Low-power-consumption mute electronic mosquito swatter circuit

Abstract

The utility model relates to the technical field of mosquito eradication, in particular to a low-power-consumption mute electric mosquito swatter circuit which comprises a DC / DC voltage reduction unit, a switch unit, a voltage boosting unit and a mosquito eradication power grid. The output end of the DC / DC step-down unit is electrically connected with the input end of the switch unit, the output end of the switch unit is electrically connected with the input end of the step-up unit, and the output end of the step-up unit is electrically connected with the input end of the mosquito eradication power grid; the DC / DC step-down unit is used for reducing the power supply voltage according to a preset step-down value to generate a reference power grid voltage; the switch unit is used for controlling connection or disconnection between the DC / DC step-down unit and the step-up unit; the boost unit is used for increasing the reference power grid voltage according to a preset boost value and generating power grid voltage to drive the mosquito-killing power grid. The low-power-consumption operation of the electric mosquito swatter is realized by reducing the voltage of the mosquito-killing power grid, and the mosquito-killing sound is small.

Description

Technical Field

[0001] The utility model relates to the technical field of mosquito killing, in particular to a low-power consumption and silent electric mosquito swatter circuit. Background Art

[0002] As a common household mosquito-killing tool, electric mosquito swatters usually work by electrocuting mosquitoes through a high-voltage power grid, thereby achieving the effect of killing mosquitoes. However, in the existing designs of electric mosquito swatters, in order to achieve a higher mosquito-killing effect, the voltage is often designed to be relatively high; this design idea is mainly based on the fact that high-voltage power grids can more quickly and effectively electrocute and kill mosquitoes that come into contact with the power grid; however, this high-voltage design also brings a series of problems in practical applications.

[0003] First, the high voltage design increases the potential safety hazard during use. For handheld electric mosquito swatters, if the user accidentally touches the power grid during use, he or she may suffer an electric shock, which is a potential safety risk for users, especially children. In addition, the high voltage may also cause damage to the electronic components inside the electric mosquito swatter, reducing the service life of the product.

[0004] Secondly, the high voltage design will also increase the energy consumption of the electric mosquito swatter. Due to the need to maintain a higher voltage output, the battery consumption rate of the electric mosquito swatter will be accelerated, which not only reduces the battery life of the electric mosquito swatter, but also increases the user's cost and reduces the environmental performance of the product.

[0005] In addition, the high voltage design also brings noise problems. When mosquitoes come into contact with the high voltage power grid, the current shock generated by the contact between the power grid and the mosquito will produce a loud noise due to the high voltage. This noise is particularly obvious at night or in a quiet environment, which may not only disturb the user's rest, but also affect the sleep of family members. More importantly, it is easy to mislead users into thinking that the quality of the electric mosquito swatter is poor, because in the general perception of users, a loud mosquito killing noise is equivalent to a poor quality electric mosquito swatter. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to propose a low-power silent electric mosquito swatter circuit, which can realize low-power operation of the electric mosquito swatter and low mosquito killing noise by reducing the voltage of the mosquito killing grid.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A low-power silent electric mosquito swatter circuit, comprising a DC / DC buck unit, a switch unit, a boost unit and a mosquito-killing network; the output end of the DC / DC buck unit is electrically connected to the input end of the switch unit, the output end of the switch unit is electrically connected to the input end of the boost unit, and the output end of the boost unit is electrically connected to the input end of the mosquito-killing network;

[0009] The DC / DC step-down unit is used to reduce the power supply voltage according to a preset step-down value to generate a reference grid voltage;

[0010] The switch unit is used to control the conduction or disconnection between the DC / DC buck unit and the boost unit;

[0011] The boost unit is used to increase the reference grid voltage according to a preset boost value to generate a grid voltage to drive the mosquito-killing grid.

[0012] Furthermore, it also includes a charging management unit, a gear selection unit and a power supply unit; the input end of the charging management unit is externally connected to a charging power supply, the output end of the charging management unit is electrically connected to the positive electrode of the power supply unit, the positive electrode of the power supply unit BT1 is electrically connected to the input end of the gear selection unit, the first gear output end of the gear selection unit is suspended, and the second gear output end of the gear selection unit is electrically connected to the input end of the DC / DC buck unit;

[0013] The charging management unit is used to connect to the charging power source to charge the power supply unit;

[0014] The first gear of the gear selection unit is used to turn off the electric mosquito swatter, and the second gear of the gear selection unit is used to turn on the electric mosquito swatter.

