CN215644310U

CN215644310U - Relay switching power supply circuit and gas controller

Info

Publication number: CN215644310U
Application number: CN202121904865.2U
Authority: CN
Inventors: 李昌春
Original assignee: Shaoguan Jianuo Ignition System Co ltd
Current assignee: Shaoguan Jianuo Ignition System Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-01-25
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a relay switching power supply circuit and a gas controller. The circuit replaces an external power supply by a module consisting of a capacitor and a diode, and supplies stable driving voltage to the whole circuit through switching of a relay under different input voltages, so that the whole circuit can normally work when the input voltage fluctuates greatly, and the stability of the circuit can be improved; and the circuit is only composed of a few conventional devices such as a resistor, a capacitor, a diode, a triode, a relay and the like, so that the structure of the circuit can be simplified, the cost can be saved, meanwhile, software programming control can be avoided, and the practicability of the circuit is improved. The utility model can be widely applied to the technical field of gas controllers.

Description

Relay switching power supply circuit and gas controller

Technical Field

The utility model relates to the technical field of gas controllers, in particular to a relay switching power supply circuit and a gas controller.

Background

In the field of gas ignition controllers, the safety of gas ignition personnel is high, and therefore, the gas ignition controller needs to have high safety.

In the related art, in order to ensure the safety of the gas ignition controller, a voltage driving relay is usually provided by using a triode and a triode related circuit in a circuit of the gas ignition controller, so as to realize the safe operation of the gas ignition controller, but the triode circuit in the driving circuit needs an external power supply, and a contact of the relay does not participate in power supply, so that the whole circuit cannot stably work under the condition of large voltage fluctuation, and in the gas ignition controller, the input voltage often has certain instability, and the unstable input voltage possibly causes the relay not to normally work, so that the circuit of the gas ignition controller in the related art needs further improvement.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve at least one of the technical problems occurring in the related art to some extent.

Therefore, an object of the embodiments of the present invention is to provide a switching power supply circuit for a relay, in which a power supply is replaced by a module composed of a capacitor and a diode, so that the whole circuit can normally operate when an input voltage fluctuates greatly, and the stability of the circuit can be improved; and the circuit is only composed of a few conventional devices such as a resistor, a capacitor, a diode, a triode, a relay and the like, so that the structure of the circuit can be simplified, the cost can be saved, meanwhile, software programming control can be avoided, and the practicability of the circuit is improved.

In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the utility model comprises the following steps:

a relay switching power supply circuit comprises a relay, a first resistor, a second resistor, a third resistor, a first capacitor, a first triode, a first diode, a second diode, a third diode, a fourth diode, a first input end, a second input end, a first output end and a second output end;

the relay comprises a first pin, a second pin, a third pin, a fourth pin and a fifth pin;

the first input end is connected with the base electrode of the first triode after being connected with the first resistor in series; the emitting electrode of the first triode is grounded; a collector of the first triode is connected with the anode of the first diode and the second pin; the negative electrode of the first diode is connected with the fifth pin; the first pin is connected with the second input end; the third pin is connected with the third resistor in series and then is connected to the anode of the third diode; the cathode of the third diode is connected with the first end of the first capacitor; the cathode of the fourth diode is connected with the cathode of the third diode; the cathode of the first diode is connected with the cathode of the fourth diode; the second end of the first capacitor is grounded with the anode of the fourth diode; the fourth pin and the second resistor are connected in series to the anode of the second diode, and the cathode of the second diode is connected with the cathode of the fourth diode; the first output end is connected with the fourth pin; the second output end is connected with the third pin.

In addition, the relay switching power supply circuit according to the above embodiment of the present invention may further have the following additional technical features:

optionally, in an embodiment of the present invention, the first transistor is an NPN transistor or a PNP transistor.

Optionally, in an embodiment of the present invention, the first diode is a switching diode.

Optionally, in an embodiment of the present invention, the fourth diode is a zener diode; the fourth diode is used for stabilizing the voltage at two ends of the first capacitor.

Optionally, in an embodiment of the present invention, the first capacitor is an electrolytic capacitor; the first end is the anode of the electrolytic capacitor; the second end is the negative electrode of the electrolytic capacitor.

Optionally, in an embodiment of the present invention, the second diode and the third diode are rectifier diodes; the second diode is used for rectifying a branch where the second resistor is located; and the third diode is used for rectifying the branch where the third resistor is located.

In addition, the embodiment of the utility model also provides a fuel gas controller, which comprises at least one relay switching power supply circuit in the embodiment.

Advantages and benefits of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model:

the relay switching power supply circuit in the embodiment of the utility model replaces an external power supply by a module consisting of a capacitor and a diode, and provides stable driving voltage for the whole circuit through relay switching under different input voltages, so that the whole circuit can normally work when the input voltage fluctuates greatly, and the stability of the circuit can be improved; and the circuit is only composed of a few conventional devices such as a resistor, a capacitor, a diode, a triode, a relay and the like, so that the structure of the circuit can be simplified, the cost can be saved, meanwhile, software programming control can be avoided, and the practicability of the circuit is improved.

