WO2022027909A1 - Detection circuit and air purification device - Google Patents

Detection circuit and air purification device Download PDF

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Publication number
WO2022027909A1
WO2022027909A1 PCT/CN2020/139936 CN2020139936W WO2022027909A1 WO 2022027909 A1 WO2022027909 A1 WO 2022027909A1 CN 2020139936 W CN2020139936 W CN 2020139936W WO 2022027909 A1 WO2022027909 A1 WO 2022027909A1
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WIPO (PCT)
Prior art keywords
circuit
voltage
pole plate
power supply
pole
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PCT/CN2020/139936
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French (fr)
Chinese (zh)
Inventor
金胜昔
汪春节
胡逢亮
曾森
李绍健
张晓慈
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珠海格力电器股份有限公司
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Publication of WO2022027909A1 publication Critical patent/WO2022027909A1/en

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    • 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

Definitions

  • the application relates to the technical field of household appliances, in particular to a detection circuit and an air purification device.
  • air purifiers usually kill germs in the air by means of high-voltage discharge between the plates.
  • the dust and impurities in the air will gradually accumulate on the plates, which will shorten the relative distance between the plates.
  • the technical problem to be solved by this application is that the dust and impurities in the air existing in the prior art will gradually accumulate on the pole plate, so that the electric field strength between the pole plates becomes larger, and the current flowing through the circuit where the pole plate is located changes. It will seriously affect the service life of the product, and if the user is not aware of it at this time, there will be a problem of dangerous situations.
  • a detection circuit and an air purification device are provided.
  • an embodiment of the present application provides a detection circuit, the detection circuit includes: a sampling circuit, connected in series with one of two adjacent electrode plates; a voltage detection circuit, connected in parallel with the sampling circuit; the voltage A detection circuit is configured to detect the voltage across the sampling circuit.
  • the electrode plate includes a first electrode plate and a second electrode plate that are arranged adjacently;
  • the sampling circuit includes a first sampling resistor, and the first sampling resistor is connected in series with the first electrode plate, or with the first electrode plate.
  • the second plates are connected in series.
  • the detection circuit further includes: a first switch, the first switch is connected in series with the first pole plate or in series with the second pole plate.
  • the pole plate further includes a third pole plate and a fourth pole plate arranged adjacently;
  • the sampling circuit further includes a second sampling resistor, and the second sampling resistor is connected in series with the third pole plate, or in series with the fourth plate.
  • the detection circuit further includes: a second switch, the second switch is connected in series with the third electrode plate, or is connected in series with the fourth electrode plate.
  • the present application also provides an air purification device, which includes: the detection circuit described in any one of the above; a power supply circuit, which is connected to the detection circuit and is suitable for supplying power to two adjacent electrode plates.
  • the power supply circuit includes: an AC power supply, whose output voltage amplitude can be adjusted; a voltage doubling circuit, where a first end of the voltage doubling circuit is connected to the positive pole of the AC power supply, and a second end is connected to the positive pole of the AC power supply. connected with the negative pole of the AC power supply; the second pole plate is connected with the voltage doubling circuit, and the first pole plate is connected with the negative pole of the AC power supply through the first sampling resistor; the fourth pole The plate is connected to the voltage doubling circuit, and the third electrode plate is connected to the negative electrode of the AC power supply through the second sampling resistor.
  • the voltage doubling circuit is an eight-folding voltage circuit
  • the second pole plate is connected to a four-folding voltage position of the voltage doubling circuit
  • the fourth pole plate is connected to an eight-folding voltage of the voltage doubling circuit. pressure position.
  • the AC power supply includes: a switch circuit, the control end of the switch circuit is connected to the controller, the first end is connected to a power supply, and the second end is grounded; a transformer, the primary coil of which is set to be connected to the The control end of the switch circuit is connected to the controller, one end of the secondary coil is connected to the first end of the voltage doubling circuit, and the other end of the secondary coil is connected to the second end of the voltage doubling circuit.
  • the AC power supply further includes: a first capacitor, one end of which is connected to the power supply and the other end is grounded; an electrolytic capacitor, one end of which is connected to the power supply and the other end is grounded.
  • the AC power supply further includes: a second capacitor, the first end of which is connected to the power supply, and the second end is connected to the first end of the switch circuit through a third diode;
  • the cathode of the pole tube is connected to the second end of the second capacitor, the anode of the third diode is connected to the first end of the switch circuit; the third resistor is connected in parallel with the second capacitor.
  • the AC power supply further includes: a bias resistor, arranged between the controller and the control terminal of the switch circuit; a first diode, connected in parallel with the bias resistor; the first diode The cathode of the diode is connected to the controller, the anode is connected to the control terminal of the switch circuit; the cathode of the second diode is connected to the controller, and the anode is connected to the second terminal of the switch circuit.
  • the AC power supply further includes: a third capacitor, one end of which 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 embodiment of the present application provides a detection circuit, the detection circuit is set in the air purification device, and the detection circuit includes: a sampling circuit, which is connected in series with one of the two adjacent electrode plates; a voltage detection circuit, which is connected with the The sampling circuits are connected in parallel; the voltage detection circuit is configured to detect the voltage across the sampling circuits.
  • the application also provides an air purification device, the air purification device comprising: any one of the detection circuits; a power supply circuit, connected to the detection circuit, and suitable for supplying power to two adjacent electrode plates .
  • the voltage of the power supply circuit can be manually or automatically controlled to reduce the voltage of the power supply circuit to avoid arcing, discharge, ignition and other phenomena between the plates. play a protective role.
  • the power circuit can also be turned off, and the first and second plates can be cleaned, so as to avoid arcing, discharge, ignition and other phenomena between the plates and prolong the service life of the air purification device.
  • FIG. 1 is a schematic diagram of a detection circuit according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an overall circuit of an air purification device according to an embodiment of the present application.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components, which can be a wireless connection or a wired connection connect.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components, which can be a wireless connection or a wired connection connect.
  • air purifiers are one of the types of people's daily use.
  • air purifiers usually kill germs in the air by means of high-voltage discharge between the plates.
  • the dust and impurities in the air will gradually accumulate on the plates, which will shorten the relative distance between the plates. If the relative distance between the plates is shortened, and the high voltage between the plates of the air purifier is not changed, once the distance between the plates is too close, the electric field strength between the plates will increase, and the electric field will flow through the plates where the plates are located.
  • the current of the circuit becomes larger, so that there will be arcing, discharge, ignition and other phenomena between the plates, which will seriously affect the service life of the product. If the user does not know at this time, there will be a certain dangerous situation.
  • the technical problem to be solved by the present application is that the dust and impurities in the air existing in the prior art will gradually accumulate on the pole plates, so that the electric field strength between the pole plates becomes larger, and the current flowing through the circuit where the pole plates is located becomes larger, Thereby seriously affecting the service life of the product.
  • a detection circuit and an air purification device are provided.
  • an embodiment of the present application provides a detection circuit.
  • the detection circuit is provided in an air purification device.
  • the detection circuit specifically includes a sampling circuit and a voltage detection circuit.
  • the sampling circuit is connected in series between the pole plate and the power supply, and is connected in series with one of the two adjacent pole plates, and the two adjacent pole plates cooperate with each other in the air purification device.
  • One of the two adjacent plates is a discharge electrode and the other is a dust-collecting electrode.
  • the discharge electrode is set to discharge, and the dust-collecting electrode is set to be dust-collecting, and impurities such as dust are adsorbed on the dust-collecting electrode.
  • the voltage detection circuit is connected in parallel with the sampling circuit, and the voltage detection circuit is set to detect the voltage at both ends of the sampling circuit.
  • 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.
  • a rectifier and transformer circuit is usually provided in the air purification device, it is set to rectify and transform the alternating current to form a high-voltage direct current.
  • a flashover occurs between the discharge electrode and the dust collector, a power surge occurs in the rectifier and transformer circuit.
  • the flashover is like an instantaneous short-circuit switch, which induces high-frequency voltage, and may produce an oscillating high voltage. frequency voltage.
