Working state detection device and electronic equipment

Abstract

The utility model relates to a working state detection device and electronic equipment, relates to circuit technical field, the working state detection device comprises a negative ion generator, a negative ion drive circuit and a detection circuit, the detection circuit comprises a light-emitting assembly, the negative ion generator is connected with the negative ion drive circuit, and the light-emitting assembly is connected with the negative ion drive circuit. The negative ion driving circuit is used for driving the negative ion generator to generate negative ions so as to generate an induced electric field around the negative ion generator; the detection circuit is used for detecting whether the induction electric field exists around the negative ion generator or not and triggering the light-emitting assembly to emit light under the condition that the induction electric field exists around the negative ion generator. According to the working state detection device provided by the utility model, the detection circuit can indicate the negative ion generator to generate negative ions through light emitted by the light-emitting assembly under the condition that the ion generator works normally by detecting the induced electric field around the negative ion generator.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a working state detection device and electronic equipment. Background Art

[0002] A negative ion generator is a device that generates negative air ions. The device processes the input DC or AC power through an electromagnetic interference (EMI) processing circuit and a lightning protection circuit, and then upgrades it to AC high voltage through pulse circuits, overvoltage current limiting, high and low voltage isolation and other lines. It then obtains pure DC negative high voltage after rectification and filtering through special grade electronic materials. The DC negative high voltage is connected to a release tip made of metal or carbon elements, and the DC high voltage at the tip is used to generate high corona, releasing a large number of electrons at a high speed. Electrons cannot exist in the air for a long time and will be immediately captured by oxygen molecules in the air, thereby generating negative air ions.

[0003] Most existing negative ion control circuits are open-loop control, and the negative ion generator is driven only by an external drive. However, when the negative ion generator fails or fails, it is impossible to promptly identify that the negative ion generator does not generate negative ions normally, thereby affecting the user experience. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the utility model provides a working status detection device and an electronic device. The working status detection device can effectively identify whether the negative ion driving circuit is operating normally through the induced electric field around the negative ion driving circuit, and indicate whether the negative ion generator generates negative ions through a light-emitting component.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A working state detection device comprises a negative ion generator, a negative ion driving circuit and a detection circuit, wherein the detection circuit comprises a light emitting component, the negative ion generator is connected to the negative ion driving circuit,

[0007] The negative ion driving circuit is used to drive the negative ion generator to generate negative ions, so as to generate an induced electric field around the negative ion generator;

[0008] The detection circuit is used to detect whether the induced electric field exists around the negative ion generator, and trigger the light-emitting component to emit light when the induced electric field is detected around the negative ion generator.

[0009] Furthermore, the detection circuit is arranged within a preset range of the ion driving circuit.

[0010] Furthermore, the detection circuit also includes a first bidirectional transient voltage suppressor (TVS) tube, and the light-emitting component includes a light-emitting diode (LED); one end of the first bidirectional TVS tube is connected to the positive electrode of the LED, and the other end of the first bidirectional TVS tube is connected to the negative electrode of the LED by a wire.

[0011] Further, the negative ion driving circuit includes a power supply protection circuit of the negative ion generator, the power supply protection circuit includes a connector, a power supply and a reverse protection diode, and the connector is respectively connected to the power supply and the negative electrode of the reverse protection diode;

[0012] The power supply is used to provide energy for the negative ion generator.

[0013] Furthermore, the negative ion driving circuit further comprises a metal-oxide-semiconductor field-effect transistor (MOS), the drain of the MOS tube being respectively connected to the positive electrode of the diode and the connector, and the source of the MOS tube being connected to the grounding end of the wire;

[0014] The MOS tube is used to control the shutdown of the negative ion driving circuit.

[0015] Furthermore, the negative ion driving circuit also includes a microcontroller MCU (Micro Controller Unit);

[0016] The MCU is used to send a control instruction signal to the MOS tube, and the control instruction signal is used to instruct the MOS tube to control the shutdown of the negative ion driving circuit.

[0017] Furthermore, the negative ion driving circuit also includes a MOS tube protection circuit, the MOS tube protection circuit is connected to the MCU, and the MOS tube protection circuit is connected in parallel with the MOS tube.