[0015] Furthermore, the switch unit is also used for charging status prompt and mosquito killing status prompt; the status prompt output end of the charging management unit is electrically connected to the status prompt input end of the switch unit.

[0016] Further, the DC / DC buck unit includes a capacitor C1, a capacitor C2, a DC / DC buck chip U1, an inductor L1, a resistor R3, a resistor R4 and a diode D5; the VIN terminal of the DC / DC buck chip U1 is used as the input terminal of the DC / DC buck unit, and the cathode of the diode D5 is used as the output terminal of the DC / DC buck unit;

[0017] One end of the capacitor C1 and the EN end of the DC / DC buck chip U1 are electrically connected to the VIN end of the DC / DC buck chip U1, the other end of the capacitor C1 and the GND end of the DC / DC buck chip U1 are grounded, the SW end of the DC / DC buck chip U1 is electrically connected to one end of the inductor L1, the other end of the inductor L1, one end of the resistor R3, and one end of the capacitor C2 are electrically connected to the anode of the diode D5, the other end of the resistor R3 and one end of the resistor R4 are electrically connected to the FB end of the DC / DC buck chip U1, and the other end of the resistor R4 and the other end of the capacitor C2 are electrically connected to the GND end of the DC / DC buck chip U1.

[0018] Further, the boost unit includes a first boost circuit, a boost transformer T1 and a second boost circuit; the input end of the first boost circuit is used as the input end of the boost unit, and the output end of the second boost circuit is used as the output end of the boost unit;

[0019] The first output terminal, the second output terminal and the third output terminal of the first boost circuit are electrically connected to the first winding opposite-name terminal, the first winding same-name terminal and the second winding opposite-name terminal of the primary side of the boost transformer T1, respectively, and the second winding same-name terminal of the primary side of the boost transformer T1 is grounded;

[0020] The first input terminal and the second input terminal of the second boost circuit are electrically connected to the same-name terminal and the opposite-name terminal of the secondary side of the boost transformer T1 respectively;

[0021] The first boost circuit is used to receive the reference grid voltage, coupled with the primary side self-excited oscillation boost of the boost transformer T1, and generate a self-excited grid voltage;

[0022] The second boost circuit is used to receive the self-excited grid voltage, coupled to the secondary side of the boost transformer T1, boost the voltage according to a preset boost multiple, and generate the grid voltage;

[0023] The preset boost value=the boost value of the self-excited oscillation boost*the preset boost multiple.

[0024] Further, the switch unit includes a switch element, a diode D4, a resistor R5, a resistor R6, a light emitting diode LED2 and a light emitting diode LED3; one end of the switch element is used as an input end of the switch unit, the other end of the switch element is used as an output end of the switch unit, and the cathode of the light emitting diode LED2 is used as a status prompt input end of the switch unit;

[0025] The anode of the diode D4 is electrically connected to the other end of the switch element, the cathode of the diode D4 is electrically connected to one end of the resistor R6, the other end of the resistor R6, one end of the resistor R5, and the anode of the light emitting diode LED3 are all electrically connected to the anode of the light emitting diode LED2, the cathode of the light emitting diode LED3 is grounded, and the other end of the resistor R5 is connected to the VCC power supply;

[0026] The switch element is a reset switch or a self-locking switch.

[0027] Further, the first boost circuit includes a capacitor C4, a transistor Q1 and a resistor R7; the positive electrode of the capacitor C4 is used as the input end of the first boost circuit, the collector of the transistor Q1 is used as the first output end of the first boost circuit, one end of the resistor R7 is used as the second output end of the first boost circuit, and the emitter of the transistor Q1 is used as the third output end of the first boost circuit;

[0028] The positive electrode of the capacitor C4 is electrically connected to the collector of the transistor Q1 , the base of the transistor Q1 is electrically connected to the other end of the resistor R7 , and the negative electrode of the capacitor C4 is grounded.