  • the components in the circuit are impacted by the high-frequency voltage, which induces a high voltage drop and forms a high voltage difference. Since the working power of each element will increase, the working power of the entire air purification device will also increase suddenly, so that the air purification device is easily burned out.
  • the voltage of the power supply circuit can be manually or automatically controlled to reduce the voltage of the power supply circuit to avoid arcing, discharge, ignition and other phenomena between the plates, and to protect the air purification device.
  • the power circuit can also be turned off to clean the first plate B1 and the second plate B2, so as to avoid arcing, discharge, ignition and other phenomena between the plates, prolong the service life of the air purification device, and avoid burning the air. Purification device to ensure the safe use of users.
  • the electrode plate includes a first electrode plate B1 and a second electrode plate B2, the sampling circuit includes a first sampling resistor R5, and the first sampling resistor R5 is connected in series with the first electrode plate B1, or with the second electrode plate B2 concatenate. As shown in FIG. 1 , the first sampling resistor R5 is connected in series with the second electrode plate B2.
  • the detection circuit is further provided with a first switch K1, which is connected in series with the first pole plate B1 or in series with the second pole plate B2. As shown in FIG. 2 , the first switch K1 and the second pole plate B2 are connected in series.
  • the first switch K1 is in a closed state.
  • the first switch K1 can be turned off, and the first pole plate B1 can be disconnected. and the second plate B2 for cleaning, so as to ensure the safe use of the user.
  • the air purifying device is also provided with adjacent third plate B3 and fourth plate B4, the third plate B3 is connected to the positive pole of the power supply circuit, and the fourth pole plate B4 is connected to the negative pole of the power supply circuit.
  • the sampling circuit further includes a second sampling resistor R6, the second sampling resistor R6 is connected in series with the third electrode plate B3, or is connected in series with the fourth electrode plate B4. As shown in FIG. 1 , the second sampling resistor R6 is connected in series with the fourth polar plate B4.
  • the detection circuit further includes a second switch K2, the second switch K2 is connected in series with the third pole plate B3, or is connected in series with the fourth pole plate B4. As shown in FIG. 2 , the second switch K2 is connected in series with the fourth pole plate B4.
  • the first switch K1 and the second switch K2 may be relays, or may be other switching devices with the same function. Those skilled in the art can replace it according to the actual situation.
  • the user When the user is using, if there is a lot of dust and impurities between the first plate B1 and the second plate B2, the normal use of the air purification device has been affected, and the dust and impurities between the third plate B3 and the fourth plate B4 have been affected. With less dust and impurities, it can operate normally. At this time, the user can turn off the first switch K1 and keep the second switch K2 closed, so as to ensure the normal operation of the air purification device and prevent the entire air purification device from working when one group of the pole plates fails to work. disadvantages.
  • the embodiments of the present application also provide an air purification device, which includes several electrode plate groups, a power supply circuit, and the detection circuit described in the above embodiments.
  • the power supply circuit is connected with the detection circuit and is suitable for supplying power to two adjacent electrode plates.
  • the two adjacent electrode plates are the discharge electrode and the dust collecting electrode respectively.
  • Several pole plate groups are connected in parallel with the power supply circuit, and the pole plate groups include two adjacent pole plates.
  • the power supply circuit includes: an AC power supply and a voltage multiplier circuit.
  • the output voltage amplitude of the AC power supply can be adjusted.
  • the first end of the voltage doubling circuit is connected to the positive pole of the AC power supply, and the second end is connected to the negative pole of the AC power supply.
  • the first pole plate B1 is connected to the voltage doubling circuit, and the second pole plate B2 is connected to the negative pole of the AC power supply through the first sampling resistor R5.
  • the third pole plate B3 is connected to the voltage doubling circuit, and the fourth pole plate B4 is connected to the negative pole of the AC power supply through the second sampling resistor R6.
  • an eight-fold voltage circuit is used in this embodiment.
  • those skilled in the art can change the specific structure and quantity of the voltage doubling circuit according to the actual situation, as long as the effect of voltage boosting can be achieved.
  • the voltage of the power supply circuit can be manually or automatically controlled to reduce the voltage of the power supply circuit to avoid arcing, discharge, ignition and other phenomena between the plates, and to protect the air purification device.
  • the power circuit can also be turned off, and the first plate B1 and the second plate B2 can be cleaned, so as to avoid arcing, discharge, ignition and other phenomena between the plates, prolong the service life of the air purification device, and ensure the user's safety. Safe to use.
  • the initial voltage of the voltage doubler circuit can be 1.5KV or higher, depending on the withstand voltage of the voltage doubler capacitor in the voltage doubler circuit.
  • the voltage doubling circuit itself does not contain chips, which makes the voltage doubling circuit highly versatile.
  • the voltage multiplier circuit itself has its own sampling resistor, which can monitor the working condition of the plate itself in real time. At the same time, the magnitude of the working current in the voltage multiplier 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 is connected with the power supply VCC, and the second end is grounded.
  • the primary coil of the high-frequency transformer T1 is set to connect the control end of the switch circuit with the controller, one end of the secondary coil is connected to the first end of the voltage doubling circuit, and the other end of the secondary coil is connected to the second end of the voltage doubling circuit.
  • the switch circuit can be a triode, a MOS transistor Q1 and other types of switch transistors, which can realize the opening and closing effect.
  • the controller when the switch circuit is the MOS transistor Q1, the controller generates a pwm wave.
  • the MOS transistor Q1 When the pwm wave is at a high level, the MOS transistor Q1 is turned on, and the power supply VCC supplies power to the high-frequency transformer T1.
  • the high-frequency transformer T1 passes through the secondary coil to become The voltage multiplier circuit supplies power; 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.
  • the controller can provide pulse voltage for the high-frequency transformer T1 by generating pwm waves. After the high-frequency transformer T1 is stepped down or boosted, the high-frequency transformer T1 can output AC voltage, thereby inputting the AC voltage into the voltage multiplier circuit.
  • the controller can control the pwm wave to reduce the duty cycle, thereby reducing the AC voltage generated by the high-frequency transformer T1, thereby reducing the times
  • the voltage of the voltage circuit thereby reducing the voltage between the first plate B1 and the second plate B2 and the voltage between the third plate B3 and the fourth plate B4, to avoid arcing, discharge, and ignition between the plates. and other phenomena, play a protective role in the air purification device.
  • the sampling circuit and the controller can be electrically connected, or when the user sees that the voltage of the sampling circuit is too high, the controller can be manually controlled to protect the air purification device.
  • the pwm wave can also not be generated by the controller, so that there is no voltage between the first pole plate B1 and the second pole plate B2, between the third pole plate B3 and the fourth pole plate B4, and the first pole plate B1 and the The second pole plate B2, the third pole plate B3 and the fourth pole plate B4 do not work at this time.
  • the user can then remove the first electrode plate B1 and the second electrode plate B2, the third electrode plate B3 and the fourth electrode plate B4 from the detection circuit or from the air purification device for cleaning to ensure the normal operation of the air purification device. In this way, the phenomenon of arcing, discharge, and ignition between the plates is avoided, and the service life of the air purification device is prolonged, thereby ensuring the safe use of the user.
  • the voltage detection circuit is more direct and accurate because it directly detects the current on the secondary side of the high-frequency transformer T1. In addition, the voltage detection circuit does not need to undergo oscillation, the interference is small, and the detection is simpler.
  • the detection circuit further includes a first capacitor C1 and an electrolytic capacitor EC1.
  • 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 the power supply VCC, and the other end is grounded.
  • the first capacitor C1 can filter out high frequency signals, and the electrolytic capacitor EC1 is set to filter out low frequency signals.
  • the detection circuit further includes a second capacitor C2, a third diode D3 and a third resistor R3.
