CN111124002B - Accurate temperature control method for household appliance - Google Patents
Accurate temperature control method for household appliance Download PDFInfo
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- CN111124002B CN111124002B CN201811292049.3A CN201811292049A CN111124002B CN 111124002 B CN111124002 B CN 111124002B CN 201811292049 A CN201811292049 A CN 201811292049A CN 111124002 B CN111124002 B CN 111124002B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention relates to a method for accurately controlling the temperature of household appliances, which is characterized by comprising the following steps: step 1, setting a target temperature Tset and setting an initial overshoot temperature; and 2, measuring the actual temperature Tc of the heated body, comparing the actual temperature Tc of the heated body with the target temperature Tset, stopping heating the heated body if the actual temperature Tc of the heated body is greater than or equal to the target temperature Tset, then entering the step 3 to measure the overshoot temperature, and entering a light load mode or a heavy load mode according to the overshoot temperature condition. Compared with the prior art, the invention has the advantages that: through the actual temperature change of real-time supervision heated body and the size of uprush temperature, judge through the uprush temperature value whether the food volume reduces and whether truns into the change power under the different power circumstances, realize the heating power gear of real-time regulation heating body to accurate accuse temperature.
Description
Technical Field
The invention relates to a method for accurately controlling the temperature of a household appliance.
Background
In the conventional heating type home appliance, a temperature sensor is generally provided to measure the temperature of a heated body, and when the temperature of the heated body is lower than a set target temperature, the heated body is heated at a fixed power; when the temperature of the heated body is close to the target temperature, the heating body is heated with smaller heating power; when the temperature of the heated body is higher than the target temperature, the heating body stops heating.
The disadvantage of this temperature control method is that if the heating body is heated with a fixed power under the condition of few food, the temperature will overshoot when the heated body reaches the target temperature, the temperature fluctuation is large, and the temperature control is inaccurate, for example, the temperature overshoot will cause the oil smoke generation in the process of hot oil in the household cooking machine; in another case, when the temperature of the heated body is closer to the target temperature, the heated body is heated with a smaller heating power, and if the food is much, the temperature is increased too slowly in this way, so that the cooking time is long, and the user experience is affected.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a device for solving the above-mentioned prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: an accurate temperature control method for household appliances is characterized by comprising the following steps:
step 1, setting a target temperature, namely Tset, setting an initial uprush temperature, namely ShangChong _ Temp;
step 2, measuring the actual temperature Tc of the heated body, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and entering step 3; if the actual temperature Tc of the heated body is less than the target temperature Tset, calculating the difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored initial power array HotBuff according to the value of the first variable, setting a corresponding relation between the value of the first variable and the heating power gear of the heated body in the initial power array HotBuff, finding the heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, and heating the heated body according to the found heating power gear; then returning to the step 2;
step 3, recording the highest temperature in the actual temperature of the heated body, recording the highest temperature as Tmax, calculating the difference value between the Tmax and the Tset, recording the difference value as an upper-thrust temperature Up _ Temp, comparing the upper-thrust temperature Up _ Temp with an initial upper-thrust temperature ShangChong _ Temp, judging the upper-thrust temperature Up _ Temp to be light load if the upper-thrust temperature Up _ Temp is greater than the initial upper-thrust temperature ShangChong _ Temp, starting a light load mark position, and enabling the heated body to work according to a light load mode; if the uprush temperature Up _ Temp is not more than the initial uprush temperature, judging that the overload is caused, starting the position of the overload mark, and enabling the heating body to work in a overload mode;
the work flow of the light load mode is as follows:
step A, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and returning to the step 2; if the actual temperature Tc of the heated body is less than the target temperature Tset, entering the step B;
b, calculating a difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored light load power array HotBuff _ QingZai according to the value of the first variable, setting a corresponding relation between the value of the first variable and a heating power gear of the heating body in the light load power array HotBuff _ QingZai, finding a heating power gear of the heating body corresponding to the value of the first variable according to the value of the first variable, heating the heating body according to the found heating power gear, and then entering the step C;
step C, after delaying the first preset time, detecting the actual temperature Tc of the heated body again, and if the actual temperature of the heated body is more than or equal to the previous actual temperature, returning to the step A; if the actual temperature of the heated body is lower than the previous actual temperature, the temperature is lowered to the mark position, and the heating body enters a heavy-load mode;
the work flow of the heavy load mode is as follows:
step a, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and then entering step 3; if the actual temperature Tc of the heated body is less than the target temperature Tset, entering the step b;
b, when the actual temperature Tc of the heated body is smaller than the target temperature Tset, calculating the difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored heavy-load power array HotBuff _ zhongZai according to the value of the first variable, setting a corresponding relation between the value of the first variable and the heating power gear of the heated body in the heavy-load power array HotBuff _ zhongZai, finding a heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, heating the heated body according to the found heating power gear, and then entering the step c;
c, after delaying for a second preset time, detecting the actual temperature of the heated body again, and returning to the step a if the actual temperature of the heated body is greater than or equal to the previous actual temperature; if the actual temperature of the heated body is lower than the previous actual temperature, calculating the difference value between the actual temperature of the heated body and the actual temperature of the heated body, storing the difference value between the actual temperature of the heated body and the actual temperature of the heated body in a preset second variable, adding the difference value between the target temperature and the actual temperature of the heated body to the value of the second variable, storing the difference value in a preset first variable, searching a prestored heavy-load power array HotBuff _ zhongZai, arranging the corresponding relation between the value of the first variable and the heating power gear of the heated body in the heavy-load power array, finding the heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, heating the heated body according to the found heating power gear, and returning to the step a.
