CN210441447U - Temperature control device and system - Google Patents
Temperature control device and system Download PDFInfo
- Publication number
- CN210441447U CN210441447U CN201921614184.5U CN201921614184U CN210441447U CN 210441447 U CN210441447 U CN 210441447U CN 201921614184 U CN201921614184 U CN 201921614184U CN 210441447 U CN210441447 U CN 210441447U
- Authority
- CN
- China
- Prior art keywords
- temperature
- pipeline
- temperature sensor
- fluid
- heating assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Temperature (AREA)
Abstract
The utility model provides a temperature control device and system relates to temperature control technical field. The device is wound on the outer side of a pipeline through a heating assembly, and a phase-change heat storage material is filled between the heating assembly and the pipeline; the first temperature sensor is arranged on the inner wall of the pipeline and used for measuring the temperature of fluid in the pipeline; the second temperature sensor is arranged on the outer wall of the heating assembly and used for measuring the external environment temperature of the fluid outside the pipeline; control circuit and heating element, radiator unit, first temperature sensor, the equal electricity of second temperature sensor is connected, after the fluid entering pipeline of needs accuse temperature, when needs intensification or cooling, according to the fluid temperature of setting for temperature and first temperature sensor measuring, control circuit can drive heating element or radiator unit work to through the auxiliary action of second temperature sensor and phase transition heat-retaining material, can avoid the emergence that actual temperature can surpass the temperature setting phenomenon at the fluidic temperature control in-process.
Description
Technical Field
The utility model relates to a temperature control technical field, in particular to temperature control device and system.
Background
The temperature represents the cold and hot degree of an object, the definition of which is given by thermodynamics, and the temperature control device has close relation with human life, industrial and agricultural production and scientific research, and almost no production process and scientific research which do not require temperature control exist, so the temperature control device is widely applied to the fields of metallurgical industry, chemical production, electric power engineering, paper making industry, mechanical manufacturing, food processing and the like.
The conventional temperature control device is mainly based on a proportional-integral-derivative (PID) circuit, and the PID circuit controls the temperature control device to reach a preset temperature value.
However, in the conventional PID circuit-based temperature control device, because the principle of PID control is hysteresis control, taking a temperature rise process as an example, only when the actual temperature of the temperature control device is measured to exceed or is about to exceed the set temperature, the heating power is reduced, and at this time, the heating unit still transmits heat, so that the actual temperature exceeds the set temperature, and a temperature runaway phenomenon exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a temperature control device and system to the not enough among the above-mentioned prior art for solve among the prior art temperature control process actual temperature can exceed the problem of setting for the temperature.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides a temperature control device, including: the device comprises a pipeline, a heating assembly, a heat dissipation assembly, a first temperature sensor, a second temperature sensor and a control circuit; the heating assembly is wound on the outer side of the pipeline, and a phase-change heat storage material is filled between the heating assembly and the pipeline; the first temperature sensor is arranged on the inner wall of the pipeline; the second temperature sensor is arranged on the outer wall of the heating assembly; the control circuit is electrically connected with the heating assembly, the heat dissipation assembly, the first temperature sensor and the second temperature sensor.
Optionally, the phase-change heat storage material includes paraffin, alloy powder, and graphite.
Optionally, the filling thickness of the phase-change heat storage material between the heating assembly and the pipeline is 0.5-10 mm.
Optionally, the heating component is a resistance wire, and the resistance wire is wound on the outer side of the pipeline.
Optionally, the resistance wires are arranged outside the pipeline in a net shape, a grid shape or a parallel shape.
Optionally, the heat dissipation assembly is a heat dissipation fan, and the control circuit is configured to drive the heat dissipation fan to operate.
Optionally, the conduit is a serpentine conduit.
Optionally, the first temperature sensors include a plurality of first temperature sensors, and the plurality of first temperature sensors are uniformly distributed on the inner wall of the pipeline.
Optionally, the second temperature sensors include a plurality of second temperature sensors, and the plurality of second temperature sensors are uniformly distributed on the outer wall of the heating assembly.
