CN207285922U - Electric cooking pot and its heating control circuit - Google Patents

Electric cooking pot and its heating control circuit Download PDF

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Publication number
CN207285922U
CN207285922U CN201720437312.8U CN201720437312U CN207285922U CN 207285922 U CN207285922 U CN 207285922U CN 201720437312 U CN201720437312 U CN 201720437312U CN 207285922 U CN207285922 U CN 207285922U
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China
Prior art keywords
unit
switch unit
heating
cooking pot
ptc
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CN201720437312.8U
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Chinese (zh)
Inventor
钟石刚
李信合
麻百忠
吕文灿
刘金明
梅文凯
黄开平
董凯
雷志球
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Priority to CN201720437312.8U priority Critical patent/CN207285922U/en
Priority claimed from JP2019557769A external-priority patent/JP6901589B2/en
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Publication of CN207285922U publication Critical patent/CN207285922U/en
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Abstract

The utility model discloses a kind of electric cooking pot and its heating control circuit, wherein, heating control circuit includes:First heating unit;First switch unit, first switch unit are connected in parallel to after connecting with the first heating unit on the current supply circuit of electric cooking pot;At least one PTC heating units and at least one second switch unit, each PTC heating units are corresponded with each second switch unit and connected, and the PTC heating units and second switch unit each connected are in parallel with first switch unit respectively;Wherein, the first heating unit and PTC heating units accordingly carry out heating work according to the on off state of first switch unit and the on off state of second switch unit.The circuit utilizes the characteristic that the impedance of PTC heating units changes automatically with temperature, the normal work for not influencing electric cooking pot other systems during short circuit can occurs in PTC heating units, can not only improve the reliability of electric cooking pot work, can be with cost-effective.

Description

Electric cooking pot and its heating control circuit
Technical field
It the utility model is related to technical field of electric appliances, the heating control circuit and one kind electricity of more particularly to a kind of electric cooking pot Cooking pot.
Background technology
For electric cooking apparatus (such as electric cooker), generally all have and cook and heat insulation function.In general, electric cooker is to pass through The heater work(for being arranged on the low-power of side and/or upper cover realizes heat insulation function;By the high-power fever for being arranged on bottom Disk work(realizes rice-cooking function.
Wherein, upper cover heater largely uses small-power heating wire or PTC (Positive Temperature Coefficien, positive temperature coefficient, is often referred to the thermistor of positive temperature coefficient) heater.Heating wire power stability, compares peace It is complete reliable, but it is expensive.The power of ptc heater can change automatically with temperature, and firing rate is fast, has to heat insulation effect Help well, and it is cheap, but due to the limitation of production technology, it is possible that the situation of short circuit.Once PTC adds There is short trouble in hot device, may be involved whole electric cooker system, more likely burn out electric cooker, so as to cause Electric cooker can not normal use.
Utility model content
The application is that the understanding of problems with and research are made based on inventor:
In correlation technique, electric cooker is usually used circuit as shown in Figure 1 and realizes heating and heat insulation function.Using the party The heating control circuit of formula, since bottom heat-generating disc H1 and ptc heater H2 is and is connected in current supply circuit, once PTC adds There is short trouble in hot device H2, may be involved whole electric cooker system, more likely burn out electric cooker, so as to make Can not normal use into electric cooker.It follows that if the other of electric cooker can be made when short trouble occurs in ptc heater H2 System is unaffected, can not only improve the reliability of the work of electric cooker, moreover it is possible to reduce cost.
The utility model is intended to solve one of technical problem in above-mentioned technology at least to a certain extent.For this reason, this reality It is to propose a kind of heating control circuit of electric cooking pot with a new purpose, which utilizes PTC heating unit impedances The characteristic changed automatically with temperature, can not influence the normal of the other systems of electric cooking pot when short circuit occur in PTC heating units Work, can not only improve the reliability of electric cooking pot work, can be with cost-effective.
Another purpose of the utility model is to propose a kind of heating control circuit of electric cooking pot.
