Sample cell for large-sample three-dimensional calorimeter

Abstract

The utility model relates to a sample cell for a large-sample three-dimensional calorimeter, which belongs to the technical field of thermal analysis and comprises a support, an accommodating bottom plate and a cover plate. The bracket is fixedly connected with the accommodating bottom plate; the bracket is used for hanging the accommodating bottom plate in the large-sample three-dimensional calorimeter; a to-be-tested sample is placed on the accommodating bottom plate and is fixed through the cover plate. According to the sample cell specially suitable for the large-sample three-dimensional calorimeter, the sample cell can be hung in the large-sample three-dimensional calorimeter through the support, that is, when a to-be-measured sample is placed in the sample cell, the to-be-measured sample does not make contact with the bottom or the side wall of the large-sample three-dimensional calorimeter, and therefore the to-be-measured sample is prevented from being damaged. Therefore, the direct contact between the sample to be measured and the internal plate surface of the calorimeter is isolated, the sample to be measured can be exposed in a peripheral uniform environment, the measurement of the overall heat effect is facilitated, and the measurement accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of thermal analysis, and relates to a sample cell for a large sample three-dimensional calorimeter. BACKGROUND

[0002] The large sample three-dimensional calorimeter is a scientific instrument for measuring and analyzing the thermal effect of a large sample, which combines heat measurement technology and three-dimensional thermal field imaging capability, and is applied to the fields of material science, chemical engineering, environmental science and the like, especially in the thermal performance testing of high temperature and complex samples.

[0003] Compared with the traditional calorimeter, the large sample three-dimensional calorimeter has a larger sample space and can be applied to larger samples.

[0004] In the research on the large sample three-dimensional calorimeter, it is found that the current operation is to directly place the sample in the interior (such as the bottom plate) of the large sample three-dimensional calorimeter. Although this method is simple to operate, the sample directly contacts the inner wall or the bottom plate of the calorimeter, which may cause additional heat transfer and affect the accuracy of measurement. Especially when the sample produces volatile matter, condensation or deposition may occur at the contact surface in the instrument, which interferes with the experiment. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model provides a sample cell for a large sample three-dimensional calorimeter.

[0006] To achieve the above purpose, the utility model adopts the technical scheme that:

[0007] In a first aspect, the application provides a sample cell for a large sample three-dimensional calorimeter, which comprises a support, a containing bottom plate and a cover plate. The support is fixedly connected with the containing bottom plate, and the support is used to suspend the containing bottom plate in the interior of the large sample three-dimensional calorimeter. The sample to be measured is placed on the containing bottom plate and is fixed by the cover plate.

[0008] Optionally, the sample cell further comprises a screw. Screw holes are arranged at the same positions of the containing bottom plate and the cover plate. The screw passes through the screw holes in the containing bottom plate and the cover plate to fix the sample to be measured between the containing bottom plate and the cover plate.

[0009] Optionally, the screw is a spring screw.

[0010] Optionally, the interval distance between the containing bottom plate and the cover plate is adjusted by adjusting the rotation depth of the spring screw, so that different numbers of samples to be measured are placed in the sample cell.

[0011] Optionally, the accommodating bottom plate is further provided with a side plate, and the side plate is used for limiting the to-be-tested sample; and the limiting space for accommodating the to-be-tested sample is a square through the side plate.

[0012] Optionally, a target region of the first surface of the accommodating bottom plate is provided with a first row of plug-in plates; the first surface of the accommodating bottom plate is a surface of the accommodating bottom plate away from the cover plate; and the first row of plug-in plates are used for forming hot ends of first thermocouples.

[0013] Optionally, a plurality of target regions are provided on the first surface of the accommodating bottom plate; and each target region of the first surface of the accommodating bottom plate is provided with one first row of plug-in plates.

[0014] Optionally, a target region of the first surface of the cover plate is provided with a second row of plug-in plates; the first surface of the cover plate is a surface of the cover plate away from the accommodating bottom plate; and the second row of plug-in plates are used for forming hot ends of second thermocouples.

