CN207518562U - A kind of control circuit of food processor - Google Patents
A kind of control circuit of food processor Download PDFInfo
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- CN207518562U CN207518562U CN201721568818.9U CN201721568818U CN207518562U CN 207518562 U CN207518562 U CN 207518562U CN 201721568818 U CN201721568818 U CN 201721568818U CN 207518562 U CN207518562 U CN 207518562U
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Abstract
The utility model embodiment discloses a kind of control circuit of food processor, including：Load circuit and power switch circuit, the power switch circuit include：For controlling the first switch of the load circuit works, the power switch circuit further includes：Varistor is connected in parallel on the both ends of the first switch, for turning on and off the dash current generated between two terminal contacts of first switch described in abrupt release in the first switch.Pass through the utility model embodiment, the dash current generated between two terminal contacts of first switch is discharged by the varistor, the arcing for reducing due to dash current and two contact of first switch being caused to generate, so as to which two contact of first switch be avoided to burn, and then reduce influence of the dash current to two terminal contacts of first switch.
Description
Technical field
The utility model is related to cooking equipment control technology, espespecially a kind of control circuit of food processor.
Background technology
Food processor is electrically connected by power cord with city, and when user has used food processor every time, needing will be electric
The plug of source line is pulled from socket, so that food processor powers off, largely influences user experience.In the relevant technologies
In, control the power-off of food processor by increasing switch.But due to using the appearances such as capacitance, inductance in food processor
Property and perceptual component, switch on and off moment in user operable switch, very strong impact can be generated between two contacts of switch
Electric current, the dash current cause two contacts of switch to generate arcing, in this way burn two contact of switch, and two contacts of switch can shape
Into adhesion, the service life of switch is influenced.
Utility model content
The utility model embodiment provides a kind of control circuit of food processor, can be between two contact of release switch
The dash current of generation.
The utility model embodiment adopts the following technical scheme that：
A kind of control circuit of food processor, including load circuit and power switch circuit, the power switch circuit
Including：For controlling the first switch of the load circuit works, the power switch circuit further includes：
Varistor is connected in parallel on the both ends of the first switch, is released for turning on and off moment in the first switch
Put the dash current generated between two terminal contacts of first switch.
Optionally, the control circuit of food processor further includes：Chip power circuit, control chip and second switch；Its
In,
The chip power circuit, input terminal, the first output terminal and second output terminal be respectively connected to alternating current firewire,
The input terminal of the zero curve of the alternating current and the control chip, the first switch are located at the input terminal of the chip power circuit
Between the firewire of the alternating current, the chip power circuit is used for the exchange of the alternating current when the first switch is closed
Voltage is converted into DC voltage, and it is the control chip power supply to pass through the DC voltage being converted into；
The control chip, output terminal are connected to the first input end of the second switch, and the control chip is used for
Control the opening and closing of the second switch；
The second switch, the second input terminal and output terminal are respectively connected to the firewire of the alternating current and the load electricity
The input terminal on road, the second switch are used to control the load circuit works by the opening and closing of itself.
Optionally, the control circuit of food processor further includes：Electrolytic capacitor and the first zero cross detection circuit；Wherein,
First zero cross detection circuit, for detecting voltage between the first switch and the chip power circuit
Zero；
The electrolytic capacitor is connected in parallel between the chip power circuit and ground wire, for being closed in the first switch
When store electric energy and when the first switch disconnects release storage electric energy so that it is described control chip using release
Electric energy is kept powered on after first switch disconnection；
The control chip if can't detect zero for first zero cross detection circuit, controls described second to open
Shutdown is opened.
Optionally, the capacity of the electrolytic capacitor is greater than or equal to 47uf.
Optionally, the control circuit of food processor further includes：Second zero cross detection circuit；
Second zero cross detection circuit, for detecting the zero of voltage on the firewire of the alternating current；
The control chip, for after first zero cross detection circuit can't detect zero, if second mistake
Zero detection circuit detects first zero, then the second switch is controlled to disconnect.
Optionally, the input terminal of the load circuit and output terminal are respectively connected to the firewire and zero curve of alternating current, and described
One switch is located between the input terminal of the load circuit and the firewire of the alternating current.
Optionally, two terminal contacts of first switch pass through gold-plated processing.
Optionally, the model 10D561K of the varistor.
