Vacuumizing device and vacuum packaging equipment

Abstract

The utility model relates to the technical field of vacuum packaging, and discloses a vacuum-pumping device and vacuum packaging equipment, the vacuum-pumping device comprises a chamber, a vacuum-pumping assembly, a gas inlet assembly and a heating assembly, the chamber is used for placing core materials, the vacuum-pumping assembly is communicated with the chamber and is used for vacuumizing the chamber, the gas inlet assembly is communicated with the chamber and is used for introducing gas into the chamber, and the heating assembly is used for heating the chamber. The heating assembly is connected with the gas inlet assembly and used for heating gas flowing through the gas inlet assembly. By arranging the air inlet assembly and the heating assembly, when vacuumizing is carried out, the heating assembly heats air introduced into the cavity, after the air is introduced into the cavity and circulates for a certain time, the vacuumizing assembly vacuumizes the cavity, air in the core material is blown by hot air, and the air in the core material is discharged out of the cavity. According to the vacuum insulation panel, the hot gas is introduced into the core material, so that the gas in the core material is replaced by the hot gas, the gas in the core material is extracted more easily, the amount of the gas remaining in the core material is less finally, the vacuumizing efficiency and effect are improved, and the heat preservation performance of the vacuum insulation panel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum packaging, in particular to a vacuum pumping device and a vacuum packaging equipment. Background Technique

[0002] The information provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] The vacuum insulation panel includes a core material and a barrier film. After encapsulation, the internal vacuum degree can be reduced, the heat convection of the air inside the panel can be reduced, and the heat transfer inside the panel can be minimized, finally achieving a good heat preservation effect.

[0004] The existing vacuum pumping equipment uses vacuum pumping equipment such as vacuum pumps and molecular pumps to pump the core material inside the barrier film, with low efficiency and poor vacuum pumping effect, thus affecting the thermal conductivity of the vacuum insulation panel. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the problems of low vacuum pumping efficiency and poor vacuum pumping effect. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the utility model provides a vacuum pumping device, including:

[0007] A chamber for placing the core material;

[0008] A vacuum pumping component communicated with the chamber, and the vacuum pumping component is used for pumping the chamber;

[0009] An air inlet component communicated with the chamber, and the air inlet component is used for introducing gas into the chamber;

[0010] A heating component connected to the air inlet component, and the heating component is used for heating the gas flowing through the air inlet component.

[0011] The vacuum pumping device of the utility model, by setting an air inlet component and a heating component, when pumping vacuum, the heating component heats the gas introduced into the chamber, and at the same time the vacuum pumping component pumps the chamber. The gas inside the core material is purged by the hot gas, accelerating the escape speed of gas molecules, so that the gas inside the core material is displaced by the hot gas, making the gas inside the core material easier to be pumped out. Finally, the amount of gas remaining inside the core material is less, improving the vacuum pumping efficiency and vacuum pumping effect, reducing the initial thermal conductivity of the vacuum insulation panel, and enhancing the heat preservation performance of the vacuum insulation panel.

[0012] In addition, according to the vacuum pumping device of the utility model, the following additional technical features may also be provided:

[0013] In some embodiments of the present utility model, the air intake assembly includes a blower device and a first air inlet pipe. The inlet end of the first air inlet pipe is communicated with the outlet end of the blower device, and the outlet end of the first air inlet pipe is communicated with the inlet end of the chamber.

[0014] In some embodiments of the present utility model, the air intake assembly further includes a gas storage device and a second air inlet pipe. The inlet end of the second air inlet pipe is communicated with the outlet end of the gas storage device, and the outlet end of the second air inlet pipe is communicated with the inlet end of the blower device.

[0015] In some embodiments of the present utility model, the gas storage device includes at least one gas storage cylinder for storing gas.

[0016] In some embodiments of the present utility model, the air intake assembly further includes a first switching valve provided on the first air inlet pipe, and the first switching valve can selectively conduct or cut off the first air inlet pipe;

[0017] And / or, the air intake assembly further includes a second switching valve provided on the second air inlet pipe, and the second switching valve can selectively conduct or cut off the second air inlet pipe.

