CN208504630U - Dry combustion method protection circuit, humidifier and air conditioner - Google Patents
Dry combustion method protection circuit, humidifier and air conditioner Download PDFInfo
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- CN208504630U CN208504630U CN201820867047.1U CN201820867047U CN208504630U CN 208504630 U CN208504630 U CN 208504630U CN 201820867047 U CN201820867047 U CN 201820867047U CN 208504630 U CN208504630 U CN 208504630U
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- 238000009841 combustion method Methods 0.000 title claims description 56
- 230000010355 oscillation Effects 0.000 claims abstract description 70
- 238000001514 detection method Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 73
- 238000000889 atomisation Methods 0.000 claims description 59
- 230000003534 oscillatory effect Effects 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 10
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000003595 mist Substances 0.000 description 5
- 230000002633 protecting effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Abstract
The application relates to a dry combustion protection circuit, a humidifier and an air conditioner. When the atomizing piece lacks water, the atomizing piece amplitude increases, atomizing oscillation module amplitude increases, it is corresponding, the amplitude of the oscillating voltage signal that signal detection module detected also increases, when the electric potential of oscillating voltage signal is higher than the electric potential of reference voltage signal, voltage comparison module provides the signal of telecommunication to drive control module so that drive control module stops to provide drive signal for atomizing oscillation module, get into protection state fast, prevent that the atomizing piece from burning the damage futilely, and provide the signal of telecommunication to self-locking module, make from locking module give voltage comparison module with mains voltage signal output, form stable closed-loop locking, can work once more until power module is cut off the power supply, avoid atomizing piece to burn the damage futilely.
Description
Technical field
This application involves technical field of electrical equipment more particularly to a kind of dry combustion method protection circuits, humidifier and air conditioner.
Background technique
Nowadays, the equipment with humidification function has been used widely, and can increase humidity for environment.
Currently, ultrasonic humidifier is using a kind of relatively broad equipment with humidification function.Ultrasonic humidifier
Water in water tank can be discharged into air in a manner of being atomized.
With the operation of ultrasonic humidifier, the water in water tank can be gradually decreased.It is some in order to remind user to add water in time
Water shortage detection function is provided in ultrasonic humidifier, it is still, long mainly using tongue tube and the cooperation detection of magnetic float
After time use, tongue tube may fail, and lead to water shortage detection failure, when water shortage, which detects, to fail, the water in water tank is complete
After portion's atomization, it may appear that dry combustion method phenomenon occurs for atomizing piece idle running, and atomizing piece temperature increases rapidly, leads to atomizing piece lead
Solder joint falls off, cracks.In the related technology, portion of ultrasonic sound wave humidifier is protected with thermal fuse-link, but is all the driving function of detection
The temperature of rate pipe, when the temperature of driving power pipe reaches hot fuse protection temperature, atomizing piece may have been damaged, reaction compared with
Slowly.
The equipment with humidification function in the related technology exists above mostly because atomizing piece caused by no-water dry combustion is easy
The problem of damage.
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 dry combustion method protection electricity
Road, humidifier and air conditioner.
According to the embodiment of the present application in a first aspect, provide a kind of dry combustion method protection circuit, it is applied in humidifier, it is described
Humidifier includes power module for providing power supply voltage signal and for generating oscillation to drive the atomization of atomizing piece to shake
Swing module；The dry combustion method protection circuit includes: signal detection module, voltage comparison module, self-locking module and drive control module；
Wherein:
The first end of the signal detection module is connect with the first end of the atomization oscillation module, second end and the electricity
The first end connection for pressing comparison module, for detecting the oscillatory voltage signals of the atomization oscillation module and being supplied to the voltage
Comparison module；
The second end of the voltage comparison module is for receiving reference voltage signal, third end and the drive control module
First end connection, the 4th end connect with the first end of the self-locking module, for by the current potential of the oscillatory voltage signals and
The current potential of the reference voltage signal is compared, when the current potential of the oscillatory voltage signals is higher than the reference voltage signal
When current potential, the first electric potential signal is provided to the drive control module, and provide the second electric potential signal to the self-locking module；
The second end of the drive control module is connect with the second end of the atomization oscillation module, for described first
Under the control of electric potential signal, stop providing driving signal for the atomization oscillation module；
The second end of the self-locking module is connect with the first end of the voltage comparison module, third end and the power supply mould
The first end of block connects, under the control of second electric potential signal, the power supply voltage signal to be exported to the electricity
The first end of comparison module is pressed, the current potential of the power supply voltage signal is higher than the current potential of the reference voltage signal.
Optionally, the voltage comparison module is also used to the current potential when the oscillatory voltage signals lower than the reference electricity
When pressing the current potential of signal, controls the voltage comparison module and the drive control module disconnects, and mentioned to the self-locking module
For third electric potential signal；
The drive control module, be also used to be when the voltage comparison module and the drive control module disconnect
The atomization oscillation module, which provides driving signal, makes the atomization oscillation module work；
The self-locking module is also used under the control of the third electric potential signal, stops working.
Optionally, the voltage comparison module, including first comparator, first diode and first resistor；Wherein:
The normal phase input end of the first comparator for receiving the reference voltage signal, negative-phase input respectively with institute
The second end for stating self-locking module is connected with the first end of the first resistor, and the cathode of output end and the first diode connects
It connects；
The cathode of the first diode is also connect with the first end of the latching circuit, the positive and drive control mould
The first end of block connects；
The second end of the first resistor is connect with the second end of the signal detection module.
