Automatic constant-temperature calibration device
By incorporating cold and hot oil tanks and a serpentine copper pipe refrigerant system into the temperature calibration device, combined with automated control, the problems of large temperature fluctuations and low measurement efficiency were solved, achieving efficient and accurate temperature measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-17
- Publication Date
- 2026-04-07
AI Technical Summary
Existing temperature calibration devices suffer from problems such as large temperature fluctuations, low measurement efficiency, low automation, and excessively high temperatures after prolonged operation, which prevents measurements from being performed.
The system employs a dual-tank design, with separate cold and hot oil tanks. Oil exchange is achieved via a pressure pump, and a combination of a disc-shaped heating element and a serpentine copper tube refrigerant system ensures stable temperature within the constant-temperature oil bath. Furthermore, the temperature is automatically adjusted via a temperature measurement module and controller, enabling automated measurement.
It achieves small temperature fluctuations, high measurement efficiency, high degree of automation, accurate measurement results, reduces human intervention errors, and improves measurement accuracy and efficiency.
Smart Images
Figure CN121804705A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a temperature measuring device, and more specifically, to an automated constant temperature calibration device. Background Technology
[0002] Thermometers have a wide range of uses in daily life and production. There are many types of thermometers, and their range and function vary depending on the type of signal they provide. In some areas, a high degree of precision is required for thermometers. If the measurement results of a thermometer are significantly inaccurate, it can have a serious impact on production. Therefore, there is a need for a large-scale, high-precision instrument that can measure multiple types of thermometers.
[0003] Currently, although calibration devices on the market can measure the temperature of thermometers, the temperature fluctuates greatly during the measurement process, requiring manual data comparison, resulting in low measurement efficiency and large errors in the measurement results. In addition, after running for a long time, the machine temperature rises, making it impossible to perform measurements, which greatly reduces the measurement efficiency. Summary of the Invention
[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automated constant temperature calibration device with small temperature fluctuations, high measurement efficiency and high degree of automation.
[0005] To achieve the above objectives, the present invention provides the following technical solution: an automated constant temperature calibration device, comprising a body, a constant temperature oil tank disposed on the upper end of the body, multiple oil storage tanks disposed within the body, and a temperature measuring module. Each oil storage tank is equipped with a pressure pump. The oil storage tanks are connected to the constant temperature oil tank via pipelines. The oil storage tanks include a cold oil tank and a hot oil tank, and the cold oil tank and the hot oil tank can exchange liquids. The water pump of the cold oil tank can also be connected to an external oil tank.
[0006] By adopting the above technical solution, the oil in the oil storage tank is pumped into the constant temperature oil bath to provide a temperature measurement environment. The pressure pump exchanges the liquid inside the constant temperature oil bath. The oil storage tank is divided into cold and hot oil tanks. The water pump of the cold oil tank can be connected to an external oil tank to prevent the oil temperature from rising during long-term operation and affecting the measurement. The hot oil is cooled while running, which improves the efficiency of the work.
[0007] The invention is further configured such that: the constant temperature oil tank also includes an end cap at the top, the end cap having several through holes for inserting thermometers, the thermometers being electrically connected to one end of a temperature measuring module, and the other end of the temperature measuring module having a display for displaying the temperature of the thermometers; the constant temperature oil tank also has a heating tube for heating the liquid inside, the heating tube having a disc-shaped multi-layer structure and being located on the periphery of the inner wall of the constant temperature oil tank; the bottom of the end cap also has a stirrer; a refrigerant tank is also provided between the constant temperature oil tank and the oil storage tank, the refrigerant tank containing copper pipes and refrigerant for cooling, one end of the copper pipes being connected to the oil storage tank and the other end being connected to the constant temperature oil tank; the copper pipes in the refrigerant tank being arranged in a serpentine pattern within the refrigerant tank; and a heat dissipation plate is also provided on the side of the machine body.
[0008] By adopting the above technical solution, the constant temperature oil bath is heated by a disc-shaped heating tube, resulting in rapid and uniform temperature rise. An agitator on the end cap is used to stir the oil, preventing uneven temperature distribution. A refrigerant tank is also provided between the constant temperature oil bath and the oil storage tank. This refrigerant tank cools the oil as it flows from the constant temperature oil bath into the oil storage tank. The copper tubes are arranged in a serpentine pattern within the refrigerant tank, significantly improving cooling efficiency and preventing the oil temperature from rising and preventing measurement failure. The thermometer measurement results are measured by the temperature measurement module and directly displayed on the monitor, resulting in high measurement efficiency. Measurement errors can be analyzed and compared through the module, reducing errors from manual comparison and improving accuracy. The control module can input signal types from various thermometers, allowing simultaneous measurement of different types of thermometers. A heat dissipation plate is also provided on the side of the machine to prevent excessive internal temperature from affecting the refrigerant's cooling effect.