To reach above-mentioned purpose, on the one hand the utility model proposes a kind of heating control circuit of electric cooking pot, including: First heating unit;First switch unit, the first switch unit are connected in parallel to described after connecting with first heating unit On the current supply circuit of electric cooking pot, the current supply circuit includes firewire and zero curve;At least one PTC heating units and at least one Second switch unit, each PTC heating units and at least one second switch at least one PTC heating units Each second switch unit in unit corresponds series connection, PTC heating units and second switch the unit difference each connected It is in parallel with the first switch unit;Wherein, first heating unit and at least one PTC heating units are according to The on off state of the on off state of first switch unit and at least one second switch unit accordingly carries out heating work.
The heating control circuit of electricity cooking pot according to the present utility model, first switch unit are connected with the first heating unit Be connected in parallel to afterwards on the current supply circuit of electric cooking pot, each PTC heating units at least one PTC heating units with it is at least one Each second switch unit in second switch unit corresponds series connection, the PTC heating units and second switch each connected Unit is in parallel with first switch unit respectively, and the first heating unit and at least one PTC heating units are according to first switch unit On off state and the on off state of at least one second switch unit accordingly carry out heating work.Thus, which utilizes PTC The characteristic that heating unit impedance changes automatically with temperature, can PTC heating units occur short circuit when not influence electric cooking pot its The normal work of its system, can not only improve the reliability of electric cooking pot work, can be with cost-effective.
In addition, skill additional as follows can also be had according to the heating control circuit of the above-mentioned electric cooking pot of the utility model Art feature:
Specifically, when at least one PTC heating units are one, at least one second switch unit is one It is a, wherein, one end of first heating unit is connected with the first end of the current supply circuit, first heating unit it is another One end is connected with one end of the first switch unit and has a first node, the other end of the first switch unit with it is described The second end of current supply circuit is connected, and one end of the PTC heating units is connected with the first node, the PTC heating units The other end be connected with one end of the second switch unit, the other end of the second switch unit and the current supply circuit Second end is connected.
Further, when the first switch unit is in opening state and the second switch unit is off state When, first heating unit is heated with total power, and the PTC heating units do not heat, wherein, if the PTC adds Short circuit occurs for hot cell, and the electricity cooking pot keeps current working status;When the first switch unit be in opening state and When the second switch unit is in opening state, first heating unit is heated with total power, and the PTC heating is single Member does not heat, wherein, if short circuit occurs for the PTC heating units, the electricity cooking pot keeps current working status;When described First switch unit is off state and when the second switch unit is off state, and first heating unit is not added with Heat, the PTC heating units do not heat, wherein, if short circuit occurs for the PTC heating units, the electricity cooking pot keeps working as Preceding working status;When the first switch unit is off state and the second switch unit is in opening state, institute The first heating unit is stated to heat with micropower, the PTC heating units with heating with full power, wherein, if PTC heating is single Short circuit occurs for member, and first heating unit is heated with total power.
Specifically, first heating unit includes the bottom heat-generating disc, and the bottom heat-generating disc corresponds to the electricity The bottom of cooking pot is set, and the PTC heating units include ptc heater, and the ptc heater corresponds to the electric cooking pot Upper cover is set.
Specifically, the first switch unit and the second switch unit are electronic switch.
Further, the first switch unit is relay, and the second switch unit is bidirectional triode thyristor.
Specifically, above-mentioned electric cooking pot further includes:Fault detection unit, the fault detection unit are each to detect Whether PTC heating units occur short circuit;Control unit, described control unit are connected with the fault detection unit, the control Unit detects that any one PTC heating unit occurs to control the PTC of the generation short circuit during short circuit in the fault detection unit Second switch unit shut-off corresponding to heating unit.
To reach above-mentioned purpose, on the other hand the utility model proposes a kind of electric cooking pot, including above-mentioned electricity culinary art The heating control circuit of device.
The electric cooking pot of the utility model, by the heating control circuit of above-mentioned electric cooking pot, can heat single in PTC There is the normal work for not influencing electric cooking pot other systems during short circuit in member, can not only improve the reliable of electric cooking pot work Property, can be with cost-effective.