Optionally, the voltage comparison module, including the second comparator, the second diode, second resistance, 3rd resistor,
4th resistance and the first NPN type triode；Wherein:
The negative-phase input of second comparator for receiving the reference voltage signal, normal phase input end respectively with institute
The second end for stating self-locking module is connected with the first end of the second resistance, and the first end of output end and the 3rd resistor connects
It connects；
The second end of the second resistance is connect with the second end of the signal detection module；
The base stage of first NPN type triode connects with the second end of 3rd resistor and the first end of the 4th resistance respectively
It connects, collector is connect with the cathode of second diode, emitter ground connection；
The cathode of second diode is also connect with the first end of the self-locking module, the positive and drive control mould
The first end of block connects；
The second end of 4th resistance is grounded.
Optionally, the self-locking module, including switching transistor, the 5th resistance and the 6th resistance；Wherein:
The grid of the switching transistor is connect with the first end of the 5th resistance, the first end of the 6th resistance, source electrode
It is connect with the first end of the power module, drain electrode is connect with the first end of the voltage comparison module；
The second end of 5th resistance is connect with the 4th end of the voltage comparison module；
The second end of 6th resistance is connect with the first end of the power module.
Optionally, the switching transistor is PNP type triode or N-type metal-oxide-semiconductor.
It optionally, further include reference voltage module；
The first end of the reference voltage module is connect with the first end of the power module, second end and the voltage ratio
Second end compared with module connects.
Optionally, the reference voltage module includes the 7th resistance and the 8th resistance；Wherein:
The first end of 7th resistance is connect with the first end of the power module, second end respectively with the voltage ratio
It is connected compared with the second end of module with the first end of the 8th resistance；
The second end of 8th resistance is grounded.
Optionally, the third end of the drive control module is also connect with the first end of the power module；
The drive control module, including adjustable resistance, the second NPN type triode, first capacitor, the second capacitor, first
Inductance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor and the 14th resistance；Wherein:
The base stage of second NPN type triode first end, the first end of first capacitor with the 9th resistance respectively
Connection, collector connect with the first end of the tenth resistance, emitter respectively with the first end of the eleventh resistor, second
The first end of capacitor, the connection of the first end of twelfth resistor；
The second end of the twelfth resistor is connect with the first end of first inductance；
The second end of first inductance is connect with the second end of the atomization oscillation module；
The second end of 9th resistance is connect with the third end of the voltage comparison module；
The second end of tenth resistance is connect with the first end of the power module；
The second end of the first capacitor, the second end of the eleventh resistor, the second end of second capacitor ground connection；
The first end of the adjustable resistance is connect with the first end of the power module, second end and the thirteenth resistor
First end connection；
The second end of the thirteenth resistor respectively with the second end of the 9th resistance, the 14th resistance first
End connection；
The second end of 14th resistance is grounded.
Optionally, the emitter of second NPN type triode is connect with the second end of the voltage comparison module.
Optionally, the signal detection module includes third diode, the 4th diode, third capacitor, the 4th capacitor,
15 resistance and the 16th resistance；Wherein:
The first end of 15th resistance is connect with the first end of the atomization oscillation module, second end and the third
The first end of capacitor connects；
The second end of the third capacitor is connect with the cathode of the anode of the third diode, the 4th diode respectively；
The cathode of the third diode respectively with the first end of the voltage comparison module, the 16th resistance
One end is connected with the first end of the 4th capacitor；
The plus earth of 4th diode；
The second end of 4th capacitor is grounded；
The second end of 16th resistance is grounded.
According to a second aspect of the present application, a kind of humidifier is provided, comprising: humidifier；The humidifier includes using
In the power module for providing power supply voltage signal and for generating oscillation to drive the atomization oscillation module of atomizing piece；The humidification
Device further includes the dry combustion method protection circuit as described in any of the above item.
Optionally, the third end of the atomization oscillation module is connect with the second end of the power module；
The atomization oscillation module, comprising: crystal oscillator, third NPN type triode, the second inductance, third inductance, the 5th electricity
Appearance, the 6th capacitor, the 7th capacitor, the 8th capacitor and the 17th resistance；Wherein:
The base stage of the third NPN type triode connect with the first end of the 17th resistance respectively, the 5th capacitor
First end connection, collector are connect with the second end of the power module, and emitter is connect with the first end of second inductance；
The second end of 17th resistance respectively with the first end of the signal detection module, the drive control module
Second end, the first end of the 6th capacitor, the first end of the 7th capacitor connection；
The second end of 6th capacitor is connect with the first end of the crystal oscillator；
The second end of the crystal oscillator is connect with the second end of the power module；
The second end of 7th capacitor respectively with the second end of the second inductance, first end of third inductance, described
The first end of 8th capacitor connects；
Second end, the second end of the 8th capacitor of 5th capacitor connect with the second end of the power module respectively
It connects；
The second end of the third inductance is grounded.
According to the third aspect of the application, a kind of air conditioner, including water tank are provided, the atomization being set in the water tank
Piece, the humidifier being connect with the atomizing piece；The humidifier includes for providing the power module of power supply voltage signal
With for generating oscillation to drive the atomization oscillation module of atomizing piece；The humidifier further includes as described in any of the above item
Circuit is protected in dry combustion method.
