Variable-volume multi-layer vacuum heat preservation device and method

Abstract

The invention relates to the technical field of heat storage equipment, and discloses a variable-volume multi-layer vacuum heat preservation device and method.The variable-volume multi-layer vacuum heat preservation device comprises a telescopic shell, a partition plate is fixedly installed on the side wall of the bottom end of the telescopic shell, and a telescopic inner container is fixedly installed between the top of the partition plate and the inner top wall of the telescopic shell; a piston cavity is formed between the partition plate and the inner bottom wall of the telescopic shell, a rubber piston piece is fixedly installed on the side wall of the lower half portion of the piston cavity, a reciprocating actuator is fixedly installed at the center of the rubber piston piece, a first one-way valve is arranged on the side face of the telescopic shell, and a second one-way valve is arranged on the partition plate. The inner wall of the telescopic shell and the outer wall of the telescopic inner container are in a normal pressure state by unscrewing the sealing plug, the upper half part of the flexible friction ring cannot be pressed on the outer wall of the upper barrel shell by unfastening the reinforcing belt, and then the upper barrel shell and the lower barrel shell are held to move towards each other or move away from each other, so that the internal volumes of the telescopic shell and the telescopic inner container are adjusted.

Description

Technical Field

[0001] This invention relates to the field of thermal energy storage equipment technology, specifically to a variable volume multilayer vacuum insulation device and method. Background Technology

[0002] A thermos flask is a common heat preservation device, mainly composed of an outer shell and an inner liner, with a cavity between them. The air inside the cavity acts as a poor conductor of heat, reducing heat conduction between the tea / water inside the liner and the outside air. Part of the thermos flask's internal cavity creates a vacuum chamber by expelling its internal air, further enhancing the heat preservation effect.

[0003] However, in order to ensure the sealing of the vacuum chamber inside the thermos, the shape and internal volume of a typical thermos cannot be changed. When carrying a large amount of water, multiple thermoses are needed. When carrying a small amount of water, the thermos is relatively large, making it inconvenient to carry. Further improvements can be made. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a variable-volume multilayer vacuum insulation device and method, which has the advantages of conveniently adjusting the shape and internal volume of the insulated cup, and solves the problem that the shape and volume of the insulated cup cannot be adjusted.

[0005] (II) Technical Solution To achieve the aforementioned goal of conveniently adjusting the shape and internal volume of the thermos, the present invention provides the following technical solution: a variable volume multi-layer vacuum insulation device, comprising a telescopic outer shell, a partition fixedly installed on the bottom side wall of the telescopic outer shell, and a telescopic inner liner fixedly installed between the top of the partition and the inner top wall of the telescopic outer shell; a piston chamber is formed between the partition and the inner bottom wall of the telescopic outer shell, a rubber piston plate is fixedly installed on the lower half side wall of the piston chamber, a reciprocating actuator is fixedly installed at the center of the rubber piston plate, a first one-way valve is provided on the side of the telescopic outer shell, the first one-way valve communicates with the piston chamber and is located on the upper side of the rubber piston plate, and a second one-way valve is provided on the partition, the second one-way valve communicates with the piston chamber.

[0006] Preferably, the telescopic outer shell includes a lower cylindrical shell, an upper cylindrical shell is slidably connected to the top of the lower cylindrical shell, a rubber tube is fixedly installed between the bottom of the upper cylindrical shell and the partition, the cross-section of the rubber tube is wavy, a threaded ring is fixedly installed at the center of the top of the upper cylindrical shell, the cross-section of the threaded ring is L-shaped, the sealing cap is threadedly connected to the threaded ring, and a cavity is provided inside the sealing cap.

[0007] Preferably, a lower handle is fixedly installed on the outer wall of the bottom end of the lower cylinder shell, and an upper handle is fixedly installed on the outer wall of the top end of the upper cylinder shell. The first one-way valve is located inside the lower handle. An exhaust hole is opened at the bottom end of the lower handle. Both the lower handle and the upper handle are L-shaped. The bottom end of the upper handle is inserted into the top end of the lower handle. The bottom end of the upper handle is sealed, and the top end communicates with the upper cylinder shell.

[0008] Preferably, an air inlet pipe is provided at the top of the upper handle, and a sealing plug is threaded into the air inlet pipe. A flexible friction ring is fixedly installed on the outer wall of the top of the lower cylinder shell. The upper half of the flexible friction ring is sleeved on the outer side of the upper cylinder shell. A reinforcing band is fixedly installed on the outer wall of the upper half of the flexible friction ring. Limit buttons are fixedly arranged in an array along the length direction at the end of the reinforcing band that is fixed to the flexible friction ring. Limit holes are arranged in an array along the length direction at the free end of the reinforcing band, and the limit buttons are inserted into the limit holes.

[0009] Preferably, the telescopic inner liner includes a lower inner liner fixedly installed at the center of the top of the partition, an upper inner liner sleeved on the outer side of the top of the lower inner liner, the top of the upper inner liner fixedly installed at the bottom of the threaded ring, a sealing ring provided between the inner wall of the bottom of the upper inner liner and the outer wall of the lower inner liner, a second rubber tube fixedly installed between the bottom of the upper inner liner and the partition, the second rubber tube having a wavy cross-section, a supporting step provided on the inner wall of the middle part of the upper inner liner, a lower support bucket placed on the top of the lower inner liner, and an upper support bucket placed on the supporting step.