[0018] Furthermore, the MOS tube protection circuit includes a first resistor, a second resistor and a second bidirectional TVS tube, the MCU is connected to the gate of the MOS tube via the first resistor, and the MCU is connected to the ground terminal of the wire via the second resistor.

[0019] Furthermore, the MOS protection circuit also includes a parasitic diode, and the parasitic diode is connected in parallel with the MOS tube.

[0020] Furthermore, the utility model provides an electronic device, comprising the working status detection device mentioned above.

[0021] The technical solution adopted by the utility model to solve the technical problem is: an electronic device comprising the working state detection device is also provided.

[0022] The working state detection device provided by the utility model has a detection circuit which detects the induced electric field around the negative ion generator and can, when the ion generator works normally, indicate that the negative ion generator generates negative ions by emitting light through a light emitting component.

[0023] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0025] Figure 1 It is a structural schematic diagram of an optional working status detection device shown in an embodiment of the utility model.

[0026] Figure 2 It is a structural schematic diagram of another optional working status detection device shown in an embodiment of the utility model.

[0027] Figure 3 It is a structural schematic diagram of an optional negative ion driving circuit shown in an embodiment of the utility model.

[0028] Figure 4 It is a structural schematic diagram of another optional negative ion driving circuit shown in an embodiment of the utility model.

[0029] Figure 5 It is a current direction schematic diagram of a working status detection device shown in an embodiment of the utility model.

[0030] In the figure: 1 negative ion generator, 2 detection circuit, 21 light emitting component, 22 first bidirectional TVS tube, 3 negative ion driving circuit, 31 power supply protection circuit, 311 connector, 312 power supply, 313 reverse protection diode, 32 MOS tube, 33 MCU, 34 MOS tube protection circuit, 341 first resistor, 342 second resistor, 343 second bidirectional TVS tube, 344 parasitic diode. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] First, the application scenario of the utility model is described.

[0035] Negative oxygen ions in the air are called "air vitamins". They have the functions of sterilization, dust reduction, air cleaning, improving immunity, and regulating the balance of human body functions, and they play an important role in improving the atmospheric environment. Therefore, electronic devices that produce negative ions are widely used, such as electric fans, air purifiers, air conditioners, hair dryers, hair straighteners, electric hair clips, electric combs, monitors, computer cases, desk lamps, energy-saving lamps, night lights, humidifiers, etc.

[0036] At present, the commonly used methods for generating negative ions include high-voltage discharge and artificial ionization. The principle of high-voltage discharge is to ionize oxygen molecules into negatively charged ions through a high-voltage electric field, thereby forming negative oxygen ions. High-voltage discharge usually uses a DC or AC high-voltage power supply to increase the voltage to several thousand volts or tens of thousands of volts to form an arc discharge. In oxygen molecules, arc discharge will ionize oxygen molecules into oxygen ions with a certain negative charge and oxygen ions with a certain positive charge. The advantage of high-voltage discharge is that a large number of negative oxygen ions can be generated quickly, and the number of negative oxygen ions generated can be adjusted by selecting electrode materials and voltage. The disadvantage is that it will also produce harmful substances such as ozone, and the equipment cost is relatively high. The principle of artificial ionization is similar to that of high-voltage discharge. Artificial ionization usually uses electrodes such as ionization needles and ionization wires. By applying high voltage, oxygen molecules are ionized into negatively charged oxygen ions, thereby forming negative oxygen ions.

[0037] However, most of the existing negative ion control circuits are open-loop control, and the negative ion generator is driven only by an external drive. However, when the negative ion generator fails or fails, it is impossible to promptly identify that the negative ion generator does not generate negative ions normally, thereby affecting the user experience. In order to solve the above problems, the utility model provides a working state detection device, and the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings.

[0038] Figure 1 Schematic diagram of an optional working state detection device shown in the embodiment of the utility model. Figure 1 The working state detection device in this embodiment includes a negative ion generator 1, a negative ion driving circuit 3 and a detection circuit 2, the detection circuit 2 includes a light emitting component 21, the negative ion generator 1 is connected to the negative ion driving circuit 3, wherein,

[0039] A negative ion driving circuit 3 is used to drive the negative ion generator 1 to generate negative ions, so as to generate an induced electric field around the negative ion generator 1;

[0040] The detection circuit 2 is used to detect whether there is an induced electric field around the negative ion generator 1, and trigger the light-emitting component 21 to emit light when the induced electric field is detected around the negative ion generator 1.

