CN108738168A - Electric cooking pot and its heating control circuit, control method - Google Patents
Electric cooking pot and its heating control circuit, control method Download PDFInfo
- Publication number
- CN108738168A CN108738168A CN201710271267.8A CN201710271267A CN108738168A CN 108738168 A CN108738168 A CN 108738168A CN 201710271267 A CN201710271267 A CN 201710271267A CN 108738168 A CN108738168 A CN 108738168A
- Authority
- CN
- China
- Prior art keywords
- switch unit
- unit
- heating units
- ptc heating
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0258—For cooking
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/035—Electrical circuits used in resistive heating apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention discloses a kind of electric cooking pot and its heating control circuit, control methods, 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 connected with each second switch unit one-to-one correspondence, and each concatenated PTC heating units and second switch unit 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, can occur not influencing the normal work of the other systems of electric cooking pot when short circuit in PTC heating units, can not only improve the reliability of electric cooking pot work, can be with cost-effective.
Description
Technical field
The present invention relates to technical field of electric appliances, more particularly to a kind of heating control circuit of electric cooking pot, a kind of electricity culinary art
Device and a kind of method for heating and controlling of electric cooking pot.
Background technology
For electric cooking apparatus (such as electric cooker), generally all has and cook and heat insulation function.In general, electric cooker is to pass through
The heater work(that the low-power in side and/or upper cover is arranged realizes heat insulation function；Pass through high-power fever arranged at the 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 are 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 automatically change with temperature, and heating speed is fast, has to heat insulation effect
It helps well, and 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, and entire electric cooker system may be made to be involved, more likely electric cooker is made to burn out, to cause
Electric cooker can not normal use.
Invention content
The application is made to the understanding of problems with and research based on inventor：
In the related technology, 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, and entire electric cooker system may be made to be involved, more likely electric cooker is made to burn out, to make
It can not normal use at 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 present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, the present invention
First purpose is to propose that a kind of heating control circuit of electric cooking pot, the circuit utilize PTC heating unit impedances with temperature
Automatically the characteristic changed can occur not influencing the normal work of the other systems of electric cooking pot when short circuit in PTC heating units, no
The reliability that electric cooking pot work can only be improved, can be with cost-effective.
Second object of the present invention is to propose a kind of heating control circuit of electric cooking pot.
Third object of the present invention is to propose a kind of method for heating and controlling of electric cooking pot.
In order to achieve the above objectives, first aspect present invention embodiment 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 after connecting with first heating unit
On the current supply circuit of the electricity cooking pot；At least one PTC heating units and at least one second switch unit, described at least one
Each PTC heating units in a PTC heating units and each second switch list at least one second switch unit
Member corresponds series connection, and each concatenated PTC heating units and second switch unit are in parallel with the first switch unit respectively；
Wherein, first heating unit and at least one PTC heating units are according to the on off state of the first switch unit
Heating work is accordingly carried out with the on off state of at least one second switch unit.
The heating control circuit of electricity cooking pot according to the ... of the embodiment of the present invention, first switch unit and the first heating unit string
It is connected in parallel to after connection on the current supply circuit of electric cooking pot, each PTC heating units and at least one at least one PTC heating units
Each second switch unit in a second switch unit corresponds series connection, and each concatenated PTC heating units and second are opened
Pass 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 list
The on off state of member and the on off state of at least one second switch unit accordingly carry out heating work.The circuit utilizes as a result,
The characteristic that the impedance of PTC heating units changes automatically with temperature can not influence electric cooking pot when short circuit occur in PTC heating units
The normal work of other systems can not only improve the reliability of electric cooking pot work, can be with cost-effective.
In addition, the heating control circuit of electricity cooking pot according to the above embodiment of the present invention can also be with following additional
Technical characteristic：
According to one embodiment of present invention, described at least one when at least one PTC heating units are one
Second switch unit is one, wherein one end of first heating unit is connected with the first end of the current supply circuit, described
The other end of first heating unit is connected with one end of the first switch unit and has first node, the first switch list
The other end of member is connected with the second end of the current supply circuit, and one end of the PTC heating units is connected with the first node,
The other end of the PTC heating units is connected with one end of the second switch unit, the other end of the second switch unit
It is connected with the second end of the current supply circuit.