  • the first end of the second capacitor C2 is connected to the power supply VCC, and the second end of the second capacitor C2 is connected to the first end 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, which is set to absorb the oscillation generated by the high-frequency transformer T1 at the moment when the switching 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 terminal of the switch circuit, the first diode D1 is connected in parallel with the second resistor R2, the cathode of the first diode D1 is connected to the controller, and the anode is connected to the control terminal of the switch circuit connect.
  • the cathode of the second diode D2 is connected to the controller, and the anode is connected to the second end of the switch circuit.
  • the first diode D1 is set to discharge the junction capacitance of the MOS transistor Q1, which can optimize the switching of the MOS transistor Q1.
  • the second diode D2 can protect the IO port of the controller.
  • a third capacitor C3 is further included.
  • 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 configured to absorb electronic noise generated when the switching circuit switches.
  • the detection circuit is also provided with a Zener diode D12, the positive pole of the Zener diode D12 is grounded, and the negative pole is connected to the control terminal of the switch circuit.
  • the detection circuit is also provided with a fourth resistor R4, one end of which is connected to the control end of the switch circuit, and the other end is grounded.
  • the solutions provided by the embodiments of the present application can be set in the control field of air purification equipment, and are suitable for use in environments such as home air purifiers, purification production factories, etc.
  • the embodiments of the present application provide a detection circuit, which is set in the air purification device , the detection circuit includes: a sampling circuit, connected in series with one of the adjacent two pole plates, a voltage detection circuit, connected in parallel with the sampling circuit, and the voltage detection circuit is set to detect the voltage at both ends of the sampling circuit.

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  • General Physics & Mathematics (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Electrostatic Separation (AREA)

Abstract

A detection circuit and an air purification device, the detection circuit comprising: a sampling circuit which is connected in series with one of two adjacent plates; and a voltage detection circuit which is connected in parallel with the sampling circuit, wherein the voltage detection circuit is configured to detect the voltage at two ends of the sampling circuit.

Description

一种检测电路及空气净化装置A detection circuit and air purification device
本申请要求于2020年08月07日提交中国专利局、申请号为202010789897.6、申请名称“一种检测电路及空气净化装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with the application number 202010789897.6 and the application title "A detection circuit and air purification device" filed with the China Patent Office on August 7, 2020, the entire contents of which are incorporated into this application by reference .
技术领域technical field
本申请涉及家用电器技术领域，具体涉及一种检测电路及空气净化装置。The application relates to the technical field of household appliances, in particular to a detection circuit and an air purification device.
背景技术Background technique
随着人们生活水平的提高，许多智能电器走进了人们的生活，空气净化器就是人们日常使用的一种。With the improvement of people's living standards, many smart appliances have entered people's lives, and air purifiers are one of the types of people's daily use.
现有技术中，空气净化器通常会采用极板间高压放电的方式杀死空气中的病菌。然而在长时间的使用过程中，空气中的灰尘和杂质会在极板上慢慢堆积，会使极板间的相对距离变短。In the prior art, air purifiers usually kill germs in the air by means of high-voltage discharge between the plates. However, in the process of long-term use, the dust and impurities in the air will gradually accumulate on the plates, which will shorten the relative distance between the plates.
如果极板间的相对距离变短，而空气净化器设置于极板间的高电压不进行改变的话，一旦极板间距离过近，使得极板间的电场强度变大，流经极板所在电路的电流变大，从而严重影响产品的使用寿命。并且如果用户此时不知情，会有一定的危险情况发生。If the relative distance between the plates is shortened, and the high voltage between the plates of the air purifier is not changed, once the distance between the plates is too close, the electric field strength between the plates will increase, and the electric field will flow through the plates where the plates are located. The current of the circuit becomes larger, which seriously affects the service life of the product. And if the user does not know about it at this time, there will be a certain dangerous situation.
发明内容SUMMARY OF THE INVENTION
因此，本申请要解决的技术问题在于现有技术中存在的空气中的灰尘 和杂质会在极板上慢慢堆积，使得极板间的电场强度变大，流经极板所在电路的电流变大，从而严重影响产品的使用寿命，并且如果用户此时不知情，会有危险情况发生的问题。从而提供一种检测电路及空气净化装置。Therefore, the technical problem to be solved by this application is that the dust and impurities in the air existing in the prior art will gradually accumulate on the pole plate, so that the electric field strength between the pole plates becomes larger, and the current flowing through the circuit where the pole plate is located changes. It will seriously affect the service life of the product, and if the user is not aware of it at this time, there will be a problem of dangerous situations. Thus, a detection circuit and an air purification device are provided.
为实现上述目的，本申请实施例提供了一种检测电路，该检测电路包括：采样电路，与相邻两个极板的其中一个串联；电压检测电路，与所述采样电路并联；所述电压检测电路设置为检测所述采样电路两端的电压。To achieve the above purpose, an embodiment of the present application provides a detection circuit, the detection circuit includes: a sampling circuit, connected in series with one of two adjacent electrode plates; a voltage detection circuit, connected in parallel with the sampling circuit; the voltage A detection circuit is configured to detect the voltage across the sampling circuit.
可选地，所述极板包括相邻设置的第一极板和第二极板；所述采样电路包括第一采样电阻，所述第一采样电阻与所述第一极板串联，或与所述第二极板串联。Optionally, the electrode plate includes a first electrode plate and a second electrode plate that are arranged adjacently; the sampling circuit includes a first sampling resistor, and the first sampling resistor is connected in series with the first electrode plate, or with the first electrode plate. The second plates are connected in series.
可选地，该检测电路还包括：第一开关，所述第一开关与所述第一极板串联或与所述第二极板串联。Optionally, the detection circuit further includes: a first switch, the first switch is connected in series with the first pole plate or in series with the second pole plate.
可选地，所述极板还包括相邻设置的第三极板和第四极板；所述采样电路还包括第二采样电阻，所述第二采样电阻与所述第三极板串联，或与所述第四极板串联。Optionally, the pole plate further includes a third pole plate and a fourth pole plate arranged adjacently; the sampling circuit further includes a second sampling resistor, and the second sampling resistor is connected in series with the third pole plate, or in series with the fourth plate.
可选地，该检测电路还包括：第二开关，所述第二开关与所述第三极板串联，或者，与所述第四极板串联。Optionally, the detection circuit further includes: a second switch, the second switch is connected in series with the third electrode plate, or is connected in series with the fourth electrode plate.
本申请还提供了一种空气净化装置，该空气净化装置包括：上述任一项所述的检测电路；电源电路，与所述检测电路连接，并适于为相邻的两个极板供电。The present application also provides an air purification device, which includes: the detection circuit described in any one of the above; a power supply circuit, which is connected to the detection circuit and is suitable for supplying power to two adjacent electrode plates.
可选地，所述电源电路包括：交流电源，所述交流电源的输出电压幅 值可以调节；倍压电路，所述倍压电路的第一端与所述交流电源的正极连接，第二端与所述交流电源的负极连接；所述第二极板与所述倍压电路连接，所述第一极板通过所述第一采样电阻与所述交流电源的负极连接；所述第四极板与所述倍压电路连接，所述第三极板通过所述第二采样电阻与所述交流电源的负极连接。Optionally, the power supply circuit includes: an AC power supply, whose output voltage amplitude can be adjusted; a voltage doubling circuit, where a first end of the voltage doubling circuit is connected to the positive pole of the AC power supply, and a second end is connected to the positive pole of the AC power supply. connected with the negative pole of the AC power supply; the second pole plate is connected with the voltage doubling circuit, and the first pole plate is connected with the negative pole of the AC power supply through the first sampling resistor; the fourth pole The plate is connected to the voltage doubling circuit, and the third electrode plate is connected to the negative electrode of the AC power supply through the second sampling resistor.
可选地，所述倍压电路为八倍压电路，所述第二极板接至所述倍压电路的四倍压位置；所述第四极板接至所述倍压电路的八倍压位置。Optionally, the voltage doubling circuit is an eight-folding voltage circuit, and the second pole plate is connected to a four-folding voltage position of the voltage doubling circuit; the fourth pole plate is connected to an eight-folding voltage of the voltage doubling circuit. pressure position.
