CN111812397A - Detection circuit and air purification device - Google Patents
Detection circuit and air purification device Download PDFInfo
- Publication number
- CN111812397A CN111812397A CN202010789897.6A CN202010789897A CN111812397A CN 111812397 A CN111812397 A CN 111812397A CN 202010789897 A CN202010789897 A CN 202010789897A CN 111812397 A CN111812397 A CN 111812397A
- Authority
- CN
- China
- Prior art keywords
- circuit
- plate
- detection circuit
- voltage
- power supply
- 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
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 66
- 238000004887 air purification Methods 0.000 title claims abstract description 36
- 238000005070 sampling Methods 0.000 claims abstract description 52
- 239000003990 capacitor Substances 0.000 claims description 35
- 239000000428 dust Substances 0.000 abstract description 23
- 239000012535 impurity Substances 0.000 abstract description 12
- 238000010891 electric arc Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 230000007774 longterm Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 244000052616 bacterial pathogen Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention discloses a detection circuit and an air purification device, wherein the detection circuit comprises: the sampling circuit is connected with one of the two adjacent polar plates in series; the voltage detection circuit is connected with the sampling circuit in parallel; the voltage detection circuit is used for detecting the voltage at two ends of the sampling circuit. So set up, in air purification device's long-time use, because dust and impurity on the polar plate can become more, make the relative distance between two adjacent polar plates shorten, and the distance is too close between the polar plate, can make the electric current that flows through sampling circuit can the grow for the voltage that voltage detection circuit gathered will grow. Thereby enabling the user to know the actual working condition of the air purification device in time.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a detection circuit and an air purification device.
Background
Along with the improvement of the living standard of people, a plurality of intelligent electric appliances enter the life of people, and the air purifier is a daily use of people.
In the prior art, the air purifier usually adopts a high-voltage discharge mode between polar plates to kill germs in the air. However, during long-term use, dust and impurities in the air can slowly accumulate on the plates, and the relative distance between the plates is shortened.
If the relative distance between the polar plates is shortened, and the high voltage of the air purifier arranged between the polar plates is not changed, once the distance between the polar plates is too close, the electric field intensity between the polar plates is increased, the current flowing through the circuit where the polar plates are positioned is increased, and the service life of the product is seriously influenced. And if the user is not aware of it at this time, a certain dangerous situation may occur.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is that dust and impurities in the air in the prior art can be slowly accumulated on the polar plates, so that the electric field intensity between the polar plates is increased, the current flowing through the circuit where the polar plates are located is increased, the service life of the product is seriously affected, and if a user does not know at this time, a dangerous situation can occur. Thereby providing a detection circuit and an air purification device.
To achieve the above object, an embodiment of the present invention provides a detection circuit, including: the sampling circuit is connected with one of the two adjacent polar plates in series; the voltage detection circuit is connected with the sampling circuit in parallel; the voltage detection circuit is used for detecting the voltage at two ends of the sampling circuit.
Optionally, the polar plates include a first polar plate and a second polar plate which are adjacently arranged; the sampling circuit comprises a first sampling resistor, and the first sampling resistor is connected with the first polar plate in series or connected with the second polar plate in series.
Optionally, the detection circuit further comprises: a first switch in series with the first plate or in series with the second plate.
Optionally, the polar plate further comprises a third polar plate and a fourth polar plate which are adjacently arranged; the sampling circuit further comprises a second sampling resistor, and the second sampling resistor is connected with the third polar plate in series or connected with the fourth polar plate in series.
Optionally, the detection circuit further comprises: and the second switch is connected with the third polar plate in series or connected with the fourth polar plate in series.
The present invention also provides an air purification apparatus, comprising: the detection circuit of any one of the above; and the power supply circuit is connected with the detection circuit and is suitable for supplying power to the two adjacent polar plates.
