CN107343742B - Electric cooker and anti-condensation control method thereof - Google Patents
Electric cooker and anti-condensation control method thereof Download PDFInfo
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- CN107343742B CN107343742B CN201610301511.6A CN201610301511A CN107343742B CN 107343742 B CN107343742 B CN 107343742B CN 201610301511 A CN201610301511 A CN 201610301511A CN 107343742 B CN107343742 B CN 107343742B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/004—Cooking-vessels with integral electrical heating means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
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Abstract
The invention discloses an electric cooker and an anti-condensation control method thereof, wherein the method comprises the following steps: when the main heating body starts to heat or before heating, the auxiliary heating body is controlled to heat the transparent window at a preset heating power; detecting in real time to obtain a first temperature value in the inner pot of the electric cooker and a second temperature value of the transparent window body; comparing the first temperature value with the second temperature value and obtaining a difference value between the first temperature value and the second temperature value; and dynamically adjusting the heating power of the auxiliary heating body according to the first temperature value and the second temperature value, wherein when the relative difference value between the second temperature value and the first temperature value is less than or equal to a first positive value, the heating power of the auxiliary heating body is increased so as to enable the second temperature of the transparent window to be greater than the first temperature value. The invention avoids condensation and water mist generated because the temperature of the transparent window is lower than the temperature in the inner pot, further avoids the fuzziness caused by the condensation of water vapor of the transparent window, and is convenient for a user to observe the cooking condition in the inner pot.
Description
Technical Field
The invention relates to the technical field of cooking appliances, in particular to an electric cooker and an anti-condensation control method of the electric cooker.
Background
The electric cooker is a common cooking appliance for cooking rice and porridge, generally comprising a cooker body and an upper cover, wherein a main heating body and an inner pot are arranged in the cooker body, rice to be cooked is filled in the inner pot, after the electric cooker is powered on, the main heating body heats, the temperature of the inner pot rises along with the main heating body, and therefore the rice and water in the inner pot are heated. Most of the existing electric rice cooker covers are made of opaque plastics, and after the upper cover is covered, the cooking state of rice in the inner pot cannot be judged from the outside. The food can be observed only by opening the upper cover, which causes steam loss and heat loss in the pot. Furthermore, the upper cover of the electric cooker with the transparent window appears, but in the process of heating the rice-water mixture in the inner pot of the electric cooker, part of water is changed into steam and condensed on the transparent window at the inner side of the upper cover, so that the transparent window is blurred and is inconvenient for a user to observe.
Disclosure of Invention
The invention mainly aims to provide an electric cooker and an electric cooker anti-condensation control method, and aims to solve the technical problems that a transparent window of the electric cooker is blurred due to condensation of water vapor and is inconvenient for a user to observe.
In order to achieve the purpose, the invention provides an electric cooker anti-condensation control method, the electric cooker comprises an inner pot, an upper cover covered on the inner pot, a first temperature sensing probe and a second temperature sensing probe, a transparent window is arranged on the upper cover, the electric cooker comprises a main heating body for heating the inner pot and an auxiliary heating body for heating the transparent window, the first temperature sensing probe detects the temperature in the inner pot of the electric cooker, the second temperature sensing probe detects the temperature of the transparent window,
the anti-condensation control method of the electric cooker comprises the following steps:
when the main heating body starts to heat or before heating, the auxiliary heating body is controlled to heat the transparent window at a preset heating power;
detecting and acquiring a first temperature value in the inner pot of the electric cooker and a second temperature value of the transparent window body in real time;
comparing the first temperature value with the second temperature value and acquiring a difference value between the first temperature value and the second temperature value;
and dynamically adjusting the heating power of the auxiliary heating body according to the first temperature value and the second temperature value, wherein when the relative difference value between the second temperature value and the first temperature value is less than or equal to a first positive value, the heating power of the auxiliary heating body is increased so as to enable the second temperature of the transparent window to be greater than the first temperature value.
Preferably, the electric cooker also comprises a third temperature-sensing probe and a timer for detecting the temperature of the bottom of the inner pot,
real-time detection obtains first temperature value in the pot in the electricity rice cooker, and still include after the step of the second temperature value of transparent window body:
identifying a cooking stage of the electric cooker according to the heating duration counted by the timer when the autonomous heating body starts to heat, a third temperature value acquired by a third temperature sensing probe and/or a first temperature value acquired by a first temperature sensing probe, wherein the cooking stage comprises a water absorption stage, a heating stage and a boiling stage;
the step of dynamically adjusting the heating power of the auxiliary heating body according to the first temperature value and the second temperature value comprises the following steps:
when the electric cooker is in a water absorption stage, controlling the auxiliary heating body to heat the transparent window at a first heating power;
when the electric cooker is in a heating stage, controlling the auxiliary heating body to heat the transparent window with second heating power, wherein if the relative difference value between the second temperature value and the first temperature value is less than or equal to a first positive value, the second heating power is increased;
when the electric cooker is in a boiling stage, controlling the auxiliary heating body to heat the transparent window with third heating power, wherein if the second temperature value is less than a preset boiling temperature value, the third heating power is increased;
the first heating power is greater than the third heating power, the third heating power is greater than the second heating power, the electric cooker is in any cooking stage, and if the second temperature value is greater than a preset limit temperature value, the current heating power of the auxiliary heating body is reduced or set to zero.
