CN208950940U - Fan starting circuit and electrical equipment - Google Patents
Fan starting circuit and electrical equipment Download PDFInfo
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- CN208950940U CN208950940U CN201821145708.6U CN201821145708U CN208950940U CN 208950940 U CN208950940 U CN 208950940U CN 201821145708 U CN201821145708 U CN 201821145708U CN 208950940 U CN208950940 U CN 208950940U
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Abstract
This application involves a kind of fan starting circuit and electrical equipments.The circuit includes: first resistor, second resistance, switching tube and 3rd resistor；In first resistor and second resistance there are one be thermistor；The first end of first resistor connects common end power supply；First resistor is connected with second resistance and switching tube respectively；The second end of second resistance is grounded；The second end of switching tube is connected with common end power supply, the third end of switching tube is connected with the first end of fan, for when switching tube is in the conductive state, the second end of switching tube to receive the electric current of common end power supply and is sent to fan, starting fan by the third end of switching tube；The first end of 3rd resistor connects common end power supply, and the second end of 3rd resistor is connected with fan, and when switching tube is in an off state, common end source current is sent to fan by 3rd resistor, starts fan.The problem of being started using foregoing circuit or electrical equipment to avoid fan difficulty under low temperature environment.
Description
Technical field
This application involves circuit fields, more particularly to a kind of fan starting circuit and electrical equipment.
Background technique
With development in science and technology, more and more electrical equipments, especially intelligent electric appliance come into operation.Electrical equipment used
It often may require that fan assists its work in journey.With the increase of the demand of intelligent electric appliance, cause the demand to fan also more next
It is higher.And often there is be difficult to the problem of starting under cryogenic conditions in use for fan.
In the related technology, voltage regulator circuit is mostly used greatly with the concatenated means of controllable accurate source of stable pressure (TL431) circuit to solve
The problem of certainly fan difficulty starts under cryogenic conditions.But the higher cost of TL431 itself, and device is more in TL431 circuit, cloth
Plate takes up space also more, also results in the higher cost of TL431 circuit.
Utility model content
To be overcome the problems, such as present in the relevant technologies at least to a certain extent, the application provides a kind of fan starting circuit
And electrical equipment.
The scheme of the application is as follows:
A kind of fan starting circuit, comprising:
First resistor, second resistance, switching tube and 3rd resistor；Wherein, in the first resistor and the second resistance
It is thermistor there are one；
The first end of the first resistor connects common end power supply；
The second end of the first resistor first end phase with the first end of the second resistance and the switching tube respectively
Connection；
The second end of the second resistance is grounded；
The second end of the switching tube is connected with common end power supply, the third end of the switching tube and the first end of fan
It is connected, the switching tube is connected in current signal for transmitting in first resistor under the action of, at the switching tube
When on state, the second end of the switching tube receives the electric current of common end power supply and is passed by the third end of the switching tube
It send to the fan, starts the fan；
The first end of the 3rd resistor connects common end power supply, and the of the second end of the 3rd resistor and the fan
One end is connected, for when the switching tube is in an off state, common end source current to be transmitted by the 3rd resistor
To the fan, start the fan.
Optionally, the first resistor is thermistor；Alternatively, the second resistance is thermistor.
Optionally, further includes:
The first end of pressure control module, the pressure control module is connected with the second end of the first resistor, the pressure control mould
The second end of block is connected with the first end of the switching tube, for making the second end of the first resistor and the switching tube
Pressure drop is generated between first end.
Optionally, further includes:
The anode of first diode, the first diode is connected with the second end of fan, the first diode
Cathode is connected with the first end of fan, for protecting the fan under off-position.
Optionally, the pressure control module are as follows: the of diode group, the first end of the diode group and the first resistor
Two ends are connected, and the second end of the diode group is connected with the first end of the switching tube.
Optionally, the pressure control module is voltage-stabiliser tube, the second end phase of the cathode of the voltage-stabiliser tube and the first resistor
The anode of connection, the voltage-stabiliser tube is connected with the first end of the switching tube.
Optionally, the diode group includes the diode for setting number, positive series connection between each diode.
Optionally, the diode group, comprising:
Second diode, third diode, the 4th diode；The anode of second diode and the first resistor
Second end is connected, for receiving the electric current of the first resistor end transmission；The cathode of second diode and the third
The anode of diode is connected, and the cathode of the third diode is connected with the anode of the 4th diode, and the described 4th
The cathode of diode is connected with the first end of the switching tube.
Optionally, the switching tube are as follows:
NPN type triode；The base stage of the NPN type triode is the first end of the switching tube, the NPN type triode
The extremely described switching tube of current collection second end, the third end of the extremely described switching tube of transmitting of the NPN type triode；
The base stage of the NPN type triode is connected with the second end of the first resistor, the collection of the NPN type triode
Electrode is connected with common end power supply, and the emitter of the NPN type triode is connected with the first end of the fan.
Optionally, the switching tube are as follows:
PNP type triode；The base stage of the PNP type triode is the first end of the switching tube, the PNP type triode
The extremely described switching tube of transmitting second end, the third end of the extremely described switching tube of the current collection of the PNP type triode；
The base stage of the PNP type triode is connected with the second end of the first resistor, the hair of the PNP type triode
Emitter-base bandgap grading is connected with common end power supply, and the collector of the PNP type triode is connected with the first end of the fan.
