CN107997571A - It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch - Google Patents
It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch Download PDFInfo
- Publication number
- CN107997571A CN107997571A CN201610934246.5A CN201610934246A CN107997571A CN 107997571 A CN107997571 A CN 107997571A CN 201610934246 A CN201610934246 A CN 201610934246A CN 107997571 A CN107997571 A CN 107997571A
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- China
- Prior art keywords
- pressure switch
- protection
- switch
- pressure
- hot tray
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/09—Safety devices
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Control Of Resistance Heating (AREA)
Abstract
Circuit, electric pressure cooking saucepan, the method for protecting pressure switch are protected the embodiment of the invention discloses a kind of；Wherein, the protection circuit includes：The pressure switch being connected with power supply, the electric hot tray being connected with the pressure switch, and be connected and for the heating module for electric hot tray heating with the electric hot tray；The protection circuit further includes：Switch protection module, is connected in parallel with the pressure switch, for when the pressure switch goes off state by connected state, absorbing the energy for flowing through the pressure switch.Using technical solution described in the embodiment of the present invention, the service life for because of the phenomenon of arc discharge that the pressure between two contact of pressure switch is excessive and produces, improving pressure switch is avoided that.
Description
Technical field
The present invention relates to technical field of electric appliances, and in particular to a kind of to protect circuit and electric pressure cooking saucepan, protect pressure switch
Method.
Background technology
The service life of electric equipment products with forceful electric power pressure switch such as electric pressure cooking saucepan, suffers from the use of pressure switch
The influence in service life, if pressure switch goes wrong, may trigger security risk.At present, the operation principle of electric pressure cooking saucepan is：Voltage
When power pot starts culinary art, relay starts to be attracted, and pressure switch is on-state, at this time electric hot tray electrified regulation；And when culinary art
Into rising the pressure stage, for pot by compression swelling so as to apply downward pressure to pressure switch, pressure switch is changed into disconnected in pressure cooking
Open state.But due to being forceful electric power by pressure switch, pressure switch disconnects suddenly to produce arcing between two contact
Phenomenon, so as to accelerate contact oxidation, shortens the service life of pressure switch, and then also have impact on the use longevity of electric pressure cooking saucepan
Life.
The content of the invention
In view of this, present invention contemplates that the method for providing a kind of protection circuit and electric pressure cooking saucepan, protecting pressure switch, can keep away
Exempt from, because of the phenomenon of arc discharge that the pressure between two contact of pressure switch is excessive and produces, to improve the service life of pressure switch.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
On the one hand, an embodiment of the present invention provides one kind to protect circuit, including：The pressure switch being connected with power supply, with institute
The electric hot tray of pressure switch connection is stated, and is connected and for the heating module for electric hot tray heating with the electric hot tray；
The protection circuit further includes：
Switch protection module, is connected in parallel with the pressure switch, for being changed into when the pressure switch from connected state
During off-state, the energy for flowing through the pressure switch is absorbed.
In such scheme, alternatively, the pressure switch be connected to the power supply zero curve and the electric hot tray it
Between.
In such scheme, alternatively, the protection circuit further includes：Overcurrent protection module, is connected to the fire of the power supply
Between line and the heating module, for carrying out overcurrent protection when electric pressure cooking saucepan operating current is excessive.
In such scheme, alternatively, the heating module is connected between the electric hot tray and the overcurrent protection module.
In such scheme, alternatively, the heating module includes relay, for controlling the energization of the electric hot tray with breaking
Electricity.
In such scheme, alternatively, the switch protection module includes the first protection element.
In such scheme, alternatively, the switch protection module further includes：
The second protection element being connected in series with first protection element.
In such scheme, alternatively, first protection element is：Absorption Capacitance or discharge tube or varistor or
First absorption resistance；
Second protection element is：Second absorption resistance.
In such scheme, alternatively, the pressure switch includes two contacts, when the pressure switch is connected state
When, the voltage between described two contacts is greater than or equal to preset voltage value.