In a second aspect, the embodiment of the present invention further provides a temperature control system, which includes the temperature control device of the first aspect.
The utility model has the advantages that:
in the temperature control device and the temperature control system provided by the embodiment of the utility model, the heating component is wound outside the pipeline, and a phase-change heat storage material is filled between the heating component and the pipeline; the first temperature sensor is arranged on the inner wall of the pipeline and used for measuring the temperature of fluid in the pipeline; the second temperature sensor is arranged on the outer wall of the heating assembly and used for measuring the external environment temperature of the fluid outside the pipeline; the control circuit is electrically connected with the heating assembly, the heat dissipation assembly, the first temperature sensor and the second temperature sensor, after fluid needing temperature control enters the pipeline, the first temperature sensor can measure the temperature of the fluid, when the temperature needs to be raised, the control circuit can drive the heating assembly to heat and raise the temperature according to the temperature measured by the first temperature sensor and the set temperature, the control circuit can adjust the heating power of the heating assembly according to the temperature of the first temperature sensor and the temperature of the second temperature sensor, and when the preset target temperature is reached, the phase-change heat storage material can absorb residual heat continuously emitted due to control lag; when needs cooling, according to the temperature that first temperature sensor measured and settlement temperature, phase transition heat-retaining material can absorb fluidic heat, when the fluidic temperature of pipeline reaches the settlement temperature, control circuit can drive radiator unit work, the heat of storing in the phase transition heat-retaining material can be distributed, and according to first temperature sensor's temperature and second temperature sensor's temperature, control circuit can adjust radiator unit's radiating power, rely on the inside heat diffusion of phase transition heat-retaining material slowly with the fluidic constancy of temperature in the pipeline at preset temperature, can avoid the emergence that actual temperature can surpass the settlement temperature phenomenon at the temperature control in-process of fluidic intensification or cooling.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic side view of a temperature control device according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a temperature control device according to an embodiment of the present invention.
Icon: 1-a pipeline; 2-phase change heat storage material; 3-a heating assembly; 4-a heat dissipation assembly; 5-a second temperature sensor; 6-first temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Fig. 1 is a schematic side view of a temperature control device according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional structure view of a temperature control device according to an embodiment of the present invention. As shown in fig. 1 and 2, the apparatus includes: the pipeline 1, the heating component 3, the heat dissipation component 4, the first temperature sensor 6, the second temperature sensor 5 and a control circuit (not shown).
The heating component 3 is wound on the outer side of the pipeline, and a phase-change heat storage material 2 is filled between the heating component 3 and the pipeline 1; the first temperature sensor 6 is arranged on the inner wall of the pipeline; the second temperature sensor 5 is arranged on the outer wall of the heating component 3; the control circuit is electrically connected with the heating component 3, the heat dissipation component 4, the first temperature sensor 6 and the second temperature sensor 5.
The pipe 1 may be a circular pipe, a square pipe, or the like, and the sectional shape of the pipe 1 is not limited in this application, but the length and the diameter of the pipe 1 are not limited in this application, and may be selected according to actual needs. According to the flow direction of fluid in the pipeline 1, the pipeline 1 can be divided into a pipeline inlet and a pipeline outlet, fluid needing temperature control can flow in from the pipeline inlet, and can exchange heat with the pipe wall when flowing in the pipeline 1, and when flowing out from the pipeline outlet, the required temperature can be achieved.
The first temperature sensor 6 is arranged on the inner wall of the pipeline, is directly contacted with the fluid in the pipeline cavity and is used for measuring the temperature of the fluid in the pipeline cavity, optionally, a screw socket can be adopted to be fixed on the inner wall of the pipeline, the first temperature sensor 6 can be a temperature sensor with good sealing performance and high precision, wherein the good sealing performance can avoid the situation that the first temperature sensor 6 is damaged by contacting with the fluid, optionally, the surface of a sensor probe of the first temperature sensor 6 can be treated by a polytetrafluoroethylene coating to enhance the corrosion resistance of the sensor probe; the high accuracy may allow a more accurate fluid temperature to be measured using the first temperature sensor 6.