Optionally, the first switch is switched for button switch or ship type.
Optionally, the control circuit of food processor further includes：
Power supply indicator, for representing whether the load circuit works by the light on and off of the power supply indicator.
The advantageous effect of the utility model embodiment includes：
1st, the utility model embodiment scheme control load circuit works first switch both ends parallel connection varistor,
First switch turns on and off moment by the dash current generated between varistor release two terminal contacts of first switch, subtracts
The arcing lacked due to dash current and two contact of first switch is caused to generate, so as to which two contact of first switch be avoided to burn
It burns, and then reduces influence of the dash current to two terminal contacts of first switch.
2nd, first switch can be arranged in the circuit of chip power circuit by the utility model embodiment scheme, due to core
Transformer energy storage acts in the circuit of piece power circuit, and two terminal contacts of first switch can generate dash current, by being opened first
The dash current of two terminal contacts of first switch generation can be discharged by closing the varistor of both ends parallel connection, and reduction dash current is to the
The influence of one switch ends contact, so as to promote the functional reliability of food processor.Meanwhile control chip that can also add in food
Second switch is controlled to disconnect powering off load circuit when work machine is in standby mode, reduces the standby work(of food processor
Consumption, realizes energy-efficient effect.
3rd, the utility model embodiment scheme has avoided the occurrence of second by the way that chip active control second switch is controlled to disconnect
Since the situation that can not realize that second switch disconnects is sucked in two contact of second switch after switch power down, so as to ensure that food processing
The reliability of the control circuit of machine.
4th, the capacity of the utility model embodiment scheme electrolytic capacitor is greater than or equal to 47uf, and such electrolytic capacitor can be deposited
Enough electric energy are stored up, when first switch disconnects, since electrolytic capacitor release there are enough electric energy, control chip just has enough
Time controls second switch to disconnect.
5th, the utility model embodiment scheme controls second switch to disconnect in the zero of voltage on firewire, that is to say, that
On firewire during voltage minimum control second switch disconnect, the dash current in this way in load circuit is just smaller, reduce by
In influence of the dash current to two contact of second switch.
6th, first switch can also be located at the input terminal of load circuit and the fire of alternating current in the utility model embodiment scheme
Between line, with by first switch cut-off control whether load circuit connect with firewire, the control circuit of food processor
Realization it is very simple, do not need to excessive component so that the layout of component on a printed circuit board is simpler.
7th, the utility model embodiment scheme can improve first switch by two terminal contacts of first switch by gold-plated processing
The high-temperature stability and corrosion resistance characteristic of two terminal contacts even if dash current passes through first switch, can mitigate first switch two
The arcing that terminal contacts generate promotes the reliability of first switch.
8th, the varistor of the utility model embodiment Scheme Choice model 10D561K, the varistor of the model, most
For big continuous operating voltage up to 350V, maximum limitation voltage and maximum limitation electric current are respectively 930V and 25A, are had stronger
Proof voltage impacts and resistance to rush of current, it is ensured that the service life of varistor.The varistor of the model is household simultaneously
More common specification, cheap on electric appliance.
Other features and advantages of the utility model will illustrate, also, in the following description partly from specification
In become apparent or understood by implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is realized and is obtained in specification, claims and attached drawing.
Description of the drawings
Attached drawing is used for providing further understanding technical solutions of the utility model, and a part for constitution instruction,
With explaining the technical solution of the utility model together with embodiments herein, do not form to technical solutions of the utility model
Limitation.
Fig. 1 is the structure diagram of the control circuit of a kind of food processor that the utility model embodiment provides；
Fig. 2 is the structure diagram of the control circuit of another food processor that the utility model embodiment provides；
Fig. 3 is the structure diagram of the control circuit of another food processor that the utility model embodiment provides.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with attached drawing to this
The embodiment of utility model is described in detail.It should be noted that in the absence of conflict, embodiment in the application and
Feature in embodiment mutually can be combined arbitrarily.
Step shown in the flowchart of the accompanying drawings can be in the computer system of such as a group of computer-executable instructions
It performs.Also, although logical order is shown in flow charts, it in some cases, can be to be different from herein suitable
Sequence performs shown or described step.
