Vacuum heat preservation cover, vacuum heat preservation cup with one-way valve and vacuum heat preservation cover with one-way valve

Abstract

The invention relates to a vacuum heat preservation cover, a vacuum heat preservation cup with a one-way valve and a vacuum heat preservation cover with a one-way valve in the field of heat preservation containers, and is characterized in that the defect that heat in the heat preservation cup is dissipated too fast through the cover is overcome; experiments prove that the temperature of water in a vacuum layer cover is improved by 25.38% in unit time, in order to overcome the defect that a vacuum heat preservation container loses the heat preservation capacity due to chronic air leakage, a vacuum heat preservation cup and cover technology with a one-way valve is adopted, when the vacuum degree is reduced, the vacuum degree can be conveniently repaired, and the heat preservation effect is improved. And the purpose of reuse time of the service life before repairing is achieved.

Description

Technical Field

[0001] This invention relates to a vacuum insulation lid and a vacuum insulation cup with a one-way valve in the field of insulated containers. Background Technology

[0002] Insulated containers used in daily life are typically wrapped with materials that don't easily conduct heat to increase their insulation time. Reflective materials are used to redirect heat radiation back to the heat source, and the openings are sealed with corks to prevent heat convection between the inside and outside air, thus preventing heat loss. These measures are effective in preventing heat loss from the inside of the container. To significantly improve the insulation capacity of containers, a hollow interior is created, and after sealing, a vacuum is evacuated. This technology can greatly enhance the insulation effect of insulated containers. However, existing vacuum-insulated containers also have shortcomings. These include poor sealing of the drinking spout, causing a rapid decrease in heat retention; an inadequate seal of the plunger at the mouth, allowing internal heat to easily dissipate through convection with the outside air; and high heat conductivity between the internal plunger and the external lid, resulting in rapid heat loss and poor insulation. The rising steam from the hot water inside the thermos causes the drinking spout, inner lid, and plunger to overheat. The internal heat is conducted through the plunger material and exchanges heat too quickly with the external thermos lid, resulting in heat loss into the atmosphere. This is a significant factor contributing to the temperature drop. A vacuum layer can prevent heat conduction and convection, reducing heat transfer and significantly improving the heat retention capacity of a thermos. Therefore, vacuum layer technology is widely used in the manufacture of thermos containers. However, it is not used in the manufacture of lids for thermos containers. The vacuum insulated lid of a vacuum insulated cup container is composed of an inner wall, an outer wall, an inner lid bottom, and an outer lid bottom, which are adjacent to each other at a certain distance and then welded together with the lid opening to form a hollow space with layers. There is a vacuum hole at the outer lid bottom, and a vacuum-sealed plug is placed over the vacuum hole. The vacuum insulated lid is a finished product with a good seal obtained through a tailless process. The vacuum space of a vacuum insulated cup is also composed of welded components such as the cup mouth, inner and outer walls, and inner and outer bottom. Their disadvantages and shortcomings include: vacuum insulated containers are prone to slow leakage, losing their heat retention ability. The reason is that poor welding quality can lead to chronic air leakage in the weld that cannot be detected in a short period of time. This causes a decrease in the insulation capacity and eventual failure of a new vacuum insulated container after one or several years of use. However, the vacuum insulated cup and lid may appear undamaged. The reason is likely that the lid of the vacuum insulated cup can also be used as a bowl for hot water. Due to the high frequency of use, vacuum insulated cups and lids are prone to being dropped or crushed, causing minor weld cracks and slow leakage. This leads to a decrease in the vacuum level, significantly reducing or even eliminating the heat retention capacity of the vacuum insulated cup or lid. Summary of the Invention