Brief description of the drawings
The above-mentioned and/or additional aspect of the utility model and advantage from the following description of the accompanying drawings of embodiments will Become obvious and be readily appreciated that, wherein,
Fig. 1 is the circuit diagram of the heating control circuit of electric cooking pot in correlation technique;
Fig. 2 is the circuit diagram according to the heating control circuit of the electric cooking pot of the utility model one embodiment;
Fig. 3 is the circuit diagram according to the heating control circuit of the electric cooking pot of second embodiment of the utility model;
Fig. 4 is the circuit diagram according to the heating control circuit of the electric cooking pot of the 3rd embodiment of the utility model;
Fig. 5 is the circuit diagram according to the heating control circuit of the electric cooking pot of the 4th embodiment of the utility model;
Fig. 6 is the flow chart according to the method for heating and controlling of the electric cooking pot of the utility model one embodiment;And
Fig. 7 is the flow chart according to the method for heating and controlling of the electric cooking pot of the utility model another embodiment.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.
Below with reference to the accompanying drawings come describe the utility model embodiment proposition electric cooking pot heating control circuit, electricity culinary art The method for heating and controlling of device and electric cooking pot.
Fig. 2 is the circuit diagram according to the heating control circuit of the electric cooking pot of the utility model one embodiment.Such as Fig. 2 Shown, which includes:First heating unit 10, first switch cell S 1, PTC heating units 20 and second switch cell S 2.
Wherein, first switch cell S 1 is connected in parallel on the current supply circuit of electric cooking pot after connecting with the first heating unit 10, Current supply circuit includes firewire L and zero curve N.PTC heating units 20 and second switch cell S 2 are at least one including at least one Each PTC heating units 20 in PTC heating units 20 and each second switch list at least one second switch cell S 2 First S2 corresponds series connection, the PTC heating units 20 and second switch cell S 2 each connected respectively with first switch cell S 1 It is in parallel.First heating unit 10 and at least one PTC heating units 20 are according to the on off state of first switch cell S 1 and at least The on off state of one second switch cell S 2 accordingly carries out heating work.
Further, as shown in figure 3, when at least one PTC heating units 20 are one, at least one second switch list First S2 is one, wherein, one end of the first heating unit 10 is connected with the first end (such as firewire L) of current supply circuit, and first adds The other end of hot cell 10 is connected with one end of first switch cell S 1 and has a first node Q1, first switch cell S 1 it is another One end is connected with the second end (such as zero curve N) of current supply circuit, and one end of PTC heating units 20 is connected with first node Q1, PTC The other end of heating unit 20 is connected with one end of second switch cell S 2, the other end and current supply circuit of second switch cell S 2 Second end (such as zero curve N) be connected.
In the embodiment of the utility model, the first heating unit 10 includes bottom heat-generating disc, and bottom heat-generating disc corresponds to The bottom of electric cooking pot is set, and PTC heating units 20 include ptc heater, and the upper cover that ptc heater corresponds to electric cooking pot is set Put.
Specifically, the first heating unit 10 is bottom heat-generating disc, and power is larger, is responsible for the culinary art heater of electricity cooking pot Make, first switch cell S 1 switchs for bottom heat-generating disc, is responsible for the break-make of control bottom heat-generating disc.PTC heating units 20 are PTC Heater, the upper cover heating and heat insulation work, second switch cell S 2 for being responsible for electricity cooking pot switch for ptc heater, are responsible for control The break-make of PTC heating units 20 processed.From Fig. 2 and Fig. 3, no matter which kind of situation, even if short circuit occurs for PTC heating units 20, It will ensure that firewire L and zero curve N with the presence of load, will not be involved other systems of electric cooking pot, improve electricity all the time The reliability of cooking pot work.Also, since the price of PTC is relatively low, the cost of electric cooking pot can be saved.
Further, one embodiment according to the present utility model, when first switch cell S 1 is in opening state and When two switch element S2 are off state, the first heating unit 10 is heated with total power, and PTC heating units 20 are not added with Heat, wherein, if short circuit occurs for PTC heating units 20, electric cooking pot keeps current working status.At first switch cell S 1 When opening state and second switch cell S 2 are in opening state, the first heating unit 10 is heated with total power, and PTC adds Hot cell 20 does not heat, wherein, if short circuit occurs for PTC heating units 20, electric cooking pot keeps current working status.
