Graphite thermostat

Abstract

The utility model provides a graphite thermostat which comprises a shell, a hole is formed inwards in the upper surface of the shell to form a temperature control area, a temperature control panel is arranged on one side of the temperature control area, a heating layer electrically connected with the temperature control panel is laid on the bottom face of the temperature control area, a detachable graphite heating body is arranged in the temperature control area, and when the graphite heating body is placed in the temperature control area, the graphite heating body can be heated through the heating layer. The bottom heating layer is attached; at least one test tube hole is downwards formed in the upper surface of the graphite heating body, and the test tube hole sequentially comprises a conical bottom, a cylindrical middle part and a top of which the inner diameter is gradually increased from bottom to top. The problems that a thermostat panel adopted in an existing test is prone to corrosion and poor in temperature uniformity are solved. The heating uniformity and efficiency can be improved, and the heat preservation effect is improved.

Description

Technical Field

[0001] The present application belongs to the field of temperature control of test products, and specifically relates to a graphite thermostat. Background Art

[0002] The graphite thermostat is a sample pretreatment device during the test process. It is widely used in the sample pretreatment stage of marine environment monitoring, food sample determination, agricultural product testing and disease control.

[0003] In the prior art, direct electric heating is commonly used to control the temperature of sample tubes. However, the panels used in the electric heating method are prone to corrosion, have low heating efficiency, and poor temperature uniformity, which is not conducive to accurate measurement and maintenance of sample temperature. Moreover, since the bottom of the centrifuge tube is generally conical, a cavity will be generated with the bottom of the test tube hole during actual application. If a test tube hole with a matching shape is used, a cavity will also be formed when an ordinary test tube is placed. The formation of the cavity is not conducive to temperature maintenance and measurement. In the actual field of disease control and testing, temperature control or temperature maintenance should be as precise as possible to ensure the accuracy of the experimental results. The existing technology cannot solve the problem of timely matching between sample tubes and samples. Utility Model Content

[0004] The present application provides a graphite thermostat, which solves the problems of easy corrosion of thermostat panels and poor temperature uniformity used in current experiments, as well as the problem of incompatibility between test tube holes and sample tubes.

[0005] The technical solution of this application is as follows:

[0006] A graphite thermostat comprises a housing, wherein an upper surface of the housing is provided with an inward opening to form a temperature control zone, a temperature control panel is provided on one side of the temperature control zone, a heating layer electrically connected to the temperature control panel is provided on the bottom surface of the temperature control zone, and a detachable graphite heating element is provided inside the temperature control zone. When the graphite heating element is placed in the temperature control zone, its lower surface abuts against the heating layer.

[0007] At least one test tube hole is downwardly opened on the upper surface of the graphite heating body, and the test tube hole comprises, from bottom to top, a conical bottom, a cylindrical middle part and a top part with a gradually increasing inner diameter.

[0008] The graphite heating body is of a split structure, comprising a main body and a casing detachably connected to the test tube hole. The shape of the casing is adapted to the test tube hole and a carrying portion is provided at the top along the circumference thereof, which can overlap the top. The casing is a lattice shell structure and the surface of the lattice shell structure is provided with holes of the same diameter.

[0009] The test tube hole is filled with graphite particles of different particle sizes. When the sleeve falls into the test tube hole, the graphite particles with a particle size larger than the hole are excluded, and the graphite particles with a particle size smaller than the hole enter the interior of the sleeve.

[0010] Furthermore, there are two graphite heating bodies, each of which is individually controlled by a temperature control panel and each graphite heating body is provided with two test tube holes.

[0011] Due to the adoption of the above technical solution, the beneficial effects of this application are as follows:

[0012] 1. This application uses a detachable graphite heating body. The detachable structure can realize the opening of test tube holes suitable for different specifications on different graphite heating bodies, which can increase the contact area between the test tube and the graphite heating body, thereby making the heating and heat preservation process more efficient and improving the temperature environment stability of the sample. This application uses the good thermal uniformity of high-purity graphite bodies to efficiently insulate and measure the temperature of centrifuge tubes. The detachable graphite body can achieve uniform temperature conduction of various parts of the tube body through the three-dimensional wrapping structure to obtain a more accurate tube body temperature.

