CN112034901A - Accurate temperature control method for electric heating appliance - Google Patents
Accurate temperature control method for electric heating appliance Download PDFInfo
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- CN112034901A CN112034901A CN202010995669.4A CN202010995669A CN112034901A CN 112034901 A CN112034901 A CN 112034901A CN 202010995669 A CN202010995669 A CN 202010995669A CN 112034901 A CN112034901 A CN 112034901A
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- G05D23/19—Control of temperature characterised by the use of electric means
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Abstract
The accurate temperature control method for the electric heating appliance provided by the invention controls and adjusts the temperature in stages in the heating process, firstly judges the cold and hot machine according to the initial temperature in the heating cavity, further heats the electric heating appliance to the initial temperature by full power first flushing, and then heats the electric heating appliance from the initial temperature in a manner of combining temperature stages with time periods, so that the real-time temperature in the heating cavity approaches or reaches the target temperature. On one hand, the heating time and the stopping time are adjusted by combining the temperature division section with the temperature division period according to the change of the real-time temperature in the temperature rising process, the temperature control is more accurate, and the temperature deviation value is small; on the other hand, the food is quickly heated to a proper temperature through first-flushing heating, the time required for reaching the target temperature is shortened, and then a progressive heating mode combining temperature division and time period is adopted, so that proper time is provided for various reaction changes of food materials, the food can be correspondingly changed in different temperature ranges in the heating process, and the effect of better color, aroma and taste is achieved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of temperature control, in particular to an accurate temperature control method for an electric heating appliance.
[ background of the invention ]
Electric heating appliances such as an oven, an induction cooker and the like generally adopt a fixed mode or a fixed gear mode to control temperature, heating is stopped after full-power heating is carried out to a target temperature in a heating process according to a mode or a gear selected by a user, and heating is carried out when a temperature value to be detected does not reach the target temperature; on the other hand, in the heating process, food components are changed, such as water in the food is reduced along with the increase of temperature, protein begins to denature, starch is gelatinized, fiber is shrunk, the leaching speed of inorganic salt and cell sap is accelerated, and enzymolysis reaction, esterification reaction and the like are carried out, so that attractive color, pungent aroma, slobbering taste and ingenious shape are formed, the existing temperature control method is used for heating the food to the target temperature at full power in the heating process, the time for the food to change is greatly shortened, and the food is difficult to achieve ideal color, aroma and taste.
[ summary of the invention ]
The invention aims to provide an accurate temperature control method for an electric heating appliance, which solves the problem of large temperature control deviation value of the electric heating appliance in the prior art.
In order to solve the above problems, the present invention provides the following technical solutions:
the precise temperature control method for the electric heating appliance comprises the following steps:
step 1: setting a target temperature Tset, and searching a preset target temperature and temperature control gear comparison table according to the target temperature Tset to determine a temperature control gear Tctrl where the target temperature is located; searching a preset temperature control gear and a first flushing temperature comparison table according to the temperature control gear Tctrl to determine a first flushing temperature Tsc;
step 2: detecting an initial temperature Ts in the heating cavity and judging a cold machine and a hot machine;
comparing the initial temperature Ts with the first rush temperature Tsc obtained from step 1;
if Ts < Tsc, judging that the current state is a cold state, taking a backup Tsc temperature value as the starting temperature T0 of the step 3, heating to the starting temperature T0 at full power, and then executing the step 3;
if Ts is greater than Tsc, judging that the current state is a heat engine state, and searching a preset temperature control gear and temperature compensation difference comparison table to determine a temperature compensation difference Tbc; backing up the temperature value of Tctrl-Tbc as the starting temperature T0 of the step 3, heating to the starting temperature T0 in full power, and then executing the step 3;
and step 3: the heating is carried out from the starting temperature T0 in a way of combining temperature division and time period, so that the real-time temperature in the heating cavity approaches or reaches the target temperature.