Optionally, the switching tube are as follows:
Metal-oxide-semiconductor；The grid of the metal-oxide-semiconductor is the first end of the switching tube, and the drain electrode of the metal-oxide-semiconductor is the switching tube
Second end, the source electrode of the metal-oxide-semiconductor is the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the first resistor, the drain electrode of the metal-oxide-semiconductor and common end electricity
Source is connected, and the source electrode of the metal-oxide-semiconductor is connected with the first end of the fan.
A kind of fan starting circuit, comprising:
First resistor, second resistance, switching tube and 3rd resistor；
The first end of the first resistor connects common end power supply；
The second end of the first resistor first end phase with the first end of the second resistance and the switching tube respectively
Connection；
The second end of the second resistance is grounded；
The second end of the switching tube is connected with the second end of fan, and the third end ground connection of the switching tube is used for
The switching tube is connected under the action of the current signal of the first resistor transmission, when the switching tube is in the conductive state,
The second end of the switching tube receives the electric current of fan transmission and is grounded by the third end of the switching tube, starts the wind
Fan；
The first end of the 3rd resistor is connected with the second end of the fan, the second termination of the 3rd resistor
Ground, for when the switching tube is in an off state, then common end source current to connect through passing through fan, the 3rd resistor
Ground starts the fan；
The first end of the fan is connected with common end power supply.
Optionally, further includes:
The first end of pressure control module, the pressure control module is connected with the second end of the first resistor, the pressure control mould
The second end of block is connected with the first end of the switching tube, for making the second end of the first resistor and the switching tube
Pressure drop is generated between first end.
Optionally, further includes:
The anode of first diode, the first diode is connected with the second end of fan, the first diode
Cathode is connected with the first end of fan, for protecting the fan under off-position.
Optionally, the pressure control module are as follows: the of diode group, the first end of the diode group and the first resistor
Two ends are connected, and the second end of the diode group is connected with the first end of the switching tube.
Optionally, the pressure control module is voltage-stabiliser tube, the second end phase of the cathode of the voltage-stabiliser tube and the first resistor
The anode of connection, the voltage-stabiliser tube is connected with the first end of the switching tube.
Optionally, the diode group includes the diode for setting number, positive series connection between each diode.
Optionally, the switching tube are as follows:
NPN type triode；The base stage of the NPN type triode is the first end of the switching tube, the NPN type triode
The extremely described switching tube of current collection second end, the third end of the extremely described switching tube of transmitting of the NPN type triode；
The base stage of the NPN type triode is connected with the second end of the first resistor, the collection of the NPN type triode
Electrode is connected with the second end of fan, the emitter ground connection of the NPN type triode.
Optionally, the switching tube are as follows:
PNP type triode；The base stage of the PNP type triode is the first end of the switching tube, the PNP type triode
The extremely described switching tube of transmitting second end, the third end of the extremely described switching tube of the current collection of the PNP type triode；
The base stage of the PNP type triode is connected with the second end of the first resistor, the hair of the PNP type triode
Emitter-base bandgap grading is connected with the second end of fan, the grounded collector of the PNP type triode.
Optionally, the switching tube are as follows:
Metal-oxide-semiconductor；The grid of the metal-oxide-semiconductor is the first end of the switching tube, and the drain electrode of the metal-oxide-semiconductor is the switching tube
Second end, the source electrode of the metal-oxide-semiconductor is the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the first resistor, and the of the drain electrode of the metal-oxide-semiconductor and fan
Two ends are connected, the source electrode ground connection of the metal-oxide-semiconductor.
A kind of electrical equipment, including fan, the fan starting circuit as described above being electrically connected with the fan.
Technical solution provided by the present application can include the following benefits:
Disclosed herein a kind of fan starting circuit and electrical equipment, the circuit include: first resistor, the second electricity
Resistance, switching tube, 3rd resistor；It wherein, is thermistor there are one in the first resistor and the second resistance；First electricity
The first end of resistance connects common end power supply, for receiving the current signal of common end power supply；The second end of first resistor respectively with
The first end of second resistance is connected with the first end of switching tube, for the variation with environment temperature, different resistances is presented
Value；The second end of second resistance is grounded, the voltage that the both ends for controlling first resistor are got；The second end of switching tube with it is public
End power supply is connected, and the third end of switching tube is connected with the first end of fan, the current signal for transmitting in first resistor
Under the action of the switching tube is connected, when switching tube is in the conductive state, the second end of switching tube receives common end power supply
Electric current is simultaneously sent to fan by the third end of switching tube, starts fan；The first end of 3rd resistor connects common end power supply, the
The second end of three resistance is connected with the first end of fan, for when switching tube is in an off state, common end source current
It is sent to fan by 3rd resistor, starts fan.Resistance value in the application by first resistor, which varies with temperature, to be changed
Attribute can control the partial pressure of second resistance, and then control the unlatching of fan.When first resistor is thermistor, with ring
Border temperature increases, and first resistor resistance value becomes smaller, and the partial pressure of first resistor becomes smaller, and causes the partial pressure of second resistance to become larger, opens at this time
Closing the received electric current of pipe first end can be such that switching tube is closed, and switching tube is connected to fan at this time, open fan.Work as environment temperature
When lower, the resistance value of first resistor becomes larger, and the voltage at first resistor both ends becomes larger, and the voltage at second resistance both ends is caused to become smaller,
The electric current of the first end of switching tube is insufficient to allow switching tube to be connected at this time, and common end power circuit then passes through 3rd resistor stream at this time
Enter fan, fan is opened with this, realizes the effect for opening fan under low temperature environment.Similarly, when second resistance is thermistor
When, thermistor resistance value becomes larger as temperature increases, the change in resistance of thermistor, leads to the variation of partial pressure, and then realize
The function of fan is opened under low temperature environment.Fan is connected with 3rd resistor in the application, while 3rd resistor paralleling switch pipe,
Can realize the unlatching of fan at low ambient temperatures simply by a resistance, greatly reduce fan starting circuit at
This, reduces expenses.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is a kind of structural schematic diagram of fan starting circuit shown according to an exemplary embodiment；
Fig. 2 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment；
Fig. 3 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment；
Fig. 4 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment；
Fig. 5 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device of some aspects be described in detail in claims, the application.