In order to solve the above technical problems, the utility model embodiment adopts the following technical scheme that：
Embodiment one
A kind of control circuit of food processor, as shown in Figure 1, the control circuit 1 of the food processor includes load electricity
Road 11 and power switch circuit 12, power switch circuit 12 include：For controlling the first switch 121 of the work of load circuit 11,
Power switch circuit 12 further includes：
Varistor 122 is connected in parallel on the both ends of first switch 121, is released for turning on and off moment in first switch 121
Put the dash current generated between 121 liang of terminal contacts of first switch.
It should be noted that load circuit 11 includes heating unit and motor.Food processor includes but not limited to：Soya-bean milk
Machine, juice extractor and cooking machine.L in Fig. 1 represents firewire, and N represents zero curve.
In the utility model embodiment, load circuit 11 is controlled to work by first switch 121, in first switch 121
Both ends parallel connection varistor 122, first switch 121 turn on and off moment pass through the varistor 122 discharge first switch
The dash current generated between 121 liang of terminal contacts reduces due to dash current and causes what 121 liang of contacts of first switch generated
Arcing causes the first two contacts of opening the light to form adhesion, and then reduces so as to which 121 liang of contacts of first switch be avoided to occur burning
Influence of the dash current to 121 liang of terminal contacts of first switch extends the service life of first switch 121.
Embodiment two
The control circuit of embodiment food processor on the basis of embodiment one can also include：Chip power electricity
Road, control chip and second switch.
Optionally, as shown in Figure 1, the control circuit 1 of food processor can also include：Chip power circuit 13, control
Chip 14 and second switch 15.
Chip power circuit 13, input terminal, the first output terminal and second output terminal are respectively connected to the firewire of alternating current, city
The zero curve of electricity and the input terminal of control chip 14, first switch 121 are located at the input terminal of chip power circuit 13 and the fire of alternating current
Between line, chip power circuit 13 is used to that the alternating voltage of alternating current to be converted into DC voltage when first switch 121 is closed, and
By the DC voltage that is converted into, chip 14 is powered in order to control.
Chip 14 is controlled, output terminal is connected to the first input end of second switch 15, and control chip 14 is for controlling the
The opening and closing of two switches 15.
Second switch 15, the second input terminal and output terminal are respectively connected to the input of the firewire and load circuit 11 of alternating current
End, second switch 15 are used to load circuit 11 be controlled to work by the opening and closing of itself.
It should be noted that second switch 15 can be electronic switch.Since first switch 121 controls chip power electric
Whether road 13 connects firewire, and when chip power circuit 13 connects firewire, chip power circuit 13 in order to control power by chip 14,
Control chip 14 controls chip 14 that second switch 15 is controlled to be closed after the power is turned on, and electricity is loaded by the closure of second switch 15
Road 11 works, and therefore, first switch 121 is to be indirectly controlled load circuit 11 to work.
In the utility model embodiment, first switch 121 is arranged in the circuit at 13 place of chip power circuit, when
When first switch 121 is connected in user, chip power circuit 13 starts chip 14 in order to control and powers, and controls electric control the on chip 14
Two switches, 15 conducting, the conducting of second switch 15 cause load circuit 11 to work.Moment is connected in first switch 121, due to core
Transformer (does not mark) energy storage effect in the circuit of piece power circuit 13 in Fig. 1, and 121 liang of terminal contacts of first switch can generate punching
Electric current is hit, is produced by the way that 121 liang of terminal contacts of the first switch can be discharged in the varistor 122 of 121 both ends of first switch parallel connection
Raw dash current reduces influence of the dash current to 121 liang of terminal contacts of first switch, so as to promote the work of food processor
Reliability.When user disconnects first switch 121, chip power circuit 13 stops chip 14 in order to control and powers, and controls chip 14
Power down results in second switch 15 and disconnects, so that load circuit 11 is stopped.Due to first switch 121 be not disposed on it is negative
In the circuit for carrying circuit 11, therefore the dash current that the capacitives such as capacitance, inductance in load circuit 11 and perceptual component generate
First switch 121 can't be passed through, first switch 121 would not also be had an impact.Meanwhile control chip 14 also can be in food
Second switch 15 is controlled to disconnect powering off load circuit 11 when processing machine is in standby mode, reduces treating for food processor
Machine power consumption realizes energy-efficient effect.
