CN117824879A - High-precision seawater constant temperature tank device - Google Patents
High-precision seawater constant temperature tank device Download PDFInfo
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- CN117824879A CN117824879A CN202410063851.4A CN202410063851A CN117824879A CN 117824879 A CN117824879 A CN 117824879A CN 202410063851 A CN202410063851 A CN 202410063851A CN 117824879 A CN117824879 A CN 117824879A
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- 239000013535 sea water Substances 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000002474 experimental method Methods 0.000 claims abstract description 21
- 230000003993 interaction Effects 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- 239000002826 coolant Substances 0.000 claims abstract description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 abstract description 11
- 238000005057 refrigeration Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The invention discloses a high-precision seawater thermostatic bath device, wherein a high-power heater, a low-power heating wire and a stirring impeller are arranged in a thermostatic bath main body; the water chilling unit is used for directly cooling water in the constant temperature tank main body and sending the water back to the inside of the constant temperature tank main body; the circulating bath is used for carrying out heat exchange and cooling on water in the constant-temperature tank main body by using a cooling medium, and providing a constant-temperature and constant-flow cold source for the constant-temperature tank main body; the surface of the thermostatic bath main body is also nested with a micro industrial personal computer, and the micro industrial personal computer comprises a man-machine interaction interface, a temperature control circuit board, a high-precision thermistor thermometer and a master switch. The high-precision seawater thermostatic bath device can automatically regulate and control water temperature, realize accurate temperature control of submK level, ensure constant temperature environment required in the calibration process of equipment such as a marine thermometer or a temperature and salt depth measuring instrument, and solve the problems of poor temperature fluctuation and temperature field uniformity, small working area, long temperature control experiment time, lower automation degree and the like of the conventional thermostatic seawater bath.
Description
Technical Field
The invention relates to the technical field of calibration of temperature measurement equipment, in particular to a high-precision seawater constant temperature tank device.
Background
The temperature is used as a key parameter for reflecting the ocean condition, and the accurate measurement of the ocean temperature is indispensable to the fields of national defense safety, climate change, resource development and the like. The sea water temperature is between-5 ℃ and 35 ℃, and for deep sea accounting for 90% of the total sea water volume, the temperature is quite constant in space due to the huge heat capacity, and the typical temperature variation in deep sea is estimated to be 1mK per ten years, namely the annual average variation is only about 0.1 mK. Such high quality hydrographic measurements not only require very stable temperature sensors, but also place extremely high demands on the measurement and metering technology. The temperature and salt depth measuring instrument is an indispensable key device for measuring the ocean temperature, and is an international mainstream temperature and salt depth measuring instrument, such as SBE 911 series of sea bird company in the United states, the diameter is about 33cm, the height is about 95cm, the requirements on the size of a working area of a constant temperature tank are large, and common constant temperature tanks in the market cannot be accommodated. In addition, according to the JJG763-2019 temperature and salt depth measuring instrument verification procedure, the calibration of the temperature and salt depth measuring instrument needs a high-precision seawater thermostatic bath as main matched equipment. The high-precision seawater thermostatic bath is used for simulating the actual marine working condition, providing a high-stability constant-temperature environment, and at least covering the temperature range from minus 2 ℃ to 40 ℃, wherein the temperature fluctuation degree and the temperature field uniformity are required to be better than 1mK so as to realize the accurate calibration of the temperature and salt depth measuring instrument.
The existing constant temperature tank is usually small in volume, is suitable for calibration of industrial temperature sensors such as platinum resistors, adopts an integrated structure, integrates a tank body, a temperature control system, a compressor, a heater and the like, and limits the capacity of accommodating large ocean temperature sensors. In large-volume thermostats, the working area is usually designed in the shape of a cube, with stirring blades arranged at the bottom or on the sides. Such a design may result in localized hot or cold spot areas within the oven, i.e. some areas with less than ideal temperature control, and other areas that are too sensitive to temperature changes. Such non-uniformity of temperature distribution may affect the consistency and accuracy of the measurements. This structural feature allows the region of constant temperature field to be the center of the working area, limiting the oven to accommodate only a single measuring device.
