Vacuum insulation panel thermal conductivity testing device

Abstract

This application discloses a device for testing the thermal conductivity of a vacuum insulation panel. The device has a base plate and several side plates, which together with the base plate form a space with an open top. The top opening is used to place the vacuum insulation panel to be tested, and the tops of the side plates support the edges of the panel. During the thermal conductivity test, the vacuum insulation panel is placed at the top opening of the space, with the side plates supporting its edges. The test result is the overall thermal conductivity of the vacuum insulation panel, effectively evaluating its overall insulation performance. Furthermore, at least one side plate can move horizontally relative to the base plate, making the size of the space formed by the side plates and the base plate adjustable. This allows for testing the overall thermal conductivity of vacuum insulation panels of various sizes, and the device has a simple structure.

Description

Technical Field

[0001] This application relates to the technical field of vacuum insulation panel performance testing equipment, and in particular to a device for testing the thermal conductivity of vacuum insulation panels. Background Technology

[0002] Vacuum insulation panels (VIPs) are a type of vacuum insulation material composed of a core filler and a vacuum-protected surface layer. They effectively prevent heat transfer caused by air convection. While achieving the same insulation effect, VIPs are only one-tenth the thickness of traditional insulation materials, saving significant space and are widely used in refrigerators and freezers. Vacuum insulation panels are often used on the sides, back, and door areas of the freezer compartment in refrigerators. The thermal conductivity of the VIP is a key factor affecting the refrigerator's cold-keeping ability.

[0003] To ensure the pass rate of vacuum insulation panels, their thermal conductivity needs to be tested. In related technologies, the sample to be tested, i.e., the center of the vacuum insulation panel, is placed between two plates of a testing instrument. These plates are a hot plate and a cold plate, respectively. Heat is transferred from the hot plate through the vacuum insulation panel to the cold plate, and the thermal conductivity is calculated by measuring the heat flow. This method only tests the thermal conductivity of the center of the vacuum insulation panel to evaluate its insulation performance. However, the heat transfer performance at the edges of the vacuum insulation panel has a significant impact on its insulation performance. For general-purpose vacuum insulation panels, the overall insulation capacity can differ by more than 10% due to variations in thermal conductivity at the edges. Therefore, this method cannot effectively evaluate the insulation performance of vacuum insulation panels.

[0004] Therefore, there is a need for a thermal conductivity testing device that can effectively evaluate the overall thermal insulation performance of vacuum insulation panels. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a device for testing the thermal conductivity of a vacuum insulation panel.

[0006] In some embodiments of this application, the vacuum insulation panel thermal conductivity testing device includes a base, a temperature adjustment unit, and a temperature sensor. The base includes a base plate and several side plates, which are disposed on the base plate. At least one side plate can move horizontally relative to the base plate. The side plates and the base plate enclose a receiving space with a top opening. The top opening is used for placing the vacuum insulation panel to be tested, and the side plates support the edge of the vacuum insulation panel to be tested placed at the top opening. The temperature adjustment unit is disposed in the receiving space and is used to generate heat or cold. The temperature sensor is disposed in the receiving space and is used to sense the actual temperature in the receiving space.

[0007] Thus, in the above technical solution, the testing device has a base plate and several side plates. Each side plate and the base plate together form a space with an open top, where the vacuum insulation panel to be tested is placed. The tops of the side plates support the edges of the vacuum insulation panel. When testing the thermal conductivity of the vacuum insulation panel, the panel is placed at the open top of the space, with the side plates supporting its edges. The test result is the overall thermal conductivity of the vacuum insulation panel, effectively evaluating its overall insulation performance. Furthermore, at least one side plate can move horizontally relative to the base plate, making the size of the space formed by the side plates and the base plate adjustable. This allows for testing the overall thermal conductivity of vacuum insulation panels of various sizes, and the testing device has a simple structure.

[0008] In some embodiments of this application, at least one side plate can move relative to the base plate in a first direction and a second direction, wherein the first direction is perpendicular to the second direction.

[0009] In the above technical solution, the side plate can be adjusted in the first and second directions, thereby adjusting the size of the accommodating space formed by the side plate and the bottom plate in both length and width directions, which is suitable for testing the overall thermal conductivity of vacuum insulation panels of different lengths and widths.

[0010] In some embodiments of this application, the plurality of side plates include four side plates, which together with the bottom plate form a rectangular accommodating space with an opening at the top. The four side plates can move on the bottom plate relative to the bottom plate in a first direction and a second direction.