[0010] Preferably, the reciprocating actuator includes an annular guide rail fixedly installed at the bottom of the telescopic housing. The annular guide rail has an L-shaped cross-section. A cover-shaped knob is rotatably connected to the outer side of the annular guide rail. A hexagonal sleeve is fixedly inserted through the center of the rubber piston plate. The hexagonal sleeve is slidably connected through the center of the bottom of the telescopic housing. A drive shaft is rotatably connected inside the hexagonal sleeve. A ball bearing is fixedly installed on the inner wall of the lower half of the hexagonal sleeve. An inclined annular groove is formed on the circumferential surface of the drive shaft. The ball bearing is slidably connected in the inclined annular groove. The inclined annular groove includes two spiral grooves. The two spiral grooves are symmetrically arranged on the circumferential surface of the drive shaft. The bottom ends of the two spiral grooves are connected by a lower arc groove, and the top ends of the two spiral grooves are connected by an upper arc groove.

[0011] Preferably, the bottom of the cover-shaped knob has a through hole one, and a rubber ring gasket is fixedly installed at the bottom of the cover-shaped knob. The through hole one is located inside the rubber ring gasket. The bottom of the telescopic outer shell has a through hole two. The inner wall of the cover-shaped knob has an array of protruding strips fixedly fixedly, and the cross-section of the protruding strips is V-shaped. The inner wall of the annular guide rail has an array of mounting cylinders fixedly installed. A limit pin is slidably connected at the center of the mounting cylinder. A spring one is fixedly installed between one end of the limit pin and the inner wall of the mounting cylinder. The free end of the limit pin is hemispherical and fits against the side of the protruding strip.

[0012] Preferably, the first one-way valve includes a tubular shell fixedly installed on the side of the telescopic outer shell, a perforated plate fixedly installed on the inner wall of the middle part of the tubular shell, a retaining ring fixedly installed on the inner wall of the end of the tubular shell facing the telescopic outer shell, a valve stem fixedly installed at the center of the perforated plate, a conical plug fixedly installed at the end of the valve stem near the retaining ring, the conical plug being inserted into the retaining ring, and a spring two fixedly installed between the conical plug and the perforated plate.

[0013] Preferably, the second one-way valve includes an annular cover fixedly installed on the top of the partition. The annular cover has two semi-circular one-way channels arranged in a front-to-back manner, and the two one-way channels are arranged in a mirror image. A through groove is opened through the top left side of the annular cover, and the through groove is connected to the left end of the two one-way channels. A through groove is opened through the right half of the surface of the partition, and the through groove is connected to the right end of the two one-way channels. Each one-way channel has an array of arc-shaped protrusions on its left and right sidewalls. A flow divider is provided on the inner side of each arc-shaped protrusion. The flow divider extends to the middle of the one-way channel, and a U-shaped gap is formed between the flow divider and the arc-shaped protrusion.

