Wireless high heat absorption type temperature recorder for temperature calibration of vacuum drying oven
The wireless high-heat absorption temperature recorder addresses the issue of inaccurate calibration in vacuum drying ovens by ensuring stable sensor contact and precise data transmission, enhancing detection accuracy and reproducibility.
Patent Information
- Application Number
- CN202421216627.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-30
AI Technical Summary
Existing wireless temperature recorders for vacuum drying ovens lack standardized positioning and orientation, leading to inaccurate temperature calibration and poor reproducibility, which affects the metrological characteristics of the vacuum drying ovens.
A wireless high-heat absorption temperature recorder with a temperature sensor telescopically attached via an elastic pressure mechanism, ensuring stable contact with the metal partition, and data transmission via WiFi, featuring a PEEK or PPS shell with low thermal expansion, and a design that minimizes environmental impact.
Ensures accurate temperature detection with ±0.1°C error and 0.01°C resolution, maintaining stable heat conduction and improving calibration precision by stabilizing the sensor's position.
Smart Images
Figure CN222298978U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measurement and detection, in particular to a wireless high-heat absorption temperature recorder used for temperature calibration of a vacuum drying box. Background Art
[0002] When the vacuum drying oven is working, a certain degree of vacuum can be maintained inside the box. It is used to dry easily decomposable, easily oxidizable substances and items with complex components. It is widely used in biochemistry, pharmaceuticals, medical care, agriculture, environmental protection and other fields. In order to ensure the normal use of the vacuum drying oven, regular calibration is required. The calibration is generally divided into two aspects: temperature and pressure. Due to the particularity of the vacuum environment, the temperature calibration method of the vacuum drying oven is different from the temperature calibration method of ordinary environmental test equipment. There are three basic forms of heat transfer, namely heat conduction, heat radiation and heat convection. When the vacuum drying oven is in a vacuum state, because the air medium is extracted, the gas flow is weak, and the heat convection effect is very weak. The inner wall and the layered partition of the vacuum drying oven are generally made of stainless steel or galvanized steel plate. If the heating component is set in the lower part or side wall of the box, the heat will be conducted through the inner wall and the partition. The vacuum drying oven adopts the method of heating the bottom wall or side wall of the box body first, and then radiating heating from the bottom wall to the top or the side wall to the center. In actual use, the items to be vacuum heated are usually placed on the surface of the middle partition. In JJF (Su) 177-2015 "Vacuum Drying Oven Temperature and Pressure Calibration Specification", it is proposed to use a wireless temperature recorder placed on the center partition of the box for temperature measurement. However, in the calibration specification, the position and orientation of the wireless temperature recorder on the partition, which directly affect the temperature indication error result, are not regulated. There are also many types of wireless temperature recorders on the market, which makes it difficult for calibration personnel to operate accurately on site, which may directly lead to poor repeatability and reproducibility of temperature indication error calibration, and even lead to misjudgment of the metrological characteristics of the vacuum drying oven under inspection. Therefore, it is necessary to propose a wireless temperature recorder that can be reliably applied to vacuum drying oven temperature calibration. Utility Model Content
[0003] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the utility model is to provide a wireless high heat absorption temperature recorder for vacuum drying box temperature calibration.
[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model to solve the technical problem is: a wireless high heat absorption temperature recorder for temperature calibration of a vacuum drying oven, comprising:
[0005] The recorder body comprises a housing, a control panel, a temperature sensor, an elastic pressure mechanism and four contacts. The control panel is located inside the housing and comprises a data processing chip, a data storage chip, a WiFi chip and a battery. The four contacts are respectively installed at four corners of the recorder body, and the tops of the four contacts protrude from the lower surface of the housing of the recorder body. The temperature sensor is telescopically installed at the middle position of the recorder body via the elastic pressure mechanism, and the lower surface of the temperature sensor protrudes from the lower surface of the housing of the recorder body.
[0006] A pressing block is installed above the recorder body, and the lower surface of the pressing block has an embedded groove matching the outer contour of the top of the recorder body.