In the above method for accurately controlling temperature of an electric heating appliance, in step 3, the combination of temperature division and time period means: sampling by an ADC to obtain a real-time temperature Tx in a heating cavity, confirming a temperature section where the real-time temperature Tx is located, and correspondingly obtaining heating time Xx and a heating period Sx according to the temperature section; then heating the heating cavity for Xx seconds, and stopping heating for Sx-Xx seconds; the ADC continues to sample to obtain a new real-time temperature Tx ', a temperature section where the new real-time temperature Tx' is located is confirmed, and then heating time Xx 'and a heating period Sx' are correspondingly obtained according to the temperature section; then heating the heating cavity for Xx ' seconds, and stopping heating for Sx ' -Xx ' seconds; and circulating in sequence to enable the real-time temperature in the heating cavity to approach or reach the target temperature.
In the above accurate temperature control method for an electric heating appliance, in step 3, a preset temperature control gear and temperature section comparison table is searched according to a temperature control gear Tctrl, and a plurality of temperature sections Tc1 and Tc2 … TcN corresponding to the temperature control gear Tctrl are obtained; confirming the heating time X1 and X2 … XN corresponding to each temperature section and the heating period S1 and S2 … SN corresponding to each temperature section according to the temperature section and heating time comparison table and the temperature section and heating period comparison table; the temperature section where the real-time temperature Tx is located is confirmed in the temperature sections Tc1 and Tc2 … TcN, and then the heating time Xx and the heating period Sx are correspondingly obtained according to the confirmed temperature section.
According to the accurate temperature control method for the electric heating appliance, a preset temperature control gear is searched according to the temperature control gear Tctrl, the global time period Mtrl corresponding to the temperature control gear Tctrl is confirmed according to the global time period comparison table, and after heating is forcibly stopped for M seconds when one global time period is over, the next global time period is started.
According to the accurate temperature control method for the electric heating appliance, when the temperature is sampled, a plurality of temperature data points are collected through the ADC and averaged, so that a temperature value is obtained.
According to the accurate temperature control method of the electric heating appliance, when the average value is obtained, the rest average values of the plurality of temperature data points are obtained after the highest value and the high and low values are removed, so that the temperature value is obtained.
The accurate temperature control method of the electric heating appliance at least collects 10-20 temperature data points.
Compared with the prior art, the invention has the following advantages:
1. the accurate temperature control method for the electric heating appliance provided by the invention controls and adjusts the temperature in stages in the heating process, firstly judges the cold and hot machine according to the initial temperature in the heating cavity, further heats the electric heating appliance to the initial temperature by full power first flushing, and then heats the electric heating appliance from the initial temperature in a manner of combining temperature stages with time periods, so that the real-time temperature in the heating cavity approaches or reaches the target temperature. On one hand, the heating time and the stopping time are adjusted by combining the temperature division section with the temperature division period according to the change of the real-time temperature in the temperature rising process, the temperature control is more accurate, and the temperature deviation value is small; on the other hand, the food is quickly heated to a proper temperature through first-time heating, the time required for reaching the target temperature is shortened, and then the proper time is provided for various reaction changes of food materials through a progressive heating mode combining temperature division and time period, so that the food can be correspondingly changed in different temperature ranges in the heating process, glaring colors, strong fragrance, delicious taste and ingenious shape are formed, and the effect of better color, fragrance and taste is achieved.
2. The accurate temperature control method of the electric heating appliance provided by the invention not only controls the temperature by executing different heating time Xx in different temperature sections for the real-time temperature Tx, but also controls the temperature by executing different heating periods Sx in different temperature sections in combination with the real-time temperature Tx, and simultaneously different temperature control gears Tctrl are provided with temperature sections matched with the temperature control gears, so that a temperature control mode combining grading, temperature division and period division is formed, the temperature control is more accurate, the accurate temperature control method is beneficial to providing more proper heating time for food in different temperature control gears according to different temperature sections, the food is more fully reacted in the heating process, and a more ideal heating effect is achieved.
