Negative ion generation circuit, system, and home appliance

Abstract

This invention discloses a negative ion generating circuit, system, and household appliance; belonging to the field of negative ions; under the control of a pulse oscillation unit, a boost unit boosts the input voltage of the input unit, and then obtains high voltage under the action of a voltage doubler rectifier and protection circuit, thereby increasing the negative ion concentration; the single negative electrode of the output unit discharges, and because a current limiting unit is set between the single negative electrode and the voltage doubler rectifier and protection circuit, the current at the single negative electrode can be reduced, thus suppressing ozone. Simultaneously, the connection point between the current limiting unit and the voltage doubler rectifier and protection unit is grounded, which can consume positive ions and eliminate static electricity.

Description

Technical Field

[0001] This invention relates to the field of negative ions, and in particular to a negative ion generating circuit, system, and household appliance. Background Technology

[0002] Negative ions have positive physiological significance for life activities in nature. They are as indispensable as vitamins in food, so people call them "air vitamins".

[0003] Currently, negative ion generators are widely used in public places to improve the air environment, as well as in home appliances with functions such as air purification, sterilization, disinfection, preservation, and deodorization, such as refrigerators, air conditioners, and air purifiers.

[0004] Most existing ion generators are dual-electrode negative ion generators or plasma generators. Their ion generation principle generally involves a power input that is boosted by a high-voltage circuit to obtain a high-voltage source, followed by corona discharge at the output electrode and the release of negative ions by an ion release needle. To achieve a high negative ion concentration in existing ion generators, a voltage needs to be provided at the output electrode. However, if the output electrode voltage is too high, the corona effect becomes too strong, and the negative ion generator will produce ozone. To avoid excessive ozone production, the voltage at the output electrode needs to be controlled within a certain range. At this level, the negative ion generator's negative ion production effect is generally limited, failing to simultaneously increase the negative ion concentration and suppress ozone. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention provides a negative ion generating circuit, system, and household appliance to solve the problem that existing negative ion generators cannot suppress ozone while increasing negative ion concentration.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] Firstly,

[0008] A negative ion generating circuit includes an input unit, a pulse oscillation unit, a boost unit, a voltage multiplier rectifier and protection unit, and an output unit; the input unit and the pulse oscillation unit are connected to the input terminal of the boost unit, the output terminal of the boost unit is connected to the voltage multiplier rectifier and protection unit, and the voltage multiplier rectifier and protection unit is connected to the output unit;

[0009] The output unit includes a single negative electrode; a current limiting unit is provided between the single negative electrode and the voltage doubler rectifier and protection unit; the connection point between the current limiting unit and the voltage doubler rectifier and protection unit is grounded.

[0010] Furthermore, a first diode is provided between the connection point and the ground, the anode of the first diode is connected to the connection point, and the cathode of the first diode is grounded.

[0011] Furthermore, a first resistor for absorbing the output unit current is connected between the connection point and the first diode.

[0012] Furthermore, the boost unit includes a transformer, one end of the primary winding of the transformer is connected to the input unit, and the other end is connected to the pulse oscillation unit through a switching transistor; the secondary winding of the transformer is connected to the voltage multiplier rectifier and protection unit.

[0013] The other end of the primary winding is connected to the anode of the second diode at the connection point with the switching transistor. The cathode of the second diode is connected to one end of the first capacitor, and the other end of the first capacitor is connected to one end of the primary winding. A second resistor is connected in parallel across the two ends of the first capacitor.

[0014] Furthermore, the transformer is a single-winding transformer.

[0015] Furthermore, the voltage doubler rectifier and protection unit includes a second capacitor. One end of the second capacitor is connected to one terminal of the output terminal of the boost unit, and the other terminal of the output terminal of the boost unit is connected to the anode of the first diode. The other end of the second capacitor is connected to the cathode of the third diode. The anode of the third diode is connected to a single negative electrode through the current limiting unit. The anode of the third diode is connected to the other terminal of the output terminal of the boost unit through the third capacitor. The connection between the second capacitor and the third diode is connected to the anode of a fourth diode, and the cathode of the fourth diode is connected to the anode of the first diode.