[0011] In the above technical solution, all four side plates can move relative to the base plate in the first and second directions, so as to flexibly adjust the size of the accommodating space formed by the side plates and the base plate.

[0012] In some embodiments of this application, at least one side plate is provided with a slide groove that extends along a first direction; the testing device also includes a drive mechanism, which includes a drive motor, a lead screw, and a connector. The drive motor is installed at the edge of the base plate, the lead screw extends along a second direction, one end of the lead screw is connected to the output end of the drive motor through the connector, and the other end of the lead screw is installed in the slide groove through a fixing member, and the lead screw is able to move in the slide groove.

[0013] In the above technical solution, a sliding groove extending along a first direction is provided on the side plate. A lead screw is installed in the sliding groove by a fixing member, and the lead screw can move along the sliding groove. When it is necessary for the side plate to move relative to the bottom plate in the first direction, the side plate is pushed along the first direction. The lead screw extends along a second direction and is connected to the output end of a drive motor. When it is necessary for the side plate to move relative to the bottom plate in the second direction, the drive motor is started to drive the lead screw to move in the second direction, thus moving the side plate in the second direction.

[0014] In some embodiments of this application, the temperature regulating unit includes a resistive heater and / or a semiconductor cooling chip.

[0015] In the above technical solution, the temperature regulation unit has a simple structure and occupies a small volume.

[0016] In some embodiments of this application, the base plate and side plate have a temperature control layer and a heat insulation layer. The temperature control layer is disposed on the outside of the heat insulation layer and is used to generate heat or cold to control the temperature of the base plate and side plate.

[0017] In the above technical solution, the inner insulation layer prevents the cold or heat in the containment space from diffusing to the outside, and the outer temperature control layer controls the outer temperature of the bottom plate and side plate. When testing the thermal conductivity of the vacuum insulation board, the temperature of the bottom plate and side plate can be controlled by the temperature control layer to the same target temperature as the internal temperature of the containment space. This is equivalent to the bottom plate and side plate not exchanging heat with the outside, and only the vacuum insulation board exchanging heat with the outside, which can improve the accuracy of the thermal conductivity test results.

[0018] In some embodiments of this application, the temperature control layer includes a resistive heater and / or a semiconductor refrigeration chip.

[0019] In the above technical solution, the temperature control layer has a simple structure and occupies a small volume.

[0020] In some embodiments of this application, the testing device includes a metering unit connected to a temperature control unit for obtaining the heating or cooling capacity of the temperature control unit.

[0021] In the above technical solution, by integrating a metering unit into the testing device, it is convenient to obtain the heating or cooling capacity of the temperature regulation unit, so as to further calculate the thermal conductivity of the vacuum insulation board.

[0022] In some embodiments of this application, the testing device includes a controller disposed outside the base and electrically connected to a temperature regulating unit, a temperature sensor, and a metering unit. The controller is configured to control the start and stop of the temperature control unit based on the actual temperature collected by the temperature sensor, and to determine the thermal conductivity of the vacuum insulation board based on the information collected by the metering unit.

[0023] In the above technical solution, the thermal conductivity of the vacuum insulation board is automatically calculated through a controller.

[0024] In some embodiments of this application, the testing apparatus includes an air circulation unit disposed in the accommodating space for uniformly distributing the temperature within the accommodating space.

[0025] In the above technical solution, by setting up an air circulation unit, the temperature in the containment space becomes more uniform, which helps to improve the accuracy of the thermal conductivity test results of the vacuum insulation board.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0028] Figure 1 A top view of a vacuum insulation panel thermal conductivity testing apparatus according to an embodiment of this application is shown.

[0029] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the base of the test device shown.

[0030] Figure 3 A schematic diagram of a vacuum insulation panel according to an embodiment of this application is shown when it is placed on a testing device.

[0031] Figure 4 It shows Figure 1 The diagram shows the structural composition of the base plate.

[0032] Figure 5 It shows Figure 1 The diagram shows the structural composition of the side panel.

[0033] Figure 6 A schematic diagram showing the connection between the drive mechanism and the side plate according to an embodiment of this application is shown.

[0034] Figure 7 A front view of a side panel according to one embodiment of this application is shown.

[0035] Figure 8 A schematic diagram of the accommodating space according to an embodiment of this application is shown.

[0036] Figure 9 A schematic diagram of the accommodating space according to another embodiment of this application is shown.

[0037] Figure 10 A block diagram of the electrical control components of a test apparatus according to an embodiment of this application is shown.

[0038] Figure 11 A test flowchart of a test apparatus according to an embodiment of this application is shown.