On the other hand, the embodiment of the present invention additionally provides a kind of electric pressure cooking saucepan, including protection circuit described above.
Another aspect, the embodiment of the present invention additionally provide a kind of method for protecting pressure switch, applied to protection circuit, institute
Stating protection circuit includes the pressure switch that is connected with power supply, the electric hot tray being connected with the pressure switch, and with the electric heating
Disk connects and for the heating module for electric hot tray heating；The described method includes：
Monitor the state of pressure switch；
When the pressure switch goes off state by connected state, control is protected with the switch that pressure switch is connected in parallel
Shield module absorbs the energy for flowing through the pressure switch.
In such scheme, alternatively, the switch protection module includes the first protection element.
In such scheme, alternatively, the switch protection module further includes：
The second protection element being connected in series with first protection element.
In such scheme, alternatively, first protection element is：Absorption Capacitance or discharge tube or varistor or
First absorption resistance；
Second protection element is：Second absorption resistance.
In such scheme, alternatively, the pressure switch includes two contacts, when the pressure switch is connected state
When, the voltage between described two contacts is greater than or equal to preset voltage value.
It is provided in an embodiment of the present invention to protect circuit, electric pressure cooking saucepan, the method for protecting pressure switch；Wherein, the protection
Circuit includes：The pressure switch being connected with power supply, the electric hot tray being connected with the pressure switch, and connect with the electric hot tray
Connect and for the heating module for electric hot tray heating；The protection circuit further includes：Switch protection module, with the pressure
Power switch in parallel connects, for when the pressure switch goes off state by connected state, absorption to flow through the pressure and opens
The energy of pass.In this way, by the in parallel switch protection module in the both sides of pressure switch, when the pressure switch is by connected state
When going off state, switch protection module can absorb the energy for flowing through the pressure switch, i.e. enable to pressure switch wink
When voltage when disconnecting between two contacts of pressure switch reduce, avoid producing because the pressure between two contact of pressure switch is excessive
Raw phenomenon of arc discharge, so as to avoid because caused by contact arc discharge accelerate contact oxidation the problem of, improve pressure switch
Service life, so as to also extend the service life of electric pressure cooking saucepan.
Brief description of the drawings
Fig. 1 is a kind of structure diagram for protecting circuit provided in an embodiment of the present invention；
Fig. 2 is another structure diagram for protecting circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of structure diagram of switch protection module provided in an embodiment of the present invention；
Fig. 4 (a) is the optional hardware of the protection circuit provided in an embodiment of the present invention comprising switch protection module shown in Fig. 3
Structure pressure switch in an ON state when schematic diagram；Fig. 4 (b) opens for provided in an embodiment of the present invention include shown in Fig. 3
Close schematic diagram of the optional hardware configuration of the protection circuit of protection module when pressure switch is off；
Fig. 5 is another structure diagram of switch protection module provided in an embodiment of the present invention；
Fig. 6 (a) is a kind of optional of the protection circuit provided in an embodiment of the present invention comprising switch protection module shown in Fig. 5
Hardware configuration pressure switch in an ON state when schematic diagram；Fig. 6 (b) includes Fig. 5 institutes to be provided in an embodiment of the present invention
Show a kind of schematic diagram of the optional hardware configuration of the protection circuit of switch protection module when pressure switch is off；
Fig. 7 (a) is that the another kind of the protection circuit provided in an embodiment of the present invention comprising switch protection module shown in Fig. 5 can
Select hardware configuration pressure switch in an ON state when schematic diagram；Fig. 7 (b) includes Fig. 5 to be provided in an embodiment of the present invention
Signal of another optional hardware configuration of the protection circuit of shown switch protection module when pressure switch is off
Figure；
Fig. 8 (a) can for another of the protection circuit provided in an embodiment of the present invention comprising switch protection module shown in Fig. 5
Select hardware configuration pressure switch in an ON state when schematic diagram；Fig. 8 (b) includes Fig. 5 to be provided in an embodiment of the present invention
Another signal of optional hardware configuration when pressure switch is off of the protection circuit of shown switch protection module
Figure；
Fig. 9 realizes flow diagram for a kind of method of protection pressure switch provided in an embodiment of the present invention.
