Fire detection device of gas water heater, gas water heater and fire detection control method

Abstract

The application discloses a fire detection device of a gas water heater, the gas water heater and a fire detection control method, and belongs to the field of the gas water heater. The fire detection device of the gas water heater comprises a fire detection needle main body and a mounting main body. One end of the fire detection needle main body is fixed in the mounting main body, and the mounting main body is used for fixing the fire detection needle main body in the gas water heater. A fireproof layer is arranged on the fire detection needle main body, the fireproof layer covers at least part of the surface of the fire detection needle main body, the part of the surface of the fire detection needle main body not covered by the fireproof layer is used for flame combustion, and the flame is detected.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of gas water heaters, and particularly relates to a fire detection device of a gas water heater, the gas water heater and a fire detection control method. BACKGROUND

[0002] With the development of science and technology, a gas water heater has become a commonly used article in daily life, which makes people's life more convenient. Usually, a fire detection needle is arranged in the gas water heater, the fire detection needle is a core component of a combustion control system of the gas water heater, a fire detection end of the fire detection needle is arranged above a combustion single piece of the gas water heater, and the fire detection needle is electrically connected with a controller of the gas water heater. When the gas water heater is ignited and heated, the flame will burn the fire detection needle, and because of the conductivity of ions in the flame, an overall electric signal path is formed, so that the combustion flame is effectively monitored. Through monitoring of the flame signal, successful ignition of the gas water heater, accidental flameout in the middle of heating and end of heating and other working or fault states are identified, and safety protection is performed. However, in the related art, the fire detection needle is prone to deformation, which affects the fire detection function of the fire detection needle, and even causes the fire detection function of the fire detection needle to fail. SUMMARY

[0003] The purpose of the embodiments of the application is to provide a fire detection device of a gas water heater, the gas water heater and a fire detection control method, and at least solve the problem that the fire detection needle is prone to deformation, which affects the fire detection function of the fire detection needle, and even causes the fire detection function of the fire detection needle to fail.

[0004] In a first aspect, the embodiments of the application provide a fire detection device of a gas water heater, the fire detection device of the gas water heater comprising: a fire detection needle body and a mounting body.

[0005] One end of the fire detection needle body is fixed in the mounting body, and the mounting body is used for fixing the fire detection needle body in the gas water heater.

[0006] A fireproof layer is arranged on the fire detection needle body, the fireproof layer covers at least part of a surface of the fire detection needle body, and the part of the surface of the fire detection needle body not covered by the fireproof layer is used for flame burning and detecting the flame.

[0007] Optionally, along a circumferential direction of the fire detection needle body, a circumference of the fireproof layer is greater than or equal to one half of a circumference of the fire detection needle body, and the circumference of the fireproof layer is less than the circumference of the fire detection needle body.

[0008] Optionally, along an axial direction of the fire detection needle body, a length of the fireproof layer is less than or equal to a length of the fire detection needle body, and the length of the fire detection needle body is a distance from one end of the fire detection needle body away from the mounting body to the mounting body.

[0009] Optionally, the fireproof layer is in contact with the mounting body, and a distance between the fireproof layer and an end of the fire detecting needle body away from the mounting body is L, satisfying 5mm≤L≤10mm.

[0010] Optionally, a thickness of the fireproof layer ranges from 0.5mm to 2mm.

[0011] Optionally, the fire detecting device of the gas water heater further comprises a first connecting line.

[0012] A first end of the first connecting line is located in the mounting body and connected with the fire detecting needle body, and the first connecting line is used for transmitting the flame ion current signal.

[0013] Optionally, the fire detecting device of the gas water heater further comprises a second connecting line.

[0014] A first end of the second connecting line is located in the mounting body and connected with the fire detecting needle body, and the second connecting line is used for transmitting the resistance value of the fire detecting needle body.

[0015] Optionally, the fire detecting device of the gas water heater further comprises a connecting terminal.

[0016] The first connecting line and the second connecting line are both connected with the connecting terminal, and the connecting terminal is used for connecting a controller of the gas water heater.

[0017] In a second aspect, the embodiments of the present application provide a gas water heater, comprising a burner shell, a combustion single piece, and the fire detecting device of the gas water heater according to any one of the first aspect.

[0018] The combustion single piece is arranged in the burner shell, the mounting body is arranged in the burner shell, and the fire detecting needle body is located in the burner shell, the fire detecting needle body is opposite to the combustion single piece, and a surface of the fire detecting needle body not covered by the fireproof layer faces the combustion single piece.

[0019] Optionally, the gas water heater further comprises an ignition needle.

[0020] The ignition needle is arranged in the burner shell, and the ignition needle is used for ignition.

[0021] In a third aspect, the embodiments of the present application provide a fire detecting control method, applied to the gas water heater according to any one of the second aspect, the gas water heater having a first detection mode and a second detection mode, the first detection mode being a flame ion current fire detecting mode, and the second detection mode being a temperature monitoring fire detecting mode; the fire detecting control method comprising:

[0022] determine whether the first detection mode is normal;

[0023] in the case that the first detection mode is not normal, control the gas water heater to switch from the first detection mode to the second detection mode;

[0024] monitor the resistance value of the flame detector body, and determine whether the gas water heater has flame according to the resistance value of the flame detector body.

[0025] Optionally, the determining whether the gas water heater has flame according to the resistance value of the flame detector body comprises:

[0026] converting the resistance value of the flame detector body into a temperature value;

[0027] determining whether the temperature value is greater than a preset temperature threshold;

[0028] in the case that the temperature value is greater than or equal to the preset temperature threshold, determining that the gas water heater has flame; and in the case that the temperature value is less than the preset temperature threshold, determining that the gas water heater has no flame.

[0029] Optionally, the determining whether the first detection mode is normal comprises:

[0030] detecting a current value transmitted from the flame detector body;

[0031] if the current value is within a preset current range, determining that the first detection mode is normal; and if the current value is not within the preset current range, determining that the first detection mode is not normal.

[0032] In a fourth aspect, an electronic device is provided, which includes a processor and a memory, the memory storing programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the flame detection control method according to the third aspect.

[0033] In a fifth aspect, a readable storage medium is provided, which stores programs or instructions, and the programs or instructions, when executed by a processor, implement the steps of the flame detection control method according to the third aspect.

