A RV heater valve control system and method

Abstract

The present invention provides a RV heater valve control system and method, which relates to the field of valve control, wherein the system comprises: an input module (1), a control module (2) and an output module (3). The present invention can avoid potential safety hazards caused by the input source by controlling the external control signal of the input module (1); the switch is controlled by the control module (2) generating a magnetic field, thereby realizing the connection safety guarantee of the hardware circuit and greatly improving the system safety; by setting a specific detection point in the output module (3), during the system operation, the system operation failure caused by the circuit hardware failure can be avoided. The present invention can ensure the safe operation of the RV heating system, improve the safety of the system, and ensure the safety of users.

Description

Technical Field

[0001] The present invention relates to the field of valve control, and in particular to a valve control system and method for a motorhome heater. Background Art

[0002] The RV heater is an independent auxiliary heating system on the RV, which can be used after the engine is turned off, or it can provide auxiliary heating during driving. The RV heater uses combustible gas or fuel to control the entry of combustibles through the valve body during operation to achieve the purpose of combustion.

[0003] Due to the explosiveness and flammability of combustibles and the serious consequences of leakage, the control of the valve body is crucial to the safety of RV heaters. The existing valve body control basically only controls the valve body switch, and rarely considers safety; or circumvents it from the perspective of flame detection, and does not monitor the non-operating state, which poses a major safety hazard.

[0004] like Figure 1 The figure shows the control circuit of the existing RV heater valve. When the valve input control Vcontrol is normally high, the transistor Q1 is in the on state. At this time, P1 and P5 in K are connected. Due to the existence of magnetism, P2 and P4 are connected (P4 is connected to the valve entity). The valve output control Voutput has output, and the valve is in the open state. When the valve input control Vcontrol is normally low, the transistor Q1 is in the off state. At this time, there is no current in K, the valve output control Voutput has no output, and the valve is in the closed state. In this scheme, the control input is normally high or low, and the simple high and low level input control cannot avoid the safety hazards caused by input abnormalities from the input source; the valve output control does not generate feedback, which belongs to open-loop control. If there is a fault in this part of the circuit, the system cannot monitor the fault and perform corresponding control to cut off the system input, which poses a great safety hazard. Summary of the invention

[0005] The present invention provides a RV heater valve control system and method. The valve status is fully monitored from aspects such as valve control and operation process, and a safe operation mechanism of the RV heater valve is realized, which can ensure the safe operation of the RV heating system, improve the safety of the system, and protect the safety of users.

[0006] In a first aspect, the present invention provides a RV heater valve control system, comprising: the system comprises an input module (1), a control module (2) and an output module (3), the system is used to control the valve of the RV heater, the input module (1) is connected to the control module (2), wherein: the input module (1) is used to receive an external control signal and to supply power to the control module (2) based on the external control signal, wherein when the external control signal is a specific waveform, the input module (1) supplies power to the control module (2), and if it is not a specific waveform, the input module (1) stops supplying power to the control module (2); the control module (2) generates a magnetic field based on the power supply of the input module (1); and the output module (3) controls the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point.

[0007] Furthermore, the specific detection point comprises a first detection point and a second detection point, the output module (3) comprises an output branch and a detection branch, the first detection point is arranged in the detection branch, the second detection point is located at the output end of the output branch, and the output branch and the detection branch are selectively connected; the output module (3) is used for: when the voltage at the first detection point is within a first preset range and the voltage at the second detection point is within a second preset range, turning on the switch in the valve control branch based on the generated magnetic field, otherwise turning off the switch.

[0008] Furthermore, the output module (3) comprises a first switch and a second switch, each switch having two connection states; when the first switch is in a first connection state, the first switch is connected to a driving power supply and a first detection point, and when the second switch is in the first connection state, the second switch is suspended; when the first switch is in a second connection state, the first switch is connected to a driving power supply and a driving circuit, and when the second switch is in a second connection state, the second switch connects the first switch to a second detection point.