3. According to the accurate temperature control method for the electric heating appliance, the heating time is further controlled through the global time period, the influence on the food heating effect caused by excessive heating is avoided, and another guarantee is provided for accurate temperature control.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a temperature control situation in a cold state according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of temperature control in a thermal engine state according to an embodiment of the present invention.
FIG. 3 is a flow chart of temperature control according to an embodiment of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
Referring to fig. 1 to 3, the present embodiment provides a precise temperature control method for an electrical heating device.
The embodiment comprises the following steps:
step 1: setting a target temperature Tset, and searching a preset target temperature and temperature control gear comparison table according to the target temperature Tset, wherein the preset target temperature and temperature control gear comparison table is shown in a table 1 to determine a temperature control gear Tctrl where the target temperature is located; then, searching a preset temperature control gear and first flushing temperature comparison table according to the temperature control gear Tctrl, and determining the first flushing temperature Tsc as shown in the table 2;
TABLE 1 target temp. and temp. control gear comparison table
| Target temperature | Tset 1 | Tset 2 | Tset 3 | …… | Tset N |
| Temperature control gear | Tctrl 1 | Tctrl 2 | Tctrl 3 | …… | Tctrl N |
TABLE 2 temperature control gear and initial temperature comparison table
| Temperature control gear | Tctrl 1 | Tctrl 2 | Tctrl 3 | …… | Tctrl N |
| First impact temperature | Tsc 1 | Tsc 2 | Tsc 3 | …… | Tsc N |
Step 2: detecting an initial temperature Ts in the heating cavity and judging a cold machine and a hot machine;
comparing the initial temperature Ts with the first rush temperature Tsc obtained from step 1;
if Ts < Tsc, judging that the current state is a cold state, taking a backup Tsc temperature value as the starting temperature T0 of the step 3, heating to the starting temperature T0 at full power, and then executing the step 3;
if Ts is greater than Tsc, judging that the current state is a heat engine state, and searching a preset temperature control gear and temperature compensation difference comparison table as shown in table 3 to determine a temperature compensation difference Tbc; backing up the temperature value of Tctrl-Tbc as the starting temperature T0 of the step 3, heating to the starting temperature T0 in full power, and then executing the step 3;
TABLE 3 temperature control gear and temperature compensation difference comparison table
| Temperature control gear | Tctrl 1 | Tctrl 2 | Tctrl 3 | …… | Tctrl N |
| Temperature compensated difference | Tbc 1 | Tbc 2 | Tbc 3 | …… | Tbc N |
And step 3: the heating is carried out from the starting temperature T0 in a way of combining temperature division and time period, so that the real-time temperature in the heating cavity approaches or reaches the target temperature. Specifically, a preset temperature control gear and temperature section comparison table is searched according to the temperature control gear Tctrl, and as shown in table 4, a plurality of temperature sections Tc1 and Tc2 … TcN corresponding to the temperature control gear Tctrl are obtained; confirming the heating times X1 and X2 … XN corresponding to each temperature segment and the heating periods S1 and S2 … SN corresponding to each temperature segment according to the temperature segment and heating time comparison table, as shown in Table 5, and the temperature segment and heating period comparison table, as shown in Table 6;
TABLE 4 temperature control gear and temperature segment contrast table
