WO2026017155A1 - 膨胀罐及制冷系统 - Google Patents

膨胀罐及制冷系统

Info

Publication number
WO2026017155A1
WO2026017155A1 PCT/CN2025/109339 CN2025109339W WO2026017155A1 WO 2026017155 A1 WO2026017155 A1 WO 2026017155A1 CN 2025109339 W CN2025109339 W CN 2025109339W WO 2026017155 A1 WO2026017155 A1 WO 2026017155A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
tank body
flange
tank
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/109339
Other languages
English (en)
French (fr)
Inventor
戴旖
王飞冰
姚海勇
周其
王钟
陈永杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202421729583.7U external-priority patent/CN222880439U/zh
Priority claimed from CN202422185442.XU external-priority patent/CN223149318U/zh
Priority claimed from CN202422219237.0U external-priority patent/CN223005149U/zh
Priority claimed from CN202520102254.8U external-priority patent/CN223648651U/zh
Priority claimed from CN202521051398.1U external-priority patent/CN224188800U/zh
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Publication of WO2026017155A1 publication Critical patent/WO2026017155A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/08—Interconnections of wall parts; Sealing means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof

Definitions

  • This application relates to the field of refrigeration system technology, and in particular to an expansion tank and a refrigeration system.
  • An expansion tank typically consists of a tank body and a bladder.
  • the bladder is housed within the tank body, and a gas (such as nitrogen) exists between the bladder and the tank body.
  • a gas such as nitrogen
  • the balloon usually has a port that extends out of the tank, and the port is equipped with a flange.
  • the sealing structure in the related technology is formed by the upper and lower flanges pressing the flange on both sides of the axial direction to form a seal.
  • the sealing performance is insufficient and leakage is still easy to occur.
  • this application provides an expansion tank and a refrigeration system.
  • An expansion tank includes a tank body, a balloon, and a flange assembly.
  • the balloon is installed in the tank body and has an internal cavity.
  • the balloon is coaxially arranged with the tank body and has an inner side near the axis and an outer side away from the axis.
  • the balloon has an opening, and the sidewall forming the opening is bent radially outward to form a first flange.
  • a rib is protruding from the side of the first flange away from the cavity.
  • the flange assembly is connected to the first flange, and the rib is press-fitted into the flange assembly.
  • This application also provides a refrigeration system, which includes an expansion tank.
  • Figure 2 is a schematic diagram of the structure of the balloon of one embodiment of the expansion tank provided in this application.
  • Figure 3 is a schematic diagram of the structure of the first flange of one embodiment of the expansion tank provided in this application.
  • Figure 4 is a structural schematic diagram of one embodiment of the expansion tank provided in this application.
  • Figure 7 is a cross-sectional view of the expansion tank in Figure 6.
  • Figure 8 shows an enlarged view of position B in Figure 7.
  • Figure 9 shows an enlarged cross-sectional view of Figure 8 from another perspective.
  • Figure 10 is a structural schematic diagram of one embodiment of the protective shell provided in this application.
  • Figure 11 is a structural schematic diagram of the protective shell in Figure 10 from another perspective.
  • Figure 12 is a front view of the protective shell in Figure 10.
  • Figure 13 is a structural schematic diagram of one embodiment of the protective shell provided in this application.
  • Figure 14 is a schematic diagram of the structure of the cover in the protective shell in Figure 13.
  • Figure 15 is a schematic diagram of the valve cap structure of the protective shell in Figure 13.
  • Figure 16 is a structural schematic diagram of one embodiment of the protective shell provided in this application.
  • Figure 17 is a schematic diagram of one embodiment of the connection structure of the expansion tank of this application.
  • Figure 18 is an enlarged schematic diagram of part C in Figure 17.
  • Figure 19 is a schematic diagram of the structure before the connection in Figure 1.
  • Figure 20 is a schematic diagram of one embodiment of the connection structure of the expansion tank of this application.
  • Figure 21 is an enlarged schematic diagram of part D in Figure 19.
  • Figure 22 is a schematic diagram of one embodiment of the connection structure of the expansion tank of this application.
  • Figure 23 is a schematic diagram of a refrigeration system in one embodiment of this application.
  • first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.
  • a feature defined as “first” or “second” may explicitly or implicitly include at least one of that feature.
  • “multiple” means at least two, such as two, three, etc., unless otherwise explicitly specified.
  • the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium.
  • “above,” “over,” and “on top” the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.
  • “Below,” “below,” and “under” the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
  • This application provides an expansion tank 100, including a balloon 20 and a tank body 10.
  • the balloon 20 has a protruding rib 231 at the opening 22 that is interference-fitted with a flange assembly 30 to improve the sealing performance of the balloon 20 and the flange assembly 30.
  • the expansion tank 100 works as follows: Gas is placed between the tank body 10 and the balloon 20. When pressurized water enters the balloon 20 of the expansion tank 100, the gas between the balloon 20 and the tank body 10 is compressed. As the gas is compressed, its volume decreases and its pressure increases until the gas pressure equals the water pressure, at which point water intake stops. When the water pressure decreases due to leakage, the gas pressure becomes greater than the water pressure. At this point, the gas expands, squeezing the water out of the balloon 20 and allowing it to flow into the external pipeline.
  • the expansion tank 100 provided in this application includes a tank body 10, a balloon 20, and a flange assembly 30.
  • the balloon 20 is installed inside the tank body 10.
  • the internal structure of the balloon 20 has a cavity 21.
  • the balloon 20 is coaxially arranged with the tank body 10 and has an inner side close to the axis and an outer side away from the axis.
  • the balloon 20 has an opening 22.
  • the sidewall of the balloon 20 forming the opening 22 is bent radially outward to form a first flange 23.
  • a rib 231 protrudes from the end of the first flange 23 away from the cavity 21.
  • the flange assembly 30 is connected to the first flange 23, and the rib 231 is in interference fit with the flange assembly 30.
  • the rib 231 deforms to achieve the effect of a sealing ring, which can fill the gap between the flange assembly 30 and the first flange 23, thereby improving the sealing performance between the flange assembly 30 and the first flange 23 and preventing the problem of medium leakage.
  • the rib 231 is made of a soft material, such as rubber, so that the interference fit produces greater deformation to fill the gap, thereby improving the sealing performance.
  • the rib 231 is arranged circumferentially along the first flange 23 to form an annular protrusion structure.
  • the annular protrusion structure enables the rib 231 to form a circumferential abutment effect with the flange assembly 30, so as to ensure that there are sealing structures and stop structures in all directions between the rib 231 and the flange assembly 30, thereby optimizing the sealing effect.
  • the rib 231 may not be configured as a complete ring in the circumferential direction, but may be configured separately at locations and angles with high leakage risk. This can save materials and the rib 231 has more room for deformation.
  • the canister 10 has a through hole 11.
  • One end of the balloon 20 with an opening 22 extends out of the through hole 11.
  • the edge of the canister 10 forming the through hole 11 is bent radially outward to form a second flange 12.
  • the second flange 12 abuts against the side of the first flange 23 opposite to the rib 231. In this way, the second flange 12 and the first flange 23 increase the connection area, improve the contact area between the port of the canister 10 and the port of the balloon 20, and thus improve the connection sealing.
  • the flange assembly 30 includes a first flange 31 and a second flange 32.
  • the first flange 31 abuts against the side of the first flange 23 facing away from the tank body 10 and is interference-fitted with the raised rib 231.
  • the second flange 32 abuts against the side of the second flange 12 facing away from the first flange 23, and the first flange 31 and the second flange 32 are connected by multiple connectors (not shown).
  • bolts can be used as connectors, while in other embodiments, pins, screws, or other structures can also be used.
  • the side of the tank body 10 with the through hole 11 is defined as the lower side, and the side of the tank body 10 away from the through hole 11 is defined as the upper side. Therefore, the first flange 31 and the second flange 32 abut against the upper side of the second flange 12 and the lower side of the first flange 23, respectively. Both provide clamping force from both the upper and lower directions to ensure the connection strength between the flange assembly 30, the balloon 20, and the tank body 10.
  • the structural strength of the tank body 10 is much greater than that of the balloon 20. Therefore, although the second flange 32 and the tank body 10 are prone to forming a high-pressure line contact during the clamping process due to their 90° angle fit structure, the tank body 10 can still maintain its durability and structural strength, avoiding damage to the balloon 20 caused by the second flange 32 pressing against it.
  • a groove may also be provided on the first flange 31.
  • the groove is provided in correspondence with the rib 231, and the groove width along the radial direction of the first flange 31 is less than the thickness of the rib 231. That is, the groove and the rib 231 are still interference fit to further improve the sealing effect.
  • the first flange 31 has a plurality of bosses 310 on the side facing the second flange 32.
  • the bosses 310 protrude toward the second flange 32, and at least one boss 310 abuts against the first flange 23.
  • the abutment structure between the bosses 310 and the first flange 23 can also increase the sealing effect.
  • bosses 310 are arranged radially at intervals to form a first boss 311 closer to the inner side and a second boss 313 closer to the outer side. This naturally creates a recessed area between the first boss 311 and the second boss 313, which can accommodate the first flange 23, resulting in a tighter fit between the flange assembly 30 and the ball bladder 20.
  • first boss 311 and the second boss 313 also improve the torsional strength of the first flange 31.
  • first flange 23 and the first boss 311 form a surface-to-surface contact.
  • first flange 23 may also simultaneously abut against the first boss 311 and the second boss 313 to further improve the sealing effect.
  • first boss 311 is arranged circumferentially along the inner edge of the opening 22 to form an annular structure and abuts against the inner edge of the opening 22; multiple second bosses 313 are evenly spaced around the first flange 31 along its axial direction, and the second bosses 313 are spaced at a predetermined distance from the outer periphery of the first flange 23 along the radial direction of the first flange 31. This predetermined distance is less than the deformation of the first flange 23 towards the radially outward side.
  • the annular first boss 311 and the first flange 23 can form a circumferential abutment sealing effect, increasing the contact area between the first boss 311 and the first flange 23, and further improving the sealing performance.
  • the material of the balloon 20 is relatively soft, the first flange 23 of the balloon 20 will undergo elastic deformation during the contact process with the first flange 31.
  • This elastic deformation includes inward deformation and outward deformation in the radial direction.
  • the deformation of the first flange 23 towards the radial inward side abuts with the first boss 311, so its deformation direction will tend to be towards the radial outward side.
  • the preset distance provides space for deformation and allows the first flange 23 to abut with the second boss 313 after deformation, thereby improving the sealing effect.
  • a connecting hole 314 is opened between every two adjacent second protrusions 313, and the connector passes through the connecting hole 314. Both ends are connected to the first flange 31 and the second flange 32 respectively, thereby strengthening the connection between the first flange 31 and the second flange 32 and improving the overall structural strength of the flange assembly 30.
  • the edge of the opening 22 has a bevel 221
  • the first protrusion 311 has an abutment surface 3111 on its circumferential outer side near the second protrusion 313.
  • the abutment surface 3111 and the bevel 221 are respectively inclined, and the bevel 221 abuts against the abutment surface 3111.
  • the abutment between the first flange 23 and the first protrusion 311 is tighter, and the opposing movement of the two allows the abutment surface 3111 and the bevel 221 to fit together more tightly, resulting in better sealing.
  • the phrase "should be inclined” means that the slope of the abutment surface 3111 relative to the axis of the tank body 10 is the same as the slope of the bevel 221 relative to the axis of the tank body 10.
  • the first flange 31 is bent outward toward the second flange 32 to form a third flange 312, which abuts against the second flange 32. In this way, the abutment between the third flange 312 and the second flange 32 fixes the spacing between the first flange 31 and the second flange 32, which is convenient for assembly.
  • the first flange 31 and the second flange 32 are subjected to uniform force, and it is easy to operate.
  • a drain outlet 3121 is provided on the third flange 312, and the drain outlet 3121 penetrates through the third flange 312.
  • the third flange 312 is set upward (that is, the expansion tank 100 is placed according to Figure 1), the third flange 312 on the first flange 31 is prone to water storage. If water is stored for a long time, it is easy to cause the flange assembly 30 to rust, affecting its durability. Therefore, adding a drain outlet can greatly reduce the risk of rust and extend the service life of the expansion tank 100.
  • this application adds a raised rib 231 to the first flange 23 at the opening 22 of the balloon 20, allowing the raised rib 231 to abut against the first flange 31 to achieve an effect similar to a sealing ring.
  • This improves the sealing performance between the balloon 20 and the flange assembly 30, thereby preventing media leakage.
  • the first flange 31 and the second flange 32 abut against the first flange 23 of the balloon 20 and the second flange 12 of the tank body 10, respectively.
  • the stress generated will act on the structurally strong tank body 10, thus preventing damage to the balloon 20 and extending the service life of the expansion tank 100.
  • the sealing performance of the expansion tank directly determines the long-term stability and safety of the system.