Optionally, the power supply circuit comprises: the amplitude of the output voltage of the alternating current power supply can be adjusted; the voltage doubling circuit is connected with the positive pole of the alternating current power supply at a first end and connected with the negative pole of the alternating current power supply at a second end; the second polar plate is connected with the voltage doubling circuit, and the first polar plate is connected with the negative electrode of the alternating current power supply through the first sampling resistor; the fourth polar plate is connected with the voltage doubling circuit, and the third polar plate is connected with the negative electrode of the alternating current power supply through the second sampling resistor.
Optionally, the voltage doubling circuit is an eight-voltage doubling circuit, and the second plate is connected to a voltage quadruple position of the voltage doubling circuit; the fourth polar plate is connected to the eight-time voltage position of the voltage doubling circuit.
Optionally, the ac power supply includes: the control end of the switch circuit is connected with the controller, the first end of the switch circuit is connected with a power supply, and the second end of the switch circuit is grounded; and the primary coil of the transformer is used for connecting the control end of the switch circuit with the controller, one end of the secondary coil is connected with the first end of the voltage doubling circuit, and the other end of the secondary coil is connected with the second end of the voltage doubling circuit.
Optionally, the ac power supply further includes: one end of the first capacitor is connected with the power supply, and the other end of the first capacitor is grounded; and one end of the electrolytic capacitor is connected with the power supply, and the other end of the electrolytic capacitor is grounded.
Optionally, the ac power supply further includes: the first end of the second capacitor is connected with the power supply, and the second end of the second capacitor is connected with the first end of the switch circuit through a third diode; the cathode of the third diode is connected with the second end of the second capacitor, and the anode of the third diode is connected with the first end of the switch circuit; and the third resistor is connected with the second capacitor in parallel.
Optionally, the ac power supply further includes: the bias resistor is arranged between the controller and the control end of the switch circuit; a first diode connected in parallel with the bias resistor; the negative electrode of the first diode is connected with the controller, and the positive electrode of the first diode is connected with the control end of the switch circuit; and the cathode of the second diode is connected with the controller, and the anode of the second diode is connected with the second end of the switch circuit.
Optionally, the ac power supply further includes: and one end of the third capacitor is connected with the first end of the switch circuit, and the other end of the third capacitor is connected with the second end of the switch circuit.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the embodiment of the invention provides a detection circuit, which is arranged on an air purification device and comprises: the sampling circuit is connected with one of the two adjacent polar plates in series; the voltage detection circuit is connected with the sampling circuit in parallel; the voltage detection circuit is used for detecting the voltage at two ends of the sampling circuit.
So set up, in air purification device's long-time use, because dust and impurity on the polar plate can become more, make the relative distance between two adjacent polar plates shorten, and the distance is too close between the polar plate, can make the electric current that flows through sampling circuit can the grow for the voltage that voltage detection circuit gathered will grow. Thereby enabling the user to know the actual working condition of the air purification device in time.
2. The present invention also provides an air purification apparatus, comprising: the detection circuit of any one of the above; and the power supply circuit is connected with the detection circuit and is suitable for supplying power to the two adjacent polar plates.
According to the arrangement, when the voltage acquired by the voltage detection circuit in the detection circuit exceeds the threshold value, the voltage of the power supply circuit can be reduced by manual or automatic control, the phenomena of arc discharge, ignition and the like between the polar plates are avoided, and the air purification device is protected. The power supply circuit can be turned off to clean the first polar plate and the second polar plate, so that the phenomena of arc discharge, ignition and the like between the polar plates are avoided, and the service life of the air purification device is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for a worker of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an overall circuit of an air purification device according to an embodiment of the present invention.