[0013] 2. This application adopts the method of laying a heating layer to indirectly heat and insulate the sample through a graphite heating body. This application is a three-dimensional wrapping heating with less heat loss, and can make full use of the physical properties of graphite, making the heating of the sample more uniform and the temperature response rapid, while also avoiding the insulation blind spot caused by single-point contact.

[0014] 3. The graphite heating body of the present application is a split structure. In the split structure, a shell is added inside the test tube hole, and the upper end of the shell is mounted on the edge of the test tube hole. The size of the shell is smaller than the size of the test tube hole, but the shapes of the two match, so a space is formed between the shell and the inner wall of the test tube hole. Graphite particles of different particle sizes are filled in this space, and small-size graphite particles can enter the space inside the lattice shell through the holes of the lattice shell. The purpose is to fill the gap between the test tube or centrifuge tube and the test tube hole, which can significantly increase heat transfer, ensure heat accumulation, improve heating efficiency, and achieve uniform heating. In specific use, the graphite particles can be placed first, and the large-size particles will be automatically displaced after the shell and test tube are inserted; or the shell and test tube can be placed first, and then the graphite particles are poured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0016] Figure 1 A schematic diagram of the structure of a graphite thermostat provided in this application;

[0017] Figure 2 This is a schematic diagram of the structure of the graphite heating block described in this application;

[0018] Figure 3 This is a schematic diagram of the structure of the split-structure graphite heating block in this application;

[0019] In the attached figure:

[0020] 1. Shell; 2. Temperature control area; 3. Temperature control panel; 4. Heating layer; 5. Graphite heating element; 6. Test tube hole; 6-1. Bottom; 6-2. Middle; 6-3. Top; 7. Case; 7-1. Hole; 7-2. Carrying part; 8. Graphite particles. DETAILED DESCRIPTION

[0021] Based on the background technology, as shown in the attached Figure 1 and attached Figure 2 As shown, the present application provides a graphite thermostat, comprising a shell 1, the upper surface of the shell 1 having an inward opening to form a temperature control zone 2, a temperature control panel 3 being provided on one side of the temperature control zone 2, a heating layer 4 being electrically connected to the temperature control panel 3 being provided on the bottom surface of the temperature control zone 2, a detachable graphite heating body 5 being provided inside the temperature control zone 2, and when the graphite heating body 5 is placed in the temperature control zone 2, the heating layer 4 on its lower surface is abutted against the upper surface of the graphite heating body 5 and is downwardly opened with at least one test tube hole 6, the test tube hole 6 comprising, from bottom to top, a conical bottom 6-1, a cylindrical middle portion 6-2 and a top 6-3 with a gradually increasing inner diameter.

[0022] The graphite heating body 5 of the present application is a split structure. When the split structure is used, a shell 7 is added to the test tube hole 6, and the upper end of the shell is mounted on the edge of the test tube hole 6. The size of the shell 7 is smaller than the test tube hole size, but the shapes of the two match, so a space is formed between the shell 7 and the inner wall of the test tube hole 6. Graphite particles 8 of different particle sizes are filled in this space, and small-particle graphite particles 8 can enter the space inside the shell through the holes of the lattice shell. The purpose is to fill the gap between the test tube or centrifuge tube and the test tube hole, which can significantly increase heat transfer, ensure heat accumulation, improve heating efficiency, and achieve uniform heating. In specific use, the graphite particles 8 can be placed first, and the shell 7 and the test tube will automatically exclude large-particle particles after insertion; or the shell and the test tube can be placed first, and then the graphite particles 8 are poured.

[0023] When the centrifuge tube or test tube is placed in the test tube hole 6, the bottom of the tube body contacts the bottom 6-1 of the test tube hole 6 to achieve direct heat transfer, and a small part of the non-contact area can also be heated by radiation.

[0024] In practice, the temperature control panel 3 can be implemented based on existing technologies. It includes a control panel and a temperature sensor. The temperature sensor monitors the temperature of the heating layer 4 or the graphite heating element 5 and displays the temperature on the control panel. The panel also includes a temperature increase button, a temperature decrease button, and a switch to adjust the temperature of the heating layer 4.

