CN117833031A

CN117833031A - Ion generator and protection method, device and circuit thereof

Info

Publication number: CN117833031A
Application number: CN202211193117.7A
Authority: CN
Inventors: 代光剑
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2024-04-05

Abstract

The embodiment of the application discloses an ionizer, a protection method, a protection device and a protection circuit thereof, wherein the protection method comprises the following steps: acquiring sampling current of a load end of an ion generator; detecting whether the sampling current meets a preset condition; based on the sampling current meeting the preset condition, adopting a protection strategy corresponding to the met preset condition to protect the ion generator, and enabling the ion generator to work continuously. By the embodiment scheme, when the ignition and arcing of the ion generator occur, the ignition and arcing phenomenon is relieved, and the ion generator is kept to work normally.

Description

Ion generator and protection method, device and circuit thereof

Technical Field

The embodiment of the application relates to the technology of electrical equipment, in particular to an ion generator and a protection method, a protection device and a protection circuit thereof.

Background

The current devices for air purification by ionizing air mainly comprise a negative ion generator and a plasma generator. The working principle of the two is that high-voltage electricity is loaded on the electrode with larger curvature radius, and air near the electrode is ionized and excited to generate active substances such as electrons or plasmas. Because the ionized medium is air, the humidity and the cleanliness in the air are different along with the differences of regions, seasons, working environments and the like. Even if a constant voltage and current are supplied to the electrodes, the discharge state changes with the change of the air humidity and the cleanliness. Especially when the air humidity is higher, hair or batting are adhered on the electrode, the arcing and sparking phenomenon can occur when the electrode discharges, and certain potential safety hazard exists. At present, in order to reduce potential safety hazards, when the spark and arc discharge occur, the discharge current can be increased, and at the moment, the high-voltage power supply for supplying power can be designed to detect that the discharge current exceeds the normal working state, so that the device is subjected to power-off protection.

Disclosure of Invention

The embodiment of the application provides an ion generator, a protection method, a protection device and a protection circuit thereof, which can relieve the phenomena of ignition and arc discharge when the ion generator generates the phenomena of ignition and arc discharge and keep the ion generator to work normally.

An embodiment of the present application provides an ionizer protection method, which may include:

acquiring a sampling current of a load end of an ion generator;

detecting whether the sampling current meets a preset condition;

based on the sampling current meeting the preset condition, the ion generator can be protected by adopting a protection strategy corresponding to the met preset condition, and the ion generator can continue to work.

In one embodiment, the protection policy may include, but is not limited to including, at least one of: and switching off a ground end oscillation power supply circuit of the ion generator and/or reducing the power supply voltage of a high-voltage end of the ion generator.

In an embodiment, the detecting whether the sampling current has met a preset condition may include:

detecting whether the sampling current is greater than or equal to a preset current threshold, and determining that the sampling current meets the preset condition under the condition that the sampling current is greater than or equal to the current threshold; under the condition that the sampling current is smaller than the voltage threshold value, the sampling current can be determined to not meet the preset condition; or,

Converting the sampling current into a sampling voltage; detecting whether the sampling voltage is greater than or equal to a preset voltage threshold, and determining that the sampling current meets the preset condition under the condition that the sampling voltage is greater than or equal to the voltage threshold; in the case that the sampling voltage is smaller than the voltage threshold, it may be determined that the sampling current does not satisfy the preset condition.

detecting whether the sampling current is larger than any current value in a preset normal working current range, and determining that the sampling current meets the preset condition under the condition that the obtained sampling current is larger than any current value in the normal working current range; under the condition that the sampling current is not larger than any current value in the normal working current range, the sampling current can be determined to not meet the preset condition; or,

converting the sampling current into a sampling voltage; detecting whether the sampling voltage is larger than any voltage value in a preset normal working voltage range, and determining that the sampling current meets the preset condition under the condition that the sampling voltage is larger than any voltage value in the normal working voltage range; and under the condition that the sampling voltage is not larger than any voltage value in the normal working voltage range, determining that the sampling current does not meet the preset condition.

In an embodiment, the method may further include:

controlling the high-voltage end supply voltage of the ionizer to return to the normal supply voltage under the condition that the sampling voltage returns to the normal working voltage range or the sampling current returns to the normal working current range;

and under the condition that the sampling voltage is smaller than any voltage value in the normal working voltage range or the sampling current is smaller than any current value in the normal working current range, the high-voltage end supply voltage of the ionizer can be controlled to be increased.