[0018] In some embodiments of the present utility model, the heating assembly includes a heating element provided on the air outlet path of the blower device and / or on the air suction path of the blower device.

[0019] In some embodiments of the present utility model, the heating element includes an electric heating wire.

[0020] In some embodiments of the present utility model, the vacuum pumping assembly includes:

[0021] A main pipeline;

[0022] A first pump assembly, including a first pump body, a first pipeline and a first control valve. The first pipeline communicates the first pump body and the main pipeline, the main pipeline is communicated with the chamber, and the first control valve is provided on the first pipeline to open and close the first pipeline;

[0023] A second pump body provided on the pipe section of the first pipeline between the first pump body and the first control valve.

[0024] In some embodiments of the present utility model, the vacuum pumping assembly further includes:

[0025] At least one third pump assembly, the third pump assembly including a third pump body, a third pipeline, and a third control valve, the third pipeline communicating the main pipeline and the third pump body, the third control valve being disposed in the third pipeline to open and close the third pipeline;

[0026] A fourth pump assembly, including a fourth pump body, a fourth pipeline, and a fourth control valve, the fourth pipeline communicating the first pipeline and the third pump body, the fourth control valve being disposed in the pipe section of the fourth pipeline between the first pipeline and the third pump body.

[0027] Another aspect of the present utility model provides a vacuum packaging device for vacuum packaging a core material, including a packaging device and the vacuum pumping device as described in any one of the above, the packaging device being disposed inside the chamber, the packaging device being used for packaging the core material. Description of the Drawings

[0028] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0029] Figure 1 Schematically shows a structural diagram of a vacuum pumping device provided according to an embodiment of the present utility model;

[0030] Figure 2 Schematically shows a structural diagram of a vacuum pumping device provided according to another embodiment of the present utility model.

[0031] The reference numerals are as follows:

[0032] 1, chamber;

[0033] 2, vacuum pumping assembly; 20, main pipeline;

[0034] 21, first pump assembly; 210, first pump body; 211, first pipeline; 212, first control valve;

[0035] 22, second pump body;

[0036] 23, third pump assembly; 230, first third pump body; 231, first third pipeline; 232, first third control valve; 233, second third pump body; 234, second third pipeline; 235, second third control valve;

[0037] 24, fourth pump assembly; 240, fourth pump body; 241, fourth pipeline; 242, fourth control valve;

[0038] 25. Fifth pump assembly; 250. Fifth pump body; 251. Fifth pipeline; 252. Fifth control valve;

[0039] 3. Intake assembly; 30. Blower device; 31. First intake pipe; 32. Gas storage device; 33. Second intake pipe; 34. First switching valve; 35. Second switching valve;

[0040] 4. Heating assembly. Detailed implementation manners

[0041] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0042] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0043] Although the terms first, second, third, etc. may be used in the text to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms used in the text do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0044] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "over" other elements or features. Thus, the exemplary term "below" can include both upper and lower orientations.

[0045] In the related art, when evacuating the core material, a vacuum pumping device such as a vacuum pump or a molecular pump is used to evacuate the core material in the barrier film, so that the core material can be encapsulated to form a vacuum inside the vacuum insulation panel. However, when evacuating a core material with high density and large thickness, the above-mentioned vacuum pumping method has low efficiency and poor vacuum pumping effect, which affects the thermal conductivity of the vacuum insulation panel and results in poor heat insulation performance of the vacuum insulation panel.

[0046] In view of this, the present embodiment provides a vacuum pumping device, aiming to heat the gas introduced into the chamber 1 while evacuating by adding an air inlet component 3 and a heating component 4, so that the gas inside the core material is displaced by the hot gas and is more easily pumped out, improving the vacuum pumping efficiency and the vacuum pumping effect, thereby solving the above technical problems.