Preferably, the rice cooking stage of the electric cooker also comprises a rice stewing stage,
when the electric cooker is in a boiling stage, the step of controlling the auxiliary heating body to heat the transparent window with a third heating power further comprises the following steps:
when the electric cooker is in a stewing stage, the auxiliary heating body is controlled to heat the transparent window at a fourth heating power, wherein if the second temperature value is less than the preset stewing temperature value, the third heating power is increased, and the fourth heating power is less than or equal to the third heating power.
Preferably, the rice cooking stage of the electric cooker also comprises a heat preservation stage,
when the electric cooker is in a stewing stage, the step of controlling the auxiliary heating body to heat the transparent window with fourth heating power further comprises the following steps:
when the electric cooker is in a heat preservation stage, the auxiliary heating body is controlled to heat the transparent window with fifth heating power, wherein if the second temperature value is larger than a preset heat preservation temperature value, the fifth heating power is reduced, if the second temperature value is smaller than or equal to the preset heat preservation temperature value, the fifth heating power is increased, and the fifth heating power is smaller than the second heating power.
The invention also provides an electric cooker which comprises a cooker body, an upper cover, a first temperature sensing probe, a second temperature sensing probe and an inner pot movably arranged in the cooker body, wherein the upper cover is arranged on the cooker body to open or close the cooker body, the bottom of the inner pot is provided with a main heating body, the upper cover is provided with a transparent window, when the cooker body is in a closed state, the transparent window faces the inner pot, the transparent window is provided with an auxiliary heating body for heating the transparent window to prevent the transparent window from generating condensation, the first temperature sensing probe detects the temperature in the inner pot of the electric cooker, and the second temperature sensing probe detects the temperature on the transparent window.
Preferably, the electric cooker further comprises a control chip arranged inside the cooker body, the auxiliary heating body and the main heating body are electrically connected with the control chip, and the control chip controls the heating temperature of the auxiliary heating body and the heating temperature of the main heating body.
Preferably, the transparent window comprises a channel penetrating through the upper cover and a first transparent member clamped in the channel, and the auxiliary heating body is a metal conductive layer arranged on the surface or inside of the first transparent member.
Preferably, the transparent window further comprises a second transparent piece, and the second transparent piece is clamped in the channel and located on one side, away from the inner pot, of the first transparent piece.
Preferably, the first transparent part, the second transparent part and the channel jointly enclose a window cavity, a steam valve is further arranged on the upper cover, and the window cavity is communicated with the steam valve.
Preferably, the electric cooker further comprises a third temperature sensing probe for detecting the temperature at the bottom of the inner cooker, a timer is arranged in the control chip, and the first temperature sensing probe, the second temperature sensing probe and the third temperature sensing probe are all electrically connected with the control chip.
According to the invention, when the main heating body starts to heat, the auxiliary heating body is controlled to heat the transparent window with the preset heating power, the first temperature value acquired by the first temperature sensing probe and the second temperature value acquired by the second temperature sensing probe are acquired, and then the heating power of the auxiliary heating body is dynamically adjusted according to the first temperature value and the second temperature value, so that when the temperature of the transparent window is close to that of the inner pot, the heating power of the auxiliary heating body is increased to improve the temperature of the transparent window, the second temperature of the transparent window is higher than the first temperature value, condensation and water mist caused by the fact that the temperature of the transparent window is lower than the temperature of the inner pot are avoided, and further the situation that the transparent window is blurred due to condensation of water vapor is avoided, and a user can conveniently observe the cooking condition in the inner pot.
Drawings
FIG. 1 is a sectional view of an electric rice cooker according to an embodiment of the present invention;
FIG. 2 is a sectional view of another embodiment of the rice cooker of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
FIG. 4 is a schematic flow chart of a first embodiment of the condensation prevention control method for an electric rice cooker of the present invention;
FIG. 5 is a schematic view showing the flow of the anti-condensation control method for an electric rice cooker according to the second embodiment of the present invention;
FIG. 6 is a schematic view showing variation curves of the first temperature value, the second temperature value and the third temperature value during the rice cooking process of the electric rice cooker of the present invention;
FIG. 7 is a schematic diagram showing the distribution of the heating power (power ratio) of the auxiliary heating body during the rice cooking process of the electric rice cooker of the present invention.
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The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "lateral", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying importance.
In order to better understand the present invention, in an embodiment of the electric rice cooker, referring to fig. 1, the electric rice cooker includes a pot body 1, an upper cover 2, a first temperature sensing probe 6, a second temperature sensing probe (not shown in the figure), and an inner pot 3 movably installed inside the pot body 1, the upper cover 2 is installed on the pot body 1 to open or close the pot body 1, a main heating body 7 is installed at the bottom of the inner pot 3, a transparent window 4 is installed on the upper cover 2, when the pot body 1 is in a closed state, the transparent window 4 faces the inner pot 3, an auxiliary heating body (not shown in the figure) for heating the transparent window 4 to prevent the transparent window 4 from generating condensation is installed on the transparent window 4, the first temperature sensing probe 6 detects the temperature in the inner pot of the electric rice cooker, the second temperature sensing probe detects the temperature on the transparent window 4, wherein the first temperature sensing probe can be installed on one side of the upper cover 2 close to the inner pot 3, and the second temperature sensing probe can be installed on the transparent window 4.