The embodiment of the application also provides an ionizer protection device, which can comprise a processor and a computer readable storage medium, wherein the computer readable storage medium stores instructions, and when the instructions are executed by the processor, the ionizer protection method is realized.

The embodiment of the application also provides an ionizer protection circuit, which can comprise:

the current sampling circuit can be used for sampling the current of the load end of the ion generator to obtain sampling current;

a detection circuit which can be set to detect whether the sampling current meets a preset condition;

The protection execution circuit can be set to receive the control signal corresponding to the satisfied preset condition output by the detection circuit when the sampling current has satisfied the preset condition, protect the ion generator according to the control signal, and enable the ion generator to continue to work.

In one embodiment, the detection circuit may include:

a first conversion circuit which may be arranged to convert said sampled current into a sampled voltage;

the first comparison circuit can be used for comparing whether the sampling voltage is larger than or equal to a preset voltage threshold value, and can output a first control signal when the sampling voltage is larger than or equal to the voltage threshold value; when the sampling voltage is smaller than the voltage threshold value, a second control signal can be output.

In one embodiment, the protection execution circuit may include a turn-off on control circuit; the turn-off and turn-on control circuit can be set to control the ground end oscillation power supply circuit of the ionizer to turn off when the first control signal is received; and when the second control signal is received, controlling the ground end oscillation power supply circuit of the ionizer to be started.

In an embodiment, the control signal may include a third control signal; the detection circuit may include:

a second conversion circuit configured to convert the sampling current into a sampling voltage;

the second comparing circuit may be configured to compare whether the sampling voltage is greater than any one of the voltage values within the preset normal operating voltage range, and may output the third control signal when the sampling voltage is greater than any one of the voltage values within the normal operating voltage range.

In one embodiment, the protection execution circuit may include: a high-voltage end power supply voltage control circuit; the high-voltage side supply voltage control circuit may be configured to control the high-voltage side supply voltage of the ionizer to decrease when the third control signal is received.

In an embodiment, the control signal may further include: a fourth control signal and a fifth control signal; the second comparison circuit may be further configured to output a fourth control signal when the sampling voltage is equal to any one of the voltage values within the normal operating voltage range;

the high-voltage end power supply voltage control circuit may be further configured to control the high-voltage end power supply voltage of the ionizer to return to a normal power supply voltage when the fourth control signal is received;

The second comparison circuit may be further configured to output a fifth control signal in a case where the sampling voltage is smaller than any one of the voltage values within the normal operation voltage range;

the high-voltage side supply voltage control circuit may be further configured to control the high-voltage side supply voltage of the ionizer to increase when the fifth control signal is received.

The embodiment of the application also provides an ionizer, which can include: the ion generator protection circuit and/or the ion generator protection device.

Compared with the related art, the method can comprise the steps of obtaining a sampling current of a load end of an ionizer; detecting whether the sampling current meets a preset condition; and based on the sampling current meeting the preset condition, adopting a protection strategy corresponding to the met preset condition to protect the ion generator, and enabling the ion generator to continue to work. By the embodiment scheme, when the ignition and arcing of the ion generator occur, the ignition and arcing phenomenon is relieved, and the ion generator is kept to work normally.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other advantages of the present application may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide an understanding of the technical aspects of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, and not constitute a limitation of the technical aspects of the present application.

FIG. 1 is a flowchart of an ionizer protection method according to an embodiment of the present application;

FIG. 2a is a schematic diagram of an ionizer according to an embodiment of the present disclosure;

FIG. 2b is a schematic side view of an ionizer structure according to an embodiment of the present application;

FIG. 2c is a schematic view of a high voltage electrode of negative ions and plasma in an ionizer according to an embodiment of the present application;

FIG. 3 is a block diagram of an ionizer protection device according to an embodiment of the present application;

FIG. 4 is a block diagram of the ionizer protection circuit according to the embodiment of the present application;

FIG. 5 is a schematic diagram of a first configuration of an ionizer protection circuit according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a second configuration of an ionizer protection circuit according to an embodiment of the present disclosure;

fig. 7 is a block diagram of an ionizer including an ionizer protection circuit according to an embodiment of this application.