The heating component 3 is electrically connected with the control circuit and is used for heating the fluid in the pipeline cavity; the heat dissipation assembly 4 is electrically connected with the control circuit and used for cooling fluid in the pipeline cavity, wherein the heating assembly 3 can be a resistance wire, an electric heating pipe and the like and is wound on the outer side of the pipeline, the heat dissipation assembly 4 can be an electric fan, a ventilation fan and the like and is arranged on the side surface of the pipeline 1, specific units of the heating assembly 3 and the heat dissipation assembly 4 are not limited in the application, and the heat dissipation assembly can be selected automatically according to actual application scenes.
The control circuit may obtain temperature parameters acquired by the first temperature sensor 6 and the second temperature sensor 5, and drive the heating component 3 or the heat dissipation component 4 to work to raise or lower temperature according to the temperature parameters and the temperature set by the fluid requiring temperature control, and optionally, the control circuit may be implemented based on a microprocessor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Controller (PLC), a PID Controller, and the like, which is not limited herein.
The phase-change heat storage material 2 has a phase-change point, can absorb and store process waste heat when the temperature reaches the phase-change point, can release the waste heat when needed, and can be formed by mixing paraffin, alloy powder, graphite and the like according to a certain proportion.
The process of controlling the temperature of the fluid in the pipeline 1 by the phase-change heat storage material 2 in the temperature control device is as follows, taking the temperature rise process as an example, the working process is as follows: control circuit is connected with heating element 3 electricity, can drive heating element 3 work, when heating element 3 heats to the settlement temperature (phase transition point of phase transition heat-retaining material 2), the control lags the residual heat that continues to give off and can be absorbed by phase transition heat-retaining material 2, and because phase transition heat-retaining material 2 can change through self phase place and store and release the heat, the temperature of material self at this in-process almost maintains unchangeably, can realize the accurate accuse temperature on the target temperature point, and can be when the temperature to the fluid of being accuse temperature takes place the rapid change, phase transition heat-retaining material 2 can carry out the temperature/heat rapid compensation between fluid and the settlement temperature, the interference killing feature of constant temperature effect is strong.
For example, when the diameter of the pipe cavity is 6mm, the total length is 2.5m, and the fluid in the pipe 1 is water, the temperature of the water in the pipe 1 measured by the first temperature sensor 6 is 40 ℃, and the water in the pipe 1 needs to be controlledThe temperature of the phase-change heat storage material 2 is 60 ℃, and the molecular formula of the main component of the paraffin is C28H58The mass fraction is 71.5%, the mass fraction of the metal copper is 8.5%, the mass fraction of the graphite is 20%, the heating component 3 can be driven to work through the control circuit in the heating process according to the set temperature, the temperature of the water in the pipeline 1 is heated, when the temperature of the water in the pipeline 1 measured by the first temperature sensor 6 reaches the phase change point (60 ℃) of the phase change heat storage material 2, the heat emitted by the heating component 3 is absorbed, the heat which is not absorbed is absorbed by the fluid, the heat received by the fluid is greatly reduced, and the temperature of the fluid does not exceed the set 60 ℃.
