CN213906988U

CN213906988U - Preheating starting circuit for electronic ballast of ultraviolet UV lamp

Info

Publication number: CN213906988U
Application number: CN202022841925.2U
Authority: CN
Inventors: 李国俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-08-06
Anticipated expiration: 2030-11-30

Abstract

The utility model provides an ultraviolet UV lamp electronic ballast preheats starting circuit relates to electronic ballast and preheats the start-up field. The switching circuit comprises a frequency switching circuit, a switching control circuit and a chip; the chip is connected with the frequency switching circuit, and the control end of the frequency switching circuit is connected with the switching control circuit; the switching control circuit is used for controlling the frequency switching circuit according to the electrifying state; the frequency switching circuit is used for changing the output electric signal according to the control of the switching control circuit; the chip is used for outputting a preheating starting signal according to the electric signal. The working state of the first field effect transistor in the frequency switching circuit can be controlled by switching the conduction state of the second field effect transistor in the control circuit in a delayed manner, so that the resistance value of the frequency switching circuit is controlled to change, the electric signal of the first pin of the chip is changed, the preheating frequency is switched, and the preheating starting effect of the electronic ballast is realized.

Description

Preheating starting circuit for electronic ballast of ultraviolet UV lamp

Technical Field

The utility model relates to a preheat starting circuit technical field, particularly, relate to an ultraviolet ray UV lamp electronic ballast preheats starting circuit.

Background

With the rapid development of lighting engineering, general lighting has been transiting from the age of discharge lamps to the age of LED solid state lighting, resulting in the entire industry chain being inclined to the LED industry chain. However, in some special fields, such as the field of UV lamps, the conventional electronic ballast is still needed to light up for the UV lamps, but since the whole industry chain is prone to the change of the LED industry chain, the chip dedicated to the electronic ballast is almost off-production, and if the chip dedicated to the electronic ballast is not used or the simplified electronic ballast chip cannot provide a preheating start process for the UV lamp electronic ballast, it is impossible to provide a proper preheating time, preheating frequency and operating frequency for the UV lamp ballast.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultraviolet ray UV lamp electronic ballast preheats starting circuit, it can provide suitable preheating time, preheating frequency and operating frequency for the electronic ballast of ultraviolet ray UV lamp to realize starting the life-span of ultraviolet ray UV lamp and extension ultraviolet ray UV lamp better.

The embodiment of the utility model is realized like this:

the embodiment of the application provides a preheating starting circuit of an electronic ballast of an ultraviolet UV lamp, which comprises a frequency switching circuit, a switching control circuit and a chip; the chip is connected with the frequency switching circuit, and the control end of the frequency switching circuit is connected with the switching control circuit; the switching control circuit is used for controlling the frequency switching circuit according to the electrifying state; the frequency switching circuit is used for changing the output electric signal according to the control of the switching control circuit; the chip is used for outputting a preheating starting signal according to the electric signal. The working state of the first field effect transistor in the frequency switching circuit can be controlled by switching the conduction state of the second field effect transistor in the control circuit in a delayed manner, so that the resistance value of the frequency switching circuit is controlled to change, the electric signal of the first pin of the chip is changed, the preheating frequency is switched, and the preheating starting effect of the electronic ballast is realized.

In some embodiments of the utility model, above-mentioned ultraviolet UV lamp electronic ballast preheats starting circuit, frequency switching circuit includes first resistance, second resistance and first field effect transistor, and the one end of first resistance is connected with the first pin of chip, and the other end of first resistance is connected with the source electrode of first field effect transistor, and the one end of second resistance is connected with the first pin of chip, and the other end of second resistance is connected with the drain electrode of first field effect transistor, and the grid and the switching control circuit of first field effect transistor are connected. The working state of the first field effect transistor is controlled by the switching control circuit, and the different working states of the first field effect transistor determine the resistance value of the frequency switching circuit, so that the electric signal of the first pin of the chip is changed, and the effect of switching the preheating starting frequency is realized.

In some embodiments of the present invention, the electronic ballast of the ultraviolet UV lamp preheats the start circuit, and the frequency switching circuit further includes a diode, an anode of the diode is connected to the first resistor, and a cathode of the diode is connected to the second resistor. According to the characteristic of unidirectional conduction of the diode, the diode can protect the circuit to normally work.

In some embodiments of the present invention, the above-mentioned electronic ballast of ultraviolet UV lamp preheats the starting circuit, and the frequency switching circuit further includes a first capacitor, one end of the first capacitor is connected to a first resistor, and the other end of the first capacitor is grounded.