In addition, the existing thermostat heater wire and refrigeration system have relatively low refrigeration power, and require a long time to reach a steady state when adjusted to a new temperature point, and changes in thermostat temperature point (e.g., from-5 ℃ to 35 ℃) may take several hours. The part of the high-precision constant temperature tank adopts a main heater and a high-power cold water tank to quickly change temperature, and then a low-power auxiliary heater and a control Wen Fucao are used for accurately controlling the temperature. The high-power cold water tank is connected with the working area of the main tank, but the high-power cold water tank and the working area of the main tank are not communicated with each other, only a cold source is provided through a pipeline, refrigeration is carried out in a heat conduction mode, the refrigeration efficiency is limited, and the cooling time is long. The number of the quick heaters for quick heating is 3, and the heating rods are distributed discretely, so that the heating of the large-capacity tank body is easy to be uneven. A accuse temperature heater and assisting groove for controlling temperature all are located the constant temperature tank bottom, even cooperate stirring drainage, also easily cause vertical temperature field inhomogeneous in the space of great scope.
In addition, an independent cabinet is arranged in the existing constant temperature tank, a plurality of switch buttons are arranged, the operation is complex, the degree of automation is low, and the temperatures and the on-off time of main heating, auxiliary heating, main refrigeration and auxiliary refrigeration are required to be manually regulated and controlled according to different target temperatures. The requirements for personnel are high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a high-precision seawater constant temperature tank device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a high-precision seawater thermostatic bath device comprises a thermostatic bath main body, a water chilling unit and a circulation bath;
a high-power heater, a low-power heating wire and a stirring impeller are arranged in the constant temperature tank main body;
the water chiller and the circulating bath are communicated with the inside of the constant temperature tank main body through water pipes, and each water pipe is provided with an automatic valve; the water chilling unit is used for directly cooling water in the constant temperature tank main body and sending the water back to the inside of the constant temperature tank main body; the circulating bath is used for carrying out heat exchange and cooling on water in the constant-temperature tank main body by using a cooling medium, and providing a constant-temperature and constant-flow cold source for the constant-temperature tank main body;
the surface of the constant temperature tank main body is also nested with a micro industrial personal computer, the micro industrial personal computer comprises a man-machine interaction interface, a temperature control circuit board, a high-precision thermistor thermometer and a master switch, and the high-power heater, the low-power heating wire, the man-machine interaction interface, the high-precision thermistor thermometer, the master switch, the water chilling unit, the circulation bath and the automatic valve are all connected with the temperature control circuit board.
Further, the bottom of the constant temperature tank main body is provided with a universal wheel.
Further, the top of the constant temperature tank main body is opened, and a tank cover capable of being opened and closed is arranged.
Further, the constant temperature bath body has a cylindrical shape with an inner diameter of 0.7-1.2m.
Further, the low-power heating wire is arranged in a double-spiral structure; the high-power heater adopts a high-power flange type electric heater.
Further, the groove cover of the thermostatic bath main body adopts a four-flap structure.
Further, the water pipe and the thermostatic bath main body are made of titanium alloy materials.
Further, a mesh plate and a porous structure are arranged in the thermostatic bath main body; the mesh plate is arranged at the center position inside the thermostatic bath main body and is arranged at two sides of the low-power heating wire and the stirring impeller; the porous structure is arranged between the mesh plates at the two sides.
The invention also provides a single-point control method of the high-precision seawater thermostatic bath device, which comprises the following specific processes:
a1, a user sets a target temperature T on a temperature control circuit board through a man-machine interaction interface 0 The temperature control circuit board reads the internal temperature T of the current constant temperature tank main body through a high-precision thermistor thermometer n And self-setting by using self-setting functionDynamically setting PID parameters;
a2, the temperature control circuit board is kept in the internal temperature of the constant temperature tank main body within a target temperature range by matching the output duty ratio of the low-power heating wire and the temperature of the circulating bath; if |T 0 -T n The I is more than 1, and the temperature adjustment is judged to be needed by adopting a high-power heater or a water chilling unit; at this time, according to T 0 And T is n In relation to T 0 ＞T n Starting the high-power heater to realize rapid temperature rise; when it reaches |T 0 -T n |<0.5, closing the high-power heater; conversely, if T 0 ＜T n Starting the water chilling unit to realize rapid cooling until the temperature is |T 0 -T n And when the level is less than or equal to 1, the water chilling unit is closed.