Detailed Description

The present application describes a number of embodiments, but the description is illustrative and not limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or in place of any other feature or element of any other embodiment unless specifically limited.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements of the present disclosure may also be combined with any conventional features or elements to form a unique inventive arrangement as defined in the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement as defined in the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.

Furthermore, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

An embodiment of the present application provides a method for protecting an ionizer, as shown in fig. 1, the method may include steps S101 to S103:

s101, acquiring a sampling current of a load end of an ion generator;

s102, detecting whether the sampling current meets a preset condition;

and S103, when the sampling current meets the preset condition, the ion generator can be protected by adopting a protection strategy corresponding to the met preset condition, and the ion generator can continue to work.

In an embodiment, the ionizer of this embodiment may include two parts, namely an electrode assembly and a high voltage power supply, wherein, as shown in fig. 2a, 2B and 2c, the electrode assembly may mainly include a protecting cover 1, a base 2, an anion electrode A3-1, an anion electrode B3-2, a saw tooth 4, a metal strip 5, a conducting wire A6 and a conducting wire B7. The electrode assembly may include a two-part functional region: a first functional region and a second functional region; wherein the first functional region may refer to an anion generating region composed of a 3-1 anion electrode A and a 3-2 anion electrode B; the second functional region may refer to a plasma generation region consisting of the serrations 4 and the metal strip 5. Wherein the negative ion electrode A3-1, the negative ion electrode B3-2 and the saw teeth 4 can be connected together through welding or a wire, and then connected to a high voltage power supply end (shown in figure 2) of the high voltage power supply 8 through a wire B7 to receive the same negative high voltage power (for example, 2-15 KV); the metal strip 5 may be connected to the ground of the same high voltage power supply 8 by a wire A6.

At present, the following 2 common scenes of the ionizer are that the striking of fire and arc occur:

high humidity conditions: under the condition that water films or water drops exist on the discharge electrode and the protective cover, the space electric distance among the three electrodes of the negative ion electrode (3-1, 3-2), the saw tooth 4 and the metal strip 5 is usually shortened, and at the moment, when high-voltage power supply under normal working conditions is still maintained, the high-voltage electrode (the negative ion electrode and the saw tooth 4) and the grounding electrode (the metal strip 5) are electrically broken down, so that a spark arcing phenomenon is formed.

Hair or flossing conditions: under the condition that the hair or the floating flock is adhered to the electrode, the adhered hair or the floating flock and other objects can become the extension of the discharge electrode, so that the actual physical distance between the high-voltage electrode and the grounding electrode is shortened, and when the high-voltage electrode under the normal working condition is provided, the abnormal discharge phenomenon of striking fire and arcing can occur between the high-voltage electrode and the grounding electrode.

At present, the current limiting power-off protection measures commonly adopted by the ionizer can effectively reduce potential safety hazards caused by striking sparks and arcing, but after the ionizer is simply and roughly powered off, the ionizer does not work completely, and the device loses the due dust removal and sterilization effects. At present, after the power-off protection of the ion generator of the product on the market is triggered, the consumer cannot generally perceive that the purchased article cannot exert the function of the consumer, and the product is also a hidden loss.

In an embodiment, the embodiment of the application provides an ion generator with both negative ions and plasma functions, and by acquiring a load end sampling current, a ground end oscillation power supply circuit of the ion generator is turned off and/or a high-voltage end power supply voltage of the ion generator is reduced according to a preset condition met by the sampling current, so that the ion generator can continuously and normally work, and the problem of ignition and arcing is solved on the premise of incomplete power failure.

In an embodiment, when the arcing phenomenon occurs, the discharge current of the ionizer is increased abruptly compared with the current during normal operation, and the protection scheme of the ionizer can be provided according to the characteristic of abnormal change of the current during abnormal discharge of the ionizer.

In one embodiment, the current at the load end of the ionizer may be sampled by a sampling circuit to obtain a sampling current; and detecting the sampling current, and detecting whether the sampling current meets the preset condition, so as to judge whether the current at the load end of the ion generator has corresponding abnormal change according to the judging result, thereby determining whether the current ion generator has abnormal discharge.

converting the sampling current into a sampling voltage;

detecting whether the sampling voltage is greater than or equal to a preset voltage threshold, and determining that the sampling current meets the preset condition under the condition that the sampling voltage is greater than or equal to the voltage threshold; in the case that the sampling voltage is smaller than the voltage threshold, it may be determined that the sampling current does not satisfy the preset condition.