可选地，所述交流电源包括：开关电路，所述开关电路的控制端与控制器连接，第一端接有供电电源，第二端接地；变压器，所述变压器的初级线圈设置为连接所述开关电路的控制端与所述控制器，次级线圈的一端与所述倍压电路的第一端连接，所述次级线圈的另一端与所述倍压电路的第二端连接。Optionally, the AC power supply includes: a switch circuit, the control end of the switch circuit is connected to the controller, the first end is connected to a power supply, and the second end is grounded; a transformer, the primary coil of which is set to be connected to the The control end of the switch circuit is connected to the controller, one end of the secondary coil is connected to the first end of the voltage doubling circuit, and the other end of the secondary coil is connected to the second end of the voltage doubling circuit.
可选地，所述交流电源还包括：第一电容，一端与所述供电电源连接，另一端接地；电解电容，一端与所述供电电源连接，另一端接地。Optionally, the AC power supply further includes: a first capacitor, one end of which is connected to the power supply and the other end is grounded; an electrolytic capacitor, one end of which is connected to the power supply and the other end is grounded.
可选地，所述交流电源还包括：第二电容，第一端与所述供电电源连接，第二端通过第三二极管与所述开关电路的第一端连接；所述第三二极管的负极与所述第二电容的第二端连接，所述第三二极管的正极与所述开关电路的第一端连接；第三电阻，与所述第二电容并联。Optionally, the AC power supply further includes: a second capacitor, the first end of which is connected to the power supply, and the second end is connected to the first end of the switch circuit through a third diode; The cathode of the pole tube is connected to the second end of the second capacitor, the anode of the third diode is connected to the first end of the switch circuit; the third resistor is connected in parallel with the second capacitor.
可选地，所述交流电源还包括：偏置电阻，设置于所述控制器与所述开关电路的控制端之间；第一二极管，与所述偏置电阻并联；所述第一二极管的负极与所述控制器连接，正极与所述开关电路的控制端连接；第二 二极管，负极与所述控制器连接，正极与所述开关电路的第二端连接。Optionally, the AC power supply further includes: a bias resistor, arranged between the controller and the control terminal of the switch circuit; a first diode, connected in parallel with the bias resistor; the first diode The cathode of the diode is connected to the controller, the anode is connected to the control terminal of the switch circuit; the cathode of the second diode is connected to the controller, and the anode is connected to the second terminal of the switch circuit.
可选地，所述交流电源还包括：第三电容，一端与所述开关电路的第一端连接，另一端与所述开关电路的第二端连接。Optionally, the AC power supply further includes: a third capacitor, one end of which is connected to the first end of the switch circuit, and the other end is connected to the second end of the switch circuit.
本申请技术方案与现有技术相比，具有如下优点：Compared with the prior art, the technical solution of the present application has the following advantages:
1.本申请实施例提供了一种检测电路，所述检测电路设置于空气净化装置，所述检测电路包括：采样电路，与相邻两个极板的其中一个串联；电压检测电路，与所述采样电路并联；所述电压检测电路设置为检测所述采样电路两端的电压。1. The embodiment of the present application provides a detection circuit, the detection circuit is set in the air purification device, and the detection circuit includes: a sampling circuit, which is connected in series with one of the two adjacent electrode plates; a voltage detection circuit, which is connected with the The sampling circuits are connected in parallel; the voltage detection circuit is configured to detect the voltage across the sampling circuits.
如此设置，在空气净化装置的长时间使用过程中，由于极板上的灰尘和杂质会变多，使相邻两个极板间的相对距离变短，而极板间距离过近，会使得流经采样电路的电流会变大，使得电压检测电路采集到的电压就会变大。从而使用户能够及时了解到空气净化装置的实际工作情况。In this way, during the long-term use of the air purification device, since the dust and impurities on the pole plates will increase, the relative distance between the two adjacent pole plates will be shortened, and the distance between the pole plates will be too close, which will cause The current flowing through the sampling circuit will become larger, so that the voltage collected by the voltage detection circuit will become larger. Thereby, the user can know the actual working condition of the air purification device in time.
2.本申请还提供了一种空气净化装置，该空气净化装置包括：任一项所述的检测电路；电源电路，与所述检测电路连接，并适于为相邻的两个极板供电。2. The application also provides an air purification device, the air purification device comprising: any one of the detection circuits; a power supply circuit, connected to the detection circuit, and suitable for supplying power to two adjacent electrode plates .
如此设置，当检测电路中的电压检测电路采集到的电压超过阈值时，可以手动或者自动控制减小电源电路的电压，避免极板间出现拉弧、放电、打火等现象，对空气净化装置起到保护作用。还可以将电源电路关闭，对第一极板和第二极板进行清洗，从而避免极板间出现拉弧、放电、打火等现象，延长空气净化装置的使用寿命。In this way, when the voltage collected by the voltage detection circuit in the detection circuit exceeds the threshold value, the voltage of the power supply circuit can be manually or automatically controlled to reduce the voltage of the power supply circuit to avoid arcing, discharge, ignition and other phenomena between the plates. play a protective role. The power circuit can also be turned off, and the first and second plates can be cleaned, so as to avoid arcing, discharge, ignition and other phenomena between the plates and prolong the service life of the air purification device.
附图说明Description of drawings
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施方式，对于本领域普通工人来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. The drawings are some embodiments of the present application. For ordinary workers in the art, other drawings can also be obtained based on these drawings without any creative effort.
图1为本申请实施例检测电路的示意图；1 is a schematic diagram of a detection circuit according to an embodiment of the present application;
图2为本申请实施例空气净化装置整体电路的示意图。FIG. 2 is a schematic diagram of an overall circuit of an air purification device according to an embodiment of the present application.
附图标记：Reference number:
第一采样电阻R5；第二采样电阻R6；The first sampling resistor R5; the second sampling resistor R6;
第一极板B1；第二极板B2；第三极板B3；第四极板B4；The first plate B1; the second plate B2; the third plate B3; the fourth plate B4;
第一开关K1；第二开关K2；The first switch K1; the second switch K2;
供电电源VCC；MOS管Q1；高频变压器T1；Power supply VCC; MOS tube Q1; high frequency transformer T1;
第二电阻R2；第三电阻R3；第四电阻R4；The second resistor R2; the third resistor R3; the fourth resistor R4;
第一电容C1；第二电容C2；第三电容C3；电解电容EC1；The first capacitor C1; the second capacitor C2; the third capacitor C3; the electrolytic capacitor EC1;
第一二极管D1；第二二极管D2；第三二极管D3；稳压二极管D12。The first diode D1; the second diode D2; the third diode D3; the Zener diode D12.
具体实施方式detailed description
下面将结合附图对本申请的技术方案进行清楚、完整地描述，显然， 所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通工人在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary workers in the art without creative work fall within the protection scope of this application.
在本申请的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”仅设置为描述目的，而不能理解为指示或暗示相对重要性。In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first", "second" and "third" are provided for descriptive purposes only and should not be construed to indicate or imply relative importance.
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，还可以是两个元件内部的连通，可以是无线连接，也可以是有线连接。对于本领域的普通工人而言，可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components, which can be a wireless connection or a wired connection connect. For ordinary workers in the art, the specific meanings of the above terms in this application can be understood in specific situations.
此外，下面所描述的本申请不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict with each other.