The outer surface of the cooker body 1 is provided with a decorative plate, the inner pot 3 is placed inside the cooker body 1, the joint of the bottom of the cooker body 1 and the bottom of the inner pot 3 is provided with a main heating body 7, and the inner pot 3 is generally used for containing rice and water when the electric cooker works. The upper cover 2 is covered on the pot body 1, and specifically, the upper cover 2 is installed on the outer shell of the pot body 1. Preferably, the upper lid 2 is pivotally mounted on the pot body 1. Of course, the upper cover 2 may be translationally mounted on the pot body 1. Alternatively, the upper lid 2 may not be connected to the pot body 1, and therefore, when the upper opening of the pot body 1 needs to be closed, the upper lid 2 may be covered on the pot body 1, and when the upper opening of the pot body 1 needs to be opened, the upper lid 2 may be removed from the pot body 1. For convenience, the following description is made taking as an example that the lid 2 is pivotably mounted on the pot body 1.
Optionally, the transparent window 4 is embedded in the upper cover 2, and light can be emitted into the inner pot 3 from the outside (i.e. outside the rice cooker) through the transparent window 4. The transparent window 4 can be vacuum glass or hollow glass, wherein the hollow glass is formed by bonding two or more glass sheets by using a high-strength high-airtightness composite binder; the periphery of two pieces of plate glass of vacuum glass is sealed, the gap between the two pieces of plate glass is vacuumized and the exhaust hole is sealed, the gap between the two pieces of plate glass is about 0.1 to 0.2mm, at least one of the two pieces of vacuum glass is generally low-radiation glass, so that the heat dissipated by conduction, convection and radiation of the vacuum glass is reduced to the minimum, and the working principle of the vacuum glass is the same as the heat preservation and insulation principle of a glass vacuum flask; therefore, the transparent window 4 has good heat insulation effect, and the user is prevented from being scalded due to overhigh temperature of the transparent window 4.
The auxiliary heating body can be a patch type semiconductor heating piece, a metal conducting layer and other structures, and the working principle of the semiconductor heating piece and the metal conducting layer is as follows: when the electric cooker starts cooking, in order to prevent condensation and fogging phenomena caused by the fact that the temperature of the transparent window 4 is lower than the temperature of steam in the inner pot 3, the semiconductor heating sheet or the metal conducting layer is electrified to heat the transparent window 4, when the temperature of the heating transparent window 4 is higher than the temperature of the steam in the inner pot 3, the water mist cannot be condensed on the transparent window 4, wherein the output power of the auxiliary heating body is controlled to control the temperature of the transparent window 4.
In this embodiment, through set up transparent window 4 on electric rice cooker upper cover 2, and be equipped with auxiliary heating body on transparent window 4, at electric rice cooker during operation, auxiliary heating body heats transparent window 4, the temperature that makes transparent window 4 (the second temperature value that second temperature sensing probe gathered promptly) is higher than or keep on an equal level with the vapor temperature of transparent window 4 contact (the first temperature value that first temperature sensing probe 6 gathered promptly) in interior pot 3, thereby prevent that the vapor in interior pot 3 from condensing on the transparent window of upper cover inboard, avoid on the transparent window 4 because of the condensation water smoke fuzzy, be convenient for the user observe the interior pot 3 in based on transparent window 4 in the food culinary art condition.
Further, the electric rice cooker also comprises a control chip (not shown in the figure) arranged inside the cooker body 1, the control chip is electrically connected with the auxiliary heating body to control the heating temperature of the auxiliary heating body, so that the auxiliary heating body heats the transparent window 4 at different power regulation ratios (power percentage, for example, the power of the auxiliary heating body is 10W, 1s is divided into 32 time periods, the power regulation ratio is the ratio of the number of the time periods of heating the auxiliary heating body at the power of 10W to 32 in 1 s), and the dynamic regulation of the temperature of the transparent window 4 is realized, for example, when the electric rice cooker cooks rice, in the hydrothermal heating stage, the amount of water vapor is less, and the control chip does not need to regulate the temperature of the transparent window 4 too high; if the temperature of the transparent window 4 is too high (higher than 100 ℃) in the stewing stage or the heat preservation stage of the electric cooker, the rice is easily baked to be yellow and dry, so that the temperature of the transparent window 4 is dynamically controlled through the control chip, the electric energy is saved, and the cooking effect of the electric cooker is improved. Optionally, the power range of the auxiliary heating body is 15-40W, preferably 20-30W, and the power regulation ratio is properly adjusted according to the total power to meet the temperature control requirement of the transparent window 4. Meanwhile, the control chip is also electrically connected with the main heating body, and the control chip controls the main heating body to heat so as to heat the inner pot 3.
Preferably, referring to fig. 2, the rice cooker further comprises a third temperature sensing probe (not shown in the figure) arranged at the bottom of the inner pot 3, a timer is arranged inside the control chip, and the third temperature sensing probe is electrically connected with the control chip. The third temperature sensing probe is used for detecting the heating temperature of the bottom of the inner pot 3 and the heating time of the inner pot 3 at different temperatures, so that the control chip can adjust the heating temperature and the heating time of the inner pot 3 according to requirements, for example, an electric rice cooker is used for cooking rice, the control chip can pre-store cooking control data, the cooking control data divides cooking into a water absorption stage (heating with high power, and the temperature of the bottom of the inner pot 3 is maintained in a temperature range of 50-60 ℃ so as to be beneficial for rice to absorb water), a heating stage (heating with high power, and the temperature of the bottom of the inner pot 3 is maintained in a temperature range of 110-120 ℃ until water boils), a boiling stage (heating with low power and the temperature of the bottom of the inner pot 3 is maintained to be about 130 ℃), a rice stewing stage (heating with low power and the temperature of the bottom of the inner pot 3 is maintained at about 100 ℃ for about 10 minutes), and when cooking rice is in different stages, the control chip controls the main heating body 7 at the bottom of the inner pot 3 to be heated at different temperatures and the heating time of the main body 7.
