CN115528891A - Switch control circuit, anion generator and refrigerator - Google Patents

Switch control circuit, anion generator and refrigerator Download PDF

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Publication number
CN115528891A
CN115528891A CN202211234878.2A CN202211234878A CN115528891A CN 115528891 A CN115528891 A CN 115528891A CN 202211234878 A CN202211234878 A CN 202211234878A CN 115528891 A CN115528891 A CN 115528891A
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CN
China
Prior art keywords
circuit
switching tube
transformer
feedback
protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211234878.2A
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Chinese (zh)
Inventor
莫仰顺
宋志忠
龚春生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202211234878.2A priority Critical patent/CN115528891A/en
Publication of CN115528891A publication Critical patent/CN115528891A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/14—Plasma, i.e. ionised gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T23/00—Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection

Abstract

The invention discloses a switch control circuit, a negative ion generator and a refrigerator. Wherein, this switch control circuit includes: and the feedback circuit is connected between the power supply and the switching tube and used for controlling the switching state of the switching tube through intermittent feedback of an oscillation signal, and the switching tube is connected with the load circuit. According to the invention, the intermittent on-off control is set, so that the technical problem of high energy consumption of the load circuit in the prior art is solved, and the circuit energy consumption of the load circuit is reduced.

Description

Switch control circuit, anion generator and refrigerator
Technical Field
The invention relates to the technical field of circuit control, in particular to a switch control circuit, an anion generator and a refrigerator.
Background
In the prior art, the refrigerator negative ions are a physical means for freshness preservation and sterilization of fruits and vegetables, but if the effect of freshness preservation and sterilization is required to be met, the negative ion generator needs to work for a long time, and the space is in a concentration standard of negative ion concentration reaching the freshness preservation and sterilization for a long time.
In the prior art, the negative ion generating circuit must be in a long-term working state all the time, although the power of the general generator is not high compared with other electric appliances, the energy consumption is high due to the long-term working state.
Aiming at the problem of high energy consumption of the anion generator in the prior art, no effective solution is provided at present.
Disclosure of Invention
The embodiment of the invention provides a switch control circuit, an anion generator and a refrigerator, and aims to solve the technical problem that the anion generator in the prior art is high in energy consumption.
In order to solve the above technical problem, the present invention provides a switch control circuit, including: and the feedback circuit is connected between the power supply and the switching tube and used for controlling the switching state of the switching tube through intermittent feedback of an oscillation signal, and the switching tube is connected with the load circuit.
Further, the feedback circuit includes: the transformer comprises a first resistor, an energy storage element and a transformer, wherein the first resistor and the energy storage element are connected in parallel, the first resistor and the energy storage element are connected in parallel to form a loop, and the transformer comprises an auxiliary winding and a primary winding.
Further, the switching tube is an NPN triode, a base of the NPN triode is connected with the auxiliary winding of the transformer to form feedback, a collector is connected with the primary winding of the transformer, and an emitter is grounded.
Further, the switch tube is an NPN triode, and the switch control circuit further includes: and the protection circuit is connected with the switching tube and is used for carrying out current-limiting protection on the base electrode and the collector electrode of the switching tube.
Further, the protection circuit includes: and the second resistor is connected between the base of the switching tube and an auxiliary winding of a transformer of the feedback circuit and protects the base by current limiting and voltage dividing.
Further, the protection circuit includes: and the first capacitor is connected between the collector and the emitter of the switching tube and is used for carrying out buffer protection and back-voltage breakdown protection on the switching tube.
Further, the protection circuit includes: and the voltage stabilizing diode is connected between the base electrode of the switching tube and the ground and is used for providing starting voltage for the switching tube and performing overvoltage protection on the base electrode of the switching tube.
According to another aspect of the embodiments of the present application, there is also provided a diagnostic device of an ice thermal storage system, including: the anion generator includes the switch control circuit of any one of claims 1 to 7.
