Flow control device and refrigeration device

Abstract

The utility model provides a flow control device and a refrigeration device. The flow control device includes a housing, a flexible membrane, and a storage device. A space is defined by the shell and comprises a first cavity and a second cavity, and the first cavity is used for allowing a first medium to flow through; the flexible film is located in the space and separates the first cavity from the second cavity; a third cavity is defined by the storage device, the third cavity is used for storing a second medium, and when the temperature of the first medium is larger than a threshold value, the second medium flows into the second cavity to extrude the flexible film towards the interior of the first cavity. The flow control device can control the second medium to circulate between the second cavity and the third cavity according to the temperature change of the first medium, so that the flexible film deforms to change the volume of the first cavity, and the flow adjustment of the first medium is realized.

Description

Technical Field

[0001] The present application relates to the technical field of flow control, and in particular to a flow control device and a refrigeration device. Background Art

[0002] With the development of refrigeration technology, many different types of oil separators and refrigeration devices have appeared on the market. At present, oil separators are used in refrigeration devices to separate oil droplets from refrigerants. Common oil separators include gravity oil separators, electrode oil separators, membrane oil separators, centrifugal oil separators and chemical oil separators. The performance of oil separators decreases under full load conditions. For example, as the inlet water temperature of the condenser increases, the refrigerant flow rate decreases, and the refrigerant flow rate entering the oil separator becomes smaller, resulting in reduced oil separation efficiency. Utility Model Content

[0003] The present application provides a flow control device and a refrigeration device, which improve the oil separation efficiency by controlling the flow rate through the flow control device.

[0004] An embodiment of the present application provides a flow control device, comprising: a shell, a flexible membrane and a storage device, wherein the shell encloses a space, the space comprises a first cavity and a second cavity, the first cavity is used for a first medium to flow through; the flexible membrane is located in the space and separates the first cavity from the second cavity; the storage device encloses a third cavity, the third cavity is used to store a second medium, and when the temperature of the first medium is greater than a threshold value, the second medium flows into the second cavity to squeeze the flexible membrane toward the inside of the first cavity.

[0005] Furthermore, when the temperature of the first medium is greater than a threshold value, the temperature of the first medium heats the second medium so that the second medium vaporizes and enters the second cavity.

[0006] Furthermore, the flow control device includes a first connecting pipe fixed to the housing, the first connecting pipe is connected to the first cavity so that the first medium flows through and into the first cavity, the storage device is fixed to the first connecting pipe, and the temperature of the first medium flowing through the first connecting pipe is transferred to the storage device via the first connecting pipe to heat the second medium.

[0007] Furthermore, the flow control device also includes a heat preservation device, and the heat preservation device is coated on the outside of the storage device and the first connecting pipe.

[0008] Furthermore, the flexible film encloses the first cavity, and the second cavity is located between the flexible film and the housing.

[0009] Furthermore, the second cavity is arranged around the first cavity.

[0010] Further, the shell includes an annular first main body portion and a first fixing portion and a second fixing portion respectively extending from opposite ends of the first main body portion, the flexible membrane includes an annular second main body portion and a third fixing portion and a fourth fixing portion respectively extending from opposite ends of the second main body portion, the first main body portion and the second main body portion enclose the second cavity, the first fixing portion is fixed to the third fixing portion, and the second fixing portion is fixed to the fourth fixing portion.

[0011] Further, the first fixing portion is fixed to the third fixing portion by vulcanization bonding; and / or the second fixing portion is fixed to the fourth fixing portion by vulcanization bonding.

[0012] Furthermore, it also includes a first connecting tube and a second connecting tube, the first connecting tube includes a first tubular portion and a first mounting portion extending from the first tubular portion, the second connecting tube includes a second tubular portion and a second mounting portion extending from the second tubular portion, the first tubular portion, the first cavity and the second tubular portion are connected in sequence, the first mounting portion is fixed to the first fixing portion, at least part of the third fixing portion is located between the first tubular portion and the first fixing portion, the second mounting portion is fixed to the second fixing portion, and at least part of the fourth fixing portion is located between the second tubular portion and the second fixing portion.

