Pressure switch display circuit

Abstract

This utility model discloses a pressure switch display circuit, including an AC connection circuit, a first display circuit, and a second display circuit. The AC connection circuit includes an AC terminal ACC1, an AC terminal ACC2, and a connection switch P1. The AC terminal ACC1 is electrically connected to one end of a resistor R5 and a resistor R6, and the AC terminal ACC2 is electrically connected to the common terminal of the connection switch P1. This pressure switch display circuit, through the linkage of the AC connection circuit, the first display circuit, and the second display circuit, provides a direct display of the two states of the pressure switch. It has advantages such as simple structure, low cost, stable performance, and accurate pressure status display.

Description

Technical Field

[0001] This utility model belongs to the field of pressure switch display technology, and specifically relates to a pressure switch display circuit. Background Technology

[0002] Pressure switches are widely used devices in industrial control, smart homes, automobiles, and other fields to detect system pressure and trigger corresponding actions when the pressure reaches a set value. Currently, most pressure switches only have pressure control functions and lack intuitive and effective display circuits to present the pressure status and operating conditions. Some pressure switches with display functions suffer from complex structures, high costs, and poor stability, making them difficult to meet practical application requirements.

[0003] Therefore, further improvements will be made to address the aforementioned issues. Utility Model Content

[0004] The main purpose of this utility model is to provide a pressure switch display circuit, which links an AC connection circuit, a first display circuit, and a second display circuit to intuitively display the two states of the pressure switch. It has the advantages of simple structure, low cost, stable performance, and accurate display of pressure status.

[0005] To achieve the above objectives, this utility model provides a pressure switch display circuit, including an AC connection circuit, a first display circuit, and a second display circuit, wherein:

[0006] The AC connection circuit includes AC terminal ACC1, AC terminal ACC2 and connection switch P1. AC terminal ACC1 is electrically connected to one end of resistor R5 and resistor R6. AC terminal ACC2 is electrically connected to the common terminal (P terminal) of connection switch P1.

[0007] The first display circuit includes a rectifier bridge DB1, a step-down chip U1, and a light-emitting diode LED1. Pin 3 of the rectifier bridge DB1 is electrically connected to the other end of the resistor R6, and pin 4 of the rectifier bridge DB1 is electrically connected to the first end (pin 1) of the connection switch P1. Pin 1 of the rectifier bridge DB1 is electrically connected to pin 1 of the step-down chip U1. A diode D1, a light-emitting diode LED1, and a resistor R1 are sequentially connected between pin 2 of the step-down chip U1 and pin 2 of the rectifier bridge DB1. A capacitor C1 is connected between pin 2 and pin 3 of the step-down chip U1, and a diode D3 is connected between pin 3 of the step-down chip U1 and pin 2 of the rectifier bridge DB1. The common terminal of the capacitor C1 and the diode D3 is electrically connected to the anode of the diode D1 and one end of the capacitor C3 through an inductor L1, respectively. The other end of the capacitor C3 is electrically connected to pin 2 of the rectifier bridge DB1.

[0008] The second display circuit includes a rectifier bridge DB2, a step-down chip U2, and a light-emitting diode LED2. Pin 4 of the rectifier bridge DB2 is electrically connected to the other end of the resistor R6, and pin 3 of the rectifier bridge DB2 is electrically connected to the second end (pin 3) of the connection switch P1. Pin 1 of the rectifier bridge DB2 is electrically connected to pin 1 of the step-down chip U2. A diode D4, a resistor R4, and a light-emitting diode LED2 are sequentially connected between pin 2 of the step-down chip U2 and pin 2 of the rectifier bridge DB2. A capacitor C2 is connected between pin 2 and pin 3 of the step-down chip U2, and a diode D2 is connected between pin 3 of the step-down chip U2 and pin 2 of the rectifier bridge DB2. The common terminal of the capacitor C2 and the diode D2 is electrically connected to the anode of the diode D4 and one end of the capacitor C4 through an inductor L2, respectively. The other end of the capacitor C4 is electrically connected to pin 2 of the rectifier bridge DB2.

[0009] As a further preferred embodiment of the above technical solution, a capacitor C5 is connected between pin 1 and pin 2 of the rectifier bridge DB1.

[0010] As a further preferred embodiment of the above technical solution, a capacitor C6 is connected between pin 1 and pin 2 of the rectifier bridge DB2.