The technical solution that embodiments herein provides can include the following benefits:
Due to including signal detection module, voltage comparison module, self-locking module and drive control mould in dry combustion method protection circuit
Block；Wherein: oscillatory voltage signals are supplied to voltage ratio by the oscillatory voltage signals of signal detection module detection atomization oscillation module
Compared with module；Also receive reference voltage signal in voltage comparison module, when atomizing piece water shortage, atomizing piece amplitude increases, atomization oscillation
Module amplitude increases, correspondingly, the amplitude for the oscillatory voltage signals that signal detection module detects also increases, when oscillating voltage is believed
Number current potential be higher than reference voltage signal current potential when, voltage comparison module to drive control module provide the first electric potential signal,
Drive control module under the control of the first electric potential signal, stop for atomization oscillation module provide driving signal make be atomized oscillation mode
Block stops working, and rapidly enters guard mode, prevents atomizing piece dry combustion method from damaging, and provides the second current potential letter to self-locking module
Number, self-locking module exports power supply voltage signal to voltage comparison module, under the control of the second electric potential signal due to power supply electricity
The current potential of signal is pressed to be higher than the current potential of reference voltage signal, voltage comparison module can export always the first electric potential signal, so that mist
Change oscillation module to stop working, and export the second electric potential signal to self-locking module always, forms stable closed loop locking, until
Power module be powered down could task again, avoid atomizing piece dry combustion method from damaging, compared with above-mentioned the relevant technologies, dry combustion method protecting effect
More preferably.
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 for dry combustion method protection circuit that the application one embodiment provides.
Fig. 2 is a kind of structural schematic diagram for dry combustion method protection circuit that another embodiment of the application provides.
Fig. 3 is a kind of structural schematic diagram for dry combustion method protection circuit that another embodiment of the application provides.
Fig. 4 is a kind of structural schematic diagram for dry combustion method protection circuit that another embodiment of the application provides.
Fig. 5 is a kind of structural schematic diagram for dry combustion method protection circuit that another embodiment of the application provides.
Fig. 6 is a kind of structural schematic diagram for dry combustion method protection circuit that another embodiment of the application provides.
Fig. 7 is a kind of structural schematic diagram for dry combustion method protection circuit that another embodiment of the application provides.
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 dry combustion method protection circuit of some aspects be described in detail in claims, the application, humidifier and air conditioner
Son.
Exist mostly above in view of the equipment with humidification function in the related technology because of atomizing piece caused by no-water dry combustion
The problem of being easily damaged.Based on this, a kind of dry combustion method protection circuit of humidifier is provided in the related technology, when detecting that water tank lacks
When water, atomizing piece dry combustion method, the power supply of protection signal cut atomizing piece can be sent to power control module, also, is not powered off at it
In the case where, it being reworked again by just can be carried out complete machine reset by reset key, not knowing the anhydrous feelings of water tank in user
Under condition, atomizing piece dry combustion method, detection, protection iterative cycles are easy to cause by reset key repeatedly, still atomizing piece are easy to cause to damage
It is bad.For this purpose, present applicant proposes a kind of new dry combustion methods to protect circuit, introduce in detail below.
Fig. 1 is a kind of structural schematic diagram for dry combustion method protection circuit that the application one embodiment provides.
Referring to Fig. 1, a kind of dry combustion method protection circuit provided in this embodiment is applied in humidifier, humidifier includes
For providing the power module 1 of power supply voltage signal and for generating oscillation to drive the atomization oscillation module 2 of atomizing piece；Dry combustion method
Protecting circuit includes: signal detection module 3, voltage comparison module 4, self-locking module 5 and drive control module 6；Wherein:
The first end of signal detection module 3 is connect with the first end of atomization oscillation module 2, second end and voltage comparison module
4 first end connection, for detecting the oscillatory voltage signals of atomization oscillation module 2 and being supplied to voltage comparison module 4；
The second end of voltage comparison module 4 is for receiving reference voltage signal Vref, third end and drive control module 6
First end connection, the 4th end are connect with the first end of self-locking module 5, for believing the current potential of oscillatory voltage signals and reference voltage
Number current potential be compared, when the current potential of oscillatory voltage signals be higher than reference voltage signal current potential when, to drive control module 6
First electric potential signal is provided, and provides the second electric potential signal to self-locking module 5；
The second end of drive control module 6 is connect with the second end of atomization oscillation module 2, in the first electric potential signal
Under control, stop providing driving signal for atomization oscillation module 2；
The second end of self-locking module 5 is connect with the first end of voltage comparison module 4, third end and the first of power module 1
End connection, under the control of the second electric potential signal, power supply voltage signal to be exported to the first end of voltage comparison module 4,
The current potential of power supply voltage signal is higher than the current potential of reference voltage signal.
Due to including signal detection module 3, voltage comparison module 4, self-locking module 5 and drive control in dry combustion method protection circuit
Module 6；Wherein: oscillatory voltage signals are supplied to by the oscillatory voltage signals of the detection atomization oscillation module 2 of signal detection module 3
Voltage comparison module 4；Reference voltage signal is also received in voltage comparison module 4, when atomizing piece water shortage, atomizing piece amplitude increases
Greatly, atomization 2 amplitude of oscillation module increases, correspondingly, the amplitude for the oscillatory voltage signals that signal detection module 3 detects also increases
Greatly, when the current potential of oscillatory voltage signals is higher than the current potential of reference voltage signal, voltage comparison module 4 is to drive control module 6
The first electric potential signal is provided, drive control module 6 stops providing for atomization oscillation module 2 under the control of the first electric potential signal
Driving signal makes 2 pieces of oscillation mode of atomization stop working, and rapidly enters guard mode, prevents atomizing piece dry combustion method from damaging, and to certainly
Lock module 5 provide the second electric potential signal, self-locking module 5 under the control of the second electric potential signal, by power supply voltage signal export to
Voltage comparison module, since the current potential of power supply voltage signal is higher than the current potential of reference voltage signal, voltage comparison module can be always
The first electric potential signal is exported, so that atomization oscillation module 2 stops working, and exports the second current potential letter to self-locking module 5 always
Number, form stable closed loop locking, until power module 1 be powered down could task again, avoid atomizing piece dry combustion method from damaging, and it is upper
It states the relevant technologies to compare, dry combustion method protecting effect is more preferable.