[0039] The annotations in the attached figures are explained as follows:

[0040] 100. Testing device; 1. Base; 11. Base plate; 111. Temperature control layer; 112. Insulation layer; 113. Protective layer; 12. Side plate; 121. Temperature control layer; 122. Insulation layer; 123. Protective layer; 124. Slide groove; 12a. First side plate; 12b. Second side plate; 12c. Third side plate; 12d. Fourth side plate; 13. Accommodation space; 21. Drive motor; 22. Lead screw; 23. Connector; 24. Fixing component; 25. Fixing plate; 3. Temperature adjustment unit; 4. Temperature sensor; 5. Measuring unit; 6. Controller; 7. Air circulation unit; 200. Vacuum insulation panel. Detailed Implementation

[0041] To make the objectives, implementation methods, and advantages of this application clearer, exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0043] Furthermore, the terms “including” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0044] In the description of this application, it should be understood that the terms "top", "bottom", "inner", "outer", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] The terms "first," "second," and other ordinal numbers are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified with ordinal numbers such as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0046] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] The testing instruments used in related technologies cannot effectively evaluate the thermal insulation performance of vacuum insulation panels. This is because, during testing, the center of the vacuum insulation panel is placed between two plates of the testing instrument, which are a hot plate and a cold plate, respectively. Heat is transferred from the hot plate to the cold plate through the vacuum insulation panel, and the thermal conductivity is calculated by measuring the heat flow. However, the heat transfer performance at the edges of the vacuum insulation panel is not considered, even though it has a significant impact on the thermal insulation performance of the panel.

[0048] In view of this, this application provides a novel testing device. The device has a base plate and several side plates, each side plate forming a accommodating space with an open top. The top opening of the accommodating space is used to place the vacuum insulation panel to be tested, and the tops of the side plates support the edges of the vacuum insulation panel. When testing the thermal conductivity of the vacuum insulation panel, the panel is placed at the top opening of the accommodating space, with the side plates supporting the edges. The obtained test result is the overall thermal conductivity, taking into account the heat transfer performance at the edges of the vacuum insulation panel, thus effectively evaluating its overall insulation performance. Furthermore, at least one side plate is configured to move horizontally relative to the base plate, making the size of the accommodating space formed by the side plates and the base plate adjustable. This allows for testing the overall thermal conductivity of vacuum insulation panels of various sizes, and the testing device has a simple structure.

[0049] Figure 1 A top view of a vacuum insulation panel thermal conductivity testing apparatus according to an embodiment of this application is shown. Figure 2 It shows Figure 1 A three-dimensional structural diagram of the base of the test device shown. Figure 3 A schematic diagram of a vacuum insulation panel according to an embodiment of this application is shown when it is placed on a testing device.

[0050] like Figure 1 and Figure 2 As shown, the vacuum insulation panel thermal conductivity testing device 100 of this application embodiment includes a base 1, the base 1 includes a bottom plate 11 and a side plate 12, the side plate 12 is vertically arranged on the bottom plate 11, and the side plate 12 and the bottom plate 11 enclose a receiving space 13 with an opening at the top.

[0051] In some embodiments, the base plate 11 is rectangular, and the side plates 12 are also rectangular. There are four side plates 12, and the four side plates 12 and the base plate 11 enclose a rectangular accommodating space 13 with an open top, which is suitable for testing the thermal conductivity of the rectangular vacuum insulation panel.

[0052] Of course, the base plate 11 and the side plate 12 are not limited to being rectangular, and the accommodating space 13 formed by the side plate 12 and the base plate 11 is not limited to being rectangular. The shape of the base plate 11, the side plate 12, and the accommodating space 13 formed by the side plate 12 and the base plate 11 can be designed according to the shape of the vacuum insulation panel to be tested, and this application does not impose any restrictions on this. Similarly, the number of side plates 12 is not limited to four, as long as they can be enclosed with the base plate 11 to form an accommodating space that matches the shape and size of the vacuum insulation panel to be tested.

[0053] The top opening of the accommodating space 13 is used to place the vacuum insulation panel to be tested. When the vacuum insulation panel 200 is placed in the top opening of the accommodating space 13, each side plate 12 supports the edge of the vacuum insulation panel 200 placed in the top opening, such as... Figure 3 As shown. That is, the length and width of the top opening of the accommodating space 13 formed by the side plate 12 and the bottom plate 11 are the same as the length and width of the vacuum insulation panel 200. When the vacuum insulation panel 200 is placed at the top opening of the accommodating space 13 formed by the side plate 12 and the bottom plate 11, the edge of the vacuum insulation panel 200 exactly covers each side plate 12, sealing the top opening of the accommodating space 13. Therefore, it can not only prevent cold or heat from diffusing from the top opening of the accommodating space 13 during the test, but also enable the vacuum insulation panel 200 as a whole to exchange heat with the outside, realizing the overall thermal insulation performance evaluation of the vacuum insulation panel 200.