Fig. 1 is a kind of structural schematic diagram of fan starting circuit shown according to an exemplary embodiment.Referring to Fig. 1, one
Kind fan starting circuit, comprising:
First resistor 101, second resistance 102, switching tube 103 and 3rd resistor 104；Wherein, the first resistor and institute
State in second resistance there are one be thermistor；
The first end of the first resistor 101 connects common end power supply, for receiving the current signal of common end power supply；
The second end of the first resistor 101 respectively with the first end of the second resistance 102 and the switching tube 103
First end is connected, for the variation with environment temperature, different resistance values is presented；
The second end of the second resistance 102 is grounded, the voltage that the both ends for controlling the first resistor 101 are got；
The second end of the switching tube 103 is connected with common end power supply, the third end of the switching tube 103 and fan
105 first end is connected, and the switching tube is connected in current signal for transmitting in the first resistor 101 under the action of,
When the switching tube is in the conductive state, the second end of the switching tube receives the electric current of common end power supply and is opened by described
The third end for closing pipe is sent to the fan 105, starts the fan 105；
The first end of the 3rd resistor 104 connects common end power supply, the second end of the 3rd resistor 104 and the wind
The first end of fan 105 is connected, for when the switching tube is in an off state, common end source current to pass through the third
Resistance is sent to the fan 105, starts the fan 105.
It wherein, is thermistor there are one in first resistor 101 and second resistance 102.
It should be noted that when first resistor is thermistor, thermistor resistance value becomes larger with temperature and is become smaller, when the
When two resistance are thermistor, thermistor resistance value becomes larger with temperature and is become larger.
When first resistor 101 is thermistor, when environment temperature is high, thermistor resistance value is small, point of thermistor
Press then small, switching tube conducting, and then starting fan at this time；When ambient temperatures are low, thermistor resistance value is big, and partial pressure also becomes larger,
Switching tube cannot then be connected at this time, and common end source current is then sent to fan by 3rd resistor, be started at low temperature with this
Fan.
When second resistance is thermistor, when environment temperature is high, the resistance value of thermistor becomes larger, thermistor partial pressure
It also becomes larger, switching tube can be connected at this time, and then can star fan；When ambient temperatures are low, thermistor resistance value becomes smaller, and opens
Closing pipe can not be connected, at this point, common end source current is then sent to fan by 3rd resistor, start wind at low temperature with this
Fan.
Switching tube can be with are as follows: NPN type triode or metal-oxide-semiconductor；
When switching tube is NPN type triode, the base stage of NPN type triode is the first end of the switching tube, the NPN
The second end of the extremely described switching tube of the current collection of type triode, the of the extremely described switching tube of transmitting of the NPN type triode
Three ends；
The base stage of the NPN type triode is connected with the second end of the first resistor, the collection of the NPN type triode
Electrode is connected with common end power supply, and the emitter of the NPN type triode is connected with the first end of the fan.
When switching tube is PNP type triode, the base stage of the PNP type triode is the first end of the switching tube, institute
State the second end of the extremely described switching tube of transmitting of PNP type triode, the extremely described switching tube of the current collection of the PNP type triode
Third end；
The base stage of the PNP type triode is connected with the second end of the pressure control module 303, the PNP type triode
Emitter be connected with common end power supply, the collector of the PNP type triode is connected with the first end of the fan 306
It connects.
When switching tube is metal-oxide-semiconductor, the grid of the metal-oxide-semiconductor is the first end of the switching tube, the drain electrode of the metal-oxide-semiconductor
For the second end of the switching tube, the source electrode of the metal-oxide-semiconductor is the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the first resistor, the drain electrode of the metal-oxide-semiconductor and common end electricity
Source is connected, and the source electrode of the metal-oxide-semiconductor is connected with the first end of the fan.
Said fans start-up circuit varies with temperature the attribute changed by the resistance value of first resistor, can control second
The partial pressure of resistance, and then control the unlatching of fan.When environment temperature is high, first resistor resistance value becomes smaller, the partial pressure of first resistor
Become smaller, the partial pressure of second resistance is caused to become larger, the received electric current of switching tube first end can be such that switching tube is closed at this time, open at this time
The connection of Guan Guanyu fan, opens fan.When the temperature of the surroundings is low, the resistance value of first resistor becomes larger, the electricity at first resistor both ends
Buckling is big, and the voltage at second resistance both ends is caused to become smaller, and the electric current of the first end of switching tube is insufficient to allow switching tube to be connected at this time,
Common end power circuit then passes through 3rd resistor inflow fan at this time, opens fan with this, realizes and open wind under low temperature environment
The effect of fan.