In summary, in the temperature control device provided by the present application, the heating element is wound around the outside of the pipeline, and a phase change heat storage material is filled between the heating element and the pipeline; the first temperature sensor is arranged on the inner wall of the pipeline; the second temperature sensor is arranged on the outer wall of the heating assembly; the control circuit is electrically connected with the heating assembly, the heat dissipation assembly, the first temperature sensor and the second temperature sensor, after fluid needing temperature control enters the pipeline, the first temperature sensor can measure the temperature of the fluid, when the temperature needs to be raised, the control circuit can drive the heating assembly to heat and raise the temperature according to the measured temperature and the set temperature, the control circuit can adjust the heating power of the heating assembly by measuring the temperature of the first temperature sensor and the temperature of the second temperature sensor, and when the preset target temperature is reached, the phase-change heat storage material can absorb residual heat continuously diffused due to control lag, so that the aim of accurately controlling the temperature is fulfilled; when needs cooling, according to first temperature sensor's the temperature that measures and settlement temperature, phase transition heat-retaining material can absorb fluidic heat, when reaching a certain temperature, control circuit can drive radiator unit work and cool down, and through the temperature of measuring first temperature sensor and second temperature sensor, control circuit can adjust radiator unit's radiating power, rely on the inside heat diffusion of phase transition heat-retaining material slowly with the fluidic constancy of temperature in the pipeline at preset target temperature, can avoid the emergence that actual temperature can exceed the settlement temperature phenomenon at the fluidic temperature control in-process of rising temperature or cooling.
Optionally, the phase-change heat storage material 2 includes paraffin, alloy powder, and graphite.
Optionally, the phase-change heat storage material 2 may be formed by mixing paraffin, alloy powder, graphite and the like according to a certain proportion, and the temperature control interval required by the fluid in the pipeline 1 may be different, so that the purposes of phase-change heat storage and temperature control buffering for the target temperature control temperature of the fluid can be achieved. Wherein the main molecular formula of the paraffin wax can be C28H58、C30H62Etc.; the alloy powder may include alloys such as Cu, Sn, Bi, and Zn, and the phase-change heat storage material 2 may be selected according to the fluid in the pipe 1, and the present application is not limited specifically herein.
For example, the fluid is water, the temperature control interval of the water is 20-100 ℃, and the molecular formula of the main component of the phase-change heat storage material 2 can be selected from paraffin wax28H58The mass fraction of the graphite is 71.5 percent, the mass fraction of the metal copper is 8.5 percent, and the mass fraction of the graphite is 20 percent; the temperature control range of the hydrocarbon and the water vapor is 100-200 ℃, for example, the fluid is non-methane total hydrocarbon (NMHC), and the molecular formula of the main component of the phase-change heat storage material 2 can be selected from paraffin30H6223.7 percent by mass and 68.3 percent by mass of the metal alloy, wherein the metal alloy is a Bi (56%) -Sn (40%) -Zn (4%) composite, and the graphite is 8 percent by mass; according to the temperature control interval of different fluids, the proportion and the type of paraffin, alloy powder and graphite can be selected as appropriate, and the application is not limited in particular.
Optionally, the filling thickness of the phase-change heat storage material 2 between the heating assembly 3 and the pipeline 1 is 0.5-10 mm.
Wherein, according to the practical application scenario, the filling thickness of the phase change heat storage material 2 between the heating component 3 and the pipeline 1 can be selected to be any thickness between 0.5 mm and 10mm, so that when the phase change heat storage material is used for heating the fluid in the pipeline 1, when the heating component 3 is heated to a set temperature, the residual heat continuously emitted after control delay can be fully absorbed by the phase change heat storage material 2, or when the phase change heat storage material is used for cooling the fluid in the pipeline 1, the heat emitted by the fluid can be absorbed through the phase change heat storage material 2 firstly, according to the requirement of cooling, and then the heat dissipation component 4 is adopted for cooling, thereby avoiding the occurrence of the temperature-runaway phenomenon in the temperature control process.
Optionally, the heating component 3 is a resistance wire, and the resistance wire is wound on the outer side of the pipeline.
Optionally, the resistance wires are arranged outside the pipeline in a net shape, a grid shape or a parallel shape.
When the heating component 3 is a resistance wire, the resistance wire can be arranged outside the pipeline in a winding manner, the resistance wire is electrically connected with the control circuit, the control circuit can drive the resistance wire to work to generate heat, heat can be transmitted to fluid in the pipeline cavity through the side wall of the pipeline, and the fluid absorbs the heat to achieve the purpose of temperature rise. Of course, the arrangement mode of the resistance wires is not limited in the application, and the resistance wires can be arranged outside the pipeline in one or more modes of net shape, grid shape or parallel arrangement, and can be arranged automatically according to the actual situation.