[0015] Optionally, a plurality of target regions are provided on the first surface of the cover plate; and each target region of the first surface of the cover plate is provided with one second row of plug-in plates.

[0016] The beneficial effects of the embodiments of the present application include that the embodiments of the present application provide a sample cell specially applicable to a large sample three-dimensional calorimeter, the sample cell can be hung in the interior of the large sample three-dimensional calorimeter through a support, that is, when a to-be-tested sample is placed in the sample cell, the to-be-tested sample does not contact the bottom or the side wall of the large sample three-dimensional calorimeter, thereby isolating the direct contact of the to-be-tested sample with the internal surface of the calorimeter, and the to-be-tested sample can be exposed to the uniform environment around, which is helpful for measuring the overall thermal effect and improving the measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A sectional view of the sample cell for the large sample three-dimensional calorimeter is provided for the embodiments of the present application;

[0018] Figure 2 A structural schematic view of the sample cell for the large sample three-dimensional calorimeter is provided for the embodiments of the present application;

[0019] Figure 3 A partial structural schematic view of the sample cell for the large sample three-dimensional calorimeter is provided for the embodiments of the present application;

[0020] Figure 4A simplified schematic diagram of a large sample three-dimensional calorimeter is provided for the embodiments of the present application.

[0021] Figure 5 An internal diagram of a large sample three-dimensional calorimeter is provided for the embodiments of the present application.

[0022] Figure 6 A connection schematic diagram of a sample cell and a reference cell is provided for the embodiments of the present application.

[0023] Figure 7 An overall top view of a sample cell and a reference cell is provided for the embodiments of the present application.

[0024] Reference signs:

[0025] 1000 - large sample three-dimensional calorimeter; 100 - sample cell; 10 - support; 20 - containing bottom plate; 30 - cover plate; 40 - spring screw; 50 - first row of plug-in board; 60 - second row of plug-in board; 200 - reference cell; 300 - measuring bin; 301 - heat insulation cooling layer; 302 - temperature equalizer layer; 303 - heater; 400 - first thermocouple; 401 - thermocouple monomer of first material; 402 - thermocouple monomer of second material; 500 - second thermocouple. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the research on the large sample three-dimensional calorimeter, it is found that the current operation is to directly place the sample in the interior (such as the bottom plate) of the large sample three-dimensional calorimeter. Although this method is simple to operate, the sample directly contacts the inner wall or the bottom plate of the calorimeter, which may cause additional heat transfer and affect the accuracy of measurement. Especially when the sample produces volatile matter, condensation or deposition may occur at the contact surface in the instrument, which interferes with the experiment.

[0028] In view of the above problems, the present application provides the following embodiments to solve them:

[0029] Please refer to Figures 1-3 The present application provides a sample cell 100 for a large sample three-dimensional calorimeter. The sample cell 100 comprises a support 10, a containing bottom plate 20 and a cover plate 30.

[0030] The bracket 10 is fixedly connected with the containing bottom plate 20, and is used for suspending the containing bottom plate 20 in the interior of the large sample three-dimensional calorimeter.

[0031] The sample to be measured is placed on the containing bottom plate 20 and fixed by the cover plate 30.

[0032] The sample to be measured can be, but is not limited to, electronic devices, alloys, building materials, etc. For example, the electronic devices can be electronic components such as batteries.

[0033] When the sample to be measured is a battery, the large sample three-dimensional calorimeter can analyze the thermal performance of the battery, including but not limited to thermal runaway, reaction heat, and thermal changes during the charging and discharging process of the battery.

[0034] The containing bottom plate 20 can be directly fixed by clamping with the cover plate 30, so that the sample to be measured is placed between the containing bottom plate 20 and the cover plate.

[0035] Of course, the containing bottom plate 20 can also be provided with a side plate, and the containing bottom plate 20, the cover plate 30 and the side plate form a limiting space (or a containing space), and the sample to be measured can be placed in the limiting space to be fixed.