According to one embodiment of present invention, when the first switch unit is in opening state and the second switch list
When member is off state, first heating unit is heated with total power, and the PTC heating units do not heat, wherein
If short circuit occurs for the PTC heating units, the electricity cooking pot keeps current working status；At the first switch unit
When opening state and the second switch unit are in opening state, first heating unit is heated with total power,
The PTC heating units do not heat, wherein if short circuit occurs for the PTC heating units, the electricity cooking pot keeps current work
Make state；When the first switch unit is off state and the second switch unit is off state, described
One heating unit does not heat, and the PTC heating units do not heat, wherein described if short circuit occurs for the PTC heating units
Electric cooking pot keeps current working status；When the first switch unit is off state and the second switch unit is in
When opening state, first heating unit is heated with micropower, and the PTC heating units are with heating with full power, wherein if
Short circuit occurs for the PTC heating units, and first heating unit is heated with total power.
According to one embodiment of present invention, first heating unit includes the bottom heat-generating disc, and the bottom
Heat-generating disc corresponds to the bottom setting of the electric cooking pot, and the PTC heating units include ptc heater, the ptc heater pair
Answer the upper cover setting of the electric cooking pot.
According to one embodiment of present invention, the first switch unit and the second switch unit are electronic cutting
It closes.
According to one embodiment of present invention, the first switch unit is relay, and the second switch unit is double
To silicon-controlled.
According to one embodiment of present invention, above-mentioned electric cooking pot further includes：Fault detection unit, the fault detect
Unit is detecting whether each PTC heating units occur short circuit；Control unit, described control unit and the fault detect list
Member is connected, and described control unit is controlled when the fault detection unit detects that short circuit occurs for any one PTC heating unit
Second switch unit shutdown corresponding to the PTC heating units of generation short circuit.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of electric cooking pot, including the present invention first
The heating control circuit of electric cooking pot described in aspect embodiment.
The electric cooking pot of the embodiment of the present invention can be heated by the heating control circuit of above-mentioned electric cooking pot in PTC
Unit occurs not influencing the normal work of the other systems of electric cooking pot when short circuit, can not only improve the reliable of electric cooking pot work
Property, it can be with cost-effective.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of method for heating and controlling of electric cooking pot,
The electricity cooking pot is opened including the first heating unit, first switch unit, at least one PTC heating units and at least one second
Unit is closed, the first switch unit is connected in parallel to the current supply circuit of the electric cooking pot after connecting with first heating unit
On, each PTC heating units at least one PTC heating units with it is every at least one second switch unit
A second switch unit corresponds series connection, and each concatenated PTC heating units and second switch unit are respectively with described first
Switch unit is in parallel, and the method for heating and controlling includes the following steps：The on off state of the first switch unit is detected, and is examined
Survey the on off state of at least one second switch unit；According to the on off state of the first switch unit and it is described at least
The on off state of one second switch unit control first heating unit and at least one PTC heating units accordingly into
Row heating work.
The method for heating and controlling of electricity cooking pot according to the ... of the embodiment of the present invention, according to the on off state of first switch unit and
The on off state of at least one second switch unit controls the first heating unit and at least one PTC heating units are accordingly added
Thermal technology makees, and so as to occur not influencing the normal work of the other systems of electric cooking pot when short circuit in PTC heating units, not only may be used
It, can be with cost-effective to improve the reliability of electric cooking pot work.