[0014] A method for a variable volume multilayer vacuum insulation device, the specific steps of which are as follows: S1. First, loosen the sealing plug to allow outside air to pass through the air inlet pipe and the upper handle into the upper cylinder shell, so that the inner wall of the telescopic outer shell and the outer wall of the telescopic inner liner are at normal pressure. Untie the reinforcing band so that the upper part of the flexible friction ring is not pressed against the outer wall of the upper cylinder shell. Then hold the upper and lower cylinder shells and move them towards each other or away from each other to adjust the internal volume of the telescopic outer shell and the telescopic inner liner. S2. After that, tighten the sealing plug so that the air intake pipe is no longer connected to the outside. Then, insert the limit button into the limit hole so that the reinforcement belt is tied to the outer side of the upper half of the flexible friction ring. Through the pressure of the flexible friction ring on the outer wall of the upper cylinder shell, the upper cylinder shell is inhibited from continuing to slide relative to the lower cylinder shell, so that the volume inside the telescopic outer shell and the telescopic inner liner is maintained in the current state. S3. Hold the lower and upper handles with one hand and the cover-shaped knob with the other hand and turn it. As the ball slides inside the spiral groove, lower arc groove and upper arc groove, when the drive shaft rotates, it drives the hexagonal sleeve to move up and down relative to the telescopic outer shell. S4. When the hexagonal sleeve moves upward, the rubber piston plate bends and deforms upward, making the piston chamber positively pressurized. The air inside the piston chamber has difficulty passing through the second one-way valve and flowing upward. The air inside the piston chamber passes through the first one-way valve and the exhaust port and is discharged to the outside. S5. When the hexagonal sleeve moves downward, the rubber piston plate bends and deforms downward, creating a negative pressure inside the piston chamber. The air inside the lower and upper cylinder shells enters the piston chamber through the second one-way valve. By continuously rotating the cover-shaped knob, the air between the lower and upper cylinder shells is continuously transferred to the piston chamber. Then, the air inside the piston chamber is discharged through the first one-way valve, creating a negative pressure state inside the lower and upper cylinder shells.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a variable volume multilayer vacuum insulation device and method, which has the following beneficial effects: 1. This variable volume multi-layer vacuum insulation device allows external air to enter the upper cylinder shell through the air inlet pipe and the upper handle by loosening the sealing plug, so that the inner wall of the telescopic outer shell and the outer wall of the telescopic inner liner are at normal pressure. By loosening the reinforcing belt, the upper part of the flexible friction ring will not be pressed against the outer wall of the upper cylinder shell. Then, by holding the upper and lower cylinder shells, the two can be moved towards each other or away from each other to adjust the internal volume of the telescopic outer shell and the telescopic inner liner. 2. In this variable-volume multi-layer vacuum insulation device, when the hexagonal sleeve moves upward, the rubber piston plate bends and deforms upward, creating positive pressure inside the piston chamber. Air inside the piston chamber is unable to flow upward through the second one-way valve and is instead discharged to the outside through the first one-way valve and the exhaust port. When the hexagonal sleeve moves downward, the rubber piston plate bends and deforms downward, creating negative pressure inside the piston chamber. Air inside the lower and upper cylinder shells enters the piston chamber through the second one-way valve. By continuously rotating the cover-shaped knob, air between the lower and upper cylinder shells is continuously transferred to the piston chamber, and then discharged through the first one-way valve, creating negative pressure inside the lower and upper cylinder shells. This facilitates the discharge of air from the insulation chamber, creating a negative pressure environment and enhancing the insulation effect. 3. After adjusting the internal pressure of the insulation cavity to negative pressure, this variable volume multi-layer vacuum insulation device can be placed on a smooth surface. The rubber ring pad is attached to the smooth surface and held on the lower and upper handles. At the same time, the telescopic outer shell rotates relative to the cover-shaped knob, thereby moving the rubber piston plate upward. Through the connection of the second through hole, the inside of the cover-shaped knob is made into a negative pressure state. Through the connection of the first through hole, the inside of the rubber ring pad is also made into a negative pressure state, which can adsorb the device onto the smooth surface. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a variable volume multilayer vacuum insulation device proposed in this invention; Figure 2 This is a schematic diagram of the main cross-sectional structure of a variable volume multilayer vacuum insulation device proposed in this invention; Figure 3This is a schematic diagram of the telescopic outer shell structure of a variable volume multilayer vacuum insulation device proposed in this invention; Figure 4 This is a schematic diagram of the three-dimensional exploded structure of the telescopic outer shell of a variable volume multilayer vacuum insulation device proposed in this invention; Figure 5 This is a schematic diagram of the telescopic inner liner structure of a variable volume multilayer vacuum insulation device proposed in this invention. Figure 6 This is a three-dimensional structural diagram of the reciprocating actuator of a variable volume multilayer vacuum insulation device proposed in this invention; Figure 7 This is a three-dimensional structural diagram of the hexagonal sleeve and drive shaft of a variable volume multilayer vacuum insulation device proposed in this invention; Figure 8 This is a three-dimensional structural diagram of the first one-way valve of a variable volume multilayer vacuum insulation device proposed in this invention. Figure 9 This is a top view cross-sectional diagram of the second one-way valve of a variable volume multilayer vacuum insulation device proposed in this invention. Figure 10 This invention proposes a variable volume multilayer vacuum insulation device. Figure 9 A detailed, enlarged structural diagram of point A in the middle.

[0017] In the diagram: 100, telescopic outer shell; 200, partition; 300, telescopic inner liner; 400, sealing cap; 500, rubber piston plate; 600, reciprocating actuator; 700, first check valve; 800, second check valve; 101. Lower cylinder shell; 102. Upper cylinder shell; 103. Rubber tube one; 104. Threaded ring; 105. Lower handle; 106. Upper handle; 107. Exhaust port; 108. Air inlet pipe; 109. Sealing plug; 110. Flexible friction ring; 111. Reinforcing strip; 112. Limit button; 113. Limit hole; 301. Lower inner liner; 302. Upper inner liner; 303. Sealing ring; 304. Rubber hose II; 305. Support step; 306. Lower support bucket; 307. Upper support bucket; 601. Annular guide rail; 602. Cover-shaped knob; 603. Hexagonal sleeve; 604. Drive shaft; 605. Sliding ball; 606. Inclined annular groove; 607. Clamping plate; 608. Through hole one; 609. Rubber ring gasket; 610. Through hole two; 611. Raised strip; 612. Mounting cylinder; 613. Limiting pin; 614. Spring one; 6061. Spiral groove; 6062. Lower arc groove; 6063. Upper arc groove; 701. Tubular shell; 702. Perforated plate; 703. Enclosure ring; 704. Valve stem; 705. Conical plug; 706. Spring II; 801. Annular cover; 802. Through slot one; 803. Through slot two; 804. Arc-shaped boss; 805. Diverter plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-2 A variable volume multilayer vacuum insulation device and method includes a telescopic outer shell 100, a partition 200 fixedly installed on the bottom side wall of the telescopic outer shell 100, a telescopic inner liner 300 fixedly installed between the top of the partition 200 and the inner top wall of the telescopic outer shell 100, a tubular insulation cavity formed between the inner wall of the telescopic outer shell 100 and the outer wall of the telescopic inner liner 300, a piston cavity formed between the partition 200 and the inner bottom wall of the telescopic outer shell 100, a rubber piston plate 500 fixedly installed on the lower half side wall of the piston cavity, a reciprocating actuator 600 fixedly installed at the center of the rubber piston plate 500, a first one-way valve 700 provided on the side of the telescopic outer shell 100, the first one-way valve 700 communicating with the piston cavity and located above the rubber piston plate 500, and a second one-way valve 800 provided on the partition 200, the second one-way valve 800 communicating with the piston cavity. Thus, the reciprocating actuator 600 drives the middle part of the rubber piston plate 500 to move up and down repeatedly. The deformation of the rubber piston plate 500 causes a change in the volume inside the piston chamber, allowing the air inside the insulation chamber to enter the piston chamber through the second one-way valve 800, and the air inside the piston chamber to be discharged through the first one-way valve 700.