[0013] Furthermore, it also includes a first seal and a second seal, the first seal is located between the first fixing part and the first mounting part to fit and seal with the first fixing part and the first mounting part, and the second seal is located between the second fixing part and the second mounting part to fit and seal with the second fixing part and the second mounting part.

[0014] Furthermore, the first mounting portion is annular and is arranged around the periphery of the first tubular portion, the second mounting portion is annular and is arranged around the periphery of the second tubular portion, the first fixing portion and the second fixing portion are annular and are arranged around the periphery of the first main body portion, the first mounting portion and the first fixing portion are fixed by a first bolt, and the second mounting portion and the second fixing portion are fixed by a second bolt.

[0015] The embodiment of the present application also provides a refrigeration device, including a compressor, an oil separator and the above-mentioned flow control device, wherein the first cavity connects the compressor and the oil separator, and the first medium flowing out of the compressor flows into the oil separator through the first cavity.

[0016] In some embodiments, the above technical solution controls the second medium to flow between the second cavity and the third cavity according to the temperature change of the first medium, thereby causing the flexible membrane to deform to change the volume of the first cavity, thereby realizing flow regulation of the first medium. When the flow control device is connected to the oil separator, the speed of the airflow entering the oil separator can be controlled to improve the oil separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a flow control device according to an exemplary embodiment of the present application.

[0018] Figure 2 yes Figure 1 Exploded view of the flow control device shown.

[0019] Figure 3 yes Figure 2 The flow control device shown is a schematic cross-sectional view along line AA.

[0020] Figure 4 yes Figure 1 A cross-sectional schematic diagram of the flow control device shown in FIG. 1 , wherein the flexible membrane is in an undeformed state.

[0021] Figure 5 yes Figure 1 A cross-sectional schematic diagram of the flow control device shown, wherein the flexible membrane is in a deformed state.

[0022] Figure 6 yes Figure 1 Schematic diagram of the flow control device and the oil separator after being fixed.

[0023] Explanation of the accompanying drawings: 100, flow control device; 1, flexible membrane; 11, first cavity; 12, second main body; 13, third fixing part; 14, fourth fixing part; 2, shell; 20, space; 21, second cavity; 22, first main body; 23, first fixing part; 24, second fixing part; 3, storage device; 31, third cavity; 4, connecting pipe; 41, connecting port; 5, first connecting pipe; 50, first pipeline; 501, fourth cavity; 51, first tubular part; 52, first mounting part; 6, second connecting pipe; 60, second pipeline; 601, fifth cavity; 61, second tubular part; 62, second mounting part; 7, first sealing member; 71, first bolt; 8, second sealing member; 81, second bolt; 9, insulation device; 10, oil separator; 101, inlet pipeline. DETAILED DESCRIPTION

[0024] The embodiments of the present application provide a flow control device for use in industrial manufacturing, building systems, medical care, environmental protection and other fields to control and regulate the flow of various fluids (such as gases and liquids) to ensure the stability and efficiency of the production process.

[0025] See also Figures 1 to 3 As shown, the flow control device 100 comprises: a housing 2 , a flexible membrane 1 and a storage device 3 . The housing 2 is arranged outside the flexible membrane 1 , and the storage device 3 is fixed to the housing 2 .

[0026] See also Figure 4 and Figure 5 As shown, the housing 2 encloses a space 20, which includes a first cavity 11 and a second cavity 21. The first cavity 11 is used for the first medium to flow through; the flexible membrane 1 is located in the space 20 and separates the first cavity 11 and the second cavity 21; the storage device 3 encloses a third cavity 31, which is used to store the second medium. When the temperature of the first medium is greater than a threshold value, the second medium flows into the second cavity 21 to squeeze the flexible membrane 1 toward the inside of the first cavity 11.

[0027] In an embodiment of the present application, the temperature of the first medium can be detected by a detection device, and the control device controls the flow of the second medium according to the detection result of the monitoring device; when the temperature of the first medium is greater than a threshold value, the control device controls the second medium to enter the second cavity 21 to squeeze the flexible membrane 1 toward the inside of the first cavity 11.