[0036] It can be seen that the sample cell 100 provided by the embodiment of the present application is specially applicable to the large sample three-dimensional calorimeter, and the sample cell 100 can be suspended in the interior of the large sample three-dimensional calorimeter by the bracket 10. That is, when the sample to be measured is placed in the sample cell 100, the sample to be measured will not contact the bottom or the side wall of the large sample three-dimensional calorimeter, thereby isolating the direct contact between the sample to be measured and the internal surface of the calorimeter. By exposing the sample to be measured to the uniform environment around, the overall thermal effect can be measured, and the measurement accuracy is improved.

[0037] Optionally, the sample cell 100 further comprises a screw.

[0038] The screw hole is arranged at the same position of the containing bottom plate 20 and the cover plate 30.

[0039] The screw passes through the screw hole in the containing bottom plate 20 and the cover plate 30 to fix the sample to be measured between the containing bottom plate 20 and the cover plate 30.

[0040] Optionally, the screw is a spring screw 40.

[0041] The spring screw 40 is screwed into the screw hole in the containing bottom plate 20 and the cover plate 30 to fix the sample to be measured between the containing bottom plate 20 and the cover plate 302.

[0042] It should be noted that in actual research, it is found that the sample may experience a sharp change in temperature during thermal analysis, which may cause the volume of the sample to expand or shrink. For example, the battery may bulge during heating. Therefore, in this embodiment, the elastic structure of the spring screw 40 can automatically adjust the fixed pressure when the sample expands or shrinks, thereby avoiding the situation of loose fixation or damage due to expansion or shrinkage.

[0043] That is, in this embodiment, by using the spring screw 40, the temperature change can be adapted, the sample fixation problem caused by temperature fluctuation can be reduced, the sample can be ensured to be in a stable fixation state at all times, and the reliability and accuracy of the measurement result can be ensured.

[0044] Optionally, the spacing distance between the containing bottom plate 20 and the cover plate 30 is adjusted by adjusting the rotation depth of the spring screw 40, so as to place different amounts of samples to be measured in the sample pool 100.

[0045] That is, by adjusting the rotation depth of the spring screw 40, different amounts of samples to be measured can be placed in the sample pool 100. For example Figure 1 and Figure 2 As shown, by adjusting the rotation depth of the spring screw 40, three battery plates can be placed in the sample pool 100.

[0046] Of course, in other embodiments, by adjusting the rotation depth of the spring screw 40, one battery plate, two battery plates, five battery plates, etc. can be placed in the sample pool 100.

[0047] Optionally, the containing bottom plate 20 is further provided with a side plate, and the side plate is used to limit the sample to be measured; wherein the limiting space for containing the sample to be measured is square through the side plate.

[0048] That is, the sample pool 100 provided by the embodiment of the present application is suitable for square samples to be measured. Effective fixation and limitation of square samples can be realized, such as square batteries.

[0049] Optionally, the containing bottom plate 20 is further provided with a side plate, and the side plate is used to limit the sample to be measured; wherein the limiting space for containing the sample to be measured is circular through the side plate.

[0050] That is, the sample pool 100 provided by the embodiment of the present application is suitable for circular samples to be measured. Effective fixation and limitation of circular samples can be realized, such as circular batteries.

[0051] In other words, the sample pool 100 provided by the embodiment of the present application can not be limited to square samples, and various shapes of limiting spaces can be formed by setting different side plates, such as a circular shape.

[0052] Specifically, the embodiment of the present application can provide a super large adjustable sample cell 100, which can adapt to a sample size of 100*75, the thickness is adjustable, and the sample cell 100 is automatically compressed. The maximum expandable sample size can reach 150*100, and larger sizes (according to the needs). The sample cell 100 can accommodate rectangular, square, trapezoidal, disc-shaped and other various shaped samples, and even other special-shaped samples, and has strong universality and expandability.

[0053] Optionally, the target area of the first face of the containing bottom plate 20 is provided with a first row of plug-in plates 50. Wherein, the first face of the containing bottom plate 20 is the face of the containing bottom plate 20 away from the cover plate 30; the first row of plug-in plates 50 is used to form the hot end of the first thermocouple.

