CN206896236U - A kind of protection circuit and electric pressure cooking saucepan - Google Patents
A kind of protection circuit and electric pressure cooking saucepan Download PDFInfo
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- CN206896236U CN206896236U CN201621164765.XU CN201621164765U CN206896236U CN 206896236 U CN206896236 U CN 206896236U CN 201621164765 U CN201621164765 U CN 201621164765U CN 206896236 U CN206896236 U CN 206896236U
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- Prior art keywords
- pressure switch
- protection
- protection circuit
- switch
- pressure
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Abstract
The utility model embodiment discloses a kind of protection circuit and electric pressure cooking saucepan；Wherein, the protection circuit includes：The pressure switch being connected with power supply, the electric hot tray being connected with the pressure switch, and the heating module for being connected with the electric hot tray and being heated for the electric hot tray；The protection circuit also includes：It is connected in parallel with the pressure switch, when the pressure switch goes off state by connected state, absorbs the switch protection module for the energy for flowing through the pressure switch.Using technical scheme described in the utility model embodiment, be avoided that because the pressure between the contact of pressure switch two is excessive and caused by phenomenon of arc discharge, improve the service life of pressure switch.
Description
Technical field
It the utility model is related to technical field of electric appliances, and in particular to a kind of protection circuit and electric pressure cooking saucepan.
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 life-span, if pressure switch goes wrong, potential safety hazard may be triggered.At present, the operation principle of electric pressure cooking saucepan is：Voltage
When power pot starts culinary art, relay starts adhesive, and pressure switch is on-state, now 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, the service life of pressure switch is shortened, and then also have impact on the use longevity of electric pressure cooking saucepan
Life.
Utility model content
In view of this, the utility model it is expected to provide a kind of protection circuit and electric pressure cooking saucepan, is avoided that because of pressure switch two
The excessive and caused phenomenon of arc discharge of pressure between contact, improve the service life of pressure switch.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
On the one hand, the utility model embodiment provides a kind of protection circuit, including：The pressure switch being connected with power supply,
The electric hot tray being connected with the pressure switch, and the heating module for being connected with the electric hot tray and being heated for the electric hot tray；
The protection circuit also includes：
It is connected in parallel with the pressure switch, and when the pressure switch goes off state by connected state, absorbs
Flow through the switch protection module of the energy of the pressure switch.
In such scheme, alternatively, the pressure switch be connected to the power supply zero line and the electric hot tray it
Between.
In such scheme, alternatively, the protection circuit also includes：It is connected to the live wire of the power supply and the heated mould
Between block, the overcurrent protection module of overcurrent protection is carried out 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 the relay for controlling the energization and power-off of the electric hot tray.
In such scheme, alternatively, the switch protection module includes the first protection element.
In such scheme, alternatively, the switch protection module also 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 piezo-resistance 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 more than or equal to preset voltage value.
On the other hand, the utility model embodiment additionally provides a kind of electric pressure cooking saucepan, including protection circuit described above.
The protection circuit and electric pressure cooking saucepan that the utility model embodiment provides；Wherein, the protection circuit includes：With power supply
The pressure switch of connection, the electric hot tray being connected with the pressure switch, and be connected and with the electric hot tray for being the electricity
The heating module of hot plate heating；The protection circuit also includes：Switch protection module, it is connected in parallel, uses with the pressure switch
In when the pressure switch goes off state by connected state, the energy for flowing through the pressure switch is absorbed.So, pass through
In the both sides paralleling switch protection module of pressure switch, when the pressure switch goes off state by connected state, by opening
Close protection module and absorb and flow through the energy of the pressure switch, i.e. pressure switch when enabling to the pressure switch instantaneously to disconnect
Voltage between two contacts reduces, avoid because the pressure between the contact of pressure switch two is excessive and caused by phenomenon of arc discharge, so as to
Avoid because accelerate contact oxidation caused by contact arc discharge the problem of, the service life of pressure switch is improved, so as to also prolong
The service life of electric pressure cooking saucepan is grown.