[0009] Furthermore, the input module (1) comprises a resistor R1, a resistor R2, a transistor Q1 and a diode D1; wherein the first port of the transistor Q1 is connected to the resistor R2, the second port of the transistor Q1 is connected to the diode D1, the diode D1 is connected in series with the resistor R1, and the third port of the transistor Q1 is grounded; the input module (1) is used to: when the received external control signal is a specific waveform, control the transistor Q1 to alternate between on and off, thereby generating an alternating current with a specific waveform and supplying power to the control module (2), wherein the specific waveform is a PWM wave; when the received external control signal is not a specific waveform, the input module (1) does not supply power to the control module (2).

[0010] Furthermore, the control module (2) comprises a capacitor C1, a diode D2 and an inductive component; wherein one end of the capacitor C1 is connected to the input module (1), the diode D2 and the inductive component form a parallel structure, the other end of the capacitor C1 is connected to the parallel structure, and the other end of the parallel structure is grounded; the control module (2) is used to: when the input module (1) outputs alternating current, generate a magnetic field across the capacitor C1 to cause the inductive component to generate a magnetic field; otherwise, no magnetic field is generated.

[0011] Furthermore, the output module (3) comprises a resistor R3, a resistor R4 and an external pin module K; wherein one end of the resistor R4 is grounded and the other end is connected to the resistor R3, one end of the resistor R3 is connected to the external pin module K, and the external pin module K is connected to the valve; and the first detection point is set at the non-grounded end of the resistor R4 in the output module (3); and the second detection point is set at the output end of the output module (3).

[0012] In a second aspect, the present invention further provides a method for controlling the valve of a motorhome heater, wherein the valve of the motorhome heater is controlled by an input module (1), a control module (2) and an output module (3), wherein the input module (1) is connected to the control module (2); the control method comprises: detecting whether the external control signal received by the input module (1) is a specific waveform; if it is a specific waveform, the input module (1) supplies power to the control module (2), and the energized control module (2) generates a magnetic field; if it is not a specific waveform, the input module (1) stops supplying power to the control module (2); and using the output module (3) to control the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point.

[0013] In a third aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any of the above-described RV heater valve control methods are implemented.

[0014] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-described methods for controlling a RV heater valve.

[0015] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods for controlling a RV heater valve.

[0016] The present invention provides a control system and method for a motorhome heater valve. By controlling an external control signal of an input module (1), potential safety hazards caused by an input source can be avoided. By controlling a switch in a manner of a magnetic field generated by a control module (2), the connection safety of a hardware circuit is ensured, and the system safety is greatly improved. By setting a specific detection point in an output module (3), system operation failures caused by circuit hardware failures can be avoided during system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a circuit design schematic diagram of an application scenario of the RV heater valve control of the prior art;

[0019] Figure 2 Schematic diagrams of some circuit structures of a RV heater valve control system provided according to the present invention;

[0020] Figure 3 is a flow chart of a method for controlling a RV heater valve according to the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of an electronic device provided according to the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] It should be noted that VCC is the input voltage, R is the resistor, C is the capacitor, D is the diode, Q is the transistor, GND is the ground, K is the external pin module (which can be implemented by a customized relay or a combination of discrete components), P1-P8 are the pins of the external pin module K, Vcontrol is the valve input control, Vdetection is the valve operation detection, and Voutput is the valve output control.

[0029] See also Figure 2 , Figure 2 The present invention provides a circuit diagram of a RV heater valve control system, which comprises: an input module (1), a control module (2) and an output module (3). The system is used to control the valve of the RV heater. The input module (1) is connected to the control module (2), wherein:

[0030] The input module (1) is used to receive an external control signal and to supply power to the control module (2) based on the external control signal, wherein when the external control signal is of a specific waveform, the input module (1) supplies power to the control module (2); if it is not of the specific waveform, the input module (1) stops supplying power to the control module (2);

[0031] The control module (2) generates a magnetic field based on the power supply condition of the input module (1);

[0032] The output module (3) controls the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point.

[0033] In some embodiments, the input module (1) comprises a resistor R1, a resistor R2, a transistor Q1 and a diode D1; wherein the first port of the transistor Q1 is connected to the resistor R2, the second port of the transistor Q1 is connected to the diode D1, the diode D1 is connected in series with the resistor R1, and the third port of the transistor Q1 is grounded; the input module (1) is used to: when the received external control signal is a specific waveform, control the transistor Q1 to alternate between on and off, thereby generating an alternating current with a specific waveform and supplying power to the control module (2), wherein the specific waveform is a PWM wave; when the received external control signal is not a specific waveform, the input module (1) does not supply power to the control module (2).