随着人们生活水平的提高，许多智能电器走进了人们的生活，空气净化器就是人们日常使用的一种。现有技术中，空气净化器通常会采用极板间高压放电的方式杀死空气中的病菌。然而在长时间的使用过程中，空气 中的灰尘和杂质会在极板上慢慢堆积，会使极板间的相对距离变短。如果极板间的相对距离变短，而空气净化器设置于极板间的高电压不进行改变的话，一旦极板间距离过近，使得极板间的电场强度变大，流经极板所在电路的电流变大，从而极板间会出现拉弧、放电、打火等现象，进而严重影响产品的使用寿命。如果用户此时不知情，会有一定的的危险情况发生。本申请要解决的技术问题在于现有技术中存在的空气中的灰尘和杂质会在极板上慢慢堆积，使得极板间的电场强度变大，流经极板所在电路的电流变大，从而严重影响产品的使用寿命的问题。从而提供一种检测电路及空气净化装置。With the improvement of people's living standards, many smart appliances have entered people's lives, and air purifiers are one of the types of people's daily use. In the prior art, air purifiers usually kill germs in the air by means of high-voltage discharge between the plates. However, in the process of long-term use, the dust and impurities in the air will gradually accumulate on the plates, which will shorten the relative distance between the plates. If the relative distance between the plates is shortened, and the high voltage between the plates of the air purifier is not changed, once the distance between the plates is too close, the electric field strength between the plates will increase, and the electric field will flow through the plates where the plates are located. The current of the circuit becomes larger, so that there will be arcing, discharge, ignition and other phenomena between the plates, which will seriously affect the service life of the product. If the user does not know at this time, there will be a certain dangerous situation. The technical problem to be solved by the present application is that the dust and impurities in the air existing in the prior art will gradually accumulate on the pole plates, so that the electric field strength between the pole plates becomes larger, and the current flowing through the circuit where the pole plates is located becomes larger, Thereby seriously affecting the service life of the product. Thus, a detection circuit and an air purification device are provided.
实施例1Example 1
如图1所示，本申请实施例提供了一种检测电路，该检测电路设置于空气净化装置，该检测电路具体包括：采样电路和电压检测电路。As shown in FIG. 1 , an embodiment of the present application provides a detection circuit. The detection circuit is provided in an air purification device. The detection circuit specifically includes a sampling circuit and a voltage detection circuit.
采样电路串联在极板与电源之间，并且与相邻两个极板的其中一个串联，相邻的两个极板在空气净化装置中相互配合工作。相邻的两个极板一个是放电极，一个是集尘极，放电极设置为放电，集尘极设置为集尘，灰尘等杂质都被吸附在集尘极上。电压检测电路与采样电路并联，电压检测电路设置为检测采样电路两端的电压。The sampling circuit is connected in series between the pole plate and the power supply, and is connected in series with one of the two adjacent pole plates, and the two adjacent pole plates cooperate with each other in the air purification device. One of the two adjacent plates is a discharge electrode and the other is a dust-collecting electrode. The discharge electrode is set to discharge, and the dust-collecting electrode is set to be dust-collecting, and impurities such as dust are adsorbed on the dust-collecting electrode. The voltage detection circuit is connected in parallel with the sampling circuit, and the voltage detection circuit is set to detect the voltage at both ends of the sampling circuit.
在空气净化装置的长期使用过程中，容易造成集尘极上的灰尘和杂质过多，而灰尘和杂质过多会使放电极和集尘极之间的相对距离变短。而极板间距离过近，会使放电极与集尘极之间的电场强度变大，从而极间电流会变大。当极板间的距离缩小到一定程度时，放电极与集尘极之间会发生 闪络、火花放电或者电弧放电等现象，使得流经极板间的电流突然增大，并且比正常除尘状态的电流大很多。进而电压检测电路采集到的电压就会比正常工作时的电压较高。During the long-term use of the air purification device, it is easy to cause excessive dust and impurities on the dust collecting electrode, and too much dust and impurities will shorten the relative distance between the discharge electrode and the dust collecting electrode. If the distance between the plates is too short, the electric field strength between the discharge electrode and the dust collecting electrode will increase, so that the current between the electrodes will increase. When the distance between the plates is reduced to a certain extent, flashover, spark discharge or arc discharge will occur between the discharge electrode and the dust collecting electrode, which will cause the current flowing between the plates to increase suddenly, and it will be higher than the normal dust removal state. The current is much larger. Then, the voltage collected by the voltage detection circuit will be higher than the voltage during normal operation.
所以，用户可以通过电压检测电路反馈的电压，能够及时了解到空气净化装置的实际工作情况。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.
并且，由于空气净化装置中通常设置有整流变压电路，设置为将交流电进行整流变压从而形成高压的直流电。在放电极与集尘极之间发生闪络现象时，整流变压电路发生功率浪涌现象，闪络就像瞬间短路不断的开关，感生出高频电压，并且有可能会产生振荡性的高频电压。此时，电路中的元件收到高频电压的冲击，感生出较高的电压降，形成高压差。由于每个元件的工作功率会升高，所以也会使整个空气净化装置的工作功率骤然增大，从而容易烧坏空气净化装置。In addition, since a rectifier and transformer circuit is usually provided in the air purification device, it is set to rectify and transform the alternating current to form a high-voltage direct current. When a flashover occurs between the discharge electrode and the dust collector, a power surge occurs in the rectifier and transformer circuit. The flashover is like an instantaneous short-circuit switch, which induces high-frequency voltage, and may produce an oscillating high voltage. frequency voltage. At this time, the components in the circuit are impacted by the high-frequency voltage, which induces a high voltage drop and forms a high voltage difference. Since the working power of each element will increase, the working power of the entire air purification device will also increase suddenly, so that the air purification device is easily burned out.
所以，当电压检测电路采集到的电压超过阈值时，可以手动或者自动控制减小电源电路的电压，避免极板间出现拉弧、放电、打火等现象，对空气净化装置起到保护作用。还可以将电源电路关闭，对第一极板B1和第二极板B2进行清洗，从而避免极板间出现拉弧、放电、打火等现象，延长空气净化装置的使用寿命，避免烧坏空气净化装置，从而保证用户的安全使用。Therefore, when the voltage collected by the voltage detection circuit exceeds the threshold value, the voltage of the power supply circuit can be manually or automatically controlled to reduce the voltage of the power supply circuit to avoid arcing, discharge, ignition and other phenomena between the plates, and to protect the air purification device. The power circuit can also be turned off to clean the first plate B1 and the second plate B2, so as to avoid arcing, discharge, ignition and other phenomena between the plates, prolong the service life of the air purification device, and avoid burning the air. Purification device to ensure the safe use of users.
在本实施例中，极板包括第一极板B1和第二极板B2，采样电路包括第一采样电阻R5，第一采样电阻R5与第一极板B1串联，或与第二极板B2串联。如图1所示，第一采样电阻R5与第二极板B2串联。In this embodiment, the electrode plate includes a first electrode plate B1 and a second electrode plate B2, the sampling circuit includes a first sampling resistor R5, and the first sampling resistor R5 is connected in series with the first electrode plate B1, or with the second electrode plate B2 concatenate. As shown in FIG. 1 , the first sampling resistor R5 is connected in series with the second electrode plate B2.
该检测电路还设置有第一开关K1，与所述第一极板B1串联或与所述第二极板B2串联。如图2所示，第一开关K1和第二极板B2串联。The detection circuit is further provided with a first switch K1, which is connected in series with the first pole plate B1 or in series with the second pole plate B2. As shown in FIG. 2 , the first switch K1 and the second pole plate B2 are connected in series.
在空气净化装置正常工作过程中，第一开关K1呈闭合状态。当极板上的灰尘和杂质过多，并且通过减小电源电路的电压也无法消除极板间拉弧、放电、打火等现象时，可以断开第一开关K1，对第一极板B1和第二极板B2进行清洗，从而保证用户的安全使用。During the normal operation of the air purification device, the first switch K1 is in a closed state. When there is too much dust and impurities on the pole plate, and the phenomenon of arcing, discharge, and ignition between pole plates cannot be eliminated by reducing the voltage of the power supply circuit, the first switch K1 can be turned off, and the first pole plate B1 can be disconnected. and the second plate B2 for cleaning, so as to ensure the safe use of the user.