[0047] As Figure 1 shown, according to an embodiment of the present invention, a vacuum pumping device for evacuating a core material is proposed. The vacuum pumping device includes: a chamber 1, a vacuum pumping component 2, an air inlet component 3 and a heating component 4. The chamber is used for placing the core material. The vacuum pumping component 2 is connected to the chamber 1 and is used for evacuating the chamber 1. The vacuum pumping component 2 is not limited to being installed inside or outside the chamber 1, as long as it is connected to the chamber 1 and ensures the airtightness of the chamber 1 during vacuum pumping, and can pump out the gas inside the chamber 1.

[0048] The air inlet component 3 is connected to the chamber 1 and is used for introducing gas into the chamber 1. The introduced gas can be air, or a specific gas such as an inert gas, or a large molecule gas with a large molecular weight such as carbon dioxide.

[0049] The heating component 4 is connected to the air inlet component 3 and is used for heating the gas flowing through the air inlet component 3. As Figure 1As shown, the heating component 4 can be integrated into the air intake component 3, and the heating component 4 is used to directly introduce hot gas into the chamber 1 through the air intake component 3. Alternatively, the heating component 4 can be arranged at the outlet end of the air intake component 3. For example, Figure 2 As shown, the heating component 4 of this embodiment is in communication with the chamber 1. The temperature of the gas coming out of the outlet end of the air intake component 3 is the same as the outside gas temperature. The gas at this temperature flows through the heating component 4, and the heating component 4 heats the gas. Then, the hot gas is introduced into the chamber 1 to evacuate the core material.

[0050] The vacuum insulation panel of this embodiment includes a core material and a barrier film. Among them, the core material can be a granular core material, a foam core material, a fiber core material, a composite core material, etc. Preferably, organic fiber can be used as the core material of the vacuum insulation panel. On the one hand, the organic fiber has a low thermal conductivity, which can effectively slow down heat transfer and provide excellent heat insulation effect; on the other hand, the organic fiber is relatively light, has good softness and plasticity, and is easy to process and install; on the other hand, the organic fiber has high durability and moisture resistance, can resist the influence of moisture and humid environment, is not easy to absorb moisture or rot, and has good working stability. The barrier film can be made of materials such as polyethylene terephthalate (PET) and polyethylene (PE). The barrier film wraps the outer surface of the core material. After evacuation treatment, the barrier film is sealed to make a vacuum insulation panel.

[0051] The vacuum pumping device of the present utility model is provided with an air intake component 3 and a heating component 4. When evacuating, the heating component 4 heats the gas introduced into the chamber 1. The temperature of the heated hot gas can be between 60°C and 80°C. After the hot gas is introduced into the chamber 1 and undergoes a certain period of cold and hot cycle, the time for introducing the hot gas can be 20 min - 40 min. The temperature of the chamber 1 increases accordingly after the hot gas is introduced, and the molecular thermal motion accelerates. Then, the vacuum pumping component 2 evacuates the chamber 1. At this time, the gas inside the core material is purged by the hot gas, so that the gas inside the core material is displaced by the hot gas, making it easier to pump out the gas inside the core material. Eventually, the amount of gas remaining inside the core material is less, improving the vacuum pumping efficiency and effect, reducing the initial thermal conductivity of the vacuum insulation panel, and enhancing the heat insulation performance of the vacuum insulation panel.

[0052] In some embodiments of the present utility model, the air intake component 3 includes a blower device 30 and a first intake pipe 31. The inlet end of the first intake pipe 31 is in communication with the outlet end of the blower device 30, and the outlet end of the first intake pipe 31 is in communication with the inlet end of the chamber 1.

[0053] Specifically, the air blowing device 30 is a blower, or it can also be other devices that can provide air flow to introduce gas into the chamber 1. The blower is connected to the heating component 4. The air inlet of the blower communicates with the air. The outdoor air is driven into the blower through the negative pressure input port, and then the heating component 4 is used to heat the air flow entering the blower, and it is introduced into the chamber 1 through the first air inlet pipe 31, so as to directly introduce hot gas into the chamber 1. After the gas is introduced into the chamber 1 and circulates for a certain time, the vacuum pumping component 2 pumps the chamber 1 to vacuum. The gas inside the core material is purged by the hot gas, and the gas inside the core material is displaced by the hot gas, making the gas inside the core material easier to be pumped out. Eventually, the amount of gas remaining inside the core material is less, improving the vacuum pumping efficiency and the vacuum pumping effect.

