CN105992400B - Heating control device, heating control method and cooking utensil - Google Patents
Heating control device, heating control method and cooking utensil Download PDFInfo
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- CN105992400B CN105992400B CN201510094966.0A CN201510094966A CN105992400B CN 105992400 B CN105992400 B CN 105992400B CN 201510094966 A CN201510094966 A CN 201510094966A CN 105992400 B CN105992400 B CN 105992400B
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Abstract
The invention provides a heating control device, a heating control method and a cooking utensil, wherein the heating control device comprises: a DC power supply circuit; the alternating current power supply circuit is connected with the alternating current-direct current selection circuit; one end of the alternating current-direct current selection circuit is connected with the detection control circuit, and the other end of the alternating current-direct current selection circuit is connected with an object to be heated; the detection control circuit is used for detecting the resistance value and/or the current value of the object to be heated, determining whether the object to be heated is the detachable heating disc or not according to the detection result, controlling the alternating current and direct current selection circuit to be communicated with the alternating current power supply circuit after determining that the object to be heated is the detachable heating disc according to the detection result, and controlling the alternating current and direct current selection circuit to be continuously communicated with the direct current power supply circuit when the detection result is that the object to be heated is not the detachable heating disc, so that the detachable heating disc cannot be normally heated by using alternating current power provided by the alternating current power supply circuit. By the invention, the safety of using the cooking appliance by a user can be effectively ensured.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a heating control device, a heating control method and a cooking appliance.
Background
At present, because the heating back is accomplished to the thing of treating the heating to the detachable heating plate among the use cooking utensil, when can dismantle the heating plate from cooking utensil, this moment, can expose in the outside with two terminals that can dismantle the heating plate and link to each other AC/DC selection circuit or AC/DC selection circuit's movable contact electrode, because this movable contact electrode links to each other with the AC, and the voltage of AC is very high, like this, if the user is touch movable contact electrode or AC/DC selection circuit's two terminals carelessly, will electrocute, and lead to the fact the threat to user's personal safety, thereby user experience has been reduced.
Therefore, when a user accidentally touches two terminals or a movable contact electrode of the ac/dc selection circuit, how to prevent the user from touching the ac power having a high voltage is required, so as to improve the safety of the user in using the cooking appliance.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the present invention provides a heating control device, a heating control method and a cooking appliance, when the cooking appliance is communicated with an ac power supply circuit, an ac/dc selection circuit is respectively communicated with the dc power supply circuit and a detection control circuit, so that the detection control circuit detects the resistance value and/or the current value of a detachable object to be heated, determines whether the detachable object to be heated is a detachable heating plate according to the detection result, and sends an ac heating signal after determining that the detachable object to be heated is the detachable heating plate according to the detection result, controls the ac/dc selection circuit to be disconnected from the dc power supply circuit, controls the ac/dc selection circuit to continue to be communicated with the dc power supply circuit, and cannot normally heat the detachable heating plate by using the ac power provided by the ac power supply circuit, thereby preventing an object other than the detachable heating plate, such as a user's finger, from mistakenly touching two terminals of the ac/dc selection circuit, the hand-held electric hand warmer is communicated with the alternating current and direct current selection circuit by mistake, so that the alternating current and direct current selection circuit directly selects the alternating current power supply circuit to heat the fingers, and the safety of a user is threatened.
To achieve the above object, the present invention provides a heating control device comprising: the direct current power supply circuit is connected with the alternating current-direct current selection circuit; the alternating current power supply circuit is connected with the alternating current-direct current selection circuit; the alternating current and direct current selection circuit is used for selecting the direct current power supply circuit or the alternating current power supply circuit to supply power to the detachable object to be heated, and is respectively communicated with the direct current power supply circuit and the detection control circuit when the cooking appliance is communicated with the alternating current power supply circuit; the detection control circuit is connected with the alternating current and direct current selection circuit, when the alternating current and direct current selection circuit is respectively communicated with the direct current supply circuit and the detection control circuit, the detection control circuit detects the resistance value and/or the current value of the detachable object to be heated, determines whether the detachable object to be heated is a detachable heating plate according to the detection result, sends an alternating current heating signal after determining that the detachable object to be heated is the detachable heating plate according to the detection result, controls the alternating current and direct current selection circuit to be disconnected with the direct current supply circuit and communicated with the alternating current supply circuit so as to normally heat the detachable heating plate by using alternating current provided by the alternating current supply circuit, and controls the alternating current and direct current selection circuit to be continuously communicated with the direct current supply circuit when the detection result is that the detachable object to be heated is not the detachable heating plate, the alternating current provided by the alternating current supply circuit can not be used for normally heating the detachable heating plate.
The heating control device provided by the invention is characterized in that when a cooking appliance is powered on, namely is communicated with an alternating current power supply circuit, and the cooking appliance is prepared to heat a detachable object to be heated, whether the detachable object to be heated is a detachable heating plate can be accurately determined by detecting the resistance value and/or the current value of the detachable object to be heated, so that objects except the detachable heating plate, such as fingers of a user, can be prevented from mistakenly touching two terminals of an alternating current-direct current selection circuit and mistakenly communicated with the alternating current-direct current selection circuit, and the direct current-direct current selection circuit directly selects the alternating current power supply circuit to heat the fingers, thereby threatening the safety of the user, and: when the object to be heated is determined to be the detachable heating plate, the alternating current/direct current selection circuit is controlled to be disconnected from the direct current supply circuit, and the alternating current/direct current selection circuit is controlled to be communicated with the alternating current supply circuit, so that the alternating current (the voltage of the alternating current) provided by the alternating current supply circuit can ensure the normal work of the detachable heating plate, and when the object to be heated is determined not to be the detachable heating plate, the alternating current/direct current selection circuit is controlled to be continuously communicated with the direct current supply circuit but not communicated with the alternating current supply circuit, so that when the detachable heating plate is separated from the cooking appliance, because the direct current provided by the direct current supply circuit is low in voltage at the moment, even if fingers of a user (namely the object to be heated is the fingers of the user) touch two electrode terminals of the exposed alternating current/direct current selection circuit carelessly, no danger can be caused to the user, and, the user experience is improved.
