CN101950187B - Temperature control device and temperature control method for foot bath device - Google Patents
Temperature control device and temperature control method for foot bath device Download PDFInfo
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- CN101950187B CN101950187B CN 201010292654 CN201010292654A CN101950187B CN 101950187 B CN101950187 B CN 101950187B CN 201010292654 CN201010292654 CN 201010292654 CN 201010292654 A CN201010292654 A CN 201010292654A CN 101950187 B CN101950187 B CN 101950187B
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Abstract
The invention particularly relates to a temperature control method for a foot bath device. The temperature control device comprises a temperature sensor and a microprocessor which are arranged in a foot tub; the input end of the microprocessor is connected with the temperature sensor and a setting key; the output end of the microprocessor is connected with a relay and a display; the output end of the relay is connected with a heating element; and the input ends of the temperature sensor, the relay, the microprocessor, the display and the setting key are connected with the output end of a power module respectively. On the one hand, the device directly measures the water temperature value and therefore error is reduced; and on the other hand, the device forms a closed-loop control system, and the microprocessor can adjust the heating power of the heating element through the relay according to the feedback of the real-time measurement value of water temperature, so that the control precision is higher and the comfort of the human body is greatly improved.
Description
Technical field
The present invention relates to the Pediluvium apparatus field, be specifically related to a kind of temperature-controlled process of Pediluvium apparatus.
Background technology
Pediluvium apparatus in the market adopts the water-bath mode mostly, water temperature is adjustable between 40 to 50 degree, the topmost technical indicator of this Pediluvium apparatus is the control accuracy and stability of temperature, now its temperature control of the various Pediluvium apparatus on the market adopts the bi-metal temperature gauge tap to realize mostly, its advantage is cheap, stable, reliably, circuit is simple, shortcoming is that precision is low, reason mainly is that this Pediluvium apparatus is carried out measurement, what control is identity element, therefore it can not be installed in the water, generally be installed on the well heater or near the well heater, what it was measured like this is not water temperature, but and water temperature the temperature of the well heater of certain difference is arranged, therefore often come set temperature value according to the fixedly difference of displayed value and heter temperature, and because the variation of environment temperature, the temperature gap of displayed value and well heater is to change, for example the room temperature in the room temperature in winter and summer varies widely, the Temperature Hysteresis Effect of adding the Temperature Hysteresis Effect of well heater and water temperature is also different, so cause temperature control not accurately with steady, error is generally all about 2 to 3 degree.Because the people is highstrung to the variation of temperature, therefore the low Pediluvium apparatus of this precision reduces the comfort level of human body greatly.
Summary of the invention
The temperature control equipment that the purpose of this invention is to provide the high Pediluvium apparatus of a kind of control accuracy improves the comfort level of human body greatly.
For achieving the above object, the present invention has adopted following technical scheme, the temperature control equipment of its Pediluvium apparatus comprises temperature sensor, the microprocessor that is arranged in the foot bath, the input end jointing temp sensor of described microprocessor and key is set, output relay termination and display, the output termination heating element (not marking among the figure) of relay, temperature sensor, relay, microprocessor, display, the input end that key is set connect respectively the output terminal of power module.
As shown from the above technical solution, directly water temperature value is measured by temperature sensor, can be arranged temperature by key is set, microprocessor is according to the temperature of setting and the real-time temperature of measuring, relay is controlled, directly driven heating element by relay.This device is directly measured water temperature value on the one hand, reduced error, this device consists of closed-loop control system on the other hand, microprocessor can be according to the feedback of the real-time measurement values of water temperature, adjust the heating power of heating element by relay, make control accuracy more accurate, greatly improved the comfort level of human body.
The present invention also comprises the temperature-controlled process of Pediluvium apparatus, may further comprise the steps:
Step 1: microprocessor reads measures temperature value and set temperature value;
Step 2: judge and whether measure temperature value more than or equal to set temperature value, if, execution in step 3, if not, execution in step 2a;
Step 3: close heating element;
Step 4: read the measurement temperature value;
Step 5: judge to measure that temperature reaches or close to design temperature, if, execution in step 6, if not, execution in step 4 again;
Step 6: adopt the time pid algorithm by relay heating element to be controlled;
Finish;
Step 2a: whether judge to measure temperature value more than or equal to the cut-off temperature value, if, in turn execution in step 3, step 4, step 5, step 6, if not, execution in step 2b;
Step 2b: make the heating element full power operation;
Step 2c: read the measurement temperature value;
Step 2d: judge to measure temperature value and whether reach the cut-off temperature value, if, in turn execution in step 3, step 4, step 5, step 6, if not, execution in step 2c again.
