WO2019007099A1

WO2019007099A1 - Novel method for manufacturing vacuum heat-insulating container, and vacuum heat-insulating container manufactured thereby

Info

Publication number: WO2019007099A1
Application number: PCT/CN2018/078673
Authority: WO
Inventors: 刘敏业
Original assignee: 佛山市铠斯钛科技有限公司
Priority date: 2017-07-01
Filing date: 2018-03-12
Publication date: 2019-01-10
Also published as: CN107296522A

Abstract

Disclosed are a method for manufacturing a vacuum heat-insulating container, and a vacuum heat-insulating container manufactured thereby. The manufacturing method comprises the followings: step A, making the bottom of a shell (11) protrude from inside to outside to form an air vent groove (111); step B, welding a low-temperature sealing layer (2) onto an inner wall of the air vent groove (111), so that the air vent groove (111) and the low-temperature sealing layer (2) form a composite layer (3); and step C, providing an air vent hole (31) in the composite layer (3). The air vent hole (31) is blocked by the low-temperature sealing layer (2) from the interior of a container main body, so that the air in a heat-insulating cavity (13) can also be completely drawn off by means of vacuumizing in a state where the container main body is placed upright, thereby realizing the perfect vacuum and improving the heat-insulating quality. Moreover, the low-temperature sealing layer (2) is welded onto the inside of the shell (11), the direction of gravity of the low-temperature sealing layer (2) is the same as the direction of an adhesive force between the low-temperature sealing layer and the shell (11), and since the shell (11) has a function of supporting the low-temperature sealing layer, the low-temperature sealing layer (2) will not easily fall off after being used for a long time, such that air can effectively be prevented from entering the heat-insulating cavity (13) by passing through the air vent hole (31), thus ensuring the heat-insulating effect of a vacuum heat-insulating container.

Description

Novel vacuum insulated container manufacturing method and vacuum insulated container manufactured thereby

Technical field

The invention relates to the field of vacuum insulation containers, in particular to a novel vacuum insulation container manufacturing method and a vacuum insulation container manufactured thereby.

Background technique

The conventional method for manufacturing a tailless vacuum insulated container is to recess from the outside to the inside at the bottom of the container body 1 and to form a protrusion 41 on the inner surface thereof, as shown in FIG. 1 , and to provide a vent hole 31 in the protrusion 41; When vacuuming, the container body 1 needs to be placed upside down, that is, the bottom of the container body 1 faces upward, and a solid glass glue is disposed on the vent hole 31, and vacuum is applied in a high temperature environment exceeding the melting point of the glass glue, so that the glass glue is vacuumed. The vent hole 31 is melted and sealed on the outer surface of the container body 1, and then cooled to a normal temperature to cure the glass glue, thereby producing a vacuum heat insulating container. The existing manufacturing method has to reverse the container body 1 so that the glass glue placed on the outer surface of the container body 1 melts and seals the vent hole 31. Since the container body 1 is placed upside down, the air is relatively heavy in a vacuum state, so that under the action of gravity, part of the residual air remains on the top of the heat insulating chamber 13 of the container body 1, and complete vacuum cannot be achieved, and the heat preservation quality is lowered. Further, the container body 1 is a metal material, and the glass glue is a non-metal material, so the degree of fusion and adhesion of the glass glue and the container body 1 is not good, and the glass glue is bonded to the outer surface of the container body 1, glass. The direction of gravity of the glue and its direction of adhesion to the container body 1 are opposite, so that the glass glue is easily dropped after a long period of use, and the air enters the heat insulating chamber 13 through the vent hole 31, causing the vacuum heat insulating container to lose the heat insulating effect.

Summary of the invention

The object of the present invention is to provide a novel vacuum insulated container manufacturing method which can realize vacuuming in a state where the container is placed in a state of being placed, realizes complete vacuum, improves the heat preservation quality, effectively prevents air from entering the heat insulating cavity through the vent hole, and ensures the heat preservation effect. It is a vacuum insulated container manufactured by it.