[0028] In the embodiment of the present application, the flexible membrane 1 separates the first cavity 11 and the second cavity 21. When the temperature of the first medium exceeds a threshold value, the second medium will vaporize and then flow into the second cavity 21, thereby pushing the flexible membrane 1 to squeeze into the first cavity 11, reducing the volume of the first cavity 11. When the flow rate of the first medium is fixed, when the volume of the first cavity 11 decreases, the flow rate of the first medium increases accordingly. The device has a simple structure, does not require a complex electronic control system, has a compact structure, and has low cost.

[0029] In some embodiments, other types of variable cross-sectional structures are used to replace the flexible membrane 1, such as a retractable piston or a valve with adjustable aperture, etc., and temperature changes are used to make these structures change the cross-sectional area of ​​the first cavity 11 to adjust the flow rate and flow velocity.

[0030] In some embodiments, the second medium may use a refrigerant such as R22 (hydrochlorofluorocarbon) or R410A (hydrofluorocarbon) to improve the induction and vaporization or liquefaction efficiency of the second medium.

[0031] Optionally, the second medium may also be an organic phase change material with a moderate melting point, such as paraffin, fatty acid, etc. These materials will undergo significant volume changes near the phase change temperature and can be used to drive the cross-sectional area of ​​the first cavity 11 to change.

[0032] Optionally, the second medium may also be some low-boiling point liquid with a moderate boiling point. When the temperature rises, the volume of the liquid will expand significantly, and can be used to push the flexible membrane 1 to deform, thereby changing the cross-sectional area of ​​the first cavity 11.

[0033] In some embodiments, the storage device 3 may be replaced with a temperature sensor, and the flexible membrane 1 may be converted into an electric valve, so that the flow control device 100 can actively adjust the flow rate through electronic control.

[0034] In some embodiments, a temperature-sensitive spring is used to replace the second medium. One end of the temperature-sensitive spring is fixed to the housing 2 , and the other end of the temperature-sensitive spring abuts against the outer wall of the flexible membrane 1 to change the volume of the first cavity 11 .

[0035] like Figure 3 As shown, the flexible membrane 1 includes an annular second main body portion 12 and a third fixing portion 13 and a fourth fixing portion 14 respectively extending from opposite ends of the second main body portion 12; the outer shell 2 includes an annular first main body portion 22 and a first fixing portion 23 and a second fixing portion 24 respectively extending from opposite ends of the first main body portion 22; the first main body portion 22 and the second main body portion 12 enclose a second cavity 21, the first fixing portion 23 is fixed to the third fixing portion 13, and the second fixing portion 24 is fixed to the fourth fixing portion 14.

[0036] In some embodiments, the first fixing portion 23 and the third fixing portion 13 are fixed by vulcanization bonding.

[0037] In some embodiments, the second fixing portion 24 is fixed to the fourth fixing portion 14 by vulcanization bonding.

[0038] In some embodiments, the first fixing portion 23 and the third fixing portion 13 are fixed by vulcanization bonding, and the second fixing portion 24 and the fourth fixing portion 14 are also fixed by vulcanization bonding.

[0039] Optionally, the first fixing portion 23 and the third fixing portion 13 , and the second fixing portion 24 and the fourth fixing portion 14 may also be fixed by laser welding or electron beam welding.

[0040] In some embodiments, the flexible membrane 1 and the housing 2 may be integrally formed.

[0041] In some embodiments, the first fixing portion 23 and the third fixing portion 13 as well as the second fixing portion 24 and the fourth fixing portion 14 are connected by detachable threaded connections, so as to facilitate future maintenance and replacement.

[0042] In some embodiments, a snap-on connection structure may be used instead of vulcanization bonding to achieve quick installation and removal between the flexible membrane 1 and the housing 2 through the engagement of the snap-on connection.

[0043] In some embodiments, viscous glue may be used instead of vulcanization bonding to fix the housing 2 and the flexible membrane 1 .

[0044] The flexible membrane 1 is annular and encloses a first cavity 11, and the second cavity 21 is located between the flexible membrane 1 and the housing 2. The second cavity 21 is arranged around the first cavity 11. Since the volume of the space 20 enclosed by the housing 2 is fixed, when the second medium in the storage device 3 senses a temperature change, the second medium state is converted to change the volume of the second cavity 21, and the volume of the first cavity 11 also changes accordingly, and the flow of the first medium passing through the first cavity 11 is adjusted.