Embodiment three
The embodiment can't detect electricity between first switch 121 and chip power circuit 13 on the basis of embodiment two
The zero time control coremaking piece 14 of pressure controls second switch 15 to disconnect.
Optionally, as shown in Fig. 2, the control circuit 1 of food processor can also include：16 and first zero passage of electrolytic capacitor
Detection circuit (does not mark) in Fig. 2.
It should be noted that the L in Fig. 2 represents firewire, N represents zero curve.
First zero cross detection circuit, for detecting the zero of voltage between first switch 121 and chip power circuit 13.
It should be noted that the detection of the first zero cross detection circuit is between first switch 121 and chip power circuit 13
The zero of voltage, when first switch 121 is closed, i.e., chip power circuit 13 is connected with firewire, the first zero passage detection electricity
Road is able to detect that zero, it may also be said to which the first zero cross detection circuit can be periodically detected zero；When first switch 121
During disconnection, i.e., chip power circuit 13 is to disconnect with firewire, and the first zero cross detection circuit can't detect zero, it may also be said to the
The duration that one zero cross detection circuit can't detect zero is more than scheduled duration.
Electrolytic capacitor 16 is connected in parallel between chip power circuit 13 and ground wire, for being stored when first switch 121 is closed
Electric energy and the electric energy that release stores when first switch 121 disconnects, so that control chip 14 utilizes the electric energy of release first
Switch 121 is kept powered on after disconnecting.
It should be noted that since electrolytic capacitor 16 is connected in parallel between chip power circuit 13 and ground wire, work as first switch
121 charge when being closed for electrolytic capacitor 16, and when first switch 121 disconnects, chip power circuit 13 can not chip 14 in order to control
Power supply, and since electrolytic capacitor 16 is stored with electric energy, chip power circuit 13 can not chip 14 is powered in order to control when, electrolysis electricity
The electric energy of 16 release storage of appearance in order to control power by chip 14, so that a period of time that control chip 14 is disconnected in first switch 121
Inside it is to maintain what is powered on.
Chip 14 is controlled, if can't detect zero for the first zero cross detection circuit, second switch 15 is controlled to disconnect.
It should be noted that if the first zero cross detection circuit can't detect zero, illustrate that first switch 121 disconnects, chip
Power circuit 13 chip 14 can not power in order to control, and due to the electric energy of the release storage of electrolytic capacitor 16, control chip 14 is first
It is powered in one end time after 121 disconnection of switch, control chip 14 can actively control second switch 15 and disconnect.At this
Power switch circuit 12 includes electrolytic capacitor 16 in utility model embodiment, and certainly, power switch circuit 12 can not also include
Electrolytic capacitor 16.If power switch circuit 12 does not include electrolytic capacitor 16, when first switch 121 disconnects, chip power electricity
Road 13 chip 14 can not power in order to control, and also without electrolytic capacitor 16, chip 14 is powered in order to control, and control chip 14 will power off,
Second switch 15 can not be controlled when control chip 14 powers off time control coremaking piece 14, second switch 15 will disconnect automatically.
Optionally, the capacity of electrolytic capacitor 16 is greater than or equal to 47uf.
Optionally, the control circuit 1 of food processor can also include：Second zero cross detection circuit (does not mark) in Fig. 2.
Second zero cross detection circuit, for detecting the zero of voltage on the firewire of alternating current.
Chip 14 is controlled, for after the first zero cross detection circuit can't detect zero, if the second zero cross detection circuit
It detects first zero, then second switch 15 is controlled to disconnect.
In the utility model embodiment, power switch circuit 12 further includes 16 and first zero passage detection of electrolytic capacitor electricity
Road, can be with when the first zero cross detection circuit can't detect the zero of voltage between first switch 121 and chip power circuit 13
Determine that first switch 121 disconnects, when determining that first switch 121 disconnects, it may be determined that chip power circuit 13 powers off, and chip
Power circuit 13 chip 14 can not power in order to control after powering off, and the electric energy of the release storage of electrolytic capacitor 16, control chip 14 utilizes
The electric energy of release is kept powered on after the disconnection of first switch 121, and control chip 14 utilizes the controlling electric energy second switch 15 discharged
Disconnect, that is to say, that control 14 active control second switch 15 of chip disconnects, avoided the occurrence of after 15 power down of second switch due to
The situation that can not realize that second switch 15 disconnects is sucked in 15 liang of contacts of second switch, so as to ensure that the control of food processor electricity
The reliability on road 1.