Alternatively, referring to fig. 2, the first temperature sensitive probe 6 is electrically connected to the control chip. The first temperature sensing probe 6 is used for measuring the temperature in the inner pot 3, the control chip can obtain the rice cooking amount of the electric rice cooker according to the heating power, the heating time and the temperature conversion amount in the inner pot 3 of the main heating body 7, so that the heating time and the heating temperature in each stage of cooking are further estimated, meanwhile, the temperature change in the inner pot 3 collected by the first temperature sensing probe 6 is obtained, the heating time and the heating temperature in each stage of cooking are dynamically adjusted and corrected, and the control chip adjusts the temperature of the first transparent part 41 according to the temperature in the inner pot 3 collected by the first temperature sensing probe 6 and the stage of cooking.
Further, referring to fig. 1, the transparent window 4 includes a channel 40 penetrating through the upper cover 2 and a first transparent member 41 clamped in the channel 40, and the auxiliary heating body is a metal conductive layer disposed on the surface or inside of the first transparent member 41. Preferably, the metal conductive layer is arranged on the surface of the first transparent part 41 departing from the inner pot 3, the metal conductive layer can be formed by splicing a plurality of thin conductive wires or can be a transparent conductive coating, the metal conductive layer is connected with a lead arranged around the metal conductive layer, when the electric cooker is electrified on the basis of the lead, the metal conductive layer generates heat due to the flowing of current and conducts the generated heat to the first transparent part 41, and therefore the heating of the first transparent part 41 is achieved.
Further, referring to fig. 2, the transparent window 4 further includes a second transparent member 42, and the second transparent member 42 is clamped in the channel 40 and located on a side of the first transparent member 41 facing away from the inner pan 3. When the electric cooker works, the auxiliary heating body heats the first transparent piece 41, so that the water vapor in the inner pot 3 is prevented from condensing towards the inner pot 3 side at the first transparent piece 41, and meanwhile, the second transparent piece 42 blocks the first transparent piece 41 from the outer space of the electric cooker, so that a user cannot directly contact the first transparent piece 41 in a high-temperature state, and the user is prevented from being scalded due to the fact that the first transparent piece 41 is not blocked.
Alternatively, the first transparent member 41 and the second transparent member 42 are plate-shaped members, and the first transparent member 41 and the second transparent member 42 are preferably transparent glass plates, but of course, the first transparent member 41 and the second transparent member 42 may also be acrylic plates, transparent plastic PC (Polycarbonate), PS (polystyrene plastics), PE (polyethylene) or PP (Polypropylene), and different transparent materials may be selected according to specific models of the electric cooker.
Optionally, referring to fig. 2 and 3, a slot 21 is formed in an inner wall of the channel 40, the first transparent member 41 and the second transparent member 42 are inserted into the slot 21, and a sealant is disposed between the first transparent member 41 and the slot 21 and between the second transparent member 42 and the slot 21. The first transparent member 41 is seamlessly connected with the upper cover 2, thereby preventing the water vapor in the inner pot 3 from passing through the first transparent member 41 through the gap between the first transparent member 41 and the upper cover 2; the second transparent member 42 is seamlessly connected with the upper cover 2, thereby preventing foreign matters or water outside the electric cooker from penetrating through the second transparent member 42.
Further, referring to fig. 2, the first transparent member 41, the second transparent member 42 and the channel 40 jointly enclose a window cavity, the upper cover 2 is further provided with a steam valve 5, and the window cavity is communicated with the steam valve 5. When the air in the window cavity is heated by the heating element, the air volume expands, and redundant air is discharged through the steam valve 5, so that the air in the window cavity can be prevented from being extruded with the second transparent piece 42 due to heating expansion, and the first transparent piece 41 and/or the second transparent piece 42 can be prevented from being broken.
Preferably, the side of second transparent member 42 facing first transparent member 41 is provided with an anti-fog coating. Because second transparency 42 is lower than first transparency 41 temperature, the contact of hot-air and second transparency 42 liquefies after the encounter cold to form fog and influence the user and watch easily on the second transparency, so be equipped with antifog coating in second transparency 42 towards one side of first transparency 41, can effectively avoid appearing water smoke on the second transparency 42, further improve transparent window 4's viewing effect.