[0054] In some embodiments of the present invention, the heating component 4 includes a heating element, and the heating element is arranged on the air outlet path of the air blowing device and / or on the air suction path of the air blowing device. In this embodiment, the heating element includes an electric heating wire, and the electric heating wire is connected to a power source. The electric heating wire is located on the air outlet path of the air blowing device 30 or on the air suction path of the air blowing device 30, so that the air flow guided by the blower can be better heated by the electric heating wire, improving the heating effect and heating efficiency of the air flow.

[0055] In some other embodiments of the present invention, the heating element can also be a heating tube or a heating plate. In addition, the heating element can also be arranged inside the chamber 1. For example, there is a workbench for encapsulating the core material inside the chamber 1, and a heating element is arranged at the bottom of the workbench. The heating element can be a heating plate, and the size of the heating plate is adapted to the size of the workbench. The heating plate is in contact with the bottom surface of the workbench, so that the heat of the heating plate is transferred to the core material on the workbench, facilitating the rapid discharge of the gas inside the core material and improving the vacuum pumping effect and the vacuum pumping efficiency.

[0056] In some embodiments of the present invention, the air intake component 3 further includes a gas storage device 32 and a second air inlet pipe 33. The inlet end of the second air inlet pipe 33 is communicated with the outlet end of the gas storage device 32, and the outlet end of the second air inlet pipe 33 is communicated with the inlet end of the air blowing device 30.

[0057] In some embodiments of the utility model, the gas storage device 32 includes at least one gas storage bottle, which is used to store air or inert gas or a mixture of air and inert gas. At normal temperature and pressure, inert gas is a colorless and odorless monatomic gas, which is difficult to react chemically. For example, it can be one or more of helium (He), neon (Ne), argon (Ar) and the like. When the inert gas is introduced, on the one hand, the inert gas remaining in the vacuum insulation panel after evacuation has slow molecular motion, which makes the internal heat convection of the vacuum insulation panel slow, which has a positive effect on improving the thermal insulation performance of the vacuum insulation panel; on the other hand, due to the large molecular weight of the inert gas, the gas occupies a large space, so the gas content remaining in the barrier film and the core material is very small. In addition, the thermal motion of the gas requires higher energy, and the thermal convection of the gas is extremely weak. While reducing the initial thermal conductivity of the vacuum insulation panel, it can also ensure that the thermal conductivity is in a stable state for a long time, thereby improving the performance of the vacuum insulation panel.

[0058] In some embodiments of the utility model, the air intake component also includes a first switch valve 34, which is disposed on the first intake pipe 31, and the first switch valve 34 can selectively open or close the first intake pipe 31; and / or, the air intake component also includes a second switch valve 35, which is disposed on the second intake pipe 33, and the second switch valve 35 can selectively open or close the second intake pipe 33.

[0059] In this embodiment, a first switch valve 34 is provided on the first air inlet pipe 31. The first switch valve 34 may be a needle valve or a ball valve or other structural parts that can be conveniently connected or disconnected. When vacuuming, the first switch valve 34 may be used to connect the first air inlet pipe 31, so that the airflow entering the blower is heated by the heating assembly 4 and passed into the chamber 1 through the first air inlet pipe 31, so that hot gas is directly passed into the chamber 1. The first switch valve 34 may be used to block the first air inlet pipe 31 to stop the hot gas from passing into the chamber 1. A second switch valve 35 is provided on the second air inlet pipe 33. The second switch valve 35 may be a needle valve or a ball valve or other structural parts that can be conveniently connected or disconnected. When vacuuming, the second switch valve 35 may be used to connect the second air inlet pipe 33, so that the gas stored in the gas cylinder is passed to the blower. The second switch valve 35 may be used to block the second air inlet pipe 33 to stop the gas stored in the gas cylinder from being delivered to the blower. By providing the first switch valve 34 and the second switch valve 35 , the gas introduced into the chamber 1 can be flexibly controlled according to actual needs, thereby further improving the vacuuming efficiency and the vacuuming effect.