[0011] As a further preferred embodiment of the above technical solution, a resistor R3 is connected in parallel across the two ends of the capacitor C3.

[0012] As a further preferred embodiment of the above technical solution, a resistor R2 is connected in parallel across the two ends of the capacitor C4. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0014] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0015] This utility model discloses a pressure switch display circuit. The specific embodiments of the utility model are further described below with reference to preferred embodiments.

[0016] In the embodiments of this utility model, those skilled in the art will note that the pressure switches and the like involved in this utility model can be considered as prior art.

[0017] Preferred embodiment.

[0018] like Figure 1 As shown, this utility model discloses a pressure switch display circuit, including an AC connection circuit, a first display circuit, and a second display circuit, wherein:

[0019] The AC connection circuit includes AC terminal ACC1, AC terminal ACC2 and connection switch P1. AC terminal ACC1 is electrically connected to one end of resistor R5 and resistor R6. AC terminal ACC2 is electrically connected to the common terminal (P terminal) of connection switch P1.

[0020] The first display circuit includes a rectifier bridge DB1, a step-down chip U1, and a light-emitting diode LED1. Pin 3 of the rectifier bridge DB1 is electrically connected to the other end of the resistor R6, and pin 4 of the rectifier bridge DB1 is electrically connected to the first end (pin 1) of the connection switch P1. Pin 1 of the rectifier bridge DB1 is electrically connected to pin 1 of the step-down chip U1. A diode D1, a light-emitting diode LED1, and a resistor R1 are sequentially connected between pin 2 of the step-down chip U1 and pin 2 of the rectifier bridge DB1. A capacitor C1 is connected between pin 2 and pin 3 of the step-down chip U1, and a diode D3 is connected between pin 3 of the step-down chip U1 and pin 2 of the rectifier bridge DB1. The common terminal of the capacitor C1 and the diode D3 is electrically connected to the anode of the diode D1 and one end of the capacitor C3 through an inductor L1, respectively. The other end of the capacitor C3 is electrically connected to pin 2 of the rectifier bridge DB1.

[0021] The second display circuit includes a rectifier bridge DB2, a step-down chip U2, and a light-emitting diode LED2. Pin 4 of the rectifier bridge DB2 is electrically connected to the other end of the resistor R6, and pin 3 of the rectifier bridge DB2 is electrically connected to the second end (pin 3) of the connection switch P1. Pin 1 of the rectifier bridge DB2 is electrically connected to pin 1 of the step-down chip U2. A diode D4, a resistor R4, and a light-emitting diode LED2 are sequentially connected between pin 2 of the step-down chip U2 and pin 2 of the rectifier bridge DB2. A capacitor C2 is connected between pin 2 and pin 3 of the step-down chip U2, and a diode D2 is connected between pin 3 of the step-down chip U2 and pin 2 of the rectifier bridge DB2. The common terminal of the capacitor C2 and the diode D2 is electrically connected to the anode of the diode D4 and one end of the capacitor C4 through an inductor L2, respectively. The other end of the capacitor C4 is electrically connected to pin 2 of the rectifier bridge DB2.

[0022] Specifically, a capacitor C5 is connected between pin 1 and pin 2 of the rectifier bridge DB1.

[0023] More specifically, a capacitor C6 is connected between pin 1 and pin 2 of the rectifier bridge DB2.

[0024] Furthermore, a resistor R3 is connected in parallel across the two ends of the capacitor C3.

[0025] Furthermore, a resistor R2 is connected in parallel across the two ends of the capacitor C4.

[0026] Regarding this utility model:

[0027] AC terminals ACC1 and ACC2 are connected to AC power. When the pressure does not reach the set value, the P terminal of the connection switch P1 is connected to pin 1, thereby turning on the first display circuit and lighting up LED1, which displays a blue light.

[0028] When the pressure reaches the set value, the P terminal and pin 3 of the connecting switch P1 are connected, thereby turning on the second display circuit, and the light-emitting diode LED2 lights up, indicating a red light.

[0029] Taking the first display circuit as an example, the AC-DC LED driver circuit based on the SM6035A-3 chip mainly functions to convert AC power into DC power suitable for LED (LED1) to work, thereby achieving constant current drive for the LED.

[0030] The DB1 is a rectifier bridge that converts input AC power into DC power. The AC power supply is connected to the AC pins (pins 3 and 4) of the MB10S, and after rectification, DC voltage is output from D+ (pin 1) and D- (pin 2).