  • Traditional expansion tanks have a valve needle assembly structure installed at the top of the cylinder.
  • the body seal between the cylinder and the valve needle assembly structure often uses a rubber sealing ring or O-ring compression structure, which fills the gap between the valve needle assembly structure and the air inlet on the cylinder through elastic deformation to achieve a seal.
  • this method of achieving a seal through sealing rings still leaves a very small gap, and the pre-charge gas inside the expansion tank will still leak at a very slow rate. This situation necessitates the annual replenishment of the pre-charge gas inside the expansion tank.
  • the sealing rings and O-rings may also deform, easily leading to seal failure. After the above-mentioned seal failure, pre-charge gas leakage will occur inside the expansion tank, and pre-charge gas leakage will cause product performance failure.
  • this application also provides an expansion tank 100, which further includes a filling valve 40 connected to the tank body 10 by a welding process.
  • the welding connection can avoid failure caused by vibration, temperature change, thermal shock and other factors; and the welding connection is more robust and reliable through the mutual penetration between materials.
  • An expansion tank 100 also includes a filling valve 40.
  • the tank body 10 has a chamber 101.
  • An assembly part 111 is provided on the top of the tank body 10.
  • the assembly part 111 has an air inlet 15 that communicates with the chamber 101.
  • the filling valve 40 includes a valve seat 41 and a valve needle assembly 43.
  • a welding structure is provided between the valve seat 41 and the assembly part 111, and the valve seat 41 and the assembly part 111 are sealed together by the welding structure.
  • the valve needle assembly 43 moves within the valve seat 41 to open or block the air inlet 15, so as to change the communication state or isolation state between the chamber 101 and the outside of the tank body 10.
  • gas is injected into chamber 101 through filling valve 40 to complete the pre-filling process.
  • the welded structure is formed through a welding process; the welded structure is formed after the solder melts, and the welding improves the sealing between filling valve 40 and the top of tank 10.
  • the welding penetrates and connects the various structures through gaps, resulting in a stronger connection between filling valve 40 and tank 10, and a greater ability to withstand vibrations and temperature changes during the operation of expansion tank 100.
  • the welded structure is formed using a high-frequency welding process.
  • the high-frequency welding process can be replaced by laser welding.
  • the welding sealing method can prevent internal gas leakage, which is significantly different from the soft-seal structure used in traditional expansion tanks 100.
  • the expansion tank 100 provided in this embodiment has a helium leakage rate of less than 4*10(-9) Pa*m3/S at low temperatures.
  • High-frequency welding generates a skin effect at the welding interface through high-frequency induced current, rapidly heating only in the contact area between the filling valve 40 and the gas inlet 15, avoiding thermal damage to the internal diaphragm or bladder of the expansion tank 100 caused by overall heat input.
  • the top of the tank body 10 is recessed inward to form an assembly part 111
  • the air inlet 15 is opened at the bottom of the assembly part 111
  • a welded structure is formed on the side of the assembly part 111 facing away from the chamber 101, with the valve seat 41 abutting against the welded structure.
  • the assembly part 111 can facilitate the full penetration of the solder into the gap between the two, and can also increase the actual welding area between the two, thereby improving the sealing and fixing effect.
  • the assembly part 111 may not be provided, and the air inlet 15 may be directly formed by the arc-shaped tank body 10.
  • the edge of the inlet 15 bends away from the chamber 101, forming an annular protrusion 112.
  • the end face of the annular protrusion 112 away from the chamber 101 is higher than the top of the tank body 10.
  • the annular protrusion 112 can block the flow of solder, preventing solder from flowing from the inlet 15 into the interior of the chamber 101 and affecting the use of the expansion tank 100.
  • the top of the tank body 10 refers to the end of the tank body 10 closest to the filling valve 40 along the axial direction of the tank body 10, that is, the upper side of the tank body 10.
  • At least a portion of the cross-section of the assembly portion 111 is arc-shaped, trapezoidal, or stepped. This facilitates solder flow and allows for easy installation and contact with the filling valve 40.
  • the depth of the assembly part 111 is 0.5mm-2mm, and along the radial direction of the tank body 10, the width of the assembly part 111 is 1mm-3mm.
  • This design prevents the assembly part 111 from being too shallow to effectively guide the solder flow, while also avoiding the problem of the assembly part 111 being too deep, which would make the tank body 10 difficult to manufacture and affect its structural strength.
  • setting the width of the assembly part 111 within a reasonable range ensures its technical effectiveness while minimizing its impact on the manufacturing process and structural strength of the tank body 10.
  • the depth of the assembly part 111 can be set to 1.0mm, 1.5mm, 1.7mm, etc.
  • the width of the assembly part 111 can be set to 1mm, 1.5mm, 2.4mm, etc., and is not limited to the above-mentioned endpoint values.
  • the tank body 10, the air inlet 15, and the assembly part 111 are all coaxially arranged.
  • the expansion tank 100 has better overall integrity.
  • the tank 10 includes a first tank 13 and a second tank 14, which are arranged opposite to each other and sealed by welding to form the tank 10.
  • the balloon 20 is located in the chamber 101 formed by the first tank 13 and the second tank 14 and is in communication with the external medium.
  • the separate composite structure of the first tank 13 and the second tank 14 allows for separate processing to reduce manufacturing complexity.
  • the filling valve 40 further includes a valve cover 42, which is threadedly connected to the valve seat 41 and covers and seals the end of the valve seat 41 away from the tank body 10.
  • the valve cover 42 can protect the filling valve 40 from external environmental influences and extend its service life.
  • valve cover 42 can also be fixed by connecting to the tank body 10 to protect the internal valve seat 41 and valve needle assembly 43, or connected to the valve seat 41 by interference fit, snap-fit, or other means, and is not limited to the threaded fit described above.
  • the cover when the filling valve with a cover is not in use, the cover is usually fastened to the side of the valve seat away from the tank body to seal the valve seat.
  • the filling valves in related technologies are usually single seals, and the cover can only stop the gas flow and cannot provide an auxiliary seal. If the seal of the filling valve itself fails, the leaked gas will still leak out from the gap between the cover and the seat, eventually leading to damage or failure of the expansion tank.
  • This application also provides an expansion tank 100 with an air inlet 15 at the top of the tank body 10 in some embodiments.
  • the expansion tank 100 also includes a filling valve 40, which is installed at the air inlet 15 and connected to the air inlet 15 for injecting gas into the tank body 10.
  • the filling valve 40 includes a valve seat 41, a valve cover 42, and a valve needle assembly 43.
  • the valve seat 41 is sealed to the tank body 10, and the valve needle assembly 43 is movably installed in the valve seat 41 to open or block the air inlet 15.
  • valve needle assembly 43 is disposed inside the valve seat 41 and has an openable and closable valve port 4301.
  • the outer periphery of the valve needle assembly 43 is sealed to the inner wall of the cavity of the valve seat 41.
  • the valve cover 42 is detachably fastened to one end of the valve seat 41. When the valve cover 42 is installed on the valve seat 41, the inner wall of the cavity of the valve cover 42 is sealed to the outer periphery of the valve seat 41.
  • the valve cover 42 when the filling valve 40 of the expansion tank 100 is not in use, the valve cover 42 is installed on the valve seat 41.
  • the filling valve 40 prevents gas leakage through the double seal of the valve seat 41, the valve needle assembly 43, and the valve cover 42.
  • the operator removes the valve cover 42.
  • the filling valve 40 prevents gas leakage during the filling process through the seal of the valve seat 41 and the valve needle assembly 43. This configuration, through double sealing, enables the filling valve 40 to effectively prevent gas leakage when not in use.
  • valve cover 42 and the valve seat 41 are detachably abutted together, forming an annular sealing region 401 surrounding the cavity of the valve needle assembly 43.
  • a hard seal is used between the valve cover 42 and the valve seat 41 in this embodiment, which provides a more reliable seal compared to a soft seal. This enhances the sealing performance of the filling valve 40, ensuring that gas will not leak from the connection between the valve cover 42 and the valve seat 41 under high pressure or other conditions, thus improving the service life of the filling valve 40 and the overall stability of the system.
  • the inner wall of the cavity of the valve cover 42 has internal threads, and at least a portion of the outer periphery of the valve seat 41 has external threads, with the valve cover 42 and the valve seat 41 being threadedly connected.
  • the bottom wall of the cavity of the valve cover 42 abuts against the end of the valve seat 41 to form an annular sealing region 401; or, the inner wall of the cavity of the valve cover 42 abuts against the outer periphery of the valve seat 41 to form an annular sealing region 401.
  • This arrangement facilitates the disassembly and assembly of the valve cover 42 and the tight abutment between the valve cover 42 and the valve seat 41, ensuring the reliability of the annular sealing region 401 formation and the sealing effect between the valve cover 42 and the valve seat 41.
  • the outer periphery of the valve seat 41 has a first annular stop step 4121' or a first annular stop surface 4121 that is inclined relative to the axis of the valve seat 41, and one side of the cavity opening of the valve cover 42 abuts against the first annular stop step 4121' or the first annular stop surface 4121 to form an annular sealing area 401.
  • valve cover 42 and valve seat 41 This configuration enables the valve cover 42 and valve seat 41 to abut and seal in the axial direction, which helps to limit the sealing position and ensure the reliability of the abutment seal.
  • This configuration further ensures the axial sealing between the valve cover 42 and the valve seat 41, as well as the reliability of the sealing. It also facilitates the corresponding installation of the valve cover 42 and the valve seat 41 (i.e., the correspondence between the first annular stop step 4121' or the first annular stop surface 4121 and the second annular stop step 4201 or the second annular stop surface 4201'), ensuring both the installation effect and the sealing effect.
  • the valve seat 41 includes a first mating section 411, a transition section 412, and a second mating section 413 connected sequentially.
  • the outer diameter of the second mating section 413 is larger than that of the first mating section 411.
  • At least part of the outer diameter of the transition section 412 gradually decreases in the direction from the second mating section 413 toward the first mating section 411, forming a first annular stop surface 4121.
  • the valve cover 42 is detachably fastened to the end of the first mating section 411 opposite to the second mating section 413.
  • One side of the cavity opening of the valve cover 42 abuts against the first annular stop surface 4121 on the transition section 412 to form an annular sealing area 401.
  • This arrangement not only ensures and improves the sealing effect but also facilitates the forming of the first annular stop surface 4121 and simplifies the assembly process of the filling valve 40, thereby reducing processing and maintenance costs.
  • the inner diameter of the cavity of the adapter section 421 is adapted to the outer diameter of the first mating section 411.
  • the inner wall of the cavity of the adapter section 421 has an internal thread, and the outer periphery of the first mating section 411 has an external thread.
  • the transition section 412 is divided into a variable diameter section and a constant diameter section.
  • the constant diameter section is connected to the second mating section 413, and the variable diameter section is connected to the first mating section 411.
  • the radial dimension of the variable diameter section gradually increases in the direction from the first mating section 411 to the second mating section 413 and forms a first annular stop surface 4121.
  • the outer diameter of the constant diameter section is adapted to the inner diameter of the limiting section 423.
  • the annular abutment section 422 When installing the valve cover 42, the annular abutment section 422 is fastened to the top of the valve seat 41 and gradually screwed in until the abutment tip 4221 abuts against the first annular stop surface 4121 and cannot be screwed in further and is tightened.
  • the limiting section 423 and the constant diameter section of the transition section 412 are limited and fitted, thus completing the installation of the valve cover 42.
  • This configuration through the tight contact between the abutting corner 4221 and the first annular stop surface 4121, forms a high-strength annular sealing line, effectively preventing gas leakage.
  • the structure at the second annular stop step 4201 and the first annular stop surface 4121 can be made of metal or similar materials, which is beneficial for further improving the high-temperature and high-pressure resistance of the sealing position.
  • the seal between the valve cover 42 and the valve seat 41 may not be achieved through the hard contact seal described above.
  • the filling valve 40 may also include a first annular seal, and the inner wall of the cavity of the valve cover 42 may be sealed to the outer periphery of the valve seat 41 through the first annular seal.
  • the filling valve 40 also includes a second annular seal 44 disposed on the outer periphery of the valve needle assembly 43.
  • the valve needle assembly 43 is sealed to the inner wall of the cavity of the valve seat 41 through the second annular seal 44.
  • the second annular seal 44 has a certain degree of flexibility, that is, the valve needle assembly 43 and the valve seat 41 are softly sealed through the second annular seal 44, ensuring the reliability of the seal between the valve needle assembly 43 and the valve seat 41.
  • the valve needle assembly 43 includes a valve housing 431 and a valve needle body 432 movably disposed within the valve housing 431.
  • the valve housing 431 is disposed within the valve seat 41 and seals against the inner wall of the valve seat 41.
  • the valve port 4301 is located at the end of the valve housing 431.
  • the end of the valve needle body 432 has a sealing member 433 to block or open the valve port 4301.