[0034] In a sixth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor being coupled, and the processor being configured to execute programs or instructions to implement the flame detection control method according to the third aspect.

[0035] In a seventh aspect, embodiments of this application provide a computer program product stored in a storage medium, which is executed by at least one processor to implement the flame detection control method as described in the third aspect.

[0036] In this embodiment, since one end of the flame detection needle body is fixed in the mounting body, when installing the flame detection needle body in the gas water heater, it can be installed in the gas water heater through the mounting body, and the mounting body can fix the flame detection needle body in the gas water heater. Because the flame detection needle body is provided with a fireproof layer covering at least a portion of its surface, once the flame detection needle body is installed in the gas water heater, the flame in the gas water heater can scorch the surface of the flame detection needle body not covered by the fireproof layer, thereby enabling the flame detection needle body to detect flames. Furthermore, the presence of the fireproof layer can fix the flame detection needle body, preventing the flame detection needle body from deforming due to long-term exposure to flames. In other words, in this embodiment, by providing a fireproof layer on the flame detection needle body, and the fireproof layer covering at least a portion of the surface of the flame detection needle body, after the flame detection needle body is applied to a gas water heater, the surface of the flame detection needle body not covered by the fireproof layer can be burned by a flame. This ensures that the flame detection needle body can have a flame detection function, and the fireproof layer ensures that the flame detection needle body always maintains its initial state, avoiding the problem that the flame detection needle body is easily deformed after being burned, which would affect the flame detection function of the flame detection needle body, and thus avoid the problem of the flame detection function of the flame detection needle body failing. That is, in this embodiment, it can be effectively ensured that the flame detection needle body is not easily deformed, thereby improving the flame detection performance of the flame detection needle body. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of one of the flame detection devices for a gas water heater provided in an embodiment of this application;

[0038] Figure 2 This is a second schematic diagram illustrating a flame detection device for a gas water heater provided in an embodiment of this application.

[0039] Figure 3 This is the third schematic diagram of a flame detection device for a gas water heater provided in this application embodiment;

[0040] Figure 4 This is the fourth schematic diagram of a flame detection device for a gas water heater provided in this application embodiment;

[0041] Figure 5 This is the fifth schematic diagram of a flame detection device for a gas water heater provided in this application embodiment;

[0042] Figure 6 express Figure 5 Cross-sectional view at point P1-P1;

[0043] Figure 7 Fig. 6 is a schematic diagram of a fire detection device of a gas water heater according to an embodiment of the present application;

[0044] Figure 8 Fig. 7 is a schematic diagram of a fire detection device of a gas water heater according to an embodiment of the present application;

[0045] Figure 9 Fig. 1 is a schematic diagram of a gas water heater according to an embodiment of the present application;

[0046] Figure 10 Fig. 2 is a schematic diagram of a gas water heater according to an embodiment of the present application;

[0047] Figure 11 Fig. 11 is a flow chart of a fire detection control method according to an embodiment of the present application;

[0048] Figure 12 Fig. 12 is a schematic diagram of an electronic device according to an embodiment of the present application;

[0049] Figure 13 Fig. 13 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application;

[0050] Reference Signs:

[0051] 10: fire detection needle body; 101: first diameter; 102: second diameter; 20: mounting body; 30: fireproof layer; 40: first connecting line; 50: second connecting line; 60: connecting terminal; 100: burner shell; 200: combustion single piece; 300: ignition needle; 400: fire detection needle fixing piece; 500: ignition fixing piece. DETAILED DESCRIPTION

[0052] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0053] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] Before explaining the fire detection device of the gas water heater provided by the embodiments of the present application, the application scenario of the fire detection device of the gas water heater provided by the embodiments of the present application is described in detail: in the related art, a fire detection needle is arranged in the gas water heater, the fire detection end of the fire detection needle is arranged above the combustion single piece of the gas water heater, and the fire detection needle is electrically connected with the controller of the gas water heater. When the gas water heater is ignited and heated, the flame will burn the fire detection needle, and because the flame ions have conductivity, an overall electric signal path will be formed, so that the combustion flame is effectively monitored. Through monitoring the flame signal, the successful ignition, accidental flameout in the middle of heating and end of heating of the gas water heater and other working or fault states are identified, and safety protection is performed. However, the fire detection needle is usually made of metal alloy such as iron, aluminum and nickel, and after being burned by the flame for a long time, the fire detection needle will be deformed due to its own gravity, and then the fire detection function of the fire detection needle will be affected. When the fire detection needle is severely deformed, the fire detection function of the fire detection needle will even fail.

[0056] As shown in FIG. 1, the fire detection device of the gas water heater includes a fire detection needle body 10 and a mounting body 20. Figures 1 to 10 One end of the fire detection needle body 10 is fixed in the mounting body 20, and the mounting body 20 is used to fix the fire detection needle body 10 in the gas water heater; a fireproof layer 30 is arranged on the fire detection needle body 10, the fireproof layer 30 covers at least part of the surface of the fire detection needle body 10, and the part of the surface of the fire detection needle body 10 not covered by the fireproof layer 30 is used for flame burning and detecting the flame.

[0057] ​

[0058] In the embodiment of the present application, since one end of the fire detecting needle body 10 is fixed in the mounting body 20, when the fire detecting needle body 10 is installed in the gas water heater, the mounting body 20 can be used to install the fire detecting needle body 10 in the gas water heater, and the mounting body 20 can fix the fire detecting needle body 10 in the gas water heater. Since the fireproof layer 30 is arranged on the fire detecting needle body 10 and covers at least part of the surface of the fire detecting needle body 10, once the fire detecting needle body 10 is installed in the gas water heater, the flame in the gas water heater can burn the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30, so that the fire detecting needle body 10 can detect the fire, and the presence of the fireproof layer 30 can fix the fire detecting needle body 10 and avoid the problem of deformation of the fire detecting needle body 10 caused by long-term burning by the flame. That is, in the embodiment of the present application, by arranging the fireproof layer 30 on the fire detecting needle body 10 and covering at least part of the surface of the fire detecting needle body 10, after the fire detecting needle body 10 is applied in the gas water heater, the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30 can be burned by the flame, so as to ensure that the fire detecting needle body 10 has the function of detecting the fire, and the fireproof layer 30 can ensure that the fire detecting needle body 10 always remains in the initial state, avoiding the problem that the fire detecting needle body 10 is easily deformed after being burned, which affects the function of detecting the fire of the fire detecting needle body 10, and further avoids the problem that the function of detecting the fire of the fire detecting needle body 10 is invalid. That is, in the embodiment of the present application, the fire detecting needle body 10 can be effectively prevented from being deformed, and the performance of detecting the fire of the fire detecting needle body 10 is improved.

