CN210534601U - Temperature control system - Google Patents
Temperature control system Download PDFInfo
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- CN210534601U CN210534601U CN201920933270.6U CN201920933270U CN210534601U CN 210534601 U CN210534601 U CN 210534601U CN 201920933270 U CN201920933270 U CN 201920933270U CN 210534601 U CN210534601 U CN 210534601U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 description 6
- 238000001824 photoionisation detection Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model relates to a temperature control system, equipment inner box, setting are in the equipment inner box and cut apart into the baffle of studio and wind channel two parts with the equipment inner box, set up heater and evaporimeter in the wind channel, set up the circulating fan at the equipment inner box top in the wind channel, correspond the temperature control thermometer that sets up on the equipment inner box with circulating fan, set up the object of being controlled in the studio, place the monitoring thermometer on the object of being controlled. The utility model has the characteristics of temperature control precision is high, stability is strong, has higher popularization and application and worth.
Description
Technical Field
This patent application belongs to temperature control technical field, and more specifically says, relates to a temperature control system.
Background
In equipment needing temperature control, such as a refrigeration house, a high-low temperature test chamber and the like, a temperature control thermometer is generally arranged at an air outlet or an air return inlet of a circulating fan. The PID and other temperature control parameters are debugged and adjusted by a temperature control thermometer. In actual use, users tend to be more concerned about the actual temperature of a controlled object placed in the device. The temperature difference exists between the temperature of the controlled object and the air outlet, and the PID and other control parameters are different. If the PID of the temperature control thermometer is adopted to control the temperature of the controlled object, the conditions of large overshoot, long balancing time, large fluctuation and even instability can occur. Some manufacturers set two sets of PIDs for the air outlet and the controlled object. Due to the uncertainty of the volume, weight and heat capacity of the controlled object and the difference of the installation positions of the thermometers, one set of PID can not meet the requirement of accurate temperature control.
Through analysis, the difference between the temperature of the air outlet and the temperature of the controlled object in the temperature field comes from the distance between the temperature sensor and the evaporator and the heater, the wind speed of the point where the temperature sensor is located, the heat capacity of the temperature sensor and the temperature measuring object, and other factors. In a temperature field, the closer to an evaporator and a heater, the larger the wind speed, the smaller the heat capacity of the temperature sensor and a temperature measuring object thereof (the heat capacity of the sensor at an air outlet), and the more sensitive the temperature reaction. After the temperature of the sensor sensitive to temperature reaction is stable, the temperature of other points in the temperature field is also stable. Therefore, the temperature of the controlled object can be achieved by selecting the proper temperature of the air outlet.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved in the present invention is to provide a temperature control method and system, which utilizes an air outlet thermometer and its PID to control the temperature of the controlled object to reach a set value and stabilize the temperature.
In order to solve the above problem, the utility model discloses the technical scheme who adopts is:
a temperature control system comprises an equipment inner box, a partition plate, a heater, an evaporator, a circulating fan, a temperature control thermometer, a controlled object and a monitoring thermometer, wherein the partition plate is arranged in the equipment inner box and divides the equipment inner box into a working chamber and an air duct, the heater and the evaporator are arranged in the air duct, the circulating fan is arranged at the top of the equipment inner box in the air duct, the temperature control thermometer is arranged on the equipment inner box and corresponds to the circulating fan, the controlled object is arranged in the working chamber, and the monitoring thermometer is placed on the controlled object.
The utility model discloses technical scheme's further improvement lies in: the heater and the evaporator are arranged up and down, the heater is positioned above the evaporator, and the circulating fan corresponds to the heater.
The utility model discloses technical scheme's further improvement lies in: the baffle is vertically arranged in the equipment inner box, and the upper end and the lower end of the baffle are correspondingly provided with intervals with the upper edge and the lower edge of the equipment inner box.
The utility model discloses technical scheme's further improvement lies in: the length of the partition board is 2/3-2/5 of the height of the equipment inner box, and the upper end and the lower end of the partition board are equal to the spacing distance between the upper edge and the lower edge of the equipment inner box.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains is:
the utility model discloses the system is used for adopting a temperature control method to the temperature control system that the thermal capacity is bigger for the controlled object, and the temperature control precision is higher, adopts two thermometers, and the first branch arranges the most sensitive position of temperature change in the whole temperature field, as the temperature control thermometer; the second branch is installed on the controlled object and used as a monitoring thermometer for monitoring the temperature of the controlled object. When the temperature control thermometer is used, the temperature of the temperature control thermometer reaches the target temperature of a controlled object and is stable, then the difference value between the temperature of the controlled object and the target temperature is calculated, the next target temperature of the temperature control thermometer is changed according to the difference value, the temperature of the controlled object reaches the target temperature finally through multiple times of adjustment approximation, and high stability is achieved.
Drawings
FIG. 1 is a schematic diagram of the temperature control system of the present invention;
wherein: 1. circulating fan, 2, heater, 3, evaporimeter, 4, baffle, 5, accuse temperature thermometer, 6, monitoring thermometer, 7, equipment inner box, 8, controlled object.