[0020] Please see Figures 3-4 The telescopic outer shell 100 includes a lower cylindrical shell 101, with an upper cylindrical shell 102 slidably connected to the top of the lower cylindrical shell 101. A rubber tube 103 is fixedly installed between the bottom of the upper cylindrical shell 102 and the partition plate 200. The rubber tube 103 has a wavy cross-section, so that it folds or unfolds when the upper cylindrical shell 102 slides relative to the lower cylindrical shell 101. During this process, the rubber tube 103 blocks the gap between the lower cylindrical shell 101 and the upper cylindrical shell 102, preventing external air from entering the telescopic outer shell 100 through the gap between the lower cylindrical shell 101 and the upper cylindrical shell 102. A threaded ring 104 is fixedly installed at the center of the top of the upper cylindrical shell 102. The threaded ring 104 has an L-shaped cross-section, and a sealing cap 400 is threadedly connected to the threaded ring 104. The sealing cap 400 has a cavity inside, thereby enhancing the heat insulation effect of the sealing cap 400.

[0021] A lower handle 105 is fixedly installed on the outer wall of the bottom end of the lower cylindrical shell 101, and an upper handle 106 is fixedly installed on the outer wall of the top end of the upper cylindrical shell 102. A first one-way valve 700 is located inside the lower handle 105, and an exhaust hole 107 is provided at the bottom end of the lower handle 105, thereby protecting the first one-way valve 700 from impact damage. The lateral arrangement of the first one-way valve 700 also prevents it from malfunctioning when the telescopic outer shell 100 is moved up and down. Both the lower handle 105 and the upper handle 106 are L-shaped. The bottom end of the upper handle 106 is inserted into the top end of the lower handle 105, the bottom end of the upper handle 106 is sealed, and the top end communicates with the upper cylindrical shell 102.

[0022] An air inlet pipe 108 is provided at the top of the upper handle 106, and a sealing plug 109 is internally threaded into the air inlet pipe 108. Due to the negative pressure inside the insulation cavity, the upper shell 102 tends to move towards the lower shell 101, making it easier to reduce the size of the telescopic outer shell 100. However, pulling the upper shell 102 upward to increase the size of the telescopic outer shell 100 is more difficult due to the negative pressure in the insulation cavity. Therefore, by screwing on the sealing plug 109, external air can be connected to the interior of the upper shell 102 through the air inlet pipe 108, bringing the interior of the insulation cavity to a normal pressure state. At this time, it is easier to push the upper shell 102 relative to the lower shell 101 to slide. After adjustment, the sealing plug 109 can be tightened to keep the insulation cavity sealed. Then, the rubber piston plate 500 moves back and forth inside the piston chamber to expel the air from the insulation cavity again.

[0023] A flexible friction ring 110 is fixedly installed on the outer wall of the top of the lower cylindrical shell 101. The flexible friction ring 110 can be made of rubber. The upper half of the flexible friction ring 110 is sleeved on the outside of the upper cylindrical shell 102. A reinforcing band 111 is fixedly installed on the outer wall of the upper half of the flexible friction ring 110. Limit buttons 112 are fixedly arranged along the length direction of the end of the reinforcing band 111 that is fixed to the flexible friction ring 110. Limit holes 113 are arranged along the length direction on the free end of the reinforcing band 111, and the limit buttons 112 are inserted into the limit holes 113. By pulling the free end of the reinforcing band 111 to tighten the reinforcing band 111, and then inserting the limit buttons 112 into the limit holes 113, the flexible friction ring 110 is pressed against the surface of the upper cylindrical shell 102. The friction between the flexible friction ring 110 and the upper cylindrical shell 102 inhibits the sliding of the upper cylindrical shell 102 relative to the lower cylindrical shell 101, keeping the telescopic outer shell 100 in its current state. The flexible friction ring 110 and the reinforcing strip 111 can also serve a decorative purpose.