Reference numerals:
a first sampling resistor R5; a second sampling resistor R6;
a first plate B1; a second pole plate B2; a third plate B3; a fourth plate B4;
a first switch K1; a second switch K2;
a power supply VCC; a MOS transistor Q1; a high-frequency transformer T1;
a second resistor R2; a third resistor R3; a fourth resistor R4;
a first capacitance C1; a second capacitance C2; a third capacitance C3; an electrolytic capacitor EC 1;
a first diode D1; a second diode D2; a third diode D3; a zener diode D12.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a worker skilled in the art without creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases by a worker of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Along with the improvement of the living standard of people, a plurality of intelligent electric appliances enter the life of people, and the air purifier is a daily use of people. In the prior art, the air purifier usually adopts a high-voltage discharge mode between polar plates to kill germs in the air. However, during long-term use, dust and impurities in the air can slowly accumulate on the plates, and the relative distance between the plates is shortened. If the relative distance between the polar plates is shortened, and the high voltage of the air purifier arranged between the polar plates is not changed, once the distance between the polar plates is too close, the electric field intensity between the polar plates is increased, the current flowing through the circuit where the polar plates are positioned is increased, and the phenomena of arc discharge, ignition and the like can occur between the polar plates, so that the service life of the product is seriously influenced. If the user is not aware of this, certain dangerous situations may occur. The invention aims to solve the technical problem that in the prior art, dust and impurities in air can be slowly accumulated on the polar plates, so that the electric field intensity between the polar plates is increased, and the current flowing through a circuit where the polar plates are positioned is increased, thereby seriously influencing the service life of a product. Thereby providing a detection circuit and an air purification device.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a detection circuit, where the detection circuit is disposed in an air purification apparatus, and the detection circuit specifically includes: a sampling circuit and a voltage detection circuit.
The sampling circuit is connected in series between the polar plate and the power supply and is connected in series with one of two adjacent polar plates, and the two adjacent polar plates work in an air purification device in a matched mode. One of two adjacent polar plates is a discharge electrode, the other is a dust collecting electrode, the discharge electrode is used for discharging, the dust collecting electrode is used for collecting dust, and impurities such as dust are adsorbed on the dust collecting electrode. The voltage detection circuit is connected with the sampling circuit in parallel and is used for detecting the voltage at two ends of the sampling circuit.
During the long-term use of the air cleaning device, excessive dust and impurities on the dust collecting electrode are easily caused, and the relative distance between the discharge electrode and the dust collecting electrode is shortened due to the excessive dust and impurities. When the distance between the electrodes is too short, the electric field strength between the discharge electrode and the dust collecting electrode increases, and the inter-electrode current increases. When the distance between the polar plates is reduced to a certain degree, phenomena such as flashover, spark discharge or arc discharge can occur between the discharge electrode and the dust collecting electrode, so that the current flowing between the polar plates is suddenly increased and is much larger than the current in a normal dust removal state. And the voltage collected by the voltage detection circuit is higher than the voltage in normal operation.
Therefore, the user can know the actual working condition of the air purification device in time through the voltage fed back by the voltage detection circuit.
In addition, the air cleaning apparatus is generally provided with a rectifier/transformer circuit for rectifying and transforming an ac power to form a high-voltage dc power. When a flashover phenomenon occurs between the discharge electrode and the dust collecting electrode, the rectifying and transforming circuit generates a power surge phenomenon, the flashover is like a continuous switch of an instant short circuit, a high-frequency voltage is induced, and an oscillatory high-frequency voltage may be generated. At this time, the elements in the circuit receive the impact of the high frequency voltage, and induce a higher voltage drop, forming a high voltage difference. Since the operating power of each element is increased, the operating power of the entire air cleaning apparatus is also abruptly increased, and thus the air cleaning apparatus is easily burned out.
Therefore, when the voltage acquired by the voltage detection circuit exceeds the threshold value, the voltage of the power supply circuit can be reduced by manual or automatic control, the phenomena of arc discharge, ignition and the like between the polar plates are avoided, and the air purification device is protected. The power circuit can be turned off, and the first polar plate B1 and the second polar plate B2 are cleaned, so that the phenomena of arc discharge, spark strike and the like between the polar plates are avoided, the service life of the air purification device is prolonged, the air purification device is prevented from being burnt out, and the safe use of a user is ensured.