Further, the negative ion generator further includes: the load circuit is connected with a transformer of the switch control circuit and is used for generating negative ions through high-voltage ionization output by the transformer.
According to another aspect of the embodiments of the present application, there is also provided a refrigerator including the negative ion generator as described in the above embodiments.
By applying the technical scheme of the invention, the switch control circuit comprises a feedback circuit which is connected between a power supply and a switch tube and used for intermittently controlling the switch state of the switch tube through oscillation signals in a feedback manner, the switch tube is connected with a load circuit, the feedback circuit adopts an intermittent control feedback design and controls the switch tube to perform signal feedback between the switch tubes, so that the intermittent control of the oscillation signals on the switch state of the switch circuit can be realized. The switching state of the switching tube is intermittently controlled through the feedback circuit, the on-off time of the switching tube is controlled and changed, the switching times of the switching tube in the same time are reduced, the output frequency of the load circuit is reduced, the low-frequency output working state is realized, the output power of the load circuit is reduced, the load circuit is in a low energy consumption state, intermittent on-off control is set, the technical problem that the energy consumption of the load circuit is high in the prior art is solved, and the circuit energy consumption of the load circuit is reduced.
Drawings
FIG. 1 is a flow diagram of a switch control circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a switch control circuit in an embodiment of the present invention;
FIG. 3 is a waveform diagram of an oscillating signal according to an embodiment of the present invention;
fig. 4 is a block diagram of a structure of an anion generator according to an embodiment of the invention;
fig. 5 is a logic diagram of the ionizer in this embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely a relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The words "if", as used herein may be interpreted as "at \8230; \8230whenor" when 8230; \8230when or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or device comprising the element.
An alternative embodiment of the present invention is described in detail below with reference to the drawings.
Example 1
Fig. 1 is a block diagram of a switch control circuit according to an embodiment of the present invention, as shown in fig. 1, the circuit including the following:
the feedback circuit 10 is connected between a power supply and a switching tube and is used for controlling the switching state of the switching tube through intermittent feedback of an oscillation signal, and the switching tube is connected with a load circuit;
the feedback circuit of the present embodiment is also referred to as an intermittent feedback circuit.
Optionally, the switch tube of this embodiment is a triode, such as an NPC transistor. The transformer is a boost converter.
The load circuit may be adapted and selected according to the type of functional device, such as a control converter of an anion generator, and the functional device may be a plasma generator, an ozone generator, an igniter, a ballast, etc.
In the oscillation signal of the present embodiment, the feedback circuit generates the oscillation signal when being turned on, and no oscillation signal is generated when the feedback circuit is turned off.
Through above-mentioned on-off control circuit, on-off control circuit includes, feedback circuit connects between power and switch tube for through oscillating signal intermittent type feedback control the on off state of switch tube, the switch tube is connected with load circuit, adopts intermittent type control's feedback design, feedback circuit carries out signal feedback through controlling the switch tube between the switch tube, can realize oscillating signal intermittent type control switch circuit's on off state. The switching state of the switching tube is intermittently controlled through the feedback circuit, the on-off time of the switching tube is controlled and changed, the switching times of the switching tube in the same time are reduced, the output frequency of the load circuit is reduced, the low-frequency output working state is realized, the output power of the load circuit is reduced, the load circuit is in a low energy consumption state, intermittent on-off control is set, the technical problem that the energy consumption of the load circuit is high in the prior art is solved, and the circuit energy consumption of the load circuit is reduced.
In one implementation of this embodiment, the feedback circuit includes: the transformer comprises a first resistor, an energy storage element and a transformer, wherein the first resistor and the energy storage element are connected in parallel and form a loop, and the transformer comprises an auxiliary winding and a primary winding.