When first switch cell S 1 is off state and second switch cell S 2 is off state, the first heating is single Member 10 does not heat, and PTC heating units 20 do not heat, wherein, if short circuit occurs for PTC heating units 20, electric cooking pot keeps working as Preceding working status.When first switch cell S 1 is off state and second switch cell S 2 is in opening state, first adds Hot cell 10 is heated with micropower, PTC heating units 20 with heating with full power, wherein, if PTC heating units 20 occur it is short Road, the first heating unit 10 are heated with total power.
Specifically, as shown in figure 3, when first switch cell S 1 is in opening state and second switch cell S 2 is off During state, the first heating unit 10 carries out heating work with total power, and PTC heating units 20 do not work.At this time, if PTC adds Short circuit occurs for hot cell 20, and electric cooking pot keeps current working status.
When first switch cell S 1 is in opening state and second switch cell S 2 is in opening state, due to PTC plus The voltage at 20 both ends of hot cell is identical, so PTC heating units 20 do not work, the first heating unit 10 is heated with total power Work, even if short trouble occurs for PTC heating units 20 at this time, will not produce shadow to the working status of the first heating unit 10 Ring, electric cooking pot keeps current working status.
When first switch cell S 1 is off state and second switch cell S 2 is off state, the first heating is single 10 and PTC of member heating units 20 do not work, if short circuit occurs for PTC heating units 20 at this time, electric cooking pot keeps current work Make state.
When first switch cell S 1 is off state and second switch cell S 2 is in opening state, the first heating is single The series connection of 10 and PTC of member heating units 20 carries out heating work.Since the impedance of PTC heating units 20 can be in the rise of temperature Step evolution increases, so that most of drop of pressure is on PTC heating units 20, the partial pressure very little of the first heating unit 10. Although the first heating unit 10 and the series connection of PTC heating units 20 carry out the heating of heating work, actually the first heating unit 10 Power is very small, and electric cooking pot carries out heat insulation work.At this time.If short trouble occurs for PTC heating units 20, then first adds Hot cell 10 is then heated with total power, and electric cooking pot simply loses heat insulation function, will not make between firewire L and zero curve N It there is short circuit, avoids electric cooking pot from burning the generation of phenomenon, improves the reliability of electric cooking pot work.
It can be seen from the above, according to the heating control circuit of the electric cooking pot of the utility model embodiment, even if PTC heating is single Short trouble occurs for member 20, due to that, all the time with the presence of load, the whole of electric cooking pot will not occur between firewire L and zero curve N There is situation about burning in a system, and improves the reliability of electric cooking pot work.
It is appreciated that in the embodiment of the utility model, first switch cell S 1 and second switch cell S 2 can be Mechanical switch, or electronic switch.When first switch cell S 1 and second switch cell S 2 are electronic switch, such as scheme Shown in 4, by taking PTC heating units 20 are one as an example, first switch cell S 1 can be relay, and second switch cell S 2 can be with For bidirectional triode thyristor.
, can be to PTC heating units 20 when first switch cell S 1 and second switch cell S 2 are using electronic switch Short trouble is identified, and to remind user, user is carried out maintenance as early as possible.Specifically, as shown in figure 5, The heating control circuit of above-mentioned electric cooking pot can also include fault detection unit 30 and control unit 40.
Wherein, fault detection unit 30 is detecting whether each PTC heating units 20 occur short circuit.Control unit 40 with Fault detection unit 30 is connected, and control unit 40 detects that any one PTC heating unit 20 occurs in fault detection unit 30 The second switch cell S 2 corresponding to the PTC heating units 20 of generation short circuit is controlled to turn off when short-circuit.
