Valve body detection circuit and gas appliance

Abstract

The invention particularly relates to the technical field of household appliances, in particular to a valve body detection circuit and a gas appliance, and the valve body detection circuit comprises a power supply assembly, a gas valve assembly, a functional assembly, a switch assembly and a control assembly. In the embodiment of the invention, the functional component has the capability of automatically disconnecting, and can directly cut off the loop when the working parameter exceeds the threshold value, so that physical protection is realized, the situation that the whole gas appliance is abnormal due to the abnormal working state of the functional component is avoided, and a user can maintain the gas appliance in time. Moreover, the control assembly can also detect the states of the functional assembly and the gas valve assembly at the same time, and actively controls the switch assembly to be switched off when parameters exceed threshold values, so that the gas cooker stops running, and software protection is formed. Therefore, physical protection and software protection are combined, the blind area of single protection of a traditional gas appliance at present is covered, and the safety risk caused by failure of a single assembly is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a valve body detection circuit and a gas appliance. BACKGROUND

[0002] In cold areas without central heating, such as rural areas in northern China, some families use gas heating equipment for heating. Gas heating stoves are a kind of gas heating equipment. Gas heating stoves generate heat by burning natural gas. Users can adjust the indoor temperature by operating the heating temperature of the gas heating stove. Compared with traditional kang stove heating, gas heating stoves have significant advantages.

[0003] However, some gas heating equipment currently sold on the market lacks the function of detecting and protecting the internal gas valve, which has certain safety hazards. SUMMARY

[0004] Therefore, the present application provides a valve body detection circuit and a gas appliance to solve the technical problem that some gas heating equipment lacks the function of detecting and protecting the internal gas valve in the prior art.

[0005] In a first aspect, the present application provides a valve body detection circuit, which comprises:

[0006] a power supply component having a first output end and a second output end;

[0007] a gas valve component connected with the first output end and the second output end;

[0008] a function component connected between the gas valve component and the first output end; the function component is used at least for detecting the working state of the gas valve component, and the function component is automatically disconnected when the first working parameter of the gas valve component exceeds the first threshold value;

[0009] a switch component connected in series between the gas valve component and the function component;

[0010] a control component connected with the function component, the gas valve component and the switch component; the control component is used for detecting the working state of the function component and the gas valve component, and the control component controls the switch component to be disconnected when the first working parameter exceeds the first threshold value or the second working parameter of the function component exceeds the second threshold value.

[0011] Beneficial effects: In this embodiment, the functional component has the ability to disconnect itself, which can directly cut off the circuit when the working parameter exceeds the threshold value, realize physical protection, avoid the abnormal working state of the functional component, and cause the overall gas appliance to be abnormal, so that the user can maintain the gas appliance in time. And the control component can also detect the state of the functional component and the gas valve component at the same time, and actively control the switch component to disconnect when the parameter exceeds the threshold value, so that the gas stove stops running, forming software protection. Therefore, the present embodiment can cover the blind area of the single protection of the traditional gas appliance by combining physical protection and software protection, and avoid the safety risk caused by the failure of a single component. Moreover, the present embodiment also improves the safety of the valve body detection circuit as a whole, ensures that the gas valve component can be reliably closed under abnormal working conditions, and reduces the risk of failure of the gas appliance.

[0012] In an alternative embodiment, the gas valve assembly comprises:

[0013] A first valve body for controlling the passage of gas; one end of the first valve body is connected with the switch component, and the other end of the first valve body is connected with the second output end;

[0014] A second valve body connected in parallel with the first valve body; the second valve body is used to adjust the amount of gas passing through; one end of the second valve body is connected with the switch component, and the other end of the second valve body is connected with the second output end.

[0015] Beneficial effects: In this embodiment, the first valve body is used for safety control of gas on-off, and the second valve body is used for gas quantity adjustment. Since the two are designed in parallel, only when the first valve body is powered on, the second valve body will be opened under the control of the switch component, avoiding safety hazards during adjustment.

[0016] In an alternative embodiment, the gas valve assembly further comprises:

[0017] A first air pressure switch arranged between the second valve body and the switch component;

[0018] A second air pressure switch arranged between the second valve body and the second output end;

[0019] When the fan of the gas appliance is started, the first air pressure switch and the second air pressure switch are closed;

[0020] When the fan of the gas appliance is not started, the first air pressure switch and the second air pressure switch are opened.

