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CN-122004667-A - Multi-working-condition combined heating mode switching method and system for electric heating pot

CN122004667ACN 122004667 ACN122004667 ACN 122004667ACN-122004667-A

Abstract

The invention relates to the technical field of heating control of electric cookers, and discloses a multi-working-condition combined heating mode switching system of an electric cooker, which comprises a cooker body, a zoned resistance heating assembly, a thermal field acquisition assembly, a high-temperature connecting seat assembly, a switching driving assembly and a control assembly, the zoned resistance heating assembly comprises a central heating branch, an annular main heating branch and an edge compensation heating branch. According to the invention, the control component judges the current cooking working condition according to the temperature parameter of the central area of the pan bottom, the temperature parameter of the edge area of the pan bottom and the steam detection parameter in the pan, a corresponding target combined heating mode is generated, the electrifying branch is firstly reduced to the preset transition power when the mode is changed, then the connection relation and electrifying time sequence of each heating branch are controlled to switch, and when the dry heating risk working condition is judged, verification rechecking and protection control are executed through the edge compensation heating branch, so that the thermal field matching performance, the mode switching stability and the dry heating judgment accuracy are improved.

Inventors

  • Ji Benli

Assignees

  • 邹平宝申电器有限公司

Dates

Publication Date
20260512
Application Date
20260327

Claims (10)