The invention also provides an electric cooker condensation-proof control method, referring to fig. 2, fig. 4 and fig. 7, the electric cooker comprises a cooker body 1, an upper cover 2, a control chip, a first temperature sensing probe 6, a second temperature sensing probe and an inner pot 3, the upper cover 2 is provided with a transparent window 4, the electric cooker comprises a main heating body 7 for heating the inner pot 3 and an auxiliary heating body for heating the transparent window 4, the main heating body 7 can be arranged at the bottom of the inner pot 3, the first temperature sensing probe detects the temperature in the inner pot 3 of the electric cooker, the second temperature sensing probe detects the temperature of the transparent window 4, the first temperature sensing probe 6 can be arranged at one side of the upper cover 2 close to the inner pot 3, the second temperature sensing probe can be arranged on the transparent window 4, the auxiliary heating body, the first temperature sensing probe 6, the second temperature sensing probe and the main heating body 7 are all electrically connected with the control chip, of course, the control chip can also be arranged in the external control equipment of the electric cooker,
in a first embodiment of the anti-condensation control method of the electric cooker, the method comprises the following steps:
step S10, controlling the auxiliary heating body to heat the transparent window 4 at a preset heating power when or before the main heating body starts heating;
the heating power of the main heating body corresponds to the power regulation ratio one by one, for example, the maximum heating power corresponds to the full power regulation ratio, that is, the auxiliary heating body is heated at the full power regulation ratio (for example, the power regulation ratio is 32/32), which is equivalent to that the auxiliary heating body continuously heats at the rated power within a certain time, and the heating power of the auxiliary heating body is the rated power of the auxiliary heating body at the moment; if the auxiliary heating body is heated at a half power regulation ratio (for example, the power regulation ratio is 16/32), the auxiliary heating body is equivalent to heat at a rated power for half of the time within a certain time, and the heating power of the auxiliary heating body is half of the rated power at the moment. The heating power can be selected as the maximum heating power of the auxiliary heating body in advance, when the control chip detects that the main heating body starts to heat, the auxiliary heating body is controlled to heat the transparent window 4 with the maximum heating power so as to read and promote the temperature of the transparent window 4 quickly, and the temperature of the transparent window 4 is ensured to be higher than the temperature of the rice-water mixture in the inner pot 3.
Step S20, detecting and acquiring a first temperature value (namely, a first temperature value collected by the first temperature sensing probe 6) in the inner pot of the electric cooker and a second temperature value (namely, a second temperature value collected by the second temperature sensing probe) of the transparent window 4 body in real time;
the control chip dynamically acquires a first temperature value T1 in the inner pot 3 and a second temperature value T2 of the transparent window 4, the real-time detection acquisition is performed once every preset interval duration, and the preset interval duration can be freely set according to requirements, for example, the preset interval duration is 0.1s, 0.5s, 1s and the like, or a shorter time interval.
Step S30, comparing the first temperature value with the second temperature value and obtaining a difference value between the first temperature value and the second temperature value;
and S40, dynamically adjusting the heating power of the auxiliary heating body according to the first temperature value and the second temperature value, wherein when the relative difference value between the second temperature value and the first temperature value is less than or equal to a first positive value, the heating power of the auxiliary heating body is increased so as to enable the second temperature of the transparent window 4 to be greater than the first temperature value.
Optionally, when the relative difference between the second temperature value and the first temperature value is greater than a first positive value, the heating power of the auxiliary heating body is reduced.
The control chip dynamically adjusts the heating power of the auxiliary heating body according to the first temperature value T1 and the second temperature value T2, the relative difference value T0= T2-T1, when T0 is smaller than or equal to a first positive value (for example, the first positive value is 5), it shows that the current temperature (namely, the second temperature value) of the transparent window 4 is close to the current temperature (namely, the first temperature value) in the inner pot 3, condensation and water mist easily appear in the transparent window 4, and at the moment, the heating power of the auxiliary heating body is increased (namely, the power adjusting ratio of the auxiliary heating body is increased); when T0 is greater than first positive value, it is great to show that the current temperature of transparent window 4 differs with the current temperature in interior pot 3, and transparent window 4 temperature is higher, condensation and water smoke can not appear, for the energy saving, prevent that transparent window 4 high temperature, turn down the heating power of auxiliary heating body (adjusting the power ratio of adjusting little auxiliary heating body promptly), thereby through the heating power of dynamic adjustment auxiliary heating body, ensure that the second temperature of transparent window 4 is greater than the first temperature value in interior pot 3 always.
In this embodiment, through when the main heating body begins to heat, control auxiliary heating body is with presetting heating power heating transparent window 4, and obtain the first temperature value that first temperature sensing probe 6 gathered and the second temperature value that second temperature sensing probe gathered, then according to the heating power of first temperature value and second temperature value dynamic adjustment auxiliary heating body, thereby when the temperature is close in transparent window 4 and interior pot 3, the heating power of heightening auxiliary heating body is in order to improve the temperature of transparent window 4, so that the second temperature of transparent window 4 is greater than first temperature value, thereby avoid producing condensation and water smoke because of the temperature of transparent window 4 is less than in the interior pot 3 temperature, and then avoid condensing and fuzzy because of transparent window 4 vapor, be convenient for the user observe the culinary art condition in the interior pot 3.