In addition, the heating control device provided according to the above embodiment of the present invention has the following additional technical features:
according to an embodiment of the present invention, the detection control circuit is specifically configured to: when the detection result is that the resistance value is greater than or equal to a first resistance value and less than or equal to a second resistance value, and/or the current value is greater than or equal to a first current value and less than or equal to a second current value, determining that the detachable object to be heated is a detachable heating plate; otherwise, it is determined that the detachable object to be heated is not a detachable heating pan.
Because the resistance or the current of the detachable heating disk is in a certain range when the detachable heating disk is used for normal heating, the resistance and/or the current of an object to be heated can be detected, whether the object to be heated is the detachable heating disk or not can be judged according to the detection result, when the resistance value of the object to be heated detected by the detection control circuit is larger than or equal to a first resistance value and smaller than or equal to a second resistance value, and/or the current value is larger than or equal to the first current value and smaller than or equal to the second current value, the object to be heated is determined to be the detachable heating disk, otherwise, the object to be heated is determined not to be the detachable heating disk, so that the alternating current and direct current selection circuit can be accurately controlled to be communicated with the direct current supply circuit or the alternating current supply circuit, and the alternating current and direct current selection circuit is prevented from being mistakenly selected by the alternating current, and poses a threat to the life safety of the user.
According to an embodiment of the present invention, the ac/dc selection circuit includes: two controllable double-throw switches which are communicated with the detection control circuit and the direct current supply circuit before the detection control circuit detects the resistance value or the current value of the detachable object to be heated; and after the detection control circuit determines that the detachable object to be heated is the detachable heating plate, the two controllable double-throw switches are disconnected with the detection control circuit and the direct current power supply circuit and are respectively communicated with two poles of the alternating current power supply circuit, so that the detachable heating plate is normally heated by alternating current provided by the alternating current power supply circuit.
The AC/DC selection circuit comprises: the two controllable double-throw switches are connected with a direct current power supply circuit at the normally closed ends, and are connected with an alternating current power supply circuit at the normally open ends, particularly, before the detection control circuit detects the resistance value or the current value of the object to be heated, whether the object to be heated is a detachable heating disc is not determined, therefore, in order to ensure the safety of users, the normally closed ends of the two controllable double-throw switches are controlled to be respectively communicated with the detection control circuit and the direct current power supply circuit, because the direct current power supply circuit provides direct current and the voltage of the direct current is low, namely, the normally closed ends of the two controllable double-throw switches are connected with the direct current power supply circuit, even if the users contact two terminals of the direct current power supply circuit exposed outside, the personal safety of the users cannot be threatened, when the object to be heated is determined to be a detachable heating disc, the two controllable double-throw switches are respectively communicated with two poles of the alternating current power supply circuit, the normally open end of two controllable double throw switches is connected with the alternating current supply circuit, so that the alternating current provided by the alternating current supply circuit is used for ensuring the normal heating of the detachable heating plate, and the food in the detachable heating plate is normally heated.
According to an embodiment of the present invention, further comprising: the detachable heating plate is a detachable infrared heating plate; and one ends of the two movable contact electrodes are connected with the detachable infrared heating plate, and the other ends of the two movable contact electrodes are respectively connected with the two controllable double-throw switches.
Two terminals of two controllable double-throw switches can connect a movable contact electrode respectively to make movable contact electrode and can dismantle heating plate in close contact with, avoid two terminals of two controllable double-throw switches directly to contact with can dismantle the heating plate and lead to contact failure, like this, when two controllable double-throw switches communicate with AC supply circuit's both poles respectively, then can use the AC power that AC supply circuit provided to carry out normal heating to can dismantle the heating plate, thereby guaranteed cooking utensil's normal work.
According to an embodiment of the present invention, further comprising: state detection circuit, with detection control circuit is parallelly connected for detect whether the state of dismantling the heating plate changes, and when detecting the state of dismantling the heating plate changes, the voltage at state detection circuit both ends changes, so that the voltage at detection control circuit both ends changes and output state change cue signal, wherein, state detection circuit includes: a state detection switch, and the state detection switch contacts with the detachable heating plate.
State detection circuit and detection control circuit are parallelly connected, whether the dismouting state that can dismantle the heating plate for whether the state that the heating plate can be dismantled in the response changes, if change, if can dismantle the heating plate and be dismantled suddenly, then the voltage at state detection circuit both ends will change, and then lead to the voltage at detection control circuit both ends to change, and output state change cue signal exposes outside with two electrodes or the movable contact electrode of suggestion user cooking utensil present alternating current-direct current selection circuit, do not touch, in order to improve the safety in utilization of user to cooking utensil, of course, when dismantling the heating plate and be dismantled suddenly, the voltage at state detection circuit both ends can rise and still can reduce, the staff all can freely set for according to actual conditions, of course, state detection circuit includes: the state detection switch, this state detection switch contacts with can dismantling the heating plate, makes the state detection switch can detect out can dismantle whether the state of heating plate changes, for example: after the detachable heating plate is detached, the state detection switch can be closed or opened, if closed, the detection control circuit can be directly short-circuited, the voltage at two ends of the detection control circuit can be reduced, otherwise, if opened, the resistance of the state detection circuit can be infinite, therefore, the voltage of the detection control circuit can be increased, and of course, the state detection switch is preferably a controllable single-throw switch.