In the initial power array HotBuff, the light-load power array HotBuff _ QingZai and the heavy-load power array HotBuff _ zhongZai, the heating power gear of the heating body corresponding to the same first variable value in the heating power gear of the heating body corresponding to the heavy-load power array HotBuff _ zhongZai is larger than the heating power gear of the heating body corresponding to the initial power array HotBuff, and the heating power gear of the heating body corresponding to the initial power array HotBuff is larger than the heating power gear of the heating body corresponding to the light-load power array HotBuff _ QingZai.
Compared with the prior art, the invention has the advantages that: the actual temperature change (rising or falling) of the heated body and the magnitude of the uprush temperature are monitored in real time, and the heating power gear of the heated body is adjusted in real time, so that the temperature is accurately controlled; judging whether the food quantity is reduced (for example: the food is dried by water) by an upper temperature value under the condition of high power so as to convert the food quantity into low power or increasing the power by detecting the temperature drop for a fixed time period; under the condition of low power, whether the food quantity is increased is judged by detecting the temperature change (rising or falling) in a fixed time period, so that whether the food quantity is converted into high power is determined; in the whole cooking process, the accurate automatic adjustment of the power can be realized according to the change of the amount of the food, so that the accurate temperature control is realized.
Drawings
Fig. 1 is a flow chart of a method for accurately controlling the temperature of a household appliance according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The method for accurately controlling the temperature of the household appliance as shown in fig. 1 comprises the following steps:
step 1, setting a target temperature, namely Tset, setting an initial uprush temperature, namely ShangChong _ Temp;
step 2, measuring the actual temperature Tc of the heated body, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and entering step 3; if the actual temperature Tc of the heated body is less than the target temperature Tset, calculating the difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored initial power array HotBuff according to the value of the first variable, setting a corresponding relation between the value of the first variable and the heating power gear of the heated body in the initial power array HotBuff, finding the heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, and heating the heated body according to the found heating power gear; then returning to the step 2;
step 3, recording the highest temperature in the actual temperature of the heated body, recording the highest temperature as Tmax, calculating the difference value between the Tmax and the Tset, recording the difference value as an upper-thrust temperature Up _ Temp, comparing the upper-thrust temperature Up _ Temp with an initial upper-thrust temperature ShangChong _ Temp, judging the upper-thrust temperature Up _ Temp to be light load if the upper-thrust temperature Up _ Temp is greater than the initial upper-thrust temperature ShangChong _ Temp, starting a light load mark position, and enabling the heated body to work according to a light load mode; if the uprush temperature Up _ Temp is not more than the initial uprush temperature, judging that the overload is caused, starting the position of the overload mark, and enabling the heating body to work in a overload mode;
the work flow of the light load mode is as follows:
step A, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and returning to the step 2; if the actual temperature Tc of the heated body is less than the target temperature Tset, entering the step B;
b, calculating a difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored light load power array HotBuff _ QingZai according to the value of the first variable, setting a corresponding relation between the value of the first variable and a heating power gear of the heating body in the light load power array HotBuff _ QingZai, finding a heating power gear of the heating body corresponding to the value of the first variable according to the value of the first variable, heating the heating body according to the found heating power gear, and then entering the step C;
step C, after delaying the first preset time, detecting the actual temperature Tc of the heated body again, and if the actual temperature of the heated body is more than or equal to the previous actual temperature, returning to the step A; if the actual temperature of the heated body is lower than the previous actual temperature, the temperature is lowered to the mark position, and the heating body enters a heavy-load mode;
the work flow of the heavy load mode is as follows:
step a, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and then entering step 3; if the actual temperature Tc of the heated body is less than the target temperature Tset, entering the step b;
b, when the actual temperature Tc of the heated body is smaller than the target temperature Tset, calculating the difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored heavy-load power array HotBuff _ zhongZai according to the value of the first variable, setting a corresponding relation between the value of the first variable and the heating power gear of the heated body in the heavy-load power array HotBuff _ zhongZai, finding a heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, heating the heated body according to the found heating power gear, and then entering the step c;
c, after delaying for a second preset time, detecting the actual temperature of the heated body again, and returning to the step a if the actual temperature of the heated body is greater than or equal to the previous actual temperature; if the actual temperature of the heated body is lower than the previous actual temperature, calculating the difference value between the actual temperature of the heated body and the actual temperature of the heated body, storing the difference value between the actual temperature of the heated body and the actual temperature of the heated body in a preset second variable, adding the difference value between the target temperature and the actual temperature of the heated body to the value of the second variable, storing the difference value in a preset first variable, searching a prestored heavy-load power array HotBuff _ zhongZai, arranging the corresponding relation between the value of the first variable and the heating power gear of the heated body in the heavy-load power array, finding the heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, heating the heated body according to the found heating power gear, and returning to the step a.