[0045] In some embodiments, the flexible membrane 1 is in sheet form and fixed to the housing 2. One or more flexible membranes 1 may be provided. The flexible membrane 1 and part of the housing 2 form a first cavity 11, and the flexible membrane 1 and another part of the housing 2 form a second cavity 21. The second cavity 21 is located outside the first cavity 11.

[0046] In some embodiments, the second cavity 21 may also be disposed in the first cavity 11 , and the cross-sectional area of ​​the first cavity 11 may also be changed by changing the volume of the second cavity 21 .

[0047] like Figure 5 As shown, when the storage device 3 is heated, the second medium in the storage device 3 vaporizes, the volume of the second medium increases and flows into the second cavity 21, and the flexible membrane 1 expands inward. At this time, the second main body 12 of the flexible membrane 1 is a smooth arc. Compared with the conventional conical flow port, the smooth arc-shaped second main body 12 can increase the flow rate of the first medium while reducing the pressure on the second main body 12, thereby improving the durability of the flexible membrane 1.

[0048] In some embodiments, the flexible membrane 1 is made of a flexible material, such as EPDM rubber, which can withstand high temperatures for a long time, thereby improving the durability of the flexible membrane 1 .

[0049] In some embodiments, the flexible membrane 1 may also be made of materials such as fluororubber, silicone rubber, polytetrafluoroethylene, or thermoplastic polyurethane.

[0050] See also Figure 2 and Figure 3As shown, the flow control device 100 includes a first connecting pipe 5 fixed to the housing 2, the first connecting pipe 5 is connected to the first cavity 11, so that the first medium flows through and flows into the first cavity 11, and the storage device 3 is fixed to the first connecting pipe 5. The temperature of the first medium flowing through the first connecting pipe 5 is transferred to the storage device 3 via the first connecting pipe 5 to heat the second medium. The storage device 3 is fixed to the first connecting pipe 5, so that the heat of the first medium can be effectively transferred to the second medium in the storage device 3, avoiding heat loss in the intermediate link, improving the overall heat transfer efficiency, and when the temperature of the first medium changes, the second medium is heated or cooled by heat transfer, which is conducive to achieving accurate flow control.

[0051] See also Figure 1 As shown, the flow control device 100 further includes a heat preservation device 9, which is coated on the outside of the storage device 3 and the first connecting pipe 5. The heat preservation device 9 can effectively reduce the heat loss on the surface of the storage device 3 and the first connecting pipe 5, maintain the heat transfer efficiency, and improve the heat utilization efficiency of the entire system.

[0052] In some embodiments, the heat preservation device 9 may be made of heat preservation and heat insulating materials such as foamed polyethylene and foamed polyurethane, or inorganic heat insulating materials such as mineral fiber wool and ceramic fiber.

[0053] In some embodiments, the heat preservation device 9 may be a vacuum insulation tank or a vacuum insulation panel, which can effectively block heat transfer.

[0054] In some embodiments, an electric heating device or electric heating pipe is integrated inside the heat preservation device 9 to actively provide heating for the storage device 3 and the first connecting pipe 5 to compensate for heat loss.

[0055] In some embodiments, the storage device 3 may be directly disposed in the first connecting pipe 5 so that the storage device 3 directly absorbs heat from the first medium, thereby utilizing the heat more efficiently.

[0056] In some embodiments, heat transfer devices such as heat pipes or heat pumps may be used to more efficiently transfer the heat of the first medium to the storage device 3 to improve overall system performance.

[0057] See also Figure 4 and Figure 5 The flow control device 100 further includes a connecting pipe 4, which connects the third cavity 31 and the second cavity 21, and the second medium can flow in the second cavity 21, the third cavity 31 and the connecting pipe 4. A connecting port 41 is provided on the first main body 22 for one end of the connecting pipe 4 to extend into the second cavity 21, and the other end of the connecting pipe 4 is connected to the storage device 3.

[0058] In some embodiments, the connecting pipe 4 is disposed in the connecting port 41 , and the connecting pipe 4 is fixed to the first main body 22 by welding.

