Electromagnetic valve detection circuit

Abstract

The utility model discloses a solenoid valve detection circuit, including master control module, solenoid valve port, drive module and sampling module, the master control module is equipped with control terminal and detection terminal, each control terminal of the master control module is connected with each drive module in one-to-one correspondence, and each detection terminal is connected with each drive module in one-to-one correspondence. The driving modules are connected with ports of the electromagnetic valves in a one-to-one correspondence mode, the driving modules are connected with the sampling module, and the sampling module is connected with the detection end of the main control module. According to the technical scheme, the main control module controls the corresponding electromagnetic valves to be opened and closed through the driving modules, each electromagnetic valve port is connected to the detection end of the main control module through the corresponding driving module and the sampling module, and in other words, the system can achieve the detection function of each electromagnetic valve only through one input and output port; and input and output port resources of the main control module are greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit technical field more specifically, the utility model relates to a solenoid valve detection circuit. BACKGROUND

[0002] The existing gas water heater is provided with a solenoid valve, and the opening and closing of the solenoid valve is controlled to control the gas flow.

[0003] In the control circuit of the gas water heater, the solenoid valve driving circuit and the solenoid valve detection circuit are configured for the control of the solenoid valve. Generally, the water heater is provided with multiple solenoid valves to control the fire size. Therefore, the controller needs to use multiple input and output ports to detect the electrical parameters of each solenoid valve. As can be seen, in order to control multiple solenoid valves, multiple input and output port resources of the controller need to be occupied. SUMMARY

[0004] To solve the above technical problems, the purpose of the utility model is to provide a solenoid valve detection circuit.

[0005] The technical scheme adopted by the utility model to solve the problem is:

[0006] A solenoid valve detection circuit, comprising a main control module, a plurality of solenoid valve ports, a plurality of driving modules and a sampling module, the main control module is provided with a plurality of control ends and a detection end, the number of control ends of the main control module, the number of driving modules and the number of solenoid valve ports are consistent, each control end of the main control module is connected with each driving module one by one, each driving module is connected with each solenoid valve port one by one, each driving module is connected with the sampling module, and the sampling module is connected with the detection end of the main control module.

[0007] As a further improvement of the above technical scheme, the driving module comprises a switch tube M1, a resistor R1, a resistor R2 and a diode D1, the control end of the main control module is connected with the gate of the switch tube M1 through the resistor R1, the source of the switch tube M1 is connected with the sampling module, the drain of the switch tube M1 is connected with the negative electrode of the diode D1 and the solenoid valve port respectively, the positive electrode of the diode D1 is connected with the ground end, one end of the resistor R2 is connected with the gate of the switch tube M1, and the other end of the resistor R2 is connected with the source of the switch tube M1.

[0008] As a further improvement of the above technical solution, the sampling module comprises a resistor R3 and a resistor R4, one end of the resistor R3 is connected with the detection end of the main control module, the other end of the resistor R3 is connected with the ground end through the resistor R4, and the source of the switch tube M1 in each driving module is connected at the connection point of the resistor R3 and the resistor R4.

[0009] As a further improvement of the above technical solution, one of the driving modules is taken as a main driving module, the main driving module further comprises a resistor R5, a capacitor C1 and a diode D2, the control end of the main control module is connected with the gate of the switch tube M1 through the resistor R5, the capacitor C1 and the resistor R1 in sequence, the positive electrode of the diode D2 is connected with the ground end, and the negative electrode of the diode D2 is connected at the connection point of the capacitor C1 and the resistor R1.

[0010] The beneficial effect of the utility model is: in the technical scheme, the main control module controls the opening and closing of the corresponding electromagnetic valve through each driving module, and each electromagnetic valve port is connected to the detection end of the main control module through the corresponding driving module and the sampling module, that is, the system only needs to use one input and output port to realize the detection function of each electromagnetic valve, thereby greatly saving the input and output port resources of the main control module. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be explained further in combination with the description and specific embodiment of the drawings.

[0012] Figure 1 It is the circuit schematic diagram of the utility model. SPECIFIC EMBODIMENT

[0013] This part will describe the specific embodiment of the utility model in detail, and the preferred embodiment of the utility model is shown in the drawings, and the function of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0014] In the description of the utility model, it should be understood that the position description such as the position or location relationship indicated by up, down, front, back, left, right and the like is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific position, a specific position and operation, so it cannot be understood as the limitation of the utility model.