The introduction of fan starting circuit is now carried out using first resistor as thermistor:
Fig. 2 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment；Referring to fig. 2,
A kind of fan starting circuit, comprising:
Thermistor 201, second resistance 202, pressure control module 203, switching tube 204,3rd resistor 205, first diode
207；
The first end of the thermistor 201 connects common end power supply, for receiving the current signal of common end power supply；
The second end of the thermistor 201 respectively with the first end of the second resistance 202 and the pressure control module 203
First end be connected, for the variation with environment temperature, different resistance values is presented, when environment temperature is very low, temperature-sensitive
The resistance value of resistance becomes larger, and when environment temperature is very high, the resistance value of thermistor becomes smaller.
The second end of the second resistance 202 is grounded, the voltage that the both ends for controlling the thermistor 201 are got；
When the temperature of the surroundings is low, the resistance value of thermistor becomes larger, and the voltage that thermistor both ends are got at this time is then larger, when environment temperature
When spending higher, the voltage that thermistor both ends are got is then smaller.
The second end of the pressure control module 203 is connected with the first end of the switching tube 204, for making the temperature-sensitive electricity
Pressure drop is generated between the second end of resistance 201 and the first end of the switching tube 204.
The second end of the switching tube 204 is connected with common end power supply, the third end of the switching tube 204 and fan
206 first end is connected, and the switching tube is connected in current signal for transmitting in the pressure control module 203 under the action of
204, when the switching tube 204 is in the conductive state, the second end of the switching tube 204 receives the electric current of common end power supply simultaneously
It is sent to the fan 206 by the third end of the switching tube 204, starts the fan 206；
Now be illustrated so that switching tube 204 is NPN type triode as an example: the base stage of NPN type triode is the switching tube
First end, the second end of the extremely described switching tube of the current collection of the NPN type triode, the emitter of the NPN type triode
For the third end of the switching tube；
The base stage of the NPN type triode is connected with the second end of the thermistor, the collection of the NPN type triode
Electrode is connected with common end power supply, and the emitter of the NPN type triode is connected with the first end of the fan.
The first end of the 3rd resistor 205 connects common end power supply, the second end of the 3rd resistor 205 and the wind
The first end of fan 206 is connected, for when the switching tube 204 is in an off state, the electric current of common end power supply to pass through institute
It states 3rd resistor 205 and is sent to the fan, start the fan 206.
The anode of the first diode 207 is connected with the second end of fan 206, and the first diode 207 is born
Pole is connected with the first end of fan 206, for protecting the fan 206 under off-position.
Wherein, the pressure control module 203 can be with are as follows: diode group either voltage-stabiliser tube.When for diode group, diode
The first end of group is connected with the second end of the thermistor 201, the second end of the diode group and the switching tube 204
First end be connected.
When pressure control module 203 is voltage-stabiliser tube, the cathode of voltage-stabiliser tube is connected with the second end of the thermistor 201,
The anode of the voltage-stabiliser tube is connected with the first end of the switching tube 204.
Wherein, diode group includes the diode for setting number, positive series connection between each diode.Now with 3
For a diode constitutes diode group, it is introduced:
Diode group includes: the second diode, third diode, the 4th diode；Second diode anode with
The second end of the thermistor is connected, for receiving the electric current of the thermistor end transmission；Second diode
Cathode is connected with the anode of the third diode, the positive phase of the cathode of the third diode and the 4th diode
Connection, the cathode of the 4th diode are connected with the first end of the switching tube.
Said fans start-up circuit connects fan with 3rd resistor, while 3rd resistor is in parallel with triode, works as environment
When temperature is lower, triode is not turned on, and then reduces voltage when starting fan, voltage decline using 3rd resistor partial pressure at this time
It will lead to the startup power decline of fan, and then start fan.When environment temperature is higher, thermistor partial pressure is smaller, this
When triode ON, 3rd resistor is then short-circuited, and fan is normally-open at this time.Foregoing circuit can guarantee wind at low ambient temperatures
Fan still can be opened.On this basis, pressure control module and first diode be also added in foregoing circuit, wherein passing through pressure control
Module can make to generate pressure drop between the second end of the thermistor and the first end of the switching tube, and first diode can protect
The fan under off-position is protected, therefore foregoing circuit is gone back on the basis of fan difficulty under solving the problems, such as low temperature environment starts
The protection to fan starting circuit is realized, the precision and safety of fan starting circuit are improved.
It is now that thermistor describes to fan starting circuit in detail using switching tube as PNP type triode, first resistor:
Fig. 3 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment.Referring to Fig. 3, a kind of fan
Start-up circuit, comprising:
Thermistor 301, second resistance 302, pressure control module 303, switching tube 304,3rd resistor 305, first diode
307；
The first end of the thermistor 301 connects common end power supply, for receiving the current signal of common end power supply；
The second end of the thermistor 301 respectively with the first end of the second resistance 302 and the pressure control module 303
First end be connected, for the variation with environment temperature, different resistance values is presented, when environment temperature is very low, temperature-sensitive
The resistance value of resistance becomes larger, and when environment temperature is very high, the resistance value of thermistor becomes smaller.
The second end of the second resistance 302 is grounded, the voltage that the both ends for controlling the thermistor 301 are got；
When the temperature of the surroundings is low, the resistance value of thermistor becomes larger, and the voltage that thermistor both ends are got at this time is then larger, when environment temperature
When spending higher, the voltage that thermistor both ends are got is then smaller.
