Gas stove system

Abstract

The utility model provides a gas stove system, relates to the technical field of household appliances, and aims to reduce the risk of gas leakage caused by the fact that an electromagnetic valve cannot be normally closed. The gas stove system comprises the gas stove protection device, and the gas stove protection device comprises a plurality of electromagnetic valves, a control chip and a flame detection sensor. The multiple electromagnetic valves are sequentially arranged on the gas conveying pipeline and connected with the control chip, and the flame detection sensor is connected with the gas stove and the control chip. The flame detection sensor is configured to detect whether flames are generated in the gas stove or not and send a first signal to the control chip under the condition that the flames are detected in the gas stove. And when no flame is detected in the gas stove, a second signal is sent to the control chip. The control chip is configured to control the multiple electromagnetic valves to be kept in an open state under the condition that the first signal is received. And under the condition that the second signal is received, the multiple electromagnetic valves are controlled to be closed.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field, especially a gas -cooker system. BACKGROUND

[0002] The gas -cooker is indispensable domestic appliance in people's daily life, is the routine electric appliance of people's food material cooking.

[0003] But people can meet the ignition failure of gas -cooker in the use process, or in the combustion process, meet the sudden flameout situation.

[0004] In this case, once the electromagnetic valve that controls gas delivery cannot normally close, will cause the continuous leakage of gas, causes the big security risk, and even possibly can brew the fire. CONTENT OF UTILITY MODEL

[0005] The utility model embodiment provides a gas -cooker system, aims at can reduce the risk of gas leakage because of electromagnetic valve cannot normally close under the condition that the ignition of gas -cooker fails or is halfway out.

[0006] To achieve the above object, the embodiment of the utility model adopts the following technical scheme:

[0007] The utility model provides a gas -cooker system, including gas -cooker, gas delivery pipeline and gas -cooker protection device, and the output of gas delivery pipeline is connected with gas -cooker. Gas -cooker protection device includes: a plurality of electromagnetic valves, control chip and flame detection sensor. A plurality of electromagnetic valves are sequentially arranged on gas delivery pipeline, and a plurality of electromagnetic valves are connected with control chip, and flame detection sensor is connected with gas -cooker, and flame detection sensor is also electrically connected with control chip. Flame detection sensor is configured to: detect whether flame is produced in gas -cooker, and under the condition that detecting that there is flame in gas -cooker, first signal is sent to control chip. Under the condition that detecting that there is no flame in gas -cooker, second signal is sent to control chip. Control chip is configured to: under the condition that receiving first signal, control a plurality of electromagnetic valves to keep the state of opening. Under the condition that receiving second signal, control a plurality of electromagnetic valves to close.

[0008] The plurality of electromagnetic valves are sequentially arranged on the gas delivery pipeline. In a normal case, the gas stove ignites successfully, the flame detection sensor detects that there is a flame in the gas stove, and sends a first signal to the control chip. At this time, in order to maintain the combustion of the flame, the gas needs to be continuously supplied from the gas delivery pipeline, so the control chip controls all the electromagnetic valves to open after receiving the first signal. In the case of failure of the gas stove ignition, or in the case of sudden flameout during combustion, the flame detection sensor cannot detect the flame in the gas stove. At this time, if the electromagnetic valve is allowed to remain in the open state, it will cause continuous leakage of gas. Therefore, in this case, the flame detection sensor sends a second signal to the control chip to control all the electromagnetic valves to close. Even if part of the electromagnetic valve loses control or is damaged, as long as one of the electromagnetic valves can normally close, the output of the gas in the gas delivery pipeline can be cut off, thereby ensuring the safety of the user.

[0009] As a possible implementation manner, the gas stove includes a switch knob, the control chip is further connected with the switch knob, and the control chip is further configured to: in a case where the switch knob is in an open state, the control chip controls the plurality of electromagnetic valves to open. In a case where the switch knob is in a closed state, the control chip controls the plurality of electromagnetic valves to close. The flame detection sensor is further configured to: in the case where the switch knob is in the open state, detect whether a flame is generated in the gas stove.