Correspondingly, amplitude is smaller when atomizing piece has water normal work, the current potential of oscillatory voltage signals is lower than reference voltage
The current potential of signal does not start dry combustion method protection at this point, atomization oscillating circuit works normally.Based on this, voltage comparison module 4 is also used
When being lower than the current potential of reference voltage signal when the current potential of oscillatory voltage signals, control voltage comparison module 4 and drive control mould
Block 6 disconnects, and provides third electric potential signal to self-locking module 5；Drive control module 6 is also used in voltage comparison module 4 and drives
When dynamic control module 6 disconnects, providing driving signal for atomization oscillation module 2 makes to be atomized the work of oscillation module 2；Self-locking module 5, also
For stopping working under the control of third electric potential signal.
Combined with specific embodiments below, above-mentioned dry combustion method protection circuit is described in detail.
When it is implemented, there are many specific structures of above-mentioned voltage comparison module 4.Two of them is set forth below.
One, the specific structure of voltage comparison module in circuit is protected in dry combustion method shown in Figure 2.In Fig. 2, voltage compares mould
Block 4, including first comparator U1, first diode D1 and first resistor R1；Wherein:
The normal phase input end of first comparator U1 for receiving reference voltage signal Vref, negative-phase input respectively with it is self-locking
The second end of module 5 is connected with the first end of first resistor R1, and output end is connect with the cathode of first diode D1；One or two pole
The cathode of pipe D1 is also connect with the first end of latching circuit 5, and anode is connect with the first end of drive control module 6；First resistor
The second end of R1 is connect with the second end of signal detection module 3.
In the present embodiment, the normal phase input end of first comparator U1 receives reference voltage signal Vref, and negative-phase input connects
Receive the oscillatory voltage signals for the atomization oscillation module 2 that signal detection module 3 detects；When atomizing piece has water conservancy project to make, oscillating voltage
The current potential of signal is lower than the current potential of reference voltage signal, and the output end of first comparator U1 exports high potential signal, due to first
The cathode of the output end connection first diode D1 of comparator U1, first diode D1 cut-off, the anode of first diode D1 is even
Drive control module 6 is connect, at this point, voltage comparison module 4 and drive control module 6 disconnect, drive control module 6 is not by voltage ratio
Compared with the influence of module 4, the cathode of first diode D1 connects self-locking module 5, at this point, providing high potential signal for self-locking module 5
(i.e. above-mentioned third electric potential signal)；When the work of atomizing piece water shortage, the amplitude of atomizing piece increases, and is atomized the amplitude of oscillation module 2
Increasing, the amplitude of oscillatory voltage signals that signal detection module 3 detects increases with it, more than the current potential of reference voltage signal, the
The output end of one comparator U1 exports low-potential signal, first diode D1 conducting, at this point, providing for drive control module 6 low
Electric potential signal (i.e. above-mentioned first electric potential signal), and low-potential signal (i.e. above-mentioned second electric potential signal) is provided for self-locking module 5.
Two, the specific structure of voltage comparison module in circuit is protected in dry combustion method shown in Figure 3.In Fig. 3, voltage compares mould
Block 4, including the second comparator U2, the second diode D2, second resistance R2,3rd resistor R3, the 4th resistance R4 and the first NPN type
Triode Q1；Wherein:
The negative-phase input of second comparator U1 for receiving reference voltage signal Vref, normal phase input end respectively with it is self-locking
The second end of module 5 is connected with the first end of second resistance R2, and output end is connect with the first end of 3rd resistor R3；Second resistance
The second end of R2 is connect with the second end of signal detection module 3；The base stage of first NPN type triode Q1 respectively with 3rd resistor R3
Second end connected with the first end of the 4th resistance R4, collector is connect with the cathode of the second diode D2, emitter ground connection；The
The cathode of two diode D2 is also connect with the first end of self-locking module 5, and anode is connect with the first end of drive control module 6；The
The second end of four resistance R4 is grounded.
In the present embodiment, the negative-phase input of the second comparator U2 receives reference voltage signal Vref, and normal phase input end connects
Receive the oscillatory voltage signals for the atomization oscillation module 2 that signal detection module 3 detects；When atomizing piece has water conservancy project to make, oscillating voltage
The current potential of signal is lower than the current potential of reference voltage signal, and the output end of the second comparator U2 exports low-potential signal, due to second
The output end of comparator U2 connects the base stage of the first NPN type triode Q1, the first NPN type triode Q1 cut-off, correspondingly, second
Diode D2 cut-off, the anode connection drive control module 6 of the second diode D2, at this point, voltage comparison module 4 and drive control
Module 6 disconnects, and drive control module 6 is not influenced by voltage comparison module 4, and the cathode of the second diode D2 connects self-locking module
5, at this point, providing high potential signal (i.e. above-mentioned third electric potential signal) for self-locking module 5；When the work of atomizing piece water shortage, atomization
The amplitude of piece increases, and the amplitude of atomization oscillation module 2 increases, the amplitudes of the oscillatory voltage signals that signal detection module 3 detects with
Increase, more than the current potential of reference voltage signal, the output end of the second comparator U2 exports high potential signal, the first NPN type three
Pole pipe Q1 conducting, correspondingly, the second diode D2 is connected, at this point, it is (i.e. above-mentioned to provide low-potential signal for drive control module 6
First electric potential signal), and low-potential signal (i.e. above-mentioned second electric potential signal) is provided for self-locking module 5.