Optionally, the heat dissipation assembly 4 is a heat dissipation fan, and the control circuit is configured to drive the heat dissipation fan to operate.
The heat dissipation assembly 4 can be a heat dissipation fan, the heat dissipation fan is electrically connected with the control circuit, the control circuit can drive the heat dissipation fan to work, and the temperature of fluid in the pipeline cavity can be reduced through air flow. Optionally, the cooling fan may be disposed on a side surface of the pipeline, specifically, may be disposed on a side surface of the inlet of the pipeline, and for the fluid needing to be cooled, by disposing the cooling fan at the inlet of the pipeline, the temperature of the fluid needing to be cooled may be cooled as early as possible. Certainly, according to actual needs, radiator fan can include a plurality ofly, and a plurality of radiator fan can distribute respectively in entrance position, intermediate position, exit position etc. of pipeline 1 for can be diversified cool down to the fluid that needs the cooling.
Alternatively, the pipe 1 is a pipe 1 bent in a serpentine shape.
Wherein, snakelike crooked pipeline 1 can be the pipe array of closely arranging, can reduce pipeline 1's occupation space for carrying out fluidic intensification or cooling in-process, can carry out thermal transmission between close pipeline 1 and the pipeline 1, improve heating element 3 and radiator unit 4's utilization ratio. Of course, the shape and material of the pipe 1 are not limited herein, and the shape may be a "U" pipe, an "O" pipe, or the like, and the material may be copper, aluminum, or the like with high thermal conductivity, which may be selected according to the actual application scenario.
Optionally, the first temperature sensors 6 include a plurality of first temperature sensors 6, and the plurality of first temperature sensors 6 are uniformly distributed on the inner wall of the pipeline.
Wherein, with a plurality of first temperature sensor 6 evenly distributed on the pipeline inner wall, a plurality of first temperature sensor 6 can measure the temperature of each regional fluidic in pipeline 1, optionally, can calculate the average temperature that obtains a plurality of first temperature sensor 6 and gather, and control circuit can further judge whether to carry out intensification or cooling operation according to this average temperature.
Alternatively, a plurality of first temperature sensors 6 may be provided at the inlet of the duct, and the temperature of the fluid to be temperature-controlled before temperature control may be determined by obtaining an average value of the plurality of first temperature sensors 6; a plurality of first temperature sensors 6 may be disposed at the outlet of the pipeline, and it may be determined whether the temperature of the fluid to be temperature-controlled reaches a preset temperature after the temperature is controlled by obtaining an average value of the plurality of first temperature sensors 6. Of course, according to actual needs, a plurality of first temperature sensors 6 may also be disposed at the middle position of the pipeline 1, and the description of the present application is omitted.
Optionally, the second temperature sensors 5 include a plurality of second temperature sensors 5, the second temperature sensors 5 are uniformly distributed on the outer wall of the heating assembly 3, when the external ambient temperature of the fluid outside the pipeline 1 is obtained, the average value of the second temperature sensors 5 can be used as the average temperature of the external environment, according to the average temperature of the external environment and the external ambient temperature of the fluid outside the pipeline 1, which is collected by the second temperature sensors 5, the heating power of the heating assembly 3 is adjusted, or the heat dissipation power of the heat dissipation assembly 4 is adjusted, so that when the target temperature is approached, the occurrence of a temperature-flying phenomenon in a temperature control process can be avoided, and the temperature control process is more accurate.
Optionally, the temperature control device may be referred to as a method for controlling the temperature of the fluid in the pipeline, where the method includes:
and acquiring the temperature of the fluid in the pipeline cavity transmitted by the first temperature sensor.