Specifically, as shown in figure 5, fault detection unit 30 can be resistance, to gather current signal, control unit 40 Second switch cell S 2 is controlled according to current signal.Wherein, when PTC heating units 20 work normally, fault detection unit 30 Normal current signal can be collected.And when short trouble occurs in any one PTC heating unit 20, fault detection unit 30 The current signal of respective channel is not collected, control unit 40 controls corresponding second switch cell S 2 to turn off at this time, can To save the energy.
In addition, control unit 40 after the second switch cell S 2 of corresponding failure passage is turned off, can also control accordingly Prompt unit send failure prompting, to remind user, user is carried out maintenance as early as possible.
In conclusion according to the heating control circuit of the electric cooking pot of the utility model embodiment, first switch unit with It is connected in parallel to after the series connection of first heating unit on the current supply circuit of electric cooking pot, each PTC at least one PTC heating units adds Hot cell is corresponded with each second switch unit at least one second switch unit and connected, and the PTC each to connect adds Hot cell and second switch unit are in parallel with first switch unit respectively, the first heating unit and at least one PTC heating units Heating work is accordingly carried out according to the on off state of the on off state of first switch unit and at least one second switch unit.By This, which utilizes the characteristic that the impedance of PTC heating units changes automatically with temperature, can be when short circuit occur in PTC heating units The normal work of the other systems of electric cooking pot is not influenced, can not only be improved the reliability of electric cooking pot work, can also be saved Cost.In addition, the circuit can also control generation short circuit when detecting that short circuit occurs for any one PTC heating unit Second switch unit shut-off corresponding to PTC heating units, to save the energy.
The utility model also proposes a kind of electric cooking pot, includes the heating control circuit of above-mentioned electric cooking pot.
The electric cooking pot of the utility model embodiment, can be in PTC by the heating control circuit of above-mentioned electric cooking pot There is the normal work for not influencing electric cooking pot other systems during short circuit in heating unit, can not only improve electric cooking pot work Reliability, can be with cost-effective.
In addition, the utility model also proposes a kind of method for heating and controlling of electric cooking pot, implement below in conjunction with specific Example come describe the utility model proposes electric cooking pot method for heating and controlling.
Fig. 6 is the flow chart according to the method for heating and controlling of the electric cooking pot of the utility model one embodiment.Wherein, such as Shown in Fig. 2, electric cooking pot includes the first heating unit, first switch unit, at least one PTC heating units and at least one the Two switch elements, first switch unit are connected in parallel to after connecting with the first heating unit on the current supply circuit of electric cooking pot, and at least one Each PTC heating units in a PTC heating units and each second switch unit one at least one second switch unit One corresponds to series connection, and the PTC heating units and second switch unit each connected are in parallel with first switch unit respectively.Such as Fig. 6 institutes Show, the method for heating and controlling of electric cooking pot comprises the following steps:
S10, detects the on off state of first switch unit, and detects the on off state of at least one second switch unit.
S20, according to the on off state of the on off state of first switch unit and at least one second switch unit control the One heating unit and at least one PTC heating units accordingly carry out heating work.
Further, as shown in figure 3, when at least one PTC heating units are one, at least one second switch unit For one, one end of the first heating unit is connected with the first end (such as firewire) of current supply circuit, the first heating unit it is another End is connected with one end of first switch unit and has first node, an other end of first switch unit and the second of current supply circuit (such as zero curve) is held to be connected, one end of PTC heating units is connected with first node, and the other end of PTC heating units is opened with second The one end for closing unit is connected, and the other end of second switch unit is connected with the second end (such as zero curve) of current supply circuit.
Wherein, when first switch unit is in opening state and second switch unit is off state, the first heating Unit is heated with total power, and PTC heating units do not heat, wherein, if short circuit, electric cooking pot occur for PTC heating units Keep current working status.
When first switch unit is in opening state and second switch unit is in opening state, the first heating unit with Total power is heated, and PTC heating units do not heat, wherein, if short circuit occurs for PTC heating units, electric cooking pot keeps working as Preceding working status.
When first switch unit is off state and second switch unit is off state, the first heating unit is not Heating, PTC heating units do not heat, wherein, if short circuit occurs for PTC heating units, electric cooking pot keeps current working status.