Brief description of the drawings
Fig. 1 is a kind of structural representation for protection circuit that the utility model embodiment provides；
Fig. 2 is the structural representation for another protection circuit that the utility model embodiment provides；
Fig. 3 is a kind of structural representation for the switch protection module that the utility model embodiment provides；
Fig. 4 (a) is the optional comprising the protection circuit of switch protection module shown in Fig. 3 of the utility model embodiment offer
Hardware configuration pressure switch in an ON state when schematic diagram；Fig. 4 (b) is the utility model embodiment offer comprising figure
Schematic diagram of the optional hardware configuration of the protection circuit of switch protection module shown in 3 when pressure switch is off；
Fig. 5 is another structural representation for the switch protection module that the utility model embodiment provides；
Fig. 6 (a) is one kind for including the protection circuit of switch protection module shown in Fig. 5 that the utility model embodiment provides
Optional hardware configuration pressure switch in an ON state when schematic diagram；Fig. 6 (b) is the bag that the utility model embodiment provides
A kind of optional hardware configuration showing when pressure switch is off of protection circuit containing switch protection module shown in Fig. 5
It is intended to；
Fig. 7 (a) is the another comprising the protection circuit of switch protection module shown in Fig. 5 of the utility model embodiment offer
Kind optional hardware configuration pressure switch in an ON state when schematic diagram；Fig. 7 (b) is what the utility model embodiment provided
Another optional hardware configuration of protection circuit comprising switch protection module shown in Fig. 5 is when pressure switch is off
Schematic diagram；
Fig. 8 (a) is the another comprising the protection circuit of switch protection module shown in Fig. 5 of the utility model embodiment offer
Kind optional hardware configuration pressure switch in an ON state when schematic diagram；Fig. 8 (b) is what the utility model embodiment provided
Another optional hardware configuration of protection circuit comprising switch protection module shown in Fig. 5 is when pressure switch is off
Schematic diagram.
Embodiment
The characteristics of in order to more fully hereinafter understand the utility model and technology contents, below in conjunction with the accompanying drawings to this practicality
New realization is described in detail, appended accompanying drawing purposes of discussion only for reference, is not used for limiting the utility model.
Fig. 1 is a kind of structural representation for protection circuit that the utility model embodiment provides, the protection electricity in this example
Road is applied to 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 institute
The electric hot tray 30 of the connection of pressure switch 20 is stated, and is connected and with the electric hot tray 30 for being the electric hot tray 30 heating
Heating module 40；The protection circuit also includes：
Switch protection module 50, it 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.
So, because pressure switch 20 and electric hot tray 30 are connected in series, and what electric pressure cooking saucepan accessed at work is civil power
Input, so, it is larger to flow through the electric current of pressure switch 20, such as, size of current is that (A) is pacified in 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 more than or equal to preset voltage value.Because 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 line 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 also includes electric-controlled plate, for controlling the adhesive and disconnection of the relay.
Fig. 2 shows another schematic diagram of protection circuit, as shown in Fig. 2 the protection circuit also includes：Overcurrent protection
Module 60, it is connected between the live wire 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 a part 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, now, 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 piezo-resistance ZNR1 or
First absorption resistance R1.
Exemplary, Fig. 3 shows a kind of structural representation 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 the pressure between the contact of pressure switch two is excessive and caused by phenomenon of arc discharge, so as to avoid because of contact
The problem of accelerating contact oxidation caused by arcing, improve 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 line, L represent live wire, SW1 represent pressure switch, K1 represent relay, F101 represent protective tube,
R1 represents absorption resistance；Specifically, the zero line N of power supply is connected with pressure switch SW1 one end, the specially zero line N of power supply with
A pressure switch SW1 contact is connected；The pressure switch SW1 other end is connected with one end of electric hot tray 30, specially pressure
Switch SW1 another contact is connected with one end of electric hot tray 30；The other end of electric hot tray 30 is connected with relay K1 one end；After
The electrical equipment K1 other end is connected with protective tube F101 one end；The protective tube F101 other end is connected with the live wire 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, now, 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 pressure switch SW1 two contacts, avoids because of pressure
The excessive and caused phenomenon of arc discharge of pressure between power switch SW1 two contacts, adds so as to avoid caused by contact arc discharge
The problem of fast contact oxidation, improve pressure switch SW1 service life.
In an optional embodiment, the switch protection module 50 also 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 piezo-resistance ZNR1 or
First absorption resistance R1；
Second protection element 52 is：Second absorption resistance R2.