  • valve housing 431 of the valve needle assembly 43 has an injection port 4302 at its top.
  • the valve cover 42 can be removed first, and then the valve needle body 432 and the sealing member 433 can be pressed down to open the valve port 4301. Gas is injected into the valve seat 41 through the top opening. The gas enters the valve housing 431 through the injection port 4302 and flows out from the valve port 4301, and then enters the chamber 101 of the tank 10 through the air inlet 15.
  • This design allows the valve needle assembly 43 to precisely control the filling and release of gas, making it suitable for occasions requiring precise gas control.
  • the valve housing 431 has external threads on at least a portion of its outer periphery, and the valve seat 41 has corresponding internal threads on its inner wall, forming a threaded connection between the valve housing 431 and the valve seat 41.
  • This design facilitates the installation of the valve needle assembly 43 within the valve seat 41 and also ensures the press-fitting of the second annular seal 44, guaranteeing a tight seal.
  • an expansion tank which further includes a protective shell 50.
  • the top of the tank body 10 with an air inlet 15 is a convex arc surface.
  • a first limiting structure 19 is provided at the air inlet.
  • a second limiting structure 4131 is provided at the end of the valve seat 41 of the filling valve 40 away from the valve cover 42.
  • the valve seat 41 of the filling valve 40 is installed at the air inlet and the first limiting structure 19 and the second limiting structure 4131 limit each other.
  • the protective shell 50 is fastened to the filling valve 40 and abuts against the top outer wall of the tank body 10.
  • the cooperation of the first limiting structure 19 and the second limiting structure 4131 facilitates the positioning and installation of the filling valve 40 on the tank body 10.
  • the protective shell 50 protects the filling valve 40 when not in use, preventing damage from external environmental factors.
  • the convex arc-shaped top of the tank body 10 in this embodiment helps prevent the expansion tank 100 from deforming due to excessive pressure, thereby ensuring the service life and quality of the expansion tank 100.
  • valve core assembly For equipment with a filling valve (valve core assembly), when the dust cap is used to protect the filling valve from dust, the valve cover needs to be screwed onto the external thread of the valve seat first, and then the dust cap is put on the valve cover. When performing the filling operation, the valve cover needs to be removed first. If the rotation method is used, the dust cap will rotate relative to the valve cover, making it inconvenient to remove the valve cover and the dust cap at the same time. Instead, the dust cap needs to be pulled off the valve cover first, and then the valve cover needs to be unscrewed off the valve seat. The disassembly and assembly process is relatively complicated.
  • this application also provides expansion tanks 100.
  • the expansion tank 100 is further provided with a protective shell 50.
  • the filling valve 40 of the expansion tank 100 includes a valve seat 41 and a valve needle assembly 43.
  • the protective shell 50 includes a cover 51 and a valve cap 52.
  • the cover 51 and the valve cap 52 are fixedly connected to restrict relative rotation between the cover 51 and the valve cap 52.
  • the valve cap 52 is provided with an internal thread 521 for connection with the external thread of the filling valve 40. That is, the mutually independent valve cover and dust cap are set as a fixedly connected protective shell to effectively simplify the installation structure and facilitate assembly and disassembly.
  • the protective shell 50 provided in this embodiment can install the valve cap 52 on the external thread of the valve seat 41 of the filling valve 40 by providing an internal thread 521 on the valve cap 52. Since the cover 51 and the valve cap 52 are fixedly connected, the cover 51 and the valve cap 52 will not rotate relative to each other. During installation, the cover 51 and the valve cap 52 can be installed together on the valve seat 41. When disassembly is required, the cover 51 and the valve cap 52 can also be unscrewed from the valve seat 41 by rotation, which simplifies the installation process and improves assembly efficiency.
  • the top of the tank body 10 is provided with an air inlet 15, the filling valve 40 is installed at the air inlet 15 and connected to the air inlet 15, the valve seat 41 of the filling valve 40 is sealed to the tank body 10, and the valve needle assembly 43 is movably installed in the valve seat 41 to open or block the air inlet 15, so as to change the communication state or isolation state between the chamber of the tank body 10 and the outside of the tank body 10.
  • the external thread is provided on the outer peripheral wall of the valve seat 41.
  • the internal thread of the valve cap 52 is connected to the external thread of the valve seat 41 of the filling valve 40.
  • the protective housing 50 is used to be installed on the valve seat 41 of the expansion tank 100, and is capable of being dustproof and waterproof.
  • the protective housing 50 may also be installed on the valve needle assembly 43 of other devices.
  • the fixed connection between the cover 51 and the valve cap 52 can include a detachable fixed connection or a non-detachable fixed connection.
  • the protective shell 50 includes a cover 51 and a valve cap 52; the cover 51 and the valve cap 52 are an integral structure, in other words, the cover 51 and the valve cap 52 can be integrally formed during manufacturing.
  • the valve cap 52 is provided with an internal thread 521 for connection with the external thread of the valve needle assembly 43.
  • the cover 51 is frustum-shaped, having a top surface 511 and a bottom surface 512.
  • the diameter of the top surface 511 is smaller than the diameter of the bottom surface 512.
  • the top surface 511 is planar, and the bottom surface 512 has a receiving cavity 5121, within which at least a portion of the valve cap 52 is located.
  • valve cap 52 is entirely located within the receiving cavity 5121.
  • a portion of the valve cap 52 may extend outside the cover 51, meaning one end of the valve cap 52 is located outside the receiving cavity 5121.
  • valve cap 52 extends outside the cover 51 can be selected according to the specific structure and installation form of the valve seat 41 in the equipment with the filling valve 40 (e.g., expansion tank 100).
  • a reinforcing rib 513 is provided between the cover 51 and the valve cap 52.
  • the reinforcing rib 513 has a triangular plate-like structure.
  • the first side 5131 of the reinforcing rib 513 is attached to the inner surface of the cover 51
  • the second side 5132 of the reinforcing rib 513 is attached to the outer surface of the valve cap 52
  • the third side 5133 of the reinforcing rib 513 is supported between the cover 51 and the valve cap 52.
  • reinforcing ribs 513 which are triangular plate-shaped structures
  • the pressure resistance of the protective shell 50 can be improved, and the impact of external forces on the expansion tank 100 can be reduced.
  • connection strength between the valve cap 52 and the cover 51 can be increased, thereby improving the overall structural strength of the protective shell 50.
  • valve cap 52 can be a hollow cylindrical structure.
  • the valve cap 52 is coaxially arranged with the cover 51.
  • the reinforcing ribs 513 have a plate-like structure. There are multiple reinforcing ribs 513. The multiple reinforcing ribs 513 are arranged at intervals along the circumference of the valve cap 52.
  • the number of reinforcing ribs 513 can be six, and the six reinforcing ribs 513 are evenly spaced along the circumference of the valve cap 52.
  • the circumferential surface of the cover 51 is provided with a plurality of recesses 514 formed from the outer surface inward, and the plurality of recesses 514 are spaced apart circumferentially.
  • This arrangement not only conforms to ergonomics but also reduces material usage and lowers costs.
  • the number of recesses 514 in this embodiment is six, and the six recesses 514 are evenly spaced apart circumferentially along the cover 51.
  • the inner surface of the recesses 514 can be a spherical cap surface.
  • the protective housing 50 includes a cover 51 and a valve cap 52; the cover 51 is provided with a connecting portion 515, and the connecting portion 515 is provided with a receiving groove 5152; the valve cap 52 is installed in the receiving groove 5152, the outer surface of the valve cap 52 is provided with an anti-rotation portion 522, and the groove wall of the receiving groove 5152 is provided with an anti-rotation mating portion 5151, the anti-rotation mating portion 5151 and the anti-rotation portion 522 cooperate to restrict the cover 51 from rotating relative to the valve cap 52; the valve cap 52 is provided with an internal thread 521 for connecting with the external thread of the valve needle assembly 43.
  • the connecting part 515 and the cover 51 are integrally formed.
  • the cover 51 is frustum-shaped, having a top surface 511 and a bottom surface 512.
  • the diameter of the top surface 511 is smaller than the diameter of the bottom surface 512.
  • the top surface 511 is planar, and the bottom surface 512 has a receiving cavity 5121, with at least a portion of the connecting portion 515 located within the receiving cavity 5121.
  • the connecting portion 515 is located inside the cover 51, and the end face of the valve cap 52 away from the bottom of the receiving groove 5152 is flush with the end face of the connecting portion 515 where the receiving groove 5152 is located. It can be understood that in other embodiments, the end face of the valve cap 52 away from the bottom of the receiving groove 5152 may also be located outside the receiving groove 5152.
  • valve cap 52 extends outside the receiving groove 5152 can be selected according to the specific structure and installation form of the valve seat 41 in the equipment with the filling valve 40 (e.g., expansion tank 100).
  • the anti-rotation part 522 and the anti-rotation mating part 5151 are non-circular arc surfaces that cooperate with each other.
  • valve cap 52 forms an anti-rotation portion 522, and the cross-sectional shape of the valve cap 52 can be elliptical.
  • the contour of the groove wall of the receiving groove 5152 is adapted to the ellipse.
  • the shape of the cross-section of the valve cap 52 is not limited to an ellipse, but can also be a polygon or other irregular shape, as long as at least a portion of the surface of the valve cap 52 is not an arc surface.
  • the anti-rotation part 522 is a hexagonal prism
  • the cross-sectional shape of the groove wall of the receiving groove 5152 is hexagonal
  • at least a part of the groove wall of the receiving groove 5152 forms an anti-rotation mating part 5151, and the anti-rotation part and the anti-rotation mating part are fitted together.
  • the anti-rotation portion 522 is the circumferential outer surface of the valve cap 52, which can be a hexagonal prism structure with internal threads 521.
  • the anti-rotation portion 522 can be a part of the circumferential outer surface of the valve cap 52.
  • the valve cap 52 can include a coaxially arranged hexagonal prism structure and a cylindrical structure, wherein the hexagonal prism structure is located inside the receiving groove 5152, and the cylindrical structure can be located outside the receiving groove 5152, or even outside the cover. Both the cylindrical structure and at least a portion of the hexagonal prism structure are provided with internal threads.
  • valve cap 52 is located within the receiving cavity 5121, and another portion is located outside the cover 51. In other embodiments, the valve cap 52 may also be located entirely within the receiving cavity 5121.
  • valve cap 52 extends outside the cover can be selected according to the specific structure and installation form of the valve seat 41 in the equipment with the filling valve 40 (such as the expansion tank 100).
  • one of the anti-rotation part 522 and the anti-rotation mating part 5151 is a protrusion and the other is a groove.
  • the anti-rotation part 522 can be a protrusion provided on the circumferential surface of the valve cap 52, and the anti-rotation mating part 5151 can be a groove provided on the groove wall of the receiving groove 5152.
  • the protrusion is limited to the groove, thereby preventing the cover 51 from rotating relative to the protective cover.
  • the protective cover and the connecting part 515 can be interference-fitted.
  • a reinforcing rib 513 is provided between the cover 51 and the connecting part 515.
  • the reinforcing rib 513 has a triangular plate-shaped structure.
  • the first side 5131 of the reinforcing rib 513 is attached to the inner surface of the cover 51
  • the second side 5132 of the reinforcing rib 513 is attached to the outer surface of the connecting part 515
  • the third side 5133 of the reinforcing rib 513 is supported between the cover 51 and the connecting part 515.
  • reinforcing ribs 513 which are triangular plate-shaped structures, the structural strength of the protective shell 50 can be improved, thereby improving the pressure resistance of the protective shell 50 and reducing the impact of external forces on the expansion tank 100.
  • the outer surface of the connecting part 515 is a cylindrical surface
  • the connecting part 515 is coaxially arranged with the cover 51, and there are multiple reinforcing ribs 513, which are spaced apart along the circumference of the connecting part 515.
  • the number of reinforcing ribs 513 can be six, and the six reinforcing ribs 513 are evenly spaced along the circumference of the connecting portion 515.
  • the expansion tank 100 can be installed by mounting the protective shell 50 together with the cover 51 and the valve cap 52 on the valve seat 41 of the filling valve 40.
  • the cover 51 and the valve cap 52 can also be unscrewed from the valve seat 41 by rotation, which simplifies the installation process and improves the assembly efficiency.
  • the expansion tank 100 includes a first tank body 13 and a second tank body 14.
  • the open ends of the first tank body 13 and the second tank body 14 are connected to form a cylindrical tank body by a connecting structure 16.
  • the connecting structure 16 includes a first tank body docking portion 131 and a second tank body docking portion 141. Both the first tank body docking portion 131 and the second tank body docking portion 141 are extended rings extending away from the axis of the expansion tank 100.
  • the bending angle of the lower sidewall of the first tank 13 away from the expansion tank 100 is the same as the bending angle of the upper sidewall of the second tank 14 away from the expansion tank 100.