In the structure of two kinds of voltage comparison modules enumerated above, the normal phase input end and inverting input terminal of comparator are all
A signal is only inputted, the signal not being superimposed responds quicker.
When it is implemented, there are many specific structures of above-mentioned self-locking module.With continued reference to Fig. 2 and Fig. 3, Fig. 2 and Fig. 3 are shown
A kind of specific structure of self-locking module, self-locking module 5, including switching transistor T, the 5th resistance R5 and the 6th resistance R6；Its
In:
The grid of switching transistor T is connect with the first end of the 5th resistance R5, the first end of the 6th resistance R6, source electrode and electricity
The first end Vcc1 connection of source module 1, drain electrode are connect with the first end of voltage comparison module 4；The second end of 5th resistance R5 with
4th end of voltage comparison module 4 connects；The second end of 6th resistance R6 is connect with the first end Vcc1 of power module 1.
With reference to the above related embodiment it is found that when atomizing piece has water conservancy project to make, voltage comparison module 4 exports high potential letter
Number, correspondingly, the grid of switching transistor T is high potential, switching transistor T cut-off, self-locking module, which does not work, (stops work
Make), the first end of voltage comparison module 4 is influenced by oscillatory voltage signals.When the work of atomizing piece water shortage, voltage comparison module
4 output low level signals, correspondingly, the current potential of the grid of switching transistor T is pulled low, switching transistor T conducting, by power supply mould
The power supply voltage signal that block 1 provides is supplied to the first end of voltage comparison module 4, at this point, due to the current potential of power supply voltage signal
Higher than the current potential of reference voltage signal, voltage comparison module 4 exports always low level signal, so that closed loop locking is formed, unless
Power module 1 powers off.
Wherein, switching transistor can be, but not limited to as PNP type triode or N-type metal-oxide-semiconductor, as long as switch can be played
Effect.It is to be illustrated in Fig. 2 and Fig. 3 by taking PNP type triode as an example.
When it is implemented, the received reference voltage signal of voltage comparison module 4 can be the fixed voltage signal of setting.
If reference voltage signal is preset fixed voltage signal, optionally, referring to fig. 4 and Fig. 5, the present embodiment provides
Dry combustion method protect circuit, further include reference voltage module 7；The first end of reference voltage module 7 and the first end of power module 1
Vcc1 connection, second end are connect with the second end of voltage comparison module 4.
Specifically, referring to fig. 4 and Fig. 5, reference voltage module 7 includes the 7th resistance R7 and the 8th resistance R8；Wherein:
The first end of 7th resistance R7 is connect with the first end Vcc1 of power module 1, the second end mould compared with voltage respectively
The second end of block 4 is connected with the first end of the 8th resistance R8；The second end of 8th resistance R8 is grounded.
In Fig. 4, the normal phase input end of first comparator U1 receives reference voltage signal, therefore, the second of the 7th resistance R7
End is connect with the normal phase input end of first comparator U1.
In Fig. 5, the negative-phase input of the second comparator U2 receives reference voltage signal, therefore, the second of the 7th resistance R7
End is connect with the negative-phase input of the second comparator U2.
In the present embodiment, reference voltage signal is to be generated by the 7th resistance R7 and the 8th resistance R8 to source voltage
's.
In addition to the structure of reference voltage module listed above, reference voltage module can also be regulator block, or may be used also
To be controllable accurate voltage-stablizer, such as TL431, etc..
When it is implemented, there are many specific structures of above-mentioned drive control module.With continued reference to Fig. 2 and Fig. 3, drive control
The third end of module 6 is also connect with the first end Vcc1 of power module 1.Specifically, drive control module 6, including adjustable resistance
R ', the second NPN type triode Q2, first capacitor C1, the second capacitor C2, the first inductance L1, the 9th resistance R9, the tenth resistance R10,
Eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13 and the 14th resistance R14；Wherein:
The base stage of second NPN type triode Q2 connects with the first end of the 9th resistance R9, the first end of first capacitor C1 respectively
Connect, collector is connect with the first end of the tenth resistance R10, emitter respectively with the first end of eleventh resistor R11, the second capacitor
The first end of C2, the connection of the first end of twelfth resistor R12；The first of the second end of twelfth resistor R12 and the first inductance L1
End connection；The second end of first inductance L1 is connect with the second end of atomization oscillation module 2；The second end and voltage of 9th resistance R9
The third end of comparison module 4 connects；The second end of tenth resistance R10 is connect with the first end Vcc1 of power module 1；First capacitor
The second end of C1, the second end of eleventh resistor R11, the second end of the second capacitor C2 ground connection；The first end of adjustable resistance R ' with
The first end Vcc1 connection of power module 1, second end are connect with the first end of thirteenth resistor R13；The of thirteenth resistor R13
Two ends are connect with the second end of the 9th resistance R9, the first end of the 14th resistance R14 respectively；The second end of 14th resistance R14
Ground connection.