[0029] Further, the second boost circuit includes a capacitor C3, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a diode D3, a resistor R9, a resistor R10 and a resistor R11; an anode of the diode D3 is used as a first input terminal of the second boost circuit, one end of the capacitor C3 is used as a second input terminal of the second boost circuit, and one end and the other end of the capacitor C6 are used as output terminals of the second boost circuit;

[0030] One end of the capacitor C5 is electrically connected to the anode of the diode D3, the cathode of the diode D3, one end of the resistor R11, and one end of the capacitor C6 are all electrically connected to the other end of the capacitor C3, one end of the capacitor C3 is electrically connected to the cathode of the diode D2, the anode of the diode D2 and the other end of the capacitor C5 are all electrically connected to the cathode of the diode D1, the anode of the diode D1 and one end of the resistor R10 are all electrically connected to the other end of the capacitor C6, the other end of the resistor R11 is electrically connected to one end of the resistor R9, and the other end of the resistor R9 is electrically connected to the other end of the resistor R10.

[0031] Furthermore, the charging management unit includes a resistor R1, a resistor R2, a capacitor C7, a capacitor C8 and a charging chip U2; one end of the resistor R1 and the VIN end of the charging chip U2 are both used as input ends of the charging management unit, the STAT1 end of the charging chip U2 is used as a status prompt output end of the charging management unit, and the BAT end of the charging chip U2 is used as an output end of the charging management unit;

[0032] The other end of the resistor R1 is electrically connected to the ISET end of the charging chip U2, the VSS end of the charging chip U2 is grounded, one end of the resistor R2 is electrically connected to the VIN end of the charging chip U2, the other end of the resistor R2 is electrically connected to one end of the capacitor C8, the BAT end of the charging chip U2 is electrically connected to one end of the capacitor C7, and the other end of the capacitor C8 and the other end of the capacitor C7 are both grounded.

[0033] Furthermore, the gear selection unit is a multi-speed switch.

[0034] The technical solution provided by the utility model may include the following beneficial effects: a DC / DC step-down unit, a switch unit, a boost unit and a mosquito-killing network form a working circuit of an electric mosquito swatter; when a user uses the electric mosquito swatter, the electric mosquito swatter is turned on, and a power supply voltage is transmitted to the DC / DC step-down unit; the switch unit conducts a circuit between the DC / DC step-down unit and the boost unit (i.e., the mosquito-killing network is turned on); the DC / DC step-down unit reduces the power supply voltage according to a preset step-down value, generates a reference network voltage, and transmits it to the boost unit; the boost unit increases the reference network voltage according to a preset boost value, and generates a network voltage to drive the mosquito-killing network; thereby, by reducing the power supply voltage, the final network voltage is lower than the original network voltage, and then by reducing the network voltage, the purpose of reducing power consumption is achieved most quickly, the loss of electronic components inside the electric mosquito swatter is reduced, the service life of the product is increased, the battery life of the electric mosquito swatter is increased, and the user's usage cost is reduced. More importantly, after the driving voltage of the mosquito-killing power grid is reduced, the sound produced by the current shock generated by the contact between the power grid and the mosquitoes is reduced accordingly, or even eliminated. This not only prevents the mosquito-killing sound from disturbing the user's rest, but also prevents users from mistakenly believing that there is a problem with the quality of the electric mosquito swatter. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The utility model is a schematic diagram of a low-power silent electric mosquito swatter circuit in one embodiment of the utility model.

[0036] Figure 2 Yes Figure 1 The circuit diagram of the DC / DC buck unit is shown.

[0037] Figure 3 Yes Figure 1 The circuit diagram of the switching unit and the boost unit is shown.

[0038] Figure 4 Yes Figure 1 The circuit diagram of the gear selection unit and the power supply unit is shown.

[0039] Figure 5 Yes Figure 1 The circuit diagram of the charge management unit is shown.

[0040] Among them: DC / DC buck unit 1, switch unit 2, boost unit 3, mosquito killing grid 4, charging management unit 5, gear selection unit 6, power supply unit BT1, capacitor C1, capacitor C2, DC / DC buck chip U1, inductor L1, resistor R3, resistor R4, diode D5, first boost circuit 31, boost transformer T1, second boost circuit 32, switch K2, diode D4, resistor R5, resistor R6, light emitting diode LED2, light emitting diode LED3, capacitor C4, transistor Q1, resistor R7, capacitor C3, capacitor C5, capacitor C6, diode D1, diode D2, diode D3, resistor R9, resistor R10, resistor R11, resistor R1, resistor R2, capacitor C7, capacitor C8, charging chip U2, multi-speed switch K1. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying 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 one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0044] Combine the following Figures 1 to 5 , describing a low-power silent electric mosquito swatter circuit according to an embodiment of the utility model.