To this end, the present invention employs the following technical solutions:

A novel vacuum insulation container manufacturing method comprises the following steps:

Step A, protruding the bottom of the outer casing from the inside to the outside to form an exhaust groove;

Step B, welding a low temperature sealing layer on the inner wall of the exhaust groove, so that the exhaust groove and the low temperature sealing layer constitute a composite layer;

Step C, providing a vent hole in the composite layer;

Step D, the inner casing is installed in the outer casing to form a container body, the container body forms a heat retention chamber between the outer casing and the inner casing, and the low temperature sealing layer is disposed in the heat retention chamber;

Step E, vacuuming and heating the bottom of the container body, that is, the bottom of the outer casing, so that after the vacuum chamber of the container body is evacuated, the low temperature sealing layer is melted by heat and flows from top to bottom. The container body is vacuum-insulated until the vent hole is sealed.

Preferably, the low temperature sealing layer is a metal material having a melting point of less than 1000 ° C.

Preferably, the low temperature sealing layer is prepared using an aluminum alloy or a copper alloy.

Preferably, in the step B, a plurality of the low temperature sealing layers are welded on the inner wall of the exhaust groove.

Preferably, the outer casing is made of titanium or stainless steel.

Preferably, the heating temperature of the vacuuming of the step E is less than 1000 °C.

Preferably, in the step E, the container body is placed in the high vacuum brazing apparatus with the bottom of the outer casing facing downward to be evacuated and heated.

Preferably, the vacuum insulated container manufactured by the method, the container body comprises an outer casing and an inner casing, the top of the outer casing is provided with an upper opening, the top of the inner casing is provided with an opening; and the inner casing is mounted on the outer casing Inside, and forming an insulation chamber between the outer casing and the inner casing;

The bottom of the outer casing is provided with an exhaust groove protruding from the inner side, and the exhaust groove is provided with the exhaust hole;

The inner wall of the exhaust groove is provided with the low temperature sealing layer, and the low temperature sealing layer seals the exhaust hole.

Preferably, the outer casing comprises a casing body and a bottom cover, the bottom cover is welded to a bottom of the casing body, the top of the casing body is provided with the upper opening, and the bottom of the bottom cover is provided to protrude from the inside to the outside a venting groove, the venting groove is provided with the venting hole;

The inner casing is mounted in the outer casing body, and the heat retention chamber is formed between the outer casing main body, the bottom cover and the inner casing.

Preferably, the side of the bottom of the outer casing is provided with a supporting annular groove, and the bottom of the supporting annular groove is lower than the bottom of the exhaust groove.

The novel vacuum insulated container manufacturing method is to form an exhaust groove from the inside to the outside at the bottom of the outer casing; firstly, a low-temperature sealing layer is welded on the inner wall of the exhaust groove, and then a through-venting groove and a low-temperature sealing layer are disposed. The vent hole is then installed in the outer casing to form the container body, so that the low temperature sealing layer is disposed inside the container body.

When vacuuming, the container body is placed under the bottom of the outer casing and vacuumed and gradually heated to the melting point temperature of the low temperature sealing layer. After the vacuum chamber of the container body is evacuated, the low temperature sealing layer melts and follows. The venting groove flows from the top to the bottom to block the vent hole, and then cools to a normal temperature to solidify the low temperature sealing layer, thereby preparing a vacuum insulated container.

The low-temperature sealing layer seals the vent hole in the interior of the container body, so that the vacuum can be vacuumed in the state in which the container body is placed, so that the air in the heat-insulating chamber can be completely extracted, and the heat-insulating chamber can achieve complete vacuum and improve the heat preservation quality; Moreover, the low-temperature sealing layer is welded inside the outer casing, the direction of gravity of the low-temperature sealing layer is the same as the direction of the bonding force with the outer casing, and the outer casing has a supporting effect on the low-temperature sealing layer, so that the low-temperature sealing layer is not easily dropped after long-term use. It can effectively prevent air from entering the heat preservation chamber through the vent hole, and ensure the heat preservation effect of the vacuum heat preservation container.

DRAWINGS

The drawings further illustrate the invention, but the contents of the drawings do not constitute any limitation of the invention.

1 is a schematic view showing the structure of a main body of a conventional vacuum heat preservation container according to an embodiment of the present invention;

Figure 2 is a diagram showing a vacuumed state of a vacuum insulated container according to an embodiment of the present invention;

Figure 3 is an enlarged plan view showing a composite layer structure of one embodiment of the present invention;

4 is a schematic structural view of a vacuum insulated container according to an embodiment of the present invention;

Figure 5 is a schematic view showing another structure of a vacuum insulated container according to one embodiment of the present invention;

Figure 6 is an exploded view of another structure of the housing assembly of one of the embodiments of the present invention.