In the present embodiment, the emitter follower being made up of in drive control module 6 the second NPN type triode Q2 is to atomization
Oscillation module provides driving signal.With reference to the above related embodiment it is found that when atomizing piece has water conservancy project to make, voltage comparison module 4
It being disconnected with drive control module 6, drive control module 6 is unaffected, it works normally, when the work of atomizing piece water shortage, voltage ratio
Low level signal is exported compared with module 4, the current potential of the base stage of the second NPN type triode Q2 is pulled low, and driving signal is ended, atomization
Oscillation module stops working, and prevents atomizing piece dry combustion method.
Wherein, adjustable resistance R ' can change the current potential of the second NPN type triode Q2 base stage, and then change driving signal
Current potential realizes the adjusting of fog-supplying amount to change the oscillation amplitude size of atomization oscillation module.
Above-mentioned reference voltage signal is also possible to the driving signal extracted from drive control module.
If the received reference voltage signal of voltage comparison module 4 is the driving signal extracted from drive control module,
Optionally, referring to Fig. 6 and Fig. 7, the emitter of the second NPN type triode Q2 is connect with the second end of voltage comparison module 4.
In Fig. 6, the normal phase input end of first comparator U1 receives reference voltage signal, therefore, the second NPN type triode Q2
Emitter connect with the normal phase input end of first comparator U1.
In Fig. 7, the negative-phase input of the second comparator U2 receives reference voltage signal, therefore, the second NPN type triode Q2
Emitter connect with the negative-phase input of the second comparator U2.
Due to the driving signal of drive control module 6 voltage (i.e. current potential) size relation 2 amplitude of atomization oscillating circuit
Size, therefore, the voltage swing of the oscillatory voltage signals of detection is also related with the voltage swing of driving signal, driving signal
Voltage is bigger, and the voltage of the vibration potential signal of detection is also bigger, and the voltage of driving signal is smaller, the oscillatory voltage signals of detection
Voltage it is also smaller, therefore work normally when, the oscillatory voltage signals of detection and the difference of reference voltage signal are with mist amount
Gear size is changing, and when there is water shortage, difference is bigger, and the oscillatory voltage signals of detection reach reference voltage signal
Time is longer, and it is longer that comparator enters the time that protection needs.In the present embodiment, by by the driving in drive control module
Signal signal as the reference voltage, when mist amount gear increases, the voltage of driving signal increases, and the voltage of reference voltage signal increases
Greatly, the voltage for the oscillatory voltage signals that signal detection module detects just increases accordingly, and therefore, when normal work, can guarantee
In different mist amount gears, reference voltage signal is same or similar with the difference of the oscillatory voltage signals of detection, water shortage occurs
When can timely enter protection, will reduce the time difference.
When it is implemented, there are many specific structures of above-mentioned signal detection module.With continued reference to Fig. 2 and Fig. 3, signal detection
Module 3 includes third diode D3, the 4th diode D4, third capacitor C3, the 4th capacitor C4, the 15th resistance R15 and the tenth
Six resistance R16；Wherein:
The first end of 15th resistance R15 is connect with the first end of atomization oscillation module 2, and second end is with third capacitor C3's
First end connection；The second end of third capacitor C3 is connect with the cathode of the anode of third diode D3, the 4th diode D4 respectively；
The cathode of third diode D3 respectively with the first end of voltage comparison module 4, the first end of the 16th resistance R16 and the 4th capacitor
The first end of C4 connects；The plus earth of 4th diode D4；The second end of 4th capacitor C4 is grounded；16th resistance R16's
Second end ground connection.
In the present embodiment, the high frequency ac signal for being atomized oscillation module can be converted to low-voltage direct by signal detection module
Signal, specifically, high frequency ac signal is depressured after coupling by the 15th resistance R15, third capacitor C3 by third diode
D3 and the 4th diode D4 rectification, filters using the 16th resistance R16 and the 4th capacitor C4, forms stable low-voltage direct letter
Number.When the work of atomizing piece water shortage, amplitude increases, and the amplitude for being atomized oscillating circuit increases, correspondingly, the low-voltage direct after conversion
The amplitude of signal also increases.
One embodiment of the application also provides a kind of humidifier, comprising: humidifier；Humidifier includes for providing
The power module of power supply voltage signal and for generating oscillation to drive the atomization oscillation module of atomizing piece；Humidifier further includes
Circuit is protected in dry combustion method as described in any of the above embodiment.In the present embodiment, due to using above-described dry combustion method protection electricity
Therefore road has similar beneficial effect, details are not described herein again.
There are many specific structures of above-mentioned atomization oscillation module.Optionally, referring to fig. 2~Fig. 7, atomization oscillation module 2
Third end is connect with the second end Vcc2 of power module 1.Specifically, atomization oscillation module 2, comprising: crystal oscillator Y, third NPN type three
Pole pipe Q3, the second inductance L2, third inductance L3, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8 and
17 resistance R17；Wherein:
The base stage of third NPN type triode Q3 connect with the first end of the 17th resistance R17 respectively, the 5th capacitor C5
One end connection, collector are connect with the second end of power module 1, and emitter is connect with the first end of the second inductance L2；17th
The second end of resistance R17 respectively with the first end of signal detection module 3, the second end of drive control module 6, the 6th capacitor C6
First end, the connection of the first end of the 7th capacitor C7；The second end of 6th capacitor C6 is connect with the first end of crystal oscillator Y；The of crystal oscillator Y
Two ends are connect with the second end of power module 1；The second end of 7th capacitor C7 is electric with the second end of the second inductance L2, third respectively
Feel first end, the connection of the first end of the 8th capacitor C8 of L3；Second end, the second end of the 8th capacitor C8 difference of 5th capacitor C5
It is connect with the second end of power module 1；The second end of third inductance L3 is grounded.