[0054] Figure 4 It shows Figure 1 The diagram shows the structural composition of the base plate.

[0055] like Figure 4 As shown, the base plate 11 has a multi-layer structure, including a temperature control layer 111 and a heat insulation layer 112.

[0056] The inner layer of the base plate 11 is an insulation layer 112, which is used to prevent the cold or heat in the accommodating space 13 from spreading to the outside.

[0057] The insulation layer 112 can be made of inorganic materials, such as rock wool, glass wool, aerogel, etc., or organic materials, such as polystyrene board (EPS / XPS), polyurethane foam, phenolic resin, etc., or vacuum insulation board. The insulation layer 112 can have a multi-layer structure, with each layer having a different insulation material. For example, the insulation layer 112 includes a first layer and a second layer, where the first layer is an inorganic fiberboard and the second layer is a polystyrene board. Alternatively, the insulation layer 112 can include a first layer, a second layer, and a third layer, where the first layer is an inorganic fiberboard, the second layer is a polystyrene board, and the third layer is an inorganic fiberboard.

[0058] When the insulation layer 112 has a multi-layer structure, the layers can be fixed together by means of bonding or other methods. This application does not limit the specific structural composition of the insulation layer 112.

[0059] The outer layer of the base plate 11 is a temperature control layer 111, that is, the temperature control layer 111 is located on the outside of the insulation layer 112, and the temperature control layer 111 is used to set the temperature on the outside of the base plate 11.

[0060] Specifically, the temperature control layer 111 is used to generate heat or cold to control the temperature on the outside of the base plate 11.

[0061] In some embodiments, the temperature control layer 111 includes a heating unit for generating heat to control the temperature of the outer side of the base plate 11. Exemplarily, the heating unit is a resistance heater, such as a heating wire. By controlling the heating wire to start or stop heating, the temperature of the outer side of the base plate 11 is controlled to a target temperature. The heating wire can be distributed in a mesh pattern to uniformly distribute heat in the temperature control layer 111; of course, the heating wire can also have other distribution shapes.

[0062] In some embodiments, the temperature control layer 111 includes a cooling unit for generating cooling energy to control the temperature of the outer side of the base plate 11. Exemplarily, the cooling unit is a thermoelectric cooler, and the temperature of the outer side of the base plate 11 is controlled to a target temperature by controlling the thermoelectric cooler to start or stop cooling.

[0063] Understandably, the temperature control layer 111 can also include a heating unit and a cooling unit. During thermal conductivity testing, one of the heating unit and the cooling unit can be selectively activated according to specific testing requirements. The heating unit and the cooling unit can also be integrated into a single unit. For example, the temperature control layer 111 includes a thermoelectric cooler. By controlling the current direction of the thermoelectric cooler to switch between cooling and heating modes, the thermoelectric cooler can be selectively controlled to cool or heat according to specific testing requirements, thereby controlling the temperature on the outside of the base plate 11 to the target temperature.

[0064] The temperature control layer 111 and the insulation layer 112 can be fixed together by means of adhesive bonding or other methods. Furthermore, the base plate 11 may also include a protective layer 113, which wraps around the structure formed by the temperature control layer 111 and the insulation layer 112, such as... Figure 4 As shown.

[0065] Figure 5 It shows Figure 1 The diagram shows the structural composition of the side panel.

[0066] like Figure 5 As shown, the side panel 12 has a multi-layer structure, including a temperature control layer 121 and a heat insulation layer 122.

[0067] The inner layer of the side panel 12 is an insulation layer 122, which is used to prevent the cold or heat in the accommodating space 13 from spreading to the outside.

[0068] The insulation layer 122 can be made of inorganic materials, such as rock wool, glass wool, aerogel, etc., or organic materials, such as polystyrene board (EPS / XPS), polyurethane foam, phenolic resin, etc., or vacuum insulation board. The insulation layer 122 can have a multi-layer structure, with each layer containing a different insulation material. For example, the insulation layer 122 includes a first layer and a second layer, where the first layer is an inorganic fiberboard and the second layer is a polystyrene board. Alternatively, the insulation layer 122 can include a first layer, a second layer, and a third layer, where the first layer is an inorganic fiberboard, the second layer is a polystyrene board, and the third layer is an inorganic fiberboard.