  1. 1. The multi-working-condition combined heating mode switching system of the electric cooker is characterized by comprising a cooker body, a zoned resistance heating assembly, a thermal field acquisition assembly, a high-temperature connecting seat assembly, a switching driving assembly and a control assembly; The zoned resistance heating assembly is arranged at the bottom of the pot body and comprises a central heating branch, an annular main heating branch and an edge compensation heating branch which are respectively arranged corresponding to the central area of the pot bottom, the main heating area of the pot bottom and the edge compensation area of the pot bottom; The high-temperature connecting seat assembly is arranged on the outer side of the heating area at the bottom of the pot body and comprises a ceramic connecting base, a plurality of leading-out terminals arranged on the ceramic connecting base and a heat insulation separation part arranged between adjacent leading-out terminals, and the central heating branch, the annular main heating branch and the edge compensation heating branch are respectively connected with the corresponding leading-out terminals through high-temperature resistant transition conductive pieces; The switching driving assembly is arranged in a non-heating area at the outer side of the high-temperature connecting seat assembly and is electrically connected with each lead-out terminal, and the switching driving assembly changes the connection relation and the electrifying time sequence of the central heating branch, the annular main heating branch and the edge compensation heating branch under the control of the control assembly; The thermal field acquisition component is connected with the pot body and outputs a temperature parameter of the central area of the pot bottom, a temperature parameter of the area of the pot bottom and a steam detection parameter in the pot; The control assembly is respectively and electrically connected with the thermal field acquisition assembly and the switching driving assembly and is used for receiving a temperature parameter of a central area of the pan bottom, a temperature parameter of a temperature area of the bottom of the pan and a steam detection parameter in the pan, judging a current cooking working condition and outputting a target combined heating mode corresponding to the current cooking working condition, wherein the target combined heating mode comprises a target power distribution relation and a branch driving mode, wherein the target power distribution relation corresponds to a central heating branch, an annular main heating branch and an edge compensation heating branch, the target power distribution relation is one or more of a power distribution proportion, an electrifying duration proportion or a duty ratio corresponding to each heating branch, and the branch driving mode comprises a connection relation and electrifying time sequence of each heating branch; When the target combined heating mode is inconsistent with the currently executed combined heating mode, the control component firstly controls the input power of the heating branch circuit in the current power-on state to be reduced to the preset transition power, and then controls the switching driving component to change the connection relation and the power-on time sequence of each heating branch circuit so as to establish the target combined heating mode; when the current cooking working condition is judged to be a dry-heating risk working condition, the control component firstly controls the edge compensation heating branches to run for a preset verification period according to a preset verification power, then rechecks the dry-heating risk working condition according to the temperature parameter of the central area of the pot bottom, the temperature parameter of the edge area of the pot bottom and the occurrence state of steam in the pot, and controls each heating branch to stop supplying power when the rechecking result shows that the pot is in a liquid-shortage dry-heating state.
  2. 2. The multi-condition combined heating mode switching system of the electric cooker according to claim 1, wherein the central heating branch, the annular main heating branch and the edge compensation heating branch are respectively composed of one or more resistance heating sections, and the branch driving modes comprise a parallel high-power driving mode, a serial steady-state driving mode, an edge compensation driving mode and an alternate pulse driving mode; The parallel high-power driving mode is that two heating branches are electrified in parallel, the serial steady-state driving mode is that a central heating branch and an annular main heating branch are electrified in series, the edge compensation driving mode is that the edge compensation heating branch and the central heating branch or the annular main heating branch are electrified in a combined mode, and the alternating pulse driving mode is that the two heating branches are conducted alternately according to a preset time sequence.
  3. 3. The multi-station joint heating mode switching system of the electric food warmer of claim 1, wherein said thermal field collecting assembly comprises a center temperature sensor, an edge temperature sensor, and a steam state sensor; The central temperature sensor outputs a temperature parameter of a central area of the bottom of the pot, the edge temperature sensor outputs a temperature parameter of a bottom area of the pot, and the steam state sensor outputs a steam detection parameter in the pot; The control component determines a steam occurrence state parameter and a steam duration occurrence time parameter according to the steam detection parameter in the pot.
  4. 4. The multi-station joint heating mode switching system of the electric cooker of claim 1, wherein the control component judges the current cooking condition according to the temperature rise rate of the central area of the bottom of the cooker, the temperature rise rate of the bottom edge area of the cooker, the temperature difference between the central area of the bottom of the cooker and the bottom edge area of the cooker and the occurrence state of steam in the cooker; the steam appearance state in the pot comprises a steam-free state, a steam initial appearance state and a steam continuous appearance state; the current cooking working conditions comprise a rapid preheating working condition, a continuous boiling working condition, a steaming working condition, a stewing working condition, a heat preservation working condition and a dry heating risk working condition.
  5. 5. The multi-condition combined heating mode switching system of an electric food warmer according to claim 1, wherein the preset transition power is lower than the input power of the corresponding heating branch before switching.
  6. 6. The multi-working-condition combined heating mode switching system of an electric cooker according to claim 1, wherein the ceramic connecting base is provided with heat insulation separation parts distributed along the leading-out terminals, and the high-temperature-resistant transition conductive part is one of a high-temperature-resistant metal sheet, a high-temperature-resistant woven conductor or a high-temperature-resistant elastic conductor.
  7. 7. The multi-working condition combined heating mode switching system of the electric cooker is characterized by further comprising a branch electric parameter acquisition unit, wherein the branch electric parameter acquisition unit is used for acquiring current parameters and voltage parameters of each heating branch or acquiring resistance parameters determined by the current parameters and the voltage parameters of each heating branch, and the control component judges the conduction state, the normal load state, the open state, the short circuit state or the resistance drift state of each heating branch according to the electric parameters of each heating branch.
  8. 8. The multi-station joint heating mode switching system of the electric heating cooker of claim 4, wherein the control component judges whether the cooker is in a liquid-deficient dry heating state according to the temperature parameter of the central area of the cooker bottom, the temperature parameter of the area of the edge of the cooker bottom and the change condition of the appearance state of steam in the cooker during the operation of the edge compensation heating branch according to the preset verification power when the dry heating risk working condition is rechecked, and judges that the cooker is in the liquid-deficient dry heating state when the appearance state of steam in the cooker is continuously in a steam-free state and the temperature parameter of the central area of the cooker bottom and the temperature parameter of the area of the edge of the cooker bottom are continuously increased relative to the verification starting time in the preset verification time.
  9. 9. The multi-working-condition combined heating mode switching method of the electric cooker is characterized by comprising the following steps of: S1, collecting a temperature parameter of a central area of a pot bottom, a temperature parameter of an area of the pot bottom and a steam detection parameter in the pot; S2, determining the occurrence state of steam in the pot according to the steam detection parameter in the pot, and judging the current cooking working condition according to the temperature parameter of the central area of the pot bottom, the temperature parameter of the edge area of the pot bottom and the occurrence state of steam in the pot; S3, generating a corresponding target combined heating mode according to the current cooking working condition, wherein the target combined heating mode comprises a target power distribution relation corresponding to a central heating branch, an annular main heating branch and an edge compensation heating branch and a branch driving mode, the target power distribution relation is one or more of a power distribution proportion, an electrifying duration proportion or a duty ratio corresponding to each heating branch, and the branch driving mode comprises a connection relation and electrifying time sequence of each heating branch; S4, when the target combined heating mode is inconsistent with the current combined heating mode established and being executed in the previous control period, firstly controlling the input power of the heating branch in the current power-on state to be reduced to the preset transition power, and then controlling the switching driving assembly to change the connection relation and the power-on time sequence of the central heating branch, the annular main heating branch and the edge compensation heating branch so as to establish the target combined heating mode corresponding to the current cooking working condition; S5, continuously collecting temperature parameters of a central area of the bottom of the pan, temperature parameters of an edge area of the bottom of the pan and steam detection parameters in the pan, re-judging current cooking working conditions according to real-time collecting results and adjusting a joint heating mode which is currently being executed, when the current cooking working conditions are judged to be dry-burning risk working conditions, controlling an edge compensation heating branch to run for a preset verification period according to preset verification power, re-checking the dry-burning risk working conditions according to the temperature parameters of the central area of the bottom of the pan, the temperature parameters of the edge area of the bottom of the pan and the steam occurrence state in the pan, and controlling each heating branch to stop supplying power when the re-checking results indicate that the pan is in a liquid-shortage dry-burning state.
  10. 10. The multi-condition combined heating mode switching method of the electric cooker according to claim 9, wherein when the current cooking condition is a continuous boiling condition, the annular main heating branch is controlled to be continuously electrified, and the central heating branch is controlled to be intermittently electrified, and when the current cooking condition is a stewing condition, the central heating branch and the annular main heating branch are controlled to be serially electrified, and the edge compensation heating branch is controlled to be intermittently conducted according to the temperature difference between the central area of the bottom of the cooker and the edge area of the bottom of the cooker.