In some embodiments of the present invention, the above-mentioned electronic ballast preheating starting circuit for ultraviolet UV lamp, the switching control circuit includes a second field effect transistor, a second capacitor and a third resistor, the drain of the second field effect transistor is connected to the frequency switching circuit, and the gate of the second field effect transistor is connected to the common terminal of the second capacitor and the third resistor. The working state of the second field effect transistor determines the working state of the first field effect transistor, and when the second field effect transistor is switched on, the first field effect transistor is cut off, so that the resistance value of the frequency switching circuit is changed, the electric signal of the first pin of the chip is changed, and the purpose of switching the preheating frequency is achieved.

In some embodiments of the present invention, the above-mentioned electronic ballast of ultraviolet UV lamp preheats the starting circuit, and the switching control circuit further includes a fourth resistor, and one end of the fourth resistor is connected to the drain of the second field effect transistor.

In some embodiments of the present invention, the above-mentioned electronic ballast of ultraviolet UV lamp preheats the starting circuit, and the switching control circuit further includes a fifth resistor, one end of the fifth resistor is connected to the third resistor, and the other end of the fifth resistor is grounded. And the fifth resistor is used for completing the switching of the working state of the second field effect transistor together with the third resistor and the second capacitor.

In some embodiments of the utility model, above-mentioned ultraviolet UV lamp electronic ballast preheats starting circuit, preheats starting circuit and still includes protection circuit, and protection circuit is connected with switching control circuit to be used for the protection switching control circuit. When the power is switched on, the protection circuit does not influence the normal work of the frequency switching circuit and the switching control circuit, and when the power is switched off, the protection circuit carries out discharging operation on the second capacitor, so that the second capacitor is in a discharging state, and the purpose of protecting the switching control circuit is achieved.

The utility model discloses an in some embodiments, above-mentioned ultraviolet UV lamp electronic ballast preheats starting circuit, protection circuit include triode, sixth resistance and seventh resistance, and the public end of sixth resistance and seventh resistance is connected to the base of triode, and the projecting pole of triode is connected with switching control circuit's control end, the collecting electrode ground connection of triode. When the protection circuit is powered on, the triode is cut off, the protection circuit is in a non-working state, when the protection circuit is powered off, the triode is switched on, the protection circuit carries out discharging operation on the second capacitor, and the second capacitor is in a discharging state, so that the purpose of protecting the switching control circuit is achieved.

In some embodiments of the present invention, the above-mentioned ultraviolet UV lamp electronic ballast preheats the starting circuit, and the chip is a simplified electronic ballast chip. The simplified electronic ballast chip is different from a chip special for an electronic ballast, has a simple structure, is mainly used for converting the change of an electric signal into a signal with changed preheating frequency, and needs to be matched with an ultraviolet UV lamp electronic ballast preheating starting circuit to realize the preheating starting effect on the electronic ballast.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a block diagram of a preheating start circuit of an electronic ballast of an ultraviolet UV lamp provided by the present invention;

fig. 2 is a circuit diagram of an electronic ballast preheating starting circuit of an ultraviolet UV lamp provided by the present invention.

Icon: 1-a frequency switching circuit; 2-a switching control circuit; 3-a protection circuit; 4-chip.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", etc. are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit element comprising a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit element. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in a circuit comprising the element.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.

Because the ultraviolet UV lamp belongs to a gas discharge lamp, an electronic ballast is needed to be matched with the ultraviolet UV lamp for lighting, the electronic ballast matched with the UV lamp needs to finish various complicated working processes of preheating, starting, normal working and abnormal states, and if a special chip of the electronic ballast is not adopted or a simple electronic ballast chip is used, various working processes of the electronic ballast are difficult to finish. However, the chip dedicated to the electronic ballast is not only expensive, but also almost in a production stop state due to the rapid development of the lighting industry chain. In order to improve the above problems, the present application provides several embodiments described below.

Referring to fig. 1, fig. 1 is a block diagram of a preheating start circuit of an electronic ballast for an ultraviolet UV lamp according to the present invention. A preheating starting circuit of an electronic ballast of an ultraviolet UV lamp comprises a frequency switching circuit 1, a switching control circuit 2 and a chip 4; the chip 4 is connected with the frequency switching circuit 1, and the control end of the frequency switching circuit 1 is connected with the switching control circuit 2; the switching control circuit 2 is used for controlling the frequency switching circuit 1 according to the power-on state; the frequency switching circuit 1 is used for changing an output electric signal according to the control of the switching control circuit 2; the chip 4 is used for outputting a preheating starting signal according to the electric signal. The switching control circuit 2 controls the operating state of the second fet Q2 according to the power-on state to control the frequency switching circuit 1, the frequency switching circuit 1 changes the operating state of the first fet Q1 according to the control of the switching control circuit 2 to switch the resistance value and change the output electrical signal, and the chip 4 outputs the preheating start signal according to the electrical signal of the frequency switching circuit 1. In this way, this preheat starting circuit controls frequency switching circuit 1's operating condition through switching control circuit 2's operating condition, and then changes frequency switching circuit 1's resistance for chip 4's the signal of telecommunication changes, thereby switches preheating frequency, has realized the start-up effect of preheating to electronic ballast.