Wherein, the second end Vcc2 of power module 1 can export different power supply voltage signals from first end Vcc1.When
So, atomization oscillation module 2 can also be connect with the first end Vcc1 of power module 1, using power supply electricity identical with other modules
Press signal.
One embodiment of the application also provides a kind of air conditioner, including water tank, the atomizing piece being set in water tank, with mist
Change the humidifier of piece connection；Humidifier include power module for providing power supply voltage signal and for generate oscillation with
Drive the atomization oscillation module of atomizing piece；Humidifier further includes the dry combustion method protection circuit as described in any of the above embodiment.This
In embodiment, circuit is protected due to using above-described dry combustion method, there is similar beneficial effect, herein no longer
It repeats.
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 (14)
1. circuit is protected in a kind of dry combustion method, which is characterized in that be applied in humidifier, the humidifier includes for providing electricity
The power module of source voltage signal and for generating oscillation to drive the atomization oscillation module of atomizing piece；Circuit is protected in the dry combustion method
It include: signal detection module, voltage comparison module, self-locking module and drive control module；Wherein:
The first end of the signal detection module is connect with the first end of the atomization oscillation module, second end and the voltage ratio
First end compared with module connects, and compares for detecting the oscillatory voltage signals of the atomization oscillation module and being supplied to the voltage
Module；
The second end of the voltage comparison module is for receiving reference voltage signal, and the of third end and the drive control module
One end connection, the 4th end connect with the first end of the self-locking module, for by the current potential of the oscillatory voltage signals with it is described
The current potential of reference voltage signal is compared, when the current potential of the oscillatory voltage signals is higher than the current potential of the reference voltage signal
When, the first electric potential signal is provided to the drive control module, and provide the second electric potential signal to the self-locking module；
The second end of the drive control module is connect with the second end of the atomization oscillation module, in first current potential
Under the control of signal, stop providing driving signal for the atomization oscillation module；
The second end of the self-locking module is connect with the first end of the voltage comparison module, third end and the power module
First end connection, under the control of second electric potential signal, the power supply voltage signal to be exported to the voltage ratio
Compared with the first end of module, the current potential of the power supply voltage signal is higher than the current potential of the reference voltage signal.
2. circuit is protected in dry combustion method according to claim 1, which is characterized in that the voltage comparison module is also used to work as institute
State oscillatory voltage signals current potential be lower than the reference voltage signal current potential when, control the voltage comparison module and the drive
Dynamic control module disconnects, and provides third electric potential signal to the self-locking module；
The drive control module is also used to when the voltage comparison module and the drive control module disconnect, is described
Atomization oscillation module, which provides driving signal, makes the atomization oscillation module work；
The self-locking module is also used under the control of the third electric potential signal, stops working.
3. circuit is protected in dry combustion method according to claim 1 or 2, which is characterized in that the voltage comparison module, including first
Comparator, first diode and first resistor；Wherein:
The normal phase input end of the first comparator for receiving the reference voltage signal, negative-phase input respectively with it is described from
The second end of lock module is connected with the first end of the first resistor, and output end is connect with the cathode of the first diode；
The cathode of the first diode is also connect with the first end of the latching circuit, positive and the drive control module
First end connection；
The second end of the first resistor is connect with the second end of the signal detection module.
4. circuit is protected in dry combustion method according to claim 1 or 2, which is characterized in that the voltage comparison module, including second
Comparator, the second diode, second resistance, 3rd resistor, the 4th resistance and the first NPN type triode；Wherein:
The negative-phase input of second comparator for receiving the reference voltage signal, normal phase input end respectively with it is described from
The second end of lock module is connected with the first end of the second resistance, and output end is connect with the first end of the 3rd resistor；
The second end of the second resistance is connect with the second end of the signal detection module；
The base stage of first NPN type triode is connect with the first end of the second end of 3rd resistor and the 4th resistance respectively, collection
Electrode is connect with the cathode of second diode, emitter ground connection；
The cathode of second diode is also connect with the first end of the self-locking module, positive and the drive control module
First end connection；
The second end of 4th resistance is grounded.
5. circuit is protected in dry combustion method according to claim 1 or 2, which is characterized in that the self-locking module, including switch crystal
Pipe, the 5th resistance and the 6th resistance；Wherein:
The grid of the switching transistor is connect with the first end of the 5th resistance, the first end of the 6th resistance, source electrode and institute
The first end connection of power module is stated, drain electrode is connect with the first end of the voltage comparison module；
The second end of 5th resistance is connect with the 4th end of the voltage comparison module；
The second end of 6th resistance is connect with the first end of the power module.
6. circuit is protected in dry combustion method according to claim 5, which is characterized in that the switching transistor is PNP type triode
Or N-type metal-oxide-semiconductor.
7. circuit is protected in dry combustion method according to claim 1 or 2, which is characterized in that further include reference voltage module；
The first end of the reference voltage module is connect with the first end of the power module, second end mould compared with the voltage
The second end of block connects.