The invention also provides a heating control method, which comprises the following steps: when the cooking appliance is communicated with the alternating current power supply circuit, the alternating current/direct current selection circuit is controlled to be respectively communicated with the direct current power supply circuit and the detection control circuit, so that the detection control circuit detects the resistance value and/or the current value of the detachable object to be heated connected with the alternating current/direct current selection circuit, and whether the detachable object to be heated is the detachable heating plate is determined according to the detection result; after the detachable heating plate is determined to be the detachable object to be heated according to the detection result, the detection control circuit is controlled to send an alternating current heating signal to control the alternating current/direct current selection circuit to be disconnected with the direct current supply circuit and communicated with the alternating current supply circuit so as to normally heat the detachable heating plate by using alternating current provided by the alternating current supply circuit, and when the detection result is that the detachable object to be heated is not the detachable heating plate, the alternating current/direct current selection circuit is controlled to continue to be communicated with the direct current supply circuit so as not to normally heat the detachable heating plate by using alternating current provided by the alternating current supply circuit.
According to the heating control method provided by the invention, when a cooking appliance is powered on, namely is communicated with an alternating current power supply circuit, and the cooking appliance is prepared to heat an object to be heated, whether the object to be heated is a detachable heating plate can be accurately determined by detecting the resistance value and/or the current value of the object to be heated, so that objects except the detachable heating plate, such as fingers of a user, are prevented from mistakenly touching two terminals of an alternating current-direct current selection circuit and are mistakenly communicated with the alternating current-direct current selection circuit, and the direct current-direct current selection circuit directly selects the alternating current power supply circuit to heat the fingers, so that the safety of the user is thre: when the object to be heated is determined to be the detachable heating plate, the alternating current/direct current selection circuit is controlled to be disconnected from the direct current supply circuit, and the alternating current/direct current selection circuit is controlled to be communicated with the alternating current supply circuit, so that the alternating current (the voltage of the alternating current) provided by the alternating current supply circuit can ensure the normal work of the detachable heating plate, and when the object to be heated is determined not to be the detachable heating plate, the alternating current/direct current selection circuit is controlled to be continuously communicated with the direct current supply circuit but not communicated with the alternating current supply circuit, so that when the detachable heating plate is separated from the cooking appliance, because the direct current provided by the direct current supply circuit is low in voltage at the moment, even if fingers of a user (namely the object to be heated is the fingers of the user) touch two electrode terminals of the exposed alternating current/direct current selection circuit carelessly, no danger can be caused to the user, and, the user experience is improved.
According to an embodiment of the invention, the determining whether the detachable object to be heated is a detachable heating pan according to the detection result specifically includes: controlling the detection control circuit to determine that the detachable object to be heated is a detachable heating plate when the detection result is that the resistance value is greater than or equal to a first resistance value and less than or equal to a second resistance value and/or the current value is greater than or equal to a first current value and less than or equal to a second current value; otherwise, it is determined that the detachable object to be heated is not a detachable heating pan.
Because the resistance or the current of the detachable heating disk is in a certain range when the detachable heating disk is used for normal heating, the resistance and/or the current of an object to be heated can be detected, whether the object to be heated is the detachable heating disk or not can be judged according to the detection result, when the resistance value of the object to be heated detected by the detection control circuit is larger than or equal to a first resistance value and smaller than or equal to a second resistance value, and/or the current value is larger than or equal to the first current value and smaller than or equal to the second current value, the object to be heated is determined to be the detachable heating disk, otherwise, the object to be heated is determined not to be the detachable heating disk, so that the alternating current and direct current selection circuit can be accurately controlled to be communicated with the direct current supply circuit or the alternating current supply circuit, and the alternating current and direct current selection circuit is prevented from being mistakenly selected by the alternating current, and poses a threat to the life safety of the user.
According to an embodiment of the present invention, the ac/dc selection circuit includes: the two controllable double-throw switches are controlled to be communicated with the detection control circuit and the direct current power supply circuit before the detection control circuit detects the resistance value or the current value of the detachable object to be heated; and after the detection control circuit determines that the detachable object to be heated is the detachable heating disc, the two controllable double-throw switches are controlled to be disconnected with the detection control circuit and the direct current power supply circuit and are respectively communicated with two poles of the alternating current power supply circuit, so that the alternating current power supplied by the alternating current power supply circuit is used for normally heating the detachable heating disc.
The AC/DC selection circuit comprises: the two controllable double-throw switches are connected with a direct current power supply circuit at the normally closed ends, and are connected with an alternating current power supply circuit at the normally open ends, particularly, before the detection control circuit detects the resistance value or the current value of the object to be heated, whether the object to be heated is a detachable heating disc is not determined, therefore, in order to ensure the safety of users, the normally closed ends of the two controllable double-throw switches are controlled to be respectively communicated with the detection control circuit and the direct current power supply circuit, because the direct current power supply circuit provides direct current and the voltage of the direct current is low, namely, the normally closed ends of the two controllable double-throw switches are connected with the direct current power supply circuit, even if the users contact two terminals of the direct current power supply circuit exposed outside, the personal safety of the users cannot be threatened, when the object to be heated is determined to be a detachable heating disc, the two controllable double-throw switches are respectively communicated with two poles of the alternating current power supply circuit, the normally open end of two controllable double throw switches is connected with the alternating current supply circuit, so that the alternating current provided by the alternating current supply circuit is used for ensuring the normal heating of the detachable heating plate, and the food in the detachable heating plate is normally heated.
According to one embodiment of the invention, the removable hotplate is a removable infrared hotplate; and the heating control method further includes: and one ends of the two movable contact electrodes are connected with the detachable infrared heating plate, and the other ends of the two movable contact electrodes are respectively connected with the two controllable double-throw switches.