Further, on the basis of the first embodiment of the anti-condensation control method for an electric cooker of the present invention, a second embodiment of the anti-condensation control method for an electric cooker is proposed, in the second embodiment, referring to fig. 2, fig. 5, fig. 6 and fig. 7, T1 in fig. 6 is a first temperature value, T2 is a second temperature value, T3 is a third temperature value, the extending length of the shaded area in the Y axis direction in fig. 7 represents the adjustment toggle range of the power adjustment ratio, the extending length of the shaded area in the X axis direction in fig. 7 identifies the duration of the power adjustment ratio in this range, the electric cooker further includes a third temperature sensing probe disposed at the bottom of the inner pot 3, the control chip is electrically connected to the third temperature sensing probe, a timer is disposed inside the control chip, of course, the timer may also be disposed in a control device outside the electric cooker, and after step S20, the method further includes:
step S50, identifying a cooking stage of the electric cooker according to the heating time counted by the timer when the autonomous heating body starts to heat, and a third temperature value T3 and/or a first temperature value T1 collected by a third temperature sensing probe, wherein the cooking stage comprises a water absorption stage, a heating stage and a boiling stage;
the rice cooker generally comprises a water absorption stage, a heating stage and a boiling stage in sequence when cooking, and each stage is described as follows:
(1) In the water absorption stage, the control chip controls the main heating body 7 to heat with larger power and maintains the temperature (namely the third temperature value) of the bottom of the inner pot 3 within the range of 60-70 ℃ (for example, the bottom temperature is maintained at about 65 ℃) for a preset water absorption time (for example, 10 minutes), and in the water absorption stage, the rice water temperature is mainly maintained within the temperature range which is beneficial to water absorption; meanwhile, the timer counts when the electric cooker starts to heat, the temperature variation of the first temperature value T1 in the inner pot 3 in the fixed time length is counted, the shorter the fixed time length is, the larger the temperature variation is, the smaller the rice quantity in the inner pot 3 of the electric cooker is, for example, the temperature variation of the rice water in the inner pot 3 in 1 minute is 20 ℃, and the corresponding rice quantity is 1 cup of rice, so that the time length of the water absorption stage can be determined according to the rice quantity, the time length of each stage of cooking (for example, the time length of the heating stage and the boiling stage) is preliminarily determined, and then the time length of each stage of cooking is further corrected according to the first temperature value and the third temperature value.
(2) When the time of the heating stage is up, the control chip controls the main heating body 7 to heat with larger power to maintain the bottom temperature of the inner pot 3 at 110-120 ℃ until the temperature of the upper cover 2 (namely the first temperature value collected by the first temperature sensing probe 6) reaches about 80 ℃, and then the rice water is judged to be about to enter the boiling state, and in the heating stage, the rice water is mainly added rapidly to enter the boiling state.
(3) When the time of the boiling stage is up, the control chip controls the main heating body 7 to heat with proper low power until the temperature of the bottom of the inner pot 3 (namely the third temperature value T3) reaches about 130 ℃, the boiling stage is completed, and the boiling stage is mainly to fully boil the rice-water mixture to fully mix the rice and water.
Step S40 includes:
s41, when the electric cooker is in a water absorption stage, controlling the auxiliary heating body to heat the transparent window 4 with first heating power;
when the electric cooker is in the water absorption stage, the main heating body 7 heats the inner pot 3 with larger power, and the first temperature value T1 in the inner pot 3 is quickly increased, so that the auxiliary heating body is controlled to heat the transparent window 4 with first heating power, the first heating power is the maximum heating power of the auxiliary heating body or is close to the maximum heating power, and the temperature (namely, the second temperature value T2) of the transparent window 4 is quickly increased, so that the second temperature value is higher than the first temperature value.
Step S42, when the electric cooker is in a heating stage, controlling the auxiliary heating body to heat the transparent window 4 with a second heating power, wherein if the relative difference value between the second temperature value and the first temperature value is less than or equal to a first positive value, the second heating power is increased;
after electric rice cooker got into the heating stage, the first temperature value in interior pot 3 can promote boiling temperature from the temperature of absorbing water rapidly, and because the second temperature value should be greater than first temperature value this moment, so control chip control auxiliary heating body is with the second heating power heating transparent window 4 that slightly is less than first heating power, and when the relative difference value of second temperature value T2 and first temperature value is less than or equal to first positive value, when the temperature is little in transparent window 4 temperature and interior pot 3 promptly, the second heating power of the auxiliary heating body of increaseing, thereby transparent window 4 and the inside rice water that carries out the solid heating of interior pot 3 of high temperature, thereby it is more even to the rice heating in the interior pot 3.
Step S43, when the electric cooker is in a boiling stage, controlling the auxiliary heating body to heat the transparent window 4 with a third heating power, wherein if the second temperature value is less than a preset boiling temperature value, the third heating power is increased; the first heating power is greater than the third heating power, the third heating power is greater than the second heating power, the electric cooker is in any cooking stage, and if the second temperature value is greater than a preset limit temperature value, the current heating power of the auxiliary heating body is reduced or set to zero.
After the electric cooker enters the boiling stage, the first temperature value in the inner pot can be stabilized at about 100 ℃, the second temperature value is greater than the first temperature value (namely the second temperature value is higher than 100 ℃), and the control chip controls the auxiliary heating body to heat the transparent window 4 with smaller third heating power, so that the temperature of the transparent window 4 is ensured to be higher than 100 ℃. Meanwhile, the control chip sets the limit temperature value (for example, 130 ℃) of the transparent window 4, the second temperature value is larger than the preset limit temperature value, the current heating power of the auxiliary heating body is reduced or set to zero, and the damage to other parts of the electric cooker caused by overhigh temperature of the transparent window 4 is prevented. Meanwhile, the transparent window 4 which generates heat when the rice water bubbles meet high temperature is immediately broken, and the effect is more obvious when the temperature of the transparent window is higher, so that the temperature of the transparent window 4 is increased as much as possible.