  • Those skilled in the art can select the bending angle according to the actual situation. In this example, for ease of welding, the bending angle can be selected as 90°.
  • multiple sets of positioning protrusions 102 and positioning recesses 103 are provided on the opposing surfaces of the first tank docking portion 131 and the second tank docking portion 141.
  • the positioning protrusions 102 and positioning recesses 103 in each set are arranged vertically opposite each other, and are adapted to each other and embedded together.
  • the embedded connection of multiple sets of positioning protrusions 102 and positioning recesses 103 allows for precise fixing and restriction of the relative positions of the first tank 13 and the second tank 14 before welding, and ensures that the positions of the first tank 13 and the second tank 14 remain unchanged during welding, facilitating welding and improving work efficiency.
  • the number of sets of positioning protrusions 102 and positioning recesses 103 is not less than two, and the multiple sets of positioning protrusions 102 and positioning recesses 103 are evenly arranged on the outer periphery of the expansion tank 100, further improving the positioning accuracy of the first tank 13 and the second tank 14.
  • the positioning protrusion 102 can be of any shape, as long as it cooperates with the positioning recess 103 to position the first tank 13 and the second tank 14. Those skilled in the art can choose the appropriate shape according to actual needs.
  • the positioning protrusion 102 can be hemispherical.
  • the hemispherical positioning protrusion 102 has a simple structure, and this design can improve production efficiency.
  • the dimensions of the hemispherical positioning protrusion 102 are determined based on the radial width of the docking part where the hemispherical positioning protrusion 102 is located and the wall thickness of the tank body where the positioning recess 103 is located. In principle, the diameter of the hemispherical positioning protrusion 102 must be smaller than the radial width of the docking part where the hemispherical positioning protrusion 102 is located.
  • the tank body 10 of the expansion tank 100 includes a first tank body 13 and a second tank body 14.
  • the open ends of the first tank body 13 and the second tank body 14 are connected to form a cylindrical tank body by a connecting structure 16.
  • the connecting structure 16 includes a first tank body bending portion 132 and a second tank body bending portion 142.
  • the bending point of the second tank body bending portion 142 is a smooth rounded corner transition.
  • the second tank body bending portion 142 is located inside the first tank body bending portion 132, and the outer surface of the second tank body bending portion 142 is fixedly connected to the inner surface of the first tank body bending portion 132.
  • the second tank body bending portion 142 is configured such that the upper sidewall of the second tank body 14 bends outward from the tank body 10 at a certain angle.
  • the size of the angle is not limited in this application, as long as it is the same as the bending angle and bending direction of the portion of the first tank body bending portion 132 that is connected to it.
  • the first tank bending portion 132 includes an inclined portion 104 that bends downward toward the outside of the expansion tank 100 and a vertical portion 105 located at the lower end of the inclined portion 104.
  • the upper part of the inclined portion 104 is integrally formed and connected to the lower end face of the first tank 13.
  • the second tank bending portion 142 is configured as a U-shaped portion 106 formed by bending the second tank 14 toward the outside of the expansion tank 100 by 180°.
  • the opposite side walls of the two side rods of the U-shaped portion 106 are tightly attached.
  • One side rod of the U-shaped portion 106 is integrally connected to the upper end face of the second tank 14 by an integral connection structure 16, that is, integrally formed connection.
  • the upper side wall of the second tank bending portion 142 bends 90° toward the outside of the tank.
  • the free end of the outer rod of the U-shaped portion is welded and fixedly connected to the free end of the vertical portion.
  • the tilt angle of the inclined portion 104 relative to the inner wall of the first tank or the second tank is determined according to the side wall thickness of the first tank and the second tank, ensuring that the outer wall of the outer rod of the U-shaped portion 106 is in close contact with the inner wall of the vertical portion.
  • the structural positions of the first tank bending portion 132 and the second tank bending portion 142 can be interchanged. That is, the second tank bending portion 142 includes an inclined portion 104 that bends upwards towards the outside of the expansion tank 100 and a vertical portion 105 located at the upper end of the inclined portion 104.
  • the lower end of the inclined portion 104 is integrally connected to the upper end face of the second tank 14 by an integral connection structure 16, that is, integrally formed connection.
  • the first tank bending portion 132 is a U-shaped portion 106 formed by bending the lower part of the first tank 13 towards the outside of the expansion tank 100 by 180°.
  • the opposite side walls of the two rods on both sides of the U-shaped portion 106 are tightly attached.
  • One side rod of the U-shaped portion 106 is integrally formed connected to the lower end face of the first tank 13.
  • the free end of the outer rod of the U-shaped portion 106 is welded and fixedly connected to the free end of the vertical portion 105.
  • this application also provides a refrigeration system 200, including the expansion tank 100 as described above. It is understood that the refrigeration system possesses the advantages of the expansion tank 100 in the above embodiments, with superior service life and safety.