In an embodiment, the sampled current may be directly compared with a preset current threshold, and in the case that the sampled current is greater than or equal to the current threshold, it may be determined that the sampled current has met a preset condition; otherwise, in the case that the sampling current is smaller than the current threshold, it may be determined that the sampling current has not satisfied the preset condition.

In one embodiment, the current threshold is a voltage value that is substantially greater than the normal operating voltage.

In an embodiment, in order to facilitate application of the embodiment of the present application to a hardware circuit, the sampling current may be further converted into a sampling voltage, the sampling voltage is compared with a preset voltage threshold, if the comparison result is that the sampling voltage is greater than or equal to the voltage threshold, it may also be determined that the collected sampling voltage already meets a preset condition, which indicates that an abnormal discharge occurs in the ionizer, and a preset protection policy may be executed at this time; otherwise, if the comparison result is that the sampling voltage is smaller than the voltage threshold, it can be determined that the acquired sampling voltage does not meet the preset condition, which means that the ionizer is not abnormally discharged and is in a normal working state, and no measures can be taken at this time, so that the ionizer can continue to work normally.

In one embodiment, the voltage threshold is a voltage value that is substantially greater than the normal operating voltage.

In an embodiment, the protecting the ionizer by using the protection policy corresponding to the preset condition may include:

the ion generator is protected by turning off a ground terminal oscillation power supply circuit of the ion generator and/or reducing the power supply voltage of a high-voltage terminal of the ion generator.

In an embodiment, when the electrode assembly is in an arc strike abnormality, the high-voltage power supply detects that the discharge current (i.e. the sampling current) is greatly increased, i.e. the sampling current is greater than or equal to the current threshold, or the sampling voltage is greater than or equal to the voltage threshold, when the sampling current is greater than or equal to the current threshold, or the sampling voltage is greater than or equal to the voltage threshold, the ground terminal oscillation power supply circuit in the high-voltage power supply of the ionizer can be turned off, and the ground terminal oscillation power supply circuit forms self-locking, i.e. when the entire ionizer is not powered on again, the ground terminal oscillation power supply circuit is always in a turned-off state, and only the ground terminal oscillation power supply circuit is turned on again until the next time of re-power supply.

In an embodiment, when the ground terminal oscillation power supply circuit is turned off, the high voltage terminal of the high voltage power supply can still supply power normally, the negative ion electrode can still work normally, and dust removal and sterilization effects are exerted, but at the moment, the ground terminal oscillation power supply circuit is turned off, and the ground electrode is not provided, so that the high-low potential difference is not generated in the ion generator, and the phenomena of ignition and arcing are greatly relieved.

In an embodiment, the embodiment scheme of the application can also provide another protection scheme of the ionizer aiming at the characteristic of abnormal change of the current in the abnormal discharge condition of the ionizer.

converting the sampling current into a sampling voltage;

detecting whether the sampling voltage is larger than any voltage value in a preset normal working voltage range, and determining that the sampling current meets the preset condition under the condition that the sampling voltage is larger than any voltage value in the normal working voltage range; and under the condition that the sampling voltage is not larger than any voltage value in the normal working voltage range, determining that the sampling current does not meet the preset condition.

In an embodiment, the sampling current may be directly compared with any current value in a preset normal working current range, and in the case that the sampling current is greater than any current value in the normal working current range, it may be determined that the sampling current has satisfied a preset condition; otherwise, in the case that the sampling current is smaller than or equal to any one of the current values in the normal operating current range, it may be determined that the sampling current has not satisfied the preset condition.

In an embodiment, in order to facilitate application of the embodiment of the present application to a hardware circuit, the sampling current may be further converted into a sampling voltage, the sampling voltage is compared with a preset normal operating voltage, and in a case that the comparison result is that the sampling voltage is greater than any voltage value within the normal operating voltage range, it may also be determined that the collected sampling voltage already meets a preset condition, which indicates that an abnormal discharge occurs in the ionizer at present, and a preset protection policy may be executed at this time; on the contrary, under the condition that the comparison result is that the sampling voltage is smaller than any voltage value in the normal working voltage range, the collected sampling voltage can be determined to not meet the preset condition, so that the ion generator is not abnormally discharged and is in a normal working state, and no measures can be taken at the moment, so that the ion generator can continue to work normally.