Wherein, the chip 4 is a simplified electronic ballast chip. The simplified electronic ballast chip is different from a chip special for the electronic ballast, the chip special for the electronic ballast is high in price and complex in structure, and the preheating starting effect of the electronic ballast can be realized without a peripheral hardware circuit. The simplified electronic ballast chip has a simple structure, is mainly used for converting a changed electric signal into a signal with changed preheating frequency, and cannot realize the preheating starting effect of the electronic ballast if the chip is not matched with the preheating starting circuit of the ultraviolet UV lamp electronic ballast for use.

In this embodiment, the simplified electronic ballast chip is selected as 3124.

Referring to fig. 2, fig. 2 is a circuit diagram of a preheating start circuit of an electronic ballast for an ultraviolet UV lamp according to the present invention. The frequency switching circuit 1 comprises a first resistor R1, a second resistor R2 and a first field effect transistor Q1, wherein one end of the first resistor R1 is connected with a first pin of the chip 4, the other end of the first resistor R1 is connected with a source electrode of the first field effect transistor Q1, one end of the second resistor R2 is connected with the first pin of the chip 4, the other end of the second resistor R2 is connected with a drain electrode of the first field effect transistor Q1, and a gate electrode of the first field effect transistor Q1 is connected with the switching control circuit 2. The frequency switching circuit 1 is connected in the above manner, the working state of the first fet Q1 is determined by the switching control circuit 2, the resistance value of the frequency switching circuit 1 is determined by the working state of the first fet Q1, and the change in the resistance value of the frequency switching circuit 1 changes the electrical signal of the chip 4, thereby achieving the effect of switching the preheating start frequency.

In this embodiment, the RT pin, the CT pin, and the COM pin of the chip 4 are the first pin, the second pin, and the ground pin, respectively.

As a specific implementation manner in this embodiment, the frequency switching circuit 1 further includes a diode D1, an anode of the diode D1 is connected to the first resistor R1, and a cathode of the diode D1 is connected to the second resistor R2. Since the diode D1 has the characteristic of unidirectional conduction, when energized, the diode D1 can protect the circuit from normal operation.

The frequency switching circuit 1 further includes a first capacitor C1, one end of the first capacitor C1 is connected to the first resistor R1, and the other end of the first capacitor C1 is grounded.

As another specific implementation manner in this embodiment, the switching control circuit 2 includes a second fet Q2, a second capacitor C2, and a third resistor R3, a drain of the second fet Q2 is connected to the frequency switching circuit 1, and a gate of the second fet Q2 is connected to a common terminal of the second capacitor C2 and the third resistor R3. Through the connection mode, after the power is switched on, the second field effect transistor Q2 is in a delay conduction state, when the threshold value of the second field effect transistor Q2 is reached, the second field effect transistor Q2 is conducted, the first field effect transistor Q1 is cut off, the resistance value of the frequency switching circuit 1 is changed into the resistance value of the first resistor R1 through the parallel resistance value of the first resistor R1 and the second resistor R2, so that the effect of switching the resistance value is achieved, the electric signal of the first pin of the chip is changed, and the purpose of switching the preheating frequency is achieved.

The switching control circuit 2 further includes a fourth resistor R4, and one end of the fourth resistor R4 is connected to the drain of the second fet Q2.

In this embodiment, the switching control circuit 2 further includes a fifth resistor R5, one end of the fifth resistor R5 is connected to the third resistor R3, and the other end of the fifth resistor R5 is grounded. Since the operating state of the second fet Q2 depends on the values of the third resistor R3 and the second capacitor C2, the fifth resistor R5 is used to complete the switching of the operating state of the second fet Q2 with the third resistor R3 and the second capacitor C2.

In order to ensure the normal work of the preheating starting circuit of the electronic ballast of the ultraviolet UV lamp, the preheating starting circuit of the electronic ballast of the ultraviolet UV lamp further comprises a protection circuit 3, and the protection circuit 3 is connected with the switching control circuit 2 and used for protecting the switching control circuit 2. Specifically, when the power is turned on, the protection circuit 3 does not work nor affect the normal work of the frequency switching circuit 1 and the switching control circuit 2, and when the power is turned off, the protection circuit 3 performs a discharging operation on the second capacitor C2, so that the second capacitor C2 is in a discharging state, thereby achieving the purpose of protecting the switching control circuit 2.