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  • General Engineering & Computer Science (AREA)
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  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

膨胀罐(100)及制冷系统(200)。膨胀罐(100)包括罐体(10)、球囊(20)和法兰组件(30)，球囊(20)安装于罐体(10)内，球囊(20)的内部构造有囊腔(21)，球囊(20)与罐体(10)同轴设置且球囊(20)具有靠近轴线方向的内侧和远离轴线方向的外侧，球囊(20)具有囊口(22)，球囊(20)形成囊口(22)的侧壁朝着径向外侧弯折以形成第一翻边(23)，第一翻边(23)远离囊腔(21)的侧面凸设有凸筋(231)；法兰组件(30)与第一翻边(23)连接，且凸筋(231)与法兰组件(30)过盈抵接。

Description

膨胀罐及制冷系统
相关申请
本申请要求2024年9月10日申请的，申请号为202422219237.0，发明名称为“膨胀罐”，2025年5月26日申请的，申请号为202521051398.1，发明名称为“膨胀罐及其制冷系统”，2025年1月15日申请的，申请号为202520102254.8，发明名称为“充注阀及膨胀罐”，2024年7月19日申请的，申请号为202421729583.7，发明名称为“防护结构及膨胀罐”以及2024年9月5日申请的，申请号为202422185442.X，发明名称为“一种膨胀罐连接结构及膨胀罐”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及制冷系统技术领域，特别是涉及一种膨胀罐及制冷系统。
背景技术
膨胀罐通常包括罐体和球囊，球囊设置于罐体中，球囊与罐体之间具有气体(例如氮气)，当外界有压力的水进入膨胀罐球囊内时，球囊与罐体之间的气体被压缩，气体受到压缩后体积变小压力升高，直到气体压力与水的压力达到一致时停止进水。当水流失压力减低时气体压力大于水的压力，此时气体产生压力将球囊内的水挤出并流向外部管路。
球囊通常有端口伸出罐体，且端口处设置有翻边，相关技术中的密封结构由上下两块法兰挤压翻边的轴向两侧形成密封，但是密封性能不足，依然容易出现泄漏的问题。
发明内容
基于此，本申请提供一种膨胀罐及制冷系统。
一种膨胀罐，包括罐体、球囊以及法兰组件；所述球囊安装于所述罐体内，所述球囊的内部构造有囊腔，所述球囊与所述罐体同轴设置且所述球囊具有靠近轴线方向的内侧和远离轴线方向的外侧，所述球囊具有囊口，所述球囊形成所述囊口的侧壁朝着径向外侧弯折以形成第一翻边，所述第一翻边远离所述囊腔的侧面凸设有凸筋；所述法兰组件与所述第一翻边连接，且所述凸筋与所述法兰组件过盈抵接。
本申请还提供有制冷系统，所述制冷系统包括膨胀罐。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本申请提供的膨胀罐的其中一个实施例的结构剖视图。
图2为本申请提供的膨胀罐的其中一个实施例的球囊的结构示意图。
图3为本申请提供的膨胀罐的其中一个实施例的第一法兰的结构示意图。
图4为本申请提供的膨胀罐的其中一个实施例的结构示意图。
图5为图4中的A处局部放大图。
图6为本申请提供的膨胀罐的其中一个实施例的结构示意图。
图7为图6中膨胀罐的剖视图。
图8示出了图7中B位置的放大图。
图9示出了图8中在另一视角下的剖视放大图。
图10为本申请提供的防护壳的其中一个实施例的结构示意图。
图11为图10中防护壳在另一视角的结构示意图。
图12为图10中防护壳的主视图。
图13为本申请提供的防护壳的其中一个实施例的结构示意图。
图14为图13中防护壳中的罩体的结构示意图。
图15为图13中防护壳的阀帽的结构示意图。
图16为本申请提供的防护壳的其中一个实施例的结构示意图。
图17为本申请膨胀罐的连接结构的其中一个实施例的结构示意图。
图18为图17中C部分放大示意图。
图19为图1中连接结构连接前的结构示意图。
图20为本申请膨胀罐的连接结构的其中一个实施例的结构示意图。
图21为图19中D部分放大示意图。
图22为本申请膨胀罐的连接结构的其中一个实施例的结构示意图。
图23为本申请一实施例中制冷系统的示意图。
图中各符号表示含义如下：
100、膨胀罐；10、罐体；101、腔室；102、定位凸点；103、定位凹点；104、倾斜部；105、竖向部；106、U型部；11、通孔；12、第二翻边；13、第一罐体；14、第二罐体；15、进气口；16、连接结构；19、第一限位结构；111、装配部；112、环形凸起；131、第一罐体对接部；141、第二罐体对接部；132、第一罐体弯折部；142、第二罐体弯折部；20、球囊；21、囊腔；22、囊口；221、斜面；23、第一翻边；231、凸筋；30、法兰组件；31、第一法兰；310、凸台；311、第一凸台；3111、抵接面；312、第三翻边；3121、排水口；313、第二凸台；314、连接孔；32、第二法兰；40、充注阀；401、环形密封区域；41、阀座；411、第一配合段；412、过渡段；4121、第一环形止挡面；4121’、第一环形止挡台阶；413、第二配合段；4131、第二限位结构；42、阀盖；421、转接筒段；422、环形抵接段；4221、抵接尖角；423、限位段；4201、第二环形止挡台阶；4201’、第二环形止挡面；43、阀针组件；4301、阀口；4302、注气口；431、阀壳；432、阀针本体；433、封堵件；44、第二环形密封件；50、防护壳；51、罩体；511、顶面；512、底面；5121、容纳腔；513、加强筋；5131、第一侧边；5132、第二侧边；5133、第三侧边；514、凹陷部；515、连接部；5151、防转配合部；5152、容纳槽；52、阀帽；521、内螺纹；522、防转部；200、制冷系统。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本申请。但是本申请能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似改进，因此本申请不受下面公开的具体实施例的限制。
需要说明的是，当机构被称为“固定于”或“设置于”另一个机构，它可以直接在另一个机构上或者也可以存在居中的机构。当一个机构被认为是“连接”另一个机构，它可以是直接连接到另一个机构或者可能同时存在居中机构。本申请的说明书所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”、“下”可以是第一特征直接和第二特征接触，或第一特征和第二特征间接地通过中间媒介接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅表示第一特征水平高度小于第二特征。
除非另有定义，本申请的说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本申请的说明书所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请提供一种膨胀罐100，包括球囊20和罐体10，通过球囊20的囊口22处凸设的凸筋231与法兰组件30过盈配合，以提高球囊20与法兰组件30的密封性能。
需要解释的是，膨胀罐100的工作原理为：罐体10和球囊20之间设置有气体，当外界有压力的水进入膨胀罐100中的球囊20内时，球囊20与罐体10之间的气体被压缩，气体受到压缩后体积变小压力升高，直到气体压力与水的压力达到一致时停止进水。当水流失压力减低时气体压力大于水的压力，此时气体膨胀将球囊20内的水挤出并流向外部管路。
请参见图1-图3，本申请提供的膨胀罐100包括罐体10、球囊20和法兰组件30，球囊20安装于罐体10内，球囊20的内部构造有囊腔21，球囊20与罐体10同轴设置且球囊20具有靠近轴线方向的内侧和远离轴线方向的外侧，球囊20具有囊口22，球囊20形成囊口22的侧壁朝着径向外侧弯折以形成第一翻边23，第一翻边23远离囊腔21的一端凸设有凸筋231，法兰组件30与第一翻边23连接，且凸筋231与法兰组件30过盈抵接。
如此，凸筋231与法兰组件30过盈抵接以后，凸筋231产生形变实现密封圈的效果，能够充满法兰组件30与第一翻边23之间的间隙，从而提高法兰组件30与第一翻边23之间的密闭性，以防止介质泄漏的问题出现。
在一实施例中，凸筋231采用软性材质，例如橡胶，从而在过盈配合使产生更大的形变填充间隙以此提高密封性。
进一步地，凸筋231沿着第一翻边23的周向布设并形成环状的凸起结构。环状的凸起结构能够使得凸筋231与法兰组件30形成周向的抵接效果，以保证凸筋231与法兰组件30之间的各个方向均存在密封结构及止挡结构，以优化密封效果。
可以理解地，在其他实施例中，凸筋231也可以不周向设置成完整的环状，而是在泄漏风险高的位置和角度单独设置，如此可以节省耗材，并且凸筋231具有更多的形变空间。
罐体10开设有通孔11，球囊20具有囊口22的一端伸出于通孔11，罐体10形成通孔11的边缘朝着径向外侧弯折以形成第二翻边12，第二翻边12与第一翻边23背向凸筋231的一侧抵接。如此，第二翻边12与第一翻边23增加了连接面积，提高罐体10端口与球囊20端口之间接触面积从而提高连接密封性。
进一步地，法兰组件30包括第一法兰31和第二法兰32，第一法兰31抵接于第一翻边23背向罐体10的侧面，并与凸筋231过盈配合，第二法兰32抵接于第二翻边12背向第一翻边23的一侧，且第一法兰31和第二法兰32通过多个连接件(图未示)连接。在本实施例中，连接件可采用螺栓，在其他实施例中也可以采用销钉、螺钉等结构。
定义罐体10开设有通孔11的一侧为下侧，罐体10远离通孔11的一侧为上侧。因此第一法兰31和第二法兰32分别抵接于第二翻边12的上侧和第一翻边23的下侧，两者从上下两个方向上提供压紧力，确保法兰组件30与球囊20以及罐体10的连接强度。并且由于第二法兰32压紧于第二翻边12上，也就是说第二法兰32压紧于罐体10上，相较于第二法兰通常压紧于第一翻边(也即球囊)的相关技术，罐体10的结构强度远大于球囊20，因此虽然第二法兰32与罐体10在压紧过程中容易因为两者呈夹角为90°的配合结构形成压强较大的线接触，罐体10依然能够保证耐用性和结构强度，避免了第二法兰32压紧于球囊20上而造成球囊20损坏。
在其他实施例中，第一法兰31上还可以开设凹槽(图未示)，凹槽与凸筋231对应设置，且凹槽沿着第一法兰31的径向方向上的槽宽小于凸筋231的厚度，也即凹槽与凸筋231依然过盈配合，以进一步提高密封效果。
第一法兰31朝向第二法兰32的一侧设有多个凸台310，凸台310朝着第二法兰32凸出，且至少一个凸台310与第一翻边23抵接。如此，除了凸筋231与第一法兰31的抵接以外，上述的凸台310与第一翻边23的抵接结构也能够增加密封效果。
进一步地，至少部分凸台310沿着径向间隔布设，以形成靠近于内侧的第一凸台311和靠近于外侧的第二凸台313。如此，第一凸台311和第二凸台313之间会自然形成凹陷区域，凹陷区域能够容纳第一翻边23，使法兰组件30与球囊20的配合更加紧密。此外，第一凸台311和第二凸台313还能够提高第一法兰31的抗扭强度。
在本实施例中，第一翻边23与第一凸台311形成面面接触的抵接效果。在其他实施例中，第一翻边23也可以同时与第一凸台311和第二凸台313抵接，以进一步提高密封效果。
更进一步地，第一凸台311沿着囊口22的内边沿的周向设置，以形成环形结构，并与囊口22的内边沿抵接；第二凸台313为多个，且沿着第一法兰31的轴向均匀间隔环绕布设，沿着第一法兰31的径向方向，第二凸台313与第一翻边23的外周侧间隔预设距离，预设距离小于第一翻边23朝向径向外侧的形变量。如此，环形的第一凸台311与第一翻边23能够形成周向抵接密封效果，增加了第一凸台311与第一翻边23的接触面积，能够进一步提高密封性能。由于球囊20的材质较软，球囊20的第一翻边23与第一法兰31的抵接过程中会出现弹性形变，该弹性形变包括沿径向方向的向内形变和向外形变，第一翻边23朝向径向内侧的形变与第一凸台311抵接，所以其形变方向会趋于朝向径向外侧，预设距离提供了形变的空间，并使第一翻边23在形变过后与第二凸台313抵接，以提高密封效果。
多个第二凸台313间隔设置之后，相邻的两个第二凸台313之间能够具有加工装配的空间，在本实施例中，在每两个相邻的第二凸台313之间开设连接孔314，连接件穿设于连接孔314中，两端分别与第一法兰31和第二法兰32连接，从而加固第一法兰31和第二法兰32之间的连接，提高法兰组件30整体的结构强度。
具体地，囊口22的边沿构造有斜面221，第一凸台311靠近第二凸台313的周向外侧设有抵接面3111，抵接面3111与斜面221对应倾斜设置，斜面221抵接于抵接面3111。如此，第一翻边23与第一凸台311的抵接更加紧密，且两者的相向运动趋势能够让抵接面3111和斜面221结合的更加紧密，密封性也就更好。其中“对应倾斜设置”也即抵接面3111相较于罐体10的轴线的斜度和斜面221相较于罐体10的轴线的斜度相同。
第一法兰31的轴向外侧朝向第二法兰32弯折并形成第三翻边312，第三翻边312与第二法兰32抵接。如此，第三翻边312与第二法兰32的抵接让第一法兰31和第二法兰32之间的间隔距离固定，方便装配，当通过连接件固定的时候第一法兰31和第二法兰32的受力均匀，且方便操作。