[0045] A low-power silent electric mosquito swatter circuit comprises a DC / DC buck unit 1, a switch unit 2, a boost unit 3 and a mosquito-killing electric network 4; the output end of the DC / DC buck unit 1 is electrically connected to the input end of the switch unit 2, the output end of the switch unit 2 is electrically connected to the input end of the boost unit 3, and the output end of the boost unit 3 is electrically connected to the input end of the mosquito-killing electric network 4;

[0046] The DC / DC step-down unit 1 is used to reduce the power supply voltage according to a preset step-down value to generate a reference grid voltage;

[0047] The switch unit 2 is used to control the conduction or disconnection between the DC / DC buck unit 1 and the boost unit;

[0048] The boost unit 3 is used to increase the reference grid voltage according to a preset boost value, and generate a grid voltage to drive the mosquito-killing grid 4 .

[0049] The utility model proposes a preferred embodiment of a low-power silent electric mosquito swatter circuit, such as Figures 1 to 5 As shown, the DC / DC buck unit 1, the switch unit 2, the boost unit 3 and the mosquito killing network 4 constitute the working circuit of the electric mosquito swatter. When the user uses the electric mosquito swatter, the electric mosquito swatter is turned on, and the power supply voltage is transmitted to the DC / DC buck unit 1. The switch unit 2 conducts the circuit between the DC / DC buck unit 1 and the boost unit (that is, the mosquito killing network 4 is turned on), so that the DC / DC buck unit 1 reduces the power supply voltage according to the preset buck value, generates a reference grid voltage and transmits it to the boost unit 3, and the boost unit 3 increases the reference grid voltage according to the preset boost value to generate a grid voltage to drive the mosquito killing network 4; thereby, by reducing the power supply voltage, the final grid voltage is lower than the original grid voltage, and then by reducing the grid voltage, the purpose of reducing power consumption is achieved most quickly, the loss of electronic components inside the electric mosquito swatter is reduced, the service life of the product is increased, the battery life of the electric mosquito swatter is increased, and the user's use cost is reduced. More importantly, after the driving voltage of the mosquito-killing power grid is reduced, the sound produced by the current shock generated by the contact between the power grid and the mosquitoes is reduced accordingly, or even eliminated. This not only prevents the mosquito-killing sound from disturbing the user's rest, but also prevents users from mistakenly believing that there is a problem with the quality of the electric mosquito swatter.

[0050] It should be noted that the reduction in grid voltage will not affect the mosquito killing effect. For example, existing electric mosquito swatters usually use a voltage of 3000V, but in fact 2000V can achieve the mosquito killing effect. Therefore, the power supply voltage can be reduced to 2.5V (reference grid voltage), which can make the grid voltage reach 2000V and achieve voltage reduction. The preset voltage reduction value and the preset voltage boost value can be set according to the voltage reduction target.

[0051] Furthermore, it also includes a charging management unit 5, a gear selection unit 6 and a power supply unit BT1; the input end of the charging management unit 5 is externally connected to a charging power supply, the output end of the charging management unit 5 is electrically connected to the positive electrode of the power supply unit BT1, the positive electrode of the power supply unit BT1 is electrically connected to the input end of the gear selection unit 6, the first gear output end of the gear selection unit 6 is suspended, and the second gear output end of the gear selection unit 6 is electrically connected to the input end of the DC / DC buck unit 1;

[0052] The charging management unit 5 is used to charge the power supply unit BT1 with an external charging power source;

[0053] The first gear of the gear selection unit 6 is used to turn off the electric mosquito swatter, and the second gear of the gear selection unit 6 is used to turn on the electric mosquito swatter.

[0054] In this embodiment, the control circuit of the electric mosquito swatter is composed of a gear selection unit 6 and a power supply unit BT1. The gear selection unit 6 controls whether the power supply unit BT1 can supply power to the working circuit of the electric mosquito swatter to realize control; specifically, the gear selection unit 6 realizes the opening or closing of the electric mosquito swatter by suspending the first gear output end and electrically connecting the second gear output end to the input end of the DC / DC buck unit 1, and then the mosquito killing network can be opened or closed by the switch unit 2, and finally the control of the electric mosquito swatter is realized. The power supply circuit of the electric mosquito swatter is composed of a charging management unit 5 and a power supply unit BT1.