当然，空气净化装置还设置有相邻设置的第三极板B3和第四极板B4，第三极板B3与电源电路的正极连接，第四极板B4与电源电路的负极连接。在该检测电路中，采样电路还包括第二采样电阻R6，所述第二采样电阻R6与所述第三极板B3串联，或与所述第四极板B4串联。如图1所示，第二采样电阻R6与第四极板B4串联。Of course, the air purifying device is also provided with adjacent third plate B3 and fourth plate B4, the third plate B3 is connected to the positive pole of the power supply circuit, and the fourth pole plate B4 is connected to the negative pole of the power supply circuit. In the detection circuit, the sampling circuit further includes a second sampling resistor R6, the second sampling resistor R6 is connected in series with the third electrode plate B3, or is connected in series with the fourth electrode plate B4. As shown in FIG. 1 , the second sampling resistor R6 is connected in series with the fourth polar plate B4.
该检测电路还包括第二开关K2，所述第二开关K2与所述第三极板B3串联，或者，与所述第四极板B4串联。如图2所示，第二开关K2与所述第四极板B4串联。The detection circuit further includes a second switch K2, the second switch K2 is connected in series with the third pole plate B3, or is connected in series with the fourth pole plate B4. As shown in FIG. 2 , the second switch K2 is connected in series with the fourth pole plate B4.
本领域技术人员可根据空气净化装置的极板数目调整采样电阻的数目以及开关数目，能够保证空气净化装置的安全运行即可。第一开关K1和第二开关K2可以为继电器，也可以是其他具有相同功能的开关器件。本领域技术人员可根据实际情况进行更换。Those skilled in the art can adjust the number of sampling resistors and the number of switches according to the number of pole plates of the air purification device, so as to ensure the safe operation of the air purification device. The first switch K1 and the second switch K2 may be relays, or may be other switching devices with the same function. Those skilled in the art can replace it according to the actual situation.
在用户使用时，如果第一极板B1和第二极板B2之间的灰尘和杂质非常多，已经影响空气净化装置的正常使用，而第三极板B3和第四极板B4之间的灰尘和杂质较少，能够正常运行。此时，用户可以断开第一开关K1， 保持第二开关K2闭合，从而保证空气净化装置的正常运行，防止空气净化装置因其中一组极板不能工作时，整个空气净化装置就无法工作的弊端。When the user is using, if there is a lot of dust and impurities between the first plate B1 and the second plate B2, the normal use of the air purification device has been affected, and the dust and impurities between the third plate B3 and the fourth plate B4 have been affected. With less dust and impurities, it can operate normally. At this time, the user can turn off the first switch K1 and keep the second switch K2 closed, so as to ensure the normal operation of the air purification device and prevent the entire air purification device from working when one group of the pole plates fails to work. disadvantages.
实施例2Example 2
本申请实施例还提供了一种空气净化装置，包括若干个极板组、电源电路以及上述实施例中所述的检测电路。电源电路与与所述检测电路连接，并适于为相邻的两个极板供电。相邻的两个极板分别为放电极和集尘极。若干个极板组与所述电源电路并联，所述极板组包括相邻的两个极板。The embodiments of the present application also provide an air purification device, which includes several electrode plate groups, a power supply circuit, and the detection circuit described in the above embodiments. The power supply circuit is connected with the detection circuit and is suitable for supplying power to two adjacent electrode plates. The two adjacent electrode plates are the discharge electrode and the dust collecting electrode respectively. Several pole plate groups are connected in parallel with the power supply circuit, and the pole plate groups include two adjacent pole plates.
可选地，在本申请的一些实施例中，电源电路包括：交流电源和倍压电路。交流电源的输出电压幅值可以进行调节，倍压电路的第一端与交流电源的正极连接，第二端与交流电源的负极连接。第一极板B1与倍压电路连接，第二极板B2通过第一采样电阻R5与交流电源的负极连接。第三极板B3与倍压电路连接，第四极板B4通过第二采样电阻R6与交流电源的负极连接。如图2所示，在本实施例中采用八倍压电路。当然，本领域技术人员可根据实际情况对倍压电路的具体结构和数量进行改变，能够实现升压的效果即可。Optionally, in some embodiments of the present application, the power supply circuit includes: an AC power supply and a voltage multiplier circuit. The output voltage amplitude of the AC power supply can be adjusted. The first end of the voltage doubling circuit is connected to the positive pole of the AC power supply, and the second end is connected to the negative pole of the AC power supply. The first pole plate B1 is connected to the voltage doubling circuit, and the second pole plate B2 is connected to the negative pole of the AC power supply through the first sampling resistor R5. The third pole plate B3 is connected to the voltage doubling circuit, and the fourth pole plate B4 is connected to the negative pole of the AC power supply through the second sampling resistor R6. As shown in FIG. 2 , an eight-fold voltage circuit is used in this embodiment. Of course, those skilled in the art can change the specific structure and quantity of the voltage doubling circuit according to the actual situation, as long as the effect of voltage boosting can be achieved.
当电压检测电路采集到的电压超过阈值时，可以手动或者自动控制减小电源电路的电压，避免极板间出现拉弧、放电、打火等现象，对空气净化装置起到保护作用。还可以将电源电路关闭，对第一极板B1和第二极板B2进行清洗，从而避免极板间出现拉弧、放电、打火等现象，延长空气净化装置的使用寿命，从而保证用户的安全使用。When the voltage collected by the voltage detection circuit exceeds the threshold, the voltage of the power supply circuit can be manually or automatically controlled to reduce the voltage of the power supply circuit to avoid arcing, discharge, ignition and other phenomena between the plates, and to protect the air purification device. The power circuit can also be turned off, and the first plate B1 and the second plate B2 can be cleaned, so as to avoid arcing, discharge, ignition and other phenomena between the plates, prolong the service life of the air purification device, and ensure the user's safety. Safe to use.
倍压电路的初始电压可以是1.5KV或者更高，具体取决于倍压电路中 倍压电容的耐压情况。倍压电路本身不含芯片，使得倍压电路通用性强。倍压电路本身自带采样电阻，能够实时监测极板本身的工作情况。同时能够根据采样电阻的电压算出倍压电路中的工作电流的大小。The initial voltage of the voltage doubler circuit can be 1.5KV or higher, depending on the withstand voltage of the voltage doubler capacitor in the voltage doubler circuit. The voltage doubling circuit itself does not contain chips, which makes the voltage doubling circuit highly versatile. The voltage multiplier circuit itself has its own sampling resistor, which can monitor the working condition of the plate itself in real time. At the same time, the magnitude of the working current in the voltage multiplier circuit can be calculated according to the voltage of the sampling resistor.
交流电源包括开关电路和高频变压器T1。开关电路的控制端与控制器连接，第一端接有供电电源VCC，第二端接地。高频变压器T1的初级线圈设置为连接开关电路的控制端与控制器，次级线圈的一端与倍压电路的第一端连接，次级线圈的另一端与倍压电路的第二端连接。开关电路可以为三极管、MOS管Q1以及其他类型的开关管，能够实现开合效果即可。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 is connected with the power supply VCC, and the second end is grounded. The primary coil of the high-frequency transformer T1 is set to connect the control end of the switch circuit with the controller, one end of the secondary coil is connected to the first end of the voltage doubling circuit, and the other end of the secondary coil is connected to the second end of the voltage doubling circuit. The switch circuit can be a triode, a MOS transistor Q1 and other types of switch transistors, which can realize the opening and closing effect.
例如，当开关电路为MOS管Q1时，控制器产生pwm波，当pwm波为高电平时，MOS管Q1导通，供电电源VCC为高频变压器T1供电，高频变压器T1通过次级线圈为倍压电路供电；当pwm波为低电平时，MOS管Q1截止，供电电源VCC无法为高频变压器T1供电。如此，控制器通过产生pwm波，可以为高频变压器T1提供脉冲电压，经过高频变压器T1降压或者升压之后，高频变压器T1可以输出交流电压，从而将交流电压输入倍压电路中。For example, when the switch circuit is the MOS transistor Q1, the controller generates a pwm wave. When the pwm wave is at a high level, the MOS transistor Q1 is turned on, and the power supply VCC supplies power to the high-frequency transformer T1. The high-frequency transformer T1 passes through the secondary coil to become The voltage multiplier circuit supplies power; 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 way, the controller can provide pulse voltage for the high-frequency transformer T1 by generating pwm waves. After the high-frequency transformer T1 is stepped down or boosted, the high-frequency transformer T1 can output AC voltage, thereby inputting the AC voltage into the voltage multiplier circuit.