Wherein: outer casing 11; exhaust groove 111; low temperature sealing layer 2; composite layer 3; venting opening 31; inner casing 12; container body 1; holding chamber 13; protrusion 41; upper port 112; opening 121; 113; bottom cover 114; supporting annular groove 115.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

The method for manufacturing a novel vacuum insulated container of the present embodiment, as shown in FIG. 2, comprises the following steps:

Step A, the bottom of the outer casing 11 protrudes from the inside to the outside to form a venting groove 111;

Step B, as shown in Figure 3, the low temperature sealing layer 2 is welded on the inner wall of the exhaust groove 111, so that the exhaust groove 111 and the low temperature sealing layer 2 constitute a composite layer 3;

Step C, the vent hole 31 is provided in the composite layer 3;

Step D, the inner casing 12 is installed in the outer casing 11 to form a container body 1. The container body 1 forms a heat retention chamber 13 between the outer casing 11 and the inner casing 12, and the low temperature sealing layer 2 is disposed at the heat preservation. Inside the cavity 13;

Step E, as shown in FIG. 2, the container body 1 is placed, that is, the bottom of the outer casing 11 is vacuumed and heated, so that the vacuum chamber 13 of the container body 1 is evacuated, the low temperature. The sealing layer 2 is melted by heat to flow from the top to the bottom until the vent hole 31 is sealed, thereby forming the container body 1 which is vacuum-insulated.

The novel vacuum heat preservation container manufacturing method is to form an exhaust groove 111 from the inside to the outside at the bottom of the outer casing 11; firstly, the low temperature sealing layer 2 is welded on the inner wall of the exhaust groove 111, and then a through-venting groove is provided. 111 and the vent hole 31 of the low temperature sealing layer 2, and then the inner casing 12 is mounted in the outer casing 11 to form the container body 1, so that the low temperature sealing layer 2 is disposed inside the container body 1. When vacuuming, the container body 1 is placed, that is, the bottom of the outer casing 11 is vacuumed downward and gradually heated to the melting point temperature of the low temperature sealing layer 2, so that the heat insulating chamber 13 of the container body 1 is evacuated and sealed at a low temperature. The layer 2 is melted and flows from the top to the bottom along the exhaust groove 111 to block the vent hole 31, and is cooled to a normal temperature to cure the low temperature seal layer 2, thereby producing a vacuum heat insulating container. The low temperature of the low temperature sealing layer 2 means that the melting point of the low temperature sealing layer 2 is lower than the melting point of the outer casing 11, so that when the melting point of the low temperature sealing layer 2 has arrived, the low temperature sealing layer 2 is melted so that the row can be closed. The air vent 31, while the outer casing 11 is far from reaching its own melting point, so that the low temperature sealing layer 2 can seal the venting opening 31. The vacuum heat preservation container may be a vacuum thermos flask, a vacuum flask and a vacuum heat preservation box.

In the manufacturing method of the novel vacuum heat insulating container, the low temperature sealing layer 2 blocks the vent hole 31 inside the container body 1, so that the vacuum can be evacuated in the state in which the container body 1 is placed, thereby keeping the air in the cavity 13 Can be completely extracted, the heat preservation chamber 13 achieves complete vacuum, and the heat preservation quality is improved; and, the low temperature seal layer 2 is welded inside the outer casing 11, the gravity direction of the low temperature seal layer 2 and its adhesive force direction with the outer casing 11 are the same, and the outer casing 11 has a supporting effect on the low-temperature sealing layer 2, so the low-temperature sealing layer 2 is not easy to fall after long-term use, and can effectively prevent air from entering the holding chamber 13 through the vent hole 31, thereby ensuring the heat insulating effect of the vacuum heat insulating container.

Preferably, the low temperature sealing layer 2 is a metal material having a melting point of less than 1000 °C. Compared with the solid glass glue, the low-temperature sealing layer 2 of the metal material is not easily broken, has high strength, and has better fusion degree with the outer casing 11 which is the same metal material, and is not easy to fall off; the metal material having a melting point lower than 1000 ° C is used for vacuuming. The temperature is appropriate to avoid the temperature being too high and the container body 1 is blackened, which does not affect the color formation of the product.

Preferably, the low temperature sealing layer 2 is prepared using an aluminum alloy or a copper alloy. The melting point of the aluminum alloy is in the range of 500 ° C - 700 ° C, the melting point of the copper alloy is in the range of 800 ° C - 900 ° C, the melting point temperature is moderate, and the fusion degree of the outer casing 11 which is the same metal material is better and not easy to fall off. Moreover, both aluminum alloy and copper alloy have good heat transfer performance, corrosion resistance and oxidation resistance.