[0059] It should be noted that, in the embodiment of the present application, the fireproof layer 30 can be formed of ceramic, that is, the fireproof layer 30 is a ceramic layer, wherein the ceramic has good stability and good high-temperature resistance, so that the ceramic is not easily deformed by heat, and thus when the fireproof layer 30 is a ceramic layer, the ceramic layer can effectively protect the fire detecting needle body 10 and ensure that the fire detecting needle body 10 is not easily deformed by heat. Of course, the fireproof layer 30 can also be formed of other high-temperature resistant materials, for example, the fireproof layer 30 is formed of carbon composite refractory material, which is a kind of multi-phase composite refractory material made of two or more refractory oxides (MgO, CaO, Al2O3, ZrO2, etc.) and carbon materials and non-oxide materials as raw materials, and carbon materials as a binder, and for another example, the fireproof layer 30 is formed of dolomite refractory material, which is an alkaline refractory material formed of dolomite as the main raw material and MgO and CaO as the main components, wherein the mass fraction of CaO is 40% to 60%, and the mass fraction of magnesium oxide is 30% to 40%. The specific material of the fireproof layer 30 is not limited in the embodiment of the present application.

[0060] In addition, in the embodiment of the present application, the material of the fire detecting needle body 10 can be iron, aluminum, nickel or other metal alloy.

[0061] In addition, in the embodiment of the present application, the material of the mounting body 20 can be formed of ceramic, i.e., the mounting body 20 is a ceramic body, so that the mounting body 20 also has good stability and high temperature resistance, so that when the fire detecting needle body 10 is burned by the flame, even if the heat is transmitted from the fire detecting needle body 10 to the mounting body 20, the mounting body 20 is not easy to be deformed by heat, so as to ensure that the mounting body 20 can continuously and stably fix the fire detecting needle body 10 in the gas water heater. Of course, the material of the mounting body 20 can also be other high-temperature-resistant materials, for example, the mounting body 20 is formed of carbon composite refractory material, which is a kind of multi-phase composite refractory material made of two or more refractory oxides (MgO, CaO, Al2O3, ZrO2, etc.) and carbon materials and non-oxide materials as raw materials, and carbon materials as a binder, and for another example, the mounting body 20 is formed of dolomite refractory material, which is an alkaline refractory material formed of dolomite as the main raw material and MgO and CaO as the main components, wherein the mass fraction of CaO is 40% to 60%, and the mass fraction of magnesium oxide is 30% to 40%. The specific material of the mounting body 20 is not limited in the embodiment of the present application.

[0062] In addition, in the embodiment of the present application, the shape of the mounting body 20 can be set according to actual needs, for example, the shape of the mounting body 20 is a quadrangular body, and for another example, the shape of the mounting body 20 is a cylindrical body. The shape of the mounting body 20 is not limited in the embodiment of the present application.

[0063] In addition, in the embodiment of the present application, the fireproof layer 30 can be connected with the mounting body 20, so as to ensure that at the connection between the fire detecting needle body 10 and the mounting body 20, the fireproof layer 30 can still play a protective role on the fire detecting needle body 10, so as to ensure that the fire detecting needle body 10 is not easy to be deformed at the connection.

[0064] In addition, in some embodiments, along the circumferential direction of the fire detecting needle body 10, the circumference of the fireproof layer 30 is greater than or equal to one half of the circumference of the fire detecting needle body 10, and the circumference of the fireproof layer 30 is less than the circumference of the fire detecting needle body 10.

[0065] Since the perimeter of the fireproof layer 30 is greater than or equal to one-half of the perimeter of the fire needle body 10, and the perimeter of the fireproof layer 30 is less than the perimeter of the fire needle body 10, it is equivalent to that the fireproof layer 30 occupies more area on the fire needle body 10, that is, the attachment area of the fireproof layer 30 on the fire needle body 10 is larger, which can effectively avoid the problem that the fireproof layer 30 is easily separated from the fire needle body 10, and the fireproof layer 30 does not occupy the entire outer surface of the fire needle body 10, that is, the fireproof layer 30 is only arranged on part of the surface of the fire needle body 10, which ensures that the surface of the fire needle body 10 is not covered by the fireproof layer 30, and then the part of the surface is burned by the flame, thereby realizing the fire detection function of the fire needle body 10. That is, by setting the perimeter of the fireproof layer 30 to be greater than or equal to one-half of the perimeter of the fire needle body 10, and the perimeter of the fireproof layer 30 to be less than the perimeter of the fire needle body 10, on the one hand, the fireproof layer 30 can be prevented from being easily separated from the fire needle body, and the fireproof layer 30 covers more of the fire needle body 10, which has a better protection effect on the fire needle body 10, and ensures that the fire needle body 10 is not easily deformed after being burned, and on the other hand, the surface of the fire needle body 10 is left uncovered by the fireproof layer 30, thereby ensuring that the fire detection function of the fire needle body 10 is not affected.

[0066] It should be noted that in the embodiments of the present application, the perimeter of the fireproof layer 30 can be one-half of the perimeter of the fire needle body 10, the perimeter of the fireproof layer 30 can also be two-thirds of the perimeter of the fire needle body 10, and the perimeter of the fireproof layer 30 can also be three-quarters of the perimeter of the fire needle body 10. The specific value of the perimeter of the fireproof layer 30 occupying the perimeter of the fire needle body 10 is not limited in the embodiments of the present application.

[0067] In addition, in the embodiments of the present application, the fire needle body 10 has a first diameter 101 and a second diameter 102 perpendicular to each other, the extension direction of the first diameter 101 is horizontal, and the extension direction of the second diameter 102 is vertical. The fireproof layer 30 covers the surface of the first side of the first diameter 101 on the fire needle body 10, and the fireproof layer 30 covers part of the surface of the second side of the first diameter 101 on the fire needle body 10, and the projection of the end of the second side of the first diameter 101 on the plane where the second diameter 102 is located is the projection of the first diameter 101 on the plane where the second diameter 102 is located, as shown in Figure 6 The distance between the two is A, which satisfies: 0.2mm≤A≤0.5mm.