当采样电路检测到第一极板B1与第二极板B2间的电压过高时，控制器可以控制pwm波减小占空比，从而降低高频变压器T1产生的交流电压，进而减小倍压电路的电压，从而减小第一极板B1与第二极板B2间的电压以及第三极板B3与第四极板B4间的电压，避免极板间出现拉弧、放电、打火等现象，对空气净化装置起到保护作用。采样电路与控制器可以电连接，也可以在用户看到采样电路的电压过高时，人工控制控制器，能够实现对空气净化装置的保护作用即可。When the sampling circuit detects that the voltage between the first plate B1 and the second plate B2 is too high, the controller can control the pwm wave to reduce the duty cycle, thereby reducing the AC voltage generated by the high-frequency transformer T1, thereby reducing the times The voltage of the voltage circuit, thereby reducing the voltage between the first plate B1 and the second plate B2 and the voltage between the third plate B3 and the fourth plate B4, to avoid arcing, discharge, and ignition between the plates. and other phenomena, play a protective role in the air purification device. The sampling circuit and the controller can be electrically connected, or when the user sees that the voltage of the sampling circuit is too high, the controller can be manually controlled to protect the air purification device.
并且，还可以通过控制器不产生pwm波，从而使第一极板B1与第二极板B2之间、第三极板B3与第四极板B4之间没有电压，第一极板B1与第二极板B2、第三极板B3与第四极板B4此时不工作。用户进而可以将第一极板B1与第二极板B2、第三极板B3与第四极板B4从检测电路中或者从空气净化装置中拆卸下来进行清洗，保证空气净化装置的正常工作，从而避免极板间出现拉弧、放电、打火等现象，延长空气净化装置的使用寿命，从而保证用户的安全使用。Moreover, the pwm wave can also not be generated by the controller, so that there is no voltage between the first pole plate B1 and the second pole plate B2, between the third pole plate B3 and the fourth pole plate B4, and the first pole plate B1 and the The second pole plate B2, the third pole plate B3 and the fourth pole plate B4 do not work at this time. The user can then remove the first electrode plate B1 and the second electrode plate B2, the third electrode plate B3 and the fourth electrode plate B4 from the detection circuit or from the air purification device for cleaning to ensure the normal operation of the air purification device. In this way, the phenomenon of arcing, discharge, and ignition between the plates is avoided, and the service life of the air purification device is prolonged, thereby ensuring the safe use of the user.
该电压检测电路由于直接检测高频变压器T1次级侧的电流，更加直接，更加精确。并且，该电压检测电路无需经过振荡，干扰小，检测更简单。The voltage detection circuit is more direct and accurate because it directly detects the current on the secondary side of the high-frequency transformer T1. In addition, the voltage detection circuit does not need to undergo oscillation, the interference is small, and the detection is simpler.
可选地，该检测电路还包括第一电容C1和电解电容EC1。第一电容C1的一端与供电电源VCC连接，另一端接地。电解电容EC1的一端与供电电源VCC连接，另一端接地。第一电容C1可以滤除高频信号，电解电容EC1设置为滤除低频信号。Optionally, the detection circuit further includes a first capacitor C1 and an electrolytic capacitor EC1. 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 the power supply VCC, and the other end is grounded. The first capacitor C1 can filter out high frequency signals, and the electrolytic capacitor EC1 is set to filter out low frequency signals.
该检测电路还包括第二电容C2、第三二极管D3和第三电阻R3。第二电容C2的第一端与供电电源VCC连接，第二电容C2的第二端通过第三二极管D3与开关电路的第一端连接。第三二极管D3的负极与第二电容C2的第二端连接，第三二极管D3的正极与开关电路的第一端连接。第三电阻R3与第二电容C2并联。第二电容C2、第三电阻R3与第三二极管D3组成RCD吸收电路，设置为吸收开关电路在开通瞬间高频变压器T1产生的震荡。The detection circuit further includes a second capacitor C2, a third diode D3 and a third resistor R3. The first end of the second capacitor C2 is connected to the power supply VCC, and the second end of the second capacitor C2 is connected to the first end 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, which is set to absorb the oscillation generated by the high-frequency transformer T1 at the moment when the switching circuit is turned on.
该检测电路还包括第二电阻R2、第一二极管D1和第二二极管D2。第二电阻R2设置于控制器与开关电路的控制端之间，第一二极管D1与第二 电阻R2并联，第一二极管D1的负极与控制器连接，正极与开关电路的控制端连接。第二二极管D2的负极与控制器连接，正极与开关电路的第二端连接。第一二极管D1是设置为泄放MOS管Q1的结电容，可以优化MOS管Q1的开关。第二二极管D2可以保护控制器的IO口。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 terminal of the switch circuit, the first diode D1 is connected in parallel with the second resistor R2, the cathode of the first diode D1 is connected to the controller, and the anode is connected to the control terminal of the switch circuit connect. The cathode of the second diode D2 is connected to the controller, and the anode is connected to the second end of the switch circuit. The first diode D1 is set to discharge the junction capacitance of the MOS transistor Q1, which can optimize the switching of the MOS transistor Q1. The second diode D2 can protect the IO port of the controller.
可选地，在本申请的一些实施例中，还包括第三电容C3，第三电容C3的一端与开关电路的第一端连接，另一端与开关电路的第二端连接。第三电容C3可以设置为吸收开关电路开关时产生的电子噪声。Optionally, in some embodiments of the present application, a third capacitor C3 is further included. 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 configured to absorb electronic noise generated when the switching circuit switches.
该检测电路还设置有稳压二极管D12，稳压二极管D12的正极接地，负极与开关电路的控制端连接。该检测电路还设置有第四电阻R4，一端与开关电路的控制端连接，另一端接地。The detection circuit is also provided with a Zener diode D12, the positive pole of the Zener diode D12 is grounded, and the negative pole is connected to the control terminal of the switch circuit. The detection circuit is also provided with a fourth resistor R4, one end of which is connected to the control end of the switch circuit, and the other end is grounded.
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通工人来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本申请创造的保护范围之中。Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For ordinary workers in the field, changes or changes in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the scope of protection created by the present application.
工业实用性Industrial Applicability
本申请实施例提供的方案可以设置为空气净化设备的控制领域，适设置为家庭空气净化器、净化生产工厂等环境，本申请实施例提供了一种检测电路，检测电路设置于空气净化装置中，检测电路包括：采样电路，与相邻两个极板的其中一个串联，电压检测电路，与采样电路并联，电压检测电路设置为检测采样电路两端的电压。在空气净化装置的长时间使用过 程中，由于极板上的灰尘和杂质会变多，使相邻两个极板间的相对距离变短，而极板间距离过近，会使得流经采样电路的电流会变大，使得电压检测电路采集到的电压就会变大。从而使用户能够及时了解到空气净化装置的实际工作情况。The solutions provided by the embodiments of the present application can be set in the control field of air purification equipment, and are suitable for use in environments such as home air purifiers, purification production factories, etc. The embodiments of the present application provide a detection circuit, which is set in the air purification device , the detection circuit includes: a sampling circuit, connected in series with one of the adjacent two pole plates, a voltage detection circuit, connected in parallel with the sampling circuit, and the voltage detection circuit is set to detect the voltage at both ends of the sampling circuit. During the long-term use of the air purification device, since the dust and impurities on the plate will increase, the relative distance between the two adjacent plates will be shortened, and the distance between the plates is too close, which will cause the flow through the sampling The current of the circuit will become larger, so that the voltage collected by the voltage detection circuit will become larger. Thereby, the user can know the actual working condition of the air purification device in time.