进一步地，第三翻边312上开设有排水口3121，且排水口3121贯穿第三翻边312。如此，考虑到在膨胀罐100实际安装中，第三翻边312朝上设置(也即膨胀罐100按照图1摆放)，因此第一法兰31上设置第三翻边312容易储存水，若长时间储水，容易造成法兰组件30生锈，影响其耐用性，因此增设排水口，可以大大降低生锈风险，延长膨胀罐100的使用周期。
相较于相关技术，本申请通过在球囊20的囊口22处的第一翻边23上增设凸筋231，让凸筋231与第一法兰31抵接以实现近似于密封圈的效果，能够提高球囊20与法兰组件30之间的连接密封性，进而避免出现介质泄漏的问题。并且第一法兰31和第二法兰32分别抵接于球囊20的第一翻边23和罐体10的第二翻边12，当第二法兰32朝向第一法兰31压紧时产生的应力会作用于结构强度较高的罐体10上，因此避免造成球囊20破损，延长了膨胀罐100的使用寿命。
进一步的，膨胀罐作为制冷系统中压力缓冲的核心组件，其密封性能直接决定系统的长期稳定性和安全性。传统膨胀罐在其筒体顶部安装阀针组件结构，而筒体与阀针组件结构之间的体密封多采用橡胶密封圈或O型圈压紧结构，通过弹性变形填充阀针组件结构与筒体上的进气口之间的间隙，实现密封。然而，通过密封圈来实现密封连接的方式仍然存在极小的间隙，膨胀罐内预充气依旧会以非常缓慢的速度泄漏，该情况导致膨胀罐内预充气每年需要补充；低温工况下，密封圈和O型圈还存在变形的可能，易导致密封失效；上述密封失效后，会导致膨胀罐内预充气泄漏，预充气泄漏会导致产品性能失效。
因此，在本申请一实施例中，本申请还提供一种膨胀罐100，膨胀罐100还包括通过焊接工艺与罐体10实现连接的充注阀40，相较于密封圈的密封方式，焊接连接可避免震动、温度变化、冷热冲击等情况导致的失效；且焊接通过材料间的相互渗透连接，连接效果更加牢固可靠。
示例性地，请参见图4-图5，一种膨胀罐100还包括充注阀40，罐体10具有腔室101，罐体10顶部设置有装配部111，装配部111开设有连通腔室101的进气口15；充注阀40包括阀座41和阀针组件43，阀座41与装配部111之间设置有焊接结构，并通过焊接结构将阀座41与装配部111进行密封连接；其中，阀针组件43在阀座41内活动以打开或者封堵进气口15，以改变腔室101与罐体10外部的连通状态或者隔断状态。
如此，气体通过充注阀40充入到腔室101中，以完成预充气过程。焊接结构通过焊接工艺加工形成，焊料融化以后形成焊接结构，焊接使得充注阀40与罐体10的顶部之间的密封性更好。此外，如上所述，焊接通过各个结构之间的缝隙渗透连接，使得充注阀40与罐体10的连接强度更高，承受膨胀罐100工作过程中的震动、温度变化的能力也更强。
在本实施例中，焊接结构通过高频焊接的工艺形成，在其他实施例中，高频焊接的工艺也可以替换为激光焊。焊接密封方式可避免内部气体泄漏，与传统膨胀罐100采用软密封结构有较大差异，本实施例提供的膨胀罐100在低温时氦检泄漏率小于4*10(-9)Pa*m3/S。高频焊接通过高频感应电流在焊接界面产生集肤效应，仅在充注阀40与进气口15接触区域快速加热，避免整体热输入对膨胀罐100内部隔膜或球囊的热损伤。
进一步地，罐体10的顶部向内凹陷形成装配部111，进气口15开设于装配部111的底部，且焊接结构形成于装配部111背向腔室101的一侧，阀座41抵接于焊接结构。如此，装配部111能够方便焊料充分渗透至二者之间的间隙，还能扩大二者之间的实际焊接面积，提高密封固定效果。
当然，在其他实施例中，也可以不设置装配部111，进气口15由圆弧形状的罐体10直接形成。
更进一步地，进气口15的孔壁边缘朝向远离腔室101的方向弯折并形成环形凸起112，沿着罐体10的轴线，环形凸起112远离腔室101的端面高于罐体10的顶部。如此，环形凸起112能够止挡焊料的流动，防止焊料从进气口15中流向腔室101内部，影响膨胀罐100的使用。需要解释的是，罐体10的顶部是指沿着罐体10的轴向方向，罐体10最靠近充注阀40的一端，也即罐体10的上侧。
示例性地，装配部111的横截面的至少部分为弧形、梯形或阶梯型。如此，能够促进焊料流动，并方便充注阀40的安装和抵靠。
沿着罐体10的轴线，装配部111的深度为0.5mm-2mm，沿着罐体10的径向方向，装配部111的宽度为1mm-3mm。如此，既能够防止装配部111的深度过浅而无法起到引导焊料流动的技术效果，又能够避免装配部111过深后造成罐体10加工困难，影响罐体10结构强度的问题。同理地，将装配部111的宽度设置在合理区间内，保证其技术效果的同时减少装配部111对于罐体10的加工以及结构强度的影响。
示例性地，装配部111的深度可以设置为1.0mm、1.5mm、1.7mm等，装配部111的宽度可以设置为1mm、1.5mm、2.4mm等，而不限于上述的端点值。
在本实施例中，罐体10、进气口15和装配部111均同轴设置。如此，膨胀罐100的整体性更好。
进一步的，罐体10包括第一罐体13和第二罐体14，第一罐体13和第二罐体14相对设置，且密封焊接形成罐体10，球囊20位于第一罐体13和第二罐体14共同构成的腔室101中，并与外部介质连通。通过第一罐体13与第二罐体14的分体式复合结构，分别加工以降低工艺难度。当系统内的液体受热膨胀或压力升高时，多余液体被压入膨胀罐100内，压缩罐内预充气体(如氮气)或挤压球囊20，气体或球囊20收缩以吸收体积变化，从而缓冲压力上升；当系统压力下降时，被压缩的气体或球囊20膨胀，将储存的液体推回系统，维持压力稳定。这一过程通过球囊20动态平衡系统压力，防止管道或设备因压力波动受损。
在一实施例中，充注阀40还包括阀盖42，阀盖42与阀座41螺纹连接，并盖设且密封阀座41远离罐体10的一端。如此，阀盖42能够保护充注阀40免受外部环境影响，延长其使用寿命。
可以理解地，在其他实施例中，阀盖42也可以通过与罐体10连接来实现固定，保护内部的阀座41及阀针组件43，或者与阀座41过盈配合、卡接等方式来实现连接，而并不限于上述的螺纹配合。
一些膨胀罐中，具有阀盖的充注阀不使用时，阀盖一般扣设在阀座背离罐体一侧，以对阀座进行封堵。但相关技术中的充注阀通常为单一密封且阀盖仅能起到对气体的止挡作用而无法起到辅助密封作用，若充注阀本身的密封失效，漏出的气体仍会从阀盖与阀座之间的间隙漏出，最终导致膨胀罐损坏或失效。
因此，请进一步参见图6至图9所示，本申请还提供有一些实施例的膨胀罐100的罐体10的顶部设有进气口15，膨胀罐100还包括充注阀40，充注阀40安装于进气口15处并连通于进气口15，用于向罐体10内注入气体。
充注阀40包括阀座41、阀盖42和阀针组件43，阀座41密封连接于罐体10，阀针组件43活动安装于阀座41内以打开或者封堵进气口15。
具体的，阀针组件43设置在阀座41内且具有可开闭的阀口4301，阀针组件43的外周与阀座41的腔体内壁密封配合；阀盖42可拆卸地扣设在阀座41的一端，在阀盖42安装在阀座41上的情况下，阀盖42的腔体内壁与阀座41的外周密封配合。
在本实施例中，在膨胀罐100的充注阀40不使用时，阀盖42安装在阀座41上，充注阀40通过阀座41与阀针组件43、阀盖42的双重密封防止气体泄漏，在需要使用充注阀40时，操作人员将阀盖42卸下，此时充注阀40通过阀座41与阀针组件43的密封防止充气过程中的气体泄露。这样设置，通过双重密封使得充注阀40在不使用时能够有效防止气体泄漏，避免在充注阀40采用单一密封(阀座41与阀针组件43之间的密封配合)时，若密封失效则会导致充注阀40漏气的情况，提高了充注阀40的自密封效果，能够应对多种复杂环境的同时不漏气，提高充注阀40的可靠性以及对不同应用环境的适用性。
其中，阀盖42与阀座41可分离地抵接，二者在抵接的情况下形成围绕阀针组件43的腔体的环形密封区域401。本实施例中的阀盖42与阀座41之间采用硬密封，相较于软密封其密封效果更可靠，有利于增强了充注阀40的密封性，确保了在高压等环境下的气体不会从阀盖42与阀座41的连接处泄漏，提高了充注阀40的使用寿命和系统的整体稳定性。
在本实施例中，阀盖42的腔体内壁具有内螺纹，阀座41的至少部分外周具有外螺纹，阀盖42和阀座41螺纹连接；阀盖42的腔体底壁与阀座41的端部抵接形成环形密封区域401；或，阀盖42的腔体内壁与阀座41的外周抵接形成环形密封区域401。这样设置，便于阀盖42的拆装以及阀盖42与阀座41的紧抵，保证环形密封区域401成型的可靠性以及阀盖42与阀座41之间的密封效果。
示例性地，阀座41的外周具有第一环形止挡台阶4121’或相对阀座41的轴线倾斜设置的第一环形止挡面4121，阀盖42的腔体开口的一侧与第一环形止挡台阶4121’或第一环形止挡面4121抵接形成环形密封区域401。
这样设置，实现阀盖42与阀座41在轴向上的抵接密封，有利于对密封位置的限定并保证抵接密封的可靠性。
具体地，阀盖42的腔体开口的一侧具有第二环形止挡台阶4201或相对阀座41的轴线倾斜设置的第二环形止挡面4201’；第二环形止挡台阶4201与第一环形止挡台阶4121’或第一环形止挡面4121抵接形成环形密封区域401；或，第二环形止挡面4201’与第一环形止挡台阶4121’或第一环形止挡面4121抵接形成环形密封区域401。
这样设置，进一步保证阀盖42与阀座41在轴向上的抵接密封以及抵接密封的可靠性，同时有利于阀盖42和阀座41的对应安装(即第一环形止挡台阶4121’或第一环形止挡面4121与第二环形止挡台阶4201或第二环形止挡面4201’的对应)抵接，在保证安装效果的同时保证抵接密封效果。
具体地，如图8和图9所示，阀座41包括顺次连接的第一配合段411、过渡段412和第二配合段413，第二配合段413的外径大于第一配合段411的外径，至少部分过渡段412的外径在第二配合段413朝向第一配合段411的方向上逐渐减小并形成第一环形止挡面4121，阀盖42可拆卸地扣设在第一配合段411背离第二配合段413的一端，阀盖42的腔体开口的一侧与过渡段412上的第一环形止挡面4121抵接形成环形密封区域401。这样设置，不仅保证并提高了密封效果，还有利于第一环形止挡面4121的成型以及简化充注阀40的装配过程，有利于降低加工成本和维护成本。
进一步地，如图3和图4所示，阀盖42包括顺次同轴连接的转接筒段421、环形抵接段422和限位段423，环形抵接段422设置在转接筒段421的开口处，限位段423设置在转接筒段421的开口处，环形抵接段422的内径小于限位段423的内径且大于转接筒段421的内径，环形抵接段422形成第二环形止挡台阶4201且具有沿其周向延伸的抵接尖角4221，抵接尖角4221与第一环形止挡面4121抵接形成环形密封区域401，环形密封区域401为环形密封线。
在本实施例中，转接筒段421的腔体内径与第一配合段411的外径适配，转接筒段421的腔体内壁具有内螺纹，第一配合段411的外周具有外螺纹，过渡段412分为变径段和恒径段，恒径段与第二配合段413连接，变径段与第一配合段411连接，变径段的径向尺寸在第一配合段411朝向第二配合段413的方向上逐渐增大并形成第一环形止挡面4121，恒径段的外径与限位段423的内径适配，在安装阀盖42时，将环形抵接段422扣设在阀座41的顶部并逐渐拧入，直至抵接尖角4221与第一环形止挡面4121抵接无法继续拧入并拧紧，限位段423与过渡段412的恒径段限位配合，完成对阀盖42的安装。这样设置，通过抵接尖角4221与第一环形止挡面4121的紧密接触，形成了高强度的环形密封线，有效防止了气体泄漏。在一实施例中，第二环形止挡台阶4201与第一环形止挡面4121处的结构可以采用金属材质等，有利于进一步提高密封位置的耐高温、高压性能。
可以理解的是，阀盖42与阀座41之间的密封可不通过上述的硬抵接密封实现，可选地，在其他未示出图纸的实施例中，充注阀40还包括第一环形密封件，阀盖42的腔体内壁通过第一环形密封件与阀座41的外周密封配合。
如图3和图4所示，充注阀40还包括设置在阀针组件43外周的第二环形密封件44，阀针组件43通过第二环形密封件44与阀座41的腔体内壁密封配合。其中，第二环形密封件44为具有一定柔性的结构，即阀针组件43与阀座41之间通过第二环形密封件44软密封，保证阀针组件43与阀座41密封的可靠性。
具体地，阀针组件43包括阀壳431以及设置可移动地设置在阀壳431内的阀针本体432，阀壳431设置在阀座41内并与阀座41的内壁密封配合，阀口4301位于在阀壳431的端部位置，阀针本体432的端部具有封堵件433，以封堵或打开阀口4301。
在本实施例中，阀针组件43的阀壳431顶部具有注气口4302，在需要使用充注阀40时，可以先拆下阀盖42，之后下压阀针本体432和封堵件433使其打开阀口4301，从阀座41的顶部开口向内注入气体，气体经过注气口4302进入阀壳431内并从阀口4301流出，进而从进气口15进入罐体10的腔室101中。这种设计使得阀针组件43能够精确控制气体的充注和释放，适用于需要精确气体控制的场合。
其中，阀壳431的至少部分外周具有外螺纹，阀座41腔体内壁对应具有内螺纹，阀壳431和阀座41螺纹连接。这样设置，便于阀针组件43在阀座41内的安装，同时有利于保证对第二环形密封件44的压装，保证密封性。
在一实施例提供了一种膨胀罐中，膨胀罐还包括防护壳50，罐体10的具有进气口15顶部为外凸式弧面，进气口处设置有第一限位结构19，充注阀40的阀座41背离阀盖42的一端设置有第二限位结构4131，充注阀40的阀座41安装在进气口处且第一限位结构19和第二限位结构4131限位配合，防护壳50扣设在充注阀40上并与罐体10的顶部外壁抵接。
在本实施例中，通过第一限位结构19和第二限位结构4131的配合便于充注阀40在罐体10上的定位安装，通过防护壳50可实现对充注阀40在不使用时的保护，避免其受外界环境影响而损坏的情况。进一步地，本实施例中的外凸式弧面的罐体10顶部，有利于防止膨胀罐100因压力过大而变形的情况，从而保证膨胀罐100的使用寿命和质量。