In the embodiment, the polar plates include a first polar plate B1 and a second polar plate B2, the sampling circuit includes a first sampling resistor R5, and the first sampling resistor R5 is connected in series with the first polar plate B1 or in series with the second polar plate B2. As shown in fig. 1, the first sampling resistor R5 is connected in series with the second plate B2.
The detection circuit is also provided with a first switch K1 connected in series with the first plate B1 or in series with the second plate B2. As shown in fig. 2, the first switch K1 and the second plate B2 are connected in series.
During the normal operation of the air cleaning device, the first switch K1 is in a closed state. When the dust and impurities on the polar plate are excessive and the phenomena of arc discharge, ignition and the like between the polar plates cannot be eliminated by reducing the voltage of the power circuit, the first switch K1 can be switched off to clean the first polar plate B1 and the second polar plate B2, so that the safe use of a user is ensured.
Of course, the air purification device is also provided with a third polar plate B3 and a fourth polar plate B4 which are adjacently arranged, the third polar plate B3 is connected with the positive pole of the power circuit, and the fourth polar plate B4 is connected with the negative pole of the power circuit. In the detection circuit, the sampling circuit further comprises a second sampling resistor R6, and the second sampling resistor R6 is connected in series with the third polar plate B3 or the fourth polar plate B4. As shown in fig. 1, the second sampling resistor R6 is connected in series with the fourth plate B4.
The detection circuit further comprises a second switch K2, wherein the second switch K2 is connected in series with the third polar plate B3 or the fourth polar plate B4. As shown in fig. 2, a second switch K2 is connected in series with the fourth plate B4.
The technical personnel in the field can adjust the number of the sampling resistors and the number of the switches according to the number of the polar plates of the air purification device, and can ensure the safe operation of the air purification device. The first switch K1 and the second switch K2 may be relays or other switching devices having the same function. The replacement can be carried out by a person skilled in the art according to the actual situation.
When used by a user, if the dust and impurities between the first pole plate B1 and the second pole plate B2 are very much, the normal use of the air cleaning apparatus has been affected, and the dust and impurities between the third pole plate B3 and the fourth pole plate B4 are less, and the normal operation can be performed. At this moment, the user can open the first switch K1 and keep the second switch K2 closed, so that the normal operation of the air purification device is ensured, and the defect that the whole air purification device cannot work when one group of polar plates cannot work is avoided.
Example 2
The embodiment of the invention also provides an air purification device which comprises a plurality of pole plate groups, a power circuit and the detection circuit in the embodiment. And the power supply circuit is connected with the detection circuit and is suitable for supplying power to the two adjacent polar plates. Two adjacent polar plates are respectively a discharge electrode and a dust collecting electrode. The plurality of polar plate groups are connected with the power circuit in parallel, and each polar plate group comprises two adjacent polar plates.
Optionally, in some embodiments of the invention, the power supply circuit comprises: alternating current power supply and voltage doubling circuit. The output voltage amplitude of the alternating current power supply can be adjusted, the first end of the voltage doubling circuit is connected with the positive pole of the alternating current power supply, and the second end of the voltage doubling circuit is connected with the negative pole of the alternating current power supply. The first polar plate B1 is connected with the voltage doubling circuit, and the second polar plate B2 is connected with the negative pole of the alternating current power supply through a first sampling resistor R5. The third polar plate B3 is connected with the voltage doubling circuit, and the fourth polar plate B4 is connected with the negative pole of the alternating current power supply through a second sampling resistor R6. As shown in fig. 2, an eight-fold voltage circuit is employed in the present embodiment. Of course, those skilled in the art may change the specific structure and number of the voltage doubling circuits according to actual situations, and may achieve the effect of boosting.