Claims (13)

  1. 一种检测电路，包括：A detection circuit includes:
    采样电路，串联在电源与极板之间，并且与相邻两个所述极板的其中一个串联；a sampling circuit, connected in series between the power supply and the pole plate, and connected in series with one of the two adjacent pole plates;
    电压检测电路，与所述采样电路并联；所述电压检测电路设置为检测所述采样电路两端的电压。A voltage detection circuit is connected in parallel with the sampling circuit; the voltage detection circuit is configured to detect the voltage at both ends of the sampling circuit.
  2. 根据权利要求1所述的检测电路，其中，The detection circuit of claim 1, wherein,
    所述极板包括相邻设置的第一极板(B1)和第二极板(B2)；The pole plate includes a first pole plate (B1) and a second pole plate (B2) that are arranged adjacently;
    所述采样电路包括第一采样电阻(R5)，所述第一采样电阻(R5)与所述第一极板(B1)串联，或与所述第二极板(B2)串联。The sampling circuit includes a first sampling resistor (R5), and the first sampling resistor (R5) is connected in series with the first pole plate (B1) or in series with the second pole plate (B2).
  3. 根据权利要求2所述的检测电路，其中，还包括：第一开关(K1)，所述第一开关(K1)与所述第一极板(B1)串联或与所述第二极板(B2)串联。The detection circuit according to claim 2, further comprising: a first switch (K1), the first switch (K1) is connected in series with the first pole plate (B1) or connected with the second pole plate ( B2) in series.
  4. 根据权利要求3所述的检测电路，其中，The detection circuit of claim 3, wherein,
    所述极板还包括相邻设置的第三极板(B3)和第四极板(B4)；Described pole plate also comprises the adjacent third pole plate (B3) and the fourth pole plate (B4);
    所述采样电路还包括第二采样电阻(R6)，所述第二采样电阻(R6)与所述第三极板(B3)串联，或与所述第四极板(B4)串联。The sampling circuit further includes a second sampling resistor (R6), the second sampling resistor (R6) is connected in series with the third electrode plate (B3), or is connected in series with the fourth electrode plate (B4).
  5. 根据权利要求4所述的检测电路，其中，还包括：The detection circuit of claim 4, further comprising:
    第二开关(K2)，所述第二开关(K2)与所述第三极板(B3)串联，或者，与所述第四极板(B4)串联。A second switch (K2), the second switch (K2) is connected in series with the third pole plate (B3), or is connected in series with the fourth pole plate (B4).
  6. 一种空气净化装置，包括：An air purification device, comprising:
    如权利要求5所述的检测电路；The detection circuit of claim 5;
    电源电路，与所述检测电路连接；a power supply circuit, connected to the detection circuit;
    若干个极板组，与所述电源电路并联；所述极板组包括相邻的两个极板。Several pole plate groups are connected in parallel with the power supply circuit; the pole plate group includes two adjacent pole plates.
  7. 根据权利要求6所述的空气净化装置，其中，The air purification device according to claim 6, wherein,
    所述电源电路包括：交流电源，所述交流电源的输出电压可以调节；倍压电路，所述倍压电路的第一端与所述交流电源的正极连接，第二端与所述交流电源的负极连接；The power supply circuit includes: an alternating current power supply, the output voltage of which can be adjusted; a voltage doubling circuit, the first end of the voltage doubling circuit is connected to the positive pole of the alternating current power supply, and the second end is connected to the positive pole of the alternating current power supply. negative connection;
    所述第一极板(B1)与所述倍压电路连接，所述第二极板(B2)通过所述第一采样电阻(R5)与所述交流电源的负极连接；The first pole plate (B1) is connected with the voltage doubling circuit, and the second pole plate (B2) is connected with the negative pole of the AC power supply through the first sampling resistor (R5);
    所述第三极板(B3)与所述倍压电路连接，所述第四极板(B4)通过所述第二采样电阻(R6)与所述交流电源的负极连接。The third pole plate (B3) is connected to the voltage doubling circuit, and the fourth pole plate (B4) is connected to the negative pole of the AC power supply through the second sampling resistor (R6).
  8. 根据权利要求7所述的空气净化装置，其中，所述倍压电路为八倍压电路，所述第一极板(B1)接至所述倍压电路的四倍压位置，所述第三极板(B3)接至所述倍压电路的八倍压位置。The air purification device according to claim 7, wherein the voltage doubling circuit is an eight doubling circuit, the first electrode plate (B1) is connected to a quadrupling voltage position of the voltage doubling circuit, and the third The pole plate (B3) is connected to the eight times voltage position of the voltage doubler circuit.
  9. 根据权利要求8所述的空气净化装置，其中，所述交流电源包括：The air purification device of claim 8, wherein the AC power source comprises:
    开关电路，所述开关电路的控制端与控制器连接，第一端接有供电电源(VCC)，第二端接地；a switch circuit, the control end of the switch circuit is connected to the controller, the first end is connected with a power supply (VCC), and the second end is grounded;
    高频变压器(T1)，所述高频变压器(T1)的初级线圈设置为连接所述开关电路的控制端与所述控制器，次级线圈的一端与所述倍压电路的第一端连接，所述次级线圈的另一端与所述倍压电路的第二端连接。A high-frequency transformer (T1), the primary coil of the high-frequency transformer (T1) is set to connect the control end of the switch circuit and the controller, and one end of the secondary coil is connected to the first end of the voltage multiplier circuit , the other end of the secondary coil is connected to the second end of the voltage multiplier circuit.
  10. 根据权利要求所9述的空气净化装置，其中，还包括：The air purification device of claim 9, further comprising:
    第一电容(C1)，一端与所述供电电源(VCC)连接，另一端接地；a first capacitor (C1), one end is connected to the power supply (VCC), and the other end is grounded;
    电解电容(EC1)，一端与所述供电电源(VCC)连接，另一端接地。One end of the electrolytic capacitor (EC1) is connected to the power supply (VCC), and the other end is grounded.
  11. 根据权利要求10所述的空气净化装置，其中，还包括：The air purification device of claim 10, further comprising:
    第二电容(C2)，第一端与所述供电电源(VCC)连接，第二端通过第三二极管(D3)与所述开关电路的第一端连接；所述第三二极管(D3)的负极与所述第二电容(C2)的第二端连接，所述第三二极管(D3)的正极与所述开关电路的第一端连接；A second capacitor (C2), the first end is connected to the power supply (VCC), and the second end is connected to the first end of the switch circuit through a third diode (D3); the third diode The negative electrode of (D3) is connected to the second end of the second capacitor (C2), and the positive electrode of the third diode (D3) is connected to the first end of the switching circuit;
    第三电阻(R3)，与所述第二电容(C2)并联。A third resistor (R3) is connected in parallel with the second capacitor (C2).
  12. 根据权利要求9-11任一项所述的空气净化装置，其中，还包括：The air purification device according to any one of claims 9-11, further comprising:
    第二电阻(R2)，设置于所述控制器与所述开关电路的控制端之间；The second resistor (R2) is arranged between the controller and the control terminal of the switch circuit;
    第一二极管(D1)，与所述第二电阻(R2)并联；所述第一二极管(D1)的负极与所述控制器连接，正极与所述开关电路的控制端连接；a first diode (D1), connected in parallel with the second resistor (R2); the cathode of the first diode (D1) is connected to the controller, and the anode is connected to the control terminal of the switch circuit;
    第二二极管(D2)，负极与所述控制器连接，正极与所述开关电路的第二端连接。For the second diode (D2), the cathode is connected to the controller, and the anode is connected to the second end of the switch circuit.
  13. 根据权利要求9-11任一项所述的空气净化装置，其中，还包括：The air purification device according to any one of claims 9-11, further comprising:
    第三电容(C3)，一端与所述开关电路的第一端连接，另一端与所述开关电路的第二端连接。The third capacitor (C3) has one end connected to the first end of the switch circuit, and the other end connected to the second end of the switch circuit.
PCT/CN2020/139936 2020-08-07 2020-12-28 Detection circuit and air purification device WO2022027909A1 (en)

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