The second end of the pressure control module 303 is connected with the first end of the switching tube 304, for making the temperature-sensitive electricity
Pressure drop is generated between the second end of resistance 301 and the first end of the switching tube 304.
The second end of the switching tube 304 is connected with common end power supply, the third end of the switching tube 304 and fan
306 first end is connected, and the switching tube is connected in current signal for transmitting in the pressure control module 303 under the action of
304, when the switching tube 304 is in the conductive state, the second end of the switching tube 304 receives the electric current of common end power supply simultaneously
It is sent to the fan 206 by the third end of the switching tube 304, starts the fan 306；
Now be illustrated so that switching tube 304 is PNP type triode as an example: the base stage of the PNP type triode is described opens
Close the first end of pipe, the second end of the extremely described switching tube of transmitting of the PNP type triode, the collection of the PNP type triode
Electrode is the third end of the switching tube；
The base stage of the PNP type triode is connected with the second end of the pressure control module 303, the PNP type triode
Emitter be connected with common end power supply, the collector of the PNP type triode is connected with the first end of the fan 306
It connects.
The first end of the 3rd resistor 305 connects common end power supply, the second end of the 3rd resistor 305 and the wind
The first end of fan 306 is connected, for when the PNP type triode is in an off state, the electric current of common end power supply to pass through
The 3rd resistor 305 is sent to the fan, starts the fan 306.
The anode of the first diode 307 is connected with the second end of fan 306, and the first diode 307 is born
Pole is connected with the first end of fan 306, for protecting the fan 306 under off-position.
Wherein, the pressure control module 303 can be with are as follows: diode group either voltage-stabiliser tube.When for diode group, diode
The first end of group is connected with the second end of the thermistor 301, the second end of the diode group and PNP type triode
First end is connected.
When pressure control module 303 is voltage-stabiliser tube, the cathode of voltage-stabiliser tube is connected with the second end of the thermistor 301,
The anode of the voltage-stabiliser tube is connected with the first end of PNP type triode.
Wherein, diode group includes the diode for setting number, positive series connection between each diode.Now with 3
For a diode constitutes diode group, it is introduced:
Diode group includes: the second diode, third diode, the 4th diode；Second diode anode with
The second end of the thermistor is connected, for receiving the electric current of the thermistor end transmission；Second diode
Cathode is connected with the anode of the third diode, the positive phase of the cathode of the third diode and the 4th diode
Connection, the cathode of the 4th diode are connected with the base stage of PNP type triode.
Said fans start-up circuit connects fan with 3rd resistor, while 3rd resistor is in parallel with triode, works as environment
When temperature is lower, triode is not turned on, and then reduces voltage when starting fan, voltage decline using 3rd resistor partial pressure at this time
It will lead to the startup power decline of fan, and then start fan.When environment temperature is higher, thermistor partial pressure is smaller, this
When triode ON, 3rd resistor is then short-circuited, and fan is normally-open at this time.Foregoing circuit can guarantee wind at low ambient temperatures
Fan still can be opened.On this basis, pressure control module and first diode be also added in foregoing circuit, wherein passing through pressure control
Module can make to generate pressure drop between the second end of the thermistor and the first end of the switching tube, and first diode can protect
The fan under off-position is protected, therefore foregoing circuit is gone back on the basis of fan difficulty under solving the problems, such as low temperature environment starts
The protection to fan starting circuit is realized, the precision and safety of fan starting circuit are improved.
Wherein, the switching tube can be with are as follows: metal-oxide-semiconductor；The grid of the metal-oxide-semiconductor is the first end of the switching tube, institute
The drain electrode for stating metal-oxide-semiconductor is the second end of the switching tube, and the source electrode of the metal-oxide-semiconductor is the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the thermistor, the drain electrode of the metal-oxide-semiconductor and common end electricity
Source is connected, and the source electrode of the metal-oxide-semiconductor is connected with the first end of the fan.
Fig. 4 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment.Referring to fig. 4,
A kind of fan starting circuit, comprising:
First resistor 401, second resistance 402, switching tube 403 and 3rd resistor 404；Wherein, the first resistor and institute
State in second resistance there are one be thermistor；
The first end of the first resistor 401 connects common end power supply；
The second end of the first resistor 401 respectively with the first end of the second resistance 402 and the switching tube 403
First end is connected；
The second end of the second resistance 402 is grounded；
The second end of the switching tube 403 is connected with the second end of fan 405, the third termination of the switching tube 403
The switching tube 403 is connected in ground, current signal for transmitting in the first resistor 401 under the action of, when the switching tube
403 it is in the conductive state when, the second end of the switching tube 403 receives the electric current that fan 405 transmits and simultaneously passes through the switching tube
403 third end ground connection, starts the fan 405；
The first end of the 3rd resistor 404 is connected with the second end of the fan 405, the 3rd resistor 404
Second end ground connection, for when the switching tube 403 is in an off state, common end source current is through passing through fan 405, described the
Three resistance 404 ground connection, starts the fan 405；
The first end of the fan 405 is connected with common end power supply.
Wherein, the switching tube can be with are as follows: NPN type triode or PNP type triode or metal-oxide-semiconductor；
When switching tube is NPN type triode, the base stage of NPN type triode is the first end of the switching tube, the NPN
The second end of the extremely described switching tube of the current collection of type triode, the of the extremely described switching tube of transmitting of the NPN type triode
Three ends；
The base stage of the NPN type triode is connected with the second end of the first resistor, the collection of the NPN type triode
Electrode is connected with the second end of fan, the emitter ground connection of the NPN type triode.