[0060] In some other embodiments of the present invention, the first switch valve 34 may be provided only on the first air intake pipe 31 , or the second switch valve 35 may be provided only on the second air intake pipe 33 .

[0061] In some embodiments of the present utility model, the vacuum pumping assembly 2 includes a main pipeline 20, a first pump assembly 21 and a second pump body 22. Among them, the first pump assembly 21 includes a first pump body 210, a first pipeline 211 and a first control valve 212. The first pipeline 211 communicates the first pump body 210 with the main pipeline 20. The main pipeline 20 is communicated with the chamber 1. The first control valve 212 is arranged on the first pipeline 211 to open and close the first pipeline 211. The first pump body 210 can be a roughing pump, and the first vacuum value can be between 1 kPa and 3 kPa. The second pump body 22 is arranged on the pipe section of the first pipeline 211 between the first pump body 210 and the first control valve 212. The second pump body 22 can be a Roots pump, and the second vacuum value can be between 0.01 Pa and 10 Pa.

[0062] When performing vacuum pumping, first open the chamber 1 and put in the core material, start the first pump body 210, and then open the first pipeline 211 through the first control valve 212 to pump vacuum for the chamber 1 so that the vacuum value in the chamber 1 reaches a first preset vacuum value, and the first preset vacuum value is between 1 kPa and 3 kPa. Exemplarily, the first preset vacuum value can be 1 kPa, 1.2 kPa, 1.4 kPa, 1.6 kPa, 1.8 kPa, 2 kPa, 2.2 kPa, 2.4 kPa, 2.6 kPa, 2.8 kPa or 3 kPa, etc. In this way, by setting a suitable first preset vacuum value, the escape speed of gas molecules on the surface and inside of the core material can be greatly increased, so that the temperature of the hot gas entering the chamber 1 is reduced, and energy consumption is saved.

[0063] When the vacuum value in the chamber 1 is pumped to the first vacuum value, start the second pump body 22 and cooperate with the first pump body 210 to continue pumping vacuum for the chamber 1 until the vacuum value in the chamber 1 is pumped to the second vacuum value, where the second vacuum value is less than the first vacuum value. By pumping vacuum in stages, on the one hand, the preset vacuum value can be gradually reached, so as to ensure the best vacuum effect in each stage; on the other hand, since the gas pressure changes little in each stage, the wear on the vacuum pumping device can be reduced, and the service life of the vacuum pumping device can be extended.

[0064] In some embodiments of the present utility model, the vacuum pumping assembly 2 further includes at least one third pump assembly 23 and a fourth pump assembly 24. The third pump assembly 23 includes a third pump body, a third pipeline and a third control valve. The third pipeline communicates the main pipeline 20 with the third pump body. The third control valve is arranged on the third pipeline to open and close the third pipeline; the fourth pump assembly 24 includes a fourth pump body 240, a fourth pipeline 241 and a fourth control valve 242. The fourth pipeline 241 communicates the first pipeline 211 with the third pump body. The fourth control valve 242 is arranged on the pipe section of the fourth pipeline 241 between the first pipeline 211 and the third pump body.

[0065] In this embodiment, the number of the third pump assemblies 23 is two, which can quickly make the vacuum value in the chamber 1 meet the requirements, and the vacuum pumping efficiency is high. One of the third pump assemblies 23 includes a third pump body I 230, a third pipeline I 231, and a third control valve I 232. The third pipeline I 231 connects the main pipeline 20 and the third pump body I 230, and the third control valve I 232 is arranged on the third pipeline I 231 to open and close the third pipeline I 231; the other third pump assembly 23 includes a third pump body II 233, a third pipeline II 234, and a third control valve II 235. The third pipeline II 234 connects the main pipeline 20 and the third pump body II 233, and the third control valve II 235 is arranged on the third pipeline II 234 to open and close the third pipeline II 234. The third pump body I 230 and the third pump body II 233 are connected. The third pump body I 230 and the third pump body II 233 can be diffusion pumps, and the third vacuum value can be between 0.001 Pa and 0.01 Pa.