[0068] A can be any value between 0.2mm and 0.5mm, for example, A is equal to 0.2mm, for another example, A is equal to 0.3mm, for another example, A is equal to 0.4mm, and for another example, A is equal to 0.5mm. The specific value of A is not limited in the embodiments of the present application.

[0069] In addition, in some embodiments, the length of the fireproof layer 30 is less than or equal to the length of the fire detecting needle body 10 in the axial direction of the fire detecting needle body 10, and the length of the fire detecting needle body 10 is the distance from the end of the fire detecting needle body 10 away from the mounting body 20 to the mounting body 20.

[0070] Since the length of the fireproof layer 30 is less than or equal to the length of the fire detecting needle body 10, the fireproof layer 30 can completely cover the surface of the fire detecting needle body 10 in the axial direction of the fire detecting needle body 10, so that the fire detecting needle body 10 is more protected by the fireproof layer 30, or the fireproof layer 30 does not completely cover the surface of the fire detecting needle body 10 in the axial direction of the fire detecting needle body 10, so that the material of the fireproof layer 30 can be saved and the cost can be reduced. That is, by setting the length of the fireproof layer 30 to be less than or equal to the length of the fire detecting needle body 10, the fireproof layer 30 can effectively protect the fire detecting needle body 10 in the axial direction of the fire detecting needle body 10, and the problem of deformation of the fire detecting needle body 10 in the axial direction can be avoided.

[0071] It should be noted that in the embodiments of the present application, the length of the fireproof layer 30 can be the distance between the two opposite ends of the fireproof layer 30 in the axial direction of the fire detecting needle body 10.

[0072] In addition, in some embodiments, the fireproof layer 30 is in contact with the mounting body 20, and the distance between the fireproof layer 30 and the end of the fire detecting needle body 10 away from the mounting body 20 is L, and 5mm≤L≤10mm is satisfied.

[0073] Since the fireproof layer 30 is in contact with the mounting body 20, and the distance between the fireproof layer 30 and the end of the fire detecting needle body 10 away from the mounting body 20 is L, the length of the fireproof layer 30 is less than the length of the fire detecting needle body 10 in the axial direction of the fire detecting needle body 10, and the end of the fire detecting needle body 10 away from the mounting body 20 is in an exposed state, so that the end of the fire detecting needle body 10 away from the mounting body 20 can effectively detect the flame when it is burned by the flame. That is, by setting the distance between the fireproof layer 30 and the end of the fire detecting needle body 10 away from the mounting body 20 as L, it can be ensured that the end of the fire detecting needle body 10 away from the mounting body 20 can effectively detect the flame in the axial direction of the fire detecting needle body 10, so that the fire detecting needle body 10 has a surface that is not covered by the fireproof layer 30 in the circumferential direction of the fire detecting needle body 10, and the end of the fire detecting needle body 10 away from the mounting body 20 is not covered by the fireproof layer 30 in the axial direction of the fire detecting needle body 10, so that the area of the fire detecting needle body 10 available for the flame to burn is larger under the premise of ensuring that the fire detecting needle body 10 is effectively protected by the fireproof layer 30, so that the fire detecting function of the fire detecting needle body 10 is better.

[0074] In addition, L satisfies: 5mm≤L≤10mm, which can ensure that the end of the fire detection needle body 10 away from the installation body 20 has a larger area not covered by the fireproof layer 30 in the axial direction of the fire detection needle body 10, and the fire detection function of the fire detection needle body 10 is better.

[0075] It should be noted that in the embodiments of the present application, L can be any value between 5mm and 10mm, for example, L is 5mm, for another example, L is 6mm, for another example, L is 7mm, for another example, L is 8mm, for another example, L is 9mm, and for another example, L is 10mm. The specific value of L is not limited in the embodiments of the present application.

[0076] In addition, in some embodiments, the thickness of the fireproof layer 30 ranges from 0.5mm to 2mm.

[0077] Since the thickness of the fireproof layer 30 ranges from 0.5mm to 2mm, the thickness of the fireproof layer 30 can be appropriate, avoiding the problem that the thickness of the fireproof layer 30 is too small, the protection effect of the fireproof layer 30 on the fire detection needle body 10 is poor, and the fire detection needle body 10 may still be deformed. It can also avoid the problem that the thickness of the fireproof layer 30 is too large, resulting in the need for more fireproof materials and increased cost. That is, by setting the thickness of the fireproof layer 30 to range from 0.5mm to 2mm, the cost can be saved under the premise of ensuring that the fireproof layer 30 effectively protects the fire detection needle body 10.

[0078] It should be noted that the thickness of the fireproof layer 30 can be any value between 0.5mm and 2mm, for example, the thickness of the fireproof layer 30 is 0.5mm, for another example, the thickness of the fireproof layer 30 is 0.6mm, for another example, the thickness of the fireproof layer 30 is 0.7mm, for another example, the thickness of the fireproof layer 30 is 0.8mm, for another example, the thickness of the fireproof layer 30 is 0.9mm, for another example, the thickness of the fireproof layer 30 is 1.1mm, for another example, the thickness of the fireproof layer 30 is 1.3mm, for another example, the thickness of the fireproof layer 30 is 1.5mm, for another example, the thickness of the fireproof layer 30 is 1.7mm, and for another example, the thickness of the fireproof layer 30 is 2mm. The specific value of the thickness of the fireproof layer 30 is not limited in the embodiments of the present application. For example, as shown in FIG. 1B, the thickness of the fireproof layer 30 is 1mm. Figure 6 Figure 6

[0079] In addition, in some embodiments, the fire detection device of the gas water heater can further include a first connecting line 40; the first end of the first connecting line 40 is located in the installation body 20 and connected with the fire detection needle body 10, and the first connecting line 40 is used to transmit the flame ion current signal.