[0055] Furthermore, the switch unit 2 is also used for charging status prompt and mosquito killing status prompt; the status prompt output end of the charging management unit 5 is electrically connected to the status prompt input end of the switch unit 2.

[0056] In this embodiment, because the user controls the mosquito-killing electric network 4 through the switch unit 2, a charging status and mosquito-killing status prompt function is provided in the switch unit 2, so that the user can understand the working status of the electric mosquito swatter in time.

[0057] Furthermore, the DC / DC buck unit 1 includes a capacitor C1, a capacitor C2, a DC / DC buck chip U1, an inductor L1, a resistor R3, a resistor R4 and a diode D5; the VIN terminal of the DC / DC buck chip U1 is used as the input terminal of the DC / DC buck unit 1, and the cathode of the diode D5 is used as the output terminal of the DC / DC buck unit 1;

[0058] One end of the capacitor C1 and the EN end of the DC / DC buck chip U1 are electrically connected to the VIN end of the DC / DC buck chip U1, the other end of the capacitor C1 and the GND end of the DC / DC buck chip U1 are grounded, the SW end of the DC / DC buck chip U1 is electrically connected to one end of the inductor L1, the other end of the inductor L1, one end of the resistor R3, and one end of the capacitor C2 are electrically connected to the anode of the diode D5, the other end of the resistor R3 and one end of the resistor R4 are electrically connected to the FB end of the DC / DC buck chip U1, and the other end of the resistor R4 and the other end of the capacitor C2 are electrically connected to the GND end of the DC / DC buck chip U1.

[0059] In this embodiment, the DC / DC buck unit 1 is formed by a DC / DC buck chip U1 and its peripheral circuits to form a power supply voltage buck circuit. Through PWM adjustment of the DC / DC buck chip U1 and the inductor L1, and voltage division of the resistor R3 and the resistor R4, the reference grid voltage is finally obtained. Therefore, the preset buck value can be achieved through the DC / DC buck chip U1, the inductor L1, the resistor R3 and the resistor R4.

[0060] Further, the boost unit 3 includes a first boost circuit 31, a boost transformer T1 and a second boost circuit 32; the input end of the first boost circuit 31 is used as the input end of the boost unit 3, and the output end of the second boost circuit 32 is used as the output end of the boost unit 3;

[0061] The first output terminal, the second output terminal and the third output terminal of the first boost circuit 31 are electrically connected to the first winding opposite-name terminal, the first winding same-name terminal and the second winding opposite-name terminal of the primary side of the boost transformer T1 respectively, and the second winding same-name terminal of the primary side of the boost transformer T1 is grounded;

[0062] The first input terminal and the second input terminal of the second boost circuit 32 are electrically connected to the same-name terminal and the opposite-name terminal of the secondary side of the boost transformer T1, respectively;

[0063] The first boost circuit 31 is used to receive the reference grid voltage, and to generate a self-excited grid voltage by coupling the primary side self-excited oscillation boost of the boost transformer T1;

[0064] The second boost circuit 32 is used to receive the self-excited grid voltage, coupled to the secondary side of the boost transformer T1 to boost the voltage according to a preset boost multiple, and generate a grid voltage;

[0065] Preset boost value = boost value of self-excited oscillation boost * preset boost multiple.

[0066] In this embodiment, after obtaining the reference grid voltage, the boost unit 3 is required to boost the voltage according to the reference grid voltage before driving the mosquito killing grid 4. After the first boost circuit 31 is coupled to the primary side of the boost transformer T1 for self-oscillation boosting, the secondary side of the boost transformer T1 is coupled to the second boost circuit 32 to boost the voltage according to the preset boost multiple and finally reach a grid voltage of about 2000V.