[0021] Beneficial effects: In this embodiment, the wind pressure switch is linked with the fan. When the gas appliance is not started, the fan does not run, and there is no wind pressure, so the wind pressure switch is in the off state, and the gas valve assembly cannot be powered on, thereby avoiding the situation of gas leakage when the gas appliance is not started. After the gas appliance is started, the fan is controlled to work normally, which can ensure that there is no excess gas and smoke in the gas appliance before combustion, thereby improving the safety of combustion. Moreover, the two wind pressure switches are arranged at the two ends of the second valve body, which can also avoid misjudgment caused by failure of a single switch.

[0022] In an alternative embodiment, the switch assembly comprises:

[0023] The first switch has one end connected with the function assembly and the other end connected with the first valve body;

[0024] The second switch has one end connected between the first switch and the first valve body and the other end connected with the second valve body;

[0025] And the first switch and the second switch are connected with the control assembly.

[0026] Beneficial effects: In this embodiment, the first switch and the second switch are independently controlled, and the control assembly can operate the on-off of the first valve body and the second valve body respectively. When the control assembly detects an abnormality, the first switch and the second switch can be simultaneously operated to be turned off, so that each first valve body and second valve body can be closed, thereby reducing the risk of overall failure caused by single failure of the switch assembly. Moreover, since the two are designed in parallel, only when the first switch is closed to make the first valve body powered on, the second switch will be closed to make the second valve body open, thereby avoiding safety hazards during adjustment.

[0027] In an alternative embodiment, the function assembly comprises:

[0028] The temperature limiter has one end connected with the first output end and the other end connected with the switch assembly; and the temperature limiter is connected with the control assembly;

[0029] The temperature limiter is used for the working temperature of the gas valve assembly, and when the working temperature of the gas valve assembly exceeds the preset threshold, the temperature limiter is automatically turned off.

[0030] Beneficial effects: In this embodiment, the temperature limiter is automatically turned off, which is physical protection without intervention of the control assembly, and has fast response speed, so that the power supply to the gas valve assembly can be immediately cut off when the temperature suddenly rises. At the same time, the temperature limiter is connected with the control assembly, so that the control assembly can monitor the state of the temperature limiter in real time, thereby forming a double response of physical protection and software protection, avoiding the situation that the temperature limiter fails without being found by the user, and preventing the gas appliance from being damaged or causing fire due to high temperature.

[0031] In an alternative embodiment, the functional assembly further comprises:

[0032] a wire controller arranged between the temperature limiter and the first output terminal; and the wire controller is connected with the control assembly;

[0033] The wire controller has a conduction state for supplying power to the gas valve assembly, and a disconnection state for stopping supplying power to the gas valve assembly.

[0034] Beneficial effects: In this embodiment, the wire controller serves as a human-computer interaction interface, which can receive user instructions such as heating requests, and is turned on after the user presses the specified start button, so that the power supply assembly supplies power to the gas valve assembly, ensuring that the gas valve is powered only when the user needs and the system is normal. And when the wire controller is in the disconnection state, the power supply assembly can actively stop supplying power, in cooperation with the detection of the control assembly, to avoid improper power supply when there is a misoperation or system anomaly, thereby improving the safety of the gas appliance.

[0035] In an alternative embodiment, the control assembly further comprises:

[0036] a control chip connected with the switch assembly, the gas valve assembly, and the functional assembly;

[0037] The control chip is provided with a first detection terminal, and the first detection terminal is arranged between the first switch of the switch assembly and the first valve body of the gas valve assembly.

[0038] Beneficial effects: In this embodiment, the first detection terminal directly monitors the working state of the first valve body, such as on-off and voltage state, and can detect abnormalities of the first valve body in real time. For example, when the switch assembly is closed, but the first detection terminal cannot detect the voltage state on the first valve body, it indicates that the first valve body is working abnormally and needs to be repaired. And when the first detection terminal detects abnormal parameters of the first valve body, the control chip can quickly obtain state information through the first detection terminal, and timely trigger the switch assembly to disconnect, thereby shortening the fault response time and ensuring the safety of the gas appliance.

[0039] In an alternative embodiment, the control assembly further comprises:

[0040] a first resistor, one end of the first resistor is connected between the wire controller and the temperature limiter, and the other end of the first resistor is connected with the second output terminal;

[0041] The control chip is provided with a second detection terminal, and the second detection terminal is arranged between the first resistor and the wire controller.

[0042] Beneficial effects: In the embodiment, the first resistor is connected with the wire control device, so that the second detection end can monitor the working state of the wire control device in real time through voltage change, and abnormal signals of the wire control device such as false triggering and poor contact can be accurately identified, thereby avoiding false power supply caused by wire control device failure, improving the accuracy of wire control device state detection, ensuring the accuracy of user instruction transmission, and preventing misoperation risk caused by wire control device abnormality.