[0024] Please see Figure 5The telescopic inner liner 300 includes a lower inner liner 301 fixedly installed at the top center of the partition 200. An upper inner liner 302 is sleeved on the outer side of the top of the lower inner liner 301. The top of the upper inner liner 302 is fixedly installed at the bottom of the threaded ring 104, so that when the upper shell 102 slides relative to the lower shell 101, the upper inner liner 302 slides relative to the lower inner liner 301. Therefore, when adjusting the shape of the telescopic outer shell 100, the internal volume of the telescopic inner liner 300 is adjusted simultaneously. A sealing ring 303 is provided between the inner wall of the bottom end of the upper inner liner 302 and the outer wall of the lower inner liner 301, and the sealing ring 303 is used to seal the gap between the lower inner liner 301 and the upper inner liner 302. A second rubber tube 304 is fixedly installed between the bottom end of the upper inner liner 302 and the partition 200. The second rubber tube 304 has a wavy cross-section and is used to cover the gap between the lower inner liner 301 and the upper inner liner 302. A support step 305 is provided on the inner wall of the middle part of the upper inner liner 302, a lower hopper 306 is placed on the top of the lower inner liner 301, and an upper hopper 307 is placed on the support step 305. Specifically, the bottom of the lower hopper 306 and the upper hopper 307 can be set as a mesh to facilitate soaking different items in the tea.

[0025] Please see Figures 6-7 The reciprocating actuator 600 includes an annular guide rail 601 fixedly installed at the bottom of the telescopic housing 100. The annular guide rail 601 has an L-shaped cross-section. A cover-shaped knob 602 is rotatably connected to the outer side of the annular guide rail 601. A hexagonal sleeve 603 is fixedly inserted through the center of the rubber piston plate 500. The hexagonal sleeve 603 is a hollow hexagonal prism and is slidably connected to the center of the bottom of the telescopic housing 100. A drive shaft 604 is rotatably connected inside the hexagonal sleeve 603. A ball bearing 605 is fixedly installed on the inner wall of the lower half of the hexagonal sleeve 603. An inclined annular groove 606 is formed on the circumferential surface of the drive shaft 604, and the ball bearing 605 is slidably connected in the inclined annular groove 606. Because the inclined annular groove 606 is inclined, the hexagonal sleeve 603 and the ball bearing 605 can reciprocate up and down during the rotation of the drive shaft 604.

[0026] The inclined annular groove 606 includes two spiral grooves 6061, which are symmetrically arranged on the circumferential surface of the drive shaft 604. The bottom ends of the two spiral grooves 6061 are connected by a lower arc groove 6062, and the top ends of the two spiral grooves 6061 are connected by an upper arc groove 6063. Thus, when the ball bearing 605 slides to the lower arc groove 6062 or the upper arc groove 6063, the hexagonal sleeve 603 can be maintained at the current height; when the ball bearing 605 slides inside one of the spiral grooves 6061, the hexagonal sleeve 603 gradually rises, and when the ball bearing 605 slides inside the other spiral groove 6061, the hexagonal sleeve 603 gradually lowers.

[0027] In practice, two clamping discs 607 are fixedly installed at the top of the hexagonal sleeve 603. The two clamping discs 607 clamp the upper and lower sides of the rubber piston plate 500 respectively, and the edges of the two clamping discs 607 are bent towards opposite sides. Therefore, during the up-and-down movement of the hexagonal sleeve 603, the contact area between the clamping discs 607 and the rubber piston plate 500 is large, which can increase the deformation range of the rubber piston plate 500; and when the rubber piston plate 500 bends and deforms in the middle, the edges of the clamping discs 607 are prevented from damaging the rubber piston plate 500. When the rubber piston plate 500 moves upward, the piston chamber is under positive pressure, and the air inside the piston chamber can be discharged to the outside through the first one-way valve 700; when the rubber piston plate 500 moves downward, the piston chamber is under negative pressure, and the air inside the insulation chamber can enter the piston chamber through the second one-way valve 800.

[0028] A through hole 608 is provided at the bottom of the cover-shaped knob 602. A rubber ring gasket 609 is fixedly installed at the bottom of the cover-shaped knob 602. The through hole 608 is located inside the rubber ring gasket 609. A through hole 610 is provided at the bottom of the telescopic outer shell 100. After adjusting to negative pressure inside the insulation cavity, the device can be placed on a smooth surface, such as a glass tabletop. The rubber ring gasket 609 adheres to the smooth surface, and the device is held on the lower handle 105 and the upper handle 106. At the same time, the telescopic outer shell 100 rotates relative to the cover-shaped knob 602, thereby moving the rubber piston plate 500 upward. Through the connection of the through hole 610, a negative pressure is created inside the cover-shaped knob 602. Through the connection of the through hole 608, a negative pressure is also created inside the rubber ring gasket 609, which can attract the device to the smooth surface. This makes the device more stable when placed.

[0029] The inner wall of the cover-shaped knob 602 is fixed with an array of protruding strips 611, each with a V-shaped cross-section. An array of mounting cylinders 612 are fixedly mounted on the inner wall of the annular guide rail 601. A limiting pin 613 is slidably connected at the center of the mounting cylinder 612. A spring 614 is fixedly mounted between one end of the limiting pin 613 and the inner wall of the mounting cylinder 612. The free end of the limiting pin 613 is hemispherical and fits against the side of the protruding strips 611. The elasticity of the spring 614 causes the limiting pin 613 to press tightly against the opposite side of two adjacent protruding strips 611, increasing the resistance to rotation of the cover-shaped knob 602 relative to the telescopic outer shell 100 and preventing accidental rotation of the cover-shaped knob 602.