Compared with a feedback circuit formed by connecting a resistor and a capacitor in series in the related technology, the feedback circuit has the effect of time delay, but the principle is that the feedback time cannot be shortened after the feedback time is not changed. The feedback circuit of the embodiment can shorten the feedback time, and can control the output frequency by adjusting the resistance-capacitance ratio.
As shown in fig. 2, J1 and J3 are power terminals for supplying power, RE1 is a first resistor, and CA3 is an energy storage element. The energy storage element may be a capacitive element or an inductive element, and fig. 2 illustrates a capacitive element as an example.
In an embodiment, the switching tube is an NPN triode, a base (a pole B) of the NPN triode is connected to the auxiliary winding of the transformer to form a feedback, a collector (a pole C) is connected to the primary winding of the transformer, and an emitter (a pole E) is grounded. Fig. 2 is a circuit diagram of a switch control circuit according to an embodiment of the present invention, and QE1 is an NPN transistor.
Taking the switching tube as an NPN triode as an example, the operation principle of the feedback circuit is explained here, and as shown in fig. 2, the transformer includes an auxiliary winding L1 and a primary winding L2.
The circuit is electrified, the triode (NPN triode) is conducted through the base electrode of the triode from the CA3 and the L1, and the electricity of the J1 directly passes through the triode through the L2 to form a loop. When the power is switched on, an excitation inductor is generated, then magnetic flux is generated, the magnetic flux can influence the electromotive force of the L1, the homonymous end and the heteronymous end of the L1 and the L2 are opposite, the L1 obtains an opposite electromotive force, and the triode is cut off through the RE2.
The intermittent control in this embodiment is a time for intermittently turning on the transistor. For example, the transformer can normally operate in the first period, and in the second period, since the capacitor is still discharging, if the capacitor is not completely discharged, the power is not supplied to the triode any more, and no current flows through the L1. When the isoelectric capacitor finishes charging, current and voltage pass through the triode and are conducted again, so that the intermittent control of capacitance feedback is realized.
In some examples, the feedback circuit further includes a current limiting resistor connected between the base of the switching tube and the auxiliary winding of the transformer. See RE2 in fig. 2.
QE1 is NPN triode, which plays the role of controlling on and off in the circuit; when the circuit is powered on, a positive voltage is supplied to the B pole through the CA3 and the transformer coil, the triode enters a conducting state, at the moment, current passes through the main winding circuit of the transformer to generate alternating current flux, and the auxiliary winding induces a reverse electromotive force (negative voltage) to the B pole to force the triode to be cut off.
RE1 and CA3 play a feedback delay role, the energy storage element charges at the moment of electrifying, the feedback circuit is in a conducting state at the moment, the energy storage element is fully filled with the feedback circuit and is in a disconnected state, and the first resistor discharges and consumes the capacitor after the capacitor is fully filled.
When the switch control circuit works, the NPN triode plays a role in controlling conduction and disconnection in the circuit, the circuit supplies positive voltage to the B pole of the NPN triode at the moment of conduction through the CA3 and the transformer coil, the NPN triode enters a conduction state, current passes through the main winding path of the transformer at the moment, alternating current flux is generated, and the auxiliary winding induces a reverse electromotive force (negative voltage) to the B pole of the NPN triode to force the triode to be cut off.
The intermittent control in this embodiment refers to the intermittent oscillation to control the switching of the load circuit, and the intermittent oscillation refers to the phenomenon that the switching action is performed in a certain period of time, and the switching action is not performed in the next adjacent period of time; the self-vibration flyback boost design is utilized to be connected in parallel with a resistance capacitor of a feedback circuit to form delay feedback, during intermittent feedback, current in the feedback is absorbed through the capacitor CA3, the current for conducting a switching tube is reduced, and the resistor RE1 consumes the current released by the capacitor CA3, so that the effect of acting on-off feedback of the transformer is hindered.