[0080] ​​Since the first end of the first connecting line 40 is located in the mounting body 20 and connected with the flame detector body 10, after the flame detection device is applied in the gas water heater, the second end of the first connecting line 40 can be electrically connected with the controller of the gas water heater, so that the controller of the gas water heater can receive the flame ionization current signal through the first connecting line 40, and then the controller can determine whether the flame detector body 10 is burned by the flame. That is, by arranging the first connecting line 40, after the flame detection device is applied in the gas water heater, the flame detector body 10 can be electrically connected with the controller of the gas water heater, so as to facilitate the controller to determine whether the flame detector body 10 is burned by the flame.

[0081] It should be noted that in actual application, after the flame detection device is applied in the gas water heater, the controller can be electrically connected with the first connecting line 40, so that the controller can provide voltage to the flame detector body 10, so that once the flame burns the flame detector body 10, the flame has conductivity, so that the current can be transmitted to the component generating the flame, and the component generating the flame can form a loop with the controller, so that the current forms a path, and the controller can receive the current through the first connecting line 40, so as to determine that the flame detector body 10 is burned by the flame.

[0082] In addition, in the embodiment of the present application, the number of the first connecting line 40 can be set according to actual needs, for example, the number of the first connecting line 40 is 1, and for another example, the number of the first connecting line 40 is 2. The specific number of the first connecting line 40 is not limited in the embodiment of the present application.

[0083] In addition, in some embodiments, the flame detection device of the gas water heater can further include a second connecting line 50; the first end of the second connecting line 50 is located in the mounting body 20 and connected with the flame detector body 10, and the second connecting line 50 is used to transmit the resistance value of the flame detector body 10.

[0084] Since the first end of the second connecting line 50 is located in the mounting body 20 and connected with the flame detector body 10, after the flame detector is applied in the gas water heater, the second end of the second connecting line 50 can be electrically connected with the controller of the gas water heater, so that the controller of the gas water heater can receive the resistance value of the flame detector body 10 through the second connecting line 50, and then the controller can determine whether the flame detector body 10 is burned by the flame. That is, by arranging the second connecting line 50, after the flame detector is applied in the gas water heater, the flame detector body 10 is electrically connected with the controller of the gas water heater, and the resistance value of the flame detector body 10 can be transmitted through the second connecting line 50 after the function of determining whether the gas water heater has flame by the flame detector body 10 transmitting the flame ion current signal through the first connecting line 40 fails, and then the controller determines whether there is flame in the gas water heater according to the resistance value, so that the controller determines whether there is flame in the gas water heater more accurately.

[0085] It should be noted that in actual application, after the flame detector is applied in the burner, the controller can be electrically connected with the second connecting line 50, so that the controller can be electrically connected with the flame detector body 10. The flame detector body 10 can have a thermocouple function, and the flame detector body 10 will generate different resistance values at different temperatures, so that once the flame burns the flame detector body 10, the resistance value of the flame detector body 10 will change, and the resistance value of the flame detector body 10 can be transmitted to the controller of the gas water heater through the second connecting line 50, so that the controller can determine whether there is flame in the gas water heater based on the resistance value of the flame detector body 10.

[0086] In addition, in the embodiment of the present application, the number of second connecting lines 50 can be set according to actual needs, for example, the number of second connecting lines 50 is 2, and for example, the number of second connecting lines 50 is 4. The specific number of second connecting lines 50 is not limited in the embodiment of the present application.

[0087] In addition, in some embodiments, the flame detector of the gas water heater can further include a connecting terminal 60; the first connecting line 40 and the second connecting line 50 are connected to the connecting terminal 60, and the connecting terminal 60 is used to connect the controller of the gas water heater.

[0088] Since the first connecting line 40 and the second connecting line 50 are connected to the connecting terminal 60, when the fire detecting device is applied to the gas water heater, the connecting terminal 60 can be directly electrically connected to the controller of the gas water heater, so that the first connecting line 40 and the second connecting line 50 are electrically connected to the controller of the gas water heater, and the controller can obtain corresponding signals through the first connecting line 40 and the second connecting line 50. That is, by arranging the connecting terminal 60, the first connecting line 40 and the second connecting line 50 can be electrically connected to the controller of the gas water heater, and then the controller of the gas water heater can obtain corresponding information of the fire detecting needle body 10.

[0089] It should be noted that the controller of the gas water heater can have a plug interface, and when the connecting terminal 60 needs to be connected to the controller, the connecting terminal 60 can be directly plugged into the plug interface, so that the first connecting line 40 and the second connecting line 50 are electrically connected to the controller.

[0090] In the embodiment of the present application, since one end of the fire detecting needle body 10 is fixed in the mounting body 20, when the fire detecting needle body 10 is installed in the gas water heater, the fire detecting needle body 10 can be installed in the gas water heater through the mounting body 20, and the mounting body 20 can fix the fire detecting needle body 10 in the gas water heater. Since the fire detecting needle body 10 is provided with the fireproof layer 30 covering at least part of the surface of the fire detecting needle body 10, once the fire detecting needle body 10 is installed in the gas water heater, the flame in the gas water heater can burn the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30, so that the fire detecting needle body 10 can detect fire, and the existence of the fireproof layer 30 can fix the fire detecting needle body 10, avoiding the problem of deformation of the fire detecting needle body 10 caused by long-term burning by the flame. That is, in the embodiment of the present application, by arranging the fireproof layer 30 on the fire detecting needle body 10 and covering at least part of the surface of the fire detecting needle body 10, after the fire detecting needle body 10 is applied to the gas water heater, the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30 can be burned by the flame, ensuring that the fire detecting needle body 10 can have the function of detecting fire, and the fireproof layer 30 can ensure that the fire detecting needle body 10 always remains in the initial state, avoiding the problem that the fire detecting needle body 10 is easily deformed after being burned, which affects the fire detecting function of the fire detecting needle body 10, and further avoiding the problem that the fire detecting function of the fire detecting needle body 10 is invalid. That is, in the embodiment of the present application, the fire detecting needle body 10 can be effectively prevented from being deformed, and the fire detecting performance of the fire detecting needle body 10 is improved.

[0091] The embodiment of the present application provides a gas water heater, which comprises a burner shell 100, a combustion single piece 200, and a fire detecting device of the gas water heater in any one of the above embodiments.

[0092] The combustion single piece 200 is arranged in the burner shell 100, the mounting body 20 is arranged in the burner shell 100, and the flame detector body 10 is located in the burner shell 100, the flame detector body 10 is opposite to the combustion single piece 200, and the surface of the flame detector body 10 not covered by the fireproof layer 30 faces the combustion single piece 200.

[0093] In the embodiment of the present application, since one end of the flame detector body 10 is fixed in the mounting body 20, and the mounting body 20 is arranged in the burner shell 100, the flame detector body 10 is mounted in the gas water heater through the mounting body 20, and the mounting body 20 can fix the flame detector body 10 in the gas water heater. Since the flame detector body 10 is provided with the fireproof layer 30, the fireproof layer 30 covers at least part of the surface of the flame detector body 10, the combustion single piece 200 is arranged in the burner shell 100, the flame detector body 10 is located in the burner shell 100, the flame detector body 10 is opposite to the combustion single piece 200, and the surface of the flame detector body 10 not covered by the fireproof layer 30 faces the combustion single piece 200, therefore, once the combustion single piece 200 generates flame, the flame can burn the surface of the flame detector body 10 not covered by the fireproof layer 30, so that the flame detector body 10 can detect fire, and the existence of the fireproof layer 30 can fix the flame detector body 10, avoiding the problem of deformation of the flame detector body 10 caused by long-term burning of the flame. That is, in the embodiment of the present application, by arranging the fireproof layer 30 on the flame detector body 10, and the fireproof layer 30 covering at least part of the surface of the flame detector body 10, the surface of the flame detector body 10 not covered by the fireproof layer 30 can be burned by the flame, ensuring that the flame detector body 10 can have the function of detecting fire, and the fireproof layer 30 can ensure that the flame detector body 10 always remains in the initial state, avoiding the problem that the flame detector body 10 is easily deformed after being burned, causing the function of detecting fire of the flame detector body 10 to be affected, thereby avoiding the problem that the function of detecting fire of the flame detector body 10 fails, thereby reducing the failure rate of the gas water heater and prolonging the service life of the gas water heater.

[0094] It should be noted that the burner shell 100 can be provided with a mounting hole, and the mounting body 20 can be mounted in the mounting hole, so that the flame detector body 10 is located in the burner shell 100.

[0095] In addition, in the embodiment of the present application, the gas water heater can further include a flame detector fixing piece 400, the flame detector fixing piece 400 is fixed to the burner shell 100, and the flame detector fixing piece 400 is fixedly connected with the mounting body 20, so as to fix the flame detector body 10 through the flame detector fixing piece 400.

[0096] In addition, in some embodiments, the gas water heater further comprises an ignition needle 300; the ignition needle 300 is arranged in the burner shell 100, and the ignition needle 300 is used for ignition.

[0097] Since the ignition needle 300 is arranged in the burner shell 100, when it is required to have a flame in the gas water heater, the ignition needle 300 can be ignited, so that the combustion single piece 200 can be combusted to generate a flame. That is, by arranging the ignition needle 300, the ignition of the gas water heater can be facilitated.

[0098] In addition, in the embodiments of the present application, the gas water heater can further comprise an ignition fixing sheet 500, the ignition fixing sheet 500 is fixed on the burner shell 100, and the ignition needle 300 is fixedly connected with the ignition fixing sheet 500, so as to fix the ignition needle 300 through the ignition fixing sheet 500, thereby avoiding the problem of easy shaking of the ignition needle 300.

[0099] In addition, in actual application, the fire detection needle body 10 can be located above the combustion single piece 200, and the fire detection needle body 10 is distributed in a spaced manner with the combustion single piece 200, so that once the combustion single piece 200 generates a flame, the flame can burn the surface of the fire detection needle body 10 which is not covered by the fireproof layer 30.

[0100] In the embodiment of the present application, since one end of the fire detecting needle body 10 is fixed in the mounting body 20, and the mounting body 20 is arranged in the burner shell 100, the fire detecting needle body 10 is mounted in the gas water heater through the mounting body 20, and the mounting body 20 can fix the fire detecting needle body 10 in the gas water heater. Since the fireproof layer 30 is arranged on the fire detecting needle body 10, the fireproof layer 30 covers at least part of the surface of the fire detecting needle body 10, the combustion single piece 200 is arranged in the burner shell 100, the fire detecting needle body 10 is located in the burner shell 100, the fire detecting needle body 10 is opposite to the combustion single piece 200, and the part of the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30 faces the combustion single piece 200, therefore, once the combustion single piece 200 generates flame, the flame can burn the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30, so that the fire detecting needle body 10 can detect fire, and the existence of the fireproof layer 30 can fix the fire detecting needle body 10, avoiding the problem that the fire detecting needle body 10 is deformed due to being burned by the flame for a long time. That is, in the embodiment of the present application, the fireproof layer 30 is arranged on the fire detecting needle body 10, and at least part of the surface of the fire detecting needle body 10 is covered by the fireproof layer 30, so that the surface of the fire detecting needle body 10 which is not covered by the fireproof layer 30 can be burned by the flame, ensuring that the fire detecting needle body 10 can have the function of detecting fire, and the fireproof layer 30 can ensure that the fire detecting needle body 10 always keeps the initial state, avoiding the problem that the fire detecting needle body 10 is deformed after being burned, causing the function of detecting fire of the fire detecting needle body 10 to be affected, and further avoiding the problem that the function of detecting fire of the fire detecting needle body 10 is invalid, thereby reducing the failure rate of the gas water heater and prolonging the service life of the gas water heater.

[0101] The embodiment of the present application provides a fire detecting control method, which is applied to the gas water heater in any one of the above-mentioned embodiments, and the gas water heater has a first detection mode and a second detection mode. The first detection mode is a flame ion current fire detecting mode, and the second detection mode is a temperature monitoring fire detecting mode. Figure 11 As shown in the figure, the fire detecting control method comprises the following steps.

[0102] Step 1101: Determine whether the first detection mode is normal.

[0103] The gas water heater has a first detection mode and a second detection mode, and both the first detection mode and the second detection mode are used to detect whether there is a flame in the gas water heater. In the gas water heater, the controller can be electrically connected with the first connecting line, so that the controller can provide a voltage to the flame detection needle body. Once the flame burns the flame detection needle body, the flame has conductivity, so that the current can be transmitted to the component generating the flame, and the component generating the flame can form a loop with the controller, so that the current forms a path, and the controller can receive the current through the first connecting line, so as to determine that the flame detection needle body is burned by the flame, and further determine that the gas water heater has the flame. That is, when the gas water heater is in the first detection mode, the controller needs to receive the current to determine whether the gas water heater has the flame.