[0067] Further, the switch unit 2 includes a switch element K2, a diode D4, a resistor R5, a resistor R6, a light emitting diode LED2 and a light emitting diode LED3; one end of the switch element K2 is used as an input end of the switch unit 2, the other end of the switch element K2 is used as an output end of the switch unit 2, and the cathode of the light emitting diode LED2 is used as a status prompt input end of the switch unit 2;

[0068] The anode of the diode D4 is electrically connected to the other end of the switch element K2, the cathode of the diode D4 is electrically connected to one end of the resistor R6, the other end of the resistor R6, one end of the resistor R5, and the anode of the light emitting diode LED3 are all electrically connected to the anode of the light emitting diode LED2, the cathode of the light emitting diode LED3 is grounded, and the other end of the resistor R5 is connected to the VCC power supply;

[0069] The switch element K2 is a reset switch or a self-locking switch.

[0070] In this embodiment, the switch unit 2 is mainly realized by the switch element K2 to open or close the mosquito killing network 4, the charging status prompt function of the switch unit 2 is realized by the resistor R5 and the diode LED2, and the mosquito killing status prompt function of the switch unit 2 is realized by the diode D4, the resistor R6 and the diode LED2.

[0071] It should be noted that, depending on the purpose of the electric mosquito swatter, when the switch element K2 is set to a reset switch, it can be used for a handheld electric mosquito swatter, and the user needs to long press the switch element K2 to kill mosquitoes; when the switch element K2 is set to a self-locking switch, it can be used for a placeable electric mosquito swatter, and the user presses the switch element K2 once, the mosquito killing network 4 will continue to be energized, and presses it again to turn off the mosquito killing network 4.

[0072] Furthermore, the first boost circuit 31 includes a capacitor C4, a transistor Q1 and a resistor R7; the positive electrode of the capacitor C4 is used as the input end of the first boost circuit 31, the collector of the transistor Q1 is used as the first output end of the first boost circuit 31, one end of the resistor R7 is used as the second output end of the first boost circuit 31, and the emitter of the transistor Q1 is used as the third output end of the first boost circuit 31;

[0073] The positive electrode of the capacitor C4 is electrically connected to the collector of the transistor Q1 , the base of the transistor Q1 is electrically connected to the other end of the resistor R7 , and the negative electrode of the capacitor C4 is grounded.

[0074] In this embodiment, the first boost circuit 31 is composed of a capacitor C4, a transistor Q1 and a resistor R7 coupled to the primary side of a boost transformer T1 to form a transistor self-excited oscillation boost circuit to self-excite the reference grid voltage, and achieves a preset self-excited boost value through the selection of the boost transformer T1.

[0075] Further, the second boost circuit 32 includes a capacitor C3, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a diode D3, a resistor R9, a resistor R10 and a resistor R11; an anode of the diode D3 is used as a first input terminal of the second boost circuit 32, one end of the capacitor C3 is used as a second input terminal of the second boost circuit 32, and one end and the other end of the capacitor C6 are used as output terminals of the second boost circuit 32;

[0076] One end of capacitor C5 is electrically connected to the anode of diode D3, the cathode of diode D3, one end of resistor R11, and one end of capacitor C6 are electrically connected to the other end of capacitor C3, one end of capacitor C3 is electrically connected to the cathode of diode D2, the anode of diode D2 and the other end of capacitor C5 are electrically connected to the cathode of diode D1, the anode of diode D1 and one end of resistor R10 are electrically connected to the other end of capacitor C6, the other end of resistor R11 is electrically connected to one end of resistor R9, and the other end of resistor R9 is electrically connected to the other end of resistor R10.

[0077] In this embodiment, the second boost circuit 32 is composed of capacitor C3, capacitor C5, capacitor C6, diode D1, diode D2, diode D3, resistor R9, resistor R10 and resistor R11 coupled to the secondary side of the boost transformer T1 to form a multiple rectifier boost circuit to boost the self-excited grid voltage to the grid voltage.

[0078] It should be noted that the power supply voltage of the electric mosquito swatter is usually 2 to 6V. Therefore, in order to keep the final grid voltage at around 2000V, a triple rectification and boosting circuit is preferably used. Rectification and boosting circuits of different multiples can be obtained by selecting a boost transformer T1 with different turns ratios.