[0066] The fourth pump body 240 can be a holding pump. When the gas volume during vacuum pumping is very small, a holding pump can be configured to maintain the operation of the main pump. The number of the fourth control valves 242 is two. The fourth pump body 240 is connected to the first pipeline 211, the third pump body I 230, and the third pump body II 233 through the fourth pipeline 241. Opening the two fourth control valves 242 can maintain the operation of the third pump body I 230, the third pump body II 233, the second pump body 22, and the first pump body 210 in a low vacuum state, so that the first pump body 210, the second pump body 22, the third pump body I 230, and the third pump body II 233 do not need to work in a high vacuum state for a long time, thereby reducing the energy consumption of the vacuum pumping device, reducing the wear and faults of the vacuum pumping device, and prolonging the service life of the vacuum pumping device.

[0067] In this embodiment, along the gas flow direction of the main pipeline 20, the connection points of the third pipeline I 231 and the third pipeline II 234 with the main pipeline 20 are located upstream of the connection point of the first pipeline 211 and the main pipeline 20.

[0068] During vacuum pumping, when the vacuum value in the chamber 1 is pumped to the second vacuum value, start the third pump body I 230 and the third pump body II 233, and cooperate with the first pump body 210 and the second pump body 22 to continue pumping vacuum for the chamber 1 until the vacuum value in the chamber 1 is pumped to the third vacuum value, so as to ensure that the vacuum value in the chamber 1 can meet the encapsulation requirements of the core material and improve the encapsulation effect of the core material, where the third vacuum value is less than the second vacuum value.

[0069] In this embodiment, the vacuum pumping assembly 2 further includes a fifth pump assembly 25. The fifth pump assembly 25 includes a fifth pump body 250, a fifth pipeline 251, and a fifth control valve 252. The fifth pump body 250 can be a secondary roughing pump. The fifth pipeline 251 connects the main pipeline 20 and the fifth pump body 250. The fifth control valve 252 is arranged on the fifth pipeline 251 to open and close the fifth pipeline 251. The fifth pipeline 251 can be connected to the end of the main pipeline 20. In this way, it can cooperate with the first pump body 210 to pump vacuum together, so that the vacuum value in the chamber 1 can quickly reach the first-stage vacuum value, improving the efficiency of vacuum pumping. Secondly, the fifth pump body 250 can also be opened independently.

[0070] A second aspect of the present utility model provides a vacuum packaging device for vacuum packaging a core material. The vacuum packaging device includes a packaging device (not shown in the figure) and the above-mentioned vacuum pumping device. The packaging device is arranged inside the chamber 1 and is used for packaging the core material. By providing the packaging device, the core material can be vacuum packaged, so that a vacuum is formed inside the vacuum insulation panel. In this way, the heat convection of air can be reduced, and the vacuum degree inside the packaged vacuum insulation panel can be maintained stably for a long time, with good stability.

[0071] In this embodiment, the packaging device is arranged in the chamber 1. The packaging device is a heat-sealing structure, including a first pressing member and a second pressing member. The first pressing member and the second pressing member are arranged opposite to each other and are respectively provided with a first pressing surface and a second pressing surface. Heating elements are arranged on the first pressing surface and the second pressing surface. When packaging, the barrier film loaded with the core material is placed between the first pressing surface and the second pressing surface, and the barrier film is heat-pressed by pressing the first pressing member and the second pressing member, so as to package the core material.

[0072] When pumping vacuum, open each pump body of the vacuum pumping assembly 2 and the corresponding control valve according to the vacuum degree requirement. At the same time, open the first switching valve 34, the second switching valve 35, and the blower. Use the electric heating wire to heat the air flowing into the blower, and introduce it into the chamber 1 through the first intake pipe 31, so as to directly introduce hot gas into the chamber 1. The gas temperature is maintained between 60°C and 80°C. After the gas is introduced into the chamber 1 and circulated for 20 min - 40 min, start each pump body to pump vacuum. While continuously introducing the hot gas, pump vacuum. After a certain period of time, stop introducing the gas and continue to pump vacuum. After meeting the vacuum requirement inside the core material, perform packaging.