Preferably, in the step B, a plurality of layers of the low-temperature sealing layer 2 are welded on the inner wall of the exhaust groove 111, thereby improving the hole-blocking effect and ensuring that the vent hole 31 is completely sealed.

Preferably, the outer casing 11 is made of titanium metal or stainless steel. The melting point of titanium metal is 1668 ° C, and the melting point of stainless steel is also above 1100 ° C. Therefore, the melting points of titanium metal and stainless steel are higher than that of low temperature sealing layer 2, and when the melting point of low temperature sealing layer 2 has arrived, low temperature sealing layer 2 melts, and At this time, the outer casing 11 of the material of titanium or stainless steel is far from reaching its own melting point, so the low temperature sealing layer 2 can seal the vent hole 31. Moreover, titanium metal or stainless steel is strong and strong, resistant to impact and abrasion, not easy to burst, avoiding the characteristics of burns caused by bursting, and has a long service life. Titanium also has a bactericidal effect.

Preferably, the heating temperature of the vacuuming of the step E is less than 1000 °C. The heating temperature of the vacuuming must exceed the melting point of the low-temperature sealing layer 2, but cannot exceed 1000 ° C, so as to ensure that the low-temperature sealing layer 2 melts and seals the vent hole 31, and prevents the temperature from being too high to make the container body 1 black, without affecting Product quality.

Preferably, in the step E, the container body 1 is placed in the high vacuum brazing apparatus with the bottom of the outer casing 11 facing downward to be evacuated and heated. Vacuuming and heating are carried out by high-vacuum brazing equipment. The high-vacuum brazing is used to melt the solder by high temperature in a vacuum environment to complete the welding between the parts, without welding pipes and sealing tubes, to realize the manufacture of the tailless vacuum insulated container, and vacuuming Good effect, suitable for mass production.

Preferably, the vacuum insulated container manufactured by the method, as shown in FIG. 4, the container body 1 includes a casing 11 and an inner casing 12, and the top of the casing 11 is provided with an upper port 112, the inner casing 12 The top portion is provided with an opening 121; the inner casing 12 is installed in the outer casing 11, and an insulating cavity 13 is formed between the outer casing 11 and the inner casing 12; the bottom of the outer casing 11 is provided with an exhaust groove protruding from the inner side. 111, the exhaust groove 111 is provided with the exhaust hole 31; the inner wall of the exhaust groove 111 is provided with the low temperature sealing layer 2, and the low temperature sealing layer 2 seals the exhaust hole 31.

The vacuum heat preservation container protrudes from the inside to the outside at the bottom of the outer casing 11 to form an exhaust groove 111. The low temperature sealing layer 2 blocks the exhaust hole 31 inside the container body 1, and can be realized in the container body 1 The vacuum is drawn in the state, so that the air in the heat retention chamber 13 can be completely extracted, the heat preservation chamber 13 achieves complete vacuum, and the heat preservation quality is improved; and the gravity direction of the low temperature seal layer 2 and its adhesive force direction with the outer casing 11 are the same, and The outer casing 11 has a supporting effect on the low-temperature sealing layer 2, so that the low-temperature sealing layer 2 is not easily dropped after long-term use, and the air can be effectively prevented from entering the holding chamber 13 through the vent hole 31, thereby ensuring the heat insulating effect of the vacuum heat insulating container. The vacuum heat preservation container has good heat preservation effect, is firm and firm, wear-resistant, is not easy to burst, avoids the characteristics of burns caused by bursting, has long service life and long heat preservation time. The vacuum heat preservation container may be a vacuum thermos flask, a vacuum flask and a vacuum heat preservation box.

Preferably, as shown in FIG. 5 and FIG. 6, the outer casing 11 includes a casing main body 113 and a bottom cover 114. The bottom cover 114 is welded to the bottom of the outer casing main body 113, and the top of the outer casing main body 113 is provided with the upper portion. The bottom portion of the bottom cover 114 is provided with an exhaust groove 111 protruding from the inside to the outside, the exhaust groove 111 is provided with the exhaust hole 31; the inner casing 12 is installed in the outer casing main body 113 And the heat retention chamber 13 is formed between the outer casing main body 113, the bottom cover 114 and the inner casing 12. The outer casing 11 is divided into a casing main body 113 and a bottom cover 114, and the outer casing main body 113 and the inner casing 12 can be assembled at the same time and the exhaust groove 111 of the bottom cover 114 can be simultaneously pressed to facilitate welding the low-temperature sealing layer 2 to the exhaust concave. The groove 111 and the vent hole 31 extending through the vent groove 111 and the low temperature seal layer 2, and finally the case main body 113, the bottom cover 114 and the inner case 12 are welded to obtain the container body 1, greatly improving the processing efficiency. And reduce the difficulty of processing.