[0025] In a specific implementation, the heating layer 4 can be a PTC constant temperature heating sheet, which is laid on the bottom surface of the temperature control area 2 and the temperature is controlled by the temperature control panel 3.

[0026] This application uses a detachable graphite heating element 5, which can heat test tubes of different specifications by changing the size of the graphite heating element 5. Moreover, the graphite heating element 5 has good thermal conductivity and can evenly wrap and heat the sample, which also solves the problem of heating blind spots in single-point heating methods. The three-dimensional wrapping heating generates less heat loss, so the temperature control is more precise and the heating efficiency is higher.

[0027] As attached Figure 3 As shown, the graphite heating body 5 is a split structure, comprising a main body and a sleeve 7 detachably connected to the test tube hole 6. The shape of the sleeve 7 is adapted to the test tube hole 6 and a carrying portion 7-2 is provided at the top along the circumference that can overlap the top 6-3. The sleeve 7 is a lattice shell structure, and the surface of the lattice shell structure is provided with holes 7-1 of the same diameter. The test tube hole 6 is filled with graphite particles 8 of different particle sizes. When the sleeve 7 falls into the test tube hole 6, the graphite particles 8 with a particle size larger than the hole 7-1 are displaced, and the graphite particles 8 with a particle size smaller than the hole 7-1 enter the interior of the sleeve 7. It should be noted that the shape of the hole 7-1 can be non-circular, but its size should be as uniform as possible.

[0028] In the split structure, a shell 7 is added to the test tube hole 6, and the upper end of the shell 7 is mounted on the edge of the test tube hole 6. The size of the shell 7 is smaller than the size of the test tube hole 6, but the shapes of the two match, so a space is formed between the shell 7 and the inner wall of the test tube hole 6. Graphite particles 8 of different particle sizes are filled in this space, and small-sized graphite particles 8 can enter the space inside the lattice shell through the holes 7-1 of the lattice shell. This purpose is to fill the gap between the test tube or centrifuge tube and the test tube hole 6, which can significantly increase heat transfer, ensure heat accumulation, improve heating efficiency, and achieve uniform heating. In specific use, the graphite particles 8 can be placed first, and the shell 7 and test tube will automatically exclude large-sized particles after insertion; or the shell 7 and test tube can be placed first, and then the graphite particles 8 can be poured. The shell 7 and graphite particles 8 can be cast with graphite according to demand.

[0029] When heating the split structure, it is necessary to pour the pre-mixed graphite particles 8 into the test tube hole 6, then insert the sleeve and centrifuge tube combination, and shake it slightly to allow the small-particle graphite particles 8 to enter the sleeve. After heating is completed, the tube body and sleeve can be removed.

[0030] In a specific embodiment of the above embodiment, there are two graphite heating bodies 5, each of which is independently controlled by a temperature control panel 3 and each of which is provided with two test tube holes 6. The two graphite heating bodies 5 are arranged in different temperature control zones 2 to achieve zoned heating.

[0031] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0032] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A graphite thermostat, comprising a housing, wherein the upper surface of the housing is opened inwardly to form a temperature control zone, a temperature control panel is provided on one side of the temperature control zone, and a heating layer electrically connected to the temperature control panel is provided on the bottom surface of the temperature control zone; a detachable graphite heating body is provided inside the temperature control zone, and when the graphite heating body is placed in the temperature control zone, its lower surface is in contact with the heating layer; characterized in that At least one test tube hole is downwardly opened on the upper surface of the graphite heating body, and the test tube hole includes, from bottom to top, a conical bottom, a cylindrical middle part, and a top part with a gradually increasing inner diameter; The graphite heating body is of a split structure, comprising a main body and a casing detachably connected to the test tube hole. The shape of the casing is adapted to the test tube hole and a carrying portion is provided at the top along the circumference thereof, which can overlap the top. The casing is a lattice shell structure and the surface of the lattice shell structure is provided with holes of the same diameter. The test tube hole is filled with graphite particles of different particle sizes. When the sleeve falls into the test tube hole, the graphite particles with a particle size larger than the hole are excluded, and the graphite particles with a particle size smaller than the hole enter the interior of the sleeve.

2. A graphite thermostat according to claim 1, characterized in that: There are two graphite heating bodies, each of which is individually controlled by a temperature control panel and each of which is provided with two test tube holes.

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