When first switch unit is off state and second switch unit is in opening state, the first heating unit with Micropower heat, PTC heating units with heating with full power, wherein, if PTC heating units occur short circuit, the first heating unit Heated with total power.
Specifically, when first switch unit is in opening state and second switch unit is off state, first adds Hot cell carries out heating work with total power, and PTC heating units do not work.At this time, if short circuit, electricity occur for PTC heating units Cooking pot keeps current working status.
When first switch unit is in opening state and second switch unit is in opening state, since PTC heats list The voltage at first both ends is identical, so PTC heating units do not work, the first heating unit carries out heating work with total power, even if Short trouble occurs for PTC heating units at this time, and the working status of the first heating unit will not be had an impact, and electric cooking pot is protected Hold current working status.
When first switch unit is off state and second switch unit is off state, the first heating unit and PTC heating units do not work, if short circuit occurs for PTC heating units at this time, electric cooking pot keeps current working status.
When first switch unit is off state and second switch unit is in opening state, the first heating unit and The series connection of PTC heating units carries out heating work.Since the impedance of PTC heating units can be in the increasing of step evolution with the rise of temperature Height, so that most of drop of pressure is on PTC heating units, the partial pressure very little of the first heating unit, although the first heating is single Member and PTC heating units series connection carry out heating work, the heating power of actually the first heating unit is very small, electric cooking pot into Row heat insulation work.At this time.If short trouble occurs for PTC heating units, then the first heating unit is then added with total power Heat, will not make be in the presence of short circuit between firewire and zero curve, avoid electric cooking pot from burning the generation of phenomenon, improve electric culinary art The reliability of device work.
It can be seen from the above, even if short trouble occurs for PTC heating units, due to having load to deposit all the time between firewire and zero curve , therefore will not be burnt there is a situation where electric cooking pot whole system, improve the reliability of electric cooking pot work.
One embodiment according to the present utility model, as shown in fig. 7, the method for heating and controlling of above-mentioned electric cooking pot may be used also With including:
S30, detects whether each PTC heating units occur short circuit.
S40, when detecting that short circuit occurs for any one PTC heating unit, controls the PTC heating units of generation short circuit Corresponding second switch unit shut-off.
Specifically, as shown in figure 5, current signal can be gathered by fault detection unit, to detect each PTC heating units Short circuit whether occurs, the break-make of second switch unit is then controlled according to current signal.Wherein, when the normal work of PTC heating units When making, fault detection unit can collect normal current signal.And when short trouble occurs in any one PTC heating unit When, fault detection unit does not collect the current signal of respective channel, controls corresponding second switch unit to turn off at this time, The energy can be saved.
In addition, after the second switch unit of corresponding failure passage is turned off, corresponding prompt unit can also be controlled to send out It is out of order prompting, to remind user, user is carried out maintenance as early as possible.
In conclusion according to the method for heating and controlling of the electric cooking pot of the utility model embodiment, can be heated in PTC single There is the normal work for not influencing electric cooking pot other systems during short circuit in member, can not only improve the reliable of electric cooking pot work Property, can be with cost-effective.In addition, this method can also be when detecting that short circuit occurs for any one PTC heating unit, control Second switch unit shut-off corresponding to the PTC heating units of generation short circuit, to save the energy.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on orientation shown in the drawings Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than instruction or imply signified device or Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limit to the utility model System.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the utility model, " multiple " are meant that at least two, such as two It is a, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally;Can be Mechanically connect or be electrically connected;It can be directly connected, can also be indirectly connected by intermediary, can be two The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this area For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (8)

  1. A kind of 1. heating control circuit of electricity cooking pot, it is characterised in that including:
    First heating unit;
    First switch unit, the first switch unit are connected in parallel to the electric cooking pot after connecting with first heating unit On current supply circuit, the current supply circuit includes firewire and zero curve;
    At least one PTC heating units and at least one second switch unit, it is each at least one PTC heating units PTC heating units are corresponded with each second switch unit at least one second switch unit and connected, each string The PTC heating units and second switch unit of connection are in parallel with the first switch unit respectively;
    Wherein, first heating unit and at least one PTC heating units are according to the switch of the first switch unit The on off state of state and at least one second switch unit accordingly carries out heating work.