[0003] The purpose of this invention is to improve the vacuum insulation effect of vacuum insulated cups, enhance the insulation capacity of the drinking port and the overall container, extend the insulation time of hot water at a certain temperature inside the container, and significantly prevent the transfer, radiation, and convection of heat from the inside of the cup to the outside space. Repeated experiments demonstrated the effectiveness of the vacuum insulation lid. One experiment involved preparing two identical vacuum insulated cups, and fabricating a lid with a vacuum layer on one of them. The purpose of the experiment was to verify the insulation capability of the vacuum insulated lid with a vacuum layer. They were filled with hot water at the same temperature, and the difference in heat retention was compared after a period of time. The experimental results confirmed that the thermos with a vacuum layer lid had a heat retention capacity 5 degrees Celsius higher than that of the thermos without a vacuum layer lid. Repeated experiments proved that the water temperature inside the thermos with a vacuum layer lid was 5 degrees Celsius higher. Vacuum insulated lids for vacuum insulated cups can be manufactured directly to match the container, or they can be made separately to meet the upgrade needs of vacuum insulated cups that do not yet have lids. Another experiment involved pouring 41°C hot water into two vacuum-insulated cups, filling the water to half the capacity. After 68 minutes at a room temperature of 22°C, the water temperature was observed. The cup with the vacuum-sealed lid saw a 10°C decrease in temperature, while the cup without the vacuum-sealed lid experienced a 13.4°C decrease. This means the cup's insulation capacity increased by 25.38% per unit time. The purpose of this invention is to address the problem that, after prolonged use, vacuum insulated cups and vacuum insulated lids experience chronic air leakage and a decrease in vacuum level, resulting in poor heat retention. This invention aims to quickly and conveniently restore the vacuum level and heat retention capacity, thereby extending the service life of the cups and lids, through a one-way valve. The first step was to determine whether the one-way valve could be used under high negative pressure to prevent external gas from entering the vacuum space of the small container. The small sealed container was equipped with a ball valve and a one-way valve. After closing the ball valve, the sealed container was placed in a defoaming chamber, which was pressurized to -0.09 MPa. The purpose of the experiment was to determine whether the gas inside the small container could be discharged through the one-way valve and whether it could prevent the intrusion of external atmosphere. After releasing the negative pressure in the defoaming chamber, the small container was removed. Opening the ball valve resulted in a loud intake sound of air entering the small container. This experiment demonstrated that the gas inside the small container could be discharged through the one-way valve, and that the one-way valve, when releasing the negative pressure in the defoaming chamber, could also prevent external gas from entering the small container. The experiment was repeated after attaching a negative pressure gauge to a small container. When negative pressure was applied to the defoaming tank, the reading on the negative pressure gauge did not change. When the negative pressure was released from the defoaming tank, the reading on the negative pressure gauge rose to the value of the negative pressure applied to the defoaming tank. The experiment proved that the one-way valve effectively performed the tasks of venting the gas inside the container and preventing the intrusion of external gas. Attached Figure Description The objective of this invention is achieved as follows: the accompanying drawings are schematic diagrams of this invention. Figure 1 This is a cross-sectional view of a vacuum insulated cup container. Figure 2 This is a cross-sectional view of the inner lid of a vacuum insulated cup. Figure 3 This is a cross-sectional view of a vacuum insulation cover. Figure 4 This is a cross-sectional view of a vacuum insulation cover with a one-way valve. Figure 5 This is a cross-sectional view of a vacuum insulated cup with a one-way valve. Figure 6 This is a partial cross-sectional view of the outlet end of a special one-way valve for a vacuum insulation cover with a one-way valve. Figure 7 This is a cross-sectional view of the inner lid of a vacuum insulated cup with a one-way valve, described below: The purpose of this vacuum insulation cover invention is achieved as follows, refer to... Figure 1 , Figure 2 , Figure 3 The following is a description: The vacuum insulated cup (1) is composed of an inner wall (2), an outer wall (3), an inner wall bottom (4), and an outer wall bottom (5) that are adjacent to each other at a certain distance and welded together with the cup port (6) to form a hollow space (7) with a double layer. There is a vacuum hole (8) at the outer wall bottom (5), and a vacuum sealing plug (9) is placed on the vacuum hole (8). Then it is placed in a vacuum box. During the process of the vacuum box being evacuated, the gas in the hollow space (7) is simultaneously drawn out between the vacuum hole (8) and the vacuum sealing plug (9) to create a vacuum. Using a tailless process, the vacuum-sealed plug (9) at the bottom of the outer wall cup (5) is locally heated. When the temperature reaches a certain point, the two parts melt together without deformation. After cooling, the purpose of sealing the hollow space (7) is achieved. After releasing the negative pressure in the vacuum box, the vacuum thermos cup (1) is taken out. The sealing ring (12) at the end of the plunger (11) of the port (6) of the vacuum thermos (1) slides and presses against each other. When the inner cover (13) is rotated, the inner cover thread (14) interacts with the inner cover thread (15) of the vacuum thermos (1), causing the plunger (11), the sealing ring (12) and the sealing port (16) inside the thermos to seal or open. A vacuum insulated cup (1) has a vacuum insulated lid (17) consisting of an inner wall (18), an outer wall (19), an inner wall lid bottom (20), and an outer wall lid bottom (21) that are adjacent to each other at a certain distance and welded together with the lid opening (22) to form a sealed hollow space (23) with a double layer. There is a vacuum hole (25) at the outer wall lid bottom (21), and a vacuum sealing plug cover plate (26) is attached to the vacuum hole (25) for assembly. The vacuum insulated cup (1) has a threaded connection (27) at the inner circle of the lower round opening of the vacuum insulated cup (1), which rotates with the threaded connection (28) of the outer lid of the vacuum insulated cup (1). The inner lid (13) of the vacuum insulated cup (1) has a sealing ring (29) at the upper end, which slides and presses against the sealing round port (30) of the vacuum insulated cup (1) to seal or open. Then it is placed in a vacuum box. During the process of the vacuum box being evacuated by negative pressure, the gas in the hollow space (23) is simultaneously drawn out between the vacuum hole (25) and the vacuum sealing plug cover plate (26) to become a vacuum. Using a tailless process, local heating is applied to the vacuum hole (25) and vacuum sealing plug cover plate (26) on the outer wall bottom (21). When a certain temperature is reached, the parts of the outer cover bottom (21) are melted together without deformation. After cooling, the purpose of sealing the hollow space (23) is achieved. After releasing the negative pressure in the vacuum chamber, it can be used as a vacuum insulation cover (17) for vacuum insulated cups (1). In summary, the vacuum obtained by a vacuum insulation cover (17) is achieved by placing it inside a vacuum chamber. While the inside of the vacuum chamber is evacuated by negative pressure, the gas in the hollow space (23) is also extracted and then sealed, forming a vacuum space with a certain negative pressure. Its characteristics are: it has an inner wall (18), an outer wall (19), an inner wall cover bottom (20), and an outer wall cover bottom (21) that are adjacent to each other at a certain distance and are welded to the cover opening (22) to form a cover with a hollow space (23). At the vacuum hole (25) of the outer wall cover bottom (21), there are vacuum sealing plugs (26) that are in contact with each other. Under the negative pressure vacuum environment, they are locally heated and melted to connect, forming a sealed hollow space (23) with a certain negative pressure. This is applied to a vacuum insulation cover (17). The purpose of this invention of a vacuum insulation cover with a one-way valve is achieved as follows, referring to... Figure 4 , Figure 5 , Figure 6 The following is a description: A vacuum insulation cover (41) with a one-way valve has a threaded (42) at the lower port, a sealing round port (43), an outer cover wall (44), and an inner cover wall (45). These are welded and sealed together with the cover opening (46). There is a hollow space (47) between the outer cover wall (44) and the inner cover wall (45). The outer cover wall (44) has a sealing port (48) for sealing the hollow space (47). The sealing port (48) is connected to a special nut (49) and welded to the outer cover wall (44) for sealing. (44) has a sealing port (48), the sealing port (48) is connected to a special nut (49) and then welded to the outer wall of the outer cover (44) for sealing. A vacuum insulation cover (41) with a one-way valve is welded and sealed. The air inlet end (51) of the special one-way valve (50) is connected to the special nut (49) for rotational movement and sealing. On the outer wall of the outer cover (44), there is a sealing connection of one or more special one-way valves (50) that can only discharge the gas in the hollow space (47) and prevent the gas in the external space from entering the hollow space (47). A vacuum insulation cover (41) with a one-way valve has a threaded connection (42) inside its lower port, which rotates with the threaded connection (69) of the outer cover of a vacuum insulation cup (58) with a one-way valve. The inner cover (79) of the vacuum insulation cup (58) has a sealing ring (81) at its upper end, which slides and presses against the sealing round port (43) of the vacuum insulation cover (41) with a one-way valve to seal or open. When a vacuum insulation cover (41) with a one-way valve is made of metal, both the inner and outer walls can be integrally formed using sheet metal processing. The negative pressure vacuum is obtained as follows: A vacuum insulation cover (41) with a one-way valve is placed inside a vacuum container box. After sealing the vacuum container box, a vacuum container box with a certain negative pressure is created by negative pressure extraction. When the negative pressure inside the vacuum container box is greater than the negative pressure in the hollow space (47), the gas inside the hollow space (47) is extracted, passes through the inlet end (51) of the special one-way valve (50), and is extracted at the outlet end (53) of the special one-way valve (50). Then, the negative pressure inside the vacuum container is released. At the same time, the special one-way valve (50) automatically seals to prevent the gas entering the vacuum container from entering the hollow space (47). The vacuum container is opened and the hollow space (47) is taken out to obtain a certain negative pressure vacuum. A vacuum insulation cover (41) with a one-way valve is used. When the special one-way valve (50) is made of metal, after a vacuum is obtained in the hollow space (47), the end (54) of the outlet end (53) of the special one-way valve (50) is connected to a sealing gasket (55) in adjacent contact. The other end of the sealing gasket (55) is connected to the fastening nut cap (56) in adjacent contact. The thread (57) of the fastening nut cap (56) and the end (54) of the outlet end (53) of the special one-way valve (50) rotates and moves adjacent to each other, interacting to press the sealing gasket (55) tightly, thus achieving a reliable seal of the outlet end (53) of the special one-way valve (50) to prevent gas from entering the hollow space (47) of the cup through the outlet end (53) of the special one-way valve (50). When the special check valve (50) is made of a plastic material, after a vacuum is obtained in the hollow space (47), the