Exemplary, Fig. 5 shows another structural representation 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 the first protection element 51 and second protection element 52 be present, instantaneously 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 the contact of pressure switch two
Big and caused phenomenon of arc discharge, so as to avoid because caused by contact arc discharge accelerate contact oxidation the problem of, improve 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 line, L expressions live wire, SW1 expression pressure switches, K1 expressions relay,
F101 represents that protective tube, C1 represent Absorption Capacitance；Specifically, the zero line N of power supply is connected with pressure switch SW1 one end, specifically
It is connected with a pressure switch SW1 contact；The pressure switch SW1 other end is connected with one end of electric hot tray 30, specially presses
Power switch SW1 another contact is connected with one end of electric hot tray 30；The other end of electric hot tray 30 is connected with relay K1 one end；
The relay K1 other end is connected with protective tube F101 one end；The protective tube F101 other end is connected with the live wire 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, now, 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, avoid because the pressure between the contacts of pressure switch SW1 two is excessive and caused by phenomenon of arc discharge, so as to avoid
Because accelerate contact oxidation caused by contact arc discharge the problem of, pressure switch SW1 service life 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 line, L expressions live wire, SW1 expression pressure switches, K1 expressions relay,
F101 represents that protective tube, ZNR1 represent thermistor；Specifically, the zero line N of power supply is connected with pressure switch SW1 one end, tool
Body is connected with a pressure switch SW1 contact；The pressure switch SW1 other end is connected with one end of electric hot tray 30, is specially
Pressure switch SW1 another contact 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 relay K1 other end is connected with protective tube F101 one end；The live wire L phases of the protective tube F101 other end and power supply
Even.First protection element 51 is piezo-resistance 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, now, piezo-resistance 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 instantaneously disconnects, the absorbing circuit of piezo-resistance ZNR1 and the second absorption resistance R2 compositions is in running order, can drag down pressure
Power switch SW1 two contacts between voltage, avoid because the pressure between the contacts of pressure switch SW1 two is excessive and caused by arcing
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 line, L expressions live wire, SW1 expression pressure switches, K1 expressions relay,
F101 represents that protective tube, GDT1 represent discharge tube；Specifically, the zero line N of power supply is connected with pressure switch SW1 one end, specifically
It is connected with a pressure switch SW1 contact；The pressure switch SW1 other end is connected with one end of electric hot tray 30, specially presses
Power switch SW1 another contact is connected with one end of electric hot tray 30；The other end of electric hot tray 30 is connected with relay K1 one end；
The relay K1 other end is connected with protective tube F101 one end；The protective tube F101 other end is connected with the live wire 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, now, 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, avoid because the pressure between the contacts of pressure switch SW1 two is excessive and caused by phenomenon of arc discharge, so as to keep away
Exempt from because accelerate contact oxidation caused by contact arc discharge the problem of, to improve pressure switch SW1 service life.
Certainly, except the combining form of protection element in above-mentioned this cited several 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, it will not be repeated here.
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 also includes：
Switch protection module, it 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.So, 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 excessive and caused phenomenon of arc discharge of pressure between two contacts, accelerates contact oxidation so as to avoid 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 also includes：
Switch protection module 50, it 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, it will not be repeated here.
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 the contact of pressure switch two it
Between the excessive and caused phenomenon of arc discharge of pressure, 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.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses
Or replace, it should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with the power
The protection domain that profit requires is defined.
Claims (10)
- A kind of 1. protection circuit, it is characterised in that including：The pressure switch being connected with power supply, it is connected with the pressure switch Electric hot tray, and the heating module for being connected with the electric hot tray and being heated for the electric hot tray；The protection circuit also includes：It is connected in parallel with the pressure switch, and when the pressure switch goes off state by connected state, absorption flows through The switch protection module of the energy of the pressure switch.
- 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 also includes：It is connected to the electricity Between the live wire in source and the heating module, the overcurrent protection mould of overcurrent protection is carried out when electric pressure cooking saucepan operating current is excessive Block.
- 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 controlling the electric hot tray The relay being powered with power-off.
- 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 also 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 piezo-resistance 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 more than or equal to preset voltage value.
- 10. a kind of electric pressure cooking saucepan, it is characterised in that including the protection circuit described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164765.XU CN206896236U (en) | 2016-10-31 | 2016-10-31 | A kind of protection circuit and electric pressure cooking saucepan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164765.XU CN206896236U (en) | 2016-10-31 | 2016-10-31 | A kind of protection circuit and electric pressure cooking saucepan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206896236U true CN206896236U (en) | 2018-01-19 |
Family
ID=61294119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621164765.XU Expired - Fee Related CN206896236U (en) | 2016-10-31 | 2016-10-31 | A kind of protection circuit and electric pressure cooking saucepan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206896236U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107997571A (en) * | 2016-10-31 | 2018-05-08 | 佛山市顺德区美的电热电器制造有限公司 | It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch |
-
2016
- 2016-10-31 CN CN201621164765.XU patent/CN206896236U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107997571A (en) * | 2016-10-31 | 2018-05-08 | 佛山市顺德区美的电热电器制造有限公司 | It is a kind of to protect circuit and electric pressure cooking saucepan, the method for protection pressure switch |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180119 Termination date: 20201031 |
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| CF01 | Termination of patent right due to non-payment of annual fee |