Embodiment
In order to more fully hereinafter understand the features of the present invention and technology contents, below in conjunction with the accompanying drawings to the reality of the present invention
Now it is described in detail, appended attached drawing purposes of discussion only for reference, is not used for limiting the present invention.
Fig. 1 is a kind of structure diagram for protecting circuit provided in an embodiment of the present invention, and the protection circuit in this example should
For electric pressure cooking saucepan, as shown in Figure 1, the protection circuit mainly includes：The pressure switch 20 being connected with power supply 10, with the pressure
The electric hot tray 30 of 20 connection of power switch, and be connected and for the heating for the electric hot tray 30 heating with the electric hot tray 30
Module 40；The protection circuit further includes：
Switch protection module 50, is connected in parallel with the pressure switch 20, for when the pressure switch 20 is by connected state
When state goes off state, the energy for flowing through the pressure switch 20 is absorbed.
Wherein, pressure switch 20 is connected in series with electric hot tray 30.
In this way, since pressure switch 20 and electric hot tray 30 are connected in series, and what electric pressure cooking saucepan accessed at work is alternating current
Input, so, it is larger to flow through the electric current of pressure switch 20, such as, size of current pacifies (A) for 5 peace (A)~8, then, pressure is opened
It is also relatively large to close 20 voltages born.
Therefore, it is described when the pressure switch 20 is connected state when the pressure switch 20 includes two contacts
Voltage between two contacts is greater than or equal to preset voltage value.Since one of contact of described two contacts connects with power supply
Connect, another contact is connected with electric hot tray, when the pressure switch 20 goes off state by connected state, two contacts it
Between transient voltage it is larger, immediate current is also larger.
Here, the energy can be understood as energy or wink caused by immediate current when pressure switch 20 instantaneously disconnects
Between energy caused by voltage.
As a kind of optional embodiment, the pressure switch 20 is connected to the zero curve of the power supply 10 and the electricity
Between hot plate 30.
As a kind of optional embodiment, the heating module 40 includes relay K1, for controlling the electric hot tray
It is powered and powers off.
Specifically, when relay K1 is in attracting state, electric hot tray 30 is powered；When relay K1 is off
When, electric hot tray 30 powers off.
Alternatively, the heating module 40 further includes electric-controlled plate, for controlling the actuation and disconnection of the relay.
Fig. 2 shows another schematic diagram of protection circuit, as shown in Fig. 2, the protection circuit further includes：Overcurrent protection
Module 60, is connected between the firewire and the heating module 40 of the power supply 10, for excessive in electric pressure cooking saucepan operating current
Shi Jinhang overcurrent protections.
In an embodiment, overcurrent protection module 60 uses protective tube or current insurance silk, when pot of electric pressure occurs
Operation irregularity, and cause electric pressure cooking saucepan operating current it is excessive when, protective tube or current insurance silk can fuse automatically, different to prevent
Often electric current is excessive during work and the danger that brings, so as to play the role of overcurrent protection.In the present embodiment, one can be preset
Current threshold, i.e., when the operating current of electric pressure cooking saucepan reaches the current threshold, show that operating current is excessive, and at this time, overvoltage is protected
Protect module 30 and start overcurrent protection.
In this way, the reliability of electric pressure cooking saucepan work can be improved, so as to ensure that the safety of user.
As a kind of optional embodiment, the heating module 40 is connected to the electric hot tray 30 and the overcurrent protection mould
Between block 60.
As a kind of optional embodiment, the switch protection module 50 includes the first protection element 51.
Alternatively, first protection element 51 is：Absorption Capacitance C1 or discharge tube GDT1 or varistor ZNR1 or
First absorption resistance R1.