When the switching tube is PNP type triode, the base stage of the PNP type triode is the first end of the switching tube,
The second end of the extremely described switching tube of transmitting of the PNP type triode, the extremely described switch of the current collection of the PNP type triode
The third end of pipe；
The base stage of the PNP type triode is connected with the second end of the first resistor, the hair of the PNP type triode
Emitter-base bandgap grading is connected with the second end of fan, the grounded collector of the PNP type triode.
When the switching tube is metal-oxide-semiconductor；The grid of the metal-oxide-semiconductor is the first end of the switching tube, the leakage of the metal-oxide-semiconductor
The second end of the extremely described switching tube, the source electrode of the metal-oxide-semiconductor are the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the first resistor, and the of the drain electrode of the metal-oxide-semiconductor and fan
Two ends are connected, the source electrode ground connection of the metal-oxide-semiconductor.
Wherein, first resistor is thermistor；Alternatively, the second resistance is thermistor.
It should be noted that when first resistor is thermistor, thermistor resistance value becomes larger with temperature and is become smaller, when the
When two resistance are thermistor, thermistor resistance value becomes larger with temperature and is become larger.
When first resistor is thermistor, when environment temperature is high, thermistor resistance value is small, and the partial pressure of thermistor is then
Small, switching tube is connected at this time, and then starting fan；When ambient temperatures are low, thermistor resistance value is big, and partial pressure also becomes larger, at this time
Switching tube cannot then be connected, and common end source current forms access by fan, 3rd resistor, start wind at low temperature with this
Fan.
When second resistance is thermistor, when environment temperature is high, the resistance value of thermistor becomes larger, thermistor partial pressure
It also becomes larger, switching tube can be connected at this time, and then can star fan；When ambient temperatures are low, thermistor resistance value becomes smaller, and opens
Closing pipe can not be connected, at this point, common end source current forms access by fan, 3rd resistor, be started at low temperature with this
Fan.
The introduction of fan starting circuit is now carried out using first resistor as thermistor:
Fig. 5 is a kind of structural schematic diagram of the fan starting circuit shown according to another exemplary embodiment.Referring to Fig. 5,
A kind of fan starting circuit, comprising:
Thermistor 501, second resistance 502, pressure control module 503, switching tube 504,3rd resistor 505 and first diode
506；
The first end of the thermistor 501 connects common end power supply；
The second end of the thermistor 501 respectively with the first end of the second resistance 502 and the pressure control module 503
First end be connected；
The second end of the second resistance 502 is grounded；
The second end of the pressure control module 503 is connected with the first end of the switching tube 504, for making the temperature-sensitive electricity
Pressure drop is generated between the second end of resistance 501 and the first end of the switching tube 504；
The second end of the switching tube 504 is connected with the second end of fan 507, the third termination of the switching tube 504
The switching tube 504 is connected in ground, current signal for transmitting in the thermistor 501 under the action of, when the switching tube
504 it is in the conductive state when, the second end of the switching tube 504 receives the electric current that fan 507 transmits and simultaneously passes through the switching tube
504 third end ground connection, starts the fan 507；
Now be introduced so that switching tube is NPN type triode as an example: the base stage of the NPN type triode is the switching tube
First end, the second end of the extremely described switching tube of the current collection of the NPN type triode, the emitter of the NPN type triode
For the third end of the switching tube；
The base stage of the NPN type triode is connected with the second end of the thermistor 501, the NPN type triode
Collector be connected with the second end of fan 507, the emitter of NPN type triode ground connection.
The first end of the 3rd resistor 505 is connected with the second end of the fan 507, the 3rd resistor 505
Second end ground connection, for when the switching tube 504 is in an off state, common end source current is through passing through fan 507, described the
Three resistance 505 ground connection, starts the fan 507；
The first end of the fan 507 is connected with common end power supply；
The first diode 506 anode be connected with the second end of fan, the cathode of the first diode 506 and
The first end of fan is connected, for protecting the fan under off-position.
Wherein, pressure control module can be with are as follows: diode group or voltage-stabiliser tube.When for diode group, the diode group
First end is connected with the second end of the thermistor, the second end and the first end phase of the switching tube of the diode group
Connection.
The pressure control module is voltage-stabiliser tube, and the cathode of the voltage-stabiliser tube is connected with the second end of the thermistor, institute
The anode for stating voltage-stabiliser tube is connected with the first end of the switching tube.
Wherein, diode group includes the diode for setting number, positive series connection between each diode.Now with 3
For a diode constitutes diode group, it is introduced:
Diode group includes: the second diode, third diode, the 4th diode；Second diode anode with
The second end of the thermistor is connected, for receiving the electric current of the thermistor end transmission；Second diode
Cathode is connected with the anode of the third diode, the positive phase of the cathode of the third diode and the 4th diode
Connection, the cathode of the 4th diode are connected with the base stage of NPN type triode.