[0041] In this embodiment, the negative ion generator 1 generates negative ions by applying a high voltage.

[0042] In this embodiment, one end of the light emitting component 21 is connected to the ground end of the wire (grounded).

[0043] It should be noted that when the negative ion generator 1 works normally to generate negative ions, the negative ions will form an induced electric field around it. Since one end of the light-emitting component 21 is grounded, a potential difference will be generated at both ends of the light-emitting component 21, thereby generating a current. When the current passes through the light-emitting component 21, the light-emitting component 21 emits light. Therefore, when the negative ion generator 1 works normally to generate negative ions, the light-emitting component 21 is triggered to emit light.

[0044] In some embodiments, the light-emitting component 21 can be a circuit structure composed of a cable, an LED and a control circuit; the light-emitting component 21 can also be a single indicator light, such as an LED lamp filled with inert gas, which is not specifically limited in the present invention.

[0045] In this embodiment, the negative ion driving circuit 3 is used to provide energy for the negative ion generator 1 and control the negative ion generator 1 to generate negative ions.

[0046] In some embodiments, the negative ion generator 1 can be a negative ion generating circuit composed of a voltage doubler circuit and a negative ion emitter head, wherein the voltage doubler circuit is used to increase the supply voltage to above 4000 kilovolts (kV) for ionizing the air to generate negative ions, and the negative ion emitter head is a release tip made of carbon elements for discharging to the air to generate negative ions.

[0047] In other embodiments, the negative ion generator 1 includes a pre-stage rectifier circuit, a pre-stage oscillation circuit, a transformer, and a negative ion generating unit; one end of the pre-stage rectifier circuit is connected to a power supply, the other end of the pre-stage rectifier circuit is connected to one end of the pre-stage oscillation circuit, the other end of the pre-stage oscillation circuit is connected to the transformer, and the other end of the transformer is connected to the negative ion generating unit and the power supply end.

[0048] In some embodiments, since the induced electric field formed around the negative ion generator 1 is not stable, the light-emitting component 21 may intermittently emit light or be extinguished; when the negative ion generator 1 is not working, no induced electric field is formed around it, and there is no voltage at the induced voltage, so the light-emitting component 21 will not be lit and remain extinguished. Therefore, the light-emitting state of the light-emitting component 21 can indicate the working state of the negative ion generator 1.

[0049] By means of the working state detection device, the induced electric field around the negative ion generator 1 is detected, and when the ion generator works normally, the light emitting component 21 can emit light to indicate that the negative ion generator 1 generates negative ions.

[0050] In some embodiments, the detection circuit 2 is arranged within a preset range of the ion driving circuit.

[0051] In this embodiment, the preset range may be 1 cm, or 3 cm. It should be noted that the preset range is determined by the voltage of the negative ion generator 1. For example, when the voltage of the negative ion generator 1 is 7 kV, the preset range is 3 cm.

[0052] Figure 2 is a schematic diagram of another optional working state detection device according to an embodiment of the present utility model. Figure 2 The detection circuit 2 also includes a first bidirectional TVS tube 22, and the light-emitting component 21 includes an LED, wherein one end of the first bidirectional TVS tube 22 is connected to the positive electrode of the LED, and the other end of the first bidirectional TVS tube 22 is connected to the negative electrode of the LED.

[0053] In this embodiment, the first bidirectional TVS tube 22 refers to two TVS tubes connected in reverse series, which are used to protect the LED and prevent the LED from being damaged due to excessive negative voltage.

[0054] It is understandable that when the two ends of the TVS tube are subjected to a transient high-energy impact, it can reduce its impedance suddenly at a very high speed, while absorbing a large current, clamping the voltage between its two ends to a predetermined value, thereby ensuring that the subsequent circuit components are protected from damage by the transient high-energy impact. The first bidirectional TVS tube 22 is equivalent to the negative electrodes of two voltage regulator tubes connected in series, and has the same avalanche breakdown characteristics and clamping characteristics in both the positive and negative directions. When there is a problem at either end, the TVS can protect the LED.