In an embodiment, based on the above-mentioned preset condition judgment scheme, the protecting the ionizer by using the protection policy corresponding to the preset condition may also include:

In an embodiment, for the feature that the discharge current of the ionizer increases with the increase of humidity, when the humidity around the ionizer increases, the discharge current of the ionizer increases, and then the sampling current also increases, when the high voltage power supply detects that the discharge current increases (i.e. the sampling current is greater than any current value in the normal working current range), the supply voltage of the high voltage terminal can be reduced, and the discharge intensity is reduced, so that the risk of striking fire and arcing is reduced.

In one embodiment, in the process, the ion generator is not stopped when power is suddenly cut off, but the discharge current is changed due to humidity, the power supply voltage of the high-voltage end is controlled in a feedback mode through collecting the discharge current signal, the discharge intensity is adjusted, the purpose of controlling the risk of striking sparks and arcing is achieved, and in the process, the ion generator does not stop working, the dust removal and sterilization effects can be still achieved, and only the capability is weakened.

In an embodiment, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply voltage of the ionizer may be controlled to gradually decrease until the high-voltage end supply voltage is reduced to 0 as the value of the sampling voltage increases relative to the voltage value in the normal operating voltage range.

In an embodiment, similarly, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply voltage of the ionizer may be controlled to gradually decrease until the high-voltage end supply voltage is reduced to 0 as the value of the sampling current increases relative to the current value in the normal working current range.

In an embodiment, the current curve or the change slope of the voltage curve when the power supply voltage of the high voltage terminal is reduced may be defined according to different application scenarios, which is not limited in detail herein.

In an embodiment, the method may further include:

controlling the high-voltage end supply voltage of the ionizer to return to the normal supply voltage range under the condition that the sampling voltage returns to the normal working voltage range or the sampling current returns to the normal working current range;

and under the condition that the sampling voltage is smaller than any current value in the normal working voltage range or the sampling current is smaller than any current value in the normal working current range, the high-voltage end supply voltage of the ionizer can be controlled to be increased.

In one embodiment, when wind blows around the ionizer or additional means such as dehumidification are implemented, after the moisture on the surface of the ionizer is reduced, the discharge current is reduced, and accordingly the sampling current is also reduced, at this time, the high voltage end supply voltage can be reversely adjusted, for example, if the sampling voltage returns to the normal working voltage, the high voltage end supply voltage of the ionizer can be controlled to return to the normal supply voltage; if the sampling voltage is reduced to be smaller than any current value in the normal working voltage range, the high-voltage end supply voltage of the ionizer can be controlled to be gradually increased.

In an embodiment, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply voltage of the ionizer may be controlled to be gradually increased along with increasing values of the sampling voltage relative to the voltage value in the normal working voltage range until the high-voltage end supply voltage is increased to a preset upper limit threshold value of the supply voltage.

In an embodiment, similarly, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply current of the ionizer may be controlled to be gradually increased until a preset upper limit threshold value of the supply current is increased as the value of the sampling current increased relative to the current value in the normal working current range is larger and larger.

In an embodiment, the slope of the current curve or the voltage curve when the high-voltage side power supply voltage increases can be defined according to different application scenarios, and the detailed limitation is not made here.

The embodiment of the present application further provides an ionizer protection device 11, as shown in fig. 3, may include a processor 111 and a computer readable storage medium 112, where the computer readable storage medium 112 stores instructions, and when the instructions are executed by the processor 111, the above-mentioned ionizer protection method is implemented.

In an embodiment, the above-mentioned method for protecting the ionizer may be implemented by software, and any embodiment of the method for protecting the ionizer is applicable to the embodiment of the device 11, which is not described herein.

The present embodiment also provides an ionizer protection circuit 22, as shown in fig. 4, which may include:

the current sampling circuit 221 may be configured to sample a current at a load end of the ionizer to obtain a sampling current;

a detection circuit 222, which may be configured to detect whether the sampling current has met a preset condition;

the protection execution circuit 223 may be configured to receive a control signal corresponding to the satisfied preset condition output by the detection circuit when the sampling current has satisfied the preset condition, protect the ionizer according to the control signal, and enable the ionizer to continue to operate.

In an embodiment, it may still be based on an ionizer as shown in fig. 2a, 2b, 2 c.

In one embodiment, the current sampling circuit 221 may first obtain the sampling current of the load end of the ionizer; and the detection circuit 222 detects the sampling current, and detects whether the sampling current meets the preset condition, so as to judge whether the current at the load end of the ion generator has corresponding abnormal change according to the judging result, thereby determining whether the current ion generator has abnormal discharge.