When the voltage collected by the voltage detection circuit exceeds the threshold value, the voltage of the power supply circuit can be reduced by manual or automatic control, the phenomena of arc discharge, spark strike and the like between the polar plates are avoided, and the air purification device is protected. The power circuit can be turned off, and the first polar plate B1 and the second polar plate B2 are cleaned, so that the phenomena of arc discharge, spark and the like between the polar plates are avoided, the service life of the air purification device is prolonged, and the safe use of a user is ensured.
The initial voltage of the voltage doubling circuit can be 1.5KV or higher, depending on the withstand voltage of the voltage doubling capacitor in the voltage doubling circuit. The voltage doubling circuit does not contain a chip, so that the voltage doubling circuit is high in universality. The voltage doubling circuit is provided with a sampling resistor, so that the working condition of the polar plate can be monitored in real time. Meanwhile, the magnitude of the working current in the voltage doubling circuit can be calculated according to the voltage of the sampling resistor.
The ac power supply includes a switching circuit and a high-frequency transformer T1. The control end of the switch circuit is connected with the controller, the first end of the switch circuit is connected with a power supply VCC, and the second end of the switch circuit is grounded. The primary coil of the high-frequency transformer T1 is used for connecting the control end of the switch circuit with the controller, one end of the secondary coil is connected with the first end of the voltage doubling circuit, and the other end of the secondary coil is connected with the second end of the voltage doubling circuit. The switching circuit can be a triode, a MOS transistor Q1 and other types of switching tubes, and the opening and closing effect can be achieved.
For example, when the switching circuit is the MOS transistor Q1, the controller generates pwm wave, and when the pwm wave is at high level, the MOS transistor Q1 is turned on, the power supply VCC supplies power to the high-frequency transformer T1, and the high-frequency transformer T1 supplies power to the voltage doubling circuit through the secondary winding; when the pwm wave is at a low level, the MOS transistor Q1 is turned off, and the power supply VCC cannot supply power to the high-frequency transformer T1. In this manner, the controller can supply a pulse voltage to the high frequency transformer T1 by generating pwm wave, and the high frequency transformer T1 can output an ac voltage after stepping down or stepping up through the high frequency transformer T1, thereby inputting the ac voltage into the voltage doubling circuit.
When the sampling circuit detects that the voltage between the first polar plate B1 and the second polar plate B2 is too high, the controller can control pwm waves to reduce the duty ratio, so that the alternating voltage generated by the high-frequency transformer T1 is reduced, the voltage of the voltage doubling circuit is further reduced, the voltage between the first polar plate B1 and the second polar plate B2 and the voltage between the third polar plate B3 and the fourth polar plate B4 are reduced, the phenomena of arc discharge, ignition and the like between the polar plates are avoided, and the air purification device is protected. The sampling circuit can be connected with the controller electrically, and also can be when the user sees that sampling circuit's voltage is too high, manual control controller, can realize the air purification device the guard action can.
In addition, the controller may not generate pwm waves, so that no voltage is applied between the first plate B1 and the second plate B2 and between the third plate B3 and the fourth plate B4, and the first plate B1 and the second plate B2, and the third plate B3 and the fourth plate B4 do not operate. The user can then be with first polar plate B1 and second polar plate B2, third polar plate B3 and fourth polar plate B4 from detection circuitry or from air purification device in the dismantlement wash, guarantee air purification device's normal work to avoid appearing drawing the arc between the polar plate, discharge, phenomenon such as strike sparks, prolong air purification device's life, thereby guarantee user's safe handling.
The voltage detection circuit is more direct and more accurate because the voltage detection circuit directly detects the current of the secondary side of the high-frequency transformer T1. In addition, the voltage detection circuit does not need to be oscillated, interference is small, and detection is simpler.
Optionally, the detection circuit further comprises a first capacitor C1 and an electrolytic capacitor EC 1. One end of the first capacitor C1 is connected to the power supply VCC, and the other end is grounded. One end of the electrolytic capacitor EC1 is connected to a power supply VCC, and the other end is grounded. The first capacitor C1 can filter high frequency signals, and the electrolytic capacitor EC1 is used for filtering low frequency signals.