Preferably, as shown in FIGS. 4 to 6, the side of the bottom of the outer casing 11 is provided with a support annular groove 115, and the bottom of the support annular groove 115 is lower than the bottom of the exhaust groove 111. The support annular groove 115 serves as a support stabilizing effect, and the bottom of the support annular groove 115 is lower than the bottom of the exhaust groove 111, preventing the exhaust groove 111 from protruding to make the container body 1 unstable. And reducing the wear of the exhaust groove 111, thereby preventing the low temperature seal layer 2 and the exhaust hole 31 from generating a gap to allow air to enter the heat retention chamber 13.

The technical principles of the present invention have been described above in connection with specific embodiments. The descriptions are merely illustrative of the principles of the invention and are not to be construed as limiting the scope of the invention. Based on the explanation herein, those skilled in the art can devise various other embodiments of the present invention without departing from the scope of the invention.

Claims

A novel vacuum insulation container manufacturing method, comprising the following steps:

Step A, protruding the bottom of the outer casing from the inside to the outside to form an exhaust groove;

Step B, welding a low temperature sealing layer on the inner wall of the exhaust groove, so that the exhaust groove and the low temperature sealing layer constitute a composite layer;

Step C, providing a vent hole in the composite layer;

Step D, the inner casing is installed in the outer casing to form a container body, the container body forms a heat retention chamber between the outer casing and the inner casing, and the low temperature sealing layer is disposed in the heat retention chamber;

Step E, vacuuming and heating the bottom of the container body, that is, the bottom of the outer casing, so that after the vacuum chamber of the container body is evacuated, the low temperature sealing layer is melted by heat and flows from top to bottom. The container body is vacuum-insulated until the vent hole is sealed.
The method of manufacturing a novel vacuum insulated container according to claim 1, wherein the low temperature sealing layer is a metal material having a melting point of less than 1000 °C.
The method of manufacturing a novel vacuum insulated container according to claim 1, wherein the low temperature sealing layer is made of an aluminum alloy or a copper alloy.
The method of manufacturing a novel vacuum insulated container according to claim 1, wherein in said step B, said plurality of said low temperature sealing layers are welded to an inner wall of said exhaust groove.
The method of manufacturing a novel vacuum insulated container according to claim 1, wherein the outer casing is made of titanium metal or stainless steel.
The method of manufacturing a novel vacuum insulated container according to claim 1, wherein the heating temperature of the vacuuming of the step E is less than 1000 °C.
The method for manufacturing a novel vacuum insulated container according to claim 1, wherein in the step E, the container body is placed in a high vacuum brazing apparatus with the bottom of the outer casing facing downward to perform vacuuming. And heated.
A vacuum insulated container manufactured by using the method according to any one of claims 1 to 7, wherein the container body comprises a casing and an inner casing, and a top of the casing is provided with an upper port, and a top of the inner casing is provided An opening; the inner casing is mounted in the outer casing, and an insulating cavity is formed between the outer casing and the inner casing;

The bottom of the outer casing is provided with an exhaust groove protruding from the inner side, and the exhaust groove is provided with the exhaust hole;

The inner wall of the exhaust groove is provided with the low temperature sealing layer, and the low temperature sealing layer seals the exhaust hole.
A vacuum insulated container according to claim 8, wherein said outer casing comprises a casing main body and a bottom cover, said bottom cover being welded to a bottom of said outer casing main body, said top portion of said outer casing main body being provided with said upper opening, The bottom of the bottom cover is provided with an exhaust groove protruding from the inside to the outside, and the exhaust groove is provided with the exhaust hole;

The inner casing is mounted in the outer casing body, and the heat retention chamber is formed between the outer casing main body, the bottom cover and the inner casing.
The vacuum insulated container according to claim 8, wherein a side of the bottom of the outer casing is provided with a support annular groove, and a bottom of the support annular groove is lower than a bottom of the exhaust groove.