In this embodiment, increase the stage of cooking that electric rice cooker located, synthesize the stage of cooking, first temperature value and the three factor of second temperature value, synthesize and the heating power of dynamic adjustment auxiliary heating body, thereby according to the difference of the stage of cooking that electric rice cooker located, the heating power of adjustment auxiliary heating body, thereby under the prerequisite of guaranteeing that condensation fogging does not appear on transparent window 4, avoid auxiliary heating body heating power too big, the high temperature leads to the fact the energy extravagant, electric rice cooker part damages.
Further, on the basis of the second embodiment of the method for controlling anti-condensation of an electric cooker, the rice cooking stage of the electric cooker further comprises a rice stewing stage, after the rice stewing stage is in the boiling stage, referring to fig. 2, after step S43, the method further comprises:
and step S44, when the electric cooker is in a stewing stage, controlling the auxiliary heating body to heat the transparent window 4 with fourth heating power, wherein if the second temperature value is less than a preset stewing temperature value, the third heating power is increased, and the fourth heating power is less than or equal to the third heating power.
When the time of the stewing stage is up, the control chip controls the main heating body 7 to heat at a proper low power, the temperature of the bottom of the inner pot 3 is maintained at about 100 ℃ for a preset stewing time, for example, the preset stewing time is 10 minutes, and the stewing stage is mainly to ensure that rice is soft.
Preferably, in step S44, the control chip controls the auxiliary heating body to heat the transparent window 4 with a fourth heating power, and the control rule further includes: if the second temperature value is larger than the preset stewing temperature value, the third heating power is reduced, so that the second temperature value of the transparent window 4 is close to the preset stewing temperature, the stewing effect can be ensured, the rice is softer, and the phenomenon that the rice is dry and yellow due to the overhigh temperature of the transparent window 4 can be avoided.
Preferably, the rice cooking stage of the electric cooker also comprises a heat preservation stage, the heat preservation stage is positioned after the stewing stage,
step S44 is followed by:
and S45, when the electric cooker is in a heat preservation stage, controlling the auxiliary heating body to heat the transparent window 4 with fifth heating power, wherein if the second temperature value is greater than a preset heat preservation temperature value, the fifth heating power is reduced, and if the second temperature value is less than or equal to the preset heat preservation temperature value, the fifth heating power is increased, and the fifth heating power is less than the second heating power.
When the time of the heat preservation stage is up, the control chip controls the main heating body 7 to heat with proper low power, the temperature of the bottom of the inner pot 3 is maintained to be about 75 ℃, the rice is not easy to be over-dry and over-yellow due to over-high temperature at 75 ℃, the bacteria breeding in the cooked rice can be effectively inhibited, at the moment, the control information controls the auxiliary heating body to love the heat transparent window 4 with the fifth heating power, the preset heat preservation temperature value is about 80 ℃, and the fifth heating power is dynamically adjusted according to the average second temperature value and the preset heat preservation temperature value, so that the rice is prevented from being over-dry and over-yellow due to over-high temperature of the transparent window 4, and condensation and water mist generated on the transparent window 4 can be avoided.
It should be noted that the technical solutions of the embodiments of the present invention can be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should be considered to be absent and not to be within the protection scope of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the specification and drawings, or any other related technical fields, are all included in the scope of the present invention.
Claims (10)
1. An electric cooker anti-condensation control method is characterized in that the electric cooker comprises an inner pot, an upper cover covered on the inner pot, a first temperature sensing probe and a second temperature sensing probe, wherein a transparent window is arranged on the upper cover, the electric cooker comprises a main heating body for heating the inner pot and an auxiliary heating body for heating the transparent window, the first temperature sensing probe detects the temperature in the inner pot of the electric cooker, the second temperature sensing probe detects the temperature of the transparent window,
the anti-condensation control method of the electric cooker comprises the following steps:
when the main heating body starts to heat or before heating, the auxiliary heating body is controlled to heat the transparent window at a preset heating power;
detecting and acquiring a first temperature value in the inner pot of the electric cooker and a second temperature value of the transparent window body in real time;
comparing the first temperature value with the second temperature value and acquiring a difference value between the first temperature value and the second temperature value;
and dynamically adjusting the heating power of the auxiliary heating body according to the first temperature value and the second temperature value, wherein when the difference value obtained by subtracting the first temperature value from the second temperature value is less than or equal to a first positive value, the heating power of the auxiliary heating body is increased so as to enable the second temperature of the transparent window to be greater than the first temperature value.
2. The electric cooker anti-condensation control method as claimed in claim 1, wherein the electric cooker further comprises a third temperature sensing probe and a timer for detecting the temperature of the bottom of the inner pot,
real-time detection obtains first temperature value in the pot in the electricity rice cooker, and still include after the step of the second temperature value of transparent window body:
identifying a cooking stage of the electric cooker according to the heating duration counted by the timer when the autonomous heating body starts to heat, a third temperature value acquired by a third temperature sensing probe and/or a first temperature value acquired by a first temperature sensing probe, wherein the cooking stage comprises a water absorption stage, a heating stage and a boiling stage;
the step of dynamically adjusting the heating power of the auxiliary heating body according to the first temperature value and the second temperature value comprises the following steps:
when the electric cooker is in a water absorption stage, the auxiliary heating body is controlled to heat the transparent window with first heating power;
when the electric cooker is in a heating stage, controlling the auxiliary heating body to heat the transparent window with second heating power, wherein if the relative difference value between the second temperature value and the first temperature value is less than or equal to a first positive value, the second heating power is increased;
when the electric cooker is in a boiling stage, controlling the auxiliary heating body to heat the transparent window with third heating power, wherein if the second temperature value is less than a preset boiling temperature value, increasing the third heating power;
the first heating power is larger than the third heating power, the third heating power is larger than the second heating power, the electric cooker is in any cooking stage, and if the second temperature value is larger than a preset limit temperature value, the current heating power of the auxiliary heating body is reduced or set to zero.