[0059] Optionally, the connecting pipe 4 is disposed in the connecting port 41 , and the connecting pipe 4 and the first main body 22 are fixed by means of adhesive glue, bolts or rivets.

[0060] In some embodiments, the connecting pipe 4 may not be provided, and one end of the storage device 3 may be directly fixed to the housing 2 so that the second cavity 21 and the third cavity 31 are connected.

[0061] In some embodiments, the storage device 3 and the first connecting pipe 5 are integrally formed, and the current connecting pipe 4 can be omitted.

[0062] Optionally, the storage device 3 and the first connecting pipe 5 are made of copper. Copper has a high thermal conductivity and can quickly transfer the heat of the first medium to the second medium, which helps to improve the heat transfer efficiency and response speed of the entire system.

[0063] The first connecting pipe 5 includes a first tubular portion 51 and a first mounting portion 52 extending from the first tubular portion 51. The second connecting pipe 6 is also fixed to the housing 2. The second connecting pipe 6 includes a second tubular portion 61 and a second mounting portion 62 extending from the second tubular portion 61. The first tubular portion 51, the first cavity 11 and the second tubular portion 61 are connected in sequence. The first mounting portion 52 is fixed to the first fixing portion 23. At least part of the third fixing portion 13 is located between the first tubular portion 51 and the first fixing portion 23. The second mounting portion 62 is fixed to the second fixing portion 24. At least part of the fourth fixing portion 14 is located between the second tubular portion 61 and the second fixing portion 24. Extending part of the third fixing portion 13 between the first tubular portion 51 and the first fixing portion 23 and extending part of the fourth fixing portion 14 between the second tubular portion 61 and the second fixing portion 24 improves the airtightness of the second cavity 21 and prevents leakage of the second medium in the second cavity 21.

[0064] In some embodiments, the first tubular portion 51 and the first mounting portion 52 are designed to be separate and are fixed to the first fixing portion 23 .

[0065] In some embodiments, the second tubular portion 61 and the second mounting portion 62 are designed to be separate, and the second mounting portion 62 is fixed to the second fixing portion 24 .

[0066] In some embodiments, the first tubular portion 51 and the first mounting portion 52 are designed to be separate, and the first mounting portion 52 is fixed to the first fixing portion 23 .

[0067] In some embodiments, the first tubular portion 51 and the second tubular portion 61 are made of copper to improve heat transfer efficiency.

[0068] In some embodiments, the first tubular portion 51 and the second tubular portion 61 may also be made of aluminum alloy, stainless steel, copper-nickel alloy, carbon fiber, composite material, ceramic material, and the like.

[0069] In some embodiments, a flexible pipe such as a metal hose or a corrugated tube is used to replace the first tubular portion 51 and the second tubular portion 61 to increase the flexibility of the layout.

[0070] See also Figure 4 The flow control device 100 also includes a first pipe 50 and a second pipe 60. Part of the first pipe 50 extends into the first tubular portion 51 and is fixed to the first tubular portion 51. The first pipe 50 surrounds a fourth cavity 501. The first connecting pipe 5 is connected to the fourth cavity 501. Part of the second pipe 60 extends into the second tubular portion 61 and is fixed to the second tubular portion 61. The second pipe 60 surrounds a fifth cavity 601. The second connecting pipe 6 is connected to the fifth cavity 601. The first medium flows into the fourth cavity 501, first passes through the first connecting pipe 5 and then flows into the first cavity 11, and then passes through the second connecting pipe 6 and flows into the fifth cavity 601.

[0071] Optionally, the storage device 3 may not be fixed to the first connecting pipe 5, but the storage device 3 may be fixed to the first pipe 50. The heat of the first medium flowing in the fourth cavity 501 may also be transferred to the storage device 3 through the first pipe 50, thereby transferring heat to heat or cool the second medium, thereby realizing the control of the flow rate of the first medium when passing through the first cavity 11.

[0072] In some embodiments, the storage device 3 and the first pipe 50 are fixed, and the heat preservation device 9 is wrapped around the storage device 3 and the first pipe 50 .

[0073] In some embodiments, the first pipe 50 and the first connecting pipe 5 are integrally formed, and the first tubular portion 51 extends the first pipe 50 outward from the first cavity 11 .