进一步的，对于具有充注阀(气门芯组件)的设备而言，防尘帽对充注阀进行防尘时，需要先将阀盖拧在阀座的外螺纹上，然后再将防尘帽套装在阀盖上；在进行充注作业时，需要先拆卸阀盖，如果采用旋转的方式，防尘帽会相对阀盖转动，不便于将阀盖和防尘帽同时拆卸，而需要先将防尘帽从阀盖上拔下来，然后再将阀盖从阀座上拧下来，拆装过程比较复杂。
因此，请进一步参见图10至图16所示，本申请还提供有一些膨胀罐100，在一些实施例中，膨胀罐100还设置有防护壳50，膨胀罐100的充注阀40包括阀座41及阀针组件43；其中，防护壳50包括罩体51和阀帽52，罩体51与阀帽52固定连接，以限制罩体51与阀帽52相对转动，阀帽52设置有内螺纹521，用于与充注阀40的外螺纹连接。也即，将相互独立的阀盖与防尘帽设置为固定连接的防护壳，以有效简化安装结构，便于组装及拆卸。
换言之，本实施例提供的防护壳50，通过在阀帽52上设置内螺纹521，能够将阀帽52安装在充注阀40的阀座41的外螺纹上，由于罩体51与阀帽52固定连接，因此罩体51与阀帽52不会相对转动，在安装时，可以将罩体51和阀帽52一起安装在阀座41上，在需要拆卸时，也可以通过旋转的方式将罩体51和阀帽52一起从阀座41上拧下来，简化了安装过程，提高了装配效率。
具体的，罐体10的顶部设有进气口15，充注阀40安装于进气口15处并连通于进气口15，充注阀40的阀座41密封连接于罐体10，阀针组件43活动安装于阀座41内以打开或者封堵进气口15，以改变罐体10的腔室与罐体10外部的连通状态或者隔断状态。
在本实施例中，外螺纹设置于阀座41的外周壁，换言之，阀帽52的内螺纹与充注阀40的阀座41的外螺纹连接。
示例性的，本实施例中的防护壳50，用于安装在膨胀罐100的阀座41上，能够防尘防水。在其他实施例中，防护壳50也可以安装在其他设备的阀针组件43上。
应当理解的是，罩体51与阀帽52固定连接，可以包括可拆卸式固定连接，也可以包括不可拆卸式固定连接。例如，在一实施例中，防护壳50包括罩体51和阀帽52；罩体51与阀帽52为一体式结构，换言之，罩体51与阀帽52制造时可一体成型。阀帽52设置有内螺纹521，用于与阀针组件43的外螺纹连接。
在一实施例中，参见图10至图12所示，罩体51呈圆台状，罩体51具有顶面511和底面512，顶面511的直径小于底面512的直径，顶面511为平面，底面512设置有容纳腔5121，阀帽52的至少部分位于容纳腔5121内。当用户将防护壳50从阀座41上取下来之后，可以将罩体51的顶面511朝下，放置在工作台或地面上，保证防护壳50不会任意滚动，同时，由于直径较大的底面512朝上，便于用户拿取。
示例性的，参见图12所示，阀帽52全部位于容纳腔5121内。在其他实施例中，阀帽52也可以有一部分伸出至罩体51的外部，即阀帽52的一端位于容纳腔5121的外部。
需要说明的是，阀帽52是否伸出至罩体51的外部，可以根据带有充注阀40的设备(例如膨胀罐100)中的阀座41的具体结构及安装形式来选择。
示例性地，参见图10所示，罩体51与阀帽52之间设置有加强筋513，加强筋513呈三角形板状结构，加强筋513的第一侧边5131与罩体51的内表面贴合，加强筋513的第二侧边5132与阀帽52的外表面贴合，加强筋513的第三侧边5133支撑于罩体51与阀帽52之间。
通过设置加强筋513，且加强筋513呈三角形板状结构，一方面，能够提高防护壳50的抗压性能，减小外力对膨胀罐100的冲击，另一方面，能够增加阀帽52与罩体51的连接强度，以提高防护壳50的整体结构强度。
示例性的，阀帽52可以为空心圆柱状结构。阀帽52与罩体51同轴设置。加强筋513呈板状结构。加强筋513的数量为多个。多个加强筋513沿阀帽52的周向间隔设置。
本实施例中，加强筋513的数量可以为六个，六个加强筋513沿阀帽52的周向均匀间隔设置。
在一实施例中，罩体51的周向表面设置有多个自外表面向内凹陷形成的凹陷部514，多个凹陷部514沿周向间隔设置。这样的方式不仅符合人机工程学，而且能够减少材料用量，降低成本。例如，参见图11和图13所示，本实施例中的凹陷部514的数量为六个，六个凹陷部514沿罩体51的周向均匀间隔设置。示例性的，凹陷部514的内表面可以为球冠曲面。
在一实施例中，参见图13至图15所示，防护壳50包括罩体51和阀帽52；罩体51设置有连接部515，连接部515设置有容纳槽5152；阀帽52安装于容纳槽5152，阀帽52的外表面设置有防转部522，容纳槽5152的槽壁设置有防转配合部5151，防转配合部5151与防转部522相配合，以限制罩体51相对于阀帽52转动；阀帽52设置有内螺纹521，用于与阀针组件43的外螺纹连接。
本实施例中，连接部515与罩体51一体成型设置。
在一实施例中，参见图13和图14所示，罩体51呈圆台状，罩体51具有顶面511和底面512，顶面511的直径小于底面512的直径，顶面511为平面，底面512设置有容纳腔5121，连接部515的至少部分位于容纳腔5121内。当用户将防护壳50从阀针组件43上取下来之后，可以将罩体51的顶面511朝下，放置在工作台或地面上，保证防护壳50不会任意滚动，同时，由于直径较大的底面512朝上，便于用户拿取。
在一实施例中，连接部515位于罩体51的内部，阀帽52远离容纳槽5152的槽底的端面与连接部515设置有容纳槽5152的端面齐平。可以理解，在其他实施例中，阀帽52远离容纳槽5152的槽底的端面也可以位于容纳槽5152的外部。
需要说明的是，阀帽52是否伸出至容纳槽5152的外部，可以根据带有充注阀40的设备(例如膨胀罐100)中的阀座41的具体结构及安装形式来选择。
在一些实施例中，防转部522与防转配合部5151为相互配合的非正圆弧面。
示例性的，阀帽52的至少部分周向外表面形成防转部522，阀帽52的横截面的形状可以为椭圆形，容纳槽5152的槽壁的轮廓与椭圆形相适配，在将阀帽52安装于连接部515之后，阀帽52不会相对于连接部515转动，即阀帽52不会相对于罩体51转动。
可以理解，在其他实施例中，阀帽52的横截面的形状不仅局限于椭圆形，还可以为多边形或其他异形形状，只要阀帽52的至少部分表面不是圆弧面即可。
本实施例中，参见图15所示，防转部522为六棱柱面，容纳槽5152的槽壁的横截面的形状为六边形，容纳槽5152的至少部分槽壁形成防转配合部5151，防转部与防转配合部贴合设置。
示例性的，防转部522为阀帽52的周向外表面，阀帽52可以为六棱柱结构，六棱柱结构设置有内螺纹521。当然，防转部522也可以为阀帽52的周向外表面的一部分，示例性的，阀帽52可以包括同轴设置的六棱柱结构和圆柱结构，其中，六棱柱结构位于容纳槽5152内，圆柱结构可以位于容纳槽5152外部，甚至也可以位于罩体的外部，圆柱结构和至少部分六棱柱结构均设置有内螺纹。
在一些实施例中，参见图13所示，阀帽52的一部分位于容纳腔5121内，另一部分位于罩体51的外部。在其他实施例中，阀帽52也可以完全位于容纳腔5121内。
需要说明的是，阀帽52是否伸出至罩体的外部，可以根据带有充注阀40的设备(例如膨胀罐100)中的阀座41的具体结构及安装形式来选择。
需要说明的是，容纳槽5152的槽壁也可以只有一部分与防转部522配合，该部分槽壁形成防转配合部5151。
在另一些实施例中，防转部522和防转配合部5151中的一者为凸起，另一者为凹槽。
示例性的，参见图16所示，防转部522可以为设置于阀帽52的周向表面的凸起，防转配合部5151可以为设置在容纳槽5152的槽壁的凹槽，在装配后，凸起限位于凹槽，从而防止罩体51相对于防护罩转动。防护罩与连接部515可以过盈配合。
在一个实施例中，参见图14所示，罩体51与连接部515之间设置有加强筋513，加强筋513呈三角形板状结构，加强筋513的第一侧边5131与罩体51的内表面贴合，加强筋513的第二侧边5132与连接部515的外表面贴合，加强筋513的第三侧边5133支撑于罩体51与连接部515之间。
通过设置加强筋513，且加强筋513呈三角形板状结构，能够提高防护壳50的结构强度，进而提高防护壳50的抗压性能，减小外力对膨胀罐100的冲击。
示例性的，连接部515的外表面为圆柱面，连接部515与罩体51同轴设置，加强筋513的数量为多个，多个加强筋513沿连接部515的周向间隔设置。
本实施例中，加强筋513的数量可以为六个，六个加强筋513沿连接部515的周向均匀间隔设置。
本实施例提供的膨胀罐100，在安装防护壳50时，可以将罩体51和阀帽52一起安装在充注阀40的阀座41上，在需要拆卸防护壳50时，也可以通过旋转的方式将罩体51和阀帽52一起从阀座41上拧下来，简化了安装过程，提高了装配效率。
在一些实施例中，充注阀40的一端伸入膨胀罐100的罐体内部，另一端凸出于膨胀罐100的罐体顶部，此时，可以将阀帽52直接安装于充注阀40上，此时，阀帽52的端部可以不凸出于罩体51。
在另一些实施例中，罐体10顶部设置有槽部，充注阀40设置于槽内，阀帽52凸出于罩体51外部的部分伸入槽内，以与充注阀40的阀座41配合。
进一步的，为了降低降低膨胀罐100加工工艺难度的同时加强对球囊20的保护，本申请还提供有一些实施例。请进一步参见图17-图19所示，在一实施例中，膨胀罐100包括第一罐体13和第二罐体14，第一罐体13和第二罐体14的敞口端通过连接结构16连接成筒状罐体，连接结构16包括第一罐体对接部131和第二罐体对接部141，第一罐体对接部131和第二罐体对接部141均为向远离膨胀罐100轴线方向延伸形成的外延环，且第一罐体对接部131的端面与第一罐体13下端口的内侧面通过光滑圆角过渡连接，第二罐体对接部141的端面与第二罐体14上端口的内侧面通过光滑圆角过渡连接，第一罐体对接部131和第二罐体对接部141的相对面固定连接。本实施例的连接结构16的内侧面上无凸出的尖锐角，第一罐体对接部131与第一罐体13连接处，以及第二罐体对接部141与第二罐体14连接处，不仅均为圆角过渡设计，且该连接处位于膨胀罐100的罐体内侧面的区域，这一区域靠近罐体的外部一侧，减小了球囊20与连接结构16内侧的接触面积和摩擦力，更好的避免了球囊20因长时间摩擦破裂。
在一些实施例中，第一罐体对接部131为第一罐体13下端侧壁向远离膨胀罐100方向折弯而成，第二罐体对接部141为第二罐体14上端侧壁向远离膨胀罐100轴线方向折弯而成，第一罐体对接部131和第二罐体对接部141的径向宽度相同，第一罐体对接部131和第二罐体对接部141宽度不小于2倍的壁厚。可以为3～4倍壁厚。如此设置，保证了连接结构16与膨胀罐100本身的结构稳定性。第一罐体13下端侧壁向远离膨胀罐100方向折弯的角度与第二罐体14上端侧壁向远离膨胀罐100方向折弯的角度相同，本领域技术人员可根据实际情况选择折弯的角度，在本实例中，为方便焊接，折弯的角度可以选为90°。
在一些实施例中，在第一罐体对接部131和第二罐体对接部141的相对面上设有多组定位凸点102和定位凹点103，每组中的定位凸点102和定位凹点103上下相对设置，定位凸点102和定位凹点103相适配，且嵌设连接。通过多组定位凸点102和定位凹点103的嵌设连接能够在焊接前精确固定并限制第一罐体13和第二罐体14的相对位置，并在焊接过程保证第一罐体13和第二罐体14位置不变，方便焊接，提高工作效率。定位凸点102和定位凹点103的组数不少于2组，多组定位凸点102和定位凹点103在膨胀罐100外周侧均匀布置，进一步提高了第一罐体13和第二罐体14的定位精度。定位凸点102可为任意形状，只要其与定位凹点103配合可以定位第一罐体13和第二罐体14即可，本领域技术人员可根据实际需要选择设置。在另一些实施例中，定位凸点102可以为为半球形，半球形定位凸点102结构简单，如此设置，可以提高生产效率。
半球形定位凸点102的尺寸根据半球形定位凸点102所在对接部的径向宽度以及定位凹点103所在对接部罐体的壁厚进行确定，原则上半球形定位凸点102直径须小于半球形定位凸点102所在对接部的径向宽度。
本申请还提供有一实施例，参见图20和图21所示，膨胀罐100的罐体10包括第一罐体13和第二罐体14，第一罐体13和第二罐体14的敞口端通过连接结构16连接成筒状罐体，连接结构16包括第一罐体弯折部132和第二罐体弯折部142，第二罐体弯折部142的弯折点为光滑的圆角过渡，第二罐体弯折部142位于第一罐体弯折部132的内侧，第二罐体弯折部142的外侧面与第一罐体弯折部132的内侧面固定连接。在一些实施例中，第二罐体弯折部142配置为第二罐体14上部侧壁向罐体10外部弯折一定的角度，角度的大小在本申请中可不作限定，只要和第一罐体弯折部132中与其连接部分的弯折角度和弯折方向相同即可。
在一些实施例中，第一罐体弯折部132包括向膨胀罐100外侧倾斜向下弯折的倾斜部104和位于倾斜部104下端的竖向部105，倾斜部104的上部与第一罐体13下端面一体成型连接；，第二罐体弯折部142配置为第二罐体14向膨胀罐100外侧弯折180°而成的U型部106，且U型部106的两个侧杆的相对侧壁紧贴设置，U型部106的一侧杆与第二罐体14上端面为一体式连接结构16，也即一体成型连接，即第二罐体弯折部142的上部侧壁向罐体外侧弯折90°，U型部外侧杆自由端端部与竖向部自由端端部焊接固定连接。如此设置，将连接结构16上与球囊20接触的凸起部外移至膨胀罐100内侧壁靠近罐体外部的一侧，同时凸起部为光滑的圆角，减小了球囊20与连接结构16内侧的接触面积和摩擦力，更好的避免了球囊20因长时间摩擦破裂。
在一些实施例中，倾斜部104相对第一罐体或第二罐体内侧壁的倾斜角度根据第一罐体和第二罐体的侧壁厚度确定，保证U型部106外侧杆的外侧壁与竖向部的内侧壁之间紧贴。