[0007] By adopting the technical solution of the utility model, when in use, the temperature sensor of the recorder is closely attached to the geometric center position of the metal partition inside the vacuum drying box to absorb heat conduction. The data measured by the temperature sensor is stored in the internal data storage chip, and is wirelessly connected to the computer / mobile phone / tablet computer and other terminals outside the vacuum drying box through WIFI technology, and the temperature data can be viewed / recorded in real time through the terminal. Due to the gravity of the pressing block and the support of the four contacts, the recorder can be stably maintained on the metal partition inside the vacuum drying box, and the elastic pressure mechanism can ensure that the temperature sensor and the metal partition of the vacuum drying box maintain a stable contact pressure, ensuring that the heat conduction effect remains stable and improving the accuracy of temperature detection.
[0008] Furthermore, the measuring range of the temperature sensor is 25-150°C, the maximum allowable error in the entire measuring range is ±0.1°C, and the resolution is 0.01°C.
[0009] The above preferred solution is adopted to meet the temperature calibration requirements of the vacuum drying oven and ensure the detection accuracy.
[0010] Furthermore, the four contacts are respectively connected to a VCC power pin, a GND ground pin, a D+ positive pin and a D- negative pin of the USB interface of the control board.
[0011] By adopting the above preferred solution, the data stored in the data storage chip can be exported by contacting the dedicated reading base through four contacts.
[0012] Furthermore, the recorder body shell is made of PEEK or PPS.
[0013] By adopting the above preferred solution, the shell material is selected from a material with relatively low specific heat capacity and relatively low thermal expansion coefficient, so as to reduce the influence on the internal temperature field of the vacuum drying box.
[0014] Furthermore, the shell includes an upper cover, an intermediate shell, a lower cover and a sealing sleeve, the upper cover, the intermediate shell and the lower cover are connected by screw locking, the sealing sleeve includes a horizontal portion located at the lower end and a sleeve portion extending upward from the horizontal portion, the sleeve portion has an inner cavity for accommodating an elastic pressure mechanism, the horizontal portion is embedded in the opening of the lower cover, the sleeve portion extends upward to the lower surface of the upper cover, and the control panel is located in the cavity formed by the upper cover, the intermediate shell, the lower cover and the sealing sleeve.
[0015] The above preferred solution is adopted to facilitate assembly and manufacturing, and the control panel is placed in a closed cavity, thereby reducing the impact of the environment in the vacuum drying box on it and increasing its service life.
[0016] Furthermore, the data processing chip, data storage chip, WiFi chip and battery are high temperature resistant models.
[0017] Furthermore, the elastic pressure mechanism includes a guide column, an inner retaining ring, a compression spring and an outer retaining ring, the guide column is fixedly connected to the upper cover, the inner retaining ring, the compression spring and the outer retaining ring are sequentially mounted on the guide column from top to bottom, the temperature sensor is installed on the lower end surface of the outer retaining ring, and the temperature sensor can move up and down along the guide column with the outer retaining ring.
[0018] The above preferred solution has a simple structure and is easy to install, ensuring that the temperature sensor can move up and down smoothly and that the temperature sensor can be stably pressed against the surface of the partition.
[0019] Furthermore, the guide column has an axial hole at its center, the upper end of the guide column is locked and connected to the upper cover via screws, and the connecting line of the temperature sensor passes through the axial hole of the guide column and is connected to the control board signal.
[0020] Furthermore, a stopper is provided at the lower end of the guide column for limiting the downward movement of the outer retaining ring to an extreme position.
[0021] The above preferred solution is adopted to facilitate wiring and prevent the elastic pressure mechanism from interfering with the temperature sensor connection line. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a structural schematic diagram of an implementation method of the utility model.
[0024] Figure 2 It is a stereoscopic diagram of one embodiment of the recorder body.
[0025] Figure 3 It is a cross-sectional view of one embodiment of the recorder body.
