shaped deformation opening 632 formed by the enlarged gap between the membrane flaps 631. See also Figure 5 When the variable-diameter return oil hole in the first type of reservoir of the present invention is under high pressure, the pressure on the diaphragm flap 631 is the greatest, and the diaphragm flap 631 curls more significantly under the high pressure. Figure 4 Compared to the previous state, the gap between the membrane flaps 631 is further expanded, and the cross-sectional area S3 of the cross-shaped deformation opening 632 is maximized.

[0064] In a preferred embodiment, the deformation opening 632 is a star-shaped opening disposed on the elastic membrane with the center of the through hole as the center. The elastic membrane is divided into 8 flexible membrane flaps 631 by the star-shaped opening. The gaps between the membrane flaps 631 together form the star-shaped deformation opening 632, but it is not limited thereto.

[0065] This invention proposes a scheme for setting an adjustable oil return hole with a film-like elastic material on the inlet pipe of a liquid receiver. Under different APF operating conditions, the oil return hole controls the different oil and liquid return volumes based on the different liquid levels in the liquid receiver under different conditions. This ensures normal oil return from the compressor, improves the phenomenon of excessive liquid accumulation in the liquid receiver, guarantees sufficient refrigerant circulation in the system, maximizes system capacity, and improves the system's APF performance. The oil return hole with a film-like elastic material is set on the inlet pipe of the liquid receiver in this invention. At the center of the oil return hole, a cross-shaped hole is formed in the film-like elastic material. Figure 3 , 4 As shown in the schematic diagram, the opening size of the cross hole is flexibly adjusted according to the pressure difference caused by the different liquid level differences in the reservoir under different working conditions, so as to control the different oil return and liquid return volumes of the return oil hole.

[0066] Figure 6 This is a cross-sectional view of the second type of liquid reservoir of the present invention. (See diagram below.) Figure 6As shown, the present invention provides a second type of reservoir, comprising: a reservoir housing 60 and an inlet pipe 61. The reservoir housing 60 forms a cavity for storing refrigerant. The inlet pipe 61 enters the cavity from the bottom and is provided with at least one variable-diameter oil return hole 63. The variable-diameter oil return hole 63 includes at least one elastic membrane with a deformation opening 632, the flow cross-sectional area of ​​which is adjusted based on the refrigerant pressure. The inlet pipe 61 includes an inlet pipe 61 body and an extension pipe 64. The inlet pipe 61 body enters the cavity from the bottom. The extension pipe 64 is generally made of iron, and the inlet pipe 61 is made of copper. The two are generally connected by brazing. The extension pipe 64 is sleeved on the inlet pipe 61 body to extend upwards. The variable-diameter oil return hole 63 is provided on the wall of the extension pipe 64. The inlet pipe 61 body is provided with a fixed-diameter oil return hole 62, but is not limited thereto. In this invention, a return oil hole with a film-like elastic material can be provided on the air inlet pipe of the liquid reservoir, or a return oil hole with a film-like elastic material can be provided on top of a basic return oil hole on the air inlet pipe of the liquid reservoir. The type of film-like elastic material is selected according to the pressure difference range caused by the liquid level height in the liquid reservoir.

[0067] Figure 7 This is a cross-sectional view of the third type of liquid reservoir of the present invention. (See diagram below.) Figure 7 As shown, the present invention provides a third type of refrigerant reservoir, comprising: a reservoir housing 60 and an inlet pipe 61. The reservoir housing 60 forms a cavity for storing refrigerant. The inlet pipe 61 enters the cavity from the bottom, and each of the two different heights of the inlet pipe 61 is provided with a variable-diameter oil return hole 63. The variable-diameter oil return hole 63 includes at least an elastic membrane with a deformable opening 632, the flow cross-sectional area of ​​which is adjusted based on the pressure of the refrigerant. The intake pipe 61 has several variable diameter oil return holes 63 arranged axially. The elastic deformation of the variable diameter oil return holes 63 closer to the top of the cavity is smaller, and the elastic deformation of the variable diameter oil return holes 63 closer to the bottom of the cavity is larger. When the variable diameter oil return holes 63 are immersed in refrigerant, the flow cross-sectional area of ​​the variable diameter oil return holes 63 closer to the bottom of the cavity is larger, and the flow cross-sectional area of ​​the variable diameter oil return holes 63 closer to the top of the cavity is smaller, thereby enhancing the backflow compensation effect of the variable diameter oil return holes 63, but not limited to this.

[0068] This invention features an adjustable oil return orifice with a film-like elastic material on the inlet pipe of the receiver. Under different APF (Air Pressure Response) conditions, the oil return orifice controls the amount of oil and liquid returned based on the varying liquid levels within the receiver. This ensures normal oil return to the compressor, maintains pump lubrication, and improves compressor reliability. The liquid return also mitigates excessive liquid accumulation in the receiver, ensuring sufficient refrigerant circulation, maximizing system capacity, and improving APF performance. Due to the plasticity of the film-like material, this adjustable oil return orifice has a wide range of applications, suitable for adjusting the oil and liquid return amounts in air conditioning systems of different energy efficiency levels under various operating conditions. The oil return orifice, with a cross-shaped opening at its center, is located on the inlet pipe of the receiver. The opening size of the cross-shaped opening is elastically adjusted based on the pressure difference caused by varying liquid levels in the receiver under different operating conditions, thus controlling the amount of oil and liquid returned. To maximize system capacity and improve system APF performance. Due to the plasticity of the film material, this adjustable oil return orifice has a wide range of applications, used in air conditioning systems of different energy efficiency levels to adjust the oil and liquid return rates under different operating conditions.