Detailed Description
The present invention will be described in further detail with reference to examples.
Firstly, the utility model discloses a temperature control method, in the occasion that needs the accuse temperature, set up temperature control thermometer 5 with temperature change sensitive point in the temperature field, set up monitoring thermometer 6 on controlled object 8, through controlling the current temperature of temperature control thermometer 5, make the temperature of monitoring thermometer 6 reach the target temperature value; the current temperature of the temperature change sensitive point displayed by the temperature control thermometer 5 is Tc, the target temperature of the temperature change sensitive point is Tcm, the current temperature of the controlled object 8 displayed by the monitoring thermometer 6 is Tw, the target temperature of the controlled object 8 is Twm, and the specific temperature control process is as follows:
step one, first temperature reduction/rise operation: firstly, assigning Twm to Tcm, namely starting first temperature reduction/rise operation when Tcm = Twm;
step two, judging the conditions, namely, when the | Tc-Twm | is less than △ T1 ℃ and the change of Tw in one minute before and after is less than △ T2 ℃, considering that Tc and Tw are close to stability;
step three, cooling/heating operation for the ith time: adding the sum of the difference between Twm and Tw to Twm, namely Tcm = Tc + n (i) (. Twm-Tw), and starting the ith cooling/heating operation, wherein n (i) is the proportionality coefficient of the ith cooling/heating operation, and i is a natural number which is more than or equal to 2; i =2,3,4 …;
and step four, circulating operation, namely after i times of circulating operation in the step two and the step three, when Tw = Twm +/- △ T, judging that the current temperature Tw of the controlled object (8) has reached the target temperature Twm of the controlled object 8, and maintaining the stable operation of the current temperature, wherein △ T is an allowable temperature fluctuation value.
The temperature change sensitive point is an air outlet;
△ T1 is 0.2-0.5 deg.C, △ T2 is 1.5-2.5 deg.C, n (i) is arithmetic progression, △ T is 0.1-0.6 deg.C.
n (i) =1, tolerance 0; or in n (i), n (2) =1 with a tolerance of 0.2-0.8, for example, 0.5, then n (3) =1.5, n (4) =2, and then the steps are increased in steps.
The utility model provides a temperature control system, see figure 1 for realize above-mentioned temperature control method, this system includes equipment inner box 7, set up in equipment inner box 7 and split into baffle 4 of studio and wind channel two parts with equipment inner box 7, heater 2 and evaporimeter 3 of setting in the wind channel, set up circulating fan 1 at the equipment inner box 7 top in the wind channel, correspond the temperature control thermometer 5 that sets up on equipment inner box 7 with circulating fan 1, set up controlled object 8 in the studio, place monitoring thermometer 6 on controlled object 8.
The heater 2 and the evaporator 3 are arranged up and down, the heater 2 is positioned above the evaporator 3, and the circulating fan 1 corresponds to the heater 2.
The partition plate 4 is longitudinally arranged in the equipment inner box 7, and a space is correspondingly arranged between the upper end and the lower end of the partition plate 4 and the upper edge and the lower edge of the equipment inner box 7.
The length of the partition plate 4 is 2/3-2/5, such as 3/5, of the height of the equipment inner box 7, and the upper end and the lower end of the partition plate 4 are spaced apart from the upper edge and the lower edge of the equipment inner box 7 by the same distance.
The temperature control method of the utility model is as follows:
when the temperature is stable, if the temperature difference between the outlet (temperature sensitive point) temperature and the controlled object 8 does not change or does not change much with the temperature change, n (i) =1, i =2,3,4 …. Table 1 shows the temperatures
When the temperature is stable, the current temperature Tc of the air outlet and the current temperature Tw of the controlled object 8 are large and small. It can be seen that, regardless of the temperature, the current temperature Tc of the outlet is always higher than the current temperature Tw of the controlled object 8 by 5 ℃.
Current temperature of air outlet Tc (DEG C) current temperature Tw-Tw (DEG C) of controlled object
188 183 5
185 180 5
180 175 5
170 165 5
150 145 5
120 115 5
90 85 5
60 55 5
30 25 5
0 - 5 5
-30 -35 5
-60 -65 5
-90 -95 5。
Table 1: temperature of air outlet and temperature of controlled object
If the current temperature Tw of the controlled object 8 is 25 ℃ and the target temperature Twm of the controlled object 8 is 120 ℃,2 heating operations are required to reach the target temperature, as shown in table 2.
Number of times Twm (. degree. C.) Tc (. degree. C.) Tw (. degree. C.)