end (54) of the outlet end (53) of the special check valve (50) can be directly heated and melted to seal the outlet end. The purpose is to seal the outlet end (53) of the special check valve (50), thus achieving a reliable seal of the outlet end (53) of the check valve. A vacuum insulation cover (41) with a one-way valve, when the dedicated one-way valve (50) is made of metal, after a vacuum is obtained in the hollow space (47), there is a sealing gasket (55) adjacent to the end (54) of the outlet end (53) of the dedicated one-way valve (50). The sealing gasket (55) interacts with the thread (57) of the end (54) of the outlet end (53) of the dedicated one-way valve (50) by rotating the fastening nut cap (56), pressing the sealing gasket (55) tightly, and realizing a reliable seal for the outlet end (53) of the one-way valve. The goal is to restore the service life of a vacuum insulation cover (41) with a one-way valve to the original service life after repair. The air inlet (51) of the one-way valve is directly connected to the hollow space (47) of a vacuum insulation cover (41) with a one-way valve after sealing. When a certain negative pressure vacuum degree is reached, the special one-way valve (50) will automatically close when the negative pressure of the vacuum container is released, preventing external gas from entering the hollow space (47), thereby obtaining a vacuum insulation cover (41) with a negative pressure vacuum space. The purpose of this invention of a vacuum insulated cup with a one-way valve is achieved as follows, referring to... Figure 4 , Figure 5 , Figure 7 The following is a description: A vacuum insulated cup (58) with a one-way valve has an inner wall (59), an outer wall (60), an inner wall bottom (61), and an outer wall bottom (62) that are adjacent to each other at a certain distance and welded together with the cup port (63) to form a hollow space (64) with a double layer. There is a vacuum hole (65) at the cup bottom (62) on the outer wall. The vacuum hole (65) is connected to a special nut (66) for the cup and welded to the cup bottom (62) to form a seal. A vacuum insulated cup (58) with a one-way valve is welded and sealed. It has one or more cup-specific one-way valves (67) on the bottom of the outer wall (62) that can only discharge gas from the hollow space (64) of the cup and prevent gas from the external space from entering the hollow space (64). The air inlet (70) of the cup-specific one-way valve (67) is rotatably and sealingly connected to the cup-specific nut (66). The negative pressure vacuum is obtained as follows: A vacuum insulated cup (58) with a one-way valve is placed in a vacuum container box, then the vacuum container box is sealed, and then a vacuum container box with a certain negative pressure is created. When the negative pressure inside the vacuum container box is greater than the negative pressure in the hollow space (64) of the cup, the gas inside the hollow space (64) of the cup is extracted, passes through the cup inlet end (70) of the cup-specific one-way valve (67), and reaches the cup outlet end (71) of the cup-specific one-way valve (67) to be extracted. Then, the negative pressure in the vacuum container is released. At the same time, the cup-specific one-way valve (67) automatically seals to prevent the gas entering the vacuum box from entering the cup's hollow space (64). The vacuum container is opened and the cup's hollow space (64) is taken out to obtain a certain negative pressure vacuum. This is a vacuum thermos cup with a one-way valve (58). A vacuum insulated cup (58) with a one-way valve is fitted with an inner lid (79) and an outer lid of a vacuum insulated cover (41) with a one-way valve; the cup port (63) of the vacuum insulated cup (58) is slidably pressed against the sealing ring (78) at the lower end of the plunger (77) when the inner lid (79) is rotated, and the inner lid threads (80) interact with the inner lid threads (68) of the vacuum insulated cup (58) with a one-way valve, causing the plunger (77), the sealing ring (78) and the cup sealing port (76) inside the vacuum insulated cup (58) with a one-way valve to slide and press against each other to seal or open. A vacuum insulation cover (41) with a one-way valve has a threaded connection (42) inside its lower port, which rotates with the threaded connection (69) of the outer cover of a vacuum insulation cup (58) with a one-way valve. The inner cover (79) of the vacuum insulation cup (58) has a sealing ring (81) at its upper end, which slides and presses against the sealing round port (43) of the vacuum insulation cover (41) with a one-way valve to seal or open. Selection of a dedicated check valve (67) for cups: Prioritize check valves with an air barrier rate of 99.8% as specified by the manufacturer. Even with this, there is still a leakage rate of 0.02%. It is best to use a check valve with an air barrier rate of 99.8% as the dedicated check valve for this invention, which has a leakage rate of 0.02%. Given that all one-way valves leak to varying degrees under -0.098 MPa conditions, the vacuum space (64) must reliably seal the outlet of the one-way valve in the shortest possible time after obtaining a certain negative pressure vacuum, requiring an air barrier rate of 100%. When the cup-specific one-way valve (67) is made of a plastic material, after a vacuum is obtained in the hollow space (64) of the cup, the end (72) of the cup outlet (71) of the cup-specific one-way valve (67) can be directly heated to melt the thermoplastic seal. The purpose is to seal the cup outlet (71) of the cup-specific one-way valve (67) to prevent gas from entering the cup hollow space (64) through the cup outlet (71) of the one-way valve. When the cup-specific one-way valve (67) is made of metal material, after a vacuum is obtained in the hollow space (64) of the cup, the end (72) of the cup outlet end (71) of the cup-specific one-way valve (67) is connected to the cup sealing gasket (73). The other end of the sealing gasket (73) is connected to the fastening nut cap (74). The cup sealing gasket (73) is pressed tightly by the interaction between the cup fastening nut cap (74) and the cup end thread (75) of the end (72) of the cup outlet end (71) of the cup-specific one-way valve (67).