Said fans start-up circuit connects fan with 3rd resistor, while 3rd resistor is in parallel with triode, works as environment
When temperature is lower, triode is not turned on, and then reduces voltage when starting fan, voltage decline using 3rd resistor partial pressure at this time
It will lead to the startup power decline of fan, and then start fan.When environment temperature is higher, thermistor partial pressure is smaller, this
When triode ON, 3rd resistor is then short-circuited, and fan is normally-open at this time.Foregoing circuit can guarantee wind at low ambient temperatures
Fan still can be opened.On this basis, pressure control module and first diode be also added in foregoing circuit, wherein passing through pressure control
Module can make to generate pressure drop between the second end of the thermistor and the first end of the switching tube, and first diode can protect
The fan under off-position is protected, therefore foregoing circuit is gone back on the basis of fan difficulty under solving the problems, such as low temperature environment starts
The protection to fan starting circuit is realized, the precision and safety of fan starting circuit are improved.
Wherein, the switching tube can be with are as follows: PNP type triode or metal-oxide-semiconductor；
When switching tube is PNP type triode, the base stage of the PNP type triode is the first end of the switching tube, institute
State the second end of the extremely described switching tube of transmitting of PNP type triode, the extremely described switching tube of the current collection of the PNP type triode
Third end；
The base stage of the PNP type triode is connected with the second end of the thermistor, the hair of the PNP type triode
Emitter-base bandgap grading is connected with the second end of fan, the grounded collector of the PNP type triode.
When the switching tube is metal-oxide-semiconductor, the grid of the metal-oxide-semiconductor is the first end of the switching tube, the leakage of the metal-oxide-semiconductor
The second end of the extremely described switching tube, the source electrode of the metal-oxide-semiconductor are the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the thermistor, and the of the drain electrode of the metal-oxide-semiconductor and fan
Two ends are connected, the source electrode ground connection of the metal-oxide-semiconductor.
A kind of electrical equipment, including fan are also protected in the application, are electrically connected with the fan as described above
Fan starting circuit.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example
Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (22)
1. a kind of fan starting circuit characterized by comprising
First resistor, second resistance, switching tube and 3rd resistor；Wherein, exist in the first resistor and the second resistance
One is thermistor；
The first end of the first resistor connects common end power supply；
The second end of the first resistor is connected with the first end of the first end of the second resistance and the switching tube respectively；
The second end of the second resistance is grounded；
The second end of the switching tube is connected with common end power supply, and the third end of the switching tube is connected with the first end of fan
It connects, the switching tube is connected in current signal for transmitting in first resistor under the action of, leads when the switching tube is in
When logical state, the second end of the switching tube receives the electric current of common end power supply and is sent to by the third end of the switching tube
The fan starts the fan；
The first end of the 3rd resistor connects common end power supply, the first end of the second end of the 3rd resistor and the fan
It is connected, for when the switching tube is in an off state, common end source current to be sent to institute by the 3rd resistor
Fan is stated, the fan is started.
2. fan starting circuit according to claim 1, which is characterized in that the first resistor is thermistor；
Alternatively, the second resistance is thermistor.
3. fan starting circuit according to claim 1, which is characterized in that further include:
The first end of pressure control module, the pressure control module is connected with the second end of the first resistor, the pressure control module
Second end is connected with the first end of the switching tube, for making the first of the second end of the first resistor and the switching tube
Pressure drop is generated between end.
4. fan starting circuit according to claim 1, which is characterized in that further include:
The anode of first diode, the first diode is connected with the second end of fan, the cathode of the first diode
It is connected with the first end of fan, for protecting the fan under off-position.
5. fan starting circuit according to claim 3, which is characterized in that the pressure control module are as follows: diode group, it is described
The first end of diode group is connected with the second end of the first resistor, the second end of the diode group and the switching tube
First end be connected.
6. fan starting circuit according to claim 3, which is characterized in that the pressure control module is voltage-stabiliser tube, described steady
The cathode of pressure pipe is connected with the second end of the first resistor, the first end phase of the anode and the switching tube of the voltage-stabiliser tube
Connection.
7. fan starting circuit according to claim 5, which is characterized in that the diode group includes set number two
Pole pipe, it is positive between each diode to be connected in series.
8. fan starting circuit according to claim 7, which is characterized in that the diode group, comprising:
Second diode, third diode, the 4th diode；The anode of second diode and the second of the first resistor
End is connected, for receiving the electric current of the first resistor end transmission；The cathode of second diode and the three or two pole
The anode of pipe is connected, and the cathode of the third diode is connected with the anode of the 4th diode, the four or two pole
The cathode of pipe is connected with the first end of the switching tube.
9. fan starting circuit according to claim 1, which is characterized in that the switching tube are as follows:
NPN type triode；The base stage of the NPN type triode is the first end of the switching tube, the collection of the NPN type triode
Electrode is the second end of the switching tube, the third end of the extremely described switching tube of transmitting of the NPN type triode；
The base stage of the NPN type triode is connected with the second end of the first resistor, the collector of the NPN type triode
It is connected with common end power supply, the emitter of the NPN type triode is connected with the first end of the fan.
10. fan starting circuit according to claim 1, which is characterized in that the switching tube are as follows:
PNP type triode；The base stage of the PNP type triode is the first end of the switching tube, the hair of the PNP type triode
Emitter-base bandgap grading is the second end of the switching tube, the third end of the extremely described switching tube of the current collection of the PNP type triode；
The base stage of the PNP type triode is connected with the second end of the first resistor, the emitter of the PNP type triode
It is connected with common end power supply, the collector of the PNP type triode is connected with the first end of the fan.