Fig. 3 is a waveform diagram of an oscillation signal according to an embodiment of the present invention, where at the time of power-on, the energy storage element is charged, the triode is turned on, at the time of the feedback circuit being turned on, the energy storage element is fully charged, and at the time, the oscillation signal transfers energy through the control boost transformer, corresponding to the pulse of the duty cycle in fig. 3. The energy storage element is fully charged, the auxiliary winding of the transformer is induced by magnetic flux to generate counter electromotive force, the energy storage element starts to discharge at this moment, the feedback circuit is not conducted at this moment, no oscillation signal is generated, and energy transfer is not carried out, which corresponds to the intermittence period in fig. 3. The energy storage element and the first resistor form a loop, the first resistor consumes the energy released by the energy storage element, the size of the energy storage element affects the point rush time and the signal passing time, corresponding to the duration of the working period in fig. 3, and the size of the first resistor affects the discharge time and the no-signal working time, corresponding to the duration of the rest period in fig. 3.
In the embodiment, the intermittent oscillation is periodically circulated, the intermittent oscillation is to change an original period to form a new control period, the oscillation time in the process is far longer than the working frequency of the transformer, and the working frequency of the transformer is unchanged, so that a plurality of transformers work and oscillate in one intermittent oscillation time period. Therefore, the secondary output state of the transformer can be changed by adding intermittent oscillation, the working frequency of the transformer is not changed, and the influence on the transformer is avoided.
In an implementation manner of this embodiment, the switch tube is an NPN transistor, and the switch control circuit further includes: and the protection circuit is connected with the switching tube and is used for carrying out current-limiting protection on the base electrode and the collector electrode of the switching tube.
In one example, the protection circuit includes: and the second resistor is connected between the base of the switching tube and an auxiliary winding of a transformer of the feedback circuit and protects the base by current limiting and voltage dividing. This second resistor is a current limiting resistor, see RE2 in fig. 2.
In one example, the protection circuit includes: and the first capacitor is connected between the collector and the emitter of the switching tube and is used for carrying out buffer protection and back-voltage breakdown protection on the switching tube.
In one example, the protection circuit includes: and the voltage stabilizing diode is used for providing starting voltage for the switching tube and performing overvoltage protection on the base electrode of the switching tube. This zener diode is similar with the second resistance, also can play the effect of current-limiting, and the steady voltage secondary tube goes the steady voltage through the electric current, and the electric current is too big or the undersize, can restrict whole circuit, and the second resistance then plays the current-limiting effect through resistance consumption electric current. The voltage stabilizing diode and the second resistor form a current limiting circuit.
As shown in fig. 2, the second resistor QE1, the first capacitor CA1, and the zener diode DE1. RE2 resistance in figure 2 plays the protection to the switch tube control pole for current-limiting bleeder resistor, DE1 is zener diode, switch on for the triode and cut off and provide steady voltage, can not satisfy the steady voltage's of steady voltage when the diode current that flows through voltage not play the steady voltage effect, otherwise then play the steady voltage effect, can normally work for the switch tube and provide opening voltage, and play the effect of protection switch tube control pole excessive pressure, by zener diode's operating characteristic, can let whole oscillation system turn-off completely, prevent that the switch tube is in little on-state. CA1 is triode buffer capacitor, plays a buffer protection and the effect that the back pressure punctures the switch tube for the switch tube. The switching tube is in a low energy consumption state by controlling the transmission time of oscillation, thereby reducing the output power of the circuit. The load circuit can therefore utilize intermittent oscillation control to reduce power consumption.
In an embodiment of this embodiment, in order to reduce the influence of secondary reverse excitation inductance and leakage inductance existing in the current circuit, and the influence of resonance and damped oscillation, an RCD passive circuit or an active absorption circuit may be further provided in the switch control circuit, so as to reduce the influence and realize optimization of the switch control circuit.
In one example, the structure of the RCD passive circuit includes: freewheeling diodes and parallel connected resistor-capacitors. The freewheeling diode is connected in the same manner as the zener diode, DE1 in fig. 2, with one end connected to the collector of QE1 and the other end (in series with a parallel resistor-capacitor) connected in parallel to J1.