[0034] As an example, Figure 2 The dashed box ① is the input module (1), the dashed box ② is the control module (2), and the dashed box ③ is the output module (3). The input module (1) can charge the capacitor C1 in the control module (2). When the external control signal Vcontrol is normally high, the transistor Q1 in the input module (1) is in the on state. At this time, the voltage across the capacitor C1 is low, and the control module (2) cannot be powered; when the external control signal Vcontrol is normally low, the transistor Q1 is in the off state. Due to the characteristics of the capacitor C1 blocking DC and passing AC, the control module (2) cannot be powered. Therefore, in order to ensure the reliability of control, the input of the external control signal Vcontrol needs to be a specific waveform (such as a PWM waveform with a fixed duty cycle, for example, a duty cycle of 1:1), so that the transistor Q1 can be continuously turned on and off, so that the output end obtains a series of pulses with equal amplitudes but unequal widths, which are equivalent to the AC input capacitor C1 (that is, equivalent to inputting AC power into the capacitor C1), thereby realizing the continuous charging and discharging of the capacitor C1, and providing support for the subsequent circuit. According to the actual conduction frequency requirements, the transistor Q1 can also be replaced with a MOS tube at low frequency. By replacing the traditional normally high or normally low input method with a specific waveform of the input module (1), the safety hazards caused by functional abnormalities that may be caused by program control or system input abnormalities can be avoided from the input source.

[0035] In some embodiments, the control module (2) comprises a capacitor C1, a diode D2 and an inductive component; wherein one end of the capacitor C1 is connected to the input module (1), the diode D2 and the inductive component form a parallel structure, the other end of the capacitor C1 is connected to the parallel structure, and the other end of the parallel structure is grounded; the control module (2) is used to: when the input module (1) outputs alternating current, generate a magnetic field across the capacitor C1 so that the inductive component generates a magnetic field; otherwise, no magnetic field is generated.

[0036] As an example, Figure 2The dotted box ② in the middle is the control module (2). The inductive component (or electromagnetic induction component) is between the pin P1 and the pin P5 of the external pin module K. The control module (2) receives the alternating current input by the input module (1). The magnetic field generated can realize the existence of a continuously changing current between the pins P1 and P5 of the external pin module K, so that the inductive component between P1 and P5 can generate a magnetic field. The generated magnetic field attracts the switch connected to the pins P2 and P6 (for example, an inductive iron core can be set at the position between P3, P4, P7, and P8, so that it generates an induced magnetic field under the action of the magnetic field, and then the switch can be attracted in any direction of the magnetic field. When there is a magnetic field, the pins P2 and P6 are attracted to the middle position, so that the left side P2 is connected to P4 and the right side P6 is connected to P8. When there is no magnetic field, they are in Figure 2 In the current position, P2 on the left is connected to P3, and P6 on the right is connected to P7), realizing the path switching in the dotted box ③, providing support for system safety monitoring and output. D2 is a freewheeling diode to prevent overvoltage from occurring and causing safety hazards.

[0037] In some embodiments, the output module (3) includes a resistor R3, a resistor R4 and an external pin module K; wherein one end of the resistor R4 is grounded and the other end is connected to the resistor R3, one end of the resistor R3 is connected to the external pin module K, and the external pin module K is connected to the valve; and the first detection point is set at the non-grounded end of the resistor R4 in the output module (3); and the second detection point is set at the output end of the output module (3).

[0038] In some embodiments, the specific detection point includes a first detection point and a second detection point, and the voltage at the first detection point Vdetection is the voltage of the non-grounded end of the resistor R4 in the output module (3). The voltage at the second detection point Voutput is the output voltage of the output module (3). When the voltage at the first detection point is within the first preset range and the voltage at the second detection point is within the second preset range (for example, the voltage at the first detection point is 0V, the first preset range is equal to 0V, then the voltage at the first detection point is within the first preset range, the voltage at the second detection point is 15V, the second preset range is greater than or equal to 0V, then the voltage at the second detection point is within the second preset range), the switch in the valve control branch is turned on based on the generated magnetic field, otherwise the switch is turned off. The second detection point can be P8, which can detect whether P8 has a voltage output or whether the output voltage is within the second preset range. The first and second preset ranges can be determined according to actual conditions.