In one embodiment, as shown in fig. 5, the control signals include a first control signal and a second control signal; the detection circuit 222 may include:

the first conversion circuit 2221 may be configured to convert the sampling current into a sampling voltage;

the first comparison circuit 2222 may be configured to compare whether the sampling voltage is greater than or equal to a preset voltage threshold, and may output a first control signal when the sampling voltage is greater than or equal to the voltage threshold; when the sampling voltage is smaller than the voltage threshold value, a second control signal can be output.

In an embodiment, detailed circuit structures of the first conversion circuit 2221 and the first comparison circuit 2222 are not limited, and any applicable conversion circuit and comparison circuit, or conversion chip and comparison chip may be applied to the embodiments of the present application.

In an embodiment, the first comparing circuit 2222 may compare the sampled voltage with a preset voltage threshold, and if the comparison result is that the sampled voltage is greater than or equal to the voltage threshold, it may also determine that the collected sampled voltage has met a preset condition, which indicates that the ionizer is currently discharging abnormally, and may output a first control signal at this time, so that a subsequent circuit (turn-off control circuit) may execute a corresponding protection policy according to the first control signal; otherwise, if the comparison result is that the sampling voltage is smaller than the voltage threshold, it can be determined that the acquired sampling voltage does not meet the preset condition, which means that the ionizer does not generate abnormal discharge, at this time, a second control signal can be output, so that the ionizer is in a normal working state, at this time, no measures can be taken, and the ionizer can continue to work normally.

In an embodiment, the first control signal and the second control signal may be high or low.

In an embodiment, the protection execution circuit 223 may include a turn-off on control circuit 2231; the turn-off/on control circuit 2231 may be configured to control the ground oscillating power supply circuit 21 of the ionizer to turn off when receiving the first control signal; and when the second control signal is received, controlling the ground end oscillation power supply circuit 21 of the ionizer to be started.

In an embodiment, when the electrode assembly is abnormal in ignition and arc discharge, the first comparing circuit 2222 detects that the discharge current (i.e. the sampling current) is increased, i.e. the sampling current is greater than or equal to the current threshold, the sampling voltage is greater than or equal to the voltage threshold, and when the first comparing circuit 2222 detects that the sampling current is greater than or equal to the current threshold, or the sampling voltage is greater than or equal to the voltage threshold, the ground terminal oscillation power supply circuit 21 in the high voltage power supply of the ionizer can be turned off, and the ground terminal oscillation power supply circuit 21 forms self-locking, i.e. when the entire ionizer is not powered up again, the ground terminal oscillation power supply circuit is always in an off state, and the ground terminal oscillation power supply circuit 21 can be turned on again only until the next time of re-powering.

In an embodiment, under the condition that the ground terminal oscillation power supply circuit 21 is turned off, the high voltage terminal of the high voltage power supply can still supply power normally, the negative ion electrode can still work normally, and the dust removal and sterilization effects are exerted, but at the moment, the ground terminal oscillation power supply circuit is turned off, and the ground electrode is not provided, so that the high-low potential difference in the ionizer is not provided, and the phenomena of ignition and arcing are greatly relieved.

In an embodiment, the embodiment scheme of the application can also provide another protection scheme of the ionizer aiming at the characteristic of abnormal change of the current during the abnormal discharge of the ionizer.

In an embodiment, the control signal may further include a third control signal; as shown in fig. 6, the detection circuit 222 may include:

the second conversion circuit 2223 may be configured to convert the sampling current into a sampling voltage;

the second comparing circuit 2224 may be configured to compare whether the sampling voltage is greater than any voltage value in a preset normal operating voltage range, and may output the third control signal when the sampling voltage is greater than any voltage value in the normal operating voltage range.

In an embodiment, the high-side supply voltage control circuit 2232 may be configured to control the high-side supply voltage of the ionizer to decrease when the third control signal is received.

In an embodiment, the sampling current may be converted into a sampling voltage by the second conversion circuit 2223, the sampling voltage is compared with any voltage value in a preset normal working voltage range by the second comparison circuit 2224, if the comparison result is that the sampling voltage is greater than any voltage value in the normal working voltage range, it may also be determined that the collected sampling voltage already meets a preset condition, which indicates that the ionizer has abnormal discharge, at this time, a third control signal may be sent out, and the high-side supply voltage control circuit 2232 may control the high-side supply voltage of the ionizer to decrease; otherwise, if the comparison result is that the sampled voltage is smaller than or equal to any voltage value in the normal working voltage range, it can be determined that the sampled voltage does not meet the preset condition, which indicates that the ionizer does not generate abnormal discharge, and the high voltage side power supply voltage control circuit 2232 can be further controlled according to the condition that the sampled voltage is equal to or smaller than any voltage value in the normal working voltage range.

In an embodiment, for the feature that the ionizer discharge current increases with the increase of humidity, when the humidity around the ionizer increases, the ionizer discharge current increases, and then the sampling current also increases, when the high voltage power supply detects that the discharge current increases (i.e. the sampling current is greater than the normal working current), the high voltage end supply voltage can be reduced, and the discharge intensity is reduced, so that the risk of striking fire and arcing is reduced.

In an embodiment, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply voltage of the ionizer may be controlled to gradually decrease until the high-voltage end supply voltage is reduced to 0 as the value of the sampling voltage greater than the voltage value in the normal working voltage gradually increases.

In an embodiment, the slope of the voltage curve when the high-voltage end power supply voltage decreases can be defined according to different application scenarios, and the method is not limited in detail herein.

In an embodiment, the control signals may further include a fourth control signal and a fifth control signal; the second comparing circuit 2224 may be further configured to output a fourth control signal when the sampling voltage is equal to the normal operation voltage;

the high-voltage-side supply voltage control circuit 2232 may be further configured to control the high-voltage-side supply voltage of the ionizer to return to within a normal supply voltage range when the fourth control signal is received;

the second comparing circuit 2224 may be further configured to output a fifth control signal in the case where the sampling voltage is smaller than any one of the voltage values in the normal operation voltage range;

the high-side supply voltage control circuit 2232 may be further configured to control the high-side supply voltage of the ionizer to increase in response to receiving the fifth control signal.

In one embodiment, when wind blows around the ionizer or additional means such as dehumidification are implemented, after the moisture on the surface of the ionizer is reduced, the discharge current is reduced, and accordingly the sampling current is also reduced, at this time, the high voltage end supply voltage can be reversely adjusted, for example, if the sampling voltage returns to the normal working voltage, the high voltage end supply voltage of the ionizer can be controlled to return to the normal supply voltage; if the sampling voltage is reduced to be smaller than the normal working voltage, the high-voltage end supply voltage of the ionizer can be controlled to be gradually increased.

In an embodiment, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply voltage of the ionizer may be controlled to be gradually increased along with the fact that the sampled voltage is smaller than the value in the normal working voltage range until the high-voltage end supply voltage is increased to a preset upper limit threshold value of the supply voltage.

In an embodiment, similarly, in order to accurately control the high-voltage end supply voltage, the high-voltage end supply current of the ionizer may be controlled to be gradually increased along with the gradual increase of the value of the sampling current within the range smaller than the normal working current until the value of the sampling current is increased to a preset upper limit threshold of the supply current.

The embodiment of the present application further provides an ionizer M, as shown in fig. 7, may include: the ionizer protection circuit 22 and/or the ionizer protection device 11.

In an embodiment, any of the foregoing protection methods of the ionizer may be applied to the ionizer M, and will not be described herein.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

Claims

1. A method of ionizer protection, the method comprising:

acquiring sampling current of a load end of an ion generator;

detecting whether the sampling current meets a preset condition;

and based on the sampling current meeting the preset condition, adopting a protection strategy corresponding to the met preset condition to protect the ion generator, and enabling the ion generator to continue to work.

2. The ionizer protection method of claim 1, wherein said protection strategy comprises at least one of:

turning off a ground end oscillation power supply circuit of the ion generator; the method comprises the steps of,

and reducing the power supply voltage of the high-voltage end of the ionizer.

3. The ionizer protection method according to claim 2, wherein said detecting whether said sampling current satisfies a preset condition comprises:

detecting whether the sampling current is greater than or equal to a preset current threshold, and determining that the sampling current meets the preset condition based on the sampling current being greater than or equal to the current threshold; determining that the sampling current does not meet the preset condition based on the sampling current being less than the voltage threshold; or,

Converting the sampling current into a sampling voltage; detecting whether the sampling voltage is larger than or equal to a preset voltage threshold value, and determining that the sampling current meets the preset condition based on the fact that the sampling voltage is larger than or equal to the voltage threshold value; and determining that the sampling current does not meet the preset condition based on the sampling voltage being smaller than the voltage threshold.