[0026] The numbers and letters in the figure represent the names of the corresponding parts:
[0027] 10-recorder body; 11-housing; 111-upper cover; 112-middle housing; 113-lower cover; 114-sealing sleeve; 1141-horizontal part; 1142-sleeve part; 12-control board; 13-temperature sensor; 14-elastic pressure mechanism; 141-guide column; 1411-axial hole; 1412-stop part; 142-inner retaining ring; 143-compression spring; 144-outer retaining ring; 15-contact; 20-pressure block. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] like Figure 1-3 As shown, a wireless high-absorption temperature recorder for vacuum drying box temperature calibration comprises:
[0030] The recorder body 10 includes a housing 11, a control board 12, a temperature sensor 13, an elastic pressure mechanism 14 and four contacts 15. The control board 12 is located inside the housing 11, and includes a data processing chip, a data storage chip, a WiFi chip and a battery. The four contacts 15 are respectively installed at four corners of the recorder body 10, and the tops of the four contacts 15 protrude from the lower surface of the recorder body housing 11. The temperature sensor 13 is telescopically installed at the middle position of the recorder body 10 through the elastic pressure mechanism 14, and the lower surface of the temperature sensor 13 protrudes from the lower surface of the recorder body housing 11.
[0031] The pressing block 20 is installed above the recorder body 10 , and the lower surface of the pressing block 20 has an embedded groove matching the outer contour of the top of the recorder body 10 .
[0032] When in use, the temperature sensor of the recorder is closely attached to the geometric center of the metal partition inside the vacuum drying oven to absorb heat conduction. The data measured by the temperature sensor is stored in the internal data storage chip, and is wirelessly connected to the computer / mobile phone / tablet computer and other terminals outside the vacuum drying oven through WIFI technology, and the temperature data can be viewed / recorded in real time through the terminal. The beneficial effect of adopting the above technical solution is: due to the gravity of the pressing block and the support of the four contacts, the recorder can be stably maintained on the metal partition inside the vacuum drying oven, and the elastic pressure mechanism can ensure that the temperature sensor and the metal partition of the vacuum drying oven maintain a stable contact pressure, ensuring that the heat conduction effect remains stable and improving the accuracy of temperature detection.
[0033] In other embodiments of the present invention, the measurement range of the temperature sensor 13 is 25-150° C., the maximum allowable error in the entire measurement range is ±0.1° C., and the resolution is 0.01° C. The beneficial effect of adopting the above technical solution is: meeting the temperature calibration requirements of the vacuum drying oven and ensuring the detection accuracy.
[0034] In some other embodiments of the utility model, the four contacts 15 are respectively connected to the VCC power supply pin, the GND ground pin, the D+ positive pin and the D- negative pin of the control board USB interface. In addition, a dedicated reading base is configured, and the dedicated reading base is configured with jacks matching the four contacts, and each jack is connected to the USB plug through a lead wire. The beneficial effect of adopting the above technical solution is that the data stored in the data storage chip can be exported by the four contacts contacting the dedicated reading base.
[0035] In other embodiments of the present invention, the shell of the recorder body 10 is made of PEEK or PPS. The beneficial effect of the above technical solution is that the shell material is selected from materials with relatively low specific heat capacity and relatively low thermal expansion coefficient, which reduces the impact on the temperature field inside the vacuum drying box.
[0036] like Figure 3 As shown, in some other embodiments of the utility model, the housing 11 includes an upper cover 111, an intermediate housing 112, a lower cover 113 and a sealing sleeve 114, the upper cover 111, the intermediate housing 112 and the lower cover 113 are connected by screw locking, the sealing sleeve 114 includes a horizontal portion 1141 located at the lower end and a sleeve portion 1142 extending upward from the horizontal portion, the sleeve portion 1142 has an inner cavity for accommodating the elastic pressure mechanism 14, the horizontal portion 1141 is embedded in the opening of the lower cover 113, the sleeve portion 1142 extends upward to the lower surface of the upper cover 111, and the control board 12 is located in the cavity formed by the upper cover 111, the intermediate housing 112, the lower cover 113 and the sealing sleeve 114. The beneficial effects of adopting the above technical solution are: convenient assembly and manufacturing, placing the control board in a closed cavity, reducing the impact of the environment in the vacuum drying box on it, and improving the service life.
[0037] In other embodiments of the present invention, the data processing chip, data storage chip, WiFi chip and battery are selected to be high temperature resistant models to ensure stable and reliable performance.