[0016] Furthermore, the current limiting unit is a resistor.

[0017] Secondly,

[0018] A negative ion generating system, comprising the circuit described in any one of the first aspects of the technical solution.

[0019] Thirdly,

[0020] A household appliance comprising the circuit described in any one of the first aspects of the technical solution.

[0021] Furthermore, the household appliance includes any one of the following:

[0022] refrigerator;

[0023] air conditioner;

[0024] Air purifier.

[0025] Beneficial effects:

[0026] This application provides a negative ion generating circuit, system, and household appliance. Under the control of a pulse oscillation unit, a boost unit boosts the input voltage of the input unit, and then, under the action of a voltage doubler rectifier and protection circuit, a high voltage is obtained, increasing the negative ion concentration. The single negative electrode of the output unit discharges; because a current-limiting unit is set between the single negative electrode and the voltage doubler rectifier and protection circuit, the current at the single negative electrode can be reduced, suppressing ozone. Simultaneously, the connection point between the current-limiting unit and the voltage doubler rectifier and protection unit is grounded, which can consume positive ions and eliminate static electricity. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a negative ion generating circuit structure provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of a specific negative ion generating circuit structure provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a pulse oscillation circuit structure provided in an embodiment of the present invention;

[0031] Figure 4 This is a circuit structure diagram of a voltage doubler rectifier and protection unit and an output unit provided in an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Reference Figure 1 This invention provides a negative ion generating circuit, including an input unit, a pulse oscillation unit, a boost unit, a voltage doubler rectifier and protection unit, and an output unit; the input unit and the pulse oscillation unit are connected to the input terminal of the boost unit, the output terminal of the boost unit is connected to the voltage doubler rectifier and protection unit, and the voltage doubler rectifier and protection unit is connected to the output unit;

[0034] The output unit includes a single negative electrode; a current limiting unit is provided between the single negative electrode and the voltage doubler rectifier and protection unit; the connection point between the current limiting unit and the voltage doubler rectifier and protection unit is grounded.

[0035] This invention provides a negative ion generating circuit. Under the control of a pulse oscillation unit, a boost unit boosts the input voltage of the input unit, and then, under the action of a voltage doubler rectifier and protection circuit, a high voltage is obtained, increasing the negative ion concentration. The single negative electrode of the output unit discharges. Because a current-limiting unit is set between the single negative electrode and the voltage doubler rectifier and protection circuit, the current at the single negative electrode can be reduced, suppressing ozone. Simultaneously, the connection point between the current-limiting unit and the voltage doubler rectifier and protection unit is grounded, which can consume positive ions and eliminate static electricity.

[0036] As a supplementary explanation to the above embodiments, this embodiment of the invention provides a specific negative ion generating circuit, such as... Figures 2-4 As shown, it includes an input unit, a pulse oscillation unit, a boost unit, a voltage doubler rectifier and protection unit, and an output unit; the input unit and the pulse oscillation unit are connected to the input terminal of the boost unit, the output terminal of the boost unit is connected to the voltage doubler rectifier and protection unit, and the voltage doubler rectifier and protection unit is connected to the output unit;

[0037] The output unit includes a single negative electrode Uo; a current limiting unit is provided between the single negative electrode Uo and the voltage doubler rectifier and protection unit; the connection point between the current limiting unit and the voltage doubler rectifier and protection unit is grounded. Preferably, the current limiting unit is a current limiting resistor R4.

[0038] like Figure 4 As shown, a first diode D1 is installed between the connection point of the current-limiting resistor R4 and the voltage multiplier rectifier and protection unit and ground. The anode of the first diode D1 is connected to the connection point, and the cathode of the first diode D1 is grounded. The first diode D1 is installed to allow positive ions to be grounded smoothly and to prevent negative ions from being grounded through the first diode D1, thus consuming positive ions and preventing the concentration of negative ions from decreasing.