Two terminals of two controllable double-throw switches can connect a movable contact electrode respectively to make movable contact electrode and can dismantle heating plate in close contact with, avoid two terminals of two controllable double-throw switches directly to contact with can dismantle the heating plate and lead to contact failure, like this, when two controllable double-throw switches communicate with AC supply circuit's both poles respectively, then can use the AC power that AC supply circuit provided to carry out normal heating to can dismantle the heating plate, thereby guaranteed cooking utensil's normal work.
According to an embodiment of the present invention, further comprising: using with the state detection circuit that detection control circuit is parallelly connected detects whether the state of dismantling the heating plate changes to when detecting the state of dismantling the heating plate changes, the voltage at state detection circuit both ends changes, so that the voltage at detection control circuit both ends changes and output state change cue signal, wherein, state detection circuit includes: a state detection switch, and the state detection switch contacts with the detachable heating plate.
State detection circuit and detection control circuit are parallelly connected, whether the dismouting state that can dismantle the heating plate for whether the state that the heating plate can be dismantled in the response changes, if change, if can dismantle the heating plate and be dismantled suddenly, then the voltage at state detection circuit both ends will change, and then lead to the voltage at detection control circuit both ends to change, and output state change cue signal exposes outside with two electrodes or the movable contact electrode of suggestion user cooking utensil present alternating current-direct current selection circuit, do not touch, in order to improve the safety in utilization of user to cooking utensil, of course, when dismantling the heating plate and be dismantled suddenly, the voltage at state detection circuit both ends can rise and still can reduce, the staff all can freely set for according to actual conditions, of course, state detection circuit includes: the state detection switch, this state detection switch contacts with can dismantling the heating plate, makes the state detection switch can detect out can dismantle whether the state of heating plate changes, for example: after the detachable heating plate is detached, the state detection switch can be closed or opened, if closed, the detection control circuit can be directly short-circuited, the voltage at two ends of the detection control circuit can be reduced, otherwise, if opened, the resistance of the state detection circuit can be infinite, therefore, the voltage of the detection control circuit can be increased, and of course, the state detection switch is preferably a controllable single-throw switch.
According to the invention, a cooking appliance is also proposed, which comprises one of the above technical solutions.
According to the detachable heating plate, whether the object to be heated is the detachable heating plate is determined by detecting the resistance value and/or the current value of the object to be heated, and when the object to be heated is determined to be the detachable heating plate, the alternating current and direct current selection circuit is controlled to be communicated with the alternating current power supply circuit, so that the alternating current provided by the alternating current power supply circuit can ensure the normal work of the detachable heating plate.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a heating control device according to an embodiment of the present invention.
Wherein, the corresponding relation between the reference numbers and the part names in the figure is as follows:
the device comprises a heating control device 1, a direct current power supply circuit 11, an alternating current power supply circuit 12, an alternating current and direct current selection circuit 13, a detection control circuit 14, two movable contact electrodes 15 and a state detection circuit 16;
fig. 2 is a schematic flow chart of a heating control method according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A heating control device 1 provided according to some embodiments of the present invention is described below with reference to fig. 1.
The present invention provides a heating control device 1, including: the direct current power supply circuit 11 is connected with the alternating current-direct current selection circuit 13; the alternating current power supply circuit 12 is connected with the alternating current-direct current selection circuit 13; the alternating current/direct current selection circuit 13 is connected with the detection control circuit 14 at one end, is connected with a detachable object to be heated at the other end, is used for selecting the direct current power supply circuit 11 or the alternating current power supply circuit 12 to supply power for the detachable object to be heated, and is respectively communicated with the direct current power supply circuit 11 and the detection control circuit 14 when the cooking utensil is communicated with the alternating current power supply circuit 12; the detection control circuit 14 is connected with the alternating current/direct current selection circuit 13, when the alternating current/direct current selection circuit 13 is respectively communicated with the direct current supply circuit 11 and the detection control circuit 14, the detection control circuit 14 detects the resistance value and/or the current value of the detachable object to be heated, determines whether the detachable object to be heated is a detachable heating plate according to the detection result, sends an alternating current heating signal after determining that the detachable object to be heated is the detachable heating plate according to the detection result, controls the alternating current/direct current selection circuit 13 to be disconnected from the direct current supply circuit 11 and communicated with the alternating current supply circuit 12 so as to normally heat the detachable heating plate by using alternating current supplied by the alternating current supply circuit 12, and when the detection result indicates that the detachable object to be heated is not the detachable heating plate, and controlling the alternating current and direct current selection circuit 13 to be continuously communicated with the direct current supply circuit 11, and the alternating current provided by the alternating current supply circuit 12 cannot be used for normally heating the detachable heating plate.
According to the heating control device 1 provided by the invention, when a cooking appliance is powered on, namely is communicated with the alternating current power supply circuit 12, and the cooking appliance is prepared to heat a detachable object to be heated, whether the detachable object to be heated is a detachable heating plate can be accurately determined by detecting the resistance value and/or the current value of the detachable object to be heated, so that objects except the detachable heating plate, such as the fingers of a user, are prevented from mistakenly touching two terminals of the alternating current/direct current selection circuit 13 and are communicated with the alternating current/direct current selection circuit 13, and the alternating current/direct current selection circuit 13 directly selects the alternating current power supply circuit 12 to heat the fingers, so that the safety of the user is threatened: when the object to be heated is determined to be the detachable heating plate, the alternating current/direct current selection circuit 13 is controlled to be disconnected from the direct current supply circuit 11, and the alternating current/direct current selection circuit 13 is controlled to be communicated with the alternating current supply circuit 12, so that the alternating current (the voltage of the alternating current is higher) provided by the alternating current supply circuit 12 can ensure the normal work of the detachable heating plate, when the object to be heated is determined not to be the detachable heating plate, the alternating current/direct current selection circuit 13 is controlled to be continuously communicated with the direct current supply circuit 11 but not communicated with the alternating current supply circuit 12, therefore, when the detachable heating plate is separated from the cooking appliance, because the direct current provided by the direct current supply circuit 11 is lower at the moment, even if the fingers of a user (namely the object to be heated is the fingers of the user) touch two electrode terminals of the alternating current/direct current selection circuit 13 exposed outside carelessly, thereby effectively guaranteeing the personal safety of the user and improving the user experience.