The invention also provides a multipoint control method of the high-precision seawater thermostatic bath device, which comprises the following specific processes:
b1, setting target temperatures of a plurality of experiments and corresponding experiment duration and stability requirements by a user through a human-computer interaction interface according to experiment requirements;
b2, aiming at the target temperature of the first experiment, the temperature control circuit board completes the experiment of the corresponding set time length through single-point control, then automatically switches to the next target temperature, and repeats the single-point control process to complete the experiment of the corresponding set time length;
b3, giving a prompt by a human-computer interaction interface until all experiments are completed;
for each target temperature T 0 The single point control process of (2) is as follows:
the temperature control circuit board reads the internal temperature T of the current constant temperature tank main body through a high-precision thermistor thermometer n And automatically setting PID parameters by utilizing the self-tuning function;
the temperature control circuit board is used for keeping the internal temperature of the constant temperature tank main body within a target temperature range by matching the output duty ratio of the low-power heating wire and the temperature of the circulating bath; if |T 0 -T n The I is more than 1, and the temperature adjustment is judged to be needed by adopting a high-power heater or a water chilling unit; at this time, according to T 0 And T is n In relation to T 0 ＞T n Starting the high-power heater to realize rapid temperature rise; when it reaches |T 0 -T n |<0.5, closing the high-power heater; conversely, if T 0 ＜T n Starting the water chilling unit to realize rapid cooling until the temperature is |T 0 -T n And when the level is less than or equal to 1, the water chilling unit is closed.
The invention has the beneficial effects that: the high-precision seawater thermostatic bath device can automatically regulate and control water temperature, realize accurate temperature control of submK level and ensure constant temperature environment required in the calibration process of isothermal sensing equipment of a marine thermometer or a temperature and salt depth measuring instrument. The invention can effectively solve the problems of poor temperature control fluctuation and temperature field uniformity, small working area, long temperature control experiment time, low automation degree and the like of the conventional constant-temperature seawater tank.
Drawings
FIG. 1 is a schematic view showing the structure of a high-precision seawater thermostatic bath apparatus according to embodiment 1 of the present invention;
FIG. 2 is a flow chart of the method of embodiment 2 of the present invention;
fig. 3 is a flow chart of the method of embodiment 3 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present invention is not limited to the present embodiment.
Example 1
The embodiment provides a high-precision seawater constant temperature tank device, which is suitable for calibrating temperature sensing equipment such as a temperature and salt depth measuring instrument and a marine thermometer. The high-precision seawater thermostatic bath device can automatically adjust the water temperature, realize the temperature control precision of sub millikelvin (mK) level, and ensure the required constant temperature environment in the calibration process of temperature sensing equipment such as a temperature and salt depth measuring instrument and a marine thermometer.
As shown in fig. 1, the high-precision seawater thermostatic bath device comprises a thermostatic bath main body 4, a circulating bath 1 and a water chilling unit 16;
a high-power heater 5, a mesh plate 8, a low-power heating wire 9, a stirring impeller 10 and a porous structure 11 are arranged in the constant temperature tank main body 4;
the circulating bath 1 and the water chilling unit 16 are communicated with the inside of the constant temperature tank main body 4 through water pipes 2, and each water pipe 2 is provided with an automatic valve 3; the water chiller 16 is used for directly cooling water in the constant temperature tank main body 4 and sending the water back to the inside of the constant temperature tank main body 4; the circulation bath is used for carrying out heat exchange and cooling on water in the constant temperature tank main body 4 by using a cooling medium, and providing a constant temperature and constant flow cold source for the constant temperature tank main body 4;
the surface of the constant temperature tank main body 4 is also nested with a micro industrial personal computer, the micro industrial personal computer comprises a man-machine interaction interface 12, a temperature control circuit board 13, a high-precision thermistor thermometer 15 and a main switch 14, and the high-power heater 5, the low-power heating wire 9, the man-machine interaction interface 12, the high-precision thermistor thermometer 15, the main switch 14, the circulation bath 1, the water chilling unit 16 and the automatic valve 3 are all connected with the temperature control circuit board 13.