Microprocessor collects the temperature of temperature sensor, employing time pid algorithm is controlled relay, for overcoming the temperature overshot of time pid algorithm, be provided with the cut-off temperature and suppressed, thereby guaranteed to control without overshoot in the high-precision and stable of whole control procedure.
Description of drawings
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the circuit theory diagrams of driving circuit of the present invention;
Fig. 3 is the process flow diagram of control method of the present invention.
Embodiment
As shown in Figure 1, the temperature control equipment of its Pediluvium apparatus comprises temperature sensor 2, the microprocessor 4 that is arranged in the foot bath, the input end jointing temp sensor 2 of microprocessor 4 and key 6 is set, output relay termination 3 and display 5, the output termination heating element of solid-state relay 3, temperature sensor 2, solid-state relay 3, microprocessor 4, display 5, the input end that key 6 is set connect respectively the output terminal of power module 1.
Directly water temperature value is measured by temperature sensor 2, can be arranged temperature by key 6 is set, microprocessor 4 is controlled relay 3 according to the temperature of setting and the real-time temperature of measuring, and directly drives heating element by relay 3.
Described relay 3 is solid-state relay, as shown in Figure 1, this device also comprises driving circuit 7, the input termination microprocessor 4 of driving circuit 7, output termination solid-state relay 3, as shown in Figure 2, driving circuit 7 comprises triode 8, the base stage of described triode 8 connects the output terminal of microprocessor 4 by resistance R 2, emitter connects the output terminal of power module 1 by resistance R 1, grounded collector, two input ends of described solid-state relay 3 are connected on respectively the two ends of resistance R 1, and triode 8 is the positive-negative-positive triode.
Relay 3 also can be other relays such as electromagnetic relay, as preferred version of the present invention, relay 3 is solid-state relay, solid-state relay has life-span height, highly sensitive, the advantage such as electromagnetic interference (EMI) is little, greatly improved the stability of this device, driving circuit 7 is used for driving solid-state relay 3 work.
Described temperature sensor 2 is digital temperature sensor, and digital temperature sensor has the advantages such as precision height, good stability, reaction be fast, directly exports digital temperature signal, can be directly and microprocessor 4 interfaces.
The described key 6 that arranges comprises three keys, is respectively SET key, UP key, DOWN key, and described display 5 is three charactrons.
Described temperature sensor 2 and heating element are in dodges the position, and the bottom of foot bath is provided with heating plate, and heating element is positioned at the below of heating plate.
Arranging like this can avoid the local temperature of temperature sensor 2 measurements too high, can not reflect really water temperature value, the degree of accuracy of impact control.
Described power module 1 is Switching Power Supply, and the power supply of whole circuit realizes that by switching power circuit its efficient is high, isolation performance is good, lightweight, volume is little, voltage adaptation wide ranges, safe and reliable.
As shown in Figure 3, the present invention also comprises the temperature-controlled process of Pediluvium apparatus, comprises the steps:
Step 1: microprocessor 4 reads measures temperature value and set temperature value;
Step 2: judge and whether measure temperature value more than or equal to set temperature value, if, execution in step 3, if not, execution in step 2a;
Step 3: close heating element;
Step 4: read the measurement temperature value;
Step 5: judge to measure that temperature reaches or close to design temperature, if, execution in step 6, if not, execution in step 4 again;
Step 6: adopt the time pid algorithm by relay heating element to be controlled;
Finish;
Step 2a: whether judge to measure temperature value more than or equal to the cut-off temperature value, if, in turn execution in step 3, step 4, step 5, step 6, if not, execution in step 2b;
Step 2b: make the heating element full power operation;
Step 2c: read the measurement temperature value;
Step 2d: judge to measure temperature value and whether reach the cut-off temperature value, if, in turn execution in step 3, step 4, step 5, step 6, if not, execution in step 2c again.