[0030] Please see Figure 8The first one-way valve 700 includes a tubular shell 701 fixedly installed on the side of the telescopic outer shell 100. A perforated plate 702 is fixedly installed on the inner wall of the middle part of the tubular shell 701. A retaining ring 703 is fixedly installed on the inner wall of the end of the tubular shell 701 facing the telescopic outer shell 100. A valve stem 704 is fixedly installed at the center of the perforated plate 702. A conical plug 705 is fixedly installed at the end of the valve stem 704 near the retaining ring 703. The conical plug 705 is inserted into the retaining ring 703. A second spring 706 is fixedly installed between the conical plug 705 and the perforated plate 702. The elasticity of the second spring 706 causes the conical plug 705 to tend to insert into the retaining ring 703 and seal the retaining ring 703. When the air pressure inside the piston chamber is greater than the elasticity of the second spring 706, the conical plug 705 moves away from the retaining ring 703, and the air inside the piston chamber can be discharged through the gap between the conical plug 705 and the retaining ring 703. When the piston chamber is under negative pressure, the conical plug 705 can stably seal the retaining ring 703 under the elasticity of the spring 706.

[0031] Please see Figures 9-10 The second one-way valve 800 is designed to allow air inside the insulation cavity to pass through it unidirectionally into the piston cavity. Furthermore, the second one-way valve 800 has no movable structures inside, so the unidirectional airflow within it is not affected when the telescopic housing 100 moves up and down. The second one-way valve 800 includes an annular cover 801 fixedly installed on the top of the partition 200. The annular cover 801 has two semi-circular one-way channels arranged in a front-to-back manner, and the two one-way channels are mirror images of each other. A through groove 802 is opened through the top left side of the annular cover 801, and the through groove 802 is connected to the left end of the two one-way channels. A through groove 803 is opened through the right half of the surface of the partition 200, and the through groove 803 is connected to the right end of the two one-way channels. Each one-way channel has an array of arc-shaped protrusions 804 on its left and right sidewalls. A flow divider 805 is provided inside the arc-shaped protrusions 804. The flow divider 805 extends to the middle of the one-way channel, and a U-shaped gap is formed between the flow divider 805 and the arc-shaped protrusion 804.

[0032] When air inside the insulation cavity passes through slot 1 (802) into the one-way flow channel, it can flow smoothly along the one-way flow channel to slot 2 (803) and then enter the piston cavity through slot 2 (803). However, when air inside the piston cavity enters the second one-way valve (800) in the opposite direction, it passes through slot 2 (803) into the right end of the one-way flow channel. Due to the diversion effect of the flow divider (805), some air continues to flow along the one-way flow channel, while the other part flows along the U-shaped gap. However, when the air inside the U-shaped gap flows back into the one-way flow channel, the air flow direction inside the U-shaped gap is opposite to the air flow direction inside the one-way flow channel. Therefore, the air flowing back from the U-shaped gap will obstruct the air inside the one-way flow channel. By arranging multiple U-shaped flow channels in an array inside the one-way flow channel, the obstruction effect on the air inside the one-way flow channel can be enhanced, thus preventing air from the piston cavity from entering the insulation cavity.

[0033] A method for a variable volume multilayer vacuum insulation device, the specific steps of which are as follows: S1. First, loosen the sealing plug 109 to allow external air to pass through the air inlet pipe 108 and the upper handle 106 into the interior of the upper cylinder shell 102, so that the inner wall of the telescopic outer shell 100 and the outer wall of the telescopic inner liner 300 are at normal pressure. Untie the reinforcing band 111 so that the upper part of the flexible friction ring 110 is not pressed against the outer wall of the upper cylinder shell 102. Then hold the upper cylinder shell 102 and the lower cylinder shell 101 and move them towards each other or away from each other to adjust the internal volume of the telescopic outer shell 100 and the telescopic inner liner 300. S2. Then, tighten the sealing plug 109 to prevent the air intake pipe 108 from communicating with the outside. Then, insert the limit button 112 into the limit hole 113 so that the reinforcing band 111 is tied to the outer side of the upper half of the flexible friction ring 110. The pressure of the flexible friction ring 110 on the outer wall of the upper shell 102 will suppress the upper shell 102 from continuing to slide relative to the lower shell 101, so that the volume inside the telescopic outer shell 100 and the telescopic inner liner 300 remains in the current state. S3. Hold the lower handle 105 and the upper handle 106 with one hand, and hold the cover-shaped knob 602 with the other hand and turn it. As the ball bearing 605 slides inside the spiral groove 6061, the lower arc groove 6062 and the upper arc groove 6063, when the drive shaft 604 rotates, it drives the hexagonal sleeve 603 to move up and down relative to the telescopic outer shell 100. S4. When the hexagonal sleeve 603 moves upward, the rubber piston plate 500 bends and deforms upward, making the piston chamber under positive pressure. The air inside the piston chamber is difficult to flow upward through the second one-way valve 800. The air inside the piston chamber is discharged to the outside through the first one-way valve 700 and the exhaust port 107. S5. When the hexagonal sleeve 603 moves downward, the rubber piston plate 500 bends and deforms downward, making the piston chamber negatively pressurized. The air inside the lower cylinder shell 101 and the upper cylinder shell 102 enters the piston chamber through the second one-way valve 800. By continuously rotating the cover-shaped knob 602, the air between the lower cylinder shell 101 and the upper cylinder shell 102 is continuously transferred to the piston chamber. Then, the air inside the piston chamber is discharged through the first one-way valve 700, making the lower cylinder shell 101 and the upper cylinder shell 102 negatively pressurized.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable volume multilayer vacuum insulation device, comprising a telescopic outer shell (100), characterized in that: A partition (200) is fixedly installed on the bottom side wall of the telescopic outer shell (100), and a telescopic inner liner (300) is fixedly installed between the top of the partition (200) and the inner top wall of the telescopic outer shell (100). A piston chamber is formed between the partition (200) and the inner bottom wall of the telescopic housing (100). A rubber piston plate (500) is fixedly installed on the lower half side wall of the piston chamber. A reciprocating actuator (600) is fixedly installed at the center of the rubber piston plate (500). A first one-way valve (700) is provided on the side of the telescopic housing (100). The first one-way valve (700) communicates with the piston chamber and is located on the upper side of the rubber piston plate (500). A second one-way valve (800) is provided on the partition (200). The second one-way valve (800) communicates with the piston chamber.