[0055] Figure 3 is a schematic diagram of an optional negative ion driving circuit 3 shown in an embodiment of the utility model, please refer to Figure 3 The negative ion driving circuit 3 includes a power supply protection circuit 31 of the negative ion generator 1, and the power supply protection circuit 31 includes a connector 311, a power supply 312 and a reverse protection diode 313, and the connector 311 is connected to the negative electrode of the power supply 312 and the reverse protection diode 313 respectively;

[0056] The power supply 312 is used to provide energy for the negative ion generator 1 .

[0057] In this embodiment, the power supply 312 is mainly responsible for providing electrical energy to the negative ion generator 1 so that the negative ion generator 1 can operate normally.

[0058] In a possible implementation, the power supply 312 is a fixed voltage power supply, for example, the power supply 312 is a 12V constant voltage source.

[0059] In this embodiment, the negative ion generator 1 is connected to the power supply protection circuit 31 through the connector 311. The connector 311 is a positioning joint for connecting electronic circuits, which is composed of two parts, a plug-in and a connector. Under normal conditions, it can be completely separated. The switch and the connector 311 are similar in that the purpose of switching the connected circuit is achieved by changing the contact state of their contact pairs, and the essential difference is that the plug-in connector has only two states: insertion and removal. The switch can achieve the conversion of the circuit on its body, while the connector 311 cannot achieve the conversion on the body. The contact pairs of the connector 311 have a fixed corresponding relationship. In some scenarios, the connector 311 can also be called a connector.

[0060] In this embodiment, the reverse protection diode 313 is used to protect the negative ion generator 1 from abnormal voltage or abnormal current. The reverse protection diode 313 can ensure that the current can only flow in the forward direction, and the power supply 312 only applies a positive voltage to the negative ion driving circuit 3.

[0061] In some embodiments, see Figure 2 The negative ion driving circuit 3 also includes a MOS tube 32, the drain of the MOS tube 32 is respectively connected to the positive electrode of the reverse protection diode and the connector, and the source of the MOS tube 32 is connected to the grounding end of the wire;

[0062] The MOS tube 32 is used to control the negative ion driving circuit 3 to be turned off.

[0063] In one possible implementation, Figure 2 As shown, the MOS tube 32 is an N-channel enhancement type.

[0064] It is understandable that the MOS tube 32 receives the low voltage control signal as input and converts it into a higher voltage sufficient to drive the gate. By shutting down or turning on itself, it can control the shutting down or turning on of the driving circuit. The MOS tube 32 has many advantages, such as: 1. It can be used for amplification. Since the input impedance of the field effect tube amplifier is very high, the coupling capacitor can be small in capacity and there is no need to use an electrolytic capacitor. 2. The very high input impedance is very suitable for impedance conversion. It is often used in the input stage of a multi-stage amplifier for impedance conversion. 3. It can be used as a variable resistor. 4. It can be conveniently used as a constant current source. 5. It can be used as an electronic switch. 6. It has great flexibility in circuit design. The gate bias can be positive, negative or zero. The triode can only work under forward bias, and the electron tube can only work under negative bias. In addition, the input impedance is high, which can reduce the signal source load and is easy to match with the previous stage. It can be seen that the use of the MOS tube 32 to control the shutdown of the negative ion drive circuit 3 can ensure the stability of the negative ion drive circuit 3.

[0065] In some embodiments, see Figure 2, the negative ion driving circuit 3 also includes a microcontroller MCU33;

[0066] The MCU 33 is used to send a control instruction signal to the MOS tube 32 , and the control instruction signal is used to instruct the MOS tube 32 to control the negative ion driving circuit 3 to be turned off.

[0067] In this embodiment, MCU33 has functions of bottom-level driving, system scheduling, fault diagnosis, etc. MCU33 is used to send a shutdown control signal or a conduction control signal to MOS tube 32, and then control the entire negative ion driving circuit 3 by controlling MOS tube 32.

[0068] Exemplarily, MCU33 is a chip, using ST's STM8AF6246TA. The entire control logic is compiled into an executable file through code and burned into the chip. The program can complete the function of controlling the MOS tube 32 and controlling the negative ion driving circuit 3. By controlling the shutdown of the negative ion driving circuit 3, MCU33 can further control the opening or closing of the negative ion generator 1.