[0038] like Figure 3 As shown, in some other embodiments of the utility model, the elastic pressure mechanism 14 includes a guide column 141, an inner retaining ring 142, a compression spring 143 and an outer retaining ring 144, the guide column 141 is fixedly connected to the upper cover 111, the inner retaining ring 142, the compression spring 143 and the outer retaining ring 144 are sequentially sleeved on the guide column 141 from top to bottom, the temperature sensor 13 is installed on the lower end surface of the outer retaining ring 144, and the temperature sensor 13 can move up and down along the guide column 141 with the outer retaining ring 144. The beneficial effects of adopting the above technical solution are: simple structure, convenient installation, ensuring that the temperature sensor can move up and down smoothly, and ensuring that the temperature sensor can be stably pressed against the surface of the partition.
[0039] like Figure 3 As shown, in some other embodiments of the utility model, the guide column 141 has an axial hole 1411 at the center, the upper end of the guide column 141 is locked and connected to the upper cover 111 through a screw, and the connection line of the temperature sensor 13 passes through the axial hole 1411 of the guide column and is electrically connected to the control board 12. The lower end of the guide column 141 is provided with a stopper 1412 for limiting the downward movement of the outer retaining ring 144 to the extreme position. The beneficial effects of adopting the above technical solution are: facilitating wiring and preventing the elastic pressure mechanism from interfering with the temperature sensor connection line.
[0040] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable ordinary technicians in the field to understand the content of the utility model and implement it. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A wireless high-endothermic temperature recorder for vacuum drying oven temperature calibration, characterized in that: include: The recorder body includes a housing, a control panel, a temperature sensor, an elastic pressure mechanism and four contacts. The control panel is located inside the housing and includes a data processing chip, a data storage chip, a WiFi chip and a battery. The four contacts are respectively installed at the four corners of the recorder body, and the tops of the four contacts protrude from the lower surface of the recorder body shell; the temperature sensor is telescopically installed at the middle position of the recorder body through an elastic pressure mechanism, and the lower surface of the temperature sensor protrudes from the lower surface of the recorder body shell; A pressing block is installed above the recorder body, and the lower surface of the pressing block has an embedded groove matching the outer contour of the top of the recorder body.
2. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 1, characterized in that: The measuring range of the temperature sensor is 25-150°C, the maximum allowable error in the entire measuring range is ±0.1°C, and the resolution is 0.01°C.
3. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 1, characterized in that: The four contacts are respectively connected to the VCC power pin, the GND ground pin, the D+ positive pin and the D- negative pin of the USB interface of the control board.
4. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 1, characterized in that: The material of the recorder body shell is PEEK or PPS.
5. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 1, characterized in that: The shell includes an upper cover, an intermediate shell, a lower cover and a sealing sleeve, wherein the upper cover, the intermediate shell and the lower cover are connected by screw locking, the sealing sleeve includes a horizontal portion located at the lower end and a sleeve portion extending upward from the horizontal portion, the sleeve portion having an inner cavity for accommodating an elastic pressure mechanism, the horizontal portion is embedded in the opening of the lower cover, the sleeve portion extends upward to the lower surface of the upper cover, and the control board is located in a cavity formed by the upper cover, the intermediate shell, the lower cover and the sealing sleeve.
6. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 5, characterized in that: The elastic pressure mechanism includes a guide column, an inner retaining ring, a compression spring and an outer retaining ring. The guide column is fixedly connected to the upper cover. The inner retaining ring, the compression spring and the outer retaining ring are sequentially sleeved on the guide column from top to bottom. The temperature sensor is installed on the lower end surface of the outer retaining ring. The temperature sensor can move up and down along the guide column with the outer retaining ring.
7. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 6, characterized in that: The center of the guide column has an axial hole, the upper end of the guide column is locked and connected with the upper cover through a screw, and the connecting line of the temperature sensor passes through the axial hole of the guide column and is connected with the control board signal.
8. The wireless high heat absorption temperature recorder for vacuum drying oven temperature calibration according to claim 7, characterized in that: A stopper is provided at the lower end of the guide column for limiting the downward movement of the outer retaining ring to an extreme position.