[0043] In an alternative embodiment, the control assembly further comprises:

[0044] The second resistor has one end connected between the first air pressure switch and the second valve body, and the other end connected with the second output end;

[0045] The control chip is provided with a third detection end, which is arranged between the second resistor and the first air pressure switch.

[0046] Beneficial effects: In the embodiment, the second resistor is connected in series with the first air pressure switch and the second valve body, and the third detection end can monitor the on-off state of the air pressure switch and the working state of the second valve body at the same time. In this way, the third detection end can realize double monitoring, which simplifies the circuit while ensuring the coordination of air pressure and air volume adjustment and reducing the risk of abnormal combustion.

[0047] In an alternative embodiment, the control assembly further comprises:

[0048] The third resistor has one end connected between the temperature limiter and the first switch of the switch assembly, and the other end connected with the second output end;

[0049] The control chip is provided with a fourth detection end arranged between the temperature limiter and the first switch of the switch assembly.

[0050] Beneficial effects: In the embodiment, the third resistor is connected in series with the temperature limiter, and the on-off state of the temperature limiter can be monitored through the fourth detection end to supplement the feedback of the physical disconnection of the temperature limiter. Even if the physical disconnection is not triggered when the temperature limiter is abnormal, the control assembly can still detect the abnormality through the fourth detection end and trigger protection through disconnection of the wire control device or the switch assembly, which can further ensure the safety of the gas appliance.

[0051] In an alternative embodiment, the first switch is a single-pole double-throw switch, which is provided with a static end, a first moving end and a second moving end. The static end is connected with the temperature limiter, and the second moving end is connected with the first detection end and the first valve body.

[0052] The control assembly further comprises:

[0053] The fourth resistor has one end connected with the first output end.

[0054] a diode, an anode of the diode being connected to the other end of the fourth resistor, and a cathode of the diode being connected to the first moving terminal;

[0055] The control chip is provided with a fifth detection terminal, and the fifth detection terminal is arranged between the diode and the fourth resistor.

[0056] Beneficial effects: in the embodiment, since the single-pole double-throw switch has a switching state, whether the first switch successfully switches the state can be monitored through the fifth detection terminal. When the switching is successful, the fifth detection terminal detects the change of the voltage signal, so that the accurate monitoring of the switching state of the first switch is realized, the reliability of the switch control is ensured, and the abnormality of the valve body caused by the mis-switching of the switch is avoided.

[0057] In an alternative embodiment, the first switch is switched only by a pulse signal.

[0058] Beneficial effects: in the embodiment, since the first switch can be switched only by a pulse signal, when the control chip is dead, only a high level or a low level can be provided, and the pulse signal cannot be provided, so that the control chip cannot control the first switch to be turned on at this time, and the reliability of the switch control is further ensured, and the abnormality of the valve body caused by the mis-switching of the switch is avoided.

[0059] In a second aspect, the application provides a gas appliance, which comprises the valve body detection circuit as described in any one of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0061] Fig. 1 It is a whole structure schematic diagram of the valve body detection circuit in the embodiment of the present application;

[0062] Fig. 2 It is a whole working flowchart of the valve body detection circuit in the embodiment of the present application;

[0063] Fig. 3 It is a specific working flowchart of the valve body detection circuit in the embodiment of the present application.

[0064] Explanation of reference signs:

[0065] 10, power supply assembly; 11, first output terminal; 12, second output terminal;

[0066] 20, gas valve assembly; 21, first valve body; 22, second valve body; 23, first wind pressure switch; 24, second wind pressure switch;

[0067] 30, function assembly; 31, temperature limiter; 32, wire control;

[0068] 40, switch assembly; 41, first switch; 42, second switch;

[0069] 50, control assembly; 51, fifth detection terminal; 52, first detection terminal; 53, first resistor; 54, second detection terminal; 55, second resistor; 56, third detection terminal; 57, third resistor; 58, fourth detection terminal; 59, fourth resistor; M, control chip; D, diode. DETAILED DESCRIPTION

[0070] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0071] In the description of the present application, it should be noted that the terms "inner", "upper", "outer", "lower", "under" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0072] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "communication" should be understood broadly, for example, it can be fixed communication, or detachable communication, or integral communication; it can be mechanical communication, or electrical communication; it can be direct connection, or indirect connection through an intermediate medium; it can be internal communication of two elements, it can be wireless communication, or wired communication. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0073] In cold areas without central heating, such as rural areas in northern China, some families use gas heating equipment for heating. Gas heating stove is a kind of gas heating equipment. The gas heating stove generates heat by burning natural gas. Users can adjust the indoor temperature by operating the heating temperature of the gas heating stove. Compared with traditional kang stove heating, it has obvious advantages. However, at present, some gas heating equipment sold in the market lacks the function of detecting and protecting the internal gas valve, which has certain safety hazards.