In this embodiment, the first preset time and the second preset time are both 4 s; in the initial power array HotBuff, the light-load power array HotBuff _ QingZai and the heavy-load power array HotBuff _ zhungZai, in the heating body heating power gear corresponding to the same first variable value, the heating body heating power gear corresponding to the heavy-load power array HotBuff _ zhungZai is larger than the heating body heating power gear corresponding to the initial power array HotBuff, and the heating body heating power gear corresponding to the initial power array HotBuff is larger than the heating body heating power gear corresponding to the light-load power array HotBuff _ QingZai.
Specific embodiments are given below, and the initial power array HotBuff, the light-load power array HotBuff _ QingZai, and the heavy-load power array HotBuff _ zhangzai are explained:
HotBuff [ first variable ] ═ f
{50,50,55,55,60,60,60,65,65,70,70,70,75,75,75,75,75,76,76,76,76,76,77,77,77,77,78,78,78,78,79,79,79,79,79,80,80,80,80,81,81,81,82,82,82,82,83,83,83,83,84,84,84,85,85,85,85,86,86,86,86,87,87,87,88,88,88,88,89,89,89,89,89,90,91,92,93,94,95,96,97,98,99,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100}；
Wherein, the value in HotBuff [ the first variable ] corresponds to the duty ratio of the full-load heating power of the heating body, the full-load heating power of the heating body is divided into 100 parts, and the value in HotBuff [ the first variable ], such as 85 percent, corresponds to 85 percent of the full-load heating power; when the value of the first variable is 1, HotBuff [1] is corresponded, when the value of the first variable is 2, HotBuff [2] is corresponded, when the value of the first variable is 3, HotBuff [3] is corresponded, and the like;
HotBuff QingZai [ first variable ] ═
{10,10,11,12,13,14,15,17,20,25,25,26,26,27,27,28,29,30,30,30,30,30,30,30,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,83,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100}；
Wherein, the value in HotBuff _ QingZai [ the first variable ] corresponds to the duty ratio of the full-load heating power of the heating body, the full-load heating power of the heating body is divided into 100 parts, and the value in HotBuff _ QingZai [ the first variable ], such as 85%, corresponds to 85% of the full-load heating power; when the value of the first variable is 1, the first variable corresponds to HotBuff _ QingZai [1], when the value of the first variable is 2, the first variable corresponds to HotBuff _ QingZai [2], when the value of the first variable is 3, the first variable corresponds to HotBuff _ QingZai [3], and so on;
HotBuff _ ZhongZai [ first variable ] ═
{35,35,45,50,55,55,65,65,65,70,71,72,73,74,75,76,77,78,78,79,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,95,95,96,96,97,97,97,98,98,98,99,99,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100}；
Wherein, the value in HotBuff _ ZhongZai [ first variable ] ] corresponds to the duty ratio of the full-load heating power of the heating body, the full-load heating power of the heating body is divided into 100 parts, and the value in HotBuff _ ZhongZai [ first variable ], such as 85 percent, corresponds to 85 percent of the full-load heating power; and corresponds to HotBuff _ ZhongZai [1] when the value of the first variable is 1, corresponds to HotBuff _ ZhongZai [2] when the value of the first variable is 2, corresponds to HotBuff _ ZhongZai [3] when the value of the first variable is 3, and so on.