[0073] The vacuum packaging equipment of this embodiment is provided with an air intake component 3 and a heating component 4. When vacuuming, the heating component 4 heats the gas introduced into the chamber 1. After the gas introduced into the chamber 1 undergoes a certain period of hot and cold cycles, the temperature of the chamber 1 rises accordingly, and the molecular thermal motion is accelerated. The chamber 1 is then vacuumed by the vacuuming component 2. At this time, the gas inside the core material is purged by the hot gas, which accelerates the escape rate of the gas molecules, so that the gas inside the core material is replaced by the hot gas, thereby making the gas inside the core material easier to be extracted, and finally the amount of gas remaining in the core material is less, thereby improving the vacuuming efficiency and vacuuming effect, reducing the initial thermal conductivity of the vacuum insulation panel, and improving the thermal insulation performance of the vacuum insulation panel.

[0074] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A vacuum pumping device, characterized in that: include: a chamber for placing the core material; A vacuum pumping component is connected to the chamber, and is used to vacuum the chamber; An air intake assembly, connected to the chamber, and used to introduce gas into the chamber; A heating component is connected to the air intake component, and the heating component is used to heat the gas flowing through the air intake component.

2. The vacuum pumping device according to claim 1, characterized in that: The air intake assembly includes an air blowing device and a first air intake pipe, the inlet end of the first air intake pipe is connected to the outlet end of the air blowing device, and the outlet end of the first air intake pipe is connected to the inlet end of the chamber.

3. The vacuum pumping device according to claim 2, characterized in that: The air intake assembly further includes an air storage device and a second air intake pipe, wherein the inlet end of the second air intake pipe is communicated with the outlet end of the air storage device, and the outlet end of the second air intake pipe is communicated with the inlet end of the air blowing device.

4. The vacuum pumping device according to claim 3, characterized in that: The gas storage device comprises at least one gas storage cylinder, and the gas storage cylinder is used to store gas.

5. The vacuum pumping device according to claim 3, characterized in that: The air intake assembly further includes a first switch valve, which is disposed on the first air intake pipe and can selectively open or close the first air intake pipe; And / or, the air intake component further includes a second switch valve, the second switch valve is disposed on the second air intake pipe, and the second switch valve can selectively open or close the second air intake pipe.

6. The vacuum extraction device according to any one of claims 2 to 5, characterized in that: The heating assembly comprises a heating element, and the heating element is arranged on the air outlet path of the air blowing device and / or located on the air suction path of the air blowing device.

7. The vacuum pumping device according to claim 6, characterized in that: The heating element comprises an electric heating wire.

8. The vacuum extraction device according to any one of claims 1 to 5, characterized in that: The vacuum assembly comprises: Main pipeline; A first pump assembly includes a first pump body, a first pipeline and a first control valve, wherein the first pipeline is connected to the first pump body and the main pipeline, the main pipeline is connected to the chamber, and the first control valve is arranged in the first pipeline to open and close the first pipeline; A second pump body, wherein the second pump body is arranged in a pipe section of the first pipeline between the first pump body and the first control valve.

9. The vacuum pumping device according to claim 8, characterized in that: The vacuum assembly also includes: at least one third pump assembly, the third pump assembly comprising a third pump body, a third pipeline and a third control valve, the third pipeline communicating with the main pipeline and the third pump body, the third control valve being arranged in the third pipeline to open and close the third pipeline; The fourth pump assembly includes a fourth pump body, a fourth pipeline and a fourth control valve. The fourth pipeline connects the first pipeline and the third pump body. The fourth control valve is arranged in the pipe section of the fourth pipeline between the first pipeline and the third pump body.

10. A vacuum packaging device for vacuum packaging a core material, characterized in that: The vacuum packaging equipment comprises a packaging device and a vacuum pumping device as claimed in any one of claims 1 to 9, wherein the packaging device is arranged inside the chamber and is used to package the core material.

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