  2. 2. the heating control circuit of electricity cooking pot as claimed in claim 1, it is characterised in that when at least one PTC adds When hot cell is one, at least one second switch unit is one, wherein, one end of first heating unit and institute The first end for stating current supply circuit is connected, the other end of first heating unit be connected with one end of the first switch unit and With first node, the other end of the first switch unit is connected with the second end of the current supply circuit, and the PTC heating is single One end of member is connected with the first node, one end phase of the other end of the PTC heating units and the second switch unit Even, the other end of the second switch unit is connected with the second end of the current supply circuit.
  3. 3. the heating control circuit of electricity cooking pot as claimed in claim 2, it is characterised in that
    When the first switch unit is in opening state and the second switch unit is off state, described first adds Hot cell is heated with total power, and the PTC heating units do not heat, wherein, if PTC heating units generation is short Road, the electricity cooking pot keep current working status;
    When the first switch unit is in opening state and the second switch unit is in opening state, described first adds Hot cell is heated with total power, and the PTC heating units do not heat, wherein, if PTC heating units generation is short Road, the electricity cooking pot keep current working status;
    When the first switch unit is off state and the second switch unit is off state, described first adds Hot cell does not heat, and the PTC heating units do not heat, wherein, if short circuit occurs for the PTC heating units, the electricity is cooked Device of preparing food keeps current working status;
    When the first switch unit is off state and the second switch unit is in opening state, described first adds Hot cell is heated with micropower, the PTC heating units with heating with full power, wherein, if the PTC heating units occur it is short Road, first heating unit are heated with total power.
  4. 4. the heating control circuit of electricity cooking pot as claimed in claim 2, it is characterised in that first heating unit includes Bottom heat-generating disc, and the bottom heat-generating disc corresponds to the bottom setting of the electric cooking pot, the PTC heating units include PTC Heater, the upper cover that the ptc heater corresponds to the electric cooking pot are set.
  5. 5. the heating control circuit of the electric cooking pot as any one of claim 1-4, it is characterised in that described first opens It is electronic switch to close unit and the second switch unit.
  6. 6. the heating control circuit of electricity cooking pot as claimed in claim 2, it is characterised in that the first switch unit be after Electric appliance, the second switch unit are bidirectional triode thyristor.
  7. 7. the heating control circuit of electricity cooking pot as claimed in claim 5, it is characterised in that further include:
    Fault detection unit, the fault detection unit is detecting whether each PTC heating units occur short circuit;
    Control unit, described control unit are connected with the fault detection unit, and described control unit is in the fault detect list Member detects that any one PTC heating unit occurs to control second corresponding to the PTC heating units of the generation short circuit during short circuit Switch element turns off.
  8. 8. a kind of electricity cooking pot, it is characterised in that include the heating control of the electric cooking pot as any one of claim 1-7 Circuit processed.
CN201720437312.8U 2017-04-24 2017-04-24 Electric cooking pot and its heating control circuit Active CN207285922U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720437312.8U CN207285922U (en) 2017-04-24 2017-04-24 Electric cooking pot and its heating control circuit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201720437312.8U CN207285922U (en) 2017-04-24 2017-04-24 Electric cooking pot and its heating control circuit
JP2019557769A JP6901589B2 (en) 2017-04-24 2017-11-21 Electric cooker and its heating control circuit, control method
KR1020197034148A KR102272895B1 (en) 2017-04-24 2017-11-21 Electric cooker and its heating control circuit,Control method
PCT/CN2017/112148 WO2018196357A1 (en) 2017-04-24 2017-11-21 Electric cooking device and heating control circuit and control method therefor

Publications (1)

Publication Number Publication Date
CN207285922U true CN207285922U (en) 2018-05-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720437312.8U Active CN207285922U (en) 2017-04-24 2017-04-24 Electric cooking pot and its heating control circuit

Country Status (1)

Country Link
CN (1) CN207285922U (en)

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