Claims (2)
1. An accurate temperature control method for household appliances is characterized by comprising the following steps:
step 1, setting a target temperature, namely Tset, setting an initial uprush temperature, namely ShangChong _ Temp;
step 2, measuring the actual temperature Tc of the heated body, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and then entering step 3; if the actual temperature Tc of the heated body is less than the target temperature Tset, calculating the difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored initial power array HotBuff according to the value of the first variable, setting a corresponding relation between the value of the first variable and the heating power gear of the heated body in the initial power array HotBuff, finding the heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, and heating the heated body according to the found heating power gear; then returning to the step 2;
step 3, recording the highest temperature in the actual temperature of the heated body, recording the highest temperature as Tmax, calculating the difference value between the Tmax and the Tset, recording the difference value as an upper-thrust temperature Up _ Temp, comparing the upper-thrust temperature Up _ Temp with an initial upper-thrust temperature ShangChong _ Temp, judging the upper-thrust temperature Up _ Temp to be light load if the upper-thrust temperature Up _ Temp is greater than the initial upper-thrust temperature ShangChong _ Temp, starting a light load mark position, and enabling the heated body to work according to a light load mode; if the uprush temperature Up _ Temp is not more than the initial uprush temperature, judging that the overload is caused, starting the position of the overload mark, and enabling the heating body to work in a overload mode;
the work flow of the light load mode is as follows:
step A, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and returning to the step 2; if the actual temperature Tc of the heated body is less than the target temperature Tset, entering the step B;
b, calculating a difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored light load power array HotBuff _ QingZai according to the value of the first variable, setting a corresponding relation between the value of the first variable and a heating power gear of the heating body in the light load power array HotBuff _ QingZai, finding a heating power gear of the heating body corresponding to the value of the first variable according to the value of the first variable, heating the heating body according to the found heating power gear, and then entering the step C;
step C, after delaying the first preset time, detecting the actual temperature Tc of the heated body again, and if the actual temperature of the heated body is more than or equal to the previous actual temperature, returning to the step A; if the actual temperature of the heated body is lower than the previous actual temperature, the temperature is lowered to the mark position, and the heating body enters a heavy-load mode;
the work flow of the heavy load mode is as follows:
step a, comparing the actual temperature Tc of the heated body with the target temperature Tset, if the actual temperature Tc of the heated body is more than or equal to the target temperature Tset, stopping heating the heated body, and then entering step 3; if the actual temperature Tc of the heated body is less than the target temperature Tset, entering the step b;
b, when the actual temperature Tc of the heated body is smaller than the target temperature Tset, calculating the difference value between the target temperature Tset and the actual temperature Tc of the heated body, storing the difference value between the target temperature Tset and the actual temperature Tc of the heated body in a preset first variable, searching a pre-stored heavy-load power array HotBuff _ zhongZai according to the value of the first variable, setting a corresponding relation between the value of the first variable and the heating power gear of the heated body in the heavy-load power array HotBuff _ zhongZai, finding a heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, heating the heated body according to the found heating power gear, and then entering the step c;
c, after delaying for a second preset time, detecting the actual temperature of the heated body again, and returning to the step a if the actual temperature of the heated body is greater than or equal to the previous actual temperature; if the actual temperature of the heated body is lower than the previous actual temperature, calculating the difference value between the actual temperature of the heated body and the actual temperature of the heated body, storing the difference value between the actual temperature of the heated body and the actual temperature of the heated body in a preset second variable, adding the difference value between the target temperature and the actual temperature of the heated body to the value of the second variable, storing the difference value in a preset first variable, searching a prestored heavy-load power array HotBuff _ zhongZai, arranging the corresponding relation between the value of the first variable and the heating power gear of the heated body in the heavy-load power array, finding the heating power gear of the heated body corresponding to the value of the first variable according to the value of the first variable, heating the heated body according to the found heating power gear, and returning to the step a.
2. The method for accurately controlling the temperature of the household appliance according to claim 1, wherein the method comprises the following steps: in the initial power array HotBuff, the light-load power array HotBuff _ QingZai and the heavy-load power array HotBuff _ zhungZai, in the heating body heating power gear corresponding to the same first variable value, the heating body heating power gear corresponding to the heavy-load power array HotBuff _ zhungZai is larger than the heating body heating power gear corresponding to the initial power array HotBuff, and the heating body heating power gear corresponding to the initial power array HotBuff is larger than the heating body heating power gear corresponding to the light-load power array HotBuff _ QingZai.
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| "低温热水地板辐射采暖系统智能温度控制器的研究";董建征;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20120215;C038-575 * |
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