2. The variable volume multilayer vacuum insulation device according to claim 1, characterized in that: The telescopic outer shell (100) includes a lower cylindrical shell (101), an upper cylindrical shell (102) is slidably connected to the top of the lower cylindrical shell (101), a rubber tube (103) is fixedly installed between the bottom of the upper cylindrical shell (102) and the partition (200), the cross-section of the rubber tube (103) is wavy, a threaded ring (104) is fixedly installed at the center of the top of the upper cylindrical shell (102), the cross-section of the threaded ring (104) is L-shaped, the sealing cover (400) is threadedly connected to the threaded ring (104), and a cavity is provided inside the sealing cover (400).

3. The variable volume multilayer vacuum insulation device according to claim 2, characterized in that: A lower handle (105) is fixedly installed on the outer wall of the bottom end of the lower cylinder shell (101), and an upper handle (106) is fixedly installed on the outer wall of the top end of the upper cylinder shell (102). The first one-way valve (700) is located inside the lower handle (105). An exhaust hole (107) is opened at the bottom end of the lower handle (105). Both the lower handle (105) and the upper handle (106) are L-shaped. The bottom end of the upper handle (106) is inserted into the top end of the lower handle (105). The bottom end of the upper handle (106) is sealed, and the top end is connected to the upper cylinder shell (102).

4. The variable volume multilayer vacuum insulation device according to claim 3, characterized in that: An air inlet pipe (108) is provided at the top of the upper handle (106), and a sealing plug (109) is threaded into the air inlet pipe (108). A flexible friction ring (110) is fixedly installed on the outer wall of the top of the lower cylinder shell (101). The upper half of the flexible friction ring (110) is sleeved on the outside of the upper cylinder shell (102). A reinforcing band (111) is fixedly installed on the outer wall of the upper half of the flexible friction ring (110). A limit button (112) is fixedly arranged along its length direction on one end of the reinforcing band (111) and the flexible friction ring (110). A limit hole (113) is arranged along its length direction on the free end of the reinforcing band (111). The limit button (112) is inserted into the limit hole (113).

5. The variable volume multilayer vacuum insulation device according to claim 4, characterized in that: The telescopic inner liner (300) includes a lower inner liner (301) fixedly installed at the top center of the partition (200). An upper inner liner (302) is sleeved on the outer side of the top of the lower inner liner (301). The top of the upper inner liner (302) is fixedly installed at the bottom of the threaded ring (104). A sealing ring (303) is provided between the inner wall of the bottom end of the upper inner liner (302) and the outer wall of the lower inner liner (301). A rubber tube (304) is fixedly installed between the bottom end of the upper inner liner (302) and the partition (200). The cross-section of the rubber tube (304) is wavy. A support step (305) is provided on the inner wall of the middle part of the upper inner liner (302). A lower support bucket (306) is placed on the top of the lower inner liner (301). An upper support bucket (307) is placed on the support step (305).

6. The variable volume multilayer vacuum insulation device according to claim 5, characterized in that: The reciprocating actuator (600) includes an annular guide rail (601) fixedly installed at the bottom of the telescopic housing (100). The annular guide rail (601) has an L-shaped cross-section. A cover-shaped knob (602) is rotatably connected to the outside of the annular guide rail (601). A hexagonal sleeve (603) is fixedly inserted through the center of the rubber piston plate (500). The hexagonal sleeve (603) is slidably connected through the center of the bottom of the telescopic housing (100). A drive shaft (604) is rotatably connected inside the hexagonal sleeve (603). A ball bearing (605) is fixedly installed on the inner wall of the lower half of the hexagonal sleeve (603). An inclined annular groove (606) is opened on the circumferential surface of the drive shaft (604). The ball bearing (605) is slidably connected in the inclined annular groove (606). The inclined annular groove (606) includes two spiral grooves (6061), which are symmetrically arranged on the circumferential surface of the drive shaft (604). The bottom ends of the two spiral grooves (6061) are connected by a lower arc groove (6062), and the top ends of the two spiral grooves (6061) are connected by an upper arc groove (6063).