By adopting the scheme of the embodiment, an intermittent control mode is formed by the self-vibration flyback boost design and the parallel feedback of the resistance and the capacitance of the feedback circuit, the feedback control changes the time length, the switching times of the power tube in the same time are reduced, the control frequency of the converter is not changed, and the output frequency is reduced. The low-frequency output working state reduces the output power of the circuit, so that the switching tube is in a low-energy consumption state, and the energy consumption of the load circuit is reduced. For example, under the long-term working state of the anion generator of the refrigerator, the energy consumption of the circuit is reduced by an intermittent control mode, and the concentration standard of fresh-keeping and sterilization can be met.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example 2
As shown in fig. 4, according to a second aspect of the present invention, there is provided an anion generator including the switching control circuit described in fig. 1, this embodiment provides an anion generator, and fig. 4 is a block diagram of a structure of an anion generator according to an embodiment of the present invention, the apparatus includes: the device comprises a switch control circuit 40, an input power supply 42 and a load circuit 44, wherein the load circuit is connected with a transformer of the switch control circuit and is used for generating negative ions through high-voltage ionization output by the transformer.
Optionally, the switch control circuit includes: and the feedback circuit is connected between the power supply and the switching tube and used for intermittently controlling the switching state of the switching tube through oscillation signals in a feedback manner, and the switching tube is connected with the load circuit.
Optionally, the load circuit comprises a control converter.
Optionally, the feedback circuit includes: the transformer comprises a first resistor, an energy storage element and a transformer, wherein the first resistor and the energy storage element are connected in parallel, the first resistor and the energy storage element are connected in parallel to form a loop, and the transformer comprises an auxiliary winding and a primary winding.
Optionally, the switching tube is an NPN triode, a base of the NPN triode is connected to the auxiliary winding of the transformer to form a feedback, a collector of the NPN triode is connected to the primary winding of the transformer, and an emitter of the NPN triode is grounded.
Optionally, the switch tube is an NPN triode, and the switch control circuit further includes: and the protection circuit is connected with the switching tube and is used for carrying out current-limiting protection on the base electrode and the collector electrode of the switching tube.
Optionally, the protection circuit includes: and the second resistor is connected between the base of the switching tube and an auxiliary winding of a transformer of the feedback circuit and protects the base by current limiting and voltage dividing.
Optionally, the protection circuit includes: and the first capacitor is connected between the collector and the emitter of the switching tube and is used for carrying out buffer protection and back-voltage breakdown protection on the switching tube.
Optionally, the protection circuit includes: and the voltage stabilizing diode is connected between the base electrode of the switching tube and the ground and is used for providing starting voltage for the switching tube and performing overvoltage protection on the base electrode of the switching tube.
Fig. 5 is a logic diagram of the ionizer in this embodiment of the present invention, including: the DC12V input filter, the back voltage protection circuit, the switch control circuit, the feedback control intermittent signal, the boost converter and the high-voltage output. The DC12V input filter is used as a power supply end and is used as the input of the switch control circuit, after the switch control circuit outputs voltage to the boost converter, a feedback control intermittent signal is generated and fed back to the switch control circuit, and a switching tube of the switch control circuit has high-voltage output in a conducting state. The feedback control intermittent signal is generated by an auxiliary winding of the transformer, a capacitor of the feedback circuit and a resistor connected between the base of the switching tube and the auxiliary winding of the transformer of the feedback circuit.
It should be noted that the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
This embodiment provides a refrigerator, and according to a third aspect of the present invention, the present invention provides a refrigerator including the anion generator described in fig. 4.
Optionally, the ionizer includes a switching control circuit as described in fig. 1.
Optionally, the negative ion generator further comprises an input power supply and a load circuit, wherein the load circuit is connected with the transformer of the switch control circuit and is used for generating negative ions through high-voltage ionization output by the transformer.
Optionally, the load circuit comprises a control converter.
Optionally, the switch control circuit includes: and the feedback circuit is connected between the power supply and the switching tube and used for intermittently controlling the switching state of the switching tube through oscillation signals in a feedback manner, and the switching tube is connected with the load circuit.