[0074] Therefore, the valve body detection circuit and the gas appliance are provided to solve the technical problem that some gas heating equipment lacks the function of detecting and protecting the internal gas valve in the prior art.

[0075] The embodiments of the present application will be described below in combination with Figs. 1-3 .

[0076] As shown in Fig. 1 , according to the embodiments of the present application, on the one hand, the present application provides a valve body detection circuit, which comprises:

[0077] Specifically, in the present embodiment, the power supply component 10 has a first output end 11 and a second output end 12. The first output end 11 and the second output end 12 can be the positive and negative poles of the power supply component 10, respectively. Of course, the first output end 11 can be the positive pole or the negative pole, and the second output end 12 corresponds to the negative pole or the positive pole. As for the type of the power supply component 10, it can be an alternating current power supply or a direct current power supply. The present embodiment only exemplifies the type of the power supply component 10, but does not limit it. Those skilled in the art can change it according to the actual situation, as long as it can achieve the same technical effect.

[0078] Further, in the present embodiment, the gas valve component 20 is connected with the first output end 11 and the second output end 12, so that the gas valve component 20 and the power supply component 10 form a series circuit. For example, one end of the gas valve component 20 can be connected with the first output end 11, and the other end of the gas valve component 20 can be connected with the second output end 12.

[0079] Further, in the present embodiment, the functional component 30 is connected between the gas valve component 20 and the first output end 11. The functional component 30 is at least used for detecting the working state of the gas valve component 20, and the functional component 30 is automatically disconnected when the first working parameter of the gas valve component 20 exceeds the first threshold value. For example, the functional component 30 can be a voltage detection device, a current detection device or a temperature detection device provided with a switch. When the detected parameter exceeds the threshold value, the switch in the functional component 30 is automatically disconnected.

[0080] Of course, the embodiment only illustrates the type of the functional component 30, but does not limit it, and those skilled in the art can change it according to actual conditions, as long as the same technical effects can be achieved.

[0081] Further, in the embodiment, the switch component 40 is connected in series between the gas valve component 20 and the functional component 30, and the control component 50 is connected with the functional component 30, the gas valve component 20 and the switch component 40. In this way, the control component 50 can control the start and stop of the functional component 30, the gas valve component 20 and the switch component 40, and can also be used to detect the working state of the functional component 30 and the gas valve component 20. When the first working parameter exceeds the first threshold value, or the second working parameter of the functional component 30 exceeds the second threshold value, the control component 50 controls the switch component 40 to be disconnected. That is, as long as the control component 50 detects an abnormality, it will directly control the switch component 40 to be disconnected, so as to control the gas valve component 20 to be powered off.

[0082] In this way, in the embodiment, the functional component 30 has the ability to disconnect itself, can directly cut off the circuit when the working parameter exceeds the threshold value, realizes physical protection, avoids the abnormal working state of the functional component 30, causes the whole gas appliance to be abnormal, and can make the user maintain the gas appliance in time. Moreover, the control component 50 can also detect the state of the functional component 30 and the gas valve component 20, and actively control the switch component 40 to be disconnected when the parameter exceeds the threshold value, so as to make the gas appliance stop running, forming software protection. Therefore, the embodiment can cover the blind area of the single protection of the traditional gas appliance by combining physical protection and software protection, avoid the safety risk caused by the failure of a single component. Moreover, the embodiment also improves the safety of the whole valve detection circuit, ensures that the gas valve component 20 can be reliably closed under abnormal working conditions, and reduces the risk of failure of the gas appliance.

[0083] Further, in an alternative embodiment, the gas valve component 20 includes a first valve body 21 and a second valve body 22.

[0084] Specifically, in the embodiment, the first valve body 21 is a gas passage valve for controlling the passage of gas. One end of the first valve body 21 is connected with the switch component 40, and the other end of the first valve body 21 is connected with the second output end 12. Therefore, the on-off of the first valve body 21 is realized by the closing and opening of the switch component 40.

[0085] Further, in the embodiment, the second valve body 22 is in parallel connection with the first valve body 21 in the circuit, and the second valve body 22 is a gas proportional regulating valve for regulating the amount of gas passing through. One end of the second valve body 22 is connected with the switch component 40, and the other end of the second valve body 22 is connected with the second output end 12.

[0086] In the actual gas passage, along the flow direction of the gas, the first valve body 21 is upstream of the second valve body 22, that is, only the first valve body 21 is conductive, and then the second valve body 22 can adjust the flow of the gas. If the first valve body 21 is not conductive, the gas will not be introduced into the gas appliance for combustion.