In addition, the heating control device 1 provided according to the above embodiment of the present invention has the following additional technical features:
according to an embodiment of the present invention, the detection control circuit 14 is specifically configured to: when the detection result is that the resistance value is greater than or equal to a first resistance value and less than or equal to a second resistance value, and/or the current value is greater than or equal to a first current value and less than or equal to a second current value, determining that the detachable object to be heated is a detachable heating plate; otherwise, it is determined that the detachable object to be heated is not a detachable heating pan.
Because the resistance or the current of the detachable heating disk is in a certain range when the detachable heating disk is used for normal heating, the resistance and/or the current of an object to be heated can be detected, whether the object to be heated is the detachable heating disk or not can be judged according to the detection result, when the resistance value of the object to be heated detected by the detection control circuit 14 is larger than or equal to a first resistance value and smaller than or equal to a second resistance value, and/or the current value is larger than or equal to the first current value and smaller than or equal to the second current value, the object to be heated is determined to be the detachable heating disk, otherwise, the object to be heated is determined not to be the detachable heating disk, so that the alternating current/direct current selection circuit 13 can be accurately controlled to be communicated with the direct current supply circuit 11 or the alternating current supply circuit 12, and the phenomenon that the alternating current/direct current selection circuit 13 selects the alternating current supply circuit 12 by mistake due to, and poses a threat to the life safety of the user.
According to an embodiment of the present invention, the ac/dc selection circuit 13 includes: two controllable double-throw switches which are communicated with the detection control circuit 14 and the direct current power supply circuit 11 before the detection control circuit 14 detects the resistance value or the current value of the detachable object to be heated; and after the detection control circuit 14 determines that the detachable object to be heated is the detachable heating plate, the two controllable double-throw switches are disconnected from the detection control circuit 14 and the direct-current power supply circuit 11 and are respectively communicated with two poles of the alternating-current power supply circuit 12, so that the detachable heating plate is normally heated by the alternating current provided by the alternating-current power supply circuit 12.
The ac/dc selection circuit 13 includes: two controllable double-throw switches, the normally closed ends of which are connected with a direct current supply circuit 11, and the normally open ends of which are connected with an alternating current supply circuit 12, specifically, because before a detection control circuit 14 detects the resistance value or the current value of an object to be heated, whether the object to be heated is a detachable heating plate is not determined, in order to ensure the safety of users, the normally closed ends of the two controllable double-throw switches are controlled to be respectively communicated with the detection control circuit 14 and the direct current supply circuit 11, because the direct current is provided by the direct current supply circuit 11, and the voltage of the direct current is low, namely, the normally closed ends of the two controllable double-throw switches are connected with the direct current supply circuit 11, therefore, even if the users contact with two terminals of the direct current supply circuit 11 which is exposed, the personal safety of the users cannot be threatened, when the object to be detachable heating plate is determined, the two controllable double-throw switches are respectively communicated with two poles of the alternating current supply circuit 12, that is, the normally open ends of the two controllable double-throw switches are connected with the alternating current supply circuit 12, so that the alternating current supplied by the alternating current supply circuit 12 is used for ensuring the normal heating of the detachable heating plate, and the normal heating of the food in the detachable heating plate is realized.
According to an embodiment of the present invention, further comprising: the detachable heating plate is a detachable infrared heating plate; and one ends of the two movable contact electrodes 15 are connected with the detachable infrared heating plate, and the other ends of the two movable contact electrodes 15 are respectively connected with the two controllable double-throw switches.
Two terminals of two controllable double-throw switches can connect a movable contact electrode respectively to make movable contact electrode and can dismantle heating plate in close contact with, avoid two terminals of two controllable double-throw switches directly to contact with can dismantle the heating plate and lead to contact failure, like this, when two controllable double-throw switches communicate with the both poles of AC supply circuit 12 respectively, then can use the AC power that AC supply circuit 12 provided to normally heat can be dismantled the heating plate, thereby cooking utensil's normal work has been guaranteed.
According to an embodiment of the present invention, further comprising: a state detection circuit 16, connected in parallel to the detection control circuit 14, configured to detect whether the state of the detachable heating plate changes, and when detecting that the state of the detachable heating plate changes, the voltage at two ends of the state detection circuit 16 changes, so that the voltage at two ends of the detection control circuit 14 changes and outputs a state change prompt signal, where the state detection circuit 16 includes: a state detection switch, and the state detection switch contacts with the detachable heating plate.
The state detection circuit 16 is connected in parallel with the detection control circuit 14 and is used for sensing whether the state of the detachable heating plate changes or not, namely whether the dismounting state of the detachable heating plate changes or not, if a change occurs, such as the removable heater tray being suddenly removed, the voltage across the status detection circuit 16 changes, thereby causing the voltage at the two ends of the detection control circuit 14 to change and outputting a state change prompting signal to prompt the user that the two electrodes or the movable contact electrode of the current ac/dc selection circuit 13 of the cooking appliance are exposed without touching, so as to improve the safety of the user in using the cooking appliance, and certainly, when can dismantle the heating plate and be dismantled suddenly, the voltage at 16 both ends of state detection circuit still can rise and still can reduce, and the staff all can freely set for according to actual conditions, and of course, state detection circuit 16 includes: the state detection switch, this state detection switch contacts with can dismantling the heating plate, makes the state detection switch can detect out can dismantle whether the state of heating plate changes, for example: after the detachable heating plate is detached, the state detection switch can be closed or opened, if closed, the detection control circuit 14 can be directly short-circuited, and the voltage across the detection control circuit 14 can be reduced, otherwise, if opened, the resistance of the state detection circuit 16 can be infinite, and therefore, the voltage of the detection control circuit 14 can be increased, and of course, the state detection switch is preferably a controllable single-throw switch.