[0104] In addition, in some implementations, the implementation of step 1101 can be: detecting the current value transmitted from the flame detection needle body; if the current value is within the preset current range, determining that the first detection mode is normal; and if the current value is not within the preset current range, determining that the first detection mode is abnormal.

[0105] Specifically, the controller can receive the current value transmitted from the first connecting line, so that the controller can detect the current value transmitted from the flame detection needle body, and the controller can judge the current value. If the current value is within the preset current range, it indicates that the flame in the gas water heater normally burns the detection needle body, that is, the first detection mode is normal. If the current value is not within the preset current range, it indicates that the first detection mode of the gas water heater may be invalid, that is, the first detection mode of the gas water heater is abnormal.

[0106] It should be noted that the preset current range can be set according to actual needs. The specific range of the preset current range is not limited in the embodiment of the present application.

[0107] Step 1102: In the case that the first detection mode is abnormal, the gas water heater is controlled to switch from the first detection mode to the second detection mode.

[0108] Once the first detection mode is abnormal, the gas water heater can be directly controlled to switch to the second detection mode, so that whether there is a flame in the gas water heater is detected through the second detection mode, so that the detection of the flame by the gas water heater is more accurate, and the service life of the gas water heater can be prolonged, avoiding the problem that the user needs to repair or replace the gas water heater after the first detection mode is invalid, resulting in an increase in the use cost of the user.

[0109] Step 1103: monitoring the resistance value of the flame detection needle body, and determining whether the gas water heater has a flame according to the resistance value of the flame detection needle body.

[0110] The fire detecting needle body can have a thermocouple function. The fire detecting needle body generates different resistance values at different temperatures. Once the fire burns the fire detecting needle body, the resistance value of the fire detecting needle body changes. The resistance value of the fire detecting needle body can be transmitted to the controller of the gas water heater through the second connecting line. The controller can monitor the resistance value of the fire detecting needle body. The controller can determine whether the gas water heater has a flame according to the resistance value of the fire detecting needle body.

[0111] In addition, in some implementations, the implementation of determining whether the gas water heater has a flame according to the resistance value of the fire detecting needle body can be: converting the resistance value of the fire detecting needle body into a temperature value; determining whether the temperature value is greater than a preset temperature threshold; determining that the gas water heater has a flame when the temperature value is greater than or equal to the preset temperature threshold; and determining that the gas water heater does not have a flame when the temperature value is less than the preset temperature threshold.

[0112] The controller can convert the resistance value of the fire detecting needle body into a temperature value. The controller can compare the temperature value with the preset temperature threshold. Once the temperature value is greater than or equal to the preset temperature threshold, it indicates that the gas water heater has a flame. Once the temperature value is less than the preset temperature threshold, it indicates that the gas water heater does not have a flame.

[0113] It should be noted that when converting the resistance value into the temperature value, the conversion can be performed according to the correspondence between the resistance value and the temperature value. In the correspondence between the resistance value and the temperature value, one resistance value corresponds to one temperature value. Once the controller monitors the resistance value of the fire detecting needle body, the temperature value can be directly determined, and then the size relationship between the temperature value and the preset temperature threshold can be determined.

[0114] In addition, in the embodiments of the present application, the preset temperature threshold can be any value in 60-200℃. For example, the preset temperature threshold is 60℃, for another example, the preset temperature threshold is 80℃, for another example, the preset temperature threshold is 100℃, for another example, the preset temperature threshold is 120℃, for another example, the preset temperature threshold is 160℃, for another example, the preset temperature threshold is 200℃. The embodiments of the present application do not limit this.

[0115] In the embodiments of the present application, whether the first detection mode is normal is determined. In the case that the first detection mode is not normal, the gas water heater is controlled to switch from the first detection mode to the second detection mode. The resistance value of the fire detecting needle body is monitored, and whether the gas water heater has a flame is determined according to the resistance value of the fire detecting needle body. That is, in the embodiments of the present application, when the first detection mode of the gas water heater fails, the mode of the gas water heater can be switched, so that whether the gas water heater has a flame is determined by the resistance value of the fire detecting needle body, and the flame detection in the gas water heater is more accurate.

[0116] Optionally, as shown in Figure 12 The electronic device 1200 includes a processor 1201 and a memory 1202. The memory 1202 stores programs or instructions executable by the processor 1201. When the programs or instructions are executed by the processor 1201, the programs or instructions implement the steps of the fire detection control method embodiments described above and achieve the same technical effects. To avoid repetition, the steps are not described again here.

[0117] It should be noted that the electronic device in the embodiments of the present application includes the mobile electronic device and the non-mobile electronic device described above.

[0118] Figure 13 A hardware structure schematic diagram of an electronic device according to an embodiment of the present application is shown.

[0119] The electronic device 1200 includes, but is not limited to, a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

[0120] Those skilled in the art can understand that the electronic device 1200 can also include a power supply (such as a battery) for powering each component. The power supply can be logically connected to the processor 1010 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. Figure 13 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device can include more or fewer components than shown, or combine certain components, or have a different arrangement of components, which is not described again here.

[0121] The processor 1010 is configured to determine whether the first detection mode is normal, control the gas water heater to switch from the first detection mode to the second detection mode in the case that the first detection mode is not normal, monitor the resistance value of the fire detection needle body, and determine whether the gas water heater has a flame according to the resistance value of the fire detection needle body.

[0122] In the embodiments of the present application, by determining whether the first detection mode is normal, controlling the gas water heater to switch from the first detection mode to the second detection mode in the case that the first detection mode is not normal, monitoring the resistance value of the fire detection needle body, and determining whether the gas water heater has a flame according to the resistance value of the fire detection needle body. That is, in the embodiments of the present application, when the first detection mode of the gas water heater fails, the mode of the gas water heater can be switched, so that whether the gas water heater has a flame is determined by the resistance value of the fire detection needle body, thereby making the flame detection in the gas water heater more accurate.

[0123] Optionally, the processor 1010 is further configured to convert the resistance value of the flame detector needle body into a temperature value, determine whether the temperature value is greater than a preset temperature threshold, determine that the gas water heater has a flame when the temperature value is greater than or equal to the preset temperature threshold, and determine that the gas water heater has no flame when the temperature value is less than the preset temperature threshold.

[0124] Optionally, the processor 1010 is further configured to detect a current value transmitted from the flame detector needle body, determine that the first detection mode is normal when the current value is within a preset current range, and determine that the first detection mode is abnormal when the current value is not within the preset current range.

[0125] In the embodiments of the present application, whether the first detection mode is normal is determined, the gas water heater is switched from the first detection mode to the second detection mode in the case that the first detection mode is abnormal, and the resistance value of the flame detector needle body is monitored to determine whether the gas water heater has a flame according to the resistance value of the flame detector needle body. That is, in the embodiments of the present application, when the first detection mode of the gas water heater fails, the mode of the gas water heater can be switched, so that whether the gas water heater has a flame is determined by the resistance value of the flame detector needle body, thereby making the flame detection in the gas water heater more accurate.

[0126] It should be understood that, in the embodiments of the present application, the input unit 1004 can include a graphics processing unit (GPU) 10041 and a microphone 10042. The graphics processing unit 10041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1006 can include a display panel 10061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1007 includes at least one of a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 can include a touch detection device and a touch controller. The other input devices 10072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, and the like, which will not be described here.

[0127] The memory 1009 can be used to store software programs and various data. The memory 1009 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 1009 can include a volatile memory or a non-volatile memory, or the memory 1009 can include both volatile and non-volatile memories. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 1009 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0128] The processor 1010 can include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 1010.

[0129] The embodiments of the present application also provide a readable storage medium, and the readable storage medium stores programs or instructions, the programs or instructions are executed by a processor to realize various processes of the above-mentioned fire detection control method embodiments, and the same technical effects can be achieved, and thus details are not repeated here.

[0130] The processor is a processor in the electronic device in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0131] The chip provided by the embodiment of the present application includes a processor and a communication interface. The communication interface is coupled with the processor. The processor is used to run programs or instructions to realize the processes of the above fire detection control method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0132] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system level chip, a system chip, a chip system or a system on chip, etc.

[0133] The embodiment of the present application provides a computer program product. The program product is stored in a storage medium. The program product is executed by at least one processor to realize the processes of the above fire detection control method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0134] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0135] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A flame failure device for a gas water heater, characterised in that, The fire detection device of the gas water heater comprises a fire detection needle body and a mounting body; One end of the fire detection needle body is fixed in the mounting body, and the mounting body is used for fixing the fire detection needle body in the gas water heater; A fireproof layer is arranged on the fire detection needle body, the fireproof layer covers at least part of the surface of the fire detection needle body, the part of the surface of the fire detection needle body not covered by the fireproof layer is used for flame burning and flame detection, and the fireproof layer is connected with the mounting body; The circumference of the fireproof layer is greater than or equal to one half of the circumference of the fire detection needle body in the circumferential direction of the fire detection needle body, and the circumference of the fireproof layer is less than the circumference of the fire detection needle body; The length of the fireproof layer is less than or equal to the length of the fire detection needle body in the axial direction of the fire detection needle body, and the length of the fire detection needle body is the distance from one end of the fire detection needle body away from the mounting body to the mounting body.

2. A flame failure device for a gas water heater as claimed in claim 1, characterised in that, The fireproof layer is in contact with the mounting body, and the distance between the fireproof layer and one end of the fire detection needle body away from the mounting body is L, which satisfies 5mm≤L≤10mm.

3. A flame failure device for a gas water heater as claimed in claim 1 wherein, The thickness of the fireproof layer ranges from 0.5mm to 2mm.

4. The flame detector for a gas water heater according to claim 1, wherein The fire detection device of the gas water heater further comprises a first connecting line; The first end of the first connecting line is located in the mounting body and connected with the fire detection needle body, and the first connecting line is used for transmitting a flame ion current signal.

5. A flame failure device for a gas water heater as claimed in claim 4 wherein, The fire detection device of the gas water heater further comprises a second connecting line; The first end of the second connecting line is located in the mounting body and connected with the fire detection needle body, and the second connecting line is used for transmitting the resistance value of the fire detection needle body.

6. A flame failure device for a gas water heater as claimed in claim 5 wherein, The fire detection device of the gas water heater further comprises a connecting terminal; The first connecting line and the second connecting line are both connected to the connecting terminal, and the connecting terminal is used for connecting a controller of the gas water heater.

7. A gas water heater characterized by, The gas water heater comprises a burner shell, a combustion single piece, and the fire detection device of the gas water heater according to any one of claims 1-6; The combustion single piece is arranged in the burner shell, the mounting body is arranged in the burner shell, the fire detection needle body is located in the burner shell, the fire detection needle body is opposite to the combustion single piece, and the part of the surface of the fire detection needle body not covered by the fireproof layer faces the combustion single piece.

8. The gas water heater of claim 7, wherein, The gas water heater further comprises an ignition needle; The ignition needle is arranged in the burner shell and is used for ignition.

9. A fire detection control method characterized by comprising: The gas water heater has a first detection mode and a second detection mode, the first detection mode is a flame ion current fire detection mode, and the second detection mode is a temperature monitoring fire detection mode; The fire detection control method comprises: Determining whether the first detection mode is normal; In the case that the first detection mode is not normal, controlling the gas water heater to switch from the first detection mode to the second detection mode; Monitoring the resistance value of the fire detection needle body, and determining whether the gas water heater has flame according to the resistance value of the fire detection needle body.

10. The flame detection control method according to claim 9, characterized by, The method comprises the following steps: Converting the resistance value of the flame detector needle body into a temperature value; Determining whether the temperature value is greater than a preset temperature threshold value; If the temperature value is greater than or equal to the preset temperature threshold value, it is determined that the gas water heater has a flame; if the temperature value is less than the preset temperature threshold value, it is determined that the gas water heater has no flame.

11. The flame detection control method according to claim 9, wherein The method comprises the following steps: Detecting a current value transmitted from the flame detector needle body; If the current value is within a preset current range, it is determined that the first detection mode is normal; if the current value is not within the preset current range, it is determined that the first detection mode is abnormal.

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