A low-temperature vacuum-pumping device and method for a temperature-controlled vacuum cup

Abstract

The application relates to a low-temperature vacuumizing device and method for a vacuum cup with a temperature control component, wherein the device is provided with a vacuumizing box body; the vacuumizing box body is internally provided with a first heating module, a fixing tool for fixing and placing the vacuum cup with the temperature control component, and a second heating module for heating the sealing position of the bottom of the vacuum cup; the fixing tool comprises a support; the support is provided with a mounting station for fixing and placing the vacuum cup; the support is further provided with a temperature control plate; the temperature control plate is internally provided with a heat exchange channel for the flow of a heat exchange medium; the temperature control plate is provided with a penetrating hole through which the bottom of the vacuum cup can pass and form heat transfer contact with the vacuum cup; when the vacuum cup is placed on the mounting station, the temperature control component on the vacuum cup is not located between the bottom of the vacuum cup and the temperature control plate; and the temperature control device in communication with the heat exchange channel is further included. The application can meet the vacuumizing of the vacuum cup and effectively prevent the deformation and failure of the temperature control component on the vacuum cup.

Description

Technical Field

[0001] This invention relates to the field of vacuuming insulated cups, and particularly to a low-temperature vacuuming device and method for insulated cups with temperature control components. Background Technology

[0002] Conventional insulated containers (mainly thermos cups) are vacuumed using high-temperature exhaust, with heating temperatures exceeding 400℃. However, societal development has led to the use of insulated containers with different functions. Some equipment requires high vacuum but cannot withstand high-temperature heating, so low-temperature heating exhaust is used in conjunction with low-temperature activated getters to achieve a true high vacuum. However, this method is too costly and is mainly used for IC chip assembly and some laboratory equipment. Achieving high vacuum at low temperatures is not only time-consuming, but the cost of the low-temperature getter is also significantly higher than the non-evaporable getters currently used in thermos cups.

[0003] The main process for creating a vacuum in an insulated container or thermos is to first heat it at a high temperature to release the air. Once the heating and air release time is complete, the vacuum pressure reaches 10. -3 High-temperature activation of the getter can be achieved at the Pa level. Currently, the mainstream activation temperature for getters is 450℃±50℃, with an activation time of 30 minutes. Then, the temperature is further increased (normally above 500℃), and glass solder is used to melt and block the vent hole of the insulation container.

[0004] With increasing consumer demand, insulated cups with temperature-controlled components have emerged in the market. These temperature-controlled components deform as the temperature of the inner liner of the insulated cup rises, contacting the outer shell and forming a heat-conducting structure. The specific working process and principle can be found in patent number ZL2022224650637, entitled "A Temperature-Controlled Heat Conduction Structure and Insulated Container," which discloses the temperature-controlled component. However, when vacuuming these components using traditional methods, the high temperatures of traditional vacuuming methods (high-temperature exhaust) can easily deform the temperature-controlled component, leading to its failure. Therefore, there is an urgent need to design a vacuuming method that can prevent deformation of the temperature-controlled component. Summary of the Invention

[0005] The first objective of this invention is to provide a low-temperature vacuuming device for a thermos cup with a temperature control component. This device is for vacuuming at low temperatures (below 250°C) and can protect the temperature control component on the thermos cup while vacuuming it, effectively preventing deformation and failure of the temperature control component.

[0006] The technical solution to achieve the first objective of this invention is as follows: The low-temperature vacuuming device for a thermos cup with a temperature control component in this invention has a vacuuming chamber; the vacuuming chamber is provided with a vacuuming port connected to a vacuum pump group; the vacuuming chamber is provided with a first heating module for heating the internal temperature of the vacuuming chamber, a fixing fixture for fixing the thermos cup with the temperature control component, and a second heating module for heating the sealing position at the bottom of the thermos cup; the fixing fixture includes a bracket; the bracket is provided with at least one mounting position for fixing the thermos cup; the bracket is also provided with a temperature control plate; the temperature control plate is provided with a heat exchange channel for the heat exchange medium to flow through; the temperature control plate is provided with a through hole through which the bottom of the thermos cup can pass and form a heat transfer contact with the thermos cup; when the thermos cup is placed in the mounting position, the temperature control component on the thermos cup is not located between the bottom of the thermos cup and the temperature control plate.

[0007] It also includes a temperature control device for supplying heat exchange medium to the heat exchange channel.