Description

Multi-working-condition combined heating mode switching method and system for electric heating pot Technical Field The invention relates to the technical field of heating control of electric cookers, in particular to a multi-station joint heating mode switching method and system of an electric cooker. Background An electric heating pot is a common electric heating device in household cooking equipment and is generally used for boiling, steaming, stewing, heat preservation and other cooking scenes. Under different cooking stages, the food material state, the liquid content and the heating requirement of the bottom of the pan body can be changed, and especially the central area, the main heating area and the edge area of the bottom of the pan are different in heating speed and heat dissipation state, so that the electric heating pan is usually required to be adjusted to the heating state according to different cooking working conditions in the actual use process so as to meet the corresponding cooking requirement. The existing electric heating pot is generally provided with a single resistance heating plate at the bottom of the pot body or a plurality of heating areas, and heating control is realized by mechanical gear switching, a power regulating circuit, a timing control program or a temperature controller start-stop mode. Although the partial scheme can realize the zonal heating, the connection relation and the electrifying mode of each heating area are mostly fixed in advance, the control basis is mainly based on single temperature parameter, simple timing logic or integral fire level switching, the joint judgment of the heated state of different areas of the pot bottom and the steam state in the pot is lacking, and the targeted adjustment of the heating mode is difficult in different cooking stages. Under the structure, the connection relation and the electrifying control mode of the existing heating branch are relatively fixed, and the heat demands of the pot body on the central area and the edge area of the pot bottom are continuously changed in the processes of rapid preheating, continuous boiling, steaming, stewing, heat preservation and the like, so that the conditions of excessively rapid local temperature rise of the pot bottom, insufficient edge heat supplement or large mode switching fluctuation easily occur in the use process, and further the situation that the distribution of a thermal field of the pot bottom is difficult to be matched with the actual cooking working condition is caused, meanwhile, the judgment of the dry heating state by the existing scheme is mostly dependent on a single temperature abnormality or a single steam change signal, and is easily influenced by short-time fluctuation, thereby influencing the cooking stability and the use safety. Disclosure of Invention The invention aims to provide a multi-working-condition combined heating mode switching method and a multi-working-condition combined heating mode switching system for an electric heating pot, which are used for solving the problems that the existing electric heating pot is difficult to accurately judge the current cooking working condition according to the heated states of different areas of the bottom of the pot and the steam states in the pot, and the combined heating modes of all heating branches are switched accordingly and smoothly, so that the hot field matching performance is insufficient, the cooking stability is poor and the dry combustion judgment accuracy is low. In order to achieve the aim of the invention, the multi-station combined heating mode switching system of the electric cooker adopts the following technical scheme that the multi-station combined heating mode switching system comprises a cooker body, a zoned resistance heating assembly, a thermal field acquisition assembly, a high-temperature connecting seat assembly, a switching driving assembly and a control assembly; The zoned resistance heating assembly is arranged at the bottom of the pot body and comprises a central heating branch, an annular main heating branch and an edge compensation heating branch which are respectively arranged corresponding to the central area of the pot bottom, the main heating area of the pot bottom and the edge compensation area of the pot bottom; The high-temperature connecting seat assembly is arranged on the outer side of the heating area at the bottom of the pot body and comprises a ceramic connecting base, a plurality of leading-out terminals arranged on the ceramic connecting base and a heat insulation separation part arranged between adjacent leading-out terminals, and the central heating branch, the annular main heating branch and the edge compensation heating branch are respectively connected with the corresponding leading-out terminals through high-temperature resistant transition conductive pieces; The switching driving assembly is arranged in a non-heating area at the outer side of the high-temperature