[0039] In some embodiments, the output module (3) includes a first switch and a second switch, the first switch is a switch connected to P2, the second switch is a switch connected to P6, and each switch has two connection states;

[0040] When the first switch is in the first connected state, the first switch is connected to the driving power supply and the first detection point, and when the second switch is in the first connected state, the second switch is suspended.

[0041] As an example, refer to Figure 2 When the first and second switches are in the first connected state, the first switch connects P2 and P3, so that the driving power supply VCC, the first detection point Vdetection, the resistors R3 and R4 are connected, and the voltage output by the driving power supply VCC is grounded; the second switch connects P6 and P7, so that P4, P6, and P7 are connected, among which P7 is suspended, and P8 connected to the valve has no signal output (that is, the second detection point Voutput has no signal output), and the valve is closed.

[0042] When the first switch is in the second connected state, the first switch connects the driving power supply and the driving circuit, and when the second switch is in the second connected state, the second switch connects the first switch to the second detection point.

[0043] As an example, refer to Figure 2 When the first and second switches are in the second connected state, the first switch connects P2 and P4, and the second switch connects P6 and P8, so that the driving power supply VCC, P2, P4, P6, and P8 are connected to form a driving circuit. The voltage generated by the driving power supply VCC is output from P8, and P8 connected to the valve has a signal (that is, the second detection point Voutput has a signal output), and the valve is opened.

[0044] In addition, the first / second switch may also have the following connection conditions: Figure 2 For example:

[0045] When the first switch is in the first connected state and the second switch is in the second connected state, the first switch connects P2 and P3, so that the driving power supply VCC, the first detection point Vdetection, the resistors R3 and R4 are connected, and the voltage output by the driving power supply VCC is grounded; the second switch connects P6 and P8, so that P4, P6, and P8 are connected to form a loop, but there is no driving power supply, and P8 connected to the valve has no signal output (that is, the second detection point Voutput has no signal output), and the valve is closed.

[0046] When the first switch is in the second connected state and the second switch is in the first connected state, the first switch connects P2 and P4, and the second switch connects P6 and P7, so that the driving power supply VCC, P2, P4, P6, and P7 are connected, the voltage of the driving power supply VCC is output from P7, and P8 has no signal output (that is, the second detection point Voutput has no signal output), and the valve is closed. Among them, P7 can be connected to other functional modules according to actual conditions, such as an alarm module.

[0047] As an example, Figure 2 In the output module (3) of the valve in the dotted box ③, when the input control Vcontrol does not input a specific waveform (for example, the input is always high or always low), P2 and P3 of the external pin module K are connected, the output of the first detection point Vdetection is a high level, which is not within the first preset range (for example, the first preset range is equal to 0), P4, P6 and P7 are connected, P8 is suspended, the voltage output of the second detection point Voutput is 0, which is not within the second preset range (for example, the second preset range is greater than 0), and the valve is in a closed state; when the input control Vcontrol inputs a specific waveform (that is, in a normal working state), there is a continuously changing current between P1 and P5 of the external pin module K, the inductive component between P1 and P5 can generate magnetism, P2 and P4 of the external pin module K are connected, P3 is suspended, the output of the first detection point Vdetection is a low level (for example, 0V is detected), within the first preset range, P4, P6 and P8 are connected, P7 is suspended, the second detection point Voutput has an output, the output level is within the second preset range, and the valve is in an open state.

[0048] The high and low levels in the above examples can be set to numerical values ​​or numerical ranges according to actual conditions.

[0049] As an implementation of the systems shown in the above figures, the present invention also provides some embodiments of a method for controlling a valve of a motorhome heater. Figure 2 The embodiments of some methods shown correspond to each other, and the method can be applied to various electronic devices.

[0050] Some embodiments of a RV heater valve control method include: controlling the RV heater valve through an input module (1), a control module (2) and an output module (3), wherein the input module (1) is connected to the control module (2);

[0051] The control method comprises:

[0052] It is detected whether the external control signal received by the input module (1) is of a specific waveform; if it is of a specific waveform, the input module (1) supplies power to the control module (2), and the powered control module (2) generates a magnetic field; if it is not of a specific waveform, the input module (1) stops supplying power to the control module (2); and the output module (3) is used to control the switch in the valve control branch to open or close based on the magnetic field and the voltage at the specific detection point.