[0087] In this embodiment, the first valve body 21 is used for safety control of gas on-off, and the second valve body 22 is used for gas volume adjustment. Since the two are designed in parallel, only when the first valve body 21 is powered on, the second valve body 22 will be opened under the control of the switch assembly 40, avoiding safety hazards during adjustment.

[0088] Further, in an alternative embodiment, the gas valve assembly 20 further comprises a first wind pressure switch 23 and a second wind pressure switch 24.

[0089] Specifically, in this embodiment, the first wind pressure switch 23 is arranged between the second valve body 22 and the switch assembly 40, and the second wind pressure switch 24 is arranged between the second valve body 22 and the second output end 12. When the fan of the gas appliance is started, the first wind pressure switch 23 and the second wind pressure switch 24 are closed; when the fan of the gas appliance is not started, the first wind pressure switch 23 and the second wind pressure switch 24 are opened.

[0090] In actual operation, when the gas appliance is started and the internal natural gas is combusted, the fan is needed to provide oxygen and blow away the smoke generated by combustion. If the fan does not work or the wind pressure generated by the fan is insufficient, it may cause gas leakage. Therefore, when the gas appliance is started for combustion, the fan of the gas appliance rotates, and the wind pressure generated during rotation can close the pressure switch. When the fan wind pressure cannot close the pressure switch, the first valve body 21 and the second valve body 22 cannot be powered on, so they cannot be opened.

[0091] And when the fan of the gas appliance rotates normally, the wind pressure generated during rotation can close the pressure switch, so that the first valve body 21 and the second valve body 22 are in the powered-on state, ensuring normal supply of gas.

[0092] In this way, in this embodiment, the wind pressure switch is linked with the fan. When the gas appliance is not started, the fan does not run, and there is naturally no wind pressure, so the wind pressure switch is in the open state, and the gas valve assembly 20 cannot be powered on and opened, thereby avoiding the situation of gas leakage when the gas appliance is not started. After the gas appliance is started, the fan is controlled to work normally, which can ensure that there is no excess gas and smoke in the gas appliance before combustion, thereby improving the safety of combustion. Moreover, the two wind pressure switches are arranged at the two ends of the second valve body 22, which can also avoid misjudgment caused by failure of a single switch.

[0093] Further, in an optional embodiment, the switch assembly 40 comprises a first switch 41 and a second switch 42.

[0094] Specifically, in the present embodiment, one end of the first switch 41 is connected with the function assembly 30, and the other end of the first switch 41 is connected with the first valve body 21. One end of the second switch 42 is connected between the first switch 41 and the first valve body 21, and the other end of the second switch 42 is connected with the second valve body 22. Both the first switch 41 and the second switch 42 are connected with the control assembly 50.

[0095] In actual work process, the control assembly 50 can control the on-off of the first switch 41 and the second switch 42 according to actual situation. If the control assembly 50 detects that there is an abnormality in the function assembly 30 or somewhere of the gas valve assembly 20, the control assembly 50 can directly control the first switch 41 and the second switch 42 to be disconnected, or only control the first switch 41 to be disconnected.

[0096] In this way, in the present embodiment, the first switch 41 and the second switch 42 are independently controlled, and the control assembly 50 can respectively operate the on-off of the first valve body 21 and the on-off of the second valve body 22. When the control assembly 50 detects an abnormality, the first switch 41 and the second switch 42 can be simultaneously operated to be disconnected, so as to ensure that each of the first valve body 21 and the second valve body 22 can be closed, thereby reducing the risk of overall failure caused by single failure of the switch assembly 40. Moreover, since the first switch 41 and the second switch 42 are designed in parallel, only when the first switch 41 is closed to make the first valve body 21 be powered, the second switch 42 will be closed to make the second valve body 22 be opened, so as to avoid safety hazards in the adjustment process.

[0097] Further, in an optional embodiment, the function assembly 30 comprises a temperature limiter 31.

[0098] Specifically, in the present embodiment, one end of the temperature limiter 31 is connected with the first output end 11, and the other end of the temperature limiter 31 is connected with the switch assembly 40. The temperature limiter 31 is connected with the control assembly 50. The temperature limiter 31 is used for the working temperature of the gas valve assembly 20, and when the working temperature of the gas valve assembly 20 exceeds a preset threshold, the temperature limiter 31 is disconnected.

[0099] Of course, the preset threshold of the temperature limiter 31 can be changed by those skilled in the art according to actual situation, and the present embodiment does not limit this, as long as the same technical effects can be achieved.

[0100] In this embodiment, the temperature limiter 31 is physically disconnected, without intervention of the control assembly 50, and responds quickly to immediately cut off the power supply to the gas valve assembly 20 when the temperature rises suddenly. At the same time, the temperature limiter 31 is connected to the control assembly 50, so that the control assembly 50 can monitor the state of the temperature limiter 31 in real time, thereby forming a double response of physical protection and software protection, avoiding the failure of the temperature limiter 31 being not found by the user, and preventing the gas appliance from being damaged or causing a fire due to high temperature.

[0101] Further, in an optional embodiment, the functional assembly 30 further comprises a wire controller 32, which is arranged between the temperature limiter 31 and the first output end 11, and the wire controller 32 is connected to the control assembly 50.

[0102] Specifically, in this embodiment, the wire controller 32 has a conduction state for supplying power to the gas valve assembly 20, and a disconnected state for stopping supplying power to the gas valve assembly 20. Of course, the control assembly 50 can detect the actual working state of the wire controller 32, and when an abnormality is detected, the control assembly 50 can also control the wire controller 32 to switch to the disconnected state.

[0103] In this embodiment, the wire controller 32 serves as a human-computer interaction interface and can receive user instructions such as heating requests, and is turned on after the user presses a specified start button, so that the power supply assembly 10 supplies power to the gas valve assembly 20, ensuring that the gas valve is powered only when the user needs it and the system is normal. And when the wire controller 32 is in the disconnected state, the power supply assembly 10 can actively stop supplying power, in cooperation with the detection of the control assembly 50, to avoid improper power supply when there is a misoperation or system abnormality, thereby improving the safety of the gas appliance.

[0104] Further, in an optional embodiment, the control assembly 50 further comprises a control chip M, which is connected to the switch assembly 40, the gas valve assembly 20, and the functional assembly 30. And the control chip M is provided with a first detection end 52, which is arranged between the first switch 41 of the switch assembly 40 and the first valve body 21 of the gas valve assembly 20.

[0105] In this embodiment, the first detection end 52 directly monitors the working state of the first valve body 21, such as on-off and voltage state, and can detect abnormalities of the first valve body 21 in real time. For example, when the switch assembly 40 is closed, but the first detection end 52 cannot detect the voltage state on the first valve body 21, it indicates that the first valve body 21 is working abnormally and needs to be repaired. And when the first detection end 52 detects abnormal parameters of the first valve body 21, the control chip M can quickly obtain state information through the first detection end 52, and timely trigger the switch assembly 40 to be disconnected, thereby shortening the fault response time and ensuring the safety of the gas appliance.

[0106] Further, in an alternative embodiment, the control assembly 50 further comprises a first resistor 53, one end of the first resistor 53 is connected between the line controller 32 and the temperature limiter 31, and the other end of the first resistor 53 is connected with the second output end 12. The control chip M is provided with a second detection end 54, which is arranged between the first resistor 53 and the line controller 32.

[0107] In this way, in the present embodiment, the first resistor 53 is connected with the line controller 32, so that the second detection end 54 can monitor the working state of the line controller 32 in real time through voltage change, and accurately identify abnormal signals of the line controller 32, such as false triggering and poor contact, thereby avoiding false power supply caused by line controller 32 failure, and improving the accuracy of line controller 32 state detection, ensuring the accuracy of user instruction transmission, and preventing misoperation risk caused by line controller 32 abnormality.

[0108] Further, in an alternative embodiment, the control assembly 50 further comprises a second resistor 55, one end of the second resistor 55 is connected between the first air pressure switch 23 and the second valve body 22, and the other end of the second resistor 55 is connected with the second output end 12. The control chip M is provided with a third detection end 56, which is arranged between the second resistor 55 and the first air pressure switch 23.

[0109] In this way, in the present embodiment, the second resistor 55 is connected in series with the first air pressure switch 23 and the second valve body 22, and the third detection end 56 can monitor the on-off state of the air pressure switch and the working state of the second valve body 22 at the same time, so that the third detection end 56 can realize double monitoring, which can simplify the circuit, and at the same time, when the air pressure is insufficient, the third detection end 56 can immediately find and stop the second valve body 22 adjustment, thereby ensuring the synergy of air pressure and air volume adjustment, and reducing the risk of abnormal combustion.

[0110] Further, in an alternative embodiment, the control assembly 50 further comprises a third resistor 57, one end of the third resistor 57 is connected between the temperature limiter 31 and the first switch 41 of the switch assembly 40, and the other end of the third resistor 57 is connected with the second output end 12. The control chip M is provided with a fourth detection end 58, which is arranged between the temperature limiter 31 and the first switch 41 of the switch assembly 40.

[0111] In this way, in the present embodiment, the third resistor 57 is connected in series with the temperature limiter 31, and the on-off state of the temperature limiter 31 can be monitored through the fourth detection end 58, thereby supplementing the feedback of the physical disconnection of the temperature limiter 31. Even if the physical disconnection is not triggered when the temperature limiter 31 is abnormal, the control assembly 50 can still find the abnormality through the fourth detection end 58, and trigger protection through the line controller 32 or the disconnection of the switch assembly 40, thereby further ensuring the safety of the gas appliance.

[0112] Further, in an alternative embodiment, the first switch 41 is a single-pole double-throw switch, and the first switch 41 is provided with a static terminal, a first moving terminal and a second moving terminal, the static terminal is connected with the temperature limiter 31, and the second moving terminal is connected with the first detection terminal 52 and the first valve body 21.

[0113] Further, in the present embodiment, the control assembly 50 further comprises a fourth resistor 59 and a diode D, one end of the fourth resistor 59 is connected with the first output terminal 11, the anode of the diode D is connected with the other end of the fourth resistor 59, and the cathode of the diode D is connected with the first moving terminal.

[0114] In addition, the control chip M is provided with a fifth detection terminal 51, and the fifth detection terminal 51 is arranged between the diode D and the fourth resistor 59.

[0115] In this way, in the present embodiment, since the single-pole double-throw switch has a switching state, whether the first switch 41 successfully switches the state can be monitored through the fifth detection terminal 51. When the switching is successful, the fifth detection terminal 51 detects the change of the voltage signal, so as to realize accurate monitoring of the switching state of the first switch 41, ensure the reliability of the switch control, and avoid abnormal valve body caused by the switch mis-switching.

[0116] Further, in an alternative embodiment, the first switch 41 is switched only by the pulse signal.

[0117] In this way, in the present embodiment, since the first switch 41 can be switched only by the pulse signal, when the control chip M is dead, only high level or low level can be provided, and the pulse signal cannot be provided, so that the control chip M cannot control the first switch 41 to be turned on at this time, thereby further ensuring the reliability of the switch control, and avoiding abnormal valve body caused by the switch mis-switching.

[0118] In a second aspect, the present application provides a gas appliance, which comprises the valve body detection circuit according to any one of the above embodiments.

[0119] The working process of the present scheme is as follows:

[0120] Before the online controller 32 is turned on, the control assembly 50 switches the first switch 41 to connect the static terminal with the first moving terminal. At this time, the first output terminal 11, the fourth resistor 59, the diode D, the third resistor 57 and the second output terminal 12 form a loop, so that the control assembly 50 detects the voltage division of the third resistor 57 through the fourth detection terminal and the fifth detection terminal.

[0121] After the user presses the start button on the online controller 32, the online controller 32 is turned on, so that the power supply assembly 10 supplies power to the gas appliance and the valve body detection circuit.

[0122] After the on-line controller 32 is turned on, the fan of the gas appliance is started, and the two wind pressure switches are closed. Moreover, the control assembly 50 can detect the state of the on-line controller 32 at the second detection point. Then, the temperature limiter 31 can be detected at the fourth detection point. Since the on-line controller 32 is turned on, and the second detection point detects normally.

[0123] After the on-line controller 32 is turned on, due to the one-way conduction performance of the diode D, a loop is formed from the first output terminal 11, the on-line controller 32, the temperature limiter 31, the third resistor 57 to the second output terminal 12, so that the voltage division of the third resistor 57 changes.

[0124] Then, the control assembly 50 switches the first switch 41 to connect the static terminal to the second dynamic terminal, the fifth detection terminal 51 detects a high level, and the control assembly 50 completes the detection through the detection information of the fifth detection terminal 51. At this time, the first valve body 21 is powered.

[0125] After the first valve body 21 is powered, the control assembly 50 closes the second switch 42, so that the second valve body 22 is powered. Moreover, the state of the first valve body 21 can be detected through the first detection point, and the state of the first wind pressure switch 23 and the second valve body 22 can be detected through the third detection point.

[0126] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A valve body detection circuit, characterized in that, include: The power supply assembly (10) has a first output terminal (11) and a second output terminal (12); The gas valve assembly (20) is connected to the first output terminal (11) and the second output terminal (12); A functional component (30) is connected between the gas valve assembly (20) and the first output terminal (11); the functional component (30) is at least used to detect the working state of the gas valve assembly (20), and the functional component (30) disconnects automatically when the first working parameter of the gas valve assembly (20) exceeds the first threshold. A switch assembly (40) is connected in series between the gas valve assembly (20) and the functional assembly (30); The control component (50) is connected to the functional component (30), the gas valve assembly (20), and the switch assembly (40). The control component (50) is used to detect the working status of the functional component (30) and the gas valve assembly (20), and to control the switch assembly (40) to disconnect when the first working parameter exceeds the first threshold or when the second working parameter of the functional component (30) exceeds the second threshold.