| Temperature control gear | Tctrl 1 | …… | Tctrl N |
| Temperature section | Tc1’,Tc2’…TcN’ | …… | Tc1,Tc2…TcN |
TABLE 5 temperature zone versus heating time
| Temperature section | Tc1 | Tc2 | Tc3 | …… | TcN |
| Time of heating | X1 | X2 | X3 | …… | XN |
TABLE 6 temperature section vs. heating period comparison Table
| Temperature section | Tc1 | Tc2 | Tc3 | …… | TcN |
| Heating cycle | S1 | S2 | S3 | …… | SN |
Sampling by an ADC to obtain a real-time temperature Tx in the heating cavity, confirming a temperature section where the real-time temperature Tx is located in the temperature sections Tc1 and Tc2 … TcN, and correspondingly obtaining heating time Xx and a heating period Sx according to the temperature section; then heating the heating cavity for Xx seconds, and stopping heating for Sx-Xx seconds; the ADC continues to sample to obtain a new real-time temperature Tx ', a temperature section where the new real-time temperature Tx' is located is confirmed, and then heating time Xx 'and a heating period Sx' are correspondingly obtained according to the temperature section; then heating the heating cavity for Xx ' seconds, and stopping heating for Sx ' -Xx ' seconds; and circulating in sequence to enable the real-time temperature in the heating cavity to approach or reach the target temperature. Not only to real-time temperature Tx different heating time Xx of execution in the temperature section of difference come the accuse temperature, and combine real-time temperature Tx to carry out different heating cycle Sx in different temperature sections and come the control by temperature change, different accuse temperature gear Tctrl is equipped with the temperature section that matches with this accuse temperature gear simultaneously, form the stepping, divide the temperature section, divide the accuse temperature mode that the cycle combined together, temperature control is more accurate, be favorable to controlling the temperature gear in the difference, provide more suitable heating time for food according to the temperature section of difference, make food react more fully in the heating process, reach more ideal heating effect.
Meanwhile, when heating is performed by the starting temperature T0 in a manner of combining temperature division with time period, a preset comparison table of the temperature control gear and the global time period is searched according to the temperature control gear Tctrl, as shown in table 7, to confirm the global time period Mctrl corresponding to the temperature control gear Tctrl, and after heating is forcibly stopped for M seconds when one global time period ends, the next global time period is started. In this embodiment, heating is forcibly stopped for 1 to 2 seconds when a global time period ends, and the heating time is further controlled through the global time period, which is beneficial to avoiding the food heating effect from being affected by excessive heating, and provides another guarantee for accurate temperature control.
TABLE 7 temperature control gear and Global time period comparison Table
| Temperature control gear | Tctrl 1 | Tctrl 2 | Tctrl 3 | …… | Tctrl N |
| Global time period | Mctrl 1 | Mctrl 2 | Mctrl 3 | …… | Mctrl N |
During temperature sampling, a plurality of temperature data points are collected through the ADC and averaged to obtain a temperature value, at least 10-20 temperature data points are collected during averaging, in the embodiment, 18 temperature data points are collected during sampling, and the rest of the 18 temperature data points are averaged after the highest value and the high-low value are removed, so that the temperature value is obtained. The initial temperature Ts and the real-time temperature Tx are sampled by adopting the method, so that more accurate initial temperature and real-time temperature are obtained, and more accurate temperature control is facilitated.