The temperature control device is used for heating, and when the temperature of the fluid in the pipeline cavity is lower than a first preset temperature, the heating assembly is driven to work; acquiring a first temperature transmitted by a second temperature sensor, and adjusting the power of the heating assembly according to the first temperature and the temperature of fluid in the pipeline cavity; when the temperature of the fluid in the pipeline cavity is equal to a first preset temperature, the phase-change heat storage material absorbs heat, and the first preset temperature is the temperature of a phase-change point of the phase-change heat storage material; or the temperature control device is used for reducing the temperature, and when the temperature of the fluid in the pipeline cavity is higher than a second preset temperature, the phase-change heat storage material absorbs heat; when the temperature of the fluid in the pipeline cavity is equal to a second preset temperature, the heat dissipation assembly is driven to work; acquiring a second temperature transmitted by a second temperature sensor, and adjusting the power of the heat dissipation assembly according to the second temperature and the temperature of fluid in the pipeline cavity; the second preset temperature is the phase-change point temperature of the phase-change heat storage material.
When the temperature of the fluid in the pipeline cavity is lower than the first preset temperature, the controller drives the heating assembly to work to heat the temperature of the fluid; in the process, the first temperature sensor can measure the external environment temperature of the fluid outside the pipeline, and the power of the heating assembly can be adjusted by comparing the external environment temperature with the temperature of the fluid in the pipeline cavity, namely when the temperature of the fluid in the pipeline cavity is close to a first preset temperature, the power of the heating assembly can be reduced by adjusting, and the heat output of the heating assembly is reduced; when the temperature of the fluid in the pipeline cavity is equal to the first preset temperature, the phase-change heat storage material can absorb the residual heat of the heating assembly, the fluid is prevented from continuously absorbing the heat of the heating assembly and exceeding the first preset temperature, the aim of accurately controlling the temperature is achieved, and the temperature control precision can reach 0.01-0.05 ℃.
The second preset temperature is a preset target cooling temperature, and when the temperature of the fluid in the pipeline cavity is higher than the second preset temperature, the phase-change heat storage material can absorb the heat emitted by the fluid, so that the fluid can be rapidly cooled; when the temperature of the fluid in the pipeline cavity is equal to a second preset temperature, the heat dissipation assembly is driven to work, and the heat stored in the phase-change heat storage material can be quickly dissipated; the second temperature transmitted by the second temperature sensor is obtained, the power of the heat dissipation assembly is adjusted according to the second temperature and the temperature of the fluid in the pipeline cavity, the temperature of the fluid in the pipeline is kept constant at a second preset temperature slowly by means of heat diffusion inside the phase-change heat storage material, the purpose of accurate temperature control is achieved, and the temperature control precision can reach 0.01-0.05 ℃.
Optionally, the embodiment of the utility model provides a temperature control system is still provided, including foretell temperature control device, its realization principle and technological effect are similar, no longer describe herein.
Optionally, when the temperature control device is applied to a temperature control system, the temperature control device can be used for controlling a plurality of temperature adjustment modes such as an accurate temperature control mode and a rapid temperature control mode, wherein the accurate temperature control mode emphasizes the temperature adjustment accuracy, namely, the error between the temperature of the fluid in the pipeline and the preset temperature can be made as small as possible by adjustment, and the accuracy can be 0.01-0.05 ℃; the fast temperature control mode emphasizes the speed of temperature adjustment, that is, the temperature of the fluid in the pipeline can reach the preset temperature in the shortest possible time through adjustment.
Optionally, the control circuit may be based on a self-tuning AT technology of a PID control system, and include an automatic optimization PID and a fuzzy control algorithm, each of which is burned in the PLC control circuit with an independent logic module, and is triggered by a user inputting a corresponding start signal, thereby realizing temperature control in the accurate temperature control mode and the fast temperature control mode.
Example 1, the diameter of the pipe cavity was 6mm, the total length was 2.5m, the fluid was water, the temperature of the fluid measured with the first temperature sensor was 40 ℃, and optionally, in the phase-change heat storage material filling layer, the molecular formula of the main component of paraffin was C28H58, the mass fraction was 71.5%, the mass fraction of metal copper was 8.5%, and the mass fraction of graphite was 20%.