Another aspect of the present invention provides a heating control method, including: 202, when the cooking appliance is communicated with an alternating current power supply circuit, controlling the alternating current/direct current selection circuit to be communicated with the direct current power supply circuit and a detection control circuit respectively so that the detection control circuit detects the resistance value and/or the current value of a detachable object to be heated connected with the alternating current/direct current selection circuit, and determining whether the detachable object to be heated is a detachable heating plate or not according to the detection result; and 204, after the detachable object to be heated is determined to be the detachable heating disc according to the detection result, controlling the detection control circuit to send an alternating current heating signal, controlling the alternating current and direct current selection circuit to be disconnected with the direct current supply circuit and communicated with the alternating current supply circuit so as to normally heat the detachable heating disc by using alternating current provided by the alternating current supply circuit, and controlling the alternating current and direct current selection circuit to continue to be communicated with the direct current supply circuit when the detection result is that the detachable object to be heated is not the detachable heating disc, so that the alternating current provided by the alternating current supply circuit cannot be used for normally heating the detachable heating disc.
According to the heating control method provided by the invention, when a cooking appliance is powered on, namely is communicated with an alternating current power supply circuit, and the cooking appliance is prepared to heat an object to be heated, whether the object to be heated is a detachable heating plate can be accurately determined by detecting the resistance value and/or the current value of the object to be heated, so that objects except the detachable heating plate, such as fingers of a user, are prevented from mistakenly touching two terminals of an alternating current-direct current selection circuit and are mistakenly communicated with the alternating current-direct current selection circuit, and the direct current-direct current selection circuit directly selects the alternating current power supply circuit to heat the fingers, so that the safety of the user is thre: when the object to be heated is determined to be the detachable heating plate, the alternating current/direct current selection circuit is controlled to be disconnected from the direct current supply circuit, and the alternating current/direct current selection circuit is controlled to be communicated with the alternating current supply circuit, so that the alternating current (the voltage of the alternating current) provided by the alternating current supply circuit can ensure the normal work of the detachable heating plate, and when the object to be heated is determined not to be the detachable heating plate, the alternating current/direct current selection circuit is controlled to be continuously communicated with the direct current supply circuit but not communicated with the alternating current supply circuit, so that when the detachable heating plate is separated from the cooking appliance, because the direct current provided by the direct current supply circuit is low in voltage at the moment, even if fingers of a user (namely the object to be heated is the fingers of the user) touch two electrode terminals of the exposed alternating current/direct current selection circuit carelessly, no danger can be caused to the user, and, the user experience is improved.
According to an embodiment of the invention, the determining whether the detachable object to be heated is a detachable heating pan according to the detection result specifically includes: controlling the detection control circuit to determine that the detachable object to be heated is a detachable heating plate when the detection result is that the resistance value is greater than or equal to a first resistance value and less than or equal to a second resistance value and/or the current value is greater than or equal to a first current value and less than or equal to a second current value; otherwise, it is determined that the detachable object to be heated is not a detachable heating pan.
Because the resistance or the current of the detachable heating disk is in a certain range when the detachable heating disk is used for normal heating, the resistance and/or the current of an object to be heated can be detected, whether the object to be heated is the detachable heating disk or not can be judged according to the detection result, when the resistance value of the object to be heated detected by the detection control circuit is larger than or equal to a first resistance value and smaller than or equal to a second resistance value, and/or the current value is larger than or equal to the first current value and smaller than or equal to the second current value, the object to be heated is determined to be the detachable heating disk, otherwise, the object to be heated is determined not to be the detachable heating disk, so that the alternating current and direct current selection circuit can be accurately controlled to be communicated with the direct current supply circuit or the alternating current supply circuit, and the alternating current and direct current selection circuit is prevented from being mistakenly selected by the alternating current, and poses a threat to the life safety of the user.
According to an embodiment of the present invention, the ac/dc selection circuit includes: the two controllable double-throw switches are controlled to be communicated with the detection control circuit and the direct current power supply circuit before the detection control circuit detects the resistance value or the current value of the detachable object to be heated; and after the detection control circuit determines that the detachable object to be heated is the detachable heating disc, the two controllable double-throw switches are controlled to be disconnected with the detection control circuit and the direct current power supply circuit and are respectively communicated with two poles of the alternating current power supply circuit, so that the alternating current power supplied by the alternating current power supply circuit is used for normally heating the detachable heating disc.
The AC/DC selection circuit comprises: the two controllable double-throw switches are connected with a direct current power supply circuit at the normally closed ends, and are connected with an alternating current power supply circuit at the normally open ends, particularly, before the detection control circuit detects the resistance value or the current value of the object to be heated, whether the object to be heated is a detachable heating disc is not determined, therefore, in order to ensure the safety of users, the normally closed ends of the two controllable double-throw switches are controlled to be respectively communicated with the detection control circuit and the direct current power supply circuit, because the direct current power supply circuit provides direct current and the voltage of the direct current is low, namely, the normally closed ends of the two controllable double-throw switches are connected with the direct current power supply circuit, even if the users contact two terminals of the direct current power supply circuit exposed outside, the personal safety of the users cannot be threatened, when the object to be heated is determined to be a detachable heating disc, the two controllable double-throw switches are respectively communicated with two poles of the alternating current power supply circuit, the normally open end of two controllable double throw switches is connected with the alternating current supply circuit, so that the alternating current provided by the alternating current supply circuit is used for ensuring the normal heating of the detachable heating plate, and the food in the detachable heating plate is normally heated.