[0054] Optionally, the number of target areas provided on the first face of the containing bottom plate 20 is multiple; wherein, each target area on the first face of the containing bottom plate 20 is provided with a first row of plug-in plates 50.

[0055] It should be noted that the first row of plug-in plates 50 has multiple plug-in holes to facilitate the fixation of the thermoelectric junction, which can provide stable installation and convenient replacement.

[0056] Optionally, the target area of the first face of the cover plate 30 is provided with a second row of plug-in plates 60.

[0057] Wherein, the first face of the cover plate 30 is the face of the cover plate 30 away from the containing bottom plate 20; the second row of plug-in plates 60 is used to form the hot end of the second thermocouple.

[0058] Optionally, the number of target areas provided on the first face of the cover plate 30 is multiple; wherein, each target area on the first face of the cover plate 30 is provided with a second row of plug-in plates 60.

[0059] In order to facilitate the understanding of the application of the sample cell 100 of the present application, the large sample three-dimensional calorimeter provided with the sample cell 100 is described below.

[0060] Please refer to Figures 4-5 The embodiment of the present application provides a large sample three-dimensional calorimeter 1000, which comprises a sample cell 100, a reference cell 200 and a measuring chamber 300.

[0061] Wherein, the structure of the sample cell 100 and the reference cell 200 is completely same. The structure of the reference cell 200 can refer to the description of the sample cell 100 in the foregoing embodiments, which will not be repeated here. The inside of the sample cell 100 is used to load the sample to be measured, and the inside of the reference cell 200 is used to load the reference sample.

[0062] The sample cell 100 and the reference cell 200 are both hung inside the measuring chamber 300 through their respective supports.

[0063] In the embodiment of the present application, the sample cell 100 and the reference cell 200 are connected by a thermoelectric pile, which includes a plurality of first thermocouples 400.

[0064] It should be noted that the specific number of the first thermocouples 400 can be set according to actual needs, and the number of the first thermocouples 400 can be 10-20, which is not limited by the present application.

[0065] Specifically, the plurality of first thermocouples 400 are connected in series between the target area of the first surface of the sample cell 100 and the target area of the first surface of the reference cell 200; the hot end of the plurality of first thermocouples 400 is located at the target area of the first surface of the sample cell 100, and the cold end of the plurality of first thermocouples 400 is located at the target area of the first surface of the reference cell 200. The first surface of the sample cell 100 corresponds to the first surface of the holding plate 20.

[0066] It should be noted that since the sample cell 100 and the reference cell 200 have the same structure, the first surface of the sample cell 100 and the first surface of the reference cell 200 are also the same surface.

[0067] Please refer to Figure 6 , the plurality of first thermocouples 400 will be described below. Each first thermocouple 400 includes a first material thermocouple element 401 and a second material thermocouple element 402.

[0068] The first material can be gold platinum palladium; the second material can be gold. Of course, other thermocouple materials can also be used in actual applications, as long as the first material is different from the second material.

[0069] Taking the first thermocouple 400 in the middle layer as an example, the specific connection relationship is that the first end of the first material thermocouple element 401 of the first thermocouple 400 is connected to the target area of the first surface of the sample cell 100, and forms a thermoelectric junction with the second end of the second material thermocouple element of the previous first thermocouple 400. The second end of the first material thermocouple element 401 of the first thermocouple 400 is connected to the target area of the first surface of the reference cell 200, and forms a thermoelectric junction with the first end of the second material thermocouple element 402 of the first thermocouple 400. In turn, to form a thermoelectric pile stacked from top to bottom as shown in Figure 6 .

[0070] It should be noted that the large sample three-dimensional calorimeter 1000 provided by the embodiment of the present application can directly obtain the temperature difference between the target area of the first surface of the sample cell 100 and the target area of the first surface of the reference cell 200 through a differential calculation method, that is, the thermocouple connection method provides a left and right temperature difference sensing differential heat flow acquisition method.