The working medium of the circulating bath is absolute ethyl alcohol, and the temperature of the working medium is 2-3 ℃ lower than that of water in the constant temperature tank main body. The water chilling unit has the refrigerating capacity of 20kW to the water circulation is directly participated in to the water chilling unit during operation, directly sends the water in the constant temperature tank main part 4 into the water chilling unit after beginning work and sends back in the constant temperature tank main part 4 after quick refrigeration, realizes the demand of quick reduction temperature.
Through setting up circulation bath and cooling water set, can start the cooling water set in the stage that needs quick cooling, realize the inside quick cooling of water of constant temperature tank main part, stop the cooling water set after reaching target temperature, make circulation bath continue to operate to maintain the inside temperature stability of constant temperature tank main part.
In this embodiment, the bottom of the thermostatic bath main body 4 is provided with a universal wheel 6, which facilitates the movement of the device.
In this embodiment, the top of the thermostatic bath body 4 is opened, and a openable and closable bath cover 7 is provided.
In this embodiment, the thermostat main body 4 adopts a cylindrical structural design, so that the annular flow of water flow is optimized, a large working area is created, a plurality of experiments can be performed at the same diameter level, and the use efficiency of the equipment is improved. The dimensions of the thermostatic bath body 4 may vary according to requirements, in this embodiment the internal diameter of the thermostatic bath body 4 is 0.7-1.2m, which dimensions allow for accommodating most commercially available marine thermometers as well as thermal salt depth gauges.
Further, in the present embodiment, the groove cover 7 of the thermostat main body 4 adopts a four-flap structure, which is convenient to open and close, and is suitable for simultaneously performing calibration work of a plurality of temperature and salt depth meters.
More specifically, the high-precision thermistor thermometer 15 employs a high-stability NTC thermistor with an annual drift of less than 1mK, and can measure temperature with a precision of 0.8mK (measurement range of-2 ℃ to 35 ℃, k=2). The high-precision thermistor thermometer 15 is installed at the central position inside the constant-temperature tank main body 4 and is matched with the temperature control circuit board 13 with high sampling frequency (more than 3 Hz) to realize real-time monitoring and control of the temperature inside the constant-temperature tank main body.
In this embodiment, the power of the low-power heating wire 9 is 2200w, which is set to be a double-spiral structure, and is regulated by an accurate PID control loop to realize temperature regulation and control of different degrees.
In the embodiment, the high-power heater 5 adopts a high-power flange type electric heater, the voltage is 380V, and the high-speed temperature rise can be realized.
By providing the high-power heater 5 and the low-power heater wire 9, the high-power heater 5 is activated at a stage where rapid temperature increase is required, and the high-power heater 5 is turned off when the target temperature is approached, so that fine temperature adjustment is continued by the low-power heater wire 9. By matching the output duty cycle of the low power heater wire with the appropriate energy of the circulating bath, stable maintenance of accurate temperature is achieved.
In this embodiment, the rotation speed of the stirring impeller 10 may be adjusted, so that a user may adjust the stirring strength according to the actual requirement, and ensure that the water can be uniformly mixed, thereby eliminating or reducing the temperature gradient caused by temperature stratification or local hot spots.
Further, in the present embodiment, the internal structural design of the thermostatic bath main body, in which the mesh plate 8 and the porous structure 11 are provided, takes into consideration the principle of fluid mechanics. The mesh plate 8 is arranged in the central position inside the thermostatic bath main body 4 and on the two sides of the low-power heating wire and the stirring impeller, and has the function of uniformly dispersing the flow velocity generated by the stirring impeller and preventing the water flow from directly impacting the inner wall of the thermostatic bath main body or generating larger vortex in the thermostatic bath main body; the porous structure 11 is arranged between the mesh plates 8 on two sides, so that water flow can be further ensured to be uniformly distributed in the whole constant temperature tank main body, and the liquid flow in the constant temperature tank main body maintains dynamic flow velocity, thereby effectively avoiding cold and hot end phenomena possibly occurring in a temperature field and ensuring that the temperature field in the whole constant temperature tank main body can be maintained in a very uniform state.