[0069] When the insulation layer 122 has a multi-layer structure, the layers can be fixed together by means of bonding or other methods. This application does not limit the specific structural composition of the insulation layer 122.

[0070] The outer layer of the side panel 12 is a temperature control layer 121, that is, the temperature control layer 121 is located on the outside of the insulation layer 122, and the temperature control layer 121 is used to set the temperature on the outside of the side panel 12.

[0071] Specifically, the temperature control layer 121 is used to generate heat or cold to control the temperature on the outside of the side panel 12.

[0072] In some embodiments, the temperature control layer 121 includes a heating unit for generating heat to control the temperature of the outer side of the side panel 12. Exemplarily, the heating unit is a resistance heater, such as a heating wire, and the temperature of the outer side of the side panel 12 is controlled to a target temperature by controlling the heating wire to start or stop heating. The heating wire can be distributed in a mesh pattern to uniformly distribute heat in the temperature control layer 121; of course, the heating wire can also have other distribution shapes.

[0073] In some embodiments, the temperature control layer 121 includes a cooling unit for generating cooling to control the temperature of the outer side of the side panel 12. Exemplarily, the cooling unit is a thermoelectric cooler, and the temperature of the outer side of the side panel 12 is controlled to a target temperature by controlling the thermoelectric cooler to start or stop cooling.

[0074] Understandably, the temperature control layer 121 can also include a heating unit and a cooling unit. During thermal conductivity testing, one of the heating unit and the cooling unit can be selectively activated according to specific testing requirements. The heating unit and the cooling unit can also be integrated into a single unit. For example, the temperature control layer 121 includes a thermoelectric cooler. By controlling the current direction of the thermoelectric cooler to switch between cooling and heating modes, the thermoelectric cooler can be selectively controlled to cool or heat according to specific testing requirements, thereby controlling the temperature on the outside of the side plate 12 to the target temperature.

[0075] The temperature control layer 121 and the insulation layer 122 can be fixed together by means of adhesive bonding or other methods. Furthermore, the side panel 12 may also include a protective layer 123, which wraps around the structure formed by the temperature control layer 121 and the insulation layer 122, such as... Figure 5 As shown.

[0076] In some embodiments, at least one side plate 12 can be horizontally moved relative to the base plate 11. By moving the side plate 12 horizontally relative to the base plate 11, the size of the accommodating space 13 formed by the side plate 12 and the base plate 11 can be adjusted, thereby adapting to the overall thermal conductivity testing of vacuum insulation panels of various sizes.

[0077] The side plate 12 moves horizontally relative to the base plate 11, and can move in multiple directions. In some embodiments, the side plate 12 can move relative to the base plate 11 in a first direction and a second direction, wherein the first direction is perpendicular to the second direction. This allows the side plate 12 to be adjusted in both the first and second directions, thereby adjusting the dimensions of the accommodating space 13 formed by the side plate 12 and the base plate 11 in both length and width directions, adapting to the overall thermal conductivity testing of vacuum insulation panels of different lengths and widths.

[0078] by Figure 1 Taking the angle shown as an example, the first direction is the front-back direction, and the second direction is the left-right direction.

[0079] Figure 6 This invention provides a schematic diagram showing the connection between the drive mechanism and the side plate according to one embodiment of the present application. Figure 7 A front view of a side panel according to one embodiment of this application is shown.

[0080] like Figure 6 and Figure 7As shown, the testing device 100 also includes a drive mechanism, which includes a drive motor 21, a lead screw 22, and a connector 23. The drive motor 21 is mounted on the edge of the base plate 11. The lead screw 22 extends along a second direction, and one end of the lead screw 22 is connected to the output end of the drive motor 21 via the connector 23. A slide groove 124 is provided on the side plate 12, extending along a first direction. The other end of the lead screw 22 is mounted in the slide groove 124 via a fixing member 24.

[0081] A slide groove 124 extending in a first direction is provided on the side plate 12. A lead screw 22 is installed in the slide groove 124 by a fixing member 24, and the lead screw 22 can move along the slide groove 124. When it is necessary to move the side plate 12 relative to the bottom plate 11 in the first direction, the side plate 12 is pushed in the first direction. The lead screw 22 extends in a second direction and is connected to the output end of the drive motor 21. When it is necessary to move the side plate 12 relative to the bottom plate 11 in the second direction, the drive motor 21 is started to drive the lead screw 22 to move in the second direction, thereby causing the side plate 12 to move in the second direction.