The accurate temperature control method for the electric heating appliance provided by the invention controls and adjusts the temperature in stages in the heating process, firstly judges the cold and hot machine according to the initial temperature in the heating cavity, further heats the electric heating appliance to the initial temperature by full power first flushing, and then heats the electric heating appliance from the initial temperature in a manner of combining temperature stages with time periods, so that the real-time temperature in the heating cavity approaches or reaches the target temperature. On one hand, the heating time and the stopping time are adjusted by combining the temperature division section with the temperature division period according to the change of the real-time temperature in the temperature rising process, the temperature control is more accurate, and the temperature deviation value is small; on the other hand, the food is quickly heated to a proper temperature through first-time heating, the time required for reaching the target temperature is shortened, and then the proper time is provided for various reaction changes of food materials through a progressive heating mode combining temperature division and time period, so that the food can be correspondingly changed in different temperature ranges in the heating process, glaring colors, strong fragrance, delicious taste and ingenious shape are formed, and the effect of better color, fragrance and taste is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The accurate temperature control method of the electric heating appliance is characterized in that: the method comprises the following steps:
step 1: setting a target temperature Tset, and searching a preset target temperature and temperature control gear comparison table according to the target temperature Tset to determine a temperature control gear Tctrl where the target temperature is located; searching a preset temperature control gear and a first flushing temperature comparison table according to the temperature control gear Tctrl to determine a first flushing temperature Tsc;
step 2: detecting an initial temperature Ts in the heating cavity and judging a cold machine and a hot machine;
comparing the initial temperature Ts with the first rush temperature Tsc obtained from step 1;
if Ts < Tsc, judging that the current state is a cold state, taking a backup Tsc temperature value as the starting temperature T0 of the step 3, heating to the starting temperature T0 at full power, and then executing the step 3;
if Ts is greater than Tsc, judging that the current state is a heat engine state, and searching a preset temperature control gear and temperature compensation difference comparison table to determine a temperature compensation difference Tbc; backing up the temperature value of Tctrl-Tbc as the starting temperature T0 of the step 3, heating to the starting temperature T0 in full power, and then executing the step 3;
and step 3: the heating is carried out from the starting temperature T0 in a way of combining temperature division and time period, so that the real-time temperature in the heating cavity approaches or reaches the target temperature.
2. The accurate temperature control method of the electric heating appliance according to claim 1, characterized in that: in the step 3, the combination mode of temperature division and time period is as follows: sampling by an ADC to obtain a real-time temperature Tx in a heating cavity, confirming a temperature section where the real-time temperature Tx is located, and correspondingly obtaining heating time Xx and a heating period Sx according to the temperature section; then heating the heating cavity for Xx seconds, and stopping heating for Sx-Xx seconds; the ADC continues to sample to obtain a new real-time temperature Tx ', a temperature section where the new real-time temperature Tx' is located is confirmed, and then heating time Xx 'and a heating period Sx' are correspondingly obtained according to the temperature section; then heating the heating cavity for Xx ' seconds, and stopping heating for Sx ' -Xx ' seconds; and circulating in sequence to enable the real-time temperature in the heating cavity to approach or reach the target temperature.
3. The accurate temperature control method of the electric heating appliance according to claim 2, characterized in that: in the step 3, a preset temperature control gear and temperature section comparison table is searched according to a temperature control gear Tctrl, and a plurality of temperature sections Tc1 and Tc2 … TcN corresponding to the temperature control gear Tctrl are obtained; confirming the heating time X1 and X2 … XN corresponding to each temperature section and the heating period S1 and S2 … SN corresponding to each temperature section according to the temperature section and heating time comparison table and the temperature section and heating period comparison table; the temperature section where the real-time temperature Tx is located is confirmed in the temperature sections T1 and T2 … TN, and then the heating time Xx and the heating period Sx are correspondingly obtained according to the confirmed temperature section.
4. The accurate temperature control method of the electric heating appliance according to claim 2 or 3, characterized in that: and searching a preset temperature control gear and a global time period comparison table according to the temperature control gear Tctrl to confirm the global time period Mtrl corresponding to the temperature control gear Tctrl, and starting the next global time period after forcibly stopping heating for M seconds when one global time period is finished.
5. The accurate temperature control method of the electric heating appliance according to claim 1, characterized in that: during temperature sampling, a plurality of temperature data points are collected through the ADC and averaged, so that a temperature value is obtained.
6. The accurate temperature control method of the electric heating appliance according to claim 5, characterized in that: when averaging, the rest of the plurality of temperature data points excluding the highest value and the high and low values are averaged to obtain a temperature value.
7. The accurate temperature control method of the electric heating appliance according to claim 5, characterized in that: at least 10-20 temperature data points were collected.
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| CN112839394A (en) * | 2020-12-30 | 2021-05-25 | 中科芯集成电路有限公司 | Heating control method and intelligent household appliance |
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