Referring to fig. 2, the protection circuit 3 includes a transistor Q3, a sixth resistor R6 and a seventh resistor R7, a base of the transistor Q3 is connected to a common terminal of the sixth resistor R6 and the seventh resistor R7, an emitter of the transistor Q3 is connected to a gate of the second fet Q2, and a collector of the transistor Q3 is connected to the second capacitor C2. When the power is on, the triode Q3 is in a cut-off state, and the protection circuit 3 is in a non-working state; when power is off, the transistor Q3 is turned on, and the protection circuit 3 performs a discharging operation on the second capacitor C2, so that the second capacitor C2 is in a discharging state, thereby implementing the protection switching control circuit 2.

In the embodiments provided in the present application, it should be understood that the disclosed circuits and hardware may be implemented in other ways. The embodiments described above are merely illustrative, and for example, the circuit diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of circuits according to various embodiments of the present application. In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

To sum up, the ultraviolet ray UV lamp electronic ballast that this application embodiment provided preheats starting circuit includes chip 4, frequency switching circuit 1, switching control circuit 2 and protection circuit 3, the utility model discloses an ingenious design of peripheral circuit has realized utilizing the simplification electronic ballast chip to accomplish the preheating of ultraviolet ray UV lamp electronic ballast and has started. Specifically, the chip 4 is connected to the frequency switching circuit 1, the control terminal of the frequency switching circuit 1 is connected to the switching control circuit 2, and the gate of the second field effect transistor Q2 of the switching control circuit 2 is connected to the protection circuit 3. In this way, the preheating starting circuit changes the resistance value of the frequency switching circuit 1 through the switching control circuit 2, so that the electric signal of the first pin of the chip changes, and then the preheating frequency is switched, thereby realizing the purpose of providing proper preheating time, preheating frequency and working frequency for the ultraviolet UV lamp electronic ballast, and realizing the preheating starting effect on the electronic ballast.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A preheating starting circuit of an electronic ballast of an ultraviolet UV lamp is characterized by comprising a chip, a frequency switching circuit and a switching control circuit;

the chip is connected with the frequency switching circuit, and the control end of the frequency switching circuit is connected with the switching control circuit;

the switching control circuit is used for controlling the frequency switching circuit according to the power-on state;

the frequency switching circuit is used for changing an output electric signal according to the control of the switching control circuit;

the chip is used for outputting a preheating starting signal according to the electric signal.

2. The preheating starting circuit of an electronic ballast of an Ultraviolet (UV) lamp as claimed in claim 1, wherein the frequency switching circuit comprises a first resistor, a second resistor and a first field effect transistor, one end of the first resistor is connected to the first pin of the chip, the other end of the first resistor is connected to the source of the first field effect transistor, one end of the second resistor is connected to the first pin of the chip, the other end of the second resistor is connected to the drain of the first field effect transistor, and the gate of the first field effect transistor is connected to the switching control circuit.

3. The Ultraviolet (UV) lamp electronic ballast preheat start circuit as recited in claim 2, wherein the frequency switching circuit further comprises a diode, an anode of the diode is connected to the first pin of the chip, and a cathode of the diode is connected to the second resistor.

4. The Ultraviolet (UV) lamp electronic ballast preheat start circuit as recited in claim 2, wherein the frequency switching circuit further comprises a first capacitor, one end of the first capacitor is connected to the first resistor, and the other end of the first capacitor is grounded.

5. The electronic ballast preheat starting circuit for an Ultraviolet (UV) lamp as recited in claim 1, wherein the switching control circuit comprises a second field effect transistor, a second capacitor and a third resistor, a drain of the second field effect transistor is connected to the frequency switching circuit, and a gate of the second field effect transistor is connected to a common terminal of the second capacitor and the third resistor.

6. The Ultraviolet (UV) lamp electronic ballast preheating starting circuit as defined in claim 5, wherein the switching control circuit further comprises a fourth resistor, one end of the fourth resistor is connected with the drain of the second field effect transistor, and the other end of the fourth resistor is connected with an external power supply.

7. The Ultraviolet (UV) lamp electronic ballast preheat start circuit as recited in claim 5, wherein the switching control circuit further comprises a fifth resistor, one end of the fifth resistor is connected to the third resistor, and the other end of the fifth resistor is grounded.

8. The Ultraviolet (UV) lamp electronic ballast preheat start circuit of claim 1, wherein the preheat start circuit further comprises a protection circuit, the protection circuit being coupled to the switching control circuit for protecting the switching control circuit.

9. The Ultraviolet (UV) lamp electronic ballast preheat start circuit as recited in claim 8, wherein the protection circuit comprises a transistor, a sixth resistor and a seventh resistor, wherein a base of the transistor is connected to a common terminal of the sixth resistor and the seventh resistor, an emitter of the transistor is connected to the control terminal of the switching control circuit, and a collector of the transistor is grounded.

10. The Ultraviolet (UV) lamp electronic ballast preheat start circuit as recited in claim 1, wherein the chip is a simplified electronic ballast chip.