[0082] In some embodiments, the fixing member 24 is a fixing nut located within the slide groove 124. By enabling the fixing nut to move in the first direction, the side plate 12 can move in the first direction. The connecting member 23 is a rotating nut, and the drive motor 21 drives the rotating nut to rotate, thereby driving the lead screw 22 to move in the second direction. A fixing plate 25 is provided at the edge of the base plate 11, and the drive motor 21 is mounted on the outside of the fixing plate 25. One end of the lead screw 22 passes through the fixing plate 25 and is mounted to the slide groove 124. The drive motor 21 can be a stepper motor.

[0083] Figure 6 and Figure 7 In the illustrated embodiment, the side plate 12 moves in the first direction by providing a sliding groove 124 extending in the first direction on the side plate 12. The movement of the side plate 12 in the second direction is achieved through the cooperation of the drive motor 21, the lead screw 22, and the connecting member 23. This structure is simple and low-cost. Of course, in other embodiments, the movement of the side plate 12 in the first and second directions can also be achieved through other structures. For example, a second drive mechanism can be provided to achieve the movement of the side plate 12 in the first direction. Another example is a cylinder mechanism, where the movement of the side plate 12 in the first and / or second directions is achieved through the extension and retraction of the cylinder.

[0084] To facilitate the movement of the side plate 12, in some embodiments, a sliding groove extending along a first direction and a second direction may be provided on the base plate 11, and the side plate 12 may be positioned at the location of the sliding groove. Further details will not be provided here.

[0085] In some embodiments, all four side plates 12 can move relative to the base plate 11 in a first direction and a second direction to flexibly adjust the size of the accommodating space 13 formed by the side plates 12 and the base plate 11.

[0086] Figure 8 A schematic diagram of the accommodating space according to an embodiment of this application is shown. Figure 9 A schematic diagram of the accommodating space according to another embodiment of this application is shown.

[0087] When the accommodating space 13 needs to be changed from a small size to a large size, in order to facilitate the description of the movement process of each side plate, the four side plates are named the first side plate 12a, the second side plate 12b, the third side plate 12c, and the fourth side plate 12d, respectively.

[0088] for Figure 8 When the small-sized accommodating space 13 shown needs to be enlarged, in one embodiment, the first side plate 12a is first moved to the left, then the second side plate 12b is moved to the left and backward, then the third side plate 12c is moved to the right and backward, and finally the fourth side plate 12d is moved to the right, thus forming... Figure 9 The large-size accommodating space 13 shown is adaptable to the testing requirements of vacuum insulation panels of different sizes, depending on the different moving distances and directions of each side plate.

[0089] It should be noted that the fact that all four side plates 12 can move relative to the base plate 11 in the first and second directions is only one embodiment of this application. In other embodiments, only some of the side plates 12 can move relative to the base plate 11 in the first and second directions, or some of the side plates 12 can move relative to the base plate 11 in the first direction, while others can move relative to the base plate 11 in the second direction. The goal is simply to create an accommodating space 13 that is compatible with the dimensions of the vacuum insulation panel.

[0090] Figure 10 A block diagram of the electrical control components of a test apparatus according to an embodiment of this application is shown.

[0091] like Figure 1 and Figure 10 As shown, the vacuum insulation panel thermal conductivity testing device 100 of this application embodiment also includes a temperature adjustment unit 3, which is disposed in the accommodating space 13 and is used to generate heat or cold.

[0092] In some embodiments, the temperature regulating unit 3 is a heating unit used to generate heat to control the temperature inside the accommodating space 13. Exemplarily, the temperature regulating unit 3 is a resistance heater, such as a heating wire, which controls the heating wire to start or stop heating to control the temperature inside the accommodating space 13 to the target temperature.

[0093] In some embodiments, the temperature regulating unit 3 is a cooling unit used to generate cooling capacity to control the temperature inside the accommodating space 13. Exemplarily, the temperature regulating unit 3 is a thermoelectric cooler, which controls the thermoelectric cooler to start or stop cooling to control the temperature inside the accommodating space 13 to the target temperature.

[0094] Understandably, the temperature control unit 3 can also include a heating unit and a cooling unit. When conducting thermal conductivity tests, one of the heating unit and the cooling unit can be selectively activated according to specific test requirements. The heating unit and the cooling unit can also be integrated into a single unit. For example, the temperature control unit 3 can be a thermoelectric cooler. By controlling the current direction of the thermoelectric cooler to switch between cooling and heating modes, the thermoelectric cooler can be selectively controlled to cool or heat according to specific test requirements, thereby controlling the temperature inside the accommodating space 13 to the target temperature.