Taking an example of an accurate temperature rise mode when the set temperature is 60 ℃, correspondingly, the control circuit drives the heating assembly to heat the fluid in the pipeline, and when the first temperature sensor measures that the temperature of the fluid in the pipeline reaches the phase change point (60 ℃) of the phase change heat storage material, the phase change heat storage material starts to absorb the heat emitted by the heating assembly, so that the heat received by the fluid is greatly reduced; according to the temperature collected by the second temperature sensor and the temperature collected by the first temperature sensor, the PID automatic optimization algorithm is triggered, and the heating power of the heating assembly is set as a function of the temperature index, so that the heating power of the element is greatly reduced to be close to a constant temperature heat balance value when the heating power is close to the set temperature, and under the combined action of the control algorithm and the phase-change heat storage material, the temperature of the fluid in the pipeline cavity can be controlled to be constant at 60 +/-0.01 ℃, and the temperature control precision is improved.
Taking an accurate cooling mode at a set temperature of 20 ℃ as an example, when the first temperature sensor measures that the temperature of the fluid in the pipeline is 40 ℃, firstly, the phase-change heat storage material absorbs the heat emitted by the fluid, so that the fluid starts to be cooled quickly; then according to the temperature collected by the first temperature sensor and the temperature of the second temperature sensor, the PID automatic optimization algorithm is triggered, the rotating speed of the cooling fan is set to be a function of the temperature index, so that the heat stored in the phase-change heat storage material is rapidly dissipated, when the temperature is close to the set temperature, the cooling fan works at a very low rotating speed, and the temperature in the pipeline cavity is slowly kept constant at 20 +/-0.01 ℃ by means of heat diffusion in the phase-change heat storage material.
Example 2, the diameter of the tube cavity was 6mm, the total length was 2.5m, the fluid was non-methane total hydrocarbons (NMHC), the temperature of the fluid measured with the first temperature sensor was 100 ℃, optionally, the molecular formula of the main component of paraffin in the phase change heat storage material packed layer was C30H62The mass fraction is 23.7%, the metal alloy adopts Bi (56%) -Sn (40%) -Zn (4%) compound, accounts for 68.3%, and the graphite additive accounts for 8%.
Taking an example in a rapid heating mode at a set temperature of 130 ℃, firstly, a control circuit drives a heating assembly to heat, and when a first temperature sensor measures that the temperature of fluid in a pipeline reaches a phase change point (130 ℃) of a phase change heat storage material, the phase change heat storage material starts to absorb heat emitted by the heating assembly, so that the heat received by the fluid is greatly reduced; according to the temperature collected by the second temperature sensor and the temperature collected by the first temperature sensor, then the fuzzy control algorithm is triggered, corresponding adjusting values (for example, the heating power is 73W) are obtained according to the initial values (actual temperature/set temperature: 120 ℃/130 ℃) of the PID controller, then the final PID control parameters (for example, the heating power is 74W is output and is decreased at the speed of 0.25W/s) are obtained through addition, so that the element heating power parameters are quickly close to the target heat balance value, the temperature of the fluid in the pipeline cavity can be controlled to be constant at 130 ℃ +/-0.05 ℃, and the temperature control precision is improved.
It should be noted that, for the temperature rise and the temperature decrease of other fluids in the precise temperature control mode and the temperature rise and the temperature decrease in the fast temperature control mode, reference may be made to relevant portions of the above embodiments, which are not described herein again.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A temperature control apparatus, comprising: the device comprises a pipeline, a heating assembly, a heat dissipation assembly, a first temperature sensor, a second temperature sensor and a control circuit;
the heating assembly is wound on the outer side of the pipeline, and a phase-change heat storage material is filled between the heating assembly and the pipeline;
the first temperature sensor is arranged on the inner wall of the pipeline;
the second temperature sensor is arranged on the outer wall of the heating assembly;
the control circuit is electrically connected with the heating assembly, the heat dissipation assembly, the first temperature sensor and the second temperature sensor.
2. The apparatus of claim 1, wherein the phase change heat storage material comprises paraffin, alloy powder, and graphite.