Drawings

Fig. 1 is a schematic circuit diagram of a switching power supply circuit of a relay according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "distance", "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, a relay switching power supply circuit is provided in an embodiment of the present application, and may include a relay K1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first transistor Q1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first input terminal, a second input terminal, a first output terminal, and a second output terminal; the relay K1 may include a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first input end is connected with a first resistor R1 in series and then is connected to the base of a first triode Q1; the emitter of the first triode Q1 is grounded; the collector of the first triode Q1 is connected with the anode of the first diode D1 and the second pin; the negative electrode of the first diode D1 is connected with the fifth pin; the first pin is connected with the second input end; the third pin is connected with a third resistor R3 in series and then is connected to the anode of a third diode D3; the cathode of the third diode D3 is connected with the first end of the first capacitor C1; the cathode of the fourth diode D4 is connected with the cathode of the third diode D3; the cathode of the first diode D1 is connected with the cathode of the fourth diode D4; a second end of the first capacitor C1 and the anode of the fourth diode D4 are grounded; the fourth pin and the second resistor R2 are connected in series to the anode of the second diode D2, and the cathode of the second diode D2 is connected with the cathode of the fourth diode D4; the first output end is connected with the fourth pin; the second output end is connected with the third pin. In some embodiments of the present application, the first transistor Q1 may be an NPN transistor or a PNP transistor, and the internal structure of the PNP transistor is different from that of the NPN transistor, but the PNP transistor and the NPN transistor have the same function in the circuit, so that the PNP transistor is selected in some embodiments of the present application, and the corresponding driving circuit of the PNP transistor also needs to be changed accordingly; in other embodiments of the present application, the first diode D1 may be a selective switching diode, such as a conventional 1N4148 type diode, and in other embodiments of the present application, the fourth diode D4 may be a zener diode; the zener diode can stabilize the voltage applied across the first capacitor C1; in some embodiments of the present application, the first capacitor C1 is an electrolytic capacitor; the first end of the first capacitor C1 is the anode of the electrolytic capacitor; the second end of the first capacitor C1 is the negative electrode of the electrolytic capacitor; in other embodiments of the present application, the second diode D2 and the third diode D3 may each be a rectifier diode, such as a 1N4007 model diode; the second diode D2 can rectify the branch in which the second resistor R2 is located; the third diode D3 may rectify the branch in which the third resistor R3 is located.

Specifically, when an input voltage is input from the second input end, the input voltage and a branch where the fourth pin of the relay K1 is located form a loop to generate an input current, the current is limited by the second resistor R2 and then charges the first capacitor C1 unidirectionally through the second diode D2, the current input by the first input end is limited by the second resistor R2 and then charges the first capacitor C1 to be full, and a certain time is required for the relay K1 to reach the rated working voltage immediately, so that the whole circuit can realize a buffer power supply function, the voltage on the first capacitor C1 is clamped at the rated amplitude value through the fourth diode D4, and the clamping effect of the fourth diode D4 can protect a coil inside the relay K1 from being burned out due to overhigh input voltage, so that the relay K1 can be kept stable when the circuit where the second resistor R2 is located is turned on.

When a signal of a first input end is input, the first triode Q1 is conducted, the second pin of the relay K1 is pulled to a low level, because the first capacitor C1 can provide a voltage for the relay K1 to normally work, after the relay K1 normally works, the first pin of the relay K1 and the branch where the third pin is located are conducted, at the moment, the input voltage and the branch where the third pin of the relay K1 is located form a loop to generate an input current, the input current is limited by the third resistor R3 and then is unidirectionally charged to the first capacitor C1 through the third diode D3, and similarly, the first capacitor C1 needs to be fully charged for a certain time, so that the whole circuit also has a buffering power supply function, the relay K1 can be kept stable when the circuit where the third resistor R3 is located is conducted, therefore, even if the input voltage fluctuation range is large and unstable, due to the clamping effect of the first capacitor C1 and the fourth diode D4, the relay K1 is not only after the circuit where the second resistor R2 is located is conducted or the circuit where the third resistor R3 is conducted Can be kept at a stable working point, and the stability of the whole circuit is improved.

In addition, the application also provides a fuel gas controller, which comprises at least one relay switching circuit in the embodiment. Because the input voltage of the gas controller is unstable in the using process, the gas controller with the relay switching power supply circuit in the embodiment can have better stability, and the safety risk in gas ignition can be reduced.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the term "long-pressing" is to be interpreted broadly, e.g., as long-pressing or continuous-pressing; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present specification, a description with reference to terms means that a specific structure or feature described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A relay switching power supply circuit is characterized by comprising a relay, a first resistor, a second resistor, a third resistor, a first capacitor, a first triode, a first diode, a second diode, a third diode, a fourth diode, a first input end, a second input end, a first output end and a second output end;

2. The relay-switched power supply circuit according to claim 1, wherein the first transistor is an NPN transistor or a PNP transistor.

3. The relay-switched power supply circuit of claim 2, wherein the first diode is a switching diode.

4. The relay-switched power supply circuit according to claim 1, wherein the fourth diode is a zener diode; the fourth diode is used for stabilizing the voltage at two ends of the first capacitor.

5. The relay-switched power supply circuit according to claim 1, wherein the first capacitor is an electrolytic capacitor; the first end is the anode of the electrolytic capacitor; the second end is the negative electrode of the electrolytic capacitor.

6. The relay-switched power supply circuit according to claim 1, wherein the second diode and the third diode are rectifier diodes; the second diode is used for rectifying a branch where the second resistor is located; and the third diode is used for rectifying the branch where the third resistor is located.

7. A gas controller comprising the relay-switched power supply circuit according to any one of claims 1 to 6.