[0079] Furthermore, the charging management unit 5 includes a resistor R1, a resistor R2, a capacitor C7, a capacitor C8 and a charging chip U2; one end of the resistor R1 and the VIN end of the charging chip U2 are both used as input ends of the charging management unit 5, the STAT1 end of the charging chip U2 is used as a status prompt output end of the charging management unit 5, and the BAT end of the charging chip U2 is used as an output end of the charging management unit 5;

[0080] The other end of the resistor R1 is electrically connected to the ISET end of the charging chip U2, the VSS end of the charging chip U2 is grounded, one end of the resistor R2 is electrically connected to the VIN end of the charging chip U2, the other end of the resistor R2 is electrically connected to one end of the capacitor C8, the BAT end of the charging chip U2 is electrically connected to one end of the capacitor C7, and the other end of the capacitor C8 and the other end of the capacitor C7 are both grounded.

[0081] In this embodiment, the charging management unit 5 is composed of a charging chip U2 and its peripheral circuits to form a charging circuit for charging the power supply unit BT1.

[0082] Furthermore, the gear selection unit 6 is a multi-gear switch K1.

[0083] In this embodiment, the gear selection unit 6 is set as a multi-gear switch K1 connected to the power supply unit BT1 to realize the control of turning on or off the working circuit (electric mosquito swatter).

[0084] Other structures and operations of a low-power silent electric mosquito swatter circuit according to an embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0085] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-power silent electric mosquito swatter circuit, characterized in that: It includes a DC / DC step-down unit, a switch unit, a boost unit and a mosquito-killing network; the output end of the DC / DC step-down unit is electrically connected to the input end of the switch unit, the output end of the switch unit is electrically connected to the input end of the boost unit, and the output end of the boost unit is electrically connected to the input end of the mosquito-killing network; The DC / DC step-down unit is used to reduce the power supply voltage according to a preset step-down value to generate a reference grid voltage; The switch unit is used to control the conduction or disconnection between the DC / DC buck unit and the boost unit; The boost unit is used to increase the reference grid voltage according to a preset boost value to generate a grid voltage to drive the mosquito-killing grid.

2. A low-power silent electric mosquito swatter circuit according to claim 1, characterized in that: It also includes a charging management unit, a gear selection unit and a power supply unit; the input end of the charging management unit is externally connected to a charging power supply, the output end of the charging management unit is electrically connected to the positive electrode of the power supply unit, the positive electrode of the power supply unit BT1 is electrically connected to the input end of the gear selection unit, the first gear output end of the gear selection unit is suspended, and the second gear output end of the gear selection unit is electrically connected to the input end of the DC / DC buck unit; The charging management unit is used to connect to the charging power source to charge the power supply unit; The first gear of the gear selection unit is used to turn off the electric mosquito swatter, and the second gear of the gear selection unit is used to turn on the electric mosquito swatter.

3. A low-power silent electric mosquito swatter circuit according to claim 2, characterized in that: The switch unit is also used for charging status prompt and mosquito killing status prompt; the status prompt output end of the charging management unit is electrically connected to the status prompt input end of the switch unit.

4. A low-power silent electric mosquito swatter circuit according to claim 1, characterized in that: The DC / DC buck unit includes a capacitor C1, a capacitor C2, a DC / DC buck chip U1, an inductor L1, a resistor R3, a resistor R4 and a diode D5; the VIN terminal of the DC / DC buck chip U1 is used as the input terminal of the DC / DC buck unit, and the cathode of the diode D5 is used as the output terminal of the DC / DC buck unit; One end of the capacitor C1 and the EN end of the DC / DC buck chip U1 are electrically connected to the VIN end of the DC / DC buck chip U1, the other end of the capacitor C1 and the GND end of the DC / DC buck chip U1 are grounded, the SW end of the DC / DC buck chip U1 is electrically connected to one end of the inductor L1, the other end of the inductor L1, one end of the resistor R3, and one end of the capacitor C2 are electrically connected to the anode of the diode D5, the other end of the resistor R3 and one end of the resistor R4 are electrically connected to the FB end of the DC / DC buck chip U1, and the other end of the resistor R4 and the other end of the capacitor C2 are electrically connected to the GND end of the DC / DC buck chip U1.