Exemplary, Fig. 3 shows a kind of structure diagram of switch protection module 50, and the switch protection module 50 is wrapped
Include the first protection element 51.Specifically, the switch protection module 50 is connected in parallel with the pressure switch 20, and described first protects
Protection element 51 is used for when the pressure switch 20 goes off state by connected state, and absorption flows through the pressure switch 20
Energy.
In this way, by the first protection element 51, when pressure switch instantaneously disconnects, can drag down pressure switch two contacts it
Between voltage, avoid because of the phenomenon of arc discharge that the pressure between two contact of pressure switch is excessive and produces, so as to avoid because of contact
The problem of accelerating contact oxidation caused by arcing, improves the service life of pressure switch.
Exemplary, for a kind of optional hardware configuration of the protection circuit comprising the first protection element 51, such as Fig. 4 (a)
And Fig. 4 (b) shown in, N represent zero curve, L represent firewire, SW1 represent pressure switch, K1 represent relay, F101 represent protective tube,
R1 represents absorption resistance；Specifically, the zero curve N of power supply is connected with one end of pressure switch SW1, be specially power supply zero curve N with
A contact of pressure switch SW1 is connected；The other end of pressure switch SW1 is connected with one end of electric hot tray 30, is specially pressure
Another contact of switch SW1 is connected with one end of electric hot tray 30；The other end of electric hot tray 30 is connected with one end of relay K1；After
The other end of electric appliance K1 is connected with one end of protective tube F101；The other end of protective tube F101 is connected with the firewire L of power supply, and first
Protection element 51 is absorption resistance R1.Fig. 4 (a) show pressure switch in an ON state when schematic diagram, at this time, absorb
Resistance R1 is in off state；Fig. 4 (b) show pressure switch in an ON state when schematic diagram, when pressure switch wink
When disconnecting, absorption resistance R1 is in channel status, can drag down the voltage between two contacts of pressure switch SW1, avoids because of pressure
The phenomenon of arc discharge that pressure between two contacts of power switch SW1 is excessive and produces, adds so as to avoid caused by contact arc discharge
The problem of fast contact oxidation, improve the service life of pressure switch SW1.
In an optional embodiment, the switch protection module 50 further includes：
The second protection element 52 being connected in series with first protection element 51.
Alternatively, first protection element 51 is：Absorption Capacitance C1 or discharge tube GDT1 or varistor ZNR1 or
First absorption resistance R1；
Second protection element 52 is：Second absorption resistance R2.
Exemplary, Fig. 5 shows another structure diagram of switch protection module 50, the switch protection module 50
Including the first protection element 51 and the second protection element 52.Wherein, the second protection element 52 and first protection element 51
It is connected in series, the switch protection module 50 is connected in parallel with the pressure switch 20.First protection element 51 and institute
State the second protection element 52 to be used to when the pressure switch 20 goes off state by connected state, absorption flows through the pressure
The energy of power switch 20.
In this way, due to there are the first protection element 51 and second protection element 52, instantaneously being disconnected in pressure switch
When, the voltage between two contacts of pressure switch can be dragged down more quickly, avoided because of the pressure mistake between two contact of pressure switch
The big and phenomenon of arc discharge that produces, so as to avoid because accelerate contact oxidation caused by contact arc discharge the problem of, improves pressure
The service life of switch.