7. The variable volume multilayer vacuum insulation device according to claim 6, characterized in that: The bottom of the cover-shaped knob (602) has a through hole (608), and a rubber ring gasket (609) is fixedly installed at the bottom of the cover-shaped knob (602). The through hole (608) is located inside the rubber ring gasket (609), and the bottom of the telescopic outer shell (100) has a through hole (610). The inner wall of the cover-shaped knob (602) is fixed with an array of protruding strips (611), the cross-section of the protruding strips (611) is V-shaped, and the inner wall of the annular guide rail (601) is fixed with an array of mounting cylinders (612). A limiting pin (613) is slidably connected at the center of the mounting cylinder (612). A spring (614) is fixedly installed between one end of the limiting pin (613) and the inner wall of the mounting cylinder (612). The free end of the limiting pin (613) is hemispherical and fits against the side of the protruding strips (611).

8. The variable volume multilayer vacuum insulation device according to claim 7, characterized in that: The first one-way valve (700) includes a tubular shell (701) fixedly installed on the side of the telescopic outer shell (100). A perforated plate (702) is fixedly installed on the inner wall of the middle part of the tubular shell (701). A retaining ring (703) is fixedly installed on the inner wall of the end of the tubular shell (701) facing the telescopic outer shell (100). A valve stem (704) is fixedly installed at the center of the perforated plate (702). A conical plug (705) is fixedly installed at the end of the valve stem (704) near the retaining ring (703). The conical plug (705) is inserted into the retaining ring (703). A spring (706) is fixedly installed between the conical plug (705) and the perforated plate (702).

9. The variable volume multilayer vacuum insulation device according to claim 8, characterized in that: The second one-way valve (800) includes an annular cover (801) fixedly installed on the top of the partition (200). The annular cover (801) has two semi-circular one-way channels distributed in front and behind, and the two one-way channels are arranged in a mirror image. A through groove (802) is provided through the top left side of the annular cover (801), and the through groove (802) is connected to the left end of the two one-way channels. A through groove (803) is provided through the surface of the right half of the partition (200), and the through groove (803) is connected to the right end of the two one-way channels. Each of the unidirectional flow channels has an array of arc-shaped bosses (804) arranged on its left and right sidewalls. Each arc-shaped boss (804) has a flow divider (805) arranged on its inner side. The flow divider (805) extends to the middle of the unidirectional flow channel, and a U-shaped gap is formed between the flow divider (805) and the arc-shaped boss (804).

10. The variable volume multilayer vacuum insulation device according to claim 9, characterized in that, The specific steps of the method for this variable volume multilayer vacuum insulation device are as follows: S1. First, loosen the sealing plug (109) so that external air can pass through the air inlet pipe (108) and the upper handle (106) into the interior of the upper shell (102), so that the inner wall of the telescopic outer shell (100) and the outer wall of the telescopic inner liner (300) are at normal pressure. Untie the reinforcing band (111) so that the upper part of the flexible friction ring (110) will not be pressed against the outer wall of the upper shell (102). Then hold the upper shell (102) and the lower shell (101) and move them towards each other or away from each other to adjust the internal volume of the telescopic outer shell (100) and the telescopic inner liner (300). S2. Then, tighten the sealing plug (109) to prevent the air inlet pipe (108) from communicating with the outside. Then, insert the limit button (112) into the limit hole (113) so that the reinforcing band (111) is tied to the outer side of the upper half of the flexible friction ring (110). Through the pressure of the flexible friction ring (110) on the outer wall of the upper shell (102), the upper shell (102) is suppressed from continuing to slide relative to the lower shell (101), so that the volume inside the telescopic outer shell (100) and the telescopic inner liner (300) remains in the current state. S3. Hold the lower handle (105) and upper handle (106) with one hand, and hold the cover-shaped knob (602) with the other hand and turn it. As the ball bearing (605) slides inside the spiral groove (6061), lower arc groove (6062) and upper arc groove (6063), when the drive shaft (604) rotates, it drives the hexagonal sleeve (603) to move up and down relative to the telescopic outer shell (100). S4. When the hexagonal sleeve (603) moves upward, the rubber piston plate (500) bends and deforms upward, making the piston chamber positively pressurized. The air inside the piston chamber is difficult to flow upward through the second one-way valve (800). The air inside the piston chamber is discharged to the outside through the first one-way valve (700) and the exhaust port (107). S5. When the hexagonal sleeve (603) moves downward, the rubber piston plate (500) bends and deforms downward, making the piston chamber negative. The air inside the lower cylinder shell (101) and the upper cylinder shell (102) enters the piston chamber through the second one-way valve (800). By continuously rotating the cover-shaped knob (602), the air between the lower cylinder shell (101) and the upper cylinder shell (102) is continuously transferred to the piston chamber. Then, the air inside the piston chamber is discharged through the first one-way valve (700), making the lower cylinder shell (101) and the upper cylinder shell (102) negative.

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