According to one embodiment of the invention, the removable hotplate is a removable infrared hotplate; and the heating control method further includes: and one ends of the two movable contact electrodes are connected with the detachable infrared heating plate, and the other ends of the two movable contact electrodes are respectively connected with the two controllable double-throw switches.
Two terminals of two controllable double-throw switches can connect a movable contact electrode respectively to make movable contact electrode and can dismantle heating plate in close contact with, avoid two terminals of two controllable double-throw switches directly to contact with can dismantle the heating plate and lead to contact failure, like this, when two controllable double-throw switches communicate with AC supply circuit's both poles respectively, then can use the AC power that AC supply circuit provided to carry out normal heating to can dismantle the heating plate, thereby guaranteed cooking utensil's normal work.
According to an embodiment of the present invention, further comprising: using with the state detection circuit that detection control circuit is parallelly connected detects whether the state of dismantling the heating plate changes to when detecting the state of dismantling the heating plate changes, the voltage at state detection circuit both ends changes, so that the voltage at detection control circuit both ends changes and output state change cue signal, wherein, state detection circuit includes: a state detection switch, and the state detection switch contacts with the detachable heating plate.
State detection circuit and detection control circuit are parallelly connected, whether the dismouting state that can dismantle the heating plate for whether the state that the heating plate can be dismantled in the response changes, if change, if can dismantle the heating plate and be dismantled suddenly, then the voltage at state detection circuit both ends will change, and then lead to the voltage at detection control circuit both ends to change, and output state change cue signal exposes outside with two electrodes or the movable contact electrode of suggestion user cooking utensil present alternating current-direct current selection circuit, do not touch, in order to improve the safety in utilization of user to cooking utensil, of course, when dismantling the heating plate and be dismantled suddenly, the voltage at state detection circuit both ends can rise and still can reduce, the staff all can freely set for according to actual conditions, of course, state detection circuit includes: the state detection switch, this state detection switch contacts with can dismantling the heating plate, makes the state detection switch can detect out can dismantle whether the state of heating plate changes, for example: after the detachable heating plate is detached, the state detection switch can be closed or opened, if closed, the detection control circuit can be directly short-circuited, the voltage at two ends of the detection control circuit can be reduced, otherwise, if opened, the resistance of the state detection circuit can be infinite, therefore, the voltage of the detection control circuit can be increased, and of course, the state detection switch is preferably a controllable single-throw switch.
In summary, in the present invention, when the cooking appliance is communicated with the ac power supply circuit, the ac/dc selection circuit is respectively communicated with the dc power supply circuit and the detection control circuit, so that the detection control circuit detects the resistance value and/or the current value of the detachable object to be heated, determines whether the detachable object to be heated is a detachable heating plate according to the detection result, and sends an ac heating signal after determining that the detachable object to be heated is a detachable heating plate according to the detection result, controls the ac/dc selection circuit to be disconnected from the dc power supply circuit, controls the ac/dc selection circuit to continue to be communicated with the dc power supply circuit, and cannot normally heat the detachable heating plate by using the ac power provided by the ac power supply circuit, thereby preventing an object outside the detachable heating plate, such as a finger of a user, from mistakenly touching two terminals of the ac/dc selection circuit and mistakenly, and the alternating current and direct current selection circuit directly selects the alternating current power supply circuit to heat the finger, so that the safety of the user is threatened.
In the description of the present specification, the terms "mounted," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A heating control device, comprising:
the direct current power supply circuit is connected with the alternating current-direct current selection circuit;
the alternating current power supply circuit is connected with the alternating current-direct current selection circuit;
the alternating current and direct current selection circuit is used for selecting the direct current power supply circuit or the alternating current power supply circuit to supply power to the detachable object to be heated, and is respectively communicated with the direct current power supply circuit and the detection control circuit when the cooking appliance is communicated with the alternating current power supply circuit;
the detection control circuit is connected with the alternating current and direct current selection circuit, when the alternating current and direct current selection circuit is respectively communicated with the direct current supply circuit and the detection control circuit, the detection control circuit detects the resistance value and/or the current value of the detachable object to be heated, determines whether the detachable object to be heated is a detachable heating plate according to the detection result, sends an alternating current heating signal after determining that the detachable object to be heated is the detachable heating plate according to the detection result, controls the alternating current and direct current selection circuit to be disconnected with the direct current supply circuit and communicated with the alternating current supply circuit so as to normally heat the detachable heating plate by using alternating current provided by the alternating current supply circuit, and controls the alternating current and direct current selection circuit to be continuously communicated with the direct current supply circuit when the detection result is that the detachable object to be heated is not the detachable heating plate, the alternating current provided by the alternating current power supply circuit can not be used for normally heating the detachable heating plate;
state detection circuit, with detection control circuit is parallelly connected for detect whether the state of dismantling the heating plate changes, and when detecting the state of dismantling the heating plate changes, the voltage at state detection circuit both ends changes, so that the voltage at detection control circuit both ends changes and output state change cue signal, wherein, state detection circuit includes: a state detection switch, and the state detection switch contacts with the detachable heating plate.
2. The heating control device according to claim 1,
the detection control circuit is specifically configured to: when the detection result is that the resistance value is greater than or equal to a first resistance value and less than or equal to a second resistance value, and/or the current value is greater than or equal to a first current value and less than or equal to a second current value, determining that the detachable object to be heated is a detachable heating plate; otherwise, it is determined that the detachable object to be heated is not a detachable heating pan.