[0031] Capacitor C1 provides stable power filtering for the VDD pin of chip U1, ensuring the stability of chip operation.

[0032] D1 (FR107WS) and D3 (FR107WS): These two diodes serve as rectification and freewheeling diodes. D1 is used to rectify the output voltage, while D3 acts as a freewheeling diode in the circuit to prevent the reverse electromotive force generated by inductor L1 from damaging the circuit.

[0033] L1 (1.5mH): Inductor, together with D1, D3 and C3, forms a simple Buck-Boost circuit structure (approximately a Buck circuit here). Through the energy storage and release characteristics of the inductor, the output current is regulated and stabilized.

[0034] C3 (100uF / 10V): Performs secondary filtering on the output voltage to further smooth the voltage and provide a stable DC power supply for LED1.

[0035] LED1 (LED-DIP3-1): Light-emitting diode, which is the load of the circuit and enables constant current drive for light emission.

[0036] R1 (50Ω±1%) and R3 (1.5KΩ±1%): R1 is a current sampling resistor. By detecting the voltage drop across it, the voltage is fed back to chip U1 to adjust the output current, ensuring that LED1 operates at a suitable current. R3 can be used to adjust the circuit's operating point or as an auxiliary function such as a voltage divider resistor.

[0037] It is worth mentioning that the technical features such as pressure switches involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0038] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pressure switch display circuit, characterized in that, It includes an AC connection circuit, a first display circuit, and a second display circuit, wherein: The AC connection circuit includes AC terminal ACC1, AC terminal ACC2 and connection switch P1. AC terminal ACC1 is electrically connected to one end of resistor R5 and resistor R6. AC terminal ACC2 is electrically connected to the common terminal of connection switch P1. The first display circuit includes a rectifier bridge DB1, a step-down chip U1, and a light-emitting diode LED1. Pin 3 of the rectifier bridge DB1 is electrically connected to the other end of the resistor R6, and pin 4 of the rectifier bridge DB1 is electrically connected to the first end of the connection switch P1. Pin 1 of the rectifier bridge DB1 is electrically connected to pin 1 of the step-down chip U1. A diode D1, a light-emitting diode LED1, and a resistor R1 are sequentially connected between pin 2 of the step-down chip U1 and pin 2 of the rectifier bridge DB1. A capacitor C1 is connected between pins 2 and 3 of the step-down chip U1, and a diode D3 is connected between pin 3 of the step-down chip U1 and pin 2 of the rectifier bridge DB1. The common terminal of the capacitor C1 and the diode D3 is electrically connected to the anode of the diode D1 and one end of the capacitor C3 through an inductor L1, respectively. The other end of the capacitor C3 is electrically connected to pin 2 of the rectifier bridge DB1. The second display circuit includes a rectifier bridge DB2, a step-down chip U2, and a light-emitting diode LED2. Pin 4 of the rectifier bridge DB2 is electrically connected to the other end of the resistor R6, and pin 3 of the rectifier bridge DB2 is electrically connected to the second end of the connection switch P1. Pin 1 of the rectifier bridge DB2 is electrically connected to pin 1 of the step-down chip U2. A diode D4, a resistor R4, and a light-emitting diode LED2 are sequentially connected between pin 2 of the step-down chip U2 and pin 2 of the rectifier bridge DB2. A capacitor C2 is connected between pins 2 and 3 of the step-down chip U2, and a diode D2 is connected between pin 3 of the step-down chip U2 and pin 2 of the rectifier bridge DB2. The common terminal of the capacitor C2 and the diode D2 is electrically connected to the anode of the diode D4 and one end of the capacitor C4 through an inductor L2, respectively. The other end of the capacitor C4 is electrically connected to pin 2 of the rectifier bridge DB2.

2. The pressure switch display circuit according to claim 1, characterized in that, A capacitor C5 is connected between pin 1 and pin 2 of the rectifier bridge DB1.

3. The pressure switch display circuit according to claim 2, characterized in that, A capacitor C6 is connected between pin 1 and pin 2 of the rectifier bridge DB2.

4. A pressure switch display circuit according to claim 3, characterized in that, A resistor R3 is connected in parallel across the two ends of the capacitor C3.

5. A pressure switch display circuit according to claim 4, characterized in that, A resistor R2 is connected in parallel across the two ends of the capacitor C4.

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