3. The anti-condensation control method of the electric cooker as claimed in claim 2, wherein the rice cooking stage of the electric cooker further comprises a rice stewing stage,
when the electric cooker is in a boiling stage, the step of controlling the auxiliary heating body to heat the transparent window with a third heating power further comprises the following steps:
when the electric cooker is in a stewing stage, the auxiliary heating body is controlled to heat the transparent window at a fourth heating power, wherein if the second temperature value is less than the preset stewing temperature value, the fourth heating power is increased, and the fourth heating power is less than or equal to the third heating power.
4. The anti-condensation control method of the electric cooker as claimed in claim 3, characterized in that the cooking stage of the electric cooker further comprises a heat preservation stage,
when the electric cooker is in a stewing stage, the step of controlling the auxiliary heating body to heat the transparent window with fourth heating power further comprises the following steps:
when the electric cooker is in a heat preservation stage, the auxiliary heating body is controlled to heat the transparent window with fifth heating power, wherein if the second temperature value is larger than a preset heat preservation temperature value, the fifth heating power is reduced, if the second temperature value is smaller than or equal to the preset heat preservation temperature value, the fifth heating power is increased, and the fifth heating power is smaller than the second heating power.
5. An electric cooker, characterized in that, the electric cooker carries out the electric cooker anti-condensation control method as claimed in any one of claims 1 to 4, the electric cooker comprises a cooker body, an upper cover, a first temperature sensing probe, a second temperature sensing probe and an inner pot movably mounted inside the cooker body, the upper cover is arranged on the cooker body to open or close the cooker body, a main heating body is arranged at the bottom of the inner pot, a transparent window is arranged on the upper cover, when the cooker body is in a closed state, the transparent window faces the inner pot, an auxiliary heating body for heating the transparent window to prevent the transparent window from generating condensation is arranged on the transparent window, the first temperature sensing probe detects the temperature in the inner pot of the electric cooker, and the second temperature sensing probe detects the temperature on the transparent window.
6. The electric cooker according to claim 5, further comprising a control chip disposed inside the cooker body, wherein the auxiliary heating body and the main heating body are electrically connected to the control chip, and the control chip controls the heating temperatures of the auxiliary heating body and the main heating body.
7. The electric cooker as claimed in claim 5 or 6, wherein the transparent window comprises a channel penetrating the upper cover and a first transparent member clamped in the channel, and the auxiliary heating body is a metal conductive layer arranged on the surface or inside of the first transparent member.
8. The rice cooker of claim 7, wherein the transparent window further comprises a second transparent member, the second transparent member is clamped in the channel and is positioned on a side of the first transparent member facing away from the inner pot.
9. The rice cooker of claim 8, wherein the first transparent member, the second transparent member and the channel together define a window cavity, the upper cover further comprises a steam valve, and the window cavity is communicated with the steam valve.
10. The electric cooker according to claim 6, further comprising a third temperature sensing probe for detecting the temperature at the bottom of the inner pot, wherein a timer is disposed inside the control chip, and the first, second and third temperature sensing probes are electrically connected to the control chip.
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| CN110897511A (en) * | 2018-09-14 | 2020-03-24 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance, heating control method thereof, and computer-readable storage medium |
| CN109431233B (en) * | 2018-09-30 | 2020-11-10 | 珠海格力电器股份有限公司 | Cooking appliance and heat preservation control method and determination method thereof |
| CN109634183A (en) * | 2018-12-24 | 2019-04-16 | 珠海格力电器股份有限公司 | Electric cooking pot Condensate Controlling Equipment method, apparatus and system |
| CN110822495A (en) * | 2019-11-15 | 2020-02-21 | 广东美的厨房电器制造有限公司 | Household appliance and control method thereof |
| CN113545651A (en) * | 2020-04-24 | 2021-10-26 | 佛山市顺德区美的电热电器制造有限公司 | Control method, control device, cooking apparatus, and storage medium |
| CN113545649B (en) * | 2020-04-24 | 2022-12-06 | 佛山市顺德区美的电热电器制造有限公司 | Control method, control device, cooking apparatus, and storage medium |
| CN113545650B (en) * | 2020-04-24 | 2022-08-02 | 佛山市顺德区美的电热电器制造有限公司 | Control method, control device, cooking apparatus, and storage medium |
| CN113545680B (en) * | 2020-04-24 | 2022-12-06 | 佛山市顺德区美的电热电器制造有限公司 | Control method, control device, cooking apparatus, and storage medium |
| CN111513582B (en) * | 2020-04-29 | 2021-04-23 | 珠海格力电器股份有限公司 | Electric cooker and control method thereof |
| CN111659475B (en) * | 2020-06-12 | 2022-03-15 | 苏州苏试试验集团股份有限公司 | Automatic control system and method for preventing condensation of infrared window on test box |
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