Optionally, the load circuit comprises a control converter.
Optionally, the feedback circuit includes: the transformer comprises a first resistor, an energy storage element and a transformer, wherein the first resistor and the energy storage element are connected in parallel and form a loop, and the transformer comprises an auxiliary winding and a primary winding.
Optionally, the switching tube is an NPN triode, a base of the NPN triode is connected to the auxiliary winding of the transformer to form a feedback, a collector of the NPN triode is connected to the primary winding of the transformer, and an emitter of the NPN triode is grounded.
Optionally, the switch tube is an NPN triode, and the switch control circuit further includes: and the protection circuit is connected with the switching tube and is used for carrying out current-limiting protection on the base electrode and the collector electrode of the switching tube.
Optionally, the protection circuit includes: and the second resistor is connected between the base of the switching tube and an auxiliary winding of a transformer of the feedback circuit and protects the base by current-limiting and voltage-dividing.
Optionally, the protection circuit includes: and the first capacitor is connected between the collector and the emitter of the switching tube and is used for carrying out buffer protection and back-voltage breakdown protection on the switching tube.
Optionally, the protection circuit includes: and the voltage stabilizing diode is connected between the base electrode of the switching tube and the ground and is used for providing starting voltage for the switching tube and performing overvoltage protection on the base electrode of the switching tube.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A switch control circuit, comprising:
and the feedback circuit is connected between the power supply and the switching tube and used for controlling the switching state of the switching tube through intermittent feedback of an oscillation signal, and the switching tube is connected with the load circuit.
2. The circuit of claim 1, wherein the feedback circuit comprises: the transformer comprises a first resistor, an energy storage element and a transformer, wherein the first resistor and the energy storage element are connected in parallel and form a loop, and the transformer comprises an auxiliary winding and a primary winding.
3. The circuit according to claim 2, wherein the switching tube is an NPN transistor, a base of the NPN transistor is connected to the auxiliary winding of the transformer to form a feedback, a collector of the NPN transistor is connected to the primary winding of the transformer, and an emitter of the NPN transistor is grounded.
4. The circuit of claim 1, wherein the switch transistor is an NPN transistor, and the switch control circuit further comprises: and the protection circuit is connected with the switching tube and is used for carrying out current-limiting protection on the base electrode and the collector electrode of the switching tube.
5. The circuit of claim 4, wherein the protection circuit comprises:
and the second resistor is connected between the base of the switching tube and an auxiliary winding of a transformer of the feedback circuit and protects the base by current limiting and voltage dividing.
6. The circuit of claim 4, wherein the protection circuit comprises:
and the first capacitor is connected between the collector and the emitter of the switching tube and is used for carrying out buffer protection and back-voltage breakdown protection on the switching tube.
7. The circuit of claim 4, wherein the protection circuit comprises: and the voltage stabilizing diode is connected between the base electrode of the switching tube and the ground and is used for providing starting voltage for the switching tube and performing overvoltage protection on the base electrode of the switching tube.
8. An ionizer characterized in that the ionizer comprises the switching control circuit according to any one of claims 1 to 7.
9. The negative ion generator according to claim 8, further comprising: the load circuit is connected with a transformer of the switch control circuit and used for generating negative ions through high-voltage ionization output by the transformer.
10. A refrigerator characterized by comprising the anion generator of claim 8 or 9.
CN202211234878.2A 2022-10-10 2022-10-10 Switch control circuit, anion generator and refrigerator Pending CN115528891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211234878.2A CN115528891A (en) 2022-10-10 2022-10-10 Switch control circuit, anion generator and refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211234878.2A CN115528891A (en) 2022-10-10 2022-10-10 Switch control circuit, anion generator and refrigerator

Publications (1)

Publication Number Publication Date
CN115528891A true CN115528891A (en) 2022-12-27

Family

ID=84701323

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211234878.2A Pending CN115528891A (en) 2022-10-10 2022-10-10 Switch control circuit, anion generator and refrigerator

Country Status (1)

Country Link
CN (1) CN115528891A (en)

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