[0074] In some embodiments, the second pipe 60 and the second connecting pipe 6 are integrally formed, and the second tubular portion 61 extends the second pipe 60 outward from the first cavity 11 .

[0075] See also Figure 4 and Figure 5 As shown, the flow control device 100 further includes a first sealing member 7 and a second sealing member 8, wherein the first sealing member 7 is located between the first fixing portion 23 and the first mounting portion 52 to be sealed against the first fixing portion 23 and the first mounting portion 52, and the second sealing member 8 is located between the second fixing portion 24 and the second mounting portion 62 to be sealed against the second fixing portion 24 and the second mounting portion 62. The provision of the first sealing member 7 and the second sealing member 8 further improves the airtightness of the second cavity 21.

[0076] In the embodiment of the present application, the first sealing member 7 and the second sealing member 8 are sealed by O-rings.

[0077] In some embodiments, other types of sealing members such as gaskets, sealants, etc. may be used.

[0078] In some embodiments, the first sealing member 7 may be installed in a groove of the first fixing portion 23 or the first installation portion 52 .

[0079] In some embodiments, the second sealing member 8 may be installed in a groove of the second fixing portion 24 or the second installation portion 62 .

[0080] In some embodiments, a plurality of seals may be provided between the first fixing portion 23 and the first mounting portion 52 and between the second fixing portion 24 and the second mounting portion 62 to form a multiple sealing structure to further improve the overall sealing reliability.

[0081] See also Figure 3 and Figure 4 The first mounting portion 52 is annular and is arranged around the periphery of the first tubular portion 51, the second mounting portion 62 is annular and is arranged around the periphery of the second tubular portion 61, the first fixing portion 23 and the second fixing portion 24 are annular and are arranged around the periphery of the first main body portion 22, the first mounting portion 52 and the first fixing portion 23 are fixed by a first bolt 71, and the second mounting portion 62 and the second fixing portion 24 are fixed by a second bolt 81. The installation is convenient and quick, and the bolt tightening can ensure a firm and reliable connection.

[0082] In some embodiments, the first mounting portion 52 and the first fixing portion 23 as well as the second mounting portion 62 and the second fixing portion 24 may also be fixed by other connection methods, such as welding, riveting, etc.

[0083] In some embodiments, the shapes of the first mounting portion 52 and the second mounting portion 62 may also be other shapes, such as a straight line, a square, a cone, or other geometric shapes, to match the first fixing portion 23 and the second fixing portion 24 .

[0084] In some embodiments, the first sealing member 7 and the second sealing member 8 may be made of silicone rubber, polyurethane, or polytetrafluoroethylene.

[0085] In some embodiments, the first fixing portion 23 and the second fixing portion 24 may also be in other shapes, such as a straight line, a square, a cone, or other geometric shapes, and are fixed on the first main body portion 22 .

[0086] See also Figure 6As shown, the embodiment of the present application further provides a refrigeration device, including a compressor, an oil separator 10 and the above-mentioned flow control device 100, the first cavity 11 connects the compressor and the oil separator 10, and the first medium flowing out of the compressor flows into the oil separator 10 through the first cavity 11. The flow control device 100 is installed between the compressor outlet and the oil separator 10 inlet.

[0087] The oil separator 10 is provided with an inlet pipe 101 , and the second connecting pipe 6 of the flow control device 100 is connected with the inlet pipe 101 . The first medium passes through the first cavity 11 and then enters the oil separator 10 through the inlet pipe 101 to work.

[0088] In some embodiments, the flow control device 100 may also be installed on the pipeline before the first medium enters the compressor to adjust the flow of the first medium before the compressor and adjust the flow of the entire refrigeration device.