11. fan starting circuit according to claim 1, which is characterized in that the switching tube are as follows:
Metal-oxide-semiconductor；The grid of the metal-oxide-semiconductor is the first end of the switching tube, and the drain electrode of the metal-oxide-semiconductor is the of the switching tube
Two ends, the source electrode of the metal-oxide-semiconductor are the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the first resistor, drain electrode and the common end power supply phase of the metal-oxide-semiconductor
Connection, the source electrode of the metal-oxide-semiconductor are connected with the first end of the fan.
12. a kind of fan starting circuit characterized by comprising
First resistor, second resistance, switching tube and 3rd resistor；Wherein, exist in the first resistor and the second resistance
One is thermistor；
The first end of the first resistor connects common end power supply；
The second end of the first resistor is connected with the first end of the first end of the second resistance and the switching tube respectively；
The second end of the second resistance is grounded；
The second end of the switching tube is connected with the second end of fan, the third end ground connection of the switching tube, for described
The switching tube is connected under the action of the current signal of first resistor transmission, it is described when the switching tube is in the conductive state
The second end of switching tube receives the electric current of fan transmission and is grounded by the third end of the switching tube, starts the fan；
The first end of the 3rd resistor is connected with the second end of the fan, and the second end ground connection of the 3rd resistor is used
In when the switching tube is in an off state, then common end source current is grounded through passing through fan, the 3rd resistor, starting
The fan；
The first end of the fan is connected with common end power supply.
13. fan starting circuit according to claim 12, which is characterized in that the first resistor is thermistor；
Alternatively, the second resistance is thermistor.
14. fan starting circuit according to claim 12, which is characterized in that further include:
The first end of pressure control module, the pressure control module is connected with the second end of the first resistor, the pressure control module
Second end is connected with the first end of the switching tube, for making the first of the second end of the first resistor and the switching tube
Pressure drop is generated between end.
15. fan starting circuit according to claim 12, which is characterized in that further include:
The anode of first diode, the first diode is connected with the second end of fan, the cathode of the first diode
It is connected with the first end of fan, for protecting the fan under off-position.
16. fan starting circuit according to claim 14, which is characterized in that the pressure control module are as follows: diode group, institute
The first end for stating diode group is connected with the second end of the first resistor, the second end of the diode group and the switch
The first end of pipe is connected.
17. fan starting circuit according to claim 14, which is characterized in that the pressure control module is voltage-stabiliser tube, described
The cathode of voltage-stabiliser tube is connected with the second end of the first resistor, the first end of the anode and the switching tube of the voltage-stabiliser tube
It is connected.
18. fan starting circuit according to claim 16, which is characterized in that the diode group includes setting number
Diode, it is positive between each diode to be connected in series.
19. fan starting circuit according to claim 12, which is characterized in that the switching tube are as follows:
NPN type triode；The base stage of the NPN type triode is the first end of the switching tube, the NPN type triode
The second end of the extremely described switching tube of current collection, the third end of the extremely described switching tube of transmitting of the NPN type triode；
The base stage of the NPN type triode is connected with the second end of the first resistor, the collector of the NPN type triode
It is connected with the second end of fan, the emitter ground connection of the NPN type triode.
20. fan starting circuit according to claim 12, which is characterized in that the switching tube are as follows:
PNP type triode；The base stage of the PNP type triode is the first end of the switching tube, the hair of the PNP type triode
Emitter-base bandgap grading is the second end of the switching tube, the third end of the extremely described switching tube of the current collection of the PNP type triode；
The base stage of the PNP type triode is connected with the second end of the first resistor, the emitter of the PNP type triode
It is connected with the second end of fan, the grounded collector of the PNP type triode.
21. fan starting circuit according to claim 12, which is characterized in that the switching tube are as follows:
Metal-oxide-semiconductor；The grid of the metal-oxide-semiconductor is the first end of the switching tube, and the drain electrode of the metal-oxide-semiconductor is the of the switching tube
Two ends, the source electrode of the metal-oxide-semiconductor are the third end of the switching tube；
The grid of the metal-oxide-semiconductor is connected with the second end of the first resistor, the drain electrode of the metal-oxide-semiconductor and the second end of fan
It is connected, the source electrode ground connection of the metal-oxide-semiconductor.
22. a kind of electrical equipment, which is characterized in that including fan, be electrically connected with the fan as claim 1~21 is any
Fan starting circuit described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821145708.6U CN208950940U (en) | 2018-07-19 | 2018-07-19 | Fan starting circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821145708.6U CN208950940U (en) | 2018-07-19 | 2018-07-19 | Fan starting circuit and electrical equipment |
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| Publication Number | Publication Date |
|---|---|
| CN208950940U true CN208950940U (en) | 2019-06-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757540A (en) * | 2018-07-19 | 2018-11-06 | 珠海格力电器股份有限公司 | Fan starting circuit and electrical equipment |
| CN111873819A (en) * | 2020-01-08 | 2020-11-03 | 杭州市中策职业学校 | Intelligent charging control device and control method for new energy automobile |
-
2018
- 2018-07-19 CN CN201821145708.6U patent/CN208950940U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757540A (en) * | 2018-07-19 | 2018-11-06 | 珠海格力电器股份有限公司 | Fan starting circuit and electrical equipment |
| CN108757540B (en) * | 2018-07-19 | 2024-05-10 | 珠海格力电器股份有限公司 | Fan starting circuit and electrical equipment |
| CN111873819A (en) * | 2020-01-08 | 2020-11-03 | 杭州市中策职业学校 | Intelligent charging control device and control method for new energy automobile |
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