[0008] Furthermore, the aforementioned bracket includes a base plate; the temperature control plate is fixedly connected to the base plate via a support plate; a placement auxiliary plate is provided at the lower end of each installation station on the base plate; the placement auxiliary plate includes a placement plate and a first spring; one end of the first spring is fixedly connected to the base plate, and the other end is fixedly connected to the bottom surface of the placement plate; a press-fit heating assembly is provided at the upper end of each installation station on the bracket; the press-fit heating assembly is located above the temperature control plate; the press-fit heating assembly includes a contact heating head that can move towards the base plate under the action of a second spring; the contact heating head is used to press the bottom of the thermos cup placed on the installation station and to heat the sealing position of the bottom of the thermos cup; the second heating module heats the contact heating head.

[0009] Furthermore, the aforementioned press-fit heating assembly includes a base plate, a second spring, a heat-conducting plate, and a contact heating head; the base plate is fixedly mounted on a bracket; a sliding guide post extending towards the base plate is fixedly mounted on the base plate; the heat-conducting plate is slidably mounted on the sliding guide post; the second spring is fitted onto the sliding guide post, and its two ends act on the base plate and the heat-conducting plate respectively; the end face of the heat-conducting plate facing the base plate is provided with a contact heating head corresponding to each installation station; the second heating module heats the heat-conducting plate and transfers heat to the contact heating head through the heat-conducting plate; under the action of the first spring and the second spring, the contact heating head cooperates with the placement auxiliary plate to clamp the thermos cup placed at the installation station.

[0010] Furthermore, the bracket has three installation stations; the heat-conducting plate has three contact heating heads.

[0011] Furthermore, the aforementioned second heating module is mounted on a heat-conducting plate; a temperature sensor is also provided on the heat-conducting plate.

[0012] Furthermore, the aforementioned vacuum chamber is equipped with a door for sealing the vacuum chamber, and a power signal line interface for supplying power and controlling the first heating module.

[0013] Furthermore, the vacuum chamber is also provided with a placement position for fixing the fixture; the fixture is detachably fixed in the placement position.

[0014] The second objective of this invention is to provide a low-temperature vacuuming method for a thermos cup with a temperature control component, which can effectively prevent the deformation and failure of the temperature control component on the thermos cup while satisfying the vacuuming requirement.

[0015] The technical solution to achieve the second objective of this invention is: the vacuuming method based on the above-mentioned low-temperature vacuuming device for a thermos cup with a temperature control component, comprising the following steps:

[0016] S1. Place the thermos cup with temperature control component to be vacuumed on the installation position of the fixed fixture.

[0017] S2, First stage of vacuuming: The first heating module is used to heat the entire interior of the vacuum chamber to 200-260℃; then the vacuum pump group is used to evacuate the interior of the vacuum chamber until the first stage of vacuuming is completed.

[0018] S3. Second Stage Vacuuming: The second heating module is activated, and the heating temperature is set at the activation temperature of the getter. At the same time, the temperature control device is activated to cause the heat exchange medium to circulate in the temperature control device and the heat exchange channel. The heat exchange efficiency of the temperature control plate is controlled by the temperature control device to keep the temperature control plate at the set temperature of the first heating module, so that the temperature of the thermos cup from the temperature control plate to the mouth of the cup does not exceed the set temperature of the first heating module. The second heating module heats up to the activation temperature of the getter and transfers the temperature to the sealing position at the bottom of the thermos cup through the contact heating head, and activates the getter at the sealing position until the second stage vacuuming is completed.

[0019] S4. After the activation time of the getter is reached, the second heating module continues to heat up to the melting and sealing temperature of the glass solder until the sealing of the glass solder is completed.

[0020] S5. After sealing, turn off the vacuum pump group and keep the vacuum chamber under high vacuum; at the same time, stop the operation of the first heating module and the second heating module; while the temperature control device continues to work until the temperature of the second heating module drops below the failure temperature of the temperature control component on the thermos cup before turning off the temperature control device.

[0021] S6. Cool down rapidly by natural cooling or by injecting protective gas into the vacuum chamber;

[0022] S7. After cooling is complete, open the vacuum chamber and take out the vacuum-sealed thermos.

[0023] The present invention has positive effects: (1) The present invention is a vacuuming device for low temperature (temperature below 250°C), which can protect the temperature control components on the thermos cup while satisfying the vacuuming of the thermos cup, and effectively prevent the deformation and failure of the temperature control components.

[0024] (2) The present invention can effectively clamp the thermos cup by placing an auxiliary plate in conjunction with the contact heating head, and it is also beneficial for the contact heating head to conduct heat to the sealing position of the thermos cup, which is beneficial for the second stage of vacuuming and sealing.