[0071] The large sample three-dimensional calorimeter 1000 provided by the embodiment has the following beneficial effects:

[0072] First, the number of thermocouples of the existing large sample three-dimensional calorimeter is only 1-2, and only single-point measurement is provided. In the present application, by connecting multiple first thermocouples 400 in series and covering the target areas on the first surfaces of the sample cell 100 and the reference cell 200, a wider measurement range can be covered, and the sensitivity can be improved. The three-dimensional thermal effect of the large sample can be better characterized, and the analysis of the complex thermal behavior inside the sample can be realized.

[0073] Second, the single-point measurement of the existing large sample three-dimensional calorimeter is only for single-point measurement of the sample itself. In the large sample three-dimensional calorimeter 1000 of the present application, a reference cell 200 is also arranged. By connecting multiple first thermocouples 400 in series and covering the target areas on the first surfaces of the sample cell 100 and the reference cell 200, the temperature difference between the target areas on the first surfaces of the sample cell 100 and the reference cell 200 can be directly obtained, and the heat flow difference between the sample cell 100 and the reference cell 200 can be directly and accurately reflected, i.e., the heat change data can be directly measured.

[0074] In summary, the large sample three-dimensional calorimeter 1000 provided by the embodiment solves the problems of the existing single-point measurement calorimeter, such as low sensitivity and inability to measure heat change. That is, the large sample three-dimensional calorimeter 1000 provided by the embodiment can provide a larger range of measurement, and can directly measure the output heat change data.

[0075] Optionally, the sample cell 100 and the reference cell 200 are symmetrically arranged inside the measurement chamber 300. The first surface of the sample cell 100 faces the reference cell 200, and the first surface of the reference cell 200 also faces the sample cell 100.

[0076] In other words, the sample cell 100 and the reference cell 200 are arranged oppositely, and the central axis inside the measurement chamber 10 can be used as a symmetry axis for symmetrical arrangement.

[0077] The same positions of the second surface of the sample cell 100 and the second surface of the reference cell 200 are also provided with target areas.

[0078] The second surface of the sample cell 100 corresponds to the first surface of the cover plate 30.

[0079] The second surface of the sample cell 100 faces away from the reference cell 200, and the second surface of the reference cell 200 also faces away from the sample cell 100.

[0080] Please refer to Figure 7 In the embodiment, the sample cell 100 and the reference cell 200 are connected by a thermocouple, and the thermocouple further includes a plurality of second thermocouples 500.

[0081] It should be noted that the specific number of the second thermocouples 500 can be set according to actual needs, and the number of the second thermocouples 500 can be 10-20, which is not limited by the application.

[0082] Specifically, the plurality of second thermocouples 500 are connected in series between the target area of the second surface of the sample cell 100 and the target area of the second surface of the reference cell 200; the hot end of the plurality of second thermocouples 500 is located at the target area of the second surface of the sample cell 100, and the cold end of the plurality of second thermocouples 500 is located at the target area of the second surface of the reference cell 200.

[0083] For each second thermocouple 500, it includes a thermocouple element of a first material and a thermocouple element of a second material (which can be referred to the description of the foregoing embodiment).

[0084] The first material can be gold platinum palladium, and the second material can be gold. Of course, other thermocouple materials can also be used in actual application, as long as the first material is different from the second material.

[0085] The specific connection relationship is that the first end of the thermocouple element of the first material of the second thermocouple 500 is connected to the target area of the second surface of the sample cell 100, and forms a thermoelectric junction with the second end of the thermocouple element of the second material of the previous second thermocouple 500. The second end of the thermocouple element of the first material of the second thermocouple 500 is connected to the target area of the second surface of the reference cell 200, and forms a thermoelectric junction with the first end of the thermocouple element of the second material of the second thermocouple 500.

[0086] It should be noted that the large sample three-dimensional calorimeter 1000 provided in the embodiment can directly obtain the temperature difference between the target area of the second surface of the sample cell 100 and the target area of the second surface of the reference cell 200 through a differential calculation method.

[0087] The above-mentioned method has the following beneficial effects: first, the sample cell 100 and the reference cell 200 are symmetrically arranged inside the measurement chamber 300, providing a symmetric arrangement that can reduce errors caused by asymmetric heat flow and ensure that the thermal behavior of the samples in the sample cell 100 and the reference cell 200 has higher consistency. The symmetric arrangement makes the heat flow distribution more uniform, thereby improving the accuracy of heat flow measurement.