[0004] A reliable seal is achieved at the outlet end (71) of the cup check valve to prevent gas from entering the hollow space (64) of the cup through the outlet end (71) of the check valve. The air inlet (70) of the one-way valve is directly connected to the hollow space (64) of the sealed vacuum thermos cup (58) with a one-way valve. When a certain negative pressure vacuum is reached, the one-way valve (67) of the cup will automatically close when the negative pressure of the vacuum container is released, preventing external gas from entering the hollow space (64) of the cup, thereby obtaining a vacuum thermos cup (58) with a negative pressure vacuum space. In summary, when the heat preservation time of a vacuum insulated cup (58) with a one-way valve and a vacuum insulated lid (41) with a one-way valve decreases or they become chronically ineffective, the vacuum level inside the vacuum insulated cup (58) with a one-way valve and the vacuum insulated lid (41) with a one-way valve can be easily and quickly increased, so that they can regain their good heat preservation capabilities. A vacuum insulated cup (58) with a one-way valve and a vacuum insulated lid (41) with a one-way valve can quickly and easily restore their vacuum level when their insulation capacity decreases due to chronic leakage, thereby extending their service life and achieving a standard of restoring their service life to the level before repair. The advantages of using a one-way valve for sealing and vacuuming under negative pressure include eliminating the need for the tailless process, which requires melting stainless steel in a vacuum environment at 1000 degrees Celsius. This also shortens the gap between the inner and outer walls of the thermos container, thereby increasing its capacity. The external shape of the one-way valve can be made into a handle, such as a stemmed glass, or into various cartoon shapes, such as zodiac animals, trendy fairy tales and movie cartoon characters, such as the image of Nezha. It can also be made into any shape, such as semi-circular, flat, or round, to increase its applicability and aesthetics, allowing people to choose what they need and like.