[0025] (3) In this invention, the press-fit heating component and the placement auxiliary plate can effectively clamp and fix the thermos cups of multiple workstations at one time.

[0026] (4) The present invention can effectively control the temperature of the temperature control plate through the temperature control device, thereby adapting to different temperature control requirements and meeting the vacuuming requirements of temperature control components with different upper temperature limits.

[0027] (5) The vacuuming method in this invention can effectively protect the temperature control component, so that it will not deform and fail during the vacuuming process, thereby improving the yield of thermos cups with temperature control components. Attached Figure Description

[0028] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the fixed tooling in this invention. Detailed Implementation

[0031] See Figure 1 and Figure 2The present invention relates to a low-temperature vacuuming device for a thermos cup with a temperature control component, comprising a vacuuming chamber 1; the vacuuming chamber 1 is provided with an air extraction port 11 connected to a vacuum pump assembly; the vacuuming chamber 1 is provided with a first heating module 2 for heating the internal temperature of the vacuuming chamber, a fixing fixture 4 for fixing the thermos cup 3 with the temperature control component, and a second heating module for heating the sealing position at the bottom of the thermos cup 3; the fixing fixture 4 includes a bracket; the bracket is provided with three fixing... An installation station for placing the thermos cup 3 is provided; the bracket is also equipped with a temperature control plate 41; the temperature control plate 41 has a heat exchange channel for the flow of heat exchange medium; the temperature control plate 41 has a through hole through which the bottom of the thermos cup 3 can pass and form heat transfer contact with the thermos cup 3; when the thermos cup 3 is placed in the installation station, the temperature control component on the thermos cup 3 is not located between the bottom of the thermos cup 3 and the temperature control plate 41; the temperature control plate 41 is made of a material with high thermal conductivity; it also includes a temperature control device 5 that circulates and provides heat exchange medium into the heat exchange channel.

[0032] The temperature control device 5 generally includes a heat exchange medium storage tank, which is located outside the vacuum chamber 1 and connected to the heat exchange channel after entering the vacuum chamber 1 through a connecting pipe. A pump for circulating the heat exchange medium is installed on the connecting pipe.

[0033] The bracket includes a base plate 42; the temperature control plate 41 is fixedly connected to the base plate 42 via a support plate 43; a placement auxiliary plate 44 is provided at the lower end of each installation station on the base plate 42; the placement auxiliary plate 44 includes a placement plate 441 and a first spring 442; one end of the first spring 441 is fixedly connected to the base plate 42, and the other end is fixedly connected to the bottom surface of the placement plate 441; a press-fit heating assembly 45 is provided at the upper end of each installation station on the bracket; the press-fit heating assembly 45 is located above the temperature control plate 41; the press-fit heating assembly 45 includes a base plate 451, a second spring 452, a heat-conducting plate 453, and a contact heating head 454; the base plate 451 is fixedly connected to the base plate 42 via a support plate 43; the support plate 42 includes a base plate 451, a second spring 452, a heat-conducting plate 453, and a contact heating head 454; the base plate 451 is fixedly connected to the base plate 42 via a support plate 43; the support plate 44 includes a base plate 451, a second spring 452, a heat-conducting plate 453, and a contact heating head 454; the base plate 451 is fixedly connected to the base plate 42 via a support plate 43; the support plate 44 includes a base plate 451, a second spring 452, a heat-conducting plate 453, and a contact heating head 454; the support ... The substrate 451 is fixedly mounted on the support; a sliding guide post extending towards the base plate 42 is fixedly mounted on the substrate 451; a heat-conducting plate 453 is slidably mounted on the sliding guide post; a second spring 452 is fitted on the sliding guide post, and its two ends act on the substrate 451 and the heat-conducting plate 453 respectively; three contact heating heads 454 corresponding to the installation positions are provided on the end face of the heat-conducting plate 453 facing the base plate 42; the second heating module heats the heat-conducting plate 453 and transfers heat to the contact heating heads 454 through the heat-conducting plate 453; under the action of the first spring 442 and the second spring 452, the contact heating heads 454 cooperate with the placement auxiliary plate 44 to clamp the thermos cup 3 placed at the installation position.

[0034] The contact heating head 454 is used to press down the bottom of the thermos cup 3 placed at the installation station, and to heat the sealing position at the bottom of the thermos cup 3.