[0009] The controller in the control method of the present invention includes a temperature control module for adjusting the temperature inside the constant temperature oil tank; a temperature measurement module for measuring the temperature of the constant temperature oil bath; a stirring module for stirring the liquid in the temperature-controlled oil bath; a timing module for measuring the working time of each module; and a detection module for detecting the thermometer under test. The control method includes the following steps: S1: Insert the thermometers to be tested into the through holes of the constant temperature oil bath end cap in sequence, and set the signal type of the thermometers to be tested on the display according to the corresponding numbers; S2: Start the device; the temperature control module adjusts the oil temperature in the constant temperature oil bath for a period of T. t ; S3: Time T elapsed t Then, the temperature measured by the temperature measuring module is W; S4: During continuous operation, the set temperature range of the constant temperature oil bath is W. Max -W Min When the detection module starts running, it jumps to S8; S5: When W < W Min or WMax <W, start the stirring module to stir the constant temperature oil tank for a time of T. j ; S6: Time T elapsed j Subsequently, the temperature of the constant temperature oil bath was measured to be W. a ; S7: When W Min ≤W a ≤W Max The detection module starts running; S8: Start the detection module, immerse the temperature to be measured into the constant temperature oil bath, and the immersion time is T. S ; S9: Time T S Then, the temperature of the thermometer under test was measured to be W. C ; S10: When W Min ≤W c ≤W Max Export the results to the display. S11: When W Max <W c At that time, the stirring module is started to stir the constant temperature oil tank for a stirring time of T. b ; S12: Time T elapsed b Subsequently, the temperature of the constant temperature oil bath was measured to be W. b ; S13: When W Min ≤W c ≤W Max Export the results to the display. S14: When W Max <W b Start the oil tank, replace the oil in the constant temperature oil bath, and simultaneously start the temperature control module to adjust the temperature. The adjustment time is T. z ; S15: Time T elapsed z Then, the temperature of the thermometer under test was measured to be W. d ; S16: W d <W Min or W Max <W d Export the results to the monitor and display "Unacceptable". S17: When W Min ≤W d ≤W Max Export the results to the monitor and display "Pass".
[0010] By adopting the above technical solution, the temperature measurement module can automatically detect the temperature in the constant temperature oil bath and adjust the temperature by turning on or off the heating tube or refrigerant according to the temperature, so that the temperature in the constant temperature oil bath remains constant, reducing the difficulty of detection. At the same time, the accuracy of the thermometer can be further tested by adjusting the temperature in the constant temperature oil bath. Moreover, the machine is less affected by the number of thermometer measurements, and the measurement results are highly accurate. The display can automatically display unqualified thermometers by comparing the measurement results, without the need for manual intervention, and the degree of automation is high. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of an automated constant temperature calibration device according to the present invention; Figure 2 This is a schematic diagram of the structure of the constant temperature oil bath of the automated constant temperature calibration device of the present invention; Figure 3 This invention relates to an automated constant temperature calibration device; The attached diagram is labeled as follows: 1. Machine body; 2. Thermostatic oil tank; 3. Oil reservoir; 4. Pressure pump; 5. End cap; 6. Through hole; 7. Heating tube; 8. Stirrer; 9. Refrigerant tank; 10. Copper pipe; 11. Heat dissipation plate. Implementation
[0012] Reference Figures 1 to 3 The present invention provides a further description of an automated constant temperature calibration device.
[0013] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0014] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.