[0010] As a possible implementation manner, the gas stove protection device further includes a processor and a plurality of pressure sensors. The processor is electrically connected with the control chip. The plurality of pressure sensors are respectively arranged on the gas delivery pipeline and located between adjacent two electromagnetic valves and between the electromagnetic valve and the output port of the gas delivery pipeline, and the pressure sensors are electrically connected with the processor. The pressure sensors are configured to: in a case where the switch knob is in a closed state, detect pressure values of positions on the gas delivery pipeline and transmit the pressure values to the processor. The processor is configured to: in the case where the switch knob is in the closed state, control the pressure sensors to work. The processor is configured to: judge magnitudes of the pressure values detected by the plurality of pressure sensors, and in a case where the pressure values detected by the plurality of pressure sensors are consistent, send a third signal to the control chip. The control chip is further configured to: in a case where the third signal is received, control the gas stove to fail to ignite.

[0011] As a possible implementation manner, the gas stove further includes an alarm device, the alarm device is connected with the control chip, and the control chip is configured to control the alarm device to give a warning in the case where the third signal is received.

[0012] As a possible implementation manner, the control alarm device includes a buzzer.

[0013] As a possible implementation manner, the control chip comprises a plurality of sub-control chips, and the plurality of sub-control chips are connected with the plurality of electromagnetic valves in one-to-one correspondence. The flame detection sensor is also electrically connected with the plurality of sub-control chips. The flame detection sensor is configured to detect whether a flame is generated in the gas stove, and send a first signal to the plurality of sub-control chips in a case where it is detected that the flame is generated in the gas stove. The flame detection sensor is configured to send a second signal to the plurality of sub-control chips in a case where it is detected that the flame is not generated in the gas stove. The sub-control chip is configured to control the connected electromagnetic valve to keep open in a case where the first signal is received. The sub-control chip is configured to control the connected electromagnetic valve to close in a case where the second signal is received.

[0014] As a possible implementation manner, the gas stove comprises a switch knob. The plurality of sub-control chips are also connected with the switch knob, and the control chip is further configured to control the sub-control chip to control the connected electromagnetic valve to open in a case where the switch knob is open. The control chip is further configured to control the sub-control chip to control the connected electromagnetic valve to close in a case where the switch knob is closed.

[0015] As a possible implementation manner, the gas stove protection device further comprises a plurality of watchdog circuits, the plurality of watchdog circuits are connected with the plurality of sub-control chips in one-to-one correspondence, and the plurality of sub-control chips communicate with each other. The sub-control chip is configured to send a watchdog signal to the watchdog circuit after a preset time interval. The watchdog circuit is configured to send a reset signal to the sub-control chip in a case where the watchdog signal is not received after the preset time interval. In a case where any sub-control chip receives the reset signal, the remaining sub-control chips control the connected electromagnetic valve to close.

[0016] As a possible implementation manner, any sub-control chip controls the electromagnetic valve to close in a case where the communication reply of any other sub-control chip cannot be received.

[0017] The application also provides a gas stove system, which comprises a gas stove, a gas delivery pipeline and a gas stove protection device. The output port of the gas delivery pipeline is connected with the gas stove. The gas stove protection device comprises a plurality of electromagnetic valves and a control chip. The plurality of electromagnetic valves are arranged on the gas delivery pipeline in sequence, and the plurality of electromagnetic valves are connected with the control chip. The control chip controls the plurality of electromagnetic valves to close in a case where an abnormal flame-out signal of the gas stove is received. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical scheme of the application, and constitute a part of the specification, and are used together with the embodiments of the application to explain the technical scheme of the application, and do not constitute a limitation on the technical scheme of the application.

[0019] Figure 1 A gas stove system composition diagram provided for the embodiments of the application;

[0020] Figure 2 A schematic view of a gas stove and a gas delivery pipeline is provided for the embodiments of the present application;

[0021] Figure 3 A gas stove ignition schematic diagram is provided for the embodiments of the present application;

[0022] Figure 4 A gas stove ignition schematic diagram is provided for the embodiments of the present application;

[0023] Figure 5 A gas stove protection device composition diagram is provided for the embodiments of the present application;

[0024] Figure 6 A gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0025] Figure 7 A gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0026] Figure 8 Another gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0027] Figure 9 Another gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0028] Figure 10 Another gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0029] Figure 11 Another gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0030] Figure 12 Another gas stove protection device schematic diagram is provided for the embodiments of the present application;

[0031] Figure 13 A schematic diagram of a gas stove protection device is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" in this utility model have the meaning of establishing conductivity. The specific meaning needs to be understood in conjunction with the context.

[0036] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0037] A gas stove is a kitchen appliance that uses gaseous fuels such as manufactured gas, liquefied petroleum gas, and natural gas for direct-fire heating. It is also known as a gas stove, stove plate, stove platform, or stove.

[0038] For example, such as Figure 1 As shown, Figure 1 This application provides a schematic diagram of a gas stove system according to an embodiment. Figure 1 The gas stove system 100 shown includes a gas stove 1, which is an indispensable household appliance in people's daily lives and a common appliance for cooking food.

[0039] The gas stove system 100 also includes a gas delivery pipe 2, combined with Figure 2 , Figure 2 A schematic diagram of a gas stove and a gas delivery pipeline according to an embodiment of this application is shown. (Refer to...) Figure 2 It can be seen that the outlet 2-1 of the gas delivery pipe 2 is connected to the gas stove 1.

[0040] As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 3 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1.

[0041] As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 2 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1.

[0042] As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 2 、 Figure 3 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 4 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 3 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 4 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1.

[0043] As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 4 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1.

[0044] As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1. Figure 3 As shown in FIG. 1, the gas stove 1 is provided with a gas delivery pipe 2, and the gas delivery pipe 2 is provided with an output port 2-1.

[0045] However, users may encounter situations where the gas stove fails to ignite or suddenly goes out during combustion. For example, when a user rotates the gas stove's control knob from the closed position to the open position (from OFF to ON), no flame is produced. Another example is when the flame suddenly goes out after successful ignition and during cooking, even though the control knob is still in the open position.

[0046] In the above situation, if the solenoid valve controlling the gas supply fails to close properly, for example, if the circuit controlling the opening or closing of the solenoid valve fails, it will cause continuous gas leakage, resulting in significant safety hazards and possibly even fire, which greatly threatens the personal safety of users.

[0047] In view of this, embodiments of this application provide a gas stove protection device, which is applied to, for example... Figure 1 The gas stove system shown. (Refer to...) Figure 5 , Figure 5 This is a diagram illustrating the composition of a gas stove protection device provided in an embodiment of this application.

[0048] The gas stove protection device 200 includes multiple solenoid valves 21, such as Figure 6 As shown, multiple solenoid valves 21 are sequentially arranged on the gas delivery pipeline. Specifically, a first solenoid valve 211, a second solenoid valve 212, and a third solenoid valve 213 are sequentially arranged on the gas delivery pipeline. The delivery of gaseous fuels such as manufactured gas, liquefied petroleum gas (LPG), and natural gas to the gas delivery pipeline is controlled by opening and closing these three valves. When all three valves are open, manufactured gas, LPG, and natural gas can be delivered to the gas stove. When any one of these valves is closed, the supply of manufactured gas, LPG, and natural gas is cut off by the solenoid valve 21.

[0049] The gas stove protection device 200 also includes a control chip 3, see reference. Figure 6 Multiple solenoid valves 21 are connected to the control chip 3. Specifically, the first solenoid valve 211, the second solenoid valve 212, and the third solenoid valve 213 are connected to the control chip 3. The control chip 3 controls the opening and closing of the solenoid valves 21.

[0050] The gas stove protection device 200 also includes a flame detection sensor 4, as shown in the reference. Figure 6The flame detection sensor 4 is electrically connected with the control chip 3, and the flame detection sensor 4 is also connected with the gas stove 1, and the flame detection sensor 4 can detect whether there is a flame on the gas stove 1. The flame detection sensor 4 is configured to detect whether a flame is generated in the gas stove 1, and in the case that a flame is detected in the gas stove 1, a first signal is sent to the control chip 3. In the case that no flame is detected in the gas stove 1, a second signal is sent to the control chip 3.

[0051] The first signal indicates that the gas stove 1 is working normally, and the second signal indicates that the gas stove 1 fails to ignite or the flame is extinguished halfway. The control chip 3 is configured to control the plurality of electromagnetic valves 21 to remain open in the case that the first signal is received. In the case that the second signal is received, the plurality of electromagnetic valves 21 are controlled to be closed.

[0052] For example, in the case that the gas stove 1 works normally, that is, the ignition is successful and no flame is extinguished halfway, the flame detection sensor 4 can detect that there is a flame on the gas stove 1. Since the flame detection sensor 4 is connected with the control chip 3, the flame sensor 4 can transmit the first signal to the control chip 3. The control chip 3 receives the first signal, controls the first electromagnetic valve 211, the second electromagnetic valve 212 and the third electromagnetic valve 213 to remain open, so that the gas fuel such as artificial gas, liquefied petroleum gas and natural gas can be continuously delivered, and the flame on the gas stove 1 can be continuously burned.

[0053] In the case that the gas stove 1 fails to ignite or the flame is extinguished halfway, that is, the control chip 3 receives the second signal, the first electromagnetic valve 211, the second electromagnetic valve 212 and the third electromagnetic valve 213 are controlled to be closed, so that the gas fuel such as artificial gas, liquefied petroleum gas and natural gas is blocked by the electromagnetic valve 21, thereby preventing safety hazards caused by gas leakage.

[0054] The plurality of electromagnetic valves 21 are arranged on the gas delivery pipeline in sequence. In the normal case, the gas stove 1 ignites successfully, the flame detection sensor 4 detects that there is a flame in the gas stove 1, and sends the first signal to the control chip 3. At this time, in order to maintain the combustion of the flame, the gas needs to be continuously supplied from the gas delivery pipeline, so the control chip 3 controls all the electromagnetic valves 21 to be opened after receiving the first signal.

[0055] When the gas stove 1 fails to ignite, or in the case of sudden flameout during combustion, the flame detection sensor 4 cannot detect the flame in the gas stove 1. At this time, if the electromagnetic valve 21 is allowed to remain in the open state, it will cause continuous gas leakage. Therefore, in this case, the flame detection sensor 4 sends the second signal to the control chip 3 to control all the electromagnetic valves 21 to be closed.

[0056] Even if some of the solenoid valves 21 lose control or are damaged, as long as one of the solenoid valves 21 can be normally closed, the output of the gas in the gas delivery pipeline can be cut off, thereby ensuring the safety of the user. For example, as shown in Figure 7 even if the first solenoid valve 211 and the third solenoid valve 213 lose control, as long as the second solenoid valve 212 can be closed when the control chip 3 receives the second signal, the artificial gas, liquefied petroleum gas, natural gas and other gas fuels can be blocked on one side of the second solenoid valve 212, thereby preventing further leakage of the gas and ensuring the safety of the user.

[0057] It should be noted that the above description only takes the gas stove protection device including three solenoid valves as an example for description, and in actual application, there can be more or fewer solenoid valves, and the number of solenoid valves is not limited in the embodiments of the present application.

[0058] As a possible implementation manner, the control chip is further connected with the switch knob, and the control chip is further configured to: in a case that the switch knob is in an open state, the control chip controls the plurality of solenoid valves to be opened. In a case that the switch knob is in a closed state, the control chip controls the plurality of solenoid valves to be closed. The flame detection sensor is further configured to: in a case that the switch knob is in the open state, detect whether a flame is generated in the gas stove.

[0059] When the user does not use the gas stove, the solenoid valve should be in a closed state, and the artificial gas, liquefied petroleum gas, natural gas and other gas fuels are blocked on one side of the solenoid valve, thereby preventing gas leakage. When the gas stove is used, the artificial gas, liquefied petroleum gas, natural gas and other gas fuels need to be conducted to maintain the flame combustion, and therefore the solenoid valve needs to be in an open state.

[0060] Since the ignition failure or the sudden flameout in the combustion process can only occur during the use of the gas stove, the flame sensor is configured to detect whether a flame is generated in the gas stove in a case that the switch knob is in an open state. In a case that the switch knob is in a closed state, it means that the gas stove will not be used, and the solenoid valve is already in a closed state, and flame detection is not needed.

[0061] As a possible implementation manner, as shown in Figure 8 the gas stove protection device 200 further includes a plurality of pressure sensors 5. The plurality of pressure sensors 5 are respectively arranged on the gas delivery pipeline 2 and located between adjacent two solenoid valves 21 and between the solenoid valve 21 and the output port 2-1 of the gas delivery pipeline 2.

[0062] Specifically, the first pressure sensor 51 is arranged between the first electromagnetic valve 211 and the second electromagnetic valve 212, the second pressure sensor 52 is arranged between the second electromagnetic valve 212 and the third electromagnetic valve 213, and the third pressure sensor 53 is arranged between the third electromagnetic valve 213 and the output port 2-1 of the gas delivery pipeline 2.

[0063] With reference to Figure 8 The gas stove protection device 200 further comprises a processor 6, which is electrically connected with the control chip 3 and also electrically connected with the first pressure sensor 51, the second pressure sensor 52 and the third pressure sensor 53.

[0064] The pressure sensor 5 is configured to detect the pressure value at the position of the gas delivery pipeline when the switch knob is in the off state and transmit the pressure value to the processor 6. For example, the first pressure sensor 51 detects the pressure value between the first electromagnetic valve 211 and the second electromagnetic valve 212; the second pressure sensor 52 detects the pressure value between the second electromagnetic valve 212 and the third electromagnetic valve 213; and the third pressure sensor 53 detects the pressure value between the third electromagnetic valve 213 and the output port 2-1 of the gas delivery pipeline 2.

[0065] The processor 6 is configured to control the pressure sensor 5 to work when the switch knob is in the off state, judge the sizes of the pressure values detected by the plurality of pressure sensors 5, and send a third signal to the control chip 3 if the pressure values detected by the plurality of pressure sensors 5 are consistent. The control chip 3 is further configured to control the gas stove 1 to be unable to be ignited when the third signal is received.

[0066] When the switch knob is in the off state, the electromagnetic valve 21 should be in the closed state. In the case that all the electromagnetic valves are normal, the pressure values measured by the first pressure sensor 51, the second pressure sensor 52 and the third pressure sensor 53 are different. However, if all the electromagnetic valves 21 are out of control, for example, the first electromagnetic valve 211, the second electromagnetic valve 212 and the third electromagnetic valve 213 are all in the open state, even if the switch knob is in the off state, the user does not need to use the gas stove 1, but there is still gas leakage.

[0067] In this case, once the user ignites, the gas stove cannot be turned off, which has a great safety hazard. Therefore, once the processor detects that the pressure values detected by the plurality of pressure sensors 5 are equal, a third signal will be sent to the control chip 3, and the control chip 3 will receive the third signal to perform a locking operation on the gas stove 1 so that it cannot be ignited.

[0068] Since in this case all the electromagnetic valves are out of control, there is a risk of gas leakage, therefore, as a possible implementation manner, the processor 6 is configured to send a third signal to the control chip 3 if the pressure values detected by the plurality of pressure sensors 5 are equal. Figure 9As shown, the gas stove further comprises an alarm device 7. The alarm device 7 is connected with the control chip 3, and the control chip 3 is configured to control the alarm device 7 to give a warning in the case of receiving the third signal.

[0069] For example, the alarm device 7 is a buzzer, and the control chip 3 controls the buzzer to buzz to remind the user of the risk of the electromagnetic valve 21 out of control and gas leakage in the case of receiving the third signal.

[0070] By comparing the pressure value measured by the pressure sensor at the location with the pressure value measured by the pressure sensor at the location under normal circumstances, the failure position of the electromagnetic valve can also be determined. For example, the pressure values measured by the first pressure sensor, the second pressure sensor and the third pressure sensor at the locations under normal circumstances are a, b and c respectively.

[0071] When the first electromagnetic valve is out of control, i.e. the first electromagnetic valve is opened, the second electromagnetic valve and the third electromagnetic valve are closed. At this time, the pressure value measured by the first pressure sensor at the location is greater than a, the pressure value measured by the second pressure sensor at the location is equal to b, and the pressure value measured by the third pressure sensor at the location is equal to c.

[0072] When the second electromagnetic valve is out of control, i.e. the second electromagnetic valve is opened, the first electromagnetic valve and the third electromagnetic valve are closed. At this time, the pressure value measured by the first pressure sensor at the location is equal to the pressure value measured by the second pressure sensor at the location, and the pressure value measured by the third pressure sensor at the location is equal to c.

[0073] When the third electromagnetic valve is out of control, i.e. the third electromagnetic valve is opened, the first electromagnetic valve and the second electromagnetic valve are closed. The pressure value measured by the first pressure sensor at the location is equal to a, and the pressure value measured by the second pressure sensor at the location is equal to the pressure value measured by the third pressure sensor at the location.

[0074] As a possible implementation manner, as shown in the figure, Figure 10 As shown, the control chip 3 comprises a plurality of sub-control chips 31, and the plurality of sub-control chips 31 are connected with the plurality of electromagnetic valves 21 one by one. The flame detection sensor 4 is also electrically connected with the plurality of sub-control chips 31.

[0075] Specifically, the control chip 3 comprises a first sub-control chip 311, a second sub-control chip 312 and a third sub-control chip 313. The first sub-control chip 311 is connected with the first electromagnetic valve 211, the second sub-control chip 312 is connected with the second electromagnetic valve 212, and the third sub-control chip 313 is connected with the third electromagnetic valve 213. The first sub-control chip 311, the second sub-control chip 312 and the third sub-control chip 313 are also connected with the flame detection sensor 4.

[0076] The flame detection sensor 4 is configured to detect whether a flame is generated in the gas stove 1, and send a first signal to the plurality of sub-control chips 31 when a flame is detected in the gas stove 1. The flame detection sensor 4 sends a second signal to the plurality of sub-control chips 31 when no flame is detected in the gas stove 1.

[0077] For example, when the gas stove 1 is working normally, i.e. ignition is successful and no flameout occurs, the flame detection sensor 4 can detect that there is a flame on the gas stove 1. Since the flame detection sensor 4 is connected to the plurality of sub-control chips 31, the flame sensor 4 can send the first signal to each sub-control chip 31, for example, the first sub-control chip 311, the second sub-control chip 312 and the third sub-control chip 313 receive the first signal.

[0078] When the gas stove 1 fails to ignite or flameout occurs, the flame detection sensor 4 cannot detect that there is a flame on the gas stove 1. The flame sensor 4 sends the second signal to each sub-control chip 31, for example, the first sub-control chip 311, the second sub-control chip 312 and the third sub-control chip 313 receive the second signal.

[0079] The sub-control chip 31 is configured to control the connected electromagnetic valve 21 to remain open when the first signal is received. When the second signal is received, the connected electromagnetic valve 21 is controlled to be closed.

[0080] Since the first signal indicates that the gas stove 1 is working normally, when the first signal is received by the sub-control chip 31, the connected electromagnetic valve 21 is controlled to remain open, thereby ensuring the supply of gas. For example, the first sub-control chip 311 controls the first electromagnetic valve 211 to remain open, the second sub-control chip 312 controls the second electromagnetic valve 212 to remain open, and the third sub-control chip 313 controls the third electromagnetic valve 213 to remain open.

[0081] Since the second signal indicates that the gas stove 1 fails to ignite or flameout occurs, when the second signal is received by the sub-control chip 31, the connected electromagnetic valve 21 is controlled to be closed, thereby ensuring that the gas is blocked on one side of the electromagnetic valve 21. For example, the first sub-control chip 311 controls the first electromagnetic valve 211 to be closed, the second sub-control chip 312 controls the second electromagnetic valve 212 to be closed, and the third sub-control chip 313 controls the third electromagnetic valve 213 to be closed.

[0082] The arrangement of the plurality of sub-control chips enables even if one of the sub-control chips fails, when the gas stove fails to ignite or goes out halfway, the normal sub-control chip can still control the connected solenoid valve to close, and as long as one of the solenoid valves can normally close, the output of the gas in the gas delivery pipeline can be cut off, thereby further ensuring the safety of the user.

[0083] As a possible implementation manner, the gas stove includes a switch knob. The plurality of sub-control chips are further connected with the switch knob, and the control chip is further configured to: in the case that the switch knob is in an open state, the sub-control chip controls the connected solenoid valve to open. In the case that the switch knob is in a closed state, the sub-control chip controls the connected solenoid valve to close.

[0084] As a possible implementation manner, as shown in Figure 11 The gas stove protection device 200 further includes a plurality of watchdog circuits 8, the plurality of watchdog circuits 8 are connected with the plurality of sub-control chips 31 one by one, and the plurality of sub-control chips 31 communicate with each other. The sub-control chip 31 is configured to: send a watchdog signal to the watchdog circuit 8 after a preset time interval. The watchdog circuit 8 is configured to: in the case that the watchdog signal is not received after the preset time interval, send a reset signal to the sub-control chip 31. In the case that any sub-control chip 31 receives the reset signal, the remaining sub-control chips 31 control the connected solenoid valve 21 to close.

[0085] Specifically, referring to Figure 11 The gas stove protection device 200 further includes a first watchdog circuit 81, a second watchdog circuit 82 and a third watchdog circuit 83. Among them, the first watchdog circuit 81 is connected with the first sub-control chip 311, the second watchdog circuit 82 is connected with the second sub-control chip 312, and the third watchdog circuit 83 is connected with the third sub-control chip 313.

[0086] For example, the first sub-control chip 311 sends a watchdog signal to the first watchdog circuit 81 after a preset time interval, at the same time, the second sub-control chip 312 sends a watchdog signal to the second watchdog circuit 82 after a preset time interval, and the third sub-control chip 313 sends a watchdog signal to the third watchdog circuit 83 after a preset time interval.

[0087] When the sub-control chip can send a watchdog signal to the corresponding connected watchdog circuit after a preset time interval, it means that the sub-control chip can normally operate. Once the sub-control chip fails and cannot work normally, it will not be able to send a watchdog signal to the corresponding connected watchdog circuit after a preset time interval, at which time the watchdog circuit will send a reset signal to the corresponding connected sub-control chip to restart the corresponding sub-control chip.

[0088] As a possible implementation manner, as shown in Figure 12 , in terms of connection form, the watchdog circuit can also be integrated in the internal part of the sub-control chip, for example, the first watchdog circuit 81 is integrated in the internal part of the first sub-control chip 311, the second watchdog circuit 82 is integrated in the internal part of the second sub-control chip 312, and the third watchdog circuit 83 is integrated in the internal part of the third sub-control chip 313.

[0089] As a possible implementation manner, any sub-control chip controls the solenoid valve to close in the case that it cannot receive the communication reply of any other sub-control chip. Referring to Figure 11 , the first sub-control chip 311 can communicate with the second sub-control chip 312 and the third sub-control chip 313. The second sub-control chip 312 can communicate with the first sub-control chip 311 and the third sub-control chip 313. The third sub-control chip 313 can communicate with the first sub-control chip 311 and the second sub-control chip 312.

[0090] When any sub-control chip cannot receive the communication reply of any other sub-control chip, for example, the first sub-control chip 311 cannot receive the communication reply of the second sub-control chip 312, it means that the first sub-control chip 311 is likely to malfunction, which may cause the control of the solenoid valve to fail. Therefore, the remaining normal sub-control chips, for example, the second sub-control chip 312 and the third sub-control chip 313, control the solenoid valve to close.

[0091] The application also provides a gas stove protection device, as shown in Figure 13 . Referring to Figure 13 , the gas stove protection device 200 is applied to the gas stove system 100 as shown in Figure 1 , Figure 2 , the gas stove system 100 includes a gas stove 1 and a gas delivery pipeline 2, and the output port 2-1 of the gas delivery pipeline 2 is connected with the gas stove 1. The gas stove protection device 200 includes a plurality of solenoid valves 21 and a control chip 3. Among them, the plurality of solenoid valves 21 are arranged on the gas delivery pipeline 2 in sequence, the plurality of solenoid valves 21 are connected with the control chip 3, and the control chip 3 controls the plurality of solenoid valves 21 to close in the case of receiving an abnormal flameout signal of the gas stove.

[0092] It should be noted that the abnormal flameout signal of the gas stove in the case of "the control chip 3 controls the plurality of solenoid valves 21 to close in the case of receiving an abnormal flameout signal of the gas stove" refers to the case that the gas stove 1 fails to ignite or goes out halfway.

[0093] The plurality of electromagnetic valves are sequentially arranged on the gas conveying pipeline, and since the plurality of electromagnetic valves are connected with the control chip, when the gas stove fails to ignite or suddenly goes out during combustion, the control chip can control the plurality of electromagnetic valves to be closed. In this case, even if part of the electromagnetic valves lose control or are damaged, as long as one of the electromagnetic valves can normally close, the output of the gas in the gas conveying pipeline can be cut off, thereby ensuring the safety of the user.

[0094] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gas hob system, characterized in that The gas stove system comprises a gas stove, a gas delivery pipeline and a gas stove protection device, the output of the gas delivery pipeline is connected with the gas stove; The gas stove protection device comprises: a plurality of electromagnetic valves, which are sequentially arranged on the gas delivery pipeline; a control chip, the plurality of electromagnetic valves are connected with the control chip; a flame detection sensor, which is connected with the gas stove and also electrically connected with the control chip; The flame detection sensor is configured to detect whether a flame is generated in the gas stove, and send a first signal to the control chip if a flame is detected in the gas stove, and send a second signal to the control chip if no flame is detected in the gas stove; The control chip is configured to control the plurality of electromagnetic valves to remain open if the first signal is received, and control the plurality of electromagnetic valves to close if the second signal is received.

2. The gas stove system according to claim 1, wherein The gas stove comprises a switch knob; The control chip is also connected with the switch knob, and the control chip is also configured to control the plurality of electromagnetic valves to open if the switch knob is open, and control the plurality of electromagnetic valves to close if the switch knob is closed; The flame detection sensor is also configured to detect whether a flame is generated in the gas stove if the switch knob is open.

3. The gas stove system according to claim 2, wherein The gas stove protection device further comprises a processor, which is electrically connected with the control chip; a plurality of pressure sensors, which are respectively arranged on the gas delivery pipeline and located between adjacent two electromagnetic valves and between the electromagnetic valve and the output of the gas delivery pipeline, and the pressure sensors are electrically connected with the processor; The pressure sensor is configured to detect the pressure value at the position of the gas delivery pipeline and transmit it to the processor if the switch knob is closed; The processor is configured to control the pressure sensor to work if the switch knob is closed, and judge the size of the pressure values detected by the plurality of pressure sensors, and send a third signal to the control chip if the pressure values detected by the plurality of pressure sensors are consistent; The control chip is also configured to control the gas stove to be unable to be ignited if the third signal is received.

4. The gas hob system according to claim 3, characterized in that The gas stove protection device further comprises: an alarm device, which is connected with the control chip; The control chip is also configured to control the alarm device to give a warning if the third signal is received.

5. The gas hob system according to claim 4, characterized in that The alarm device comprises a buzzer.

6. The gas stove system according to claim 1, wherein The control chip comprises a plurality of sub-control chips, which are connected with the plurality of electromagnetic valves one by one. The flame detection sensor is further electrically connected with the plurality of sub-control chips; The flame detection sensor is configured to detect whether a flame is generated in the gas stove, and send a first signal to the plurality of sub-control chips if a flame is detected in the gas stove, and send a second signal to the plurality of sub-control chips if no flame is detected in the gas stove; The sub-control chip is configured to control the connected solenoid valve to remain open if the first signal is received, and control the connected solenoid valve to close if the second signal is received.

7. The gas stove system according to claim 6, wherein The gas stove comprises a switch knob; The plurality of sub-control chips are further connected with the switch knob, and the sub-control chip is further configured to control the connected solenoid valve to open if the switch knob is open, and control the connected solenoid valve to close if the switch knob is closed.

8. The gas stove system according to any one of claims 2-5, wherein The control chip comprises a plurality of sub-control chips, and the plurality of sub-control chips are connected with the plurality of solenoid valves one by one; The flame detection sensor is further electrically connected with the plurality of sub-control chips; The flame detection sensor is configured to detect whether a flame is generated in the gas stove, and send a first signal to the plurality of sub-control chips if a flame is detected in the gas stove, and send a second signal to the plurality of sub-control chips if no flame is detected in the gas stove; The sub-control chip is configured to control the connected solenoid valve to remain open if the first signal is received, and control the connected solenoid valve to close if the second signal is received.

9. The gas stove system according to claim 8, wherein The plurality of sub-control chips are further connected with the switch knob, and the sub-control chip is further configured to control the connected solenoid valve to open if the switch knob is open, and control the connected solenoid valve to close if the switch knob is closed.

10. The gas hob system according to claim 6, characterized in that The gas stove protection device further comprises a plurality of watchdog circuits; The plurality of watchdog circuits are connected with the plurality of sub-control chips one by one, and the plurality of sub-control chips communicate with each other; The sub-control chip is configured to send a watchdog signal to the watchdog circuit after a preset time interval; The watchdog circuit is configured to send a reset signal to the sub-control chip if no watchdog signal is received after a preset time interval; If any of the sub-control chips receives a reset signal, the remaining sub-control chips control the connected solenoid valve to close.

11. The gas hob system according to claim 6, characterized in that If any of the sub-control chips fails to receive a communication reply from any other sub-control chip, the solenoid valve is controlled to close.

12. A gas hob system, characterized in that The gas stove system comprises a gas stove, a gas delivery pipeline and a gas stove protection device, an output port of the gas delivery pipeline is connected with the gas stove; The gas stove protection device comprises: A plurality of electromagnetic valves are sequentially arranged on the gas delivery pipeline; A control chip is connected with the plurality of electromagnetic valves; the control chip controls the plurality of electromagnetic valves to be closed in the case that the abnormal extinguishing signal of the gas stove is received.

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