[0035] The second heating module is mounted on the heat-conducting plate 453; the heat-conducting plate 453 is also equipped with a temperature sensor. The second heating module heats the heat-conducting plate 453, and the heat-conducting plate 453 transfers heat to the contact heating head 454.

[0036] The vacuum chamber 1 is provided with a door for sealing the vacuum chamber and a power signal line interface 12 for supplying power and controlling the first heating module 2.

[0037] The vacuum chamber 1 is also provided with a placement position for fixing the fixture 4; the fixture 4 is detachably fixed in the placement position.

[0038] The vacuuming method based on the above-mentioned low-temperature vacuuming device for a thermos cup with a temperature control component in this invention includes the following steps:

[0039] S1. Place the thermos cup 3 with temperature control components to be vacuumed on the installation position of the fixed fixture 4.

[0040] S2. First stage of vacuuming: The first heating module 2 is used to heat the entire interior of the vacuum chamber 1 to 200-260℃; then the vacuum pump group is used to evacuate the interior of the vacuum chamber 1 until the first stage of vacuuming is completed. This temperature does not exceed the deformation failure temperature of the temperature control component, but the hydrogen gas adsorbed by the stainless steel can be rapidly released at this temperature, which is beneficial to reduce the heating and exhaust time and can effectively protect the temperature control component.

[0041] S3. Second Stage Vacuuming: The second heating module is activated, and the heating temperature is set at the activation temperature of the getter. Simultaneously, the temperature control device 5 is activated, causing the heat exchange medium to circulate within the temperature control device 5 and the heat exchange channel. The temperature control device 5 controls the heat exchange efficiency of the temperature control plate 41, ensuring that the temperature control plate 41 maintains the set temperature of the first heating module 2, thus ensuring that the temperature of the thermos 3 from the temperature control plate 41 to the bottle opening does not exceed the set temperature of the first heating module 2. The second heating module heats up to the activation temperature of the getter, transferring the temperature to the sealing position at the bottom of the thermos 3 through the contact heating head 454, activating the getter at the sealing position until the second stage vacuuming is completed. The time required varies depending on the air pressure and the number of thermos 3s placed. A typical vacuum pressure of 10... -3 The order of magnitude of Pa is basically determined, and the exhaust is complete;

[0042] S4. After the activation time of the getter is reached, the second heating module continues to heat up to the melting and sealing temperature of the glass solder and maintains it for more than 10 minutes. Generally, the sealing of the glass solder can be completed.

[0043] S5. After sealing, turn off the vacuum pump group and keep the vacuum chamber 1 under high vacuum; at the same time, stop the operation of the first heating module 2 and the second heating module; while the temperature control device 5 continues to work until the temperature of the second heating module drops below the failure temperature of the temperature control component on the thermos cup 3 before turning off the temperature control device 5.

[0044] S6. Cool down rapidly by natural cooling or by injecting protective gas into the vacuum chamber 1;

[0045] S7. After cooling is complete, you can open the vacuum chamber 1 and take out the vacuum-sealed thermos 3.

[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-temperature vacuuming device for a thermos cup with a temperature control component, comprising a vacuuming chamber; wherein the vacuuming chamber is provided with an air extraction interface for connection to a vacuum pump assembly; characterized in that: The vacuum chamber is equipped with a first heating module for heating the internal temperature of the vacuum chamber, a fixture for fixing the thermos cup with temperature control components, and a second heating module for heating the sealed area at the bottom of the thermos cup. The fixture includes a bracket with at least one mounting position for fixing the thermos cup. The bracket also has a temperature control plate with a heat exchange channel for the heat exchange medium. The temperature control plate has a through hole through which the bottom of the thermos cup can pass and form heat transfer contact with the thermos cup. When the thermos cup is placed in the mounting position, the temperature control components on the thermos cup are not located between the bottom of the thermos cup and the temperature control plate. It also includes a temperature control device for supplying heat exchange medium circulating within the heat exchange channel; Vacuuming involves two stages: First stage of vacuuming: The first heating module is used to heat the entire interior of the vacuum chamber to 200-260℃; then the vacuum pump group is used to evacuate the interior of the vacuum chamber until the first stage of vacuuming is completed. The second stage of vacuuming involves activating the second heating module, setting the heating temperature to the getter's activation temperature, and simultaneously starting the temperature control device to circulate the heat exchange medium within the temperature control device and heat exchange channel. The temperature control device regulates the heat exchange efficiency of the temperature control plate, ensuring it maintains the set temperature of the first heating module, thus preventing the temperature of the thermos from the temperature control plate to the bottle opening from exceeding the set temperature of the first heating module. The second heating module heats up to the getter's activation temperature, transferring the temperature to the sealing position at the bottom of the thermos via the contact heating head, activating the getter at the sealing position, until the second stage of vacuuming is complete.