[0015] An automated constant-temperature calibration device includes a main body, a constant-temperature oil bath located at the top of the main body, multiple oil storage tanks located within the main body, and a temperature measuring module. Each oil tank is equipped with a pressure pump. The oil storage tanks are connected to the constant-temperature oil bath via pipelines. Oil from the storage tanks enters the constant-temperature oil bath via the pressure pumps. Each oil storage tank contains both cold and hot oil tanks. During long-term operation, if the oil temperature becomes too high, the hot oil can be exchanged with the oil in the cold oil tank, improving measurement efficiency. The oil storage tanks include both cold and hot oil tanks. The cold oil tank and hot oil tank can exchange liquids, and the water pump of the cold oil tank can be connected to an external oil tank, further improving working efficiency. The constant temperature oil tank also includes an end cap at the top, with several through holes for inserting thermometers. The thermometers are electrically connected to one end of the temperature measuring module, and the other end of the temperature measuring module has a display for displaying the thermometer temperature. The temperature measuring module can input different thermometer signal types, can measure the thermometers individually and record the data automatically, preventing errors caused by human intervention. The measurement accuracy and efficiency are high, and the display can automatically display unqualified thermometers by comparing the measurement results, resulting in a high degree of automation. The constant temperature oil tank also has heating tubes inside for heating the liquid in the tank. The heating tubes are located on the inner wall of the constant temperature oil tank and have a disc-shaped multi-layer structure. The constant temperature oil tank is heated by the disc-shaped heating tubes, resulting in rapid temperature rise and uniform heating. A stirrer is also provided at the bottom of the end cap to prevent uneven oil temperature from affecting the measurement results during heating. A refrigerant tank is also provided between the constant temperature oil tank and the oil storage tank. The refrigerant tank contains copper pipes and refrigerant for cooling. One end of the copper pipe is connected to the oil storage tank, and the other end is connected to the constant temperature oil bath. The copper pipes in the refrigerant tank are arranged in a serpentine pattern, which cools the oil during circulation, making the oil cool faster. The serpentine arrangement of the copper pipes and the refrigerant has a large contact area and a long contact time, resulting in high resource utilization. The side of the machine body is also equipped with a heat dissipation plate, which can dissipate heat from the machine body during operation, prevent heat accumulation inside the machine body from affecting the temperature of the oil in the oil storage tank, and further improve the heat dissipation efficiency.
[0016] Combination Figure 3 The control method is further elaborated, wherein the temperature range of the constant temperature oil bath is set to W. Max -W Min The control method is implemented by a controller installed inside the machine body. The controller includes a temperature control module for adjusting the temperature inside the constant temperature oil tank; a temperature measurement module for measuring the temperature of the constant temperature oil bath; a stirring module for stirring the liquid in the temperature-controlled oil bath; a timing module for measuring the working time of each module; and a detection module for detecting the thermometer under test.
[0017] The control method includes the following steps: S1: Insert the thermometers to be tested into the through holes of the constant temperature oil tank end cap in sequence, and set the signal type of the thermometers to be tested on the display according to the corresponding numbers; S2: Start the device; the temperature control module adjusts the oil temperature in the constant temperature oil bath for a period of T. t ; S3: Time T elapsed t Then, the temperature measured by the temperature measuring module is W; S4: During continuous operation, the set temperature range of the constant temperature oil bath is W. Max -W Min When the detection module starts running, it jumps to S8; S5: When W < W Min or W Max <W, start the stirring module to stir the constant temperature oil tank for a time of T. j ; S6: Time T elapsed j Subsequently, the temperature of the constant temperature oil bath was measured to be W. a ; S7: When W Min ≤W a ≤W Max The detection module starts running; S8: Start the detection module, immerse the temperature to be measured into the constant temperature oil bath, and the immersion time is T. S ; S9: Time T S Then, the temperature of the thermometer under test was measured to be W. C ; S10: When W Min ≤W c ≤W Max Export the results to the display. S11: When W Max <W c At that time, the stirring module is started to stir the constant temperature oil tank for a stirring time of T. b ; S12: Time T elapsed b Subsequently, the temperature of the constant temperature oil bath was measured to be W. b ; S13: When W Min ≤W c ≤W Max Export the results to the display. S14: When W Max <W b Start the oil tank, replace the oil in the constant temperature oil bath, and simultaneously start the temperature control module to adjust the temperature. The adjustment time is T. z ; S15: Time T elapsed z Then, the temperature of the thermometer under test was measured to be W. d ; S16: Wd <W Min or W Max <W d Export the results to the monitor and display "Unacceptable". S17: When W Min ≤W d ≤W Max Export the results to the monitor and display "Pass".
[0018] Before starting the device, connect the thermometer to be measured to the detection module and set the corresponding signal type to prevent measurement errors. After the device is turned on, the oil in the oil tank enters the constant temperature oil bath through a pressure pump. Since the oil temperature is not within the set temperature range, at T... t At the time end, the temperature of the oil in the constant temperature oil bath is controlled by a temperature control device, and after T... t If, after a certain period of time, the oil temperature deviates from the set temperature, the cause is generally uneven oil temperature. Therefore, at T... j The oil is stirred for a period of time, at T j After a certain time, if the oil temperature remains within the set range, the detection phase begins. Since the thermometer requires a certain amount of time to measure the temperature, it needs to be immersed in T... s Time ensures the accuracy of the thermometer. After measurement, if the result temperature differs significantly from the standard temperature, the specific reason is uneven liquid temperature in the constant temperature oil bath or excessively high oil temperature in the oil storage tank. The oil is exchanged by a pressure pump, and the temperature control module is activated to adjust the oil temperature. The temperature to be measured is also detected. After multiple comparison tests, the precision of the result is high. If the measurement result differs significantly from the standard result, "unqualified" will be displayed next to the thermometer; otherwise, "qualified" will be displayed.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.