The detection circuit further includes a second capacitor C2, a third diode D3, and a third resistor R3. A first terminal of the second capacitor C2 is connected to the power supply VCC, and a second terminal of the second capacitor C2 is connected to the first terminal of the switch circuit through the third diode D3. The cathode of the third diode D3 is connected to the second end of the second capacitor C2, and the anode of the third diode D3 is connected to the first end of the switch circuit. The third resistor R3 is connected in parallel with the second capacitor C2. The second capacitor C2, the third resistor R3 and the third diode D3 form an RCD absorption circuit for absorbing the oscillation generated by the high-frequency transformer T1 when the switch circuit is turned on.
The detection circuit further includes a second resistor R2, a first diode D1, and a second diode D2. The second resistor R2 is arranged between the controller and the control end of the switch circuit, the first diode D1 is connected with the second resistor R2 in parallel, the cathode of the first diode D1 is connected with the controller, and the anode is connected with the control end of the switch circuit. The cathode of the second diode D2 is connected to the controller and the anode is connected to the second terminal of the switching circuit. The first diode D1 is a junction capacitor for the bleeder MOS transistor Q1, which may optimize the switching of MOS transistor Q1. The second diode D2 may protect the IO port of the controller.
Optionally, in some embodiments of the present invention, a third capacitor C3 is further included, and one end of the third capacitor C3 is connected to the first end of the switch circuit, and the other end is connected to the second end of the switch circuit. The third capacitor C3 may be used to absorb electronic noise generated when the switching circuit is switched.
The detection circuit is also provided with a voltage stabilizing diode D12, the anode of the voltage stabilizing diode D12 is grounded, and the cathode of the voltage stabilizing diode D12 is connected with the control end of the switch circuit. The detection circuit is also provided with a fourth resistor R4, one end of which is connected with the control end of the switch circuit, and the other end of which is grounded.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Variations and modifications in other variations may occur to those skilled in the art based upon the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (13)
1. A detection circuit, comprising:
the sampling circuit is connected between a power supply and the polar plate in series and is connected with one of the two adjacent polar plates in series;
the voltage detection circuit is connected with the sampling circuit in parallel; the voltage detection circuit is used for detecting the voltage at two ends of the sampling circuit.
2. The detection circuit of claim 1,
the polar plates comprise a first polar plate (B1) and a second polar plate (B2) which are adjacently arranged;
the sampling circuit comprises a first sampling resistor (R5), the first sampling resistor (R5) being in series with the first plate (B1) or in series with the second plate (B2).
3. The detection circuit of claim 2, further comprising: a first switch (K1), the first switch (K1) being in series with the first plate (B1) or in series with the second plate (B2).
4. The detection circuit of claim 3,
the polar plates also comprise a third polar plate (B3) and a fourth polar plate (B4) which are adjacently arranged;
the sampling circuit further comprises a second sampling resistor (R6), the second sampling resistor (R6) being in series with the third plate (B3) or in series with the fourth plate (B4).
5. The detection circuit of claim 4, further comprising:
a second switch (K2), the second switch (K2) being in series with the third plate (B3) or in series with the fourth plate (B4).
6. An air purification apparatus, comprising:
the detection circuit of claim 5;
the power supply circuit is connected with the detection circuit;
a plurality of plate groups connected in parallel with the power circuit; the polar plate group comprises two adjacent polar plates.
7. The detection circuit of claim 6,
the power supply circuit includes: the output voltage of the alternating current power supply can be adjusted; the voltage doubling circuit is connected with the positive pole of the alternating current power supply at a first end and connected with the negative pole of the alternating current power supply at a second end;
the first polar plate (B1) is connected with the voltage doubling circuit, and the second polar plate (B2) is connected with the negative pole of the alternating current power supply through the first sampling resistor (R5);
the third polar plate (B3) is connected with the voltage doubling circuit, and the fourth polar plate (B4) is connected with the negative pole of the alternating current power supply through the second sampling resistor (R6).