Exemplary, for a kind of optional hard of the protection circuit comprising the first protection element 51 and the first protection element 22
Part structure, as shown in Fig. 6 (a) and Fig. 6 (b), N expressions zero curve, L expressions firewire, SW1 expression pressure switches, K1 expressions relay,
F101 represents that protective tube, C1 represent Absorption Capacitance；Specifically, the zero curve N of power supply is connected with one end of pressure switch SW1, specifically
It is connected with a contact of pressure switch SW1；The other end of pressure switch SW1 is connected with one end of electric hot tray 30, specially presses
Another contact of power switch SW1 is connected with one end of electric hot tray 30；The other end of electric hot tray 30 is connected with one end of relay K1；
The other end of relay K1 is connected with one end of protective tube F101；The other end of protective tube F101 is connected with the firewire L of power supply.The
One protection element 51 is Absorption Capacitance C1, the second protection element 52 is the second absorption resistance R2.Fig. 6 (a) is shown to be opened in pressure
Schematic diagram when closing SW1 in an ON state, at this time, the absorbing circuit of Absorption Capacitance C1 and the second absorption resistance R2 compositions are in
Off state；Fig. 6 (b) show pressure switch SW1 in an ON state when schematic diagram, when pressure switch SW1 instantaneously breaks
When opening, the absorbing circuit of Absorption Capacitance C1 and the second absorption resistance R2 compositions is in running order, can drag down the two of pressure switch
Voltage between contact, avoids because of the phenomenon of arc discharge that the pressure between two contacts of pressure switch SW1 is excessive and produces, so as to avoid
Because accelerate contact oxidation caused by contact arc discharge the problem of, the service life of pressure switch SW1 is improved.
Exemplary, for a kind of optional hard of the protection circuit comprising the first protection element 51 and the first protection element 22
Part structure, as shown in Fig. 7 (a) and Fig. 7 (b), N expressions zero curve, L expressions firewire, SW1 expression pressure switches, K1 expressions relay,
F101 represents that protective tube, ZNR1 represent thermistor；Specifically, the zero curve N of power supply is connected with one end of pressure switch SW1, tool
Body is connected with a contact of pressure switch SW1；The other end of pressure switch SW1 is connected with one end of electric hot tray 30, is specially
Another contact of pressure switch SW1 is connected with one end of electric hot tray 30；One end phase of the other end of electric hot tray 30 and relay K1
Even；The other end of relay K1 is connected with one end of protective tube F101；The firewire L phases of the other end of protective tube F101 and power supply
Even.First protection element 51 is varistor ZNR1, the second protection element 52 is the second absorption resistance R2.Fig. 7 (a) is shown
Pressure switch SW1 in an ON state when schematic diagram, at this time, varistor ZNR1 and the second absorption resistance R2 composition absorption
Circuit is in off state；Fig. 7 (b) show pressure switch SW1 in an ON state when schematic diagram, work as pressure switch
When SW1 is instantaneously disconnected, the absorbing circuit of varistor ZNR1 and the second absorption resistance R2 compositions is in running order, can drag down pressure
Voltage between two contacts of power switch SW1, avoids because of the arcing that the pressure between two contacts of pressure switch SW1 is excessive and produces
Phenomenon, so as to avoid because caused by contact arc discharge accelerate contact oxidation the problem of, improve pressure switch SW1 use the longevity
Life.
Exemplary, for a kind of optional hard of the protection circuit comprising the first protection element 51 and the first protection element 22
Part structure, as shown in Fig. 8 (a) and Fig. 8 (b), N expressions zero curve, L expressions firewire, SW1 expression pressure switches, K1 expressions relay,
F101 represents that protective tube, GDT1 represent discharge tube；Specifically, the zero curve N of power supply is connected with one end of pressure switch SW1, specifically
It is connected with a contact of pressure switch SW1；The other end of pressure switch SW1 is connected with one end of electric hot tray 30, specially presses
Another contact of power switch SW1 is connected with one end of electric hot tray 30；The other end of electric hot tray 30 is connected with one end of relay K1；
The other end of relay K1 is connected with one end of protective tube F101；The other end of protective tube F101 is connected with the firewire L of power supply.The
One protection element 51 is discharge tube GDT1, the second protection element 52 is the second absorption resistance R2.Fig. 8 (a) is shown to be opened in pressure
Schematic diagram when closing SW1 in an ON state, at this time, the absorbing circuit of discharge tube GDT1 and the second absorption resistance R2 compositions are in
Off state；Fig. 8 (b) show pressure switch SW1 in an ON state when schematic diagram, when pressure switch SW1 instantaneously breaks
When opening, the absorbing circuit of discharge tube GDT1 and the second absorption resistance R2 compositions is in running order, can drag down pressure switch SW1's
Voltage between two contacts, avoids because of the phenomenon of arc discharge that the pressure between two contacts of pressure switch SW1 is excessive and produces, so as to keep away
Exempt from because accelerate contact oxidation caused by contact arc discharge the problem of, to improve the service life of pressure switch SW1.