Claims
1. An automated constant temperature calibration device, characterized in that, The system includes a body (1), a constant temperature oil tank (2) located at the top of the body (1), multiple oil storage tanks (3) located inside the body (1), and a temperature measuring module. Each oil tank is equipped with a pressure pump (4). The oil storage tank (3) is connected to the constant temperature oil tank (2) through a pipe. The constant temperature oil tank (2) also includes an end cap (5) located at the top. The end cap (5) has several through holes (6) for inserting thermometers. The thermometer is electrically connected to one end of the temperature measuring module. The other end of the temperature measuring module is equipped with a display for displaying the temperature of the thermometer. The constant temperature oil tank (2) is also equipped with a heating pipe (7) for heating the liquid in the oil tank.
2. The automated constant temperature calibration device according to claim 1, characterized in that, The heating tube (7) is located on the inner wall of the constant temperature oil tank (2), and the heating tube (7) has a disc-shaped multi-layer structure. The bottom of the end cap (5) is also provided with a stirrer (8) to keep the temperature uniform during heating.
3. The automated constant temperature calibration device according to claim 1, characterized in that, A refrigerant tank (9) is also provided between the constant temperature oil tank (2) and the oil storage tank (3). The refrigerant tank (9) contains copper pipes (10) and refrigerant for cooling. One end of the copper pipe (10) is connected to the oil storage tank (3), and the other end is connected to the constant temperature oil tank (2). The copper pipes (10) in the refrigerant tank (9) are arranged in a serpentine pattern inside the refrigerant tank (9).
4. The automated constant temperature calibration device according to claim 1, characterized in that, The oil storage tank (3) includes a cold oil tank and a hot oil tank, and the cold oil tank and the hot oil tank can exchange liquids.
5. An automated constant temperature calibration device according to claim 4, characterized in that, The water pump for the cold oil tank can be connected to an external oil tank.
6. The automated constant temperature calibration device according to claim 1, characterized in that, The body (1) has a heat dissipation plate (11) on its side.
7. A control method for an automated constant temperature calibration device according to claim 1, characterized in that, It also includes a controller, which includes a temperature control module for adjusting the temperature inside the constant temperature oil tank; a temperature measurement module for measuring the temperature of the constant temperature oil bath (2); a stirring module for stirring the liquid inside the temperature control oil bath; and a timing module for measuring the working time of each module. The detection module is used to detect the thermometer under test, and the control method includes the following steps: S1: Insert the thermometers to be tested into the through holes of the constant temperature oil bath end cap in sequence, and set the signal type of the thermometers to be tested on the display according to the corresponding numbers; S2: Start the device; the temperature control module adjusts the oil temperature in the constant temperature oil bath for a period of T. t ; S3: Time T elapsed t Then, the temperature measured by the temperature measuring module is W; S4: During continuous operation, the set temperature range of the constant temperature oil bath is W. Max -W Min , When the detection module starts running and jumps to S8; S5: When W < W Min or W Max <W, start the stirring module to stir the constant temperature oil tank. The stirring time is T. j ; S6: Time T elapsed j Subsequently, the temperature of the constant temperature oil bath was measured to be W. a ; S7: When W Min ≤W a ≤W Max The detection module starts running; S8: Start the detection module, immerse the temperature to be measured into the constant temperature oil bath, and the immersion time is T. S ; S9: Time T S Then, the temperature of the thermometer under test was measured to be W. C ; S10: When W Min ≤W c ≤W Max Export the results to the display. S11: When W Max <W c At that time, the stirring module is started to stir the constant temperature oil tank for a stirring time of T. b ; S12: Time T elapsed b Subsequently, the temperature of the constant temperature oil bath was measured to be W. b ; S13: When W Min ≤W c ≤W Max Export the results to the display. S14: When W Max <W b Start the oil tank, replace the oil in the constant temperature oil bath, and simultaneously start the temperature control module to adjust the temperature. The adjustment time is T. z ; S15: Time T elapsed z Then, the temperature of the thermometer under test was measured to be W. d ; S16: W d <W Min or W Max <W d Export the results to the monitor and display "Unacceptable". S17: When W Min ≤W d ≤W Max Export the results to the monitor and display "Pass".