8. The detection circuit of claim 7, wherein the voltage doubling circuit is an eight voltage doubling circuit, the first plate (B1) is connected to a quadruple voltage position of the voltage doubling circuit, and the third plate (B3) is connected to the eight voltage doubling position of the voltage doubling circuit.
9. The detection circuit of claim 8, wherein the ac power source comprises:
the control end of the switch circuit is connected with the controller, the first end of the switch circuit is connected with a power supply (VCC), and the second end of the switch circuit is grounded;
a high frequency transformer (T1), a primary coil of the high frequency transformer (T1) is used for connecting the control end of the switch circuit and the controller, one end of a secondary coil is connected with the first end of the voltage doubling circuit, and the other end of the secondary coil is connected with the second end of the voltage doubling circuit.
10. The detection circuit of claim 9, further comprising:
a first capacitor (C1) having one end connected to the power supply (VCC) and the other end grounded;
and one end of the electrolytic capacitor (EC1) is connected with the power supply (VCC), and the other end of the electrolytic capacitor is grounded.
11. The detection circuit of claim 10, further comprising:
a second capacitor (C2), a first terminal of which is connected to the power supply (VCC), and a second terminal of which is connected to the first terminal of the switch circuit via a third diode (D3); the cathode of the third diode (D3) is connected with the second end of the second capacitor (C2), and the anode of the third diode (D3) is connected with the first end of the switch circuit;
a third resistor (R3) connected in parallel with the second capacitor (C2).
12. The detection circuit according to any one of claims 9 to 11, further comprising:
a second resistor (R2) disposed between the controller and the control terminal of the switching circuit;
a first diode (D1) connected in parallel with the second resistor (R2); the negative electrode of the first diode (D1) is connected with the controller, and the positive electrode of the first diode is connected with the control end of the switch circuit;
and a second diode (D2) having a cathode connected to the controller and an anode connected to the second terminal of the switching circuit.
13. The detection circuit according to any one of claims 9 to 11, further comprising:
and a third capacitor (C3) having one end connected to the first end of the switch circuit and the other end connected to the second end of the switch circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010789897.6A CN111812397A (en) | 2020-08-07 | 2020-08-07 | Detection circuit and air purification device |
| PCT/CN2020/139936 WO2022027909A1 (en) | 2020-08-07 | 2020-12-28 | Detection circuit and air purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010789897.6A CN111812397A (en) | 2020-08-07 | 2020-08-07 | Detection circuit and air purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111812397A true CN111812397A (en) | 2020-10-23 |
Family
ID=72863896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010789897.6A Pending CN111812397A (en) | 2020-08-07 | 2020-08-07 | Detection circuit and air purification device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111812397A (en) |
| WO (1) | WO2022027909A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114006546A (en) * | 2021-11-04 | 2022-02-01 | 珠海格力电器股份有限公司 | Current sampling circuit of voltage doubling circuit, control method and air conditioner |
| WO2022027909A1 (en) * | 2020-08-07 | 2022-02-10 | 珠海格力电器股份有限公司 | Detection circuit and air purification device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7833322B2 (en) * | 2006-02-28 | 2010-11-16 | Sharper Image Acquisition Llc | Air treatment apparatus having a voltage control device responsive to current sensing |
| CN103505757B (en) * | 2012-06-30 | 2015-09-30 | 老肯医疗科技股份有限公司 | Plasma air purification-sterilidevice device |