[0069] Figure 4 This is a schematic diagram of another optional negative ion driving circuit 3 shown in the embodiment of the utility model. Figure 4 The negative ion driving circuit 3 also includes a MOS tube protection circuit 34 , which is connected to the MCU 33 , and the MOS tube protection circuit 34 is connected in parallel to the MOS tube 32 .

[0070] Furthermore, the MOS tube protection circuit 34 includes a first resistor 341, a second resistor 342 and a second bidirectional TVS tube 343. The MCU33 is connected to the gate of the MOS tube 32 via the first resistor 341, the MCU33 is connected to the ground terminal of the wire via the second resistor 342, and the second bidirectional TVS tube 343 is connected in parallel at both ends of the MOS tube 32.

[0071] In this embodiment, the first resistor 341 is used to prevent the MOS tube 32 from being broken down.

[0072] It should be noted that the control signal output by MCU33 should be a continuously changing process, and neither the voltage on the capacitor nor the current on the inductor can change suddenly, otherwise catastrophic consequences will occur. Therefore, a first resistor 341 is added to the negative ion driving circuit 3 to make the rising and falling edges smooth to protect the MOS tube 32, thereby improving the stability of the negative ion driving circuit 3.

[0073] In this embodiment, the second resistor 342 is used to prevent the gate (G pole) of the MOS tube 32 from being suspended and causing accidental conduction.

[0074] It should be noted that the Miller effect sometimes occurs during the operation of the MOS tube 32. The Miller effect refers to the fact that in a reverse voltage amplifier, the capacitance or impedance between the output and input terminals will increase the equivalent capacitance or impedance of the input terminal. The Miller effect will affect the frequency response and switching speed of the circuit and increase the switching loss. This is because there is a parasitic capacitance inside the MOS tube 32. When we apply a voltage between DS, the voltage will charge the gate-source capacitance (Cgs) through the gate-drain capacitance (Cdg), thereby causing the G pole voltage to gradually increase until the MOS tube 32 is turned on. In other words, when the MOS tube 32 is in operation, this capacitance will interact with other components in the circuit, causing the change in the gate voltage to be amplified, thereby affecting the performance of the entire circuit. Therefore, in order to reduce the impact of the Miller effect. In addition, in order to reduce the impact of the gate charge and improve the stability of the circuit, a resistor is usually connected in parallel between the gate and the source of the MOS tube 32. The existence of this resistor is mainly to damp the change in the gate charge, thereby preventing the MOS tube 32 from being accidentally turned on and damaged by the voltage between the gate and the source caused by the MOS tube 32 gate being suspended. At the same time, when there is no driving signal, the resistor can fix the gate potential of the MOS tube 32 at a lower state, thereby avoiding false triggering and ensuring reliable on-off operation. In this way, connecting the second resistor 342 between the gate and source of the MOS tube 32 can ensure the stable operation of the MOS tube 32, thereby improving the stability of the negative ion driving circuit 3.

[0075] In practical applications, the second resistor 342 may be several kilohms (kΩ) to several tens of kΩ.

[0076] In this embodiment, the second bidirectional TVS tube 343 has the following functions: when the voltage in the forward and reverse directions reaches the regulated voltage value, the current increases sharply, the electromotive force increases, and a damping effect is played.

[0077] In some embodiments, see Figure 4 The MOS protection circuit further includes a parasitic diode 344 , which is connected in parallel with the MOS tube 32 .

[0078] In a possible implementation, after the lithium battery is over-discharged, the protection function is turned on and the discharge MOS tube 32 is turned off. When the charger is plugged in, the parasitic diode 344 is used to turn on the circuit and the system works normally.

[0079] Figure 5 Schematic diagram of the current direction of a working state detection device shown in the embodiment of the utility model. Figure 5 As shown, in the detection circuit 2, since one end of the light emitting component 21 is grounded, a potential difference is generated at both ends of the light emitting component 21, thereby generating a current, and the direction of the current is from the positive electrode to the negative electrode of the LED.