8. circuit is protected in dry combustion method according to claim 7, which is characterized in that the reference voltage module includes the 7th resistance
With the 8th resistance；Wherein:
The first end of 7th resistance is connect with the first end of the power module, the second end mould compared with the voltage respectively
The second end of block is connected with the first end of the 8th resistance；
The second end of 8th resistance is grounded.
9. circuit is protected in dry combustion method according to claim 1 or 2, which is characterized in that the third end of the drive control module
Also it is connect with the first end of the power module；
The drive control module, including adjustable resistance, the second NPN type triode, first capacitor, the second capacitor, the first inductance,
9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor and the 14th resistance；Wherein:
The base stage of second NPN type triode is connect with first end, the first end of first capacitor of the 9th resistance respectively,
Collector is connect with the first end of the tenth resistance, emitter respectively with the first end of the eleventh resistor, the second capacitor
First end, the first end of twelfth resistor connection；
The second end of the twelfth resistor is connect with the first end of first inductance；
The second end of first inductance is connect with the second end of the atomization oscillation module；
The second end of 9th resistance is connect with the third end of the voltage comparison module；
The second end of tenth resistance is connect with the first end of the power module；
The second end of the first capacitor, the second end of the eleventh resistor, the second end of second capacitor ground connection；
The first end of the adjustable resistance is connect with the first end of the power module, and the of second end and the thirteenth resistor
One end connection；
The second end of the thirteenth resistor connects with the second end of the 9th resistance, the first end of the 14th resistance respectively
It connects；
The second end of 14th resistance is grounded.
10. circuit is protected in dry combustion method according to claim 9, which is characterized in that the emitter of second NPN type triode
It is connect with the second end of the voltage comparison module.
11. circuit is protected in dry combustion method according to claim 1 or 2, which is characterized in that the signal detection module includes third
Diode, the 4th diode, third capacitor, the 4th capacitor, the 15th resistance and the 16th resistance；Wherein:
The first end of 15th resistance is connect with the first end of the atomization oscillation module, second end and the third capacitor
First end connection；
The second end of the third capacitor is connect with the cathode of the anode of the third diode, the 4th diode respectively；
The cathode of the third diode first end with the first end of the voltage comparison module, the 16th resistance respectively
It is connected with the first end of the 4th capacitor；
The plus earth of 4th diode；
The second end of 4th capacitor is grounded；
The second end of 16th resistance is grounded.
12. a kind of humidifier characterized by comprising humidifier；The humidifier includes for providing supply voltage letter
Number power module and for generating oscillation to drive the atomization oscillation module of atomizing piece；The humidifier further includes such as right
It is required that circuit is protected in 1~11 described in any item dry combustion methods.
13. humidifier according to claim 12, which is characterized in that the third end of the atomization oscillation module and the electricity
The second end of source module connects；
The atomization oscillation module, comprising: crystal oscillator, third NPN type triode, the second inductance, third inductance, the 5th capacitor,
Six capacitors, the 7th capacitor, the 8th capacitor and the 17th resistance；Wherein:
The base stage of the third NPN type triode connect with the first end of the 17th resistance respectively, the 5th capacitor first
End connection, collector are connect with the second end of the power module, and emitter is connect with the first end of second inductance；
The second end of 17th resistance respectively with the first end of the signal detection module, the drive control module
Two ends, the first end of the 6th capacitor, the connection of the first end of the 7th capacitor；
The second end of 6th capacitor is connect with the first end of the crystal oscillator；
The second end of the crystal oscillator is connect with the second end of the power module；
The second end of 7th capacitor respectively with the second end of second inductance, the first end of third inductance, the described 8th
The first end of capacitor connects；
The second end of 5th capacitor, the second end of the 8th capacitor are connect with the second end of the power module respectively；
The second end of the third inductance is grounded.
14. a kind of air conditioner, which is characterized in that including water tank, the atomizing piece being set in the water tank connects with the atomizing piece
The humidifier connect；The humidifier includes power module for providing power supply voltage signal and for generating oscillation to drive
The atomization oscillation module of dynamic atomizing piece；The humidifier further includes dry combustion method protection as claimed in any one of claims 1 to 11
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820867047.1U CN208504630U (en) | 2018-06-05 | 2018-06-05 | Dry combustion method protection circuit, humidifier and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820867047.1U CN208504630U (en) | 2018-06-05 | 2018-06-05 | Dry combustion method protection circuit, humidifier and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208504630U true CN208504630U (en) | 2019-02-15 |
Family
ID=65288504
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820867047.1U Withdrawn - After Issue CN208504630U (en) | 2018-06-05 | 2018-06-05 | Dry combustion method protection circuit, humidifier and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN208504630U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507103A (en) * | 2018-06-05 | 2018-09-07 | 珠海格力电器股份有限公司 | Dry combustion method protection circuit, humidifier and air conditioner |
| CN114294740A (en) * | 2021-12-30 | 2022-04-08 | 广州市君卓信息科技有限公司 | Atomization frequency tracking and water level detection system of atomization piece |
-
2018
- 2018-06-05 CN CN201820867047.1U patent/CN208504630U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507103A (en) * | 2018-06-05 | 2018-09-07 | 珠海格力电器股份有限公司 | Dry combustion method protection circuit, humidifier and air conditioner |
| CN108507103B (en) * | 2018-06-05 | 2023-08-18 | 珠海格力电器股份有限公司 | Dry combustion method protection circuit, humidifier and air conditioner |
| CN114294740A (en) * | 2021-12-30 | 2022-04-08 | 广州市君卓信息科技有限公司 | Atomization frequency tracking and water level detection system of atomization piece |
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