4. The ionizer protection method according to claim 2, wherein said detecting whether said sampling current satisfies a preset condition comprises:

detecting whether the sampling current is larger than any current value in a preset normal working current range, and determining that the sampling current meets the preset condition based on the fact that the sampling current is larger than any current value in the normal working current range; determining that the sampling current does not meet the preset condition based on the sampling current not being greater than any current value in the normal working current range; or,

converting the sampling current into a sampling voltage; detecting whether the sampling voltage is larger than any voltage value in a preset normal working voltage range, and determining that the sampling current meets the preset condition when the sampling voltage is larger than any voltage value in the normal working voltage range; and when the sampling voltage is not larger than any voltage value in the normal working voltage range, determining that the sampling current does not meet the preset condition.

5. The ionizer protection method of claim 4, further comprising:

based on the sampling voltage returning to the normal working voltage range, or the sampling current returning to the normal working current range, controlling the high-voltage end supply voltage of the ionizer to return to the normal supply voltage;

and controlling the power supply voltage of the high-voltage end of the ionizer to be increased based on the fact that the sampling voltage is smaller than any voltage value in the normal working voltage range or the sampling current is smaller than any current value in the normal working current range.

6. An ionizer protection device comprising a processor and a computer readable storage medium having instructions stored therein, wherein the instructions, when executed by the processor, implement the ionizer protection method of any of claims 1-5.

7. An ionizer protection circuit, said circuit comprising:

the current sampling circuit is used for sampling the current of the load end of the ionizer to obtain sampling current;

A detection circuit configured to detect whether the sampling current satisfies a preset condition;

and the protection execution circuit is used for receiving a control signal which is output by the detection circuit and corresponds to the satisfied preset condition based on the fact that the sampling current satisfies the preset condition, protecting the ion generator according to the control signal, and enabling the ion generator to continue to work.

8. The ionizer protection circuit of claim 7, wherein the control signals include a first control signal and a second control signal; the detection circuit includes:

a first conversion circuit arranged to convert the sampling current into a sampling voltage;

the first comparison circuit is used for comparing whether the sampling voltage is larger than or equal to a preset voltage threshold value or not, and outputting a first control signal when the sampling voltage is larger than or equal to the voltage threshold value; and outputting a second control signal when the sampling voltage is smaller than the voltage threshold value.

9. The ionizer protection circuit of claim 8, wherein said protection execution circuit comprises an off-on control circuit;

the turn-off and turn-on control circuit is arranged to control the ground end oscillation power supply circuit of the ionizer to turn off when the first control signal is received; and when the second control signal is received, controlling a grounding end oscillation power supply circuit of the ionizer to be started.

10. The ionizer protection circuit of claim 7, wherein the control signals include a third control signal; the detection circuit includes:

and the second comparison circuit is used for comparing whether the sampling voltage is larger than any voltage value in a preset normal working voltage range or not, and outputting a third control signal based on the fact that the sampling voltage is larger than any voltage value in the normal working voltage range.

11. The ionizer protection circuit of claim 10, wherein said protection execution circuit comprises a high side supply voltage control circuit;

the high-voltage end power supply voltage control circuit is used for controlling the high-voltage end power supply voltage of the ionizer to be reduced when the third control signal is received.

12. The ionizer protection circuit of claim 10, wherein said protection execution circuit comprises a high side supply voltage control circuit; the control signals further comprise a fourth control signal and a fifth control signal;

the second comparison circuit is further configured to output the fourth control signal based on the sampled voltage being equal to any one of the voltage values in the normal operating voltage range;

The high-voltage end power supply voltage control circuit is further arranged to control the high-voltage end power supply voltage of the ionizer to return to the normal power supply voltage when receiving the fourth control signal;

a second comparing circuit configured to output the fifth control signal based on the sampling voltage being smaller than any one of the voltage values in the normal operating voltage range;

the high-voltage end power supply voltage control circuit is further configured to control the high-voltage end power supply voltage of the ionizer to increase when the fifth control signal is received.

13. An ionizer, comprising: the ionizer protection device of claim 6, and/or the ionizer protection circuit of any one of claims 7-12.