In the utility model embodiment, the capacity of electrolytic capacitor 16 is greater than or equal to 47uf, such 16 energy of electrolytic capacitor
Enough electric energy are enough stored, when first switch 121 disconnects, since the release of electrolytic capacitor 16 there are enough electric energy so that control
Chip 14 has time enough to be to maintain what is powered on after the disconnection of first switch 121, and control chip 14 just has sufficient time to
Control second switch 15 disconnects.
In the utility model embodiment, second switch 15 controls load circuit 11 to work, when load circuit 11 works,
Load circuit 11 connects firewire, if second switch 15 is disconnected when the voltage on firewire is bigger, due in load circuit 11
The capacitives such as capacitance, inductance and the effect that generates of perceptual component, bigger rush can be generated in the circuit of load circuit 11
Electric current is hit, dash current can have an impact 15 liang of contacts of second switch.Therefore second is controlled in the zero of voltage on firewire
Switch 15 disconnects, and the dash current in load circuit 11 is just smaller in this way, reduces dash current to 15 liang of second switch
The influence of contact.In addition to detected in the second zero cross detection circuit first zero when control second switch 15 disconnect, may be used also
With in the both ends parallel connection varistor 122 of second switch 15, at the both ends of second switch 15, the varistor 122 of parallel connection is for releasing
Put the dash current generated between release 15 liang of terminal contacts of second switch.
Example IV
The embodiment is on the basis of embodiment one, as shown in figure 3, first switch 121 can be located at load circuit 11
Input terminal and alternating current firewire between.
Optionally, the input terminal of load circuit 11 and output terminal are respectively connected to the firewire and zero curve of alternating current, first switch
121 are located between the input terminal of load circuit 11 and the firewire of alternating current.
It should be noted that the embodiment and embodiment are second is that two embodiments arranged side by side, the embodiment and embodiment two
Difference lies in the embodiment is located at first switch 121 in the circuit of load circuit 11, and embodiment is second is that first is opened
121 are closed to be located in the circuit of chip power circuit 13.L in Fig. 3 represents firewire, and N represents zero curve.
In the utility model embodiment, first switch 121 can also be located at the input terminal and alternating current of load circuit 11
Between firewire, when first switch 121 disconnects, load circuit 11 is disconnected with firewire, and load circuit 11 can not work, when
When one switch 121 is closed, load circuit 11 is connected with firewire, and load circuit 11 works, and realizes opening by first switch 121
Break to control whether load circuit 11 connect with firewire.In the utility model embodiment, the realization of control circuit is very simple,
Excessive component is not needed to, the connection between component is also very simple, so that component is on a printed circuit board
Layout is more succinct.
Embodiment five
The embodiment 121 liang of terminal contacts of first switch on the basis of embodiment one to example IV can pass through gold-plated place
Reason.
In the utility model embodiment, since the material of 121 liang of terminal contacts of first switch is generally silver alloy, work as impact
When electric current passes through first switch 121, corrosion can be formed in 121 liang of terminal contacts of first switch, and then influence the logical of first switch 121
It is disconnected.121 liang of terminal contacts of first switch pass through gold-plated processing, can improve 121 liang of terminal contacts of first switch high-temperature stability and
Corrosion resistance characteristic mitigates the influence of 121 both ends contact arc discharge of first switch, promotes the reliability of first switch 121.
Embodiment six
The model of embodiment varistor 122 on the basis of embodiment one to example IV can be 10D561K.
In the utility model embodiment, food processor is during normal use, and the voltage of alternating current is 220V, electric current
It is usually no more than 10A, it is contemplated that capacitance and inductance generate surge voltage and electric current and influence, and the selection of varistor 122 needs to take into account
Voltage and current is impacted.Select the varistor 122 of model 10D561K, the continuous work of maximum of the varistor 122 of the model
Make voltage up to 350V, maximum limitation voltage and maximum limitation electric current are respectively 930V and 25A, and model 10D561K's is pressure-sensitive
Resistance 122 has the impact of stronger proof voltage and resistance to rush of current, so as to ensure the service life of varistor 122.Simultaneously
The varistor 122 of the model is specification more common on household electrical appliance, cheap.