[0015] In the description of the utility model, if several mean one or more, multiple mean two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described to the first, the second is only used for distinguishing the technical features for the purpose, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0016] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0017] Referring to Figure 1 The utility model discloses a solenoid valve detection circuit, its first embodiment includes main control module, a plurality of solenoid valve ports, a plurality of drive modules and sampling module, the main control module is configured with a plurality of control end and a detection end, the number of control end of the main control module, the number of drive module and the number of solenoid valve port are consistent, each control end of the main control module is connected with each drive module one by one, each drive module is connected with each solenoid valve port one by one, each drive module is connected with sampling module, and sampling module is connected with the detection end of main control module.

[0018] Specifically, in the embodiment, the main control module controls the opening and closing of the corresponding solenoid valve through each drive module, and each solenoid valve port is connected to the detection end of the main control module through the corresponding drive module and the sampling module, that is, the embodiment only needs to use one input and output port to realize the detection function of each solenoid valve, thereby greatly saving the input and output port resources of the main control module.

[0019] Further, as a preferred embodiment, in the embodiment, the drive module includes a switch tube M1, a resistor R1, a resistor R2 and a diode D1, the control end of the main control module is connected with the gate of the switch tube M1 through the resistor R1, the source of the switch tube M1 is connected with the sampling module, the drain of the switch tube M1 is connected with the negative electrode of the diode D1 and the solenoid valve port respectively, the positive electrode of the diode D1 is connected with the ground end, one end of the resistor R2 is connected with the gate of the switch tube M1, and the other end of the resistor R2 is connected with the source of the switch tube M1.

[0020] As a further preferred embodiment, in this embodiment, the sampling module comprises a resistor R3 and a resistor R4, one end of the resistor R3 is connected with the detection end of the master control module, the other end of the resistor R3 is connected with the ground end through the resistor R4, and the source of the switch tube M1 in each driving module is connected at the connection point of the resistor R3 and the resistor R4.

[0021] As a further preferred embodiment, in this embodiment, one of the driving modules is taken as a master driving module, the master driving module further comprises a resistor R5, a capacitor C1 and a diode D2, the control end of the master control module is connected with the gate of the switch tube M1 through the resistor R5, the capacitor C1 and the resistor R1 in sequence, the positive electrode of the diode D2 is connected with the ground end, and the negative electrode of the diode D2 is connected at the connection point of the capacitor C1 and the resistor R1.

[0022] The above are only preferred embodiments of the present application, and do not limit the patent range of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields under the concept of the present application, using the content of the present application specification and drawings are included in the patent protection range of the present application.

Claims

1. An electromagnetic valve detection circuit, characterized by: Including a master control module, a plurality of electromagnetic valve ports, a plurality of drive modules and a sampling module, the master control module is configured with a plurality of control ends and a detection end, the number of control ends of the master control module, the number of drive modules and the number of electromagnetic valve ports are consistent, each control end of the master control module is connected with each drive module one by one, each drive module is connected with each electromagnetic valve port one by one, each drive module is connected with the sampling module, and the sampling module is connected with the detection end of the master control module.

2. The solenoid valve detection circuit according to claim 1, characterized in that: The drive module includes a switch tube M1, a resistor R1, a resistor R2 and a diode D1, the control end of the master control module is connected with the gate of the switch tube M1 through the resistor R1, the source of the switch tube M1 is connected with the sampling module, the drain of the switch tube M1 is connected with the negative electrode of the diode D1 and the electromagnetic valve port respectively, the positive electrode of the diode D1 is connected with the ground end, one end of the resistor R2 is connected with the gate of the switch tube M1, and the other end of the resistor R2 is connected with the source of the switch tube M1.

3. The solenoid valve test circuit of claim 2, wherein: The sampling module includes a resistor R3 and a resistor R4, one end of the resistor R3 is connected with the detection end of the master control module, the other end of the resistor R3 is connected with the ground end through the resistor R4, and the source of the switch tube M1 in each drive module is connected at the connection point of the resistor R3 and the resistor R4.

4. The solenoid valve test circuit of claim 2, wherein: One of the drive modules is taken as a main drive module, the main drive module further includes a resistor R5, a capacitor C1 and a diode D2, the control end of the master control module is connected with the gate of the switch tube M1 through the resistor R5, the capacitor C1 and the resistor R1 in turn, the positive electrode of the diode D2 is connected with the ground end, and the negative electrode of the diode D2 is connected at the connection point of the capacitor C1 and the resistor R1.

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