在一些其他实施例中，如图22所示，第一罐体弯折部132和第二罐体弯折部142的结构位置可互换设置，也即，第二罐体弯折部142包括向膨胀罐100外侧倾斜向上弯折的倾斜部104和位于倾斜部104上端的竖向部105，倾斜部104的下端与第二罐体14上端面为一体式连接结构16，也即一体成型连接；第一罐体弯折部132为第一罐体13下部向膨胀罐100外侧弯折180°而成的U型部106，且U型部106两侧杆的相对侧壁紧贴设置，U型部106的一侧杆与第一罐体13下端面一体成型连接，U型部106的外侧杆自由端端部与竖向部105自由端端部焊接固定连接。
参见图23，本申请还提供一种制冷系统200，包括如上所述的膨胀罐100。可以理解，制冷系统具有上述实施例中膨胀罐100所具有的优点，使用寿命、安全性均更优异。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (34)

  1. 一种膨胀罐，其特征在于，包括：
    罐体；
    球囊，安装于所述罐体内，所述球囊的内部构造有囊腔，所述球囊与所述罐体同轴设置且所述球囊具有靠近轴线方向的内侧和远离轴线方向的外侧，所述球囊具有囊口，所述球囊形成所述囊口的侧壁朝着径向外侧弯折以形成第一翻边，所述第一翻边远离所述囊腔的侧面凸设有凸筋；以及
    法兰组件，与所述第一翻边连接，且所述凸筋与所述法兰组件过盈抵接。
  2. 根据权利要求1所述的膨胀罐，其中，所述凸筋沿着所述第一翻边的周向布设并形成环状的凸起结构。
  3. 根据权利要求1所述的膨胀罐，其中，所述罐体开设有通孔，所述球囊具有所述囊口的一端伸出于所述通孔；
    所述罐体形成所述通孔的边缘朝着径向外侧弯折以形成第二翻边，所述第二翻边与所述第一翻边背向所述凸筋的一侧抵接。
  4. 根据权利要求3所述的膨胀罐，其中，所述法兰组件包括第一法兰和第二法兰，所述第一法兰抵接于所述第一翻边背向所述罐体的侧面，并与所述凸筋过盈配合，所述第二法兰抵接于所述第二翻边背向所述第一翻边的一侧，且所述第一法兰和所述第二法兰通过多个连接件连接。
  5. 根据权利要求4所述的膨胀罐，其中，所述第一法兰朝向所述第二法兰的一侧设有多个凸台，所述凸台朝着所述第二法兰凸出，且至少一个凸台与所述第一翻边抵接；至少部分所述凸台沿着径向间隔布设，以形成靠近于内侧的第一凸台和靠近于外侧的第二凸台。
  6. 根据权利要求5所述的膨胀罐，其中，所述第一凸台沿着所述囊口的内边沿周向设置，以形成环形结构，并与所述囊口的内边沿抵接；
    所述第二凸台为多个，且沿着所述第一法兰的轴向均匀间隔环绕布设，沿着所述第一法兰的径向方向，所述第二凸台与所述第一翻边的外周侧间隔预设距离，所述预设距离小于所述第一翻边朝向径向外侧的形变量。
  7. 根据权利要求6所述的膨胀罐，其中，所述囊口的边沿构造有斜面，所述第一凸台靠近所述第二凸台的周向外侧设有抵接面，所述抵接面与所述斜面对应倾斜设置，所述斜面抵接于所述抵接面。
  8. 根据权利要求4所述的膨胀罐，其中，所述第一法兰的轴向外侧朝向所述第二法兰弯折并形成第三翻边，所述第三翻边与所述第二法兰抵接；或者，
    所述第一法兰的轴向外侧朝向所述第二法兰弯折并形成第三翻边，所述第三翻边与所述第二法兰抵接，且所述第三翻边上开设有排水口，所述排水口贯穿所述第三翻边。
  9. 根据权利要求1所述的膨胀罐，其中，所述罐体具有腔室，所述罐体顶部设置有装配部，所述装配部开设有连通所述腔室的进气口；
    所述膨胀罐还包括充注阀，所述充注阀包括阀座和阀针组件，所述阀座与所述装配部之间设置有焊接结构，并通过所述焊接结构将所述阀座与所述装配部进行密封连接；
    所述阀针组件活动安装于所述阀座内以打开或者封堵所述进气口，以改变所述腔室与所述罐体外部的连通状态或者隔断状态。
  10. 根据权利要求9所述的膨胀罐，其中，所述罐体的顶部向内凹陷形成所述装配部，所述进气口开设于所述装配部的底部。
  11. 根据权利要求10所述的膨胀罐，其中，所述进气口的孔壁边缘朝向远离所述腔室的方向弯折并形成环形凸起，沿着所述罐体的轴线，所述环形凸起远离所述腔室的端面高于所述罐体的顶部；及/或，
    所述装配部的横截面的至少部分为弧形、梯形或阶梯型；及/或，
    沿着所述罐体的轴线，所述装配部的深度为0.5mm-2mm，沿着所述罐体的径向方向，所述装配部的宽度为1mm-3mm；及/或，所述罐体、所述进气口和所述装配部均同轴设置。
  12. 根据权利要求1所述的膨胀罐，其中，所述罐体的顶部还设有进气口，所述膨胀罐还包括充注阀，所述充注阀安装于所述进气口处并连通于所述进气口；
    所述充注阀包括阀座、阀盖和阀针组件，所述阀座密封连接于所述罐体，所述阀针组件设置在所述阀座内且具有可开闭的阀口，所述阀针组件的外周与所述阀座的腔体内壁密封配合；所述阀盖可拆卸地扣设在所述阀座的一端，在所述阀盖安装在所述阀座上的情况下，所述阀盖的腔体内壁与所述阀座的外周密封配合。
  13. 根据权利要求12所述的膨胀罐，其中，所述阀盖与所述阀座可分离地抵接，二者在抵接的情况下形成围绕所述阀针组件的腔体的环形密封区域；
    所述阀盖的腔体底壁与所述阀座的端部抵接形成所述环形密封区域；或，所述阀盖的腔体内壁与所述阀座的外周抵接形成所述环形密封区域。
  14. 根据权利要求12所述的膨胀罐，其中，所述阀座的外周具有第一环形止挡台阶或相对所述阀座的轴线倾斜设置的第一环形止挡面，所述阀盖的腔体开口的一侧与所述第一环形止挡台阶或所述第一环形止挡面抵接形成环形密封区域。
  15. 根据权利要求14所述的膨胀罐，其中，所述阀盖的腔体开口的一侧具有第二环形止挡台阶或相对所述阀座的轴线倾斜设置的第二环形止挡面；
    所述第二环形止挡台阶与所述第一环形止挡台阶或所述第一环形止挡面抵接形成所述环形密封区域；或者，所述第二环形止挡面与所述第一环形止挡台阶或所述第一环形止挡面抵接形成所述环形密封区域。
  16. 根据权利要求14所述的膨胀罐，其中，所述阀座包括顺次连接的第一配合段、过渡段和第二配合段，所述第二配合段的外径大于所述第一配合段的外径，至少部分所述过渡段的外径在所述第二配合段朝向所述第一配合段的方向上逐渐减小并形成所述第一环形止挡面，所述阀盖可拆卸地扣设在所述第一配合段背离所述第二配合段的一端，所述阀盖的腔体开口的一侧与所述过渡段上的所述第一环形止挡面抵接形成所述环形密封区域。
  17. 根据权利要求14所述的膨胀罐，其中，所述阀盖包括顺次同轴连接的转接筒段、环形抵接段和限位段，所述环形抵接段设置在所述转接筒段的开口处，所述限位段设置在所述转接筒段的开口处，所述环形抵接段的内径小于所述限位段的内径且大于所述转接筒段的内径，所述环形抵接段形成第二环形止挡台阶且具有沿其周向延伸的抵接尖角，所述抵接尖角与所述第一环形止挡面抵接形成所述环形密封区域，所述环形密封区域为环形密封线。
  18. 根据权利要求12所述的膨胀罐，其中，所述充注阀还包括第一环形密封件，所述阀盖的腔体内壁通过所述第一环形密封件与所述阀座的外周密封配合；及/或，
    所述充注阀还包括设置在所述阀针组件外周的第二环形密封件，所述阀针组件通过所述第二环形密封件与所述阀座的腔体内壁密封配合。
  19. 根据权利要求12所述的膨胀罐，其中，所述阀针组件包括阀壳以及可移动地设置在所述阀壳内的阀针本体，所述阀壳设置在所述阀座内并与所述阀座的内壁密封配合，所述阀口位于在所述阀壳的端部位置，连通所述进气口，所述阀针本体的端部具有封堵件，以封堵或打开所述阀口。
  20. 根据权利要求1所述的膨胀罐，其中，所述罐体的顶部还设有进气口，所述膨胀罐还包括充注阀，所述充注阀安装于所述进气口处并连通于所述进气口；所述充注阀包括阀座及阀针组件，所述阀座密封连接于罐体，所述阀针组件活动安装于阀座内以打开或者封堵所述进气口；
    所述膨胀罐还包括防护壳，所述防护壳包括罩体和阀帽；
    所述罩体设置有连接部，所述连接部设置有容纳槽，所述阀帽的至少部分位于所述容纳槽，所述阀帽的外表面包括防转部，所述容纳槽的槽壁包括防转配合部，所述防转配合部与所述防转部抵接限位，以限制所述罩体相对于所述阀帽转动，或者，所述罩体与所述阀帽为一体式结构；
    所述阀帽设置有内螺纹，用于与所述阀座的外螺纹连接。
  21. 根据权利要求20所述的膨胀罐，其中，在所述罩体设置有连接部，所述连接部设置有容纳槽，至少部分所述阀帽位于所述容纳槽，所述阀帽的外表面包括防转部，所述容纳槽的槽壁包括防转配合部，所述防转配合部与所述防转部抵接限位，以限制所述罩体相对于所述阀帽转动时，
    所述防转部和所述防转配合部中的一者为凸起，另一者为凹槽，或者，所述防转部与所述防转配合部为相互配合的非圆弧面。
  22. 根据权利要求20所述的膨胀罐，其中，在所述罩体设置有连接部，所述连接部设置有容纳槽，至少部分所述阀帽位于所述容纳槽，所述阀帽的外表面包括防转部，所述容纳槽的槽壁包括防转配合部，所述防转配合部与所述防转部抵接限位，以限制所述罩体相对于所述阀帽转动时，
    所述防转部为六棱柱面，所述容纳槽的槽壁的横截面的形状为六边形，所述容纳槽的至少部分槽壁形成所述防转配合部，所述防转部与所述防转配合部贴合设置。
  23. 根据权利要求20所述的膨胀罐，其中，在所述罩体与所述阀帽为一体式结构时，所述罩体与所述阀帽之间设置有加强筋，所述加强筋呈三角形板状结构，所述加强筋的第一侧边与所述罩体的内表面贴合，所述加强筋的第二侧边与所述阀帽的外表面贴合，所述加强筋的第三侧边支撑于所述罩体与所述阀帽之间。
  24. 根据权利要求21或22所述的膨胀罐，其中，所述罩体与所述阀帽之间设置有加强筋，所述加强筋呈三角形板状结构，所述加强筋的第一侧边与所述罩体的内表面贴合，所述加强筋的第二侧边与所述阀帽的外表面或者与所述连接部的外表面贴合，所述加强筋的第三侧边支撑于所述罩体与所述连接部之间；及/或，
    所述连接部位于所述罩体的内部，所述阀帽远离所述容纳槽的槽底的端面与所述连接部设置有容纳槽的端面齐平。
  25. 根据权利要求20至23中任一项所述的膨胀罐，其中，所述罩体呈圆台状，所述罩体具有顶面和底面，所述顶面的直径小于所述底面的直径，所述顶面为平面，所述底面设置有容纳腔，所述阀帽的至少部分位于所述容纳腔内。
  26. 根据权利要求25所述的膨胀罐，其中，所述罩体的周向表面设置有多个自外表面向内凹陷形成的凹陷部，多个所述凹陷部沿周向间隔设置。
  27. 根据权利要求1所述的膨胀罐，其中，所述罐体包括第一罐体和第二罐体，所述第一罐体和第二罐体的敞口端通过连接结构连接成筒状的所述罐体，所述连接结构的内侧面与所述球囊接触的拐点均为光滑圆角过渡。
  28. 根据权利要求27所述的膨胀罐，其中，所述连接结构包括第一罐体对接部和第二罐体对接部，所述第一罐体对接部和所述第二罐体对接部均为向远离罐体轴线的方向延伸形成的外延环，且第一罐体对接部下端面与第一罐体下端口内侧面通过光滑圆角过渡连接，第二罐体对接部的上端面与第二罐体上端口内侧面通过光滑圆角过渡连接，第一罐体对接部和第二罐体对接部的相对面固定连接。
  29. 根据权利要求28所述的膨胀罐，其中，所述第一罐体对接部为第一罐体下端侧壁向远离膨胀罐方向折弯而成，所述第二罐体对接部为第二罐体上端侧壁向远离膨胀罐方向折弯而成，所述第一罐体对接部和所述第二罐体对接部的径向宽度相同，第一罐体对接部和第二罐体对接部宽度不小于2倍的壁厚。
  30. 根据权利要求29所述的膨胀罐，其中，在所述第一罐体对接部和第二罐体对接部的相对面上设有至少两组定位凸点和定位凹点，每组中的定位凸点和定位凹点上下相对设置，定位凸点和定位凹点相适配，两者嵌设连接。
  31. 根据权利要求30所述的膨胀罐，其中，至少两组所述定位凸点和定位凹点在膨胀罐外周侧均匀布置；及/或，所述定位凸点的形状为半球形，所述定位凸点的直径小于所述定位凸点所在的所述对接部的径向宽度。
  32. 根据权利要求27所述的膨胀罐，其中，所述膨胀罐还包括第一罐体弯折部和第二罐体弯折部，所述第二罐体弯折部的弯折点为光滑的圆角过渡，所述第二罐体弯折部位于所述第一罐体弯折部的内侧，所述第二罐体弯折部的外侧面与所述第一罐体弯折部的内侧面固定连接；或者，
    所述第一罐体弯折部的弯折点为光滑的圆角过渡，所述第一罐体弯折部位于所述第二罐体弯折部的内侧，所述第一罐体弯折部的外侧面与所述第二罐体弯折部的内侧面固定连接。
  33. 根据权利要求32所述的膨胀罐，其中，所述第一罐体弯折部包括向膨胀罐外侧倾斜向下弯折的倾斜部和位于倾斜部下端的竖向部，倾斜部的上部与第一罐体下端面一体成型连接；所述第二罐体弯折部配置为所述第二罐体向膨胀罐外侧弯折180°而成的U型部，且所述U型部的两个侧杆的相对侧壁紧贴设置，所述U型部的一个侧杆与所述第二罐体的上端面为一体式连接结构，所述U型部与所述竖向部固定连接；或者，
    所述第二罐体弯折部包括向膨胀罐外侧倾斜向上弯折的倾斜部和位于倾斜部上端的竖向部，所述倾斜部的下端与所述第二罐体上端面一体成型连接；所述第一罐体弯折部配置为所述第一罐体下部向膨胀罐外侧弯折180°而成的U型部，且所述U型部两个侧杆的相对侧壁紧贴设置，所述U型部的一个侧杆与所述第一罐体的下端面为一体式连接结构，所述U型部与所述竖向部固定连接。
  34. 一种制冷系统，其特征在于，包括如权利要求1-33任一项所述的膨胀罐。
PCT/CN2025/109339 2024-07-19 2025-07-18 膨胀罐及制冷系统 Pending WO2026017155A1 (zh)

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CN202422185442.X 2024-09-05
CN202422185442.XU CN223149318U (zh) 2024-09-05 2024-09-05 一种膨胀罐连接结构及膨胀罐
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CN202520102254.8U CN223648651U (zh) 2025-01-15 2025-01-15 充注阀及膨胀罐
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