0 120 30 25
1 120 120 115。
Table 2: temperature change situation
The above is the simplest case, but does not correspond to the actual situation. In reality, the difference between the outlet temperature Tc and the real-time temperature Tw of the controlled object 8 is often the smallest near the ambient temperature, because the ambient heat leakage is a main factor of the difference. When the temperature rises, the outlet temperature Tc rises faster than the real-time temperature Tw of the controlled object 8, and the higher the temperature is, the larger the difference between the outlet temperature Tc and the real-time temperature Tw of the controlled object 8 is in a stable state. When the temperature decreases, the outlet temperature Tc and the real-time temperature Tw of the controlled object 8 decrease rapidly, and the lower the temperature is, the greater the temperature difference between the outlet temperature Tc and the real-time temperature Tw of the controlled object 8 becomes with the decrease in temperature, as shown in table 3.
The temperature difference becomes larger as the temperature decreases, as shown in table 3.
Current temperature of air outlet Tc (DEG C) current temperature Tw-Tw (DEG C) of controlled object
188 120 68
185 117 68
180 115 65
170 110 60
150 100 50
120 90 30
90 70 20
60 50 10
30 25 5
0 10 -10
-30 -10 -20
-60 -30 -30
-90 -40 -50。
Table 3: temperature of air outlet and temperature of controlled object
When n (i) =1, i =2,3,4, it takes 6 times of heating to make the temperature of the controlled object reach the set temperature 120 degrees (table 4). This is because the temperature of the controlled object approaches the set temperature every time the temperature rises, but the approaching speed becomes slower and slower.
The number of times Twm n (i) =1, i =2,3,4 … n (i) =1,1.2, 1.4 … n (i) =1,1.5,2.0 …
(℃) Tc(℃) Tw(℃) Tc(℃) Tw(℃) Tc(℃) Tw(℃)
0 120 30 25 30 25 30 25
1 120 120 90 120 90 120 90
2 120 150 100 156 104 165 108
3 120 170 110 178.4 114 189 120.3
4 120 180 115 188 120 188.25 120.5
5 120 185 117
6 120 188 120。
Table 4: temperature change situation
At this time, if the value of n (i) is increased, the speed of reaching the set temperature can be increased. For example, n (2) =1, n (3) =1.2, n (4) =1.4, and n (5) =1.6 …. n (i) is an arithmetic progression, the difference being 0.2. The set temperature of 120 deg.c can be reached in only 4 steps (table 4).
Or, if the difference of the arithmetic progression is increased from 0.2 to 0.5, the set temperature can be reached to 120 +/-0.5 degrees only by 3 steps, and the overshoot of 0.3 degrees appears, and the overshoot of the next step is only 0.05 degrees.
The above embodiment is calculated from the case where the ambient temperature is raised, and actually, from any one temperature, it is true whether raising or lowering the temperature, and stabilizing to another temperature.
Claims (4)
1. A temperature control system is characterized by comprising an equipment inner box (7), a partition plate (4) which is arranged in the equipment inner box (7) and divides the equipment inner box (7) into a working chamber and an air duct, a heater (2) and an evaporator (3) which are arranged in the air duct, a circulating fan (1) which is arranged at the top of the equipment inner box (7) in the air duct, a temperature control thermometer (5) which corresponds to the circulating fan (1) and is arranged on the equipment inner box (7), a controlled object (8) which is arranged in the working chamber, and a monitoring thermometer (6) which is arranged on the controlled object (8).
2. A temperature control system according to claim 1, wherein: the heater (2) and the evaporator (3) are arranged up and down, the heater (2) is positioned above the evaporator (3), and the circulating fan (1) corresponds to the heater (2).
3. A temperature control system according to claim 2, wherein: the partition board (4) is longitudinally arranged in the equipment inner box (7), and the upper end and the lower end of the partition board (4) are correspondingly provided with intervals with the upper edge and the lower edge of the equipment inner box (7).
4. A temperature control system according to claim 3, wherein: the length of the partition board (4) is 2/3-2/5 of the height of the equipment inner box (7), and the spacing distance between the upper end and the lower end of the partition board (4) and the upper edge and the lower edge of the equipment inner box (7) is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920933270.6U CN210534601U (en) | 2019-06-20 | 2019-06-20 | Temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920933270.6U CN210534601U (en) | 2019-06-20 | 2019-06-20 | Temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210534601U true CN210534601U (en) | 2020-05-15 |
Family
ID=70595680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920933270.6U Active CN210534601U (en) | 2019-06-20 | 2019-06-20 | Temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210534601U (en) |
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2019
- 2019-06-20 CN CN201920933270.6U patent/CN210534601U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210909 Address after: 528400 No. 53, Donghui Road, Cuiheng New District, Zhongshan City, Guangdong Province Patentee after: Zhongkesailing (Zhongshan) Technology Co.,Ltd. Address before: 528403 card A15, 4th floor, building B, innovation center plant, No. 34, Cuicheng Road, Cuiheng new area, Zhongshan City, Guangdong Province, one business place is added, and zone T, first floor, phase I, No. 3, Chuangye Road, Torch Development Zone, Zhongshan City Patentee before: Zhongke Sailing (Zhongshan) Low Temperature Equipment Co.,Ltd. |
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| TR01 | Transfer of patent right |