In this embodiment, the water pipe 2 and the thermostatic bath main body 4 are made of titanium alloy materials. Titanium alloys are known for their excellent corrosion resistance and are particularly suitable for use against the corrosive effects of the complex environment of seawater. The material selection not only prolongs the service life of the equipment, but also reduces the maintenance cost, and ensures the stability and the reliability of the seawater thermostatic bath device in the long-time operation process.
Example 2
The embodiment provides a single-point control method of the high-precision seawater thermostatic bath device in embodiment 1, and the specific process is shown in fig. 2.
First, a user sets a target temperature (T) on the temperature control circuit board 13 through the human-computer interaction interface 12 ( 0 ) The temperature control circuit board 13 reads the current internal temperature of the thermostatic bath main body (T) through the high-precision thermistor thermometer 15 n ) And automatically setting PID parameters by utilizing the self-tuning function;
subsequently, the temperature control circuit board 13 keeps the internal temperature of the thermostatic bath body 4 within the target temperature range by matching the output duty ratio of the low-power heating wire 9 and the temperature of the circulation bath 1; if |T 0 -T n The I is more than 1, and the temperature adjustment is judged to be needed by adopting a high-power heater 5 or a water chilling unit 16; at this time, according to T 0 And T is n In relation to T 0 ＞T n The high-power heater 5 is started to realize rapid temperature rise; when it reaches |T 0 -T n |<0.5, closing the high-power heater; conversely, if T 0 ＜T n Starting the water chilling unit to realize rapid cooling until the temperature is |T 0 -T n And when the level is less than or equal to 1, the water chilling unit is closed. The temperature control circuit board 13 can display the temperature curve and the real-time temperature standard deviation data (within 15 minutes) on the man-machine interaction interface 12 for the user to check.
Example 3
The embodiment provides a multipoint control method of the high-precision seawater thermostatic bath device in embodiment 1, and the specific process is as shown in fig. 3:
firstly, a user can set target temperatures of a plurality of experiments, corresponding experiment duration and stability requirements through a human-computer interaction interface 12 according to experiment requirements;
the temperature control circuit board 13 then reads the internal temperature T of the current thermostatic bath main body through the high-precision thermistor thermometer 15 n The internal temperature in the thermostatic bath main body was temperature-controlled to reach the first target temperature T according to the single-point control method described in example 2 01 And counting the standard deviation of the temperature data within 15 minutes;
at the first target temperature T 01 After the corresponding set experimental time period, the temperature control circuit board 13 is automatically switched to the next target temperature T 02 And start the process of single point control again;
the above process is repeated until the experiment is completed for each target temperature. At this time, the human-computer interaction interface provides a corresponding prompt.
Various modifications and variations of the present invention will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (10)
1. The high-precision seawater thermostatic bath device is characterized by comprising a thermostatic bath main body, a water chilling unit and a circulating bath;
a high-power heater, a low-power heating wire and a stirring impeller are arranged in the constant temperature tank main body;
the water chiller and the circulating bath are communicated with the inside of the constant temperature tank main body through water pipes, and each water pipe is provided with an automatic valve; the water chilling unit is used for directly cooling water in the constant temperature tank main body and sending the water back to the inside of the constant temperature tank main body; the circulating bath is used for carrying out heat exchange and cooling on water in the constant-temperature tank main body by using a cooling medium, and providing a constant-temperature and constant-flow cold source for the constant-temperature tank main body;
the surface of the constant temperature tank main body is also nested with a micro industrial personal computer, the micro industrial personal computer comprises a man-machine interaction interface, a temperature control circuit board, a high-precision thermistor thermometer and a master switch, and the high-power heater, the low-power heating wire, the man-machine interaction interface, the high-precision thermistor thermometer, the master switch, the water chilling unit, the circulation bath and the automatic valve are all connected with the temperature control circuit board.
2. The high precision seawater thermostatic bath apparatus of claim 1, wherein the bottom of the thermostatic bath body is provided with universal wheels.
3. The high-precision seawater thermostatic bath apparatus according to claim 1, wherein the top of the thermostatic bath main body is opened and provided with a openable and closable bath cover.
4. The high-precision seawater thermostatic bath apparatus according to claim 1, wherein the thermostatic bath main body has a cylindrical shape with an inner diameter of 0.7-1.2m.
5. The high-precision seawater thermostatic bath apparatus according to claim 1, wherein the low-power heating wire is provided in a double-screw structure; the high-power heater adopts a high-power flange type electric heater.
6. A high-precision seawater thermostatic bath apparatus according to claim 3, wherein the bath cover of the thermostatic bath main body adopts a four-flap structure.
7. The high precision seawater thermostatic bath apparatus of claim 1 wherein the water tube and the thermostatic bath body are each made of a titanium alloy material.
8. The high-precision seawater thermostatic bath apparatus according to claim 1, wherein a mesh plate and a porous structure are provided inside the thermostatic bath main body; the mesh plate is arranged at the center position inside the thermostatic bath main body and is arranged at two sides of the low-power heating wire and the stirring impeller; the porous structure is arranged between the mesh plates at the two sides.
9. A single point control method of the high-precision seawater thermostatic bath device according to any one of claims 1 to 8, which is characterized by comprising the following specific steps:
a1, a user sets a target temperature T on a temperature control circuit board through a man-machine interaction interface 0 The temperature control circuit board reads the internal temperature T of the current constant temperature tank main body through a high-precision thermistor thermometer n And automatically setting PID parameters by utilizing the self-tuning function;
a2, the temperature control circuit board is kept in the internal temperature of the constant temperature tank main body within a target temperature range by matching the output duty ratio of the low-power heating wire and the temperature of the circulating bath; if |T 0 -T n The I is more than 1, and the temperature adjustment is judged to be needed by adopting a high-power heater or a water chilling unit; at this time, according to T 0 And T is n In relation to T 0 ＞T n Starting the high-power heater to realize rapid temperature rise; when it reaches |T 0 -T n |<0.5, closing the high-power heater; conversely, if T 0 ＜T n Starting the water chilling unit to realize rapid cooling until the temperature is |T 0 -T n And when the level is less than or equal to 1, the water chilling unit is closed.
10. A multipoint control method of the high-precision seawater thermostatic bath device according to any one of claims 1 to 8, which is characterized by comprising the following specific steps:
b1, setting target temperatures of a plurality of experiments and corresponding experiment duration and stability requirements by a user through a human-computer interaction interface according to experiment requirements;
b2, aiming at the target temperature of the first experiment, the temperature control circuit board completes the experiment of the corresponding set time length through single-point control, then automatically switches to the next target temperature, and repeats the single-point control process to complete the experiment of the corresponding set time length;
b3, giving a prompt by a human-computer interaction interface until all experiments are completed;
for each target temperature T 0 The single point control process of (2) is as follows:
the temperature control circuit board reads the internal temperature T of the current constant temperature tank main body through a high-precision thermistor thermometer n And automatically setting PID parameters by utilizing the self-tuning function;
the temperature control circuit board is used for keeping the internal temperature of the constant temperature tank main body within a target temperature range by matching the output duty ratio of the low-power heating wire and the temperature of the circulating bath; if |T 0 -T n The I is more than 1, and the temperature adjustment is judged to be needed by adopting a high-power heater or a water chilling unit; at this time, according to T 0 And T is n In relation to T 0 ＞T n Starting the high-power heater to realize rapid temperature rise; when it reaches |T 0 -T n |<0.5, closing the high-power heater; conversely, if T 0 ＜T n Starting the water chilling unit to realize rapid cooling until the temperature is |T 0 -T n And when the level is less than or equal to 1, the water chilling unit is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410063851.4A CN117824879A (en) | 2024-01-17 | 2024-01-17 | High-precision seawater constant temperature tank device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410063851.4A CN117824879A (en) | 2024-01-17 | 2024-01-17 | High-precision seawater constant temperature tank device |
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| Publication Number | Publication Date |
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| CN117824879A true CN117824879A (en) | 2024-04-05 |
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| CN202410063851.4A Pending CN117824879A (en) | 2024-01-17 | 2024-01-17 | High-precision seawater constant temperature tank device |
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- 2024-01-17 CN CN202410063851.4A patent/CN117824879A/en active Pending
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