[0089] The specific working steps of the refrigeration device are as follows: the first medium discharged from the compressor flows into the oil separator 10 through the first cavity 11; the function of the oil separator 10 is to separate the lubricating oil from the first medium discharged from the compressor. The storage device 3 is arranged on the first connecting pipe 5. When the temperature of the first medium is higher than the set threshold, the first medium heats the first connecting pipe 5 and then the heat is transferred to the storage device 3, so that the second medium stored in the third cavity 31 is heated and vaporized and flows into the second cavity 21; when the second medium enters the second cavity 21, it will push the flexible membrane 1 into the first cavity 11, thereby reducing the flow cross-sectional area of ​​the first cavity 11. Because the total flow volume of the first medium entering the flow control device 100 remains unchanged, when the flow cross-sectional area of ​​the first cavity 11 becomes smaller, the flow rate of the first medium entering the oil separator 10 will increase. When the flow rate of the first medium increases, the separation efficiency of the oil separator 10 will increase accordingly.

Claims

1. A flow control device, characterized in that: include: The housing encloses a space, wherein the space includes a first cavity and a second cavity, wherein the first cavity is used for a first medium to flow through; a flexible membrane, located in the space and separating the first cavity from the second cavity; The storage device forms a third cavity, and the third cavity is used to store a second medium. When the temperature of the first medium is greater than a threshold, the second medium flows into the second cavity to press the flexible film toward the inside of the first cavity.

2. The flow control device according to claim 1, characterized in that: When the temperature of the first medium is greater than a threshold, the temperature of the first medium heats the second medium so that the second medium vaporizes and enters the second cavity.

3. The flow control device according to claim 2, characterized in that: The storage device includes a first connecting pipe fixed to the shell, the first connecting pipe is connected to the first cavity so that the first medium flows through and into the first cavity, the storage device is fixed to the first connecting pipe, and the temperature of the first medium flowing through the first connecting pipe is transferred to the storage device via the first connecting pipe to heat the second medium.

4. The flow control device according to claim 3, characterized in that: It also includes a heat preservation device, which covers the outer sides of the storage device and the first connecting pipe.

5. The flow control device according to claim 1, characterized in that: The flexible film encloses the first cavity, and the second cavity is located between the flexible film and the housing.

6. The flow control device according to claim 5, characterized in that: The second cavity is arranged around the first cavity.

7. The flow control device according to claim 6, characterized in that: The shell includes an annular first main body portion and a first fixing portion and a second fixing portion respectively extending from opposite ends of the first main body portion, the flexible membrane includes an annular second main body portion and a third fixing portion and a fourth fixing portion respectively extending from opposite ends of the second main body portion, the first main body portion and the second main body portion enclose the second cavity, the first fixing portion is fixed to the third fixing portion, and the second fixing portion is fixed to the fourth fixing portion.

8. The flow control device according to claim 7, characterized in that: The first fixing portion is fixed to the third fixing portion by vulcanization bonding; and / or the second fixing portion is fixed to the fourth fixing portion by vulcanization bonding.

9. The flow control device according to claim 7, characterized in that: It also includes a first connecting tube and a second connecting tube, the first connecting tube includes a first tubular portion and a first mounting portion extending from the first tubular portion, the second connecting tube includes a second tubular portion and a second mounting portion extending from the second tubular portion, the first tubular portion, the first cavity and the second tubular portion are connected in sequence, the first mounting portion is fixed to the first fixing portion, at least part of the third fixing portion is located between the first tubular portion and the first fixing portion, the second mounting portion is fixed to the second fixing portion, and at least part of the fourth fixing portion is located between the second tubular portion and the second fixing portion.

10. The flow control device according to claim 9, characterized in that: It also includes a first seal and a second seal, wherein the first seal is located between the first fixing portion and the first mounting portion to fit and seal with the first fixing portion and the first mounting portion, and the second seal is located between the second fixing portion and the second mounting portion to fit and seal with the second fixing portion and the second mounting portion.

11. The flow control device according to claim 10, characterized in that: The first mounting portion is annular and is arranged around the periphery of the first tubular portion, the second mounting portion is annular and is arranged around the periphery of the second tubular portion, the first fixing portion and the second fixing portion are annular and are arranged around the periphery of the first main body portion, the first mounting portion and the first fixing portion are fixed by a first bolt, and the second mounting portion and the second fixing portion are fixed by a second bolt.

12. A refrigeration device, characterized in that: It comprises a compressor, an oil separator and a flow control device as claimed in any one of claims 1 to 11, wherein the first cavity connects the compressor and the oil separator, and the first medium flowing out of the compressor flows into the oil separator through the first cavity.

Images