[0095] In some embodiments, the temperature regulating unit 3 is disposed in the middle of the accommodating space 13 by means of a mounting bracket (not shown in the figure).

[0096] The vacuum insulation panel thermal conductivity testing device 100 of this application embodiment also includes a temperature sensor 4, which is disposed in the accommodating space 13 and is used to sense the actual temperature in the accommodating space 13.

[0097] The vacuum insulation panel thermal conductivity testing device 100 of this application embodiment further includes a metering unit 5, which is connected to a temperature regulating unit 3 and is used to obtain the heating or cooling capacity of the temperature regulating unit 3.

[0098] Metering unit 5 can be an electric power meter. Metering unit 5 measures the electrical energy consumed by temperature control unit 3. Based on the conversion relationship, the consumed electrical energy can be converted into the heating or cooling capacity of temperature control unit 3.

[0099] By integrating the metering unit 5 into the testing device 100, the heating or cooling capacity of the temperature control unit 3 can be easily obtained, facilitating the further calculation of the thermal conductivity of the vacuum insulation panel. Alternatively, the testing device 100 may not integrate the metering unit 3; in this case, an external metering unit can be connected when testing the thermal conductivity of the vacuum insulation panel using the testing device 100.

[0100] The vacuum insulation panel thermal conductivity testing device 100 of this application embodiment further includes a controller 6, which is disposed outside the base 1. The controller 6 is electrically connected to the temperature regulating unit 3, the temperature sensor 4, the metering unit 5, and the heating / cooling unit in the temperature control layer 111 / 121. The controller 6 is configured to control the start and stop of the temperature regulating unit 3 and the heating / cooling unit in the temperature control layer 111 / 121 according to the actual temperature collected by the temperature sensor 4, and to determine the thermal conductivity of the vacuum insulation panel according to the measurement results of the metering unit 4.

[0101] Specifically, controller 6 can be based on relational... Determine the thermal conductivity of the vacuum insulation panel, where K represents the thermal conductivity of the vacuum insulation panel, Q represents the heating or cooling capacity of the temperature regulation unit 3, L represents the thickness of the vacuum insulation panel, A represents the area of ​​the vacuum insulation panel, and ΔT represents the temperature difference between the inner and outer sides of the vacuum insulation panel.

[0102] Controller 6 can be a microcontroller unit (MCU), but it can also be other types of controllers.

[0103] In some embodiments, the testing apparatus 100 further includes an air circulation unit 7 disposed in the accommodating space 13 for uniformly distributing the temperature in the accommodating space 13.

[0104] By setting up the air circulation unit 7, the temperature in the accommodating space 13 becomes more uniform, which helps to improve the accuracy of the thermal conductivity test results of the vacuum insulation panel.

[0105] In some embodiments, the air circulation unit 7 is a fan. That is, the fan blows the cold / heat generated by the temperature regulation unit 3 into the entire accommodating space 13, making the temperature inside the accommodating space 13 more uniform. Of course, the air circulation unit 7 can also be other devices.

[0106] In some embodiments, the testing device 100 further includes a display unit (not shown in the figure), which can be electrically connected to the controller 6 to display temperature information detected by the temperature sensor 4, thermal conductivity calculated by the controller 6, etc.

[0107] Figure 11 A test flowchart of a test apparatus according to an embodiment of this application is shown.

[0108] like Figure 11 As shown, when testing the thermal conductivity of a vacuum insulation board using the testing apparatus 100 of this application, the following steps S1110-S1140 are included, which are described in detail below:

[0109] In step S1110, the side plate 12 is moved relative to the bottom plate 11 on a horizontal plane, forming an accommodating space 13 that matches the size of the vacuum insulation panel to be tested, such as... Figure 2 As shown. Then, proceed to step S1120.

[0110] That is, in step S1110, by moving the side plate 12 relative to the bottom plate 11 on the horizontal plane, the length and width of the accommodating space 13 enclosed by the bottom plate 11 are the same as the length and width of the vacuum insulation plate to be tested.

[0111] In step S1120, the vacuum insulation panel to be tested is placed at the opening of the accommodating space 13, that is, at the top position of the side panel 12, so that the vacuum insulation panel to be tested, the four side panels 12, and the bottom plate 11 enclose a closed space. Figure 3 As shown. Then, proceed to step S1130.

[0112] In step S1130, controller 6 activates temperature regulation unit 3 to bring the internal temperature of accommodating space 13 to the target temperature, and activates heating / cooling units in temperature control layers 111 / 121 to bring the bottom plate 11 and side plate 12 to the same target temperature, while simultaneously activating air circulation unit 7. Then, proceed to step S1140.