In addition, the method for heating and controlling of electricity cooking pot according to the above embodiment of the present invention can also be with following additional
Technical characteristic：
According to one embodiment of present invention, described at least one when at least one PTC heating units are one
Second switch unit is one, and one end of first heating unit is connected with the first end of the current supply circuit, described first
The other end of heating unit is connected with one end of the first switch unit and has first node, the first switch unit
The other end is connected with the second end of the current supply circuit, and one end of the PTC heating units is connected with the first node, described
The other end of PTC heating units is connected with one end of the second switch unit, the other end of the second switch unit and institute
The second end for stating current supply circuit is connected, wherein when the first switch unit is in opening state and the second switch unit
When being off state, first heating unit is heated with total power, and the PTC heating units do not heat, wherein such as
Short circuit occurs for PTC heating units described in fruit, and the electricity cooking pot keeps current working status；When the first switch unit is in
Opening state and when the second switch unit is in opening state, first heating unit is heated with total power, institute
It states PTC heating units not heat, wherein if short circuit occurs for the PTC heating units, the electricity cooking pot keeps work at present
State；When the first switch unit is off state and the second switch unit is off state, described first
Heating unit does not heat, and the PTC heating units do not heat, wherein if short circuit, the electricity occur for the PTC heating units
Cooking pot keeps current working status；It is opened when the first switch unit is off state and the second switch unit and is in
When logical state, first heating unit is heated with micropower, and the PTC heating units are with heating with full power, wherein if institute
It states PTC heating units and short circuit occurs, first heating unit is heated with total power.
According to one embodiment of present invention, the method for heating and controlling of above-mentioned electric cooking pot further includes：Detect each PTC
Whether heating unit occurs short circuit；When detecting that short circuit occurs for any one PTC heating unit, generation short circuit is controlled
Second switch unit shutdown corresponding to PTC heating units.
Description of the drawings
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein
Fig. 1 is the circuit diagram of the heating control circuit of electric cooking pot in the related technology；
Fig. 2 is the circuit diagram according to the heating control circuit of the electric cooking pot of first embodiment of the invention；
Fig. 3 is the circuit diagram according to the heating control circuit of the electric cooking pot of second embodiment of the invention；
Fig. 4 is the circuit diagram according to the heating control circuit of the electric cooking pot of third embodiment of the invention；
Fig. 5 is the circuit diagram according to the heating control circuit of the electric cooking pot of four embodiment of the invention；
Fig. 6 is the flow chart of the method for heating and controlling of electric cooking pot according to an embodiment of the invention；And
Fig. 7 is the flow chart of the method for heating and controlling of electric cooking pot in accordance with another embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the heating control circuit of electric cooking pot of proposition of the embodiment of the present invention, electric cooking pot and
The method for heating and controlling of electric cooking pot.
Fig. 2 is the circuit diagram according to the heating control circuit of the electric cooking pot of first embodiment of the invention.Such as Fig. 2 institutes
Show, 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 to after connecting with the first heating unit 10 on the current supply circuit of electric cooking pot.
PTC heating units 20 and second switch cell S 2 include at least one, and each PTC at least one PTC heating units 20 adds
Hot cell 20 is connected with each second switch cell S 2 one-to-one correspondence at least one second switch cell S 2, each concatenated
PTC heating units 20 and second switch cell S 2 are in parallel with first switch cell S 1 respectively.First heating unit 10 and at least one
A PTC heating units 20 are according to the on off state of the on off state and at least one second switch cell S 2 of first switch cell S 1
It is corresponding to carry 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 an embodiment of the present invention, the first heating unit 10 includes bottom heat-generating disc, and bottom heat-generating disc corresponds to electricity and cooks
It prepares food the bottom setting of device, PTC heating units 20 include ptc heater, and ptc heater corresponds to the upper cover setting of electric cooking pot.
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.By Fig. 2 and Fig. 3 it is found that 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 such that other systems of electric cooking pot are involved, improve electricity always
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, according to one embodiment of present invention, when first switch cell S 1 is in opening state and second opens
When pass cell S 2 is off state, the first heating unit 10 is heated with total power, and PTC heating units 20 do not heat,
In, if short circuit occurs for PTC heating units 20, electric cooking pot keeps current working status.It is opened when first switch cell S 1 is in
Logical state and when second switch cell S 2 be in opening state, the first heating unit 10 is heated with total power, and PTC heating is singly
Member 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 holding is worked as
Preceding working condition.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, and PTC heating units 20 are 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
When state, the first heating unit 10 carries out heating work with total power, and PTC heating units 20 do not work.At this point, 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 will not generate shadow even if short trouble occurs for PTC heating units 20 at this time to the working condition of the first heating unit 10
It rings, 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 raising 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 heating work, the actually heating of 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, first adds
Hot cell 10 is then heated with total power, and electric cooking pot only loses heat insulation function, will not make between firewire L and zero curve N
It there is short circuit, electric cooking pot is avoided to burn the generation of phenomenon, improves the reliability of electric cooking pot work.