[0053] Furthermore, the specific detection point comprises a first detection point and a second detection point, the output module (3) comprises an output branch and a detection branch, the first detection point is arranged in the detection branch, the second detection point is located at the output end of the output branch, and the output branch and the detection branch are selectively connected; when the voltage at the first detection point is within a first preset range and the voltage at the second detection point is within a second preset range, the switch in the valve control branch is turned on based on the generated magnetic field, otherwise the switch is turned off.

[0054] Furthermore, the output module (3) comprises a first switch and a second switch, each switch having two connection states; when the first switch is in a first connection state, the first switch is connected to a driving power supply and a first detection point, and when the second switch is in the first connection state, the second switch is suspended; when the first switch is in a second connection state, the first switch is connected to a driving power supply and a driving circuit, and when the second switch is in a second connection state, the second switch connects the first switch to a second detection point.

[0055] Furthermore, the output module (3) comprises a resistor R3, a resistor R4 and an external pin module K; wherein one end of the resistor R4 is grounded and the other end is connected to the resistor R3, one end of the resistor R3 is connected to the external pin module K, and the external pin module K is connected to the valve; and the first detection point is set at the non-grounded end of the resistor R4 in the output module (3); and the second detection point is set at the output end of the output module (3).

[0056] The external pin module K includes a first switch and a second switch. Figure 2 As shown, P1-P8 are pins of the external pin module K, P2 is connected to the first switch, and P6 is connected to the second switch.

[0057] The reference process of the above control method can be found in Figure 3 If a specific waveform is input, the input module (1) supplies power to the control module (2), so that the control module (2) generates a magnetic field to control the switch of the output module (3), and the switch of the output module (3) is turned on; the voltage at the first detection point is detected, and if it is not within a first preset range, the gate valve is closed; if it is within the first preset range, the voltage at the second detection point is detected, and if it is not within a second preset range, the gate valve is closed; if it is within the second preset range, the valve is opened, and the circuits of the input module (1), the control module (2), and the output module (3) are normal.

[0058] It is understandable that the contents recorded in this system are similar to those in reference Figure 2 Therefore, the operations, features and beneficial effects described above for the system are also applicable to the method, and will not be described in detail here.

[0059] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the RV heater valve control method, the method comprising: detecting whether the external control signal received by the input module (1) is a specific waveform; if it is a specific waveform, the input module (1) supplies power to the control module (2), and the powered control module (2) generates a magnetic field; if it is not a specific waveform, the input module (1) stops supplying power to the control module (2); and using the output module (3) to control the switch in the valve control branch to open or close based on the magnetic field and the voltage at the specific detection point.

[0060] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the above-mentioned methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0061] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, and when the program instructions are executed by a computer, the computer can execute the RV heater valve control method provided by the above methods, the method comprising: detecting whether the external control signal received by the input module (1) is a specific waveform, if it is a specific waveform, the input module (1) supplies power to the control module (2), and the powered control module (2) generates a magnetic field; if it is not a specific waveform, the input module (1) stops supplying power to the control module (2); and using the output module (3) to control the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point.

[0062] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for controlling the valve of a motorhome heater provided above is implemented. The method comprises: detecting whether the external control signal received by the input module (1) is a specific waveform. If it is a specific waveform, the input module (1) supplies power to the control module (2), and the powered control module (2) generates a magnetic field; if it is not a specific waveform, the input module (1) stops supplying power to the control module (2); and using the output module (3) to control the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point.

[0063] The device embodiments described above are merely illustrative, wherein the units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0064] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the above methods of each embodiment or some parts of the embodiments.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A RV heater valve control system, characterized in that: The system comprises an input module (1), a control module (2) and an output module (3), and the system is used to control the valve of a motorhome heater, the input module (1) being connected to the control module (2), wherein: The input module (1) is used to receive an external control signal and supply power to the control module (2) based on the external control signal, wherein when the external control signal is of a specific waveform, the input module (1) supplies power to the control module (2); if it is not of the specific waveform, the input module (1) stops supplying power to the control module (2); The control module (2) generates a magnetic field based on the power supply condition of the input module (1); The output module (3) controls the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point; The specific detection point comprises a first detection point and a second detection point, the output module (3) comprises an output branch and a detection branch, the first detection point is arranged in the detection branch, the second detection point is located at the output end of the output branch, and the output branch and the detection branch are selectively connected; The output module (3) is used to: when the voltage at the first detection point is within a first preset range and the voltage at the second detection point is within a second preset range, based on the generated magnetic field, turn on the switch in the valve control branch; otherwise, turn off the switch; The output module (3) comprises a first switch and a second switch, each switch having two connection states; When the first switch is in a first connected state, the first switch is connected to the driving power supply and the first detection point, and when the second switch is in the first connected state, the second switch is suspended; When the first switch is in the second connected state, the first switch connects the driving power supply and the driving circuit, and when the second switch is in the second connected state, the second switch connects the first switch to the second detection point; The input module (1) comprises a resistor R1, a resistor R2, a transistor Q1 and a diode D1; wherein the first port of the transistor Q1 is connected to the resistor R2, the second port of the transistor Q1 is connected to the diode D1, the diode D1 is connected in series with the resistor R1, and the third port of the transistor Q1 is grounded; The input module (1) is used to: when the received external control signal is of a specific waveform, control the transistor Q1 to alternate between on and off, thereby generating alternating current of a specific waveform and supplying power to the control module (2), wherein the specific waveform is a PWM wave; when the received external control signal is not of a specific waveform, the input module (1) does not supply power to the control module (2).

2. The RV heater valve control system according to claim 1, characterized in that: The control module (2) comprises a capacitor C1, a diode D2 and inductive components; One end of the capacitor C1 is connected to the input module (1), the diode D2 and the inductive component form a parallel structure, the other end of the capacitor C1 is connected to the parallel structure, and the other end of the parallel structure is grounded; The control module (2) is used for: When the input module (1) outputs alternating current, a magnetic field is generated by the inductive component across the capacitor C1; otherwise, no magnetic field is generated.

3. The RV heater valve control system according to claim 2, characterized in that: The output module (3) comprises a resistor R3, a resistor R4 and an external pin module K; One end of the resistor R4 is grounded, and the other end is connected to the resistor R3, one end of the resistor R3 is connected to the external pin module K, and the external pin module K is connected to the valve; and, The first detection point is arranged at the non-grounded end of the resistor R4 in the output module (3); The second detection point is arranged at the output end of the output module (3).

4. A method for controlling a motorhome heater valve, characterized in that: The valve of the RV heater is controlled by an input module (1), a control module (2) and an output module (3), wherein the input module (1) is connected to the control module (2); The control method comprises: Detecting whether the external control signal received by the input module (1) is of a specific waveform; if it is of a specific waveform, the input module (1) supplies power to the control module (2), and the powered control module (2) generates a magnetic field; if it is not of a specific waveform, the input module (1) stops supplying power to the control module (2); the specific waveform is a PWM wave; Using the output module (3) to control the switch in the valve control branch to open or close based on the magnetic field and the voltage at a specific detection point; The specific detection point comprises a first detection point and a second detection point, the output module (3) comprises an output branch and a detection branch, the first detection point is arranged in the detection branch, the second detection point is located at the output end of the output branch, and the output branch and the detection branch are selectively connected; When the voltage at the first detection point is within a first preset range and the voltage at the second detection point is within a second preset range, the switch in the valve control branch is turned on based on the generated magnetic field, otherwise the switch is turned off; The output module (3) comprises a first switch and a second switch, each switch having two connection states; When the first switch is in a first connected state, the first switch is connected to the driving power supply and the first detection point, and when the second switch is in the first connected state, the second switch is suspended; When the first switch is in the second connected state, the first switch connects the driving power supply and the driving circuit, and when the second switch is in the second connected state, the second switch connects the first switch to the second detection point.

5. The RV heater valve control method according to claim 4, characterized in that: The output module (3) comprises a resistor R3, a resistor R4 and an external pin module K; One end of the resistor R4 is grounded, and the other end is connected to the resistor R3, one end of the resistor R3 is connected to the external pin module K, and the external pin module K is connected to the valve; and, The first detection point is arranged at the non-grounded end of the resistor R4 in the output module (3); The second detection point is arranged at the output end of the output module (3).

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