[0080] In the negative ion driving circuit 3, it is divided into two parts: a MOS tube protection circuit 34 and a power supply protection circuit 31. In the MOS tube protection circuit 34, the current direction of the MOS tube 32 is from the gate to the source, and from the drain to the source. There are two situations in which the current direction from the gate of the MOS tube 32 to the first resistor 341 and the second resistor 342 is divided into two situations: situation 1, when the MCU33 sends a shutdown control signal to the MOS tube 32, the current is divided into two paths from the gate of the MOS tube 32, one path flows to the first resistor 341, and the other path flows to the second resistor 342. Situation 2, when the MCU33 sends a conduction control signal to the MOS tube 32, the current flows from the gate of the MOS tube 32 to the first resistor 341 first, and then flows to the second resistor 342 through the first resistor 341. In the power supply protection circuit 31, the current flows from the power supply 312 to the negative ion generator 1 through the connector 311.

[0081] It should be noted that, for the description of the same steps and the same contents in this embodiment as those in other embodiments, reference can be made to the description in other embodiments and will not be repeated here.

[0082] In an exemplary embodiment, the utility model provides an electronic device, comprising the working status detection device described above.

[0083] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0084] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0085] The features disclosed in the various product embodiments provided by the utility model can be arbitrarily combined without conflict to obtain new product embodiments.

[0086] The features disclosed in the various method or device embodiments provided by the present invention can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0087] In the several embodiments provided by the present utility model, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0088] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple grid units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0089] The above shows and describes the basic principle, main features and advantages of the utility model, and the standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description and the drawings, and the specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0090] The above description is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0091] The above description is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A working status detection device, characterized in that: It includes a negative ion generator, a negative ion driving circuit and a detection circuit, wherein the detection circuit includes a light-emitting component, and the negative ion generator is connected to the negative ion driving circuit. The negative ion driving circuit is used to drive the negative ion generator to generate negative ions, so as to generate an induced electric field around the negative ion generator; The detection circuit is used to detect whether the induced electric field exists around the negative ion generator, and trigger the light-emitting component to emit light when the induced electric field is detected around the negative ion generator; The negative ion driving circuit includes a power supply protection circuit of the negative ion generator, and the power supply protection circuit includes a connector, a power supply and a reverse protection diode, and the connector is respectively connected to the power supply and the negative electrode of the reverse protection diode.

2. The working status detection device according to claim 1, characterized in that: The detection circuit is arranged within a preset range of the ion driving circuit.

3. The working status detection device according to claim 2, characterized in that: The detection circuit also includes a first bidirectional transient voltage suppressor TVS tube, and the light-emitting component includes a light-emitting diode LED; one end of the first bidirectional TVS tube is connected to the positive electrode of the LED, and the other end of the first bidirectional TVS tube is connected to the negative electrode of the LED.

4. The working status detection device according to claim 1, characterized in that: The power supply is used to provide energy for the negative ion generator.

5. The working status detection device according to claim 1, characterized in that: The negative ion driving circuit also includes a metal oxide semiconductor field effect transistor (MOS) tube, the drain of which is respectively connected to the positive electrode of the reverse protection diode and the connector, and the source of which is connected to the grounding end of the wire; The MOS tube is used to control the shutdown of the negative ion driving circuit.

6. The working status detection device according to claim 5, characterized in that: The negative ion driving circuit also includes a microcontroller MCU; The MCU is used to send a control instruction signal to the MOS tube, and the control instruction signal is used to instruct the MOS tube to control the shutdown of the negative ion driving circuit.

7. The working status detection device according to claim 6, characterized in that: The negative ion driving circuit also includes a MOS tube protection circuit, which is connected to the MCU and is connected in parallel with the MOS tube.

8. The working status detection device according to claim 6, characterized in that: The MOS tube protection circuit includes a first resistor, a second resistor and a second bidirectional TVS tube. The MCU is connected to the gate of the MOS tube via the first resistor, and the MCU is connected to the ground terminal of the wire via the second resistor.

9. The working status detection device according to claim 7, characterized in that: The MOS tube protection circuit also includes a parasitic diode, and the parasitic diode is connected in parallel with the MOS tube.

10. An electronic device, characterized in that: It comprises the working status detection device as claimed in any one of claims 1 to 9.

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