| CN202666041U (en) * | 2012-06-30 | 2013-01-16 | 成都老肯科技股份有限公司 | Plasma air purification sterilizer |
| CN203645574U (en) * | 2013-12-27 | 2014-06-11 | 宝鸡雷博精密工业有限责任公司 | High-voltage electrostatic generation module of electrostatic air cleaner |
| CN105245111B (en) * | 2015-11-13 | 2018-08-17 | 营口营成电子设备有限公司 | A kind of control system of high direct voltage output voltage stabilizing and constant-current supply |
| CN106602903A (en) * | 2016-12-30 | 2017-04-26 | 广东美的制冷设备有限公司 | Air purifier and control device and method of ion generator |
| CN107131613A (en) * | 2017-06-05 | 2017-09-05 | 爱国者电子科技有限公司 | Control method, control system and the VMC of VMC |
| CN107790286A (en) * | 2017-10-24 | 2018-03-13 | 徐州海里奥特环境科技有限公司 | It is a kind of that there is adaptive and self-cleaning function electrostatic precipitator and dust removal method |
| CN108144747A (en) * | 2017-12-20 | 2018-06-12 | 杭州尚斯维雅环境科技有限公司 | A kind of method and air cleaning unit for purifying air |
| CN111812397A (en) * | 2020-08-07 | 2020-10-23 | 珠海格力电器股份有限公司 | Detection circuit and air purification device |
-
2020
- 2020-08-07 CN CN202010789897.6A patent/CN111812397A/en active Pending
- 2020-12-28 WO PCT/CN2020/139936 patent/WO2022027909A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022027909A1 (en) * | 2020-08-07 | 2022-02-10 | 珠海格力电器股份有限公司 | Detection circuit and air purification device |
| CN114006546A (en) * | 2021-11-04 | 2022-02-01 | 珠海格力电器股份有限公司 | Current sampling circuit of voltage doubling circuit, control method and air conditioner |
| CN114006546B (en) * | 2021-11-04 | 2023-08-25 | 珠海格力电器股份有限公司 | Current sampling circuit of voltage boosting circuit, control method and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022027909A1 (en) | 2022-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111812397A (en) | Detection circuit and air purification device | |
| CN212622797U (en) | Detection circuit and air purification device | |
| CN111404416A (en) | Medium-high frequency ozone generator device and control method | |
| US20220240361A1 (en) | Led driving circuit, light tube and illumination device | |
| CN202655123U (en) | High-voltage power supply of flexile and stable electrostatic dust collector | |
| CN113048628B (en) | Control method and control device of ionization purification equipment | |
| CN2518260Y (en) | High voltage and frequency pulse d.c. generator | |
| CN201577031U (en) | High-frequency and high-voltage power supply control circuit | |
| EP2268407B1 (en) | High voltage power supply for electrostatic precipitator | |
| KR101240126B1 (en) | Current blocking circuit and micro pulse system comprising the same | |
| KR101651737B1 (en) | Micro Pulse System Having Function for Restricting Current and Electrostatic Precipitator Using That Micro Pulse System | |
| CN114825258A (en) | Energy-taking power supply for series gap zinc oxide lightning arrester and method thereof | |
| KR200293402Y1 (en) | Arc and over current protective circuit for electric precipitator | |
| CN207732657U (en) | A kind of safety-type Switching Power Supply | |
| CN209501962U (en) | A kind of electric precipitator having energy storage multiplication of voltage function | |
| CN107255346B (en) | Power frequency boosting circuit of fresh air purifying machine | |
| CN111464054A (en) | Direct current switch power supply | |
| CN208094178U (en) | Surge protecting circuit | |
| CN201389493Y (en) | Electrostatic dust removing device | |
| CN201618612U (en) | Control circuit for high-voltage electrostatic oily fume removers | |
| KR200394242Y1 (en) | Electric dust collector having the function of state display | |
| CN220711356U (en) | Hydrogen production power supply control circuit | |
| WO2019134123A1 (en) | Switch power supply circuit | |
| CN216699854U (en) | Drive circuit, inverter and electric equipment | |
| CN213185488U (en) | Protection circuit based on photovoltaic inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |