A gas control system and a control method thereof

Abstract

This application discloses a gas control system and its control method. The system includes a gas valve, an electronic controller, a thermopile, and an adjacent open flame burner and a main furnace burner. The gas valve has a first gas supply path for supplying gas to the open flame burner and a second gas supply path for supplying gas to the main furnace burner. The first gas supply path has a first valve port, and the second gas supply path has a first valve port and a second valve port. A first valve group of the gas valve is used to open and close the first valve port, and a second valve group is used to open and close the second valve port. The thermopile is located in the open flame burner to supply power to the electronic controller, the first valve group, and the second valve group after heating. The first valve group can remain in the open position when energized and can also be manually opened. The electronic controller includes a control module and an energy storage module. The energy storage module can supply power to the second valve group, and the control module is used to control the on / off state of the power supply circuit of the second valve group. The system and method have high safety.

Description

Technical Field

[0001] This application relates to the field of gas control technology, and in particular to a gas control system and its control method. Background Technology

[0002] In heating equipment such as gas water heaters or gas boilers, gas valves are used to control the flow of gas to regulate water temperature. The automatic control systems of these heating devices often use external power supplies, and ignition methods typically employ high-voltage pulse ignition or hot surface ignition. The equipment cannot operate in the event of a power outage. When using external power, environmental factors may cause leakage, electric shock, or other safety hazards during operation. Summary of the Invention

[0003] The purpose of this application is to provide a gas control system and its control method. The gas control system uses a combination of a constant open flame and a thermopile to achieve self-generation, and uses the weak current generated by the thermopile to supply the operation of the equipment, which is highly safe.

[0004] To solve the above-mentioned technical problems, this application provides a gas control system, including a gas valve, an electronic controller, a thermopile, a constant flame burner, and a main furnace burner; the constant flame burner is located beside the main furnace burner;

[0005] The gas valve has a first gas supply path and a second gas supply path. The first gas supply path is used to supply gas to the constant flame burner, and the second gas supply path is used to supply gas to the main furnace burner. The first gas supply path is provided with a first valve port, and the second gas supply path is provided with a first valve port and a second valve port.

[0006] The gas valve includes a first valve group and a second valve group, wherein the first valve group is used to open or close the first valve port, and the second valve group is used to open or close the second valve port.

[0007] The thermopile is located in the open flame burner, and the thermopile is used to supply power to the electronic controller, the first valve group and the second valve group;

[0008] The first valve assembly can remain in the open position when energized, and the first valve assembly can be manually opened.

[0009] The electronic controller includes a control module and an energy storage module. The energy storage module can supply power to the second valve group, and the control module is used to control the on / off state of the power supply circuit of the second valve group.

[0010] This gas control system utilizes a combination of a constant-flame burner and a thermoelectric stack to achieve self-generation. The first valve group is kept open by the electrical energy provided by the thermoelectric stack to supply gas to the constant-flame burner. The thermoelectric stack powers an electronic controller, which controls the on / off state of the power supply circuit for the second valve group, allowing it to open or close according to actual application needs. Simultaneously, an energy storage device is incorporated into the electronic controller to assist in opening the second valve group, ensuring its smooth opening even in low-voltage systems. This gas control system uses a constant-flame burner to heat the thermoelectric stack for power generation and ignites the main furnace burner, eliminating the need for an external power source and external control modules. Powering the system with low-voltage electricity from the thermoelectric stack ensures high safety, simplifies and facilitates maintenance, and reduces costs.

[0011] In one feasible embodiment, the electronic controller includes a converter, the thermopile is electrically connected to the control module via the converter, the converter includes a boost unit for boosting the electrical energy provided by the thermopile to the operating voltage of the control module; the control module is used to supply power to the energy storage module.

[0012] In one feasible solution, a first switch is connected in series on the power supply circuit of the first valve group, a second switch is connected in series on the energy storage module, a third switch is connected in series on the power supply circuit of the second valve group, and the control module is used to control the on / off state of the first switch, the second switch, and the third switch.

[0013] In one feasible solution, the gas control system further includes a temperature sensor for detecting the temperature of the medium heated by the main furnace burner; the control module is used to receive a set temperature zone command and to control the on / off state of the power supply circuit of the second valve group according to the set temperature zone command and the feedback signal of the temperature sensor.

[0014] In one feasible embodiment, the gas control system further includes an igniter, which is a piezoelectric ignition device used to ignite the conventional open flame burner.

[0015] In one feasible embodiment, the electronic controller is integrated onto the gas valve.

[0016] In one possible implementation, the gas control system further includes a control unit for manually opening the first valve group and for inputting a set temperature zone command to the control module.

[0017] In one possible implementation, the second valve assembly includes a pilot valve assembly and a differential pressure valve assembly, the thermopile and the energy storage module are used to power the pilot valve assembly, and the pilot valve assembly is used to control the differential pressure valve assembly to open or close the second valve port.

[0018] This application also provides a control method for a gas control system, wherein the gas control system is any of the gas control systems described above, and the control method includes:

[0019] The first valve group is manually opened, the constant flame burner is ignited, and the set temperature zone for the operation of the gas control system is set; the thermopile supplies power to the first valve group and the electronic controller under the heating effect of the constant flame burner.

[0020] The electronic controller identifies the current temperature of the heated medium. When it determines that the current temperature is lower than the set temperature zone, the control module controls the power supply circuit of the second valve group to be turned on, and the main furnace burner is ignited by the flame of the constant open flame burner. When the temperature of the heated medium reaches the set temperature zone, the control module controls the power supply circuit of the second valve group to be turned off.

[0021] This control method is consistent with the principle of the aforementioned control system and has the corresponding technical effects, so it will not be repeated here.

[0022] In one feasible solution, a shutdown command is input to the gas control system, and the control module cuts off the power supply circuit of the first valve group. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the gas control system in a non-operating state in one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the gas control system in operation in one embodiment of the present application;

[0025] Figure 3 for Figure 1 The diagram shows the electrical control principle of the gas control system.

[0026] Figure 4 This is a cross-sectional schematic diagram of the gas valve in a gas control system provided in one embodiment of this application;

[0027] Figure 5 for Figure 4 A magnified view of the location of the first valve group in the middle;

[0028] Figure 6 This is a flowchart illustrating the control method of the gas control system provided in one embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] Gas valve 10, electronic controller 20, thermopile 30, constant open flame burner 40, main furnace burner 50, igniter 60, temperature sensor 70, water tank 80, knob 90, capillary tube 100.

[0031] Valve body 11, air inlet channel 111, first valve chamber 112, second valve chamber 113, air outlet 1131, first valve port 114, second valve port 115, first flow channel 116, second flow channel 117, normally open throttling orifice 1171, third flow channel 118, guide hole 119.

[0032] First valve assembly 12, valve stem 121, first stem portion 1211, second stem portion 1212, valve seal 122, first magnetic conductor 123, second magnetic conductor 124, coil 125, reset elastic element 126, diaphragm 127, end cap 128.

[0033] Second valve group 13, pilot valve assembly 131, differential pressure valve assembly 132, back pressure chamber 1321, differential pressure diaphragm assembly 1322, differential pressure elastic element 1323, differential pressure valve plug 1324.

[0034] Pressure regulating valve 14, filter screen 15, constant open flame pressure stabilizing device 16;

[0035] Control module 21, energy storage module 22, converter 23, first switch 24, second switch 25, third switch 26, fourth switch 27. Detailed Implementation

[0036] This application provides a gas control system and its control method, which uses a constant flame burner to heat a thermoelectric stack for self-generation, operates using a low-voltage power supply provided by the thermoelectric stack, has high safety, is relatively easy to maintain, and has low cost.

[0037] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the gas control system in a non-operating state according to an embodiment of this application. Figure 2 This is a schematic diagram of the gas control system in operation according to an embodiment of this application. Figure 3 for Figure 1 The diagram shows the electrical control principle of the gas control system. Figure 4 This is a cross-sectional schematic diagram of the gas valve in a gas control system provided in one embodiment of this application. Figure 1 , Figure 2 and Figure 4 The dashed lines in the diagram indicate structures that cannot be visually displayed. Figure 1 and Figure 2 The double-dotted lines in the diagram represent control circuits or electrical control circuits.

[0039] In this embodiment, the gas control system includes a gas valve 10, an electronic controller 20, a thermopile 30, a constant flame burner 40, and a main furnace burner 50. The constant flame burner 40 is located beside the main furnace burner 50 so that its flame can ignite the main furnace burner 50. The thermopile 30 is located next to the constant flame burner 40, and after the constant flame burner 40 is ignited, the thermopile 30 can be heated to generate electricity.

[0040] The gas valve 10 has a first gas supply path and a second gas supply path. The first gas supply path is used to supply gas to the constant flame burner 40, and the second gas supply path is used to supply gas to the main furnace burner 50. It can be understood that the constant flame burner 40 can only be ignited when gas is supplied to it, and the burning constant flame burner 40 can only ignite the main furnace burner 50 when gas is supplied to it.

[0041] The gas valve 10 has a first valve port 114 on its first gas supply path and a second valve port 115 on its second gas supply path. That is, the first valve port 114 is located in both the first and second gas supply paths, or in other words, the first and second gas supply paths have overlapping path portions, and the first valve port 114 is located in the overlapping path portion.

[0042] The gas valve 10 includes a first valve group 12 and a second valve group 13. The first valve group 12 is used to open or close the first valve port 114, and the second valve group 13 is used to open or close the second valve port 115. When the first valve group 12 is in the position of closing the first valve port 114, the first gas supply path is cut off, and gas cannot be delivered to the constant flame burner 40. When the first valve group 12 is in the position of opening the first valve port 114, the first gas supply path is opened, and gas can be delivered to the constant flame burner 40. When at least one of the first valve group 12 and the second valve group 13 is in the position of closing the corresponding valve port, the second gas supply path is cut off, and gas cannot be delivered to the main furnace burner 50. When both the first valve group 12 and the second valve group 13 are in the position of opening the corresponding valve ports, the second gas supply path is opened, and gas can be delivered to the main furnace burner 50.

[0043] In this embodiment, the thermopile 30 provided in the constant flame burner 40 is used to supply power to the electronic controller 20, the first valve group 12 and the second valve group 13 of the gas control system.

[0044] The structure of the first valve group 12 is configured such that the first valve group 12 can be held in the position of opening the first valve port 114 when energized, and the first valve group 12 can be manually opened.

[0045] The electronic controller 20 includes a control module 21 and an energy storage module 22. The energy storage module 22 can supply power to the second valve group 13, and the control module 21 is used to control the on / off state of the power supply circuit of the second valve group 13.

[0046] It is understandable that the second valve group 13 has two power sources: one is the thermopile 30, and the other is the energy storage module 22 of the electronic controller 20. Either one can supply power to the second valve group 13, or both can supply power to the second valve group 13 at the same time, depending on the opening requirements of the second valve group 13.

[0047] In practical applications, the user can manually open the first valve group 12 to open the first gas supply path, allowing gas to be supplied to the constant flame burner 40. The user then ignites the constant flame burner 40, which heats up the thermopile 30 located in the constant flame burner 40 to generate electricity, which is then supplied to the first valve group 12, keeping the first valve group 12 energized. The first valve port 114 remains open, providing gas to the constant flame burner 40. The thermopile 30 also supplies power to the electronic controller 20. After being powered on, the electronic controller 20 determines whether to activate the power supply circuit of the second valve group 13 according to user settings. When the electronic controller 20 activates the power supply circuit of the second valve group 13, the second valve group 13 is in the open position (second valve port 115). Since the first valve group 12 is already in the open position, the second gas supply path is open, and gas can be supplied to the main furnace burner 50 through the first valve port 114 and the second valve port 115. The normally lit burner 40, located beside the main furnace burner 50, can ignite the gas supplied to the main furnace burner 50. When the electronic controller 20 cuts off the power supply circuit of the second valve group 13, the second valve group 13 is in the closed position (second valve port 115), the second gas supply path is cut off, and the main furnace burner 50 stops burning.

[0048] Based on the actual operation of the aforementioned gas control system, it can be seen that the system utilizes a combination of a constant-flame burner 40 and a thermopile 30 to achieve self-generation. The first valve group 12 is kept open by the electrical energy provided by the thermopile 30. The thermopile 30 supplies power to the electronic controller 20, which controls the on / off state of the power supply circuit for the second valve group 13, allowing it to open or close according to actual application requirements. Simultaneously, an energy storage device 22 is installed in the electronic controller 20 to assist in opening the second valve group 13, ensuring its smooth opening in low-voltage systems. This gas control system uses the constant-flame burner 40 to heat the thermopile 30 for power generation and ignites the main furnace burner 50 using the constant-flame burner 40. This eliminates the need for an external power source and external control modules, providing power to the system via the low-voltage electricity supplied by the thermopile 30. This design offers high safety, simple and convenient maintenance, and cost reduction.

[0049] like Figure 3 As shown, in this embodiment, the electronic controller 20 further includes a converter 23. The thermopile 30 is electrically connected to the control module 21 through the converter 23. The converter 23 includes a boost unit, which boosts the electrical energy provided by the thermopile 30 to the operating voltage of the control module 21. The control module 21 supplies power to the energy storage module 22, meaning the power supply for the energy storage module 22 is provided by the control module 21. After being boosted by the boost unit of the converter 23, the control module 21 can operate at a relatively high voltage, controlling the energy storage module 22 to supply power to the second valve group 13, ensuring that the second valve group 13 can be opened smoothly.

[0050] In a specific implementation, a first switch 24 is connected in series on the power supply circuit of the first valve group 12, a second switch 25 is connected in series on the energy storage module 22, a third switch 26 is connected in series on the power supply circuit of the second valve group 13, and the control module 21 of the electronic controller 20 is also used to control the on / off state of the first switch 24, the second switch 25 and the third switch 26.

[0051] It should be noted that, in order to ensure the normal operation of the gas control system, after the open flame burner 40 is ignited, the electrical energy provided by the thermopile 30 needs to ensure that the first valve group 12 is in the open first valve port 114 state for the system to work normally. Therefore, in actual settings, the first switch 24 can be set as a normally open switch. After the system starts working normally, if it is necessary to shut down the system, the control module 21 of the electronic controller 20 can control the first switch 24 to close to cut off the power supply circuit of the first valve group 12, so that the first valve group 12 closes the first valve port 114, thereby cutting off the gas supply and terminating the power supply.

[0052] The control module 21 can select the switching state of the second switch 25 or the third switch 26 according to the actual application needs. Specifically, when it is necessary to open the second valve group 13 and the energy storage module 22 is required to assist in providing power to the second valve group 13, the third switch 26 is opened to conduct the power supply circuit of the second valve group 13, and the second switch 25 is opened to load the power of the energy storage module 22 to the second valve group 13.

[0053] Additionally, a fourth switch 27 can be installed on the connection circuit between the control module 21 and the energy storage module 22 to ensure circuit safety. When the energy storage module 22 is needed to assist in supplying power to the second valve group 13, the control module 21 controls the fourth switch 27 and the second switch 25 to open, so as to turn on the energy storage module 22 to load the second valve group 13.

[0054] The main burner 50 of this gas control system is used to heat the heated medium, typically water. The gas control system can be applied to scenarios such as gas water heaters or gas boilers. The following example uses water as the heated medium.

[0055] The gas control system also includes a temperature sensor 70, which detects the temperature of the water heated by the main boiler burner 50. The heated water is stored in a water tank 80. The temperature sensor 70 is communicatively connected to the electronic controller 20 to provide feedback signals to the control module 21 of the electronic controller 20. The control module 21 can receive a set temperature command and control the on / off state of the power supply circuit of the second valve group 13 according to the set temperature command and the feedback signal from the temperature sensor 70.

[0056] In this embodiment, the gas control system also includes an igniter 60, which is used to ignite the constant flame burner 40. The igniter 60 can be manually operated to ignite the constant flame burner 40. Specifically, the igniter 60 can be a piezoelectric ignition device, which does not require power from the system and ensures safety.

[0057] In a specific implementation, the electronic controller 20 can be integrated into the gas valve 10 to simplify the structure. For example, the electronic controller 20 can be installed on the gas valve 10 near the first valve assembly 12.

[0058] In a specific implementation, the gas control system includes a control unit, which is used to input a set temperature zone command to the control module 21 of the electronic controller 20. The control unit is also used to manually open the first valve group 12.

[0059] like Figure 1 and Figure 2As shown, the control unit can specifically take the form of a knob 90, which can be connected to the operating end of the first valve group 12 and communicate with the electronic controller 20. In specific settings, the first valve group 12 can be manually opened by pressing the knob 90 against its operating end, and the system's operating mode can be switched by rotating the knob 90 to set the desired water temperature. It can be understood that the system has different operating modes, and different heating temperatures are required in different operating modes; that is, each operating mode corresponds to a set temperature. Inputting an operating mode command to the electronic controller 20 is equivalent to inputting a desired set temperature range command to the electronic controller 20.

[0060] The system's operating mode also includes a shutdown mode. When the system needs to be shut down, a shutdown command can be input to the electronic controller 20 via knob 90. After receiving the shutdown command, the electronic controller 20 can control the power supply circuit of the first valve group 12 to shut down the second valve group 12. In this way, the gas supply to the constant flame burner 40 can be cut off, the constant flame burner 40 can be extinguished, and the power supply of the thermopile 30 to the system can be terminated.

[0061] In other embodiments, the control unit may take other forms, not limited to knob 90.

[0062] In other embodiments, the structures for inputting commands to the electronic controller 20 and the structures for manually opening the first valve group 12 can be provided separately. In this case, the system's operating mode can be input to the electronic controller 20 via touch.

[0063] The following is based on Figure 4 This section primarily describes the specific structure of the gas valve 10, which can be applied to a gas control system.

[0064] In this embodiment, the gas valve 10 includes a valve body 11, and the aforementioned first gas supply path and second gas supply path are basically formed on the valve body 11.

[0065] like Figure 4 As shown, the valve body 11 has an air inlet channel 111, a first valve chamber 112, a second valve chamber 113, and a first flow channel 116. The air inlet channel 111 is connected to the first valve chamber 112 through the aforementioned first valve port 114. One end of the first flow channel 116 is connected to the first valve chamber 112, and the other end of the first flow channel 116 is used to connect to the constant flame burner 40. The first valve chamber 112 is connected to the second valve chamber 113 through the aforementioned second valve port 115. The second valve chamber 113 has an air outlet 1131, which is used to connect to the main furnace burner 50.

[0066] In practice, the other end of the first flow channel 116 can be connected to the open flame burner 40 via a capillary tube 100. The gas outlet 1131 of the second valve chamber 113 can be connected to the main furnace burner 50 via a gas pipeline.

[0067] Thus, the first gas supply path of the gas valve 10 includes an intake channel 111, a first valve chamber 112, and a first flow channel 116, and the second gas supply path of the gas valve 10 includes an intake channel 111, a first valve chamber 112, and a second valve chamber 113.

[0068] exist Figure 4 In the example shown, the outlet end of the first flow channel 116 of the gas valve 10 is located near the gas outlet 1131 of the second valve chamber 113; Figure 1 and Figure 2 In the example shown, the outlet end of the first flow channel 116 of the gas 10 is located near the side where the intake channel 111 is located. In actual applications, the first flow channel 116 can be set according to the positional relationship of the valve body 11 and surrounding related components, and is not limited to the example given in the figure.

[0069] In practice, a filter screen 15 can be installed in the air intake channel 111 to filter the gas flowing into the valve body 11, so as to prevent impurities in the gas from damaging the relevant valve structure and other components, or clogging the relevant holes and channels.

[0070] In a specific implementation, a constant flame pressure stabilizing device 16 is installed on the valve body 11. The constant flame pressure stabilizing device 16 is located between the first valve chamber 112 and the first flow channel 116, that is, the constant flame pressure stabilizing device 16 is located upstream of the first flow channel 116. The gas entering the first valve chamber 112 first passes through the constant flame pressure stabilizing device 16 for pressure regulation before entering the first flow channel 116 to ensure safety.

[0071] In this embodiment, the second valve assembly 13 for opening or closing the second valve port 115 includes a pilot valve assembly 131 and a differential pressure valve assembly 132. The aforementioned thermopile 30 and energy storage module 22 are specifically used to supply power to the pilot valve assembly 31, and the pilot valve assembly 131 is used to control the operation of the differential pressure valve assembly 132 to open or close the second valve port 115.

[0072] In specific implementation, the differential pressure valve assembly 132 is located within the first valve chamber 112. The differential pressure valve assembly 132 includes a back pressure chamber 1321, a differential pressure diaphragm assembly 1322, a differential pressure elastic element 1323, and a differential pressure valve plug 1324, with the differential pressure valve plug 1324 integrated onto the differential pressure diaphragm assembly 1322. Figure 4As shown, the upper part of the differential pressure diaphragm assembly 1322 is the second valve port 115, and the lower part is the back pressure chamber 1321. The upper part of the differential pressure diaphragm assembly 1322 is subjected to pressure from the first valve chamber 112. By adjusting the differential pressure force on the upper and lower sides of the differential pressure diaphragm assembly 1322, the differential pressure valve plug 1324 can be moved closer to or away from the second valve port 115 to close or open the second valve port 115. A differential pressure elastic element 1323 is provided below the differential pressure diaphragm assembly 1322 to realize the reset of the differential pressure valve plug 1324.

[0073] The pilot valve assembly 131 can be used to adjust the pressure on both sides of the differential pressure diaphragm group 1322 of the differential pressure valve assembly 132, so as to realize the opening of the second valve port 115 and the adjustment of the opening degree.

[0074] In a specific implementation, the valve body 10 also has a second flow channel 117 and a third flow channel 118.

[0075] The inlet end of the second flow channel 117 is connected to the first valve chamber 112, and the outlet end of the second flow channel 117 is connected to the second valve chamber 113. The pilot valve assembly 131 is located downstream of the inlet end of the second flow channel 117 and is used to open or close the second flow channel 117.

[0076] The inlet of the third flow channel 118 is connected to the second flow channel 117, and the outlet of the third flow channel 118 is connected to the back pressure chamber 1321 of the differential pressure valve assembly 132. The inlet of the third flow channel 118 is located between the inlet of the second flow channel 117 and the pilot valve assembly 131. In other words, the shut-off of the second flow channel 117 by the pilot valve assembly 131 only affects the amount of gas entering the second valve chamber 113 through the second flow channel 117, and does not affect the flow of gas between the second flow channel 117 and the third flow channel 118.

[0077] In application, when the first valve port 114 is opened by the first valve group 12, the gas flows in from the intake channel 111, enters the first valve chamber 112 through the first valve port 114, and the gas entering the first valve chamber 112 can flow into the second flow channel 117.

[0078] When the pilot valve assembly 131 is not energized, the pilot valve assembly 131 cuts off the second flow channel 117, that is, the gas flowing into the second flow channel 117 cannot enter the second valve chamber 113. However, the gas flowing into the second flow channel 117 can enter the back pressure chamber 1321 of the differential pressure valve assembly 132 through the third flow channel 118 connected to it. At this time, the upper pressure and lower pressure of the differential pressure diaphragm assembly 1322 of the differential pressure valve assembly 132 are balanced. Under the action of the differential pressure elastic element 1323, the differential pressure diaphragm assembly 1322 drives the differential pressure valve plug 1324 to remain in the closed position of closing the second valve port 115.

[0079] When the pilot valve assembly 131 is energized, it opens the second flow channel 117. At this time, part of the gas flowing into the second flow channel 117 can flow into the second valve chamber 113, and the other part can flow into the back pressure chamber 1321 of the differential pressure valve assembly 132 through the third flow channel 118. In this way, a pressure difference can be established on both sides of the differential pressure diaphragm assembly 1322 of the differential pressure valve assembly 132 to drive the differential pressure valve plug 1324 to open the second valve port 115, so that the gas can enter the second valve chamber 113 from the first valve chamber 112 through the second valve port 115, and flow from the second valve chamber 113 to the main furnace burner 50.

[0080] In a specific implementation, a pilot valve port can be provided on the second flow channel 117. The pilot valve assembly 131 can open or close the pilot valve port to open or close the second flow channel 117.

[0081] In its specific implementation, the gas valve 10 also includes a pressure regulating and stabilizing valve 14, which is located on the second flow channel 117 and downstream of the pilot valve assembly 131. That is, the gas entering the second flow channel 117 flows through the pilot valve assembly 131 and then flows to the pressure regulating and stabilizing valve 14. After being regulated and stabilized by the pressure regulating and stabilizing valve 14, the gas flows into the second valve chamber 113 and finally flows into the main furnace burner 50 from the gas outlet 1131.

[0082] The pressure regulating valve 14 can be set to adjust the gas flow rate, so that the differential pressure valve assembly 132 maintains a certain opening to meet the outlet pressure setting requirements.

[0083] In a specific implementation, the inlet end of the second flow channel 117 is provided with a normally open throttling orifice 1171 to regulate the amount of gas flowing into the second flow channel 117. The normally open throttling orifice 1171 can be a separate structural component assembled with the valve body 10, or it can be directly machined on the valve body 10.

[0084] Please refer to this as well. Figure 5 , Figure 5 for Figure 4 A magnified view of the location of the first valve group.

[0085] In this embodiment, the first valve assembly 13 of the gas valve 10 includes a valve stem 121, a valve seal 122, a reset elastic member 126, and an electromagnetic holding assembly. The valve seal 122 is securely fitted onto the valve stem 121, and the valve stem 121 can move relative to the valve body 11 along its own axis to move the valve seal 122 closer to or further away from the first valve port 114, thereby closing or opening the first valve port 114. The reset elastic member 126 is located between the valve seal 122 and the valve body 11, and is located on the side of the valve seal 122 away from the first valve port 114. Normally, the reset elastic member 126 can apply a spring force to the valve seal 122 to keep the valve seal 122 in the closed position of the first valve port 114.

[0086] When the electromagnetic holding component of the first valve group 13 is energized, it can keep the valve seal 122 in the position where the first valve port 114 is open.

[0087] In the gas control system, the electromagnetic holding assembly of the first valve group 13 is powered by the thermopile 30.

[0088] In its specific implementation, the electromagnetic holding assembly includes a first magnetic conductor 123, a second magnetic conductor 124, and a coil 125. The first magnetic conductor 123 is sleeved on the valve stem 121 and can move with it. The second magnetic conductor 124 and the coil 125 are integrated and installed within the valve body 10. When the coil 125 is energized, a magnetic attraction is generated between the second magnetic conductor 124 and the first magnetic conductor 123, causing the first magnetic conductor 123 to move the valve stem 121 to a position where it engages with the first magnetic conductor 123. This position is where the valve seal 122 opens the first valve port 114. It can be understood that the magnetic attraction between the second magnetic conductor 124 and the first magnetic conductor 123 enables the valve stem 121 to overcome the elastic force of the reset elastic member 126 and move towards the valve opening direction, maintaining it in the open position. It can be understood that the first magnetic conductor 123 is positioned on the side of the valve seal 122 facing the second magnetic conductor 124.

[0089] The structure of the electromagnetic holding assembly is such that the electrical energy provided by the thermopile 30 is sufficient to keep the first magnetic conductor 123 and the second magnetic conductor 124 in an engaged state, that is, the first valve group 13 can remain open under low power consumption conditions, thereby enabling the electrical energy provided by the thermopile 30 to meet the needs of multiple electrical components in the gas control system.

[0090] In a specific implementation, the valve stem 121 is movably inserted into the second magnetic conductor 124. The second magnetic conductor 124 has an annular groove with an opening facing the first magnetic conductor 123. The coil 125 is installed in this annular groove, which surrounds the valve stem 121. In this way, when the coil 125 is energized, a ring-shaped magnetic field is generated in the second magnetic conductor 124, which is beneficial to the attraction between the first magnetic conductor 123 and the second magnetic conductor 124.

[0091] Specifically, the first magnetic conductor 123 has a first end face 1231 facing the second magnetic conductor 124, and the second magnetic conductor 124 has a second end face 1241 facing the first magnetic conductor 123. The coil 125 is disposed behind the annular groove of the second magnetic conductor 124 and does not protrude from the second end face 1241 of the second magnetic conductor 124, so as to ensure that the first end face 1231 and the second end face 1241 can fit together after the first magnetic conductor 123 and the second magnetic conductor 124 are attracted together. In this way, a closed annular magnetic flux is formed between the first magnetic conductor 123 and the second magnetic conductor 124, which can ensure that the first valve port 114 is kept in the open position after the coil 125 is energized, thereby improving the safety and reliability of the product.

[0092] In specific implementation, the valve stem 121 has an operating end extending outside the valve body 11, allowing the user to manually operate the first valve assembly 12 via this operating end to manually open the first valve port 114. Combined with... Figure 1 and Figure 2 Understandably, the operating end of the valve stem 121 extending outside the valve body 11 can be connected to the knob 90. The user can directly press the knob 90. Under the pressing pressure, the knob 90 pushes the valve stem 121 down, thereby moving the valve seal 122 away from the first valve port 114, thus realizing the manual opening of the first valve port 114.

[0093] Specifically, a diaphragm 127 for airtight isolation is provided between the valve stem 121 and the valve body 11. The diaphragm 127 is located near the operating end of the valve stem 121 to prevent the airtightness of each chamber inside the valve body 11 from being affected by the valve stem 121 extending outside the valve body 11.

[0094] To facilitate the installation of the diaphragm 127, an end cap 128 is also provided. The diaphragm 127 is fitted onto the valve stem 121. The inner ring of the diaphragm 127 is airtightly connected to the valve stem 121, and the outer ring is airtightly connected to the valve body 11 under the pressure of the end cap 128.

[0095] Figure 5 In the example shown, the valve stem 121 includes a first stem portion 1211 and a second stem portion 1212, which are separately configured. The valve seal 122 and the first magnetic conductor 123 are sleeved on the first stem portion 1211. The first stem portion 1211 passes through the second magnetic conductor 124. The lower end of the second stem portion 1212 abuts against the first stem portion 1211, and the upper end extends out of the valve body 11 to form an operating end.

[0096] Under normal conditions, under the elastic force of the reset elastic element 126, the first magnetic conductor 123 is in contact with the valve seal 122, and the valve seal 122 is in the position of closing the first valve port 114. When the coil 125 is energized, under the magnetic attraction between the first magnetic conductor 123 and the second magnetic conductor 124, the valve stem 121 moves the first magnetic conductor 123 and the valve seal 122 together downward to the position where the first magnetic conductor 123 and the second magnetic conductor 124 are in contact and attracted. At this time, the valve seal 122 is in the position of opening the first valve port 114. When the coil 125 is de-energized, under the reset elastic force of the reset elastic element 126, the valve stem 121 moves the valve seal 122 and the first magnetic conductor 123 upward to the position of closing the first valve port 114.

[0097] In a specific configuration, the lower end of the second rod 1212 is inserted into the first rod 1211, and there is a certain gap between the two in the radial direction to prevent them from jamming and causing the first valve group 12 to fail.

[0098] When the first rod portion 1211 and the second rod portion 1212 are separate structures, a guide hole 119 can be provided on the valve body 11 for the second rod portion 1212 to pass through, so as to guide the second rod portion 1212 and prevent it from being deflected and stuck or unable to apply force to the first rod portion 1211, thus affecting the valve opening.

[0099] In other embodiments, the first stem portion 1211 and the second stem portion 1212 of the valve stem 121 can be fixedly connected by riveting, welding, or other methods, or the valve stem 121 can be made into an integral structure. In this case, the guide hole 119 may not be provided on the valve body 11 to prevent misalignment from causing the valve stem 121 to jam in axial movement.

[0100] In practice, the valve stem 121 is made of a non-soft magnetic material to avoid affecting the fit between the first magnetic conductor 123 and the second magnetic conductor 124.

[0101] refer to Figure 6 This application also provides a control method for a gas control system, which is the gas control system described in the foregoing embodiments. The control method will be described below using water as the heated medium. The control method includes:

[0102] Manually open the first valve group 12 of the gas valve 10, ignite the constant flame burner 40, and set the operating temperature zone of the gas control system.

[0103] Specifically, the user can manually press the knob 90 to move the valve stem 121 of the first valve group 12 downward to open the first valve port 114, so that the gas can enter the first valve chamber 112 from the gas inlet channel 111 through the first valve port 114, and flow to the constant flame burner 40 through the first flow channel 116; the constant flame burner 40 can be ignited by pressing the igniter 60; the set temperature zone for the operation of the gas control system can be achieved by rotating the knob 90. Rotating the knob 90 to the desired operating mode sets the set temperature zone where the water needs to be heated when the system is working.

[0104] After the constant flame burner 40 is ignited, it heats the thermopile 30, which in turn supplies power to the first valve group 12 and the electronic controller 20. Specifically, the thermopile 30 supplies power to the coil 125 of the electromagnetic holding assembly of the first valve group 12, keeping the first valve group 12 in the position where the first valve port 114 is open.

[0105] The electronic controller 20 can identify the current temperature of the water in the water tank 80 and compare it with the preset temperature range. When it is determined that the current temperature of the water is lower than the preset temperature range, the control module 21 of the electronic controller 20 controls the power supply circuit of the second valve group 13 to open the second valve port 115. The gas can flow into the second valve chamber 113 through the second valve port 115 and flow to the main furnace burner 50. The flame of the constant open flame burner 40 ignites the main furnace burner 50 to heat the water in the water tank 80.

[0106] The electronic controller 20 identifies the water temperature through the temperature sensor 70 installed inside the water tank 80.

[0107] When the temperature sensor 70 reports that the water in the water tank 80 has been heated to the set temperature zone, the control module 21 of the electronic controller 20 controls the power supply circuit of the second valve group 13 to be cut off, so that the second valve port 115 is closed, no gas is supplied to the main furnace burner 50, and the main furnace burner 50 is extinguished.

[0108] When the water level in tank 80 drops below the set temperature again, control module 21 activates the power supply circuit of the second valve group 13, igniting the main boiler burner 50 to heat the water in tank 80. This cycle repeats to maintain the water in tank 80 at a constant temperature.

[0109] It is understandable that the constant flame burner 40 remains in a combustion state during system operation.

[0110] In application, when the system needs to stop working, a shutdown command can be input to the gas control system. The control module 21 can then cut off the power supply circuit of the first valve group 12, extinguishing the constant flame burner 40 and terminating the power supply. The shutdown command can also be input by rotating the knob 90. Different operating modes can be sequentially set along the circumference of the knob 90, such as low, medium, high, and off.

[0111] The working principle of the electronic controller 20 has been explained above and will not be repeated here.

[0112] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A gas control system, characterized in that, It includes a gas valve, an electronic controller, a thermoelectric stack, a constant flame burner, and a main furnace burner; the constant flame burner is located beside the main furnace burner; The gas valve has a first gas supply path and a second gas supply path. The first gas supply path is used to supply gas to the constant open flame burner, and the second gas supply path is used to supply gas to the main furnace burner. The first gas supply path is provided with a first valve port, and the second gas supply path is provided with a first valve port and a second valve port; The gas valve includes a first valve group and a second valve group, wherein the first valve group is used to open or close the first valve port, and the second valve group is used to open or close the second valve port. The thermopile is located in the open flame burner, and the thermopile is used to supply power to the electronic controller, the first valve group and the second valve group; The first valve assembly can remain in the open position when energized, and the first valve assembly can be manually opened. The electronic controller includes a control module and an energy storage module. The energy storage module can supply power to the second valve group, and the control module is used to control the on / off state of the power supply circuit of the second valve group.

2. The gas control system according to claim 1, characterized in that, The electronic controller includes a converter, and the thermopile is electrically connected to the control module through the converter. The converter includes a boost unit, which is used to boost the electrical energy provided by the thermopile to the operating voltage of the control module. The control module is used to supply power to the energy storage module.

3. The gas control system according to claim 1, characterized in that, A first switch is connected in series in the power supply circuit of the first valve group, a second switch is connected in series in the energy storage module, a third switch is connected in series in the power supply circuit of the second valve group, and the control module is used to control the on / off state of the first switch, the second switch and the third switch.

4. The gas control system according to claim 1, characterized in that, The gas control system further includes a temperature sensor for detecting the temperature of the medium heated by the main furnace burner; the control module is used to receive a set temperature zone command and to control the on / off state of the power supply circuit of the second valve group according to the set temperature zone command and the feedback signal of the temperature sensor.

5. The gas control system according to claim 1, characterized in that, The gas control system also includes an igniter, which is a piezoelectric ignition device used to ignite the conventional open flame burner.

6. The gas control system according to any one of claims 1-5, characterized in that, The electronic controller is integrated into the gas valve.

7. The gas control system according to claim 6, characterized in that, The gas control system also includes a control unit, which is used to manually open the first valve group and to input a set temperature zone command to the control module.

8. The gas control system according to any one of claims 1-5, characterized in that, The second valve assembly includes a pilot valve assembly and a differential pressure valve assembly. The thermopile and the energy storage module are used to supply power to the pilot valve assembly, and the pilot valve assembly is used to control the operation of the differential pressure valve assembly to open or close the second valve port.

9. A control method for a gas control system, characterized in that, The gas control system is the gas control system according to any one of claims 1-8, and the control method includes: The first valve group is manually opened, the constant flame burner is ignited, and the set temperature zone for the operation of the gas control system is set; the thermopile supplies power to the first valve group and the electronic controller under the heating effect of the constant flame burner. The electronic controller identifies the current temperature of the heated medium. When it determines that the current temperature is lower than the set temperature zone, the control module controls the power supply circuit of the second valve group to be turned on, and the main furnace burner is ignited by the flame of the constant open flame burner. When the temperature of the heated medium reaches the set temperature zone, the control module controls the power supply circuit of the second valve group to be turned off.

10. The control method according to claim 9, characterized in that, A shutdown command is input to the gas control system, and the control module cuts off the power supply circuit to the first valve group.

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