Certainly, except the combining form of protection element in above-mentioned cited these types of switch protection module, can also lead to
Cross other protection elements and absorb the moment that the pressure switch is flowed through when the pressure switch goes off state by connected state
Energy, details are not described herein.
Here, the protection circuit can be applied in the circuit design of electric pressure cooking saucepan.
This implementation protection circuit includes：The pressure switch being connected with power supply, the electric heating being connected with the pressure switch
Disk, and be connected and for the heating module for electric hot tray heating with the electric hot tray；The protection circuit further includes：
Switch protection module, is connected in parallel with the pressure switch, for going off state by connected state when the pressure switch
When, absorb the energy for flowing through the pressure switch.In this way, by the in parallel switch protection module in the both sides of pressure switch, when
When the pressure switch goes off state by connected state, switch protection module can absorb the energy for flowing through the pressure switch
Amount, i.e. voltage when enabling to the pressure switch instantaneously to disconnect between two contacts of pressure switch reduces, and avoids because of pressure switch
The phenomenon of arc discharge that pressure between two contacts is excessive and produces, so as to avoid contact oxidation is accelerated caused by contact arc discharge
The problem of, the service life of pressure switch is improved, so as to also extend the service life of electric pressure cooking saucepan.
The present embodiment also describes a kind of electric pressure cooking saucepan, and the electric pressure cooking saucepan includes protection circuit described above, described
Protection circuit mainly includes：The pressure switch 20 being connected with power supply 10, the electric hot tray 30 being connected with the pressure switch 20, and
It is connected with the electric hot tray 30 and for the heating module 40 for the electric hot tray 30 heating；The protection circuit further includes：
Switch protection module 50, is connected in parallel with the pressure switch 20, for when the pressure switch 20 is by connected state
When state goes off state, the energy for flowing through the pressure switch 20 is absorbed.
Electric pressure cooking saucepan described in the present embodiment includes whole technical sides of above-mentioned electric pressure cooking saucepan protection circuit whole embodiments
Case, details are not described herein.
Electric pressure cooking saucepan described in the present embodiment, by the in parallel switch protection module in the both sides of pressure switch, when the pressure
When power switch goes off state by connected state, switch protection module can absorb the energy for flowing through the pressure switch, i.e. energy
Enough so that voltage between two contacts of pressure switch reduces when pressure switch instantaneously disconnects, avoid because two contact of pressure switch it
Between pressure it is excessive and produce phenomenon of arc discharge, so as to avoid because caused by contact arc discharge accelerate contact oxidation the problem of,
The service life of pressure switch is improved, so as to also extend the service life of electric pressure cooking saucepan.
Fig. 9 realizes flow diagram, this example for a kind of method of protection pressure switch provided in an embodiment of the present invention
In protection pressure switch method be applied to protection circuit electric pressure cooking saucepan in, as shown in figure 9, it is described protection pressure open
The method of pass mainly includes the following steps that：
Step 901：Monitor the state of pressure switch.
In the present embodiment, the protection circuit mainly includes：The pressure switch 20 being connected with power supply 10, is opened with the pressure
The electric hot tray 30 of 20 connections is closed, and is connected and for the heating module for the electric hot tray 30 heating with the electric hot tray 30
40；The protection circuit further includes：
Switch protection module 50, is connected in parallel with the pressure switch 20, for when the pressure switch 20 is by connected state
When state goes off state, the energy for flowing through the pressure switch 20 is absorbed.
Wherein, pressure switch 20 is connected in series with electric hot tray 30.