3. The heating control device according to claim 1,
the alternating current-direct current selection circuit comprises: two controllable double-throw switches are arranged on the base,
the two controllable double-throw switches are communicated with the detection control circuit and the direct current power supply circuit before the detection control circuit detects the resistance value or the current value of the detachable object to be heated; and
and after the detection control circuit determines that the detachable object to be heated is the detachable heating plate, the two controllable double-throw switches are disconnected with the detection control circuit and the direct current power supply circuit and are respectively communicated with two poles of the alternating current power supply circuit so as to normally heat the detachable heating plate by using alternating current provided by the alternating current power supply circuit.
4. The heating control device according to claim 3, characterized by further comprising:
the detachable heating plate is a detachable infrared heating plate;
and one ends of the two movable contact electrodes are connected with the detachable infrared heating plate, and the other ends of the two movable contact electrodes are respectively connected with the two controllable double-throw switches.
5. A heating control method of the heating control apparatus according to any one of claims 1 to 4, characterized by comprising:
when the cooking appliance is communicated with the alternating current power supply circuit, the alternating current/direct current selection circuit is controlled to be respectively communicated with the direct current power supply circuit and the detection control circuit, so that the detection control circuit detects the resistance value and/or the current value of the detachable object to be heated connected with the alternating current/direct current selection circuit, and whether the detachable object to be heated is the detachable heating plate is determined according to the detection result;
after the detachable object to be heated is determined to be the detachable heating plate according to the detection result, the detection control circuit is controlled to send an alternating current heating signal, the alternating current and direct current selection circuit is controlled to be disconnected from the direct current power supply circuit and communicated with the alternating current power supply circuit, so that the detachable heating plate is normally heated by using alternating current provided by the alternating current power supply circuit, and when the detection result is that the detachable object to be heated is not the detachable heating plate, the alternating current and direct current selection circuit is controlled to continue to be communicated with the direct current power supply circuit, so that the detachable heating plate cannot be normally heated by using the alternating current provided by the alternating current power supply circuit;
using with the state detection circuit that detection control circuit is parallelly connected detects whether the state of dismantling the heating plate changes to when detecting the state of dismantling the heating plate changes, the voltage at state detection circuit both ends changes, so that the voltage at detection control circuit both ends changes and output state change cue signal, wherein, state detection circuit includes: a state detection switch, and the state detection switch contacts with the detachable heating plate.
6. The heating control method according to claim 5,
the determining whether the detachable object to be heated is a detachable heating plate according to the detection result specifically includes:
controlling the detection control circuit to determine that the detachable object to be heated is a detachable heating plate when the detection result is that the resistance value is greater than or equal to a first resistance value and less than or equal to a second resistance value and/or the current value is greater than or equal to a first current value and less than or equal to a second current value; otherwise, it is determined that the detachable object to be heated is not a detachable heating pan.
7. The heating control method according to claim 5,
the alternating current-direct current selection circuit comprises: two controllable double-throw switches, and
before the detection control circuit detects the resistance value or the current value of the detachable object to be heated, the two controllable double-throw switches are controlled to be communicated with the detection control circuit and the direct current power supply circuit; and
after the detection control circuit determines that the detachable object to be heated is the detachable heating plate, the two controllable double-throw switches are controlled to be disconnected with the detection control circuit and the direct current power supply circuit and are respectively communicated with two poles of the alternating current power supply circuit, so that the detachable heating plate is normally heated by alternating current provided by the alternating current power supply circuit.
8. The heating control method according to claim 7,
the detachable heating plate is a detachable infrared heating plate; and
the heating control method further includes:
and one ends of the two movable contact electrodes are connected with the detachable infrared heating plate, and the other ends of the two movable contact electrodes are respectively connected with the two controllable double-throw switches.
9. A cooking appliance, comprising: the heating control device according to any one of claims 1 to 4.
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| CN201510094966.0A CN105992400B (en) | 2015-03-03 | 2015-03-03 | Heating control device, heating control method and cooking utensil |
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| CN201510094966.0A CN105992400B (en) | 2015-03-03 | 2015-03-03 | Heating control device, heating control method and cooking utensil |
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| CN105992400B true CN105992400B (en) | 2020-11-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2398940Y (en) * | 1999-12-02 | 2000-10-04 | 潮阳市太阳光不锈制品实业有限公司 | Shock-proof security device of separating electrothermal kettle |
| JP2004186019A (en) * | 2002-12-04 | 2004-07-02 | Matsushita Electric Ind Co Ltd | Ac adapter |
| CN2667353Y (en) * | 2003-09-15 | 2004-12-29 | 孟现柱 | Electric stove produced by voltage variation principle |
| CN101070993B (en) * | 2007-05-24 | 2010-12-01 | 美的集团有限公司 | Microcomputer liquid heating device |
| CN202653903U (en) * | 2012-05-10 | 2013-01-09 | 浙江绍兴苏泊尔生活电器有限公司 | Electric heating kettle |
| CN203133633U (en) * | 2013-02-26 | 2013-08-14 | 邵明义 | Adaptable AC-DC temperature control system |
| CN203244284U (en) * | 2013-03-12 | 2013-10-23 | 冯锦钊 | Heating device with detachable and replaceable heated carriers |
| CN203647081U (en) * | 2013-11-27 | 2014-06-18 | 广东美的生活电器制造有限公司 | Cooking utensil and safety protection device for cooking utensil |
| CN104687781A (en) * | 2015-02-02 | 2015-06-10 | 湖北牧鑫智能家居股份有限公司 | Method for heating food on dinner table and food heating device |
| CN106001854A (en) * | 2016-06-30 | 2016-10-12 | 张超 | Electric shock prevention protection device of electric welding machine |
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