2. A low-temperature vacuum pumping device for a thermos cup with a temperature control component according to claim 1, characterized in that: The bracket includes a base plate; the temperature control plate is fixedly connected to the base plate via a support plate; a placement auxiliary plate is provided at the lower end of each installation station on the base plate; the placement auxiliary plate includes a placement plate and a first spring; one end of the first spring is fixedly connected to the base plate, and the other end is fixedly connected to the bottom surface of the placement plate; a press-fit heating assembly is provided at the upper end of each installation station on the bracket; the press-fit heating assembly is located above the temperature control plate; the press-fit heating assembly includes a contact heating head that can move towards the base plate under the action of a second spring; the contact heating head is used to press the bottom of the thermos cup placed on the installation station and to heat the sealing position of the bottom of the thermos cup; the second heating module heats the contact heating head.

3. A low-temperature vacuum pumping device for a thermos cup with a temperature control component according to claim 2, characterized in that: The press-fit heating assembly includes a base plate, a second spring, a heat-conducting plate, and contact heating heads. The base plate is fixedly mounted on a support. A sliding guide post extending towards the base plate is fixedly mounted on the base plate. The heat-conducting plate is slidably mounted on the sliding guide post. The second spring is fitted onto the sliding guide post, and its two ends act on the base plate and the heat-conducting plate, respectively. A contact heating head corresponding to each installation station is provided on the end face of the heat-conducting plate facing the base plate. The second heating module heats the heat-conducting plate and transfers heat to the contact heating heads through the heat-conducting plate. Under the action of the first spring and the second spring, the contact heating head cooperates with the placement auxiliary plate to clamp the thermos cup placed at the installation station.

4. A low-temperature vacuum pumping device for a thermos cup with a temperature control component according to claim 3, characterized in that: The bracket has three installation stations; the heat-conducting plate has three contact heating heads.

5. A low-temperature vacuum pumping device for a thermos cup with a temperature control component according to claim 3, characterized in that: The second heating module is mounted on a heat-conducting plate; a temperature sensor is also provided on the heat-conducting plate.

6. A low-temperature vacuum pumping device for a thermos cup with a temperature control component according to claim 1, characterized in that: The vacuum chamber is equipped with a door for sealing the vacuum chamber and a power signal line interface for supplying power and controlling the first heating module.

7. A low-temperature vacuum pumping device for a thermos cup with a temperature control component according to claim 6, characterized in that: The vacuum chamber is also provided with a placement position for fixing the fixture; the fixture is detachably fixed in the placement position.

8. A vacuuming method based on any one of claims 2 to 7 for a low-temperature vacuuming device for a thermos cup with a temperature control component, characterized in that... Includes the following steps: S1. Place the thermos cup with temperature control component to be vacuumed on the installation position of the fixed fixture. S2, First stage of vacuuming: The first heating module is used to heat the entire interior of the vacuum chamber to 200-260℃; then the vacuum pump group is used to evacuate the interior of the vacuum chamber until the first stage of vacuuming is completed. S3. Second Stage Vacuuming: The second heating module is activated, and the heating temperature is set at the activation temperature of the getter. At the same time, the temperature control device is activated to cause the heat exchange medium to circulate in the temperature control device and the heat exchange channel. The heat exchange efficiency of the temperature control plate is controlled by the temperature control device to keep the temperature control plate at the set temperature of the first heating module, so that the temperature of the thermos cup from the temperature control plate to the mouth of the cup does not exceed the set temperature of the first heating module. The second heating module heats up to the activation temperature of the getter and transfers the temperature to the sealing position at the bottom of the thermos cup through the contact heating head, and activates the getter at the sealing position until the second stage vacuuming is completed. S4. After the activation time of the getter is reached, the second heating module continues to heat up to the melting and sealing temperature of the glass solder until the sealing of the glass solder is completed. S5. After sealing, turn off the vacuum pump group and keep the vacuum chamber under high vacuum; at the same time, stop the operation of the first heating module and the second heating module; while the temperature control device continues to work until the temperature of the second heating module drops below the failure temperature of the temperature control component on the thermos cup before turning off the temperature control device. S6. Cool down rapidly by natural cooling or by injecting protective gas into the vacuum chamber; S7. After cooling is complete, open the vacuum chamber and take out the vacuum-sealed thermos.

Images