Here, the state of Sensor monitoring pressure switch can be passed through.
Step 902：When the pressure switch goes off state by connected state, control is connected in parallel with pressure switch
Switch protection module absorb and flow through the energy of the pressure switch.
Wherein, the pressure switch includes two contacts, when the pressure switch is connected state, described two contacts
Between voltage be greater than or equal to preset voltage value.
In one embodiment, the switch protection module 50 includes the first protection element 51.
Alternatively, first protection element 51 is：Absorption Capacitance C1 or discharge tube GDT1 or varistor ZNR1 or
First absorption resistance R1.
In one embodiment, the switch protection module 50 further includes：
The second protection element 52 being connected in series with first protection element 51.
Alternatively, first protection element 51 is：Absorption Capacitance C1 or discharge tube GDT1 or varistor ZNR1 or
First absorption resistance R1；
Second protection element 52 is：Second absorption resistance R2.
The method of protection pressure switch provided in an embodiment of the present invention, monitors the state of the pressure switch, when the pressure
When power switch goes off state by connected state, control is absorbed with the switch protection module that pressure switch is connected in parallel flows through institute
State the energy of pressure switch, i.e. voltage when enabling to the pressure switch instantaneously to disconnect between two contacts of pressure switch reduces,
Avoid, because of the phenomenon of arc discharge that the pressure between two contact of pressure switch is excessive and produces, so as to avoid because of contact arc discharge causing
Acceleration contact oxidation the problem of, the service life of pressure switch is improved, so as to also extend the service life of electric pressure cooking saucepan.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, can pass through it
Its mode is realized.Apparatus embodiments described above are only schematical, for example, the division of the unit, is only
A kind of division of logic function, can have other dividing mode, such as when actually realizing：Multiple units or component can combine, or
Another system is desirably integrated into, or some features can be ignored, or do not perform.In addition, shown or discussed each composition portion
Point mutual coupling or direct-coupling or communication connection can be the INDIRECT COUPLINGs by some interfaces, equipment or unit
Or communication connection, can be electrical, mechanical or other forms.
The above-mentioned unit illustrated as separating component can be or may not be physically separate, be shown as unit
The component shown can be or may not be physical location；Both a place can be located at, multiple network lists can also be distributed to
In member；Partly or entirely unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit, also may be used
To be each unit individually as a unit, can also two or more units integrate in a unit；It is above-mentioned
Integrated unit can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
The relevant hardware of programmed instruction is completed, and foregoing program can be stored in computer read/write memory medium, which exists
During execution, execution the step of including above method embodiment；And foregoing storage medium includes：Movable storage device, read-only deposit
Reservoir (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or
CD etc. is various can be with the medium of store program codes.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and is used as independent product
Sale in use, can also be stored in a computer read/write memory medium.Based on such understanding, the present invention is implemented
The part that the technical solution of example substantially in other words contributes the prior art can be embodied in the form of software product,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
It is personal computer, server or network equipment etc.) perform all or part of each embodiment the method for the present invention.
And foregoing storage medium includes：Movable storage device, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (15)
1. one kind protection circuit, it is characterised in that including：The pressure switch being connected with power supply, is connected with the pressure switch
Electric hot tray, and be connected and for the heating module for electric hot tray heating with the electric hot tray；The protection circuit also wraps
Include：
Switch protection module, is connected in parallel with the pressure switch, for being gone off when the pressure switch by connected state
During state, the energy for flowing through the pressure switch is absorbed.
2. protection circuit according to claim 1, it is characterised in that the pressure switch is connected to the zero of the power supply
Between line and the electric hot tray.
3. protection circuit according to claim 1, it is characterised in that the protection circuit further includes：Overcurrent protection module,
It is connected between the firewire of the power supply and the heating module, for carrying out overcurrent guarantor when electric pressure cooking saucepan operating current is excessive
Shield.
4. protection circuit according to claim 3, it is characterised in that the heating module is connected to the electric hot tray and institute
State between overcurrent protection module.