It can be seen from the above, the heating control circuit of electricity cooking pot according to the ... of the embodiment of the present invention, even if PTC heating units 20
Short trouble occurs, due to that, always with the presence of load, the entire system of electric cooking pot will not occur between firewire L and zero curve N
The case where system is burnt improves the reliability of electric cooking pot work.
It is appreciated that in an embodiment of the present invention, first switch cell S 1 and second switch cell S 2 can be machinery
Switch, or electronic switch.When first switch cell S 1 and second switch cell S 2 are electronic switch, such as Fig. 4 institutes
Show, 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
Bidirectional triode thyristor.
It, 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 allow to repair 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 when short-circuit to turn off.
Specifically, as shown in figure 5, fault detection unit 30 can be resistance, to acquire 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 acquired, control unit 40 controls corresponding second switch cell S 2 and turns off at this time, can
With energy saving.
In addition, control unit 40 after turning off the second switch cell S 2 in corresponding failure channel, can also control accordingly
Prompt unit send out failure prompting, to remind user, user is allow to repair as early as possible.
In conclusion the heating control circuit of electricity cooking pot according to the ... of the embodiment of the present invention, first switch unit and first
It is connected in parallel on the current supply circuit of electric cooking pot after heating unit series connection, each PTC heating at least one PTC heating units is single
First each second switch unit one-to-one correspondence at least one second switch unit is connected, and each concatenated PTC heating is single
Member and second switch unit are in parallel with first switch unit respectively, the first heating unit and at least one PTC heating units 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.As a result,
The circuit utilizes the characteristic that changes automatically with temperature of PTC heating units impedance, can when there is short circuit in PTC heating units not shadow
The normal work for ringing the other systems of electricity cooking pot can not only improve the reliability of electric cooking pot work, can be with cost-effective.
In addition, the circuit can also be when detecting that short circuit occurs for any one PTC heating unit, the PTC for controlling generation short circuit adds
Second switch unit shutdown corresponding to hot cell, with energy saving.
The present invention 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 embodiment of the present invention can be heated by the heating control circuit of above-mentioned electric cooking pot in PTC
Unit occurs not influencing the normal work of the other systems of electric cooking pot when short circuit, can not only improve the reliable of electric cooking pot work
Property, it can be with cost-effective.
In addition, the present invention also proposes a kind of method for heating and controlling of electric cooking pot, come below in conjunction with specific embodiments
The method for heating and controlling of electric cooking pot proposed by the present invention is described.
Fig. 6 is the flow chart of the method for heating and controlling of electric cooking pot according to an embodiment of the invention.Wherein, such as Fig. 2
Shown, electric cooking pot includes the first heating unit, first switch unit, at least one PTC heating units and at least one second
Switch unit, first switch unit is connected in parallel to after connecting with the first heating unit on the current supply circuit of electric cooking pot, at least one
Each second switch unit in each PTC heating units and at least one second switch unit in PTC heating units is one by one
Corresponding series connection, each concatenated PTC heating units and second switch unit are in parallel with first switch unit respectively.As shown in fig. 6,
The method for heating and controlling of electric cooking pot includes 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
Be 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, the 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 holding is worked as
Preceding working condition.
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 heats, and PTC heating units are with heating with full power, wherein if short circuit, the first heating unit occur for PTC heating units
It is 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 point, 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, will not be had an impact to the working condition of the first heating unit, 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 raising 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, 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 always between firewire and zero curve
, thus will not there is a situation where electric cooking pot whole systems to burn, improve the reliability of electric cooking pot work.
According to one embodiment of present invention, as shown in fig. 7, the method for heating and controlling of above-mentioned electric cooking pot can also wrap
It includes：
S30, detects whether each PTC heating units occur short circuit.
S40 controls the PTC heating units of generation short circuit when detecting that short circuit occurs for any one PTC heating unit
Corresponding second switch unit shutdown.
Specifically, as shown in figure 5, current signal can be acquired 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 acquire the current signal of respective channel, controls corresponding second switch unit shutdown at this time,
It can be energy saving.