Described cut-off temperature obtains by the gliding curve method, concrete grammar is as follows: make the heating element heating with full power, when measuring the series of temperature of temperature before reaching design temperature, close heating element, allow the remaining temperature of heating element continue water in the heating foot bath, a series of values of measuring temperature when we are closed heating element call measures the cut-off temperature value, measure simultaneously water temperature, just can obtain the curve of a series of time-measurement water temperature value under the different measuring cut-off temperature value, this a series of time--the curve of measuring water temperature value is exactly gliding curve, in these a series of gliding curves, can find a temperature mxm. to equal or close to the gliding curve of design temperature, the measurement cut-off temperature value that this gliding curve is corresponding is exactly the value of heating cut-off temperature.
Below in conjunction with Fig. 1, Fig. 2, Fig. 3 the principle of work of the preferred embodiments of the present invention is described, Switching Power Supply 1 is each module for power supply, and microprocessor 4 directly operates digital temperature sensor 2 and reads temperature value; Microprocessor 4 detects can accept UP key and DOWN key to the modification of set temperature value when the SET key is pressed, the design temperature scope is to spend from room temperature to 60; Microprocessor 4 is according to the temperature of setting and the real-time temperature of measuring, employing is controlled without the pid algorithm of overshoot, drive solid-state relay 3 work by the driving circuit 7 that is made of the positive-negative-positive triode, solid-state relay 3 directly drives heating element (not marking among the figure).
The detailed process of microprocessor 4 control temperature is as follows: the measurement temperature value that at first reads digital temperature sensor 2, read again the set temperature value of SET key setting (if the SET key is not pressed, then read the temperature value of an acquiescence), and calculate the cut-off temperature value according to this set temperature value by gliding curve, will measure temperature value and set temperature value compares.If measure temperature value more than or equal to set temperature value, then close heating element, utilize waste-heat, when measuring that temperature value reaches or beginning to adopt the time pid algorithm to control by 3 pairs of heating elements of solid-state relay during close to set temperature value, finally maintain a stable temperature, control accuracy can reach ± 0.5 degree; If measure temperature value less than setting the temperature value, heating cut-off temperature value more than or equal to gliding curve, then close heating element, utilize waste-heat, when measuring that temperature value reaches or beginning to adopt the time pid algorithm to control by 3 pairs of heating elements of solid-state relay during close to set temperature value, finally maintain a stable temperature; If measure temperature value less than set temperature value, also the heating less than gliding curve ends temperature, then make the heating element full power operation, after the measurement temperature value reaches heating cut-off temperature value, close heating element, utilize waste-heat, when measuring that temperature value reaches or beginning to adopt the time pid algorithm to control by 3 pairs of heating elements of solid-state relay during close to set temperature value, finally maintain a stable temperature.
This device control accuracy can reach ± 0.5 degree, and circuit is simple, and whole circuit is made single sided board, and not only cost is low, and isolation performance is good, reliable and stable.
Claims (2)
1. the temperature-controlled process of a Pediluvium apparatus, wherein the temperature control equipment of Pediluvium apparatus comprises microprocessor (4) and is arranged at the interior temperature sensor (2) of foot bath, the input end jointing temp sensor (2) of described microprocessor (4) and key (6) is set, output relay termination (3) and display (5), the output termination heating element of relay (3), temperature sensor (2), microprocessor (4), display (5), the input end that key (6) is set connects respectively the output terminal of power module (1), described relay (3) is solid-state relay, this control device also comprises driving circuit (7), the input end of described driving circuit (7) connects respectively microprocessor (4) and power module (1), output termination solid-state relay (3) is characterized in that comprising the steps:
Step 1: microprocessor (4) reads measures temperature value and set temperature value;
Step 2: judge and whether measure temperature value more than or equal to set temperature value, if, execution in step 3, if not, execution in step 2a;
Step 3: close heating element;
Step 4: read the measurement temperature value;
Step 5: judge to measure that temperature reaches or close to design temperature, if, execution in step 6, if not, execution in step 4 again;
Step 6: adopt the time pid algorithm by relay heating element to be controlled;
Finish;
Step 2a: whether judge to measure temperature value more than or equal to the cut-off temperature value, if, in turn execution in step 3, step 4, step 5, step 6, if not, execution in step 2b;
Step 2b: make the heating element full power operation;
Step 2c: read the measurement temperature value;
Step 2d: judge to measure temperature value and whether reach the cut-off temperature value, if, in turn execution in step 3, step 4, step 5, step 6, if not, execution in step 2c again.