Claims

1. A vacuum insulation cover (17) obtains a vacuum by placing it inside a vacuum chamber. While the inside of the vacuum chamber is evacuated by negative pressure, the gas in the hollow space (23) is also extracted and then sealed, forming a vacuum space with a certain negative pressure. Its characteristics are: It has an inner wall (18), an outer wall (19), an inner wall cover (20), and an outer wall cover (21) that are adjacent to each other at a certain distance and are welded to the cover opening (22) to form a cover with a hollow space (23). At the vacuum hole (25) of the outer wall cover (21), there are vacuum sealing plugs (26) in contact with each other. Under the negative pressure vacuum environment, they are locally heated and melted to form a sealed hollow space (23) with a certain negative pressure. It is applied to a vacuum heat preservation cover (17).

2. A vacuum insulation cover (41) with a one-way valve has a threaded (42) inside the lower port, a sealed round port (43), an outer wall (44) of the outer cover, and an inner wall (45) of the outer cover. After these are welded and sealed together with the cover opening (46), there is a hollow space (47) between the outer wall (44) and the inner wall (45) of the outer cover. There is a sealing port (48) on the outer wall (44). Its feature is that the sealing port (48) is connected to a special nut (49) and then welded and sealed to the outer wall (44). The vacuum insulation cover (41) with a one-way valve after welding and sealing has a special one-way valve (50) with an air inlet end (51) connected to a special nut (49) for rotational movement and sealing. That is, on the outer wall (44) of the outer cover, there is a sealed connection of one or more special one-way valves (50) that can only discharge gas from the hollow space (47) and prevent gas from the external space from entering the hollow space (47). When the special check valve (50) is made of plastic material, after a vacuum is obtained in the hollow space (47), the end (54) of the outlet end (53) of the special check valve (50) can be directly heated and melted to form a thermoplastic seal. When the special check valve (50) is made of metal material, after a vacuum is obtained in the hollow space (47), the end (54) of the outlet end (53) of the special check valve (50) is connected to a sealing gasket (55) in adjacent contact. The other end of the sealing gasket (55) is connected to the fastening nut cap (56) in adjacent contact. The thread (57) of the fastening nut cap (56) and the end (54) of the outlet end (53) of the special check valve (50) rotate and contact adjacently, interacting to press the sealing gasket (55) tightly.

3. A vacuum insulated cup (58) with a one-way valve has an inner wall (59), an outer wall (60), an inner wall bottom (61), and an outer wall bottom (62) that are adjacent to each other at a certain distance and are connected to the cup port (63). Welded together, forming a layered hollow space (64) in the cup. There is a vacuum hole (65) at the bottom (62) of the cup on the outer wall. Its features are: the vacuum hole (65) is connected to the cup-specific nut (66) and welded to the bottom (62) of the outer wall of the cup to form a sealed structure. The vacuum insulated cup (58) with a one-way valve is well welded and sealed. It has one or more cup-specific one-way valves (67) on the bottom (62) of the outer wall of the cup that can only discharge gas from the hollow space (64) of the cup and prevent gas from the external space from entering the hollow space (64). The air inlet (70) of the cup-specific one-way valve (67) is rotatably and sealingly connected to the cup-specific nut (66). When the cup-specific one-way valve (67) is made of plastic material, after the vacuum is obtained in the hollow space (64) of the cup, the end (72) of the cup outlet (71) of the cup-specific one-way valve (67) can be directly heated and melted to seal the thermoplastic seal. When the cup-specific one-way valve (67) is made of metal material, after a vacuum is obtained in the hollow space (64) of the cup, the end (72) of the cup outlet end (71) of the cup-specific one-way valve (67) is connected to the cup sealing gasket (73). The other end of the sealing gasket (73) is connected to the fastening nut cap (74). The cup sealing gasket (73) is pressed tightly by the interaction between the cup fastening nut cap (74) and the cup end thread (75) of the end (72) of the cup outlet end (71) of the cup-specific one-way valve (67).

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