2. The valve body detection circuit according to claim 1, characterized in that, The gas valve assembly (20) includes: A first valve body (21) is used to control the passage of gas; one end of the first valve body (21) is connected to the switch assembly (40), and the other end of the first valve body (21) is connected to the second output terminal (12); The second valve body (22) is connected in parallel with the first valve body (21); the second valve body (22) is used to regulate the amount of gas passing through; one end of the second valve body (22) is connected to the switch assembly (40), and the other end of the second valve body (22) is connected to the second output terminal (12).

3. The valve body detection circuit according to claim 2, characterized in that, The gas valve assembly (20) also includes: A first air pressure switch (23) is disposed between the second valve body (22) and the switch assembly (40); The second air pressure switch (24) is located between the second valve body (22) and the second output terminal (12); When the fan of the gas appliance is started, the first air pressure switch (23) and the second air pressure switch (24) are closed; When the gas appliance fan is not started, the first air pressure switch (23) and the second air pressure switch (24) are disconnected.

4. The valve body detection circuit according to claim 2 or 3, characterized in that, The switching assembly (40) includes: A first switch (41) is connected at one end to the functional component (30) and at the other end to the first valve body (21). The second switch (42) has one end connected between the first switch (41) and the first valve body (21), and the other end connected to the second valve body (22). Both the first switch (41) and the second switch (42) are connected to the control component (50).

5. The valve body detection circuit according to any one of claims 1 to 3, characterized in that, The functional component (30) includes: A temperature limiter (31) is provided, one end of which is connected to the first output terminal (11), and the other end of which is connected to the switch assembly (40); and the temperature limiter (31) is connected to the control assembly (50). The temperature limiter (31) is used to control the operating temperature of the gas valve assembly (20). When the operating temperature of the gas valve assembly (20) exceeds a preset threshold, the temperature limiter (31) automatically disconnects.

6. The valve body detection circuit according to claim 5, characterized in that, The functional component (30) also includes: A wired controller (32) is disposed between the temperature limiter (31) and the first output terminal (11); and the wired controller (32) is connected to the control component (50); Under the driving action of the control component (50), the wired controller (32) has an energized state that supplies power to the gas valve assembly (20) and an unenergized state that stops supplying power to the gas valve assembly (20).

7. The valve body detection circuit according to claim 6, characterized in that, The control component (50) includes: The control chip (M) is connected to the switch assembly (40), the gas valve assembly (20), and the functional component (30); Furthermore, the control chip (M) is provided with a first detection terminal (52), which is located between the first switch (41) of the switch assembly (40) and the first valve body (21) of the gas valve assembly (20).

8. The valve body detection circuit according to claim 7, characterized in that, The control component (50) further includes: A first resistor (53) is connected at one end between the wired controller (32) and the temperature limiter (31), and at the other end of the first resistor (53) is connected to the second output terminal (12). The control chip (M) is provided with a second detection terminal (54), which is located between the first resistor (53) and the wired controller (32).

9. The valve body detection circuit according to claim 8, characterized in that, The control component (50) further includes: The second resistor (55) has one end connected between the first wind pressure switch (23) and the second valve body (22), and the other end connected to the second output terminal (12). The control chip (M) is provided with a third detection terminal (56), which is located between the second resistor (55) and the first wind pressure switch (23).

10. The valve body detection circuit according to claim 9, characterized in that, The control component (50) further includes: The third resistor (57) has one end connected between the temperature limiter (31) and the first switch (41) of the switch assembly (40), and the other end connected to the second output terminal (12). The control chip (M) is provided with a fourth detection terminal (58), which is located between the temperature limiter (31) and the first switch (41) of the switch assembly (40).

11. The valve body detection circuit according to claim 10, characterized in that, The first switch (41) is a single-pole double-throw switch. The first switch (41) is provided with a stationary end, a first moving end and a second moving end. The stationary end is connected to the temperature limiter (31), and the second moving end is connected to the first detection end (52) and the first valve body (21). The control component (50) further includes: A fourth resistor (59), one end of which is connected to the first output terminal (11); A diode (D), wherein the anode of the diode (D) is connected to the other end of the fourth resistor (59), and the cathode of the diode (D) is connected to the first moving end; The control chip (M) is provided with a fifth detection terminal (51), which is located between the diode (D) and the fourth resistor (59).

12. The valve body detection circuit according to claim 11, characterized in that, The first switch (41) is switched only by pulse signals.

13. A gas appliance, characterized in that, include: The valve body detection circuit as described in any one of claims 1 to 12.

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