2. the temperature-controlled process of Pediluvium apparatus according to claim 1, it is characterized in that: described cut-off temperature obtains by the gliding curve method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010292654 CN101950187B (en) | 2010-09-27 | 2010-09-27 | Temperature control device and temperature control method for foot bath device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010292654 CN101950187B (en) | 2010-09-27 | 2010-09-27 | Temperature control device and temperature control method for foot bath device |
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| Publication Number | Publication Date |
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| CN101950187A CN101950187A (en) | 2011-01-19 |
| CN101950187B true CN101950187B (en) | 2013-01-09 |
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| CN 201010292654 Expired - Fee Related CN101950187B (en) | 2010-09-27 | 2010-09-27 | Temperature control device and temperature control method for foot bath device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103202663B (en) * | 2013-03-29 | 2014-12-03 | 依莱克顿(宁波)电器科技有限公司 | Water dispenser energy-saving control method and water dispenser control circuit |
| CN105987493A (en) * | 2015-02-04 | 2016-10-05 | 深圳市福田区青少年科技教育协会 | Water-saving foot tub |
| CN104633947A (en) * | 2015-02-11 | 2015-05-20 | 芜湖美的厨卫电器制造有限公司 | Water distributor and water heating device |
| CN105022427A (en) * | 2015-07-21 | 2015-11-04 | 陈丹 | Temperature control system and temperature control method |
| CN106060975B (en) * | 2016-05-31 | 2019-07-05 | 郑州治世长云科技有限公司 | Electric roasting/baking oven heating control system and control method |
| CN106018473A (en) * | 2016-07-15 | 2016-10-12 | 东华大学 | Rapid thermal resistance testing device for warm clothing material |
| CN108245006B (en) * | 2016-12-28 | 2020-07-07 | 浙江绍兴苏泊尔生活电器有限公司 | Electric kettle heating temperature control method and electric kettle |
| EP3772168A1 (en) * | 2019-08-02 | 2021-02-03 | Schneider Electric Industries SAS | Detection of a failure of a power module based on operating conditions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201131630Y (en) * | 2007-12-25 | 2008-10-15 | 天津三星电子有限公司 | An electric heating kettle capable of setting temperature |
| CN201529055U (en) * | 2009-09-21 | 2010-07-21 | 邬志坚 | Intelligent foot-bathing device |
| CN201820155U (en) * | 2010-09-27 | 2011-05-04 | 合肥健桥医疗电子有限责任公司 | Temperature control device of foot bath device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW562673B (en) * | 2001-12-14 | 2003-11-21 | Sanyo Electric Co | Foot warming bath device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201131630Y (en) * | 2007-12-25 | 2008-10-15 | 天津三星电子有限公司 | An electric heating kettle capable of setting temperature |
| CN201529055U (en) * | 2009-09-21 | 2010-07-21 | 邬志坚 | Intelligent foot-bathing device |
| CN201820155U (en) * | 2010-09-27 | 2011-05-04 | 合肥健桥医疗电子有限责任公司 | Temperature control device of foot bath device |
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Inventor after: Zhou Hanyi Inventor after: Zhou Yi Inventor after: Xu Bin Inventor after: Wang Jing Inventor after: Guo Linliang Inventor after: Yu Dongyan Inventor after: Ding Fu Inventor before: Zhou Hanyi Inventor before: Zhou Yi Inventor before: Xu Bin Inventor before: Wang Jing Inventor before: Guo Linliang Inventor before: Yu Dongyan |
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Free format text: CORRECT: INVENTOR; FROM: ZHOU HANYI ZHOU YI XU BIN WANG JING GUO LINLIANG YU DONGYAN TO: ZHOU HANYIZHOU YI XU BIN WANG JING GUO LINLIANG YU DONGYAN DING FU |
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