In addition, after turning off the second switch unit in corresponding failure channel, corresponding prompt unit hair can also be controlled
Prompting of being out of order allows user to repair as early as possible to remind user.
In conclusion the method for heating and controlling of electricity cooking pot according to the ... of the embodiment of the present invention, can go out in PTC heating units
The normal work for not influencing electric cooking pot other systems when existing short circuit can not only improve the reliability of electric cooking pot work, also
It can be cost-effective.In addition, this method can also control the hair when detecting that short circuit occurs for any one PTC heating unit
Second switch unit shutdown corresponding to the PTC heating units of raw short circuit, with energy saving.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is 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 spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (11)
1. a kind of heating control circuit of electricity cooking pot, which is characterized 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；
At least one PTC heating units and at least one second switch unit, each of described at least one PTC heating units
PTC heating units are connected with each second switch unit one-to-one correspondence at least one second switch unit, each to go here and there
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. the heating control circuit of electricity cooking pot as described in claim 1, which is characterized 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
State current supply circuit first end be 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. the heating control circuit of electricity cooking pot as claimed in claim 2, which is characterized 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, and the PTC heating units are with heating with full power, wherein if PTC heating units generation is short
Road, first heating unit are heated with total power.
4. the heating control circuit of electricity cooking pot as claimed in claim 2, which is characterized in that first heating unit includes
The 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 ptc heater correspond to the upper cover setting of the electric cooking pot.
5. the heating control circuit of the electric cooking pot as described in any one of claim 1-4, which is characterized in that described first opens
It is electronic switch to close unit and the second switch unit.
6. the heating control circuit of electricity cooking pot as claimed in claim 2, which is characterized in that the first switch unit be after
Electric appliance, the second switch unit are bidirectional triode thyristor.
7. the heating control circuit of electricity cooking pot as claimed in claim 5, which is characterized 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 second controlled when short circuit occurs for any one PTC heating unit corresponding to the PTC heating units of generation short circuit
Switch unit turns off.
8. a kind of electricity cooking pot, which is characterized in that include the heating control of the electric cooking pot as described in any one of claim 1-7
Circuit processed.
9. a kind of method for heating and controlling of electricity cooking pot, which is characterized in that the electricity cooking pot includes the first heating unit, first
Switch unit, at least one PTC heating units and at least one second switch unit, the first switch unit and described first
It is connected in parallel to after heating unit series connection on the current supply circuit of the electric cooking pot, each of described at least one PTC heating units
PTC heating units are connected with each second switch unit one-to-one correspondence at least one second switch unit, each to go here and there
The PTC heating units and second switch unit of connection are in parallel with the first switch unit respectively, and the method for heating and controlling includes
Following steps：
The on off state of the first switch unit is detected, and detects the on off state of at least one second switch unit；
Institute is controlled according to the on off state of the on off state of the first switch unit and at least one second switch unit
It states the first heating unit and at least one PTC heating units accordingly carries out heating work.
10. the method for heating and controlling of electricity cooking pot as claimed in claim 9, which is characterized in that when at least one PTC adds
When hot cell is one, at least one second switch unit is one, one end and the confession of first heating unit
The first end of electrical circuit is connected, and the other end of first heating unit is connected and has with one end of the first switch unit
The other end of first node, the first switch unit is connected with the second end of the current supply circuit, the PTC heating units
One end is connected with the first node, and the other end of the PTC heating units is connected with one end of the second switch unit, institute
The other end for stating second switch unit is connected with the second end of the current supply circuit, wherein
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, and the PTC heating units are with heating with full power, wherein if PTC heating units generation is short
Road, first heating unit are heated with total power.