[0069] Figure 8 This is a cross-sectional view of the compressor of the present invention. (As shown) Figure 8 As shown, the present invention provides a compressor, including: a housing 5, a motor (including a stator 11, a rotor 12, and a crankshaft 13), a cylinder 3, an upper cylinder head 2, a lower cylinder head 4, and the aforementioned liquid receiver 6. The motor and cylinder 3 are housed within the housing 5. The crankshaft 13 transmits the rotational force of the motor to the piston in the cylinder 3 to compress the refrigerant. The upper cylinder head 2 and lower cylinder head 4, together with the cylinder 3, define a compression space and support the crankshaft 13. The upper cylinder head 2 is located between the motor and the cylinder 3, and has a through hole for the crankshaft to pass through. A liquid receiver housing 60 and an intake pipe 61 are also included. The liquid receiver housing 60 forms a cavity for storing refrigerant. The intake pipe 61 enters the cavity from the bottom of the cavity and has at least one variable-diameter oil return hole 63. The variable-diameter oil return hole 63 includes at least one elastic membrane with a deformable opening 632, the flow cross-sectional area of ​​which is adjusted based on the refrigerant pressure. The intake pipe 61 includes an intake pipe body and an extension pipe 64. The intake pipe body enters the cavity from the bottom. The extension pipe 64 is generally made of iron, while the intake pipe 61 is made of copper. The two are generally connected by brazing. The extension pipe 64 is sleeved on the intake pipe body to extend upwards. A variable diameter oil return hole 63 is provided on the wall of the extension pipe 64. The intake pipe body is provided with a fixed diameter oil return hole 62. The relevant technical features are as described above and will not be repeated here.

[0070] In summary, the liquid receiver and compressor of the present invention can automatically match different oil and liquid return volumes based on the pressure of different refrigerant liquid levels under different operating conditions in the liquid receiver through the variable diameter oil return hole, thereby maximizing the system capacity and improving the overall system performance.

[0071] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A liquid reservoir, characterized in that, include: A reservoir housing (60) has a cavity for storing refrigerant inside. as well as An intake pipe (61) enters the cavity from the bottom of the cavity. The intake pipe (61) is provided with at least one variable diameter oil return hole (63). The variable diameter oil return hole (63) includes at least one elastic membrane with a deformable opening (632) and the flow cross-sectional area of ​​the deformable opening (632) is adjusted based on the pressure of the refrigerant.

2. The reservoir as claimed in claim 1, characterized in that, As the liquid level of the refrigerant in the cavity rises, the flow cross-sectional area of ​​the variable diameter return oil hole (63) increases; As the liquid level of the refrigerant in the cavity decreases, the flow cross-sectional area of ​​the variable diameter return oil hole (63) becomes smaller.

3. The reservoir as described in claim 1, characterized in that, The intake pipe (61) has a through hole in its wall, and the elastic membrane is provided at the through hole. The elastic membrane has at least one deformable opening (632) that penetrates the wall of the intake pipe (61).

4. The reservoir as described in claim 3, characterized in that, The deformation opening (632) is a cross-shaped opening centered on the center of the through hole. The elastic membrane is divided into four flexible membrane flaps (631) by the cross-shaped opening. The gaps between the membrane flaps (631) together form the cross-shaped deformation opening (632).

5. The reservoir as described in claim 3, characterized in that, The deformation opening (632) is a star-shaped opening centered on the center of the through hole. The elastic membrane is divided into 8 flexible membrane flaps (631) by the star-shaped opening. The gaps between the membrane flaps (631) together form the star-shaped deformation opening (632).

6. The reservoir as claimed in claim 1, characterized in that, The intake pipe (61) includes an intake pipe (61) body and an extension pipe (64). The intake pipe (61) body enters the cavity from the bottom of the cavity. The extension pipe (64) is sleeved on the intake pipe (61) body to extend upward. The variable diameter oil return hole (63) is provided on the pipe wall of the extension pipe (64).

7. The reservoir as claimed in claim 6, characterized in that, The intake pipe (61) body is provided with a certain diameter oil return hole (62).

8. The reservoir as claimed in claim 1, characterized in that, The intake pipe (61) has several variable diameter oil return holes (63) arranged along the axial direction.

9. The reservoir as claimed in claim 8, characterized in that, The elastic deformation of the variable diameter return oil hole (63) closer to the top of the cavity is smaller, and the elastic deformation of the variable diameter return oil hole (63) closer to the bottom of the cavity is larger. When the variable diameter return oil hole (63) is immersed in the refrigerant, the flow cross-sectional area of ​​the variable diameter return oil hole (63) closer to the bottom of the cavity is larger, and the flow cross-sectional area of ​​the variable diameter return oil hole (63) closer to the top of the cavity is smaller.

10. A compressor, characterized in that, include: The reservoir as described in any one of claims 1 to 9.

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