Embodiment seven
Embodiment first switch 121 on the basis of embodiment one to example IV can be button switch or ship type
Switch.
In the utility model embodiment, first switch 121 is located in food processor for user's operation, using by
Button switch or ship type switch are as first switch 121 so that user's operation first switch 121 is very convenient.First switch 121
Also it is easily installed in food processor, the excessive space of food processor will not be occupied.Button switch or ship type switch
With waterproof effect, since food processor is generally positioned in kitchen, the oil smoke in kitchen is bigger, needs often to food
Processing machine is cleaned, when being cleaned to first switch 121, since first switch 121 has waterproof effect so that water is not
The inside of food processor is easily entered by first switch 121, user is facilitated to clean food processor.
Embodiment eight
The control circuit 1 of embodiment food processor on the basis of embodiment one to example IV can also include：
Power supply indicator, for representing whether load circuit works by the light on and off of power supply indicator.
In the utility model embodiment, power supply indicator can be set, identification food processor convenient for the user to operate is worked as
Preceding power supply status promotes user experience.Power supply indicator can be Light-emitting diode LED (Light Emitting
Diode), LED is controlled to be in the state of bright light when load circuit works, LED is controlled to be in when load circuit does not work and gone out
The state of lamp.
The advantageous effect of the utility model embodiment includes：
1st, the utility model embodiment scheme control load circuit works first switch both ends parallel connection varistor,
First switch turns on and off moment by the dash current generated between varistor release two terminal contacts of first switch, subtracts
The arcing lacked due to dash current and two contact of first switch is caused to generate, so as to which two contact of first switch be avoided to burn
It burns, and then reduces influence of the dash current to two terminal contacts of first switch.
2nd, first switch can be not disposed in the circuit of load circuit by the utility model embodiment scheme, therefore be loaded
The dash current that the capacitives such as capacitance, inductance in circuit and perceptual component generate can't pass through first switch, also would not
First switch is had an impact, reduces the dash current by first switch.Meanwhile control chip also can be in food processor
Second switch is controlled to disconnect powering off load circuit during in standby mode, reduces the stand-by power consumption of food processor, it is real
Energy-efficient effect is showed.
3rd, the utility model embodiment scheme has avoided the occurrence of second by the way that chip active control second switch is controlled to disconnect
Since the situation that can not realize that second switch disconnects is sucked in two contact of second switch after switch power down, so as to ensure that food processing
The reliability of the control circuit of machine.
4th, the capacity of the utility model embodiment scheme electrolytic capacitor is greater than or equal to 47uf, and such electrolytic capacitor can be deposited
Enough electric energy are stored up, when first switch disconnects, since electrolytic capacitor release there are enough electric energy, control chip just has enough
Time controls second switch to disconnect.
5th, the utility model embodiment scheme controls second switch to disconnect in the zero of voltage on firewire, that is to say, that
On firewire during voltage minimum control second switch disconnect, the dash current in this way in load circuit is just smaller, reduce by
In influence of the dash current to two contact of second switch.
6th, first switch can also be located at the input terminal of load circuit and the fire of alternating current in the utility model embodiment scheme
Between line, with by first switch cut-off control whether load circuit connect with firewire, the control circuit of food processor
Realization it is very simple, do not need to excessive component so that the layout of component on a printed circuit board is simpler.
7th, the utility model embodiment scheme can improve first switch by two terminal contacts of first switch by gold-plated processing
The high-temperature stability and corrosion resistance characteristic of two terminal contacts even if dash current passes through first switch, can mitigate first switch two
The arcing that terminal contacts generate promotes the reliability of first switch.
8th, the varistor of the utility model embodiment Scheme Choice model 10D561K, the varistor of the model, most
For big continuous operating voltage up to 350V, maximum limitation voltage and maximum limitation electric current are respectively 930V and 25A, are had stronger
Proof voltage impacts and resistance to rush of current, it is ensured that the service life of varistor.The varistor of the model is household simultaneously
More common specification, cheap on electric appliance.