[0088] Secondly, by also providing target areas at the same positions of the second surface of the sample cell 100 and the second surface of the reference cell 200, and by connecting a plurality of second thermocouples in series between the target areas of the second surface of the sample cell 100 and the target areas of the second surface of the reference cell 200, the thermal behavior of the whole sample can be more comprehensively reflected, and local deviations caused by single-face measurement can be reduced, further improving the reliability and stability of the measurement results. At the same time, the configuration of the double-face thermocouples can enhance the symmetry of the overall temperature field, so that the influence of environmental temperature fluctuations on the sample cell 100 and the reference cell 200 tends to be consistent, reducing the influence of environmental interference and further improving the accuracy of the measurement data.

[0089] Optionally, the first surface of the sample cell 100 and the first surface of the reference cell 200 are provided with at least two target areas; and the target areas at the same positions of the first surface of the sample cell 100 and the first surface of the reference cell 200 correspond one-to-one; the second surface of the sample cell 100 and the second surface of the reference cell 200 are provided with at least two target areas; and the target areas at the same positions of the second surface of the sample cell 100 and the second surface of the reference cell 200 correspond one-to-one.

[0090] As shown in Figure 7 In the embodiment of the present application, the first surface of the sample cell 100 and the first surface of the reference cell 200 are provided with three target areas. A plurality of first thermocouples 400 are connected in each corresponding target area. The second surface of the sample cell 100 and the second surface of the reference cell 200 are provided with two target areas, and a plurality of second thermocouples 500 are connected in each corresponding target area.

[0091] It can be seen that in the embodiment of the present application, at least two target areas are provided on the first surface of the sample cell 100 and the first surface of the reference cell 200, and at least two target areas are provided on the second surface of the sample cell 100 and the second surface of the reference cell 200. For the first surface and the second surface, a measurement range with a larger coverage range can be provided, i.e., heat flow measurement can be performed at multiple positions of the first surface and the second surface, and more detailed and comprehensive thermal distribution data can be provided. At the same time, it is also more helpful for in-depth analysis of the thermal behavior of the sample in different thermal effect regions.

[0092] Please continue to refer to Figure 4 and Figure 5 Optionally, the measurement chamber 300 can include a heat-insulating cooling layer 301, a uniform temperature layer 302, and a heater 303.

[0093] The heat-insulating cooling layer 301 is arranged outside the uniform temperature layer 302.

[0094] The heat insulation and cooling layer 301 is used for isolating the external environment and reducing internal heat loss. The outer layer thereof can be provided with a cooler connected with circulating cooling liquid to achieve cooling effect. The cooler is used for preventing high temperature of the outer wall of the instrument when the instrument is used at high temperature, reducing environmental influence, and also playing a safety protection role.

[0095] The surface of the temperature equalizer layer 302 is provided with a heater 303 to control the internal temperature field.

[0096] The temperature equalizer layer 302 is in a whole cylindrical shape, and the upper surface, the lower surface and the cylindrical surface of the temperature equalizer layer 302 are all provided with a heater capable of being independently controlled by a computer to realize accurate control of the internal temperature field of the calorimeter, and rapid heating can be performed.

[0097] In summary, the large sample three-dimensional calorimeter 1000 provided by the embodiment of the present application mainly utilizes the basic principle of three-dimensional microcalorimetry, adopts differential heat flow calorimetry, and combines an adjustable large sample cell structure, so that the large sample three-dimensional calorimeter 1000 can be suitable for heat flow measurement of large-size and special-shaped samples such as blade batteries. The temperature range for use is wide, and the large sample three-dimensional calorimeter 1000 can meet the test conditions of temperature scanning and constant temperature in any temperature range from room temperature to 700 DEG C, and also takes into account external charging and discharging, high voltage, chromatography and other synchronous tests.

[0098] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0099] In the present application, the reference "one embodiment" or "some embodiments" means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0100] In the description of the embodiments of the present application, it is understood that the terms "up", "down", "front", "back", "left", "right", "straight", "horizontal", "center", "top", "bottom", "top", "bottom", "inner", "outer", "inner side", "outer side" and the like indicate the orientation or positional relationship.

[0101] In the description of the embodiments of the utility model, it needs to be explained that, unless there is definite stipulation and limitation, the terms "mount", "connect", "connection", "assemble" should be understood in broad sense, for example, it can be fixed connection, also can be detachable connection, or integral connection, can be direct connection, also can be indirect connection through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0102] In the description of the embodiments of the utility model, specific features, structure, material or characteristics can be combined in any one or more embodiments or examples in a suitable way.

[0103] In the description of the embodiments of the utility model, it needs to be understood that "-" and "~" represent the range between two numerical values, and the range includes end point. For example, "A-B" represents the range of greater than or equal to A and less than or equal to B. "A~B" represents the range of greater than or equal to A and less than or equal to B.

[0104] In the description of the embodiments of the utility model, the term "and / or" in this paper is only the association relation of the associated object, indicates that there can be three kinds of relations, for example, A and / or B, can indicate: exist A alone, exist A and B simultaneously, exist B alone these three cases. In addition, the character " / " in this paper generally indicates that the associated object before and after is "or" relation.

[0105] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that the embodiments can be changed, modified, replaced and changed in many ways without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A sample cell for a large-sample three-dimensional calorimeter, characterized in that, The sample cell includes: a support, a receiving base plate, and a cover plate; The bracket is fixedly connected to the receiving base plate, and the bracket is used to suspend the receiving base plate inside the large sample three-dimensional calorimeter. The sample to be tested is placed on the receiving base plate and fixed by the cover plate.

2. The sample cell for a large-sample three-dimensional calorimeter according to claim 1, characterized in that, The sample cell also includes screws; Screw holes are provided at the same positions on the receiving base plate and the cover plate; The sample to be tested is fixed between the base plate and the cover plate by passing the screw through the screw holes in the base plate and the cover plate.

3. The sample cell for a large-sample three-dimensional calorimeter according to claim 2, characterized in that, The screw is a spring screw.

4. The sample cell for a large-sample three-dimensional calorimeter according to claim 3, characterized in that, By adjusting the rotation depth of the spring screw, the distance between the receiving base plate and the cover plate can be adjusted, thereby placing different numbers of test samples in the sample pool.

5. The sample cell for a large-sample three-dimensional calorimeter according to claim 1, characterized in that, The receiving base plate is also provided with a side plate, which is used to limit the position of the sample to be tested; The side plate makes the limiting space for accommodating the sample to be tested square.

6. The sample cell for a large-sample three-dimensional calorimeter according to claim 1, characterized in that, The receiving base plate is also provided with a side plate, which is used to limit the position of the sample to be tested; The side plate makes the limiting space for accommodating the sample to be tested circular.

7. The sample cell for a large-sample three-dimensional calorimeter according to claim 1, characterized in that, The target area of ​​the first side of the receiving base plate is provided with a first row of insert plates; Wherein, the first surface of the receiving base plate is the surface of the receiving base plate that is away from the cover plate; The first row of inserts is used to form the hot junction of the first thermocouple.

8. The sample cell for a large-sample three-dimensional calorimeter according to claim 7, characterized in that, The number of target areas set on the first surface of the receiving base plate is multiple; Each target area on the first surface of the receiving base plate is provided with a first row of insert plates.

9. The sample cell for a large-sample three-dimensional calorimeter according to claim 1, characterized in that, The target area on the first side of the cover plate is provided with a second row of insert plates; Wherein, the first side of the cover plate is the side of the cover plate that is away from the receiving bottom plate; The second row of inserts is used to form the hot junction of the second thermocouple.

10. The sample cell for a large-sample three-dimensional calorimeter according to claim 9, characterized in that, The number of target areas set on the first surface of the cover plate is multiple; Each target area on the first side of the cover plate is provided with a second row of insert plates.

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