[0113] At this time, since the temperature of the base plate 11 and the side plate 12 reaches the same target temperature as the internal temperature of the accommodating space 13, the inner and outer wall temperatures of the base plate 11 and the side plate 12 are the same, and there is no temperature difference. This is equivalent to the base plate 11 and the side plate 12 not exchanging heat with the outside, and only the vacuum insulation plate under test exchanging heat with the outside, which can improve the accuracy of the thermal conductivity test results.

[0114] In one embodiment, the thermal conductivity of the vacuum insulation board is tested by heating through the temperature adjustment unit 3. The target temperature is set to 70°C, and the external ambient temperature of the test device 100 is set to a stable temperature. For example, the external ambient temperature of the test device 100 is 20°C. At this time, the temperature difference between the inside of the accommodating space 13 and the external ambient temperature is 50°C.

[0115] Of course, the thermal conductivity of the vacuum insulation board can also be tested by cooling through the temperature regulation unit 3. The target temperature is set to 5°C, and the external ambient temperature of the test device 100 is set to a stable temperature. For example, the external ambient temperature of the test device 100 is 20°C. At this time, the temperature difference between the inside of the accommodating space 13 and the external ambient temperature is 15°C.

[0116] In step S1140, the controller 6 receives the power consumption collected by the metering unit 5, and can convert the power consumption into the heating or cooling capacity of the temperature regulating unit 3 based on the conversion relationship, and then converts it into the heating or cooling capacity of the temperature regulating unit 3 based on the relationship. Determine the thermal conductivity of the vacuum insulation panel.

[0117] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of this application is limited only by the appended claims.

Claims

1. A vacuum insulation panel thermal conductivity testing device, characterized by, The testing apparatus includes: The base includes a base plate and several side plates. The side plates are disposed on the base plate. At least one of the side plates can move horizontally relative to the base plate. The side plates and the base plate enclose a receiving space with a top opening. The top opening is used for placing a vacuum insulation panel to be tested. The side plates support the edge of the vacuum insulation panel to be tested placed at the top opening. A temperature control unit is disposed in the accommodating space and is used to generate heat or cold. A temperature sensor is disposed in the accommodating space to sense the actual temperature in the accommodating space.

2. The testing apparatus according to claim 1, characterized in that, At least one of the side plates is movable relative to the base plate in a first direction and a second direction, wherein the first direction is perpendicular to the second direction.

3. The testing apparatus according to claim 2, characterized in that, The plurality of side plates includes four side plates, which together with the bottom plate form a rectangular accommodating space with an open top. The four side plates can move on the bottom plate relative to the bottom plate in the first direction and the second direction.

4. The testing apparatus according to claim 2, characterized in that, At least one of the side plates is provided with a sliding groove, the sliding groove extending along the first direction; The testing device further includes a drive mechanism, which includes a drive motor, a lead screw, and a connector. The drive motor is installed at the edge of the base plate, the lead screw extends along the second direction, one end of the lead screw is connected to the output end of the drive motor through the connector, and the other end of the lead screw is installed in the slide groove through a fixing member, and the lead screw is able to move in the slide groove.

5. The testing apparatus according to claim 1, characterized in that, The temperature control unit includes a resistive heater and / or a semiconductor cooling chip.

6. The testing apparatus according to claim 1, characterized in that, The base plate and the side plate have a temperature control layer and a heat insulation layer. The temperature control layer is disposed on the outside of the heat insulation layer. The temperature control layer is used to generate heat or cold to control the temperature of the base plate and the side plate.

7. The testing apparatus according to claim 6 is characterized in that... The temperature control layer includes a resistive heater and / or a semiconductor cooling chip.

8. The testing apparatus according to any one of claims 1 to 7, characterized in that, The testing apparatus includes: A metering unit, connected to the temperature control unit, is used to obtain the heating or cooling capacity of the temperature control unit.

9. The testing apparatus according to claim 8, characterized in that, The testing apparatus includes: The controller, located outside the base, is electrically connected to the temperature regulating unit, the temperature sensor, and the metering unit. It is configured to control the start and stop of the temperature control unit based on the actual temperature collected by the temperature sensor, and to determine the thermal conductivity of the vacuum insulation panel based on the information collected by the metering unit.

10. The testing apparatus according to any one of claims 1 to 7, characterized in that, The testing apparatus includes: An air circulation unit is provided in the accommodating space to uniformly distribute the temperature within the accommodating space.

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