Although the embodiment disclosed by the utility model is as above, the content only the utility model for ease of understanding
And the embodiment used, it is not limited to the utility model.Technical staff in any the utility model fields,
Under the premise of not departing from the spirit and scope disclosed by the utility model, it can be carried out in the form and details of implementation any
Modification and variation, but the scope of patent protection of the utility model, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of control circuit of food processor, including load circuit and power switch circuit, the power switch circuit packet
It includes：For controlling the first switch of the load circuit works, which is characterized in that the power switch circuit further includes：
Varistor is connected in parallel on the both ends of the first switch, for turning on and off abrupt release institute in the first switch
State the dash current generated between two terminal contacts of first switch.
2. control circuit according to claim 1, which is characterized in that further include：Chip power circuit, control chip and the
Two switches；Wherein,
The chip power circuit, input terminal, the first output terminal and second output terminal are respectively connected to the firewire, described of alternating current
The input terminal of the zero curve of alternating current and the control chip, the first switch are located at input terminal and the institute of the chip power circuit
Between the firewire for stating alternating current, the chip power circuit is used for the alternating voltage of the alternating current when the first switch is closed
DC voltage is converted into, and it is the control chip power supply to pass through the DC voltage being converted into；
The control chip, output terminal are connected to the first input end of the second switch, and the control chip is used to control
The opening and closing of the second switch；
The second switch, the second input terminal and output terminal are respectively connected to the firewire of the alternating current and the load circuit
Input terminal, the second switch are used to control the load circuit works by the opening and closing of itself.
3. control circuit according to claim 2, which is characterized in that further include：Electrolytic capacitor and the first zero passage detection electricity
Road；Wherein,
First zero cross detection circuit, for detecting zero of voltage between the first switch and the chip power circuit
Point；
The electrolytic capacitor is connected in parallel between the chip power circuit and ground wire, for being deposited when the first switch is closed
Storing up electricity energy and the electric energy that release stores when the first switch disconnects, so that electric energy of the control chip using release
It is kept powered on after first switch disconnection；
The control chip if can't detect zero for first zero cross detection circuit, controls the second switch to break
It opens.
4. control circuit according to claim 3, which is characterized in that the capacity of the electrolytic capacitor is greater than or equal to
47uf。
5. control circuit according to claim 3, which is characterized in that further include：Second zero cross detection circuit；
Second zero cross detection circuit, for detecting the zero of voltage on the firewire of the alternating current；
The control chip, for after first zero cross detection circuit can't detect zero, if second zero passage is examined
Slowdown monitoring circuit detects first zero, then the second switch is controlled to disconnect.
6. control circuit according to claim 1, which is characterized in that input terminal and the output terminal difference of the load circuit
Be connected to the firewire and zero curve of alternating current, the first switch be located at the load circuit input terminal and the alternating current firewire it
Between.
7. control circuit according to any one of claim 1 to 6, which is characterized in that two terminal contacts of first switch
By gold-plated processing.
8. control circuit according to any one of claim 1 to 6, which is characterized in that the model of the varistor
10D561K。
9. control circuit according to any one of claim 1 to 6, which is characterized in that the first switch is opened for button
It closes or ship type switchs.
10. control circuit according to any one of claim 1 to 6, which is characterized in that further include：
Power supply indicator, for representing whether the load circuit works by the light on and off of the power supply indicator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721568818.9U CN207518562U (en) | 2017-11-22 | 2017-11-22 | A kind of control circuit of food processor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721568818.9U CN207518562U (en) | 2017-11-22 | 2017-11-22 | A kind of control circuit of food processor |
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| CN207518562U true CN207518562U (en) | 2018-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002383A (en) * | 2021-10-26 | 2022-02-01 | 河南驰诚电气股份有限公司 | Acousto-optic integrated independent wireless gas detector system |
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2017
- 2017-11-22 CN CN201721568818.9U patent/CN207518562U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002383A (en) * | 2021-10-26 | 2022-02-01 | 河南驰诚电气股份有限公司 | Acousto-optic integrated independent wireless gas detector system |
| CN114002383B (en) * | 2021-10-26 | 2022-05-20 | 河南驰诚电气股份有限公司 | Integrated control switch for controlling electromagnetic valve linked with gas detector |
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Effective date of registration: 20230607 Address after: Building 2, No. 52, 22nd Street, Baiyang Street, Qiantang New District, Hangzhou City, Zhejiang Province, 310000 Patentee after: Hangzhou Jiuchuang Home Appliances Co.,Ltd. Address before: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee before: JOYOUNG Co.,Ltd. |