11. the method for heating and controlling of the electric cooking pot as described in claim 9 or 10, which is characterized in that further include：
Detect whether each PTC heating units occur short circuit；
When detecting that short circuit occurs for any one PTC heating unit, corresponding to the PTC heating units that control generation short circuit
Second switch unit turns off.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710271267.8A CN108738168A (en) | 2017-04-24 | 2017-04-24 | Electric cooking pot 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 |
| JP2019557769A JP6901589B2 (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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710271267.8A CN108738168A (en) | 2017-04-24 | 2017-04-24 | Electric cooking pot and its heating control circuit, control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108738168A true CN108738168A (en) | 2018-11-02 |
Family
ID=63933996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710271267.8A Pending CN108738168A (en) | 2017-04-24 | 2017-04-24 | Electric cooking pot and its heating control circuit, control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108738168A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111109806A (en) * | 2020-01-14 | 2020-05-08 | 东莞市芯科智能科技有限公司 | Straight hair curler product and heating control circuit and control method thereof |
| CN111491400A (en) * | 2020-05-08 | 2020-08-04 | 广东美的厨房电器制造有限公司 | Heating circuit, heating device and cooking equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202135341U (en) * | 2011-05-31 | 2012-02-01 | 东莞市光为电器有限公司 | Electrothermal controller safety circuit |
| CN203122053U (en) * | 2013-01-30 | 2013-08-14 | 美的集团股份有限公司 | Electric cooker |
| CN205107337U (en) * | 2015-11-11 | 2016-03-30 | 揭阳市中科金属科技研究院有限公司 | Energy -conserving electric tea kettle of control by temperature change |
-
2017
- 2017-04-24 CN CN201710271267.8A patent/CN108738168A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202135341U (en) * | 2011-05-31 | 2012-02-01 | 东莞市光为电器有限公司 | Electrothermal controller safety circuit |
| CN203122053U (en) * | 2013-01-30 | 2013-08-14 | 美的集团股份有限公司 | Electric cooker |
| CN205107337U (en) * | 2015-11-11 | 2016-03-30 | 揭阳市中科金属科技研究院有限公司 | Energy -conserving electric tea kettle of control by temperature change |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111109806A (en) * | 2020-01-14 | 2020-05-08 | 东莞市芯科智能科技有限公司 | Straight hair curler product and heating control circuit and control method thereof |
| CN111491400A (en) * | 2020-05-08 | 2020-08-04 | 广东美的厨房电器制造有限公司 | Heating circuit, heating device and cooking equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120097148A1 (en) | Gas Burner for a Gas Hob, Gas Cooker, and Method for Operating a Gas Hob | |
| CN207280619U (en) | A kind of temperature sensing circuit, control panel and cooking appliance | |
| CN201360911Y (en) | Multifunctional electric rice cooker with multi-section temperature control function | |
| CN204576338U (en) | Power conditioning circuitry and cooking apparatus | |
| CN106610038B (en) | Cooking control method and device of induction cooker and induction cooker | |
| CN108738168A (en) | Electric cooking pot and its heating control circuit, control method | |
| CN107543217A (en) | Electric cooking pot and its control method and device | |
| CN108449814A (en) | A kind of heater | |
| CN208445766U (en) | A kind of heater | |
| CN207285922U (en) | Electric cooking pot and its heating control circuit | |
| CN201299427Y (en) | Electric cooker control circuit | |
| CN109298732B (en) | Cooking utensil and heat preservation control method thereof | |
| CN208259596U (en) | The Kick type temperature control heating device and electric cooker of electric cooker | |
| US7180038B2 (en) | Device for switching on and off several heating mechanisms of cooking equipment as well as cooking equipment with such a device | |
| WO2018196357A1 (en) | Electric cooking device and heating control circuit and control method therefor | |
| CN101884497B (en) | micro-pressure electric cooker and control method thereof | |
| CN204141641U (en) | Electricity cooking pot and controller for heat sink thereof | |
| CN203480335U (en) | PTC/NTC double-temperature-control control device | |
| CN204889590U (en) | Electricity rice cooker worker module and electric rice cooker | |
| CN102023662B (en) | A kind of control circuit of heating appliances and adopt the heating appliances of this control circuit | |
| CN208821109U (en) | A kind of multi-functional electric caldron control device | |
| CN201171595Y (en) | Inner pot temperature control system of electric cooker | |
| CN208957678U (en) | Cooking utensil | |
| CN201178966Y (en) | Control device for electric cooker | |
| CN206303668U (en) | Mechanical heater circuit and the electric cooker with mechanical heater circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181102 |