[0039] A first resistor R1 is connected between the current-limiting resistor R4 and the connection point of the voltage multiplier rectifier and protection unit and the first diode D1 to absorb the current of the output unit. The first resistor R1 is set to share the current of the single negative electrode Uo, so that the current through the single negative electrode Uo is reduced. Then, the current through the current-limiting resistor R4 further reduces the current of the single negative electrode Uo, thereby reducing the corona effect at the single negative electrode Uo and reducing the amount of ozone generated.

[0040] like Figure 2 As shown, the boost unit includes a transformer T1. One end of the primary winding of transformer T1 is connected to the input unit, and the other end is connected to the pulse oscillation unit through the switching transistor BG1. The secondary winding of transformer T1 is connected to the voltage multiplier rectifier and protection unit.

[0041] The other end of the primary winding is connected to the anode of the second diode D2 at the connection point of the switching transistor BG1. The cathode of the second diode D2 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is connected to one end of the primary winding. A second resistor R2 is connected in parallel across the two ends of the first capacitor C1.

[0042] Figure 2 The boost circuit is an RCD clamping boost circuit. The first capacitor C1 and the second resistor R2 are used to absorb and dissipate the magnetizing inductance energy and leakage inductance energy of the primary side of transformer T1. The second diode D2 is used for voltage clamping. This RCD clamping boost circuit can effectively solve the problem of magnetizing inductance energy and leakage inductance energy of the transformer primary side. Preferably, transformer T1 is a single-winding transformer, which reduces the design difficulty of the high-voltage source.

[0043] like Figure 3 As shown, the pulse oscillation circuit is an astable multivibrator composed of the NE555 timer IC chip and its peripheral components. The oscillation frequency is determined by the resistors RA and RB, and the capacitor C2 connected to pins 2 and 6 of the NE555 IC chip, calculated as f = 1.443 / (RA + 2RB) * C2. The generated high-frequency square wave pulse signal is output from pin 3 of the NE555 IC chip, controlling the switching transistor BG1 to turn on.

[0044] like Figure 4 As shown, Ui is the output terminal of the boost unit, which has two ports. The voltage doubler rectification and protection unit includes a second capacitor C. One end of the second capacitor C is connected to one terminal a of the boost unit output terminal, and the other terminal b of the boost unit output terminal is connected to the anode of the first diode D1. The other end of the second capacitor C is connected to the cathode of the third diode D3. The anode of the third diode D3 is connected to a single negative electrode Uo through a current limiting unit. The anode of the third diode D3 is connected to the other terminal b of the boost unit output terminal through the third capacitor C4. The connection between the second capacitor C and the third diode D3 is connected to the anode of the fourth diode D4. The cathode of the fourth diode D4 is connected to the anode of the first diode D1. In the voltage doubler rectification and protection unit, the negative ion flow direction when the third diode D3 is conducting is: boost unit output terminal Ui → second capacitor C → third diode D3 → output. The negative ion flow circuit when the fourth diode D4 is conducting is: boost unit output terminal b → fourth diode D4 → second capacitor C → boost unit output terminal a.

[0045] This invention provides a specific negative ion generating circuit. The output of a pulse oscillation unit is connected to a boost circuit via a switching transistor, controlling the transistor to conduct. This provides an induced electromotive force to increase the DC low voltage, completing the electromagnetic conversion boosting process. In the boost unit, the second resistor, first capacitor, and second diode absorb the energy of the buffer circuit, storing the energy from the transformer primary excitation and leakage inductance in the first capacitor, which is then dissipated through the second resistor. A voltage doubler rectifier and protection unit is connected after the boost unit. The peak voltage is achieved through the charging / discharging of the high-voltage energy-storing second capacitor and the conduction / cutoff of the third and fourth diodes. A current-limiting resistor R4 is connected in series with the single negative electrode to limit the current flowing through the release device. This resistor is then connected in parallel with the first resistor at the output terminal to form an output circuit. The first resistor absorbs the current in the output circuit, protecting the electrical performance of the circuit and eliminating static electricity. The first diode is grounded to consume the output positive ions.

[0046] In one embodiment, the present invention also provides a negative ion generating system, including the circuit provided in any of the above embodiments.