5. A low-power silent electric mosquito swatter circuit according to claim 1, characterized in that: The boost unit includes a first boost circuit, a boost transformer T1 and a second boost circuit; the input end of the first boost circuit is used as the input end of the boost unit, and the output end of the second boost circuit is used as the output end of the boost unit; The first output terminal, the second output terminal and the third output terminal of the first boost circuit are electrically connected to the first winding opposite-name terminal, the first winding same-name terminal and the second winding opposite-name terminal of the primary side of the boost transformer T1, respectively, and the second winding same-name terminal of the primary side of the boost transformer T1 is grounded; The first input terminal and the second input terminal of the second boost circuit are electrically connected to the same-name terminal and the opposite-name terminal of the secondary side of the boost transformer T1 respectively; The first boost circuit is used to receive the reference grid voltage, coupled with the primary side self-excited oscillation boost of the boost transformer T1, and generate a self-excited grid voltage; The second boost circuit is used to receive the self-excited grid voltage, coupled to the secondary side of the boost transformer T1, boost the voltage according to a preset boost multiple, and generate the grid voltage; The preset boost value=the boost value of the self-excited oscillation boost*the preset boost multiple.

6. A low-power silent electric mosquito swatter circuit according to claim 3, characterized in that: The switch unit includes a switch element, a diode D4, a resistor R5, a resistor R6, a light emitting diode LED2 and a light emitting diode LED3; one end of the switch element is used as an input end of the switch unit, the other end of the switch element is used as an output end of the switch unit, and the cathode of the light emitting diode LED2 is used as a status prompt input end of the switch unit; The anode of the diode D4 is electrically connected to the other end of the switch element, the cathode of the diode D4 is electrically connected to one end of the resistor R6, the other end of the resistor R6, one end of the resistor R5, and the anode of the light emitting diode LED3 are all electrically connected to the anode of the light emitting diode LED2, the cathode of the light emitting diode LED3 is grounded, and the other end of the resistor R5 is connected to the VCC power supply; The switch element is a reset switch or a self-locking switch.

7. A low-power silent electric mosquito swatter circuit according to claim 5, characterized in that: The first boost circuit includes a capacitor C4, a transistor Q1 and a resistor R7; the positive electrode of the capacitor C4 is used as the input end of the first boost circuit, the collector of the transistor Q1 is used as the first output end of the first boost circuit, one end of the resistor R7 is used as the second output end of the first boost circuit, and the emitter of the transistor Q1 is used as the third output end of the first boost circuit; The positive electrode of the capacitor C4 is electrically connected to the collector of the transistor Q1 , the base of the transistor Q1 is electrically connected to the other end of the resistor R7 , and the negative electrode of the capacitor C4 is grounded.

8. The low-power silent electric mosquito swatter circuit according to claim 5, characterized in that: The second boost circuit includes a capacitor C3, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a diode D3, a resistor R9, a resistor R10 and a resistor R11; an anode of the diode D3 is used as a first input terminal of the second boost circuit, one end of the capacitor C3 is used as a second input terminal of the second boost circuit, and one end and the other end of the capacitor C6 are used as output terminals of the second boost circuit; One end of the capacitor C5 is electrically connected to the anode of the diode D3, the cathode of the diode D3, one end of the resistor R11, and one end of the capacitor C6 are all electrically connected to the other end of the capacitor C3, one end of the capacitor C3 is electrically connected to the cathode of the diode D2, the anode of the diode D2 and the other end of the capacitor C5 are all electrically connected to the cathode of the diode D1, the anode of the diode D1 and one end of the resistor R10 are all electrically connected to the other end of the capacitor C6, the other end of the resistor R11 is electrically connected to one end of the resistor R9, and the other end of the resistor R9 is electrically connected to the other end of the resistor R10.

9. The low-power silent electric mosquito swatter circuit according to claim 3, characterized in that: The charging management unit includes a resistor R1, a resistor R2, a capacitor C7, a capacitor C8 and a charging chip U2; one end of the resistor R1 and the VIN end of the charging chip U2 are both used as input ends of the charging management unit, the STAT1 end of the charging chip U2 is used as a status prompt output end of the charging management unit, and the BAT end of the charging chip U2 is used as an output end of the charging management unit; The other end of the resistor R1 is electrically connected to the ISET end of the charging chip U2, the VSS end of the charging chip U2 is grounded, one end of the resistor R2 is electrically connected to the VIN end of the charging chip U2, the other end of the resistor R2 is electrically connected to one end of the capacitor C8, the BAT end of the charging chip U2 is electrically connected to one end of the capacitor C7, and the other end of the capacitor C8 and the other end of the capacitor C7 are both grounded.

10. A low-power silent electric mosquito swatter circuit according to claim 2, characterized in that: The gear selection unit is a multi-gear switch.

Images