5. protection circuit according to claim 1, it is characterised in that the heating module includes relay, for controlling
The energization and power-off of the electric hot tray.
6. protection circuit according to claim 1, it is characterised in that the switch protection module includes the first protection member
Part.
7. protection circuit according to claim 6, it is characterised in that the switch protection module further includes：
The second protection element being connected in series with first protection element.
8. protection circuit according to claim 7, it is characterised in that first protection element is：Absorption Capacitance is put
Fulgurite or varistor or the first absorption resistance；
Second protection element is：Second absorption resistance.
9. protection circuit according to claim 1, it is characterised in that the pressure switch includes two contacts, when described
When pressure switch is connected state, the voltage between described two contacts is greater than or equal to preset voltage value.
10. a kind of electric pressure cooking saucepan, it is characterised in that protect circuit including claim 1 to 9 any one of them.
11. a kind of method for protecting pressure switch, applied to protection circuit, it is characterised in that the protection circuit includes and electricity
The pressure switch of source connection, the electric hot tray being connected with the pressure switch, and be connected and with the electric hot tray for being described
The heating module of electric hot tray heating；The described method includes：
Monitor the state of pressure switch；
When the pressure switch goes off state by connected state, the switch protection mould being connected in parallel with pressure switch is controlled
Block absorbs the energy for flowing through the pressure switch.
12. according to the method for claim 11, it is characterised in that the switch protection module includes the first protection element.
13. according to the method for claim 12, it is characterised in that the switch protection module further includes：
The second protection element being connected in series with first protection element.
14. according to the method for claim 13, it is characterised in that first protection element is：Absorption Capacitance or electric discharge
Pipe or varistor or the first absorption resistance；
Second protection element is：Second absorption resistance.
15. according to the method for claim 14, it is characterised in that the pressure switch includes two contacts, when the pressure
When power switch is connected state, the voltage between described two contacts is greater than or equal to preset voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934246.5A CN107997571A (en) | 2016-10-31 | 2016-10-31 | It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934246.5A CN107997571A (en) | 2016-10-31 | 2016-10-31 | It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107997571A true CN107997571A (en) | 2018-05-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610934246.5A Pending CN107997571A (en) | 2016-10-31 | 2016-10-31 | It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch |
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| CN (1) | CN107997571A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10390656B2 (en) | 2017-08-09 | 2019-08-27 | Sharkninja Operating Llc | Cooking device and components thereof |
| USD873602S1 (en) | 2018-08-09 | 2020-01-28 | Sharkninja Operating Llc | Lid part of a food preparation device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202033451U (en) * | 2011-04-13 | 2011-11-09 | 深圳市硕凯电子有限公司 | Circuit of aging device for gas discharge tubes |
| CN202426272U (en) * | 2011-12-31 | 2012-09-12 | 美的集团有限公司 | Control circuit of electric pressure cooker |
| CN202908504U (en) * | 2012-09-15 | 2013-05-01 | 林国强 | Pressure sensing energy-saving control circuit device of electric pressure cooker |
| CN206896236U (en) * | 2016-10-31 | 2018-01-19 | 佛山市顺德区美的电热电器制造有限公司 | A kind of protection circuit and electric pressure cooking saucepan |
-
2016
- 2016-10-31 CN CN201610934246.5A patent/CN107997571A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202033451U (en) * | 2011-04-13 | 2011-11-09 | 深圳市硕凯电子有限公司 | Circuit of aging device for gas discharge tubes |
| CN202426272U (en) * | 2011-12-31 | 2012-09-12 | 美的集团有限公司 | Control circuit of electric pressure cooker |
| CN202908504U (en) * | 2012-09-15 | 2013-05-01 | 林国强 | Pressure sensing energy-saving control circuit device of electric pressure cooker |
| CN206896236U (en) * | 2016-10-31 | 2018-01-19 | 佛山市顺德区美的电热电器制造有限公司 | A kind of protection circuit and electric pressure cooking saucepan |
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