[0047] The negative ion generating system provided in this embodiment of the invention, under the control of the pulse oscillation unit, uses a boost unit to boost the input voltage of the input unit, and then obtains high voltage under the action of a voltage doubler rectifier and protection circuit, thereby increasing the negative ion concentration. The single negative electrode of the output unit discharges; because a current limiting unit is set between the single negative electrode and the voltage doubler rectifier and protection circuit, the current at the single negative electrode can be reduced, thus suppressing ozone. Simultaneously, the connection point between the current limiting unit and the voltage doubler rectifier and protection unit is grounded, which can consume positive ions and eliminate static electricity.

[0048] In one embodiment, the present invention also provides a household appliance including the circuitry provided in any of the above embodiments. The household appliance includes, but is not limited to, refrigerators, air conditioners, and air purifiers.

[0049] The household appliance provided in this invention features a single-electrode output design. The output electrode controls the output current by increasing the output resistance, thereby suppressing ozone. The power ground serves as a reference electrode to absorb and neutralize static electricity within the appliance. An additional output circuit is added to eliminate static electricity in the circuit. An RCD clamping boost circuit and a double rectifier circuit constitute the high-voltage source output, thus reducing the overall design complexity of the high-voltage source. This design increases the generation of negative ions to eliminate static electricity and protect electrical performance; it also reduces the size of the high-voltage source transformer and increases the amplification factor. Ozone is suppressed while maintaining the concentration of negative ions.

[0050] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0051] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means at least two.

[0052] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0053] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0054] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0055] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0056] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A negative ion generating circuit, comprising an input unit, a pulse oscillation unit, a boost unit, a voltage multiplier rectifier and protection unit, and an output unit; wherein the input unit and the pulse oscillation unit are connected to the input terminal of the boost unit, the output terminal of the boost unit is connected to the voltage multiplier rectifier and protection unit, and the voltage multiplier rectifier and protection unit is connected to the output unit, characterized in that: The output unit includes a single negative electrode; a current limiting unit is provided between the single negative electrode and the voltage doubler rectifier and protection unit; the connection point between the current limiting unit and the voltage doubler rectifier and protection unit is grounded; A first diode is provided between the connection point and the ground, the anode of the first diode is connected to the connection point, and the cathode of the first diode is grounded; A first resistor for absorbing the output unit current is connected between the connection point and the first diode.

2. The circuit according to claim 1, characterized in that: The boost unit includes a transformer, one end of the primary winding of the transformer is connected to the input unit, and the other end is connected to the pulse oscillation unit through a switching transistor; the secondary winding of the transformer is connected to the voltage multiplier rectifier and protection unit. The other end of the primary winding is connected to the anode of the second diode at the connection point with the switching transistor. The cathode of the second diode is connected to one end of the first capacitor, and the other end of the first capacitor is connected to one end of the primary winding. A second resistor is connected in parallel across the two ends of the first capacitor.

3. The circuit according to claim 2, characterized in that: The transformer is a single-winding transformer.

4. The circuit according to claim 1, characterized in that: The voltage multiplier rectifier and protection unit includes a second capacitor. One end of the second capacitor is connected to one terminal of the output terminal of the boost unit, and the other terminal of the output terminal of the boost unit is connected to the anode of the first diode. The other end of the second capacitor is connected to the cathode of the third diode. The anode of the third diode is connected to a single negative electrode through the current limiting unit. The anode of the third diode is connected to the other terminal of the output terminal of the boost unit through the third capacitor. The connection between the second capacitor and the third diode is connected to the anode of a fourth diode, and the cathode of the fourth diode is connected to the anode of the first diode.

5. The circuit according to claim 1, characterized in that: The current limiting unit is a resistor.

6. A negative ion generating system, characterized in that: Includes the circuit described in any one of claims 1-5.

7. A household appliance, characterized in that: Includes the circuit described in any one of claims 1-5.

8. The household appliance according to claim 7, characterized in that: The household appliance includes any one of the following: refrigerator; air conditioner; Air purifier.

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