3. The apparatus of claim 1, wherein the phase change heat storage material is filled between the heating element and the pipe to a thickness of 0.5-10 mm.
4. The device as claimed in claim 1, wherein the heating assembly is a resistance wire wound around the outside of the pipe.
5. The device as claimed in claim 4, wherein the resistance wires are arranged in a net, a grid or in parallel outside the tube.
6. The apparatus of claim 1, wherein the heat dissipation assembly is a heat dissipation fan, and the control circuit is configured to drive the heat dissipation fan to operate.
7. The apparatus of claim 1, wherein the conduit is a serpentine conduit.
8. The apparatus of claim 1, wherein the first temperature sensor comprises a plurality of first temperature sensors, and the plurality of first temperature sensors are uniformly distributed on the inner wall of the pipeline.
9. The apparatus of claim 1, wherein the second temperature sensor comprises a plurality of second temperature sensors, and the plurality of second temperature sensors are uniformly distributed on the outer wall of the heating assembly.
10. A temperature control system comprising a temperature control device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921614184.5U CN210441447U (en) | 2019-09-26 | 2019-09-26 | Temperature control device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921614184.5U CN210441447U (en) | 2019-09-26 | 2019-09-26 | Temperature control device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210441447U true CN210441447U (en) | 2020-05-01 |
Family
ID=70411163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921614184.5U Active CN210441447U (en) | 2019-09-26 | 2019-09-26 | Temperature control device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210441447U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513879A (en) * | 2019-09-26 | 2019-11-29 | 南京林业大学 | Temperature control equipment, method and system |
-
2019
- 2019-09-26 CN CN201921614184.5U patent/CN210441447U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513879A (en) * | 2019-09-26 | 2019-11-29 | 南京林业大学 | Temperature control equipment, method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6967829B2 (en) | Temperature control system equipped with a stick-on temperature equalizer and heat transfer fluid and its application equipment | |
| CN106255392B (en) | The cooling control method of electrical cabinet, device and system | |
| TWI694319B (en) | Temperature control device with electrothermal radiant tube and method thereof | |
| CN201152650Y (en) | Cold-hot transformation apparatus having solid multi-lattice | |
| US4200783A (en) | Apparatus for collecting and thermally storing energy | |
| CN110456842B (en) | Temperature control device and method for nucleic acid reaction | |
| CN210441447U (en) | Temperature control device and system | |
| JP2011528995A5 (en) | ||
| CN103252260B (en) | Temperature control device for indoor environmental chamber | |
| CN107726427A (en) | The temprature control method and heating system of a kind of regenerative apparatus | |
| CN110513879A (en) | Temperature control equipment, method and system | |
| CN107024946A (en) | High precision temperature control device and its temperature control method based on particle accelerator material irradiation | |
| JP6653118B2 (en) | Single-sided heat transfer type temperature equalizer | |
| Pointner et al. | Separation of power and capacity in latent heat energy storage | |
| Wits et al. | Experimental performance of a 3D-Printed hybrid heat pipe-thermosyphon for cooling of power electronics | |
| CN211978736U (en) | Device for measuring heat conductivity coefficient of composite phase change material by steady state method | |
| CN105004094A (en) | Semiconductor refrigeration equipment achieving heat radiation through heat pipes | |
| JPS61201689A (en) | Temperature inclining furnace for treating material and temperature incline formation | |
| CN207225027U (en) | Warm device and vehicle are clamped from source formula waste heat | |
| CN202494515U (en) | Temperature control clamp | |
| CN113310309A (en) | Vertical furnace and furnace body temperature control method thereof | |
| CN107415643A (en) | Used heat clamps down on control method with clamping warm device, vehicle from source formula used heat | |
| CN107817838B (en) | A kind of power transformer cooler method for controlling frequency conversion | |
| CN109763082A (en) | A kind of small-sized rapid temperature rise and drop annealing device suitable for quantum chip | |
| Huq et al. | An experimental study of heat transfer in an internally finned tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |