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

Abstract

The invention 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 gas water heaters. 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 body and covers at least part of the surface of the fire detection needle body, and the part, not covered by the fireproof layer, of the surface of the fire detection needle body is used for flame combustion and flame detection.

Description

Technical Field

[0001] The present application belongs to the field of gas water heaters, and specifically relates to a fire detection device for a gas water heater, a gas water heater and a fire detection control method. Background Art

[0002] With the development of science and technology, gas water heaters have become a common item in daily life, making people's lives more convenient. Usually, a fire detection pin is provided in a gas water heater. The fire detection pin is the core component of the gas water heater combustion control system. The fire detection end of the fire detection pin is arranged above the combustion monolithic chip of the gas water heater, and the fire detection pin is electrically connected to the controller of the gas water heater. When the gas water heater is ignited and heated, the flame will burn the fire detection pin. Due to the conductivity of the flame ions, the whole will form an electrical signal path to achieve effective monitoring of the combustion flame. By monitoring the flame signal, the working or fault states such as successful ignition of the gas water heater, accidental flameout during heating, and end of heating can be identified, and safety protection can be performed. However, in the related art, the fire detection pin is easy to deform, which affects the fire detection function of the fire detection pin, and even causes the fire detection function of the fire detection pin to fail. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a fire detection device for a gas water heater, a gas water heater and a fire detection control method, which at least solves the problem that the fire detection needle is easily deformed, causing the fire detection function of the fire detection needle to be affected, or even causing the fire detection function of the fire detection needle to fail.

[0004] In a first aspect, an embodiment of the present application provides a fire detection device for a gas water heater, the fire detection device for a 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 installation body, and the installation body is used to fix the fire detection needle body in the gas water heater;

[0006] The fire detection needle body is provided with a fireproof layer, which covers at least a portion of the surface of the fire detection needle body. The portion of the surface of the fire detection needle body not covered by the fireproof layer is used for flame combustion and flame detection.

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

[0008] Optionally, along the axial direction of the fire detection needle body, the length of the fire protection layer is less than or equal to the length 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 installation body to the installation body.

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

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

[0011] Optionally, the fire detection device of the gas water heater further includes a first connecting line;

[0012] The first end of the first connecting line is located in the installation body and connected to the fire detection needle body. The first connecting line is used to transmit the flame ion current signal.

[0013] Optionally, the fire detection device of the gas water heater further includes a second connecting line;

[0014] The first end of the second connecting line is located in the installation body and connected to the fire detection needle body, and the second connecting line is used to transmit the resistance value of the fire detection needle body.

[0015] Optionally, the fire detection device of the gas water heater further includes a connection terminal;

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

[0017] In a second aspect, an embodiment of the present application provides a gas water heater, the gas water heater comprising a burner housing, a combustion monolithic chip, and a fire detection device of the gas water heater described in any one of the first aspects above;

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

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

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

[0021] In a third aspect, an embodiment of the present application provides a fire detection control method, which is applied to a gas water heater described in any one of the second aspects above, wherein the gas water heater has a first detection mode and a second detection mode, wherein the first detection mode is a flame ion current fire detection mode, and the second mode is a temperature monitoring fire detection mode; the fire detection control method comprises:

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

[0023] When the first detection mode is abnormal, controlling the gas water heater to switch from the first detection mode to the second detection mode;

[0024] The resistance value of the fire detection needle body is monitored, and whether the gas water heater has a flame is determined based on the resistance value of the fire detection needle body.

[0025] Optionally, determining whether the gas water heater has a flame based on the resistance value of the fire detection needle body includes:

[0026] Converting the resistance value of the fire detection needle body into a temperature value;

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

[0028] When the temperature value is greater than or equal to the preset temperature threshold, it is determined that the gas water heater has flame; when the temperature value is less than the preset temperature threshold, it is determined that the gas water heater has no flame.

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

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

[0031] If the current value is within the 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.

[0032] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the fire detection control method described in the third aspect are implemented.

[0033] In a fifth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the fire detection control method described in the third aspect are implemented.

[0034] In a sixth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the fire detection control method as described in the third aspect.

[0035] In a seventh aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the fire detection control method as described in the third aspect.

[0036] In the embodiment of the present application, since one end of the fire detection needle body is fixed in the installation body, when the fire detection needle body is installed in the gas water heater, the fire detection needle body can be installed in the gas water heater through the installation body, and the installation body can fix the fire detection needle body in the gas water heater. Since a fireproof layer is provided on the fire detection needle body, and the fireproof layer covers at least part of the surface of the fire detection needle body, once the fire detection needle body is installed in the gas water heater, the flame in the gas water heater can burn the surface of the fire detection needle body that is not covered by the fireproof layer, so that the fire detection needle body can detect fire, and the existence of the fireproof layer can fix the fire detection needle body, avoiding the problem of deformation of the fire detection needle body due to long-term burning by flames. That is, in the embodiment of the present application, by providing a fireproof layer on the fire detection needle body, and the fireproof layer covers at least part of the surface of the fire detection needle body, after the fire detection needle body is applied in the gas water heater, the surface of the fire detection needle body not covered by the fireproof layer can be burned by the flame, ensuring that the fire detection needle body can have the fire detection function, and the fireproof layer can ensure that the fire detection needle body always maintains the initial state, avoiding the fire detection needle body from being easily deformed after being burned, resulting in the fire detection function of the fire detection needle body being affected, thereby avoiding the problem of the fire detection function of the fire detection needle body failing. That is, in the embodiment of the present application, it can be effectively ensured that the fire detection needle body is not easy to deform, thereby improving the fire detection performance of the fire detection needle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 One of the schematic diagrams showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0038] Figure 2 A second schematic diagram showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0039] Figure 3 A third schematic diagram showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0040] Figure 4 A fourth schematic diagram showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0041] Figure 5 A fifth schematic diagram showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0042] Figure 6 express Figure 5 The cross-sectional view at P1-P1 in the figure;

[0043] Figure 7 A sixth schematic diagram showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0044] Figure 8 A seventh schematic diagram showing a fire detection device for a gas water heater provided in an embodiment of the present application;

[0045] Fig. 9 One of the schematic diagrams showing a gas water heater provided in an embodiment of the present application;

[0046] Fig.10 A second schematic diagram showing a gas water heater provided in an embodiment of the present application;

[0047] Fig.11 A flow chart showing a fire detection control method provided in an embodiment of the present application;

[0048] Fig.12 A schematic diagram showing an electronic device provided in an embodiment of the present application;

[0049] Fig.13 A schematic diagram showing a hardware structure of an electronic device provided in an embodiment of the present application;

[0050] Reference numerals:

[0051] 10: fire detection needle body; 101: first diameter; 102: second diameter; 20: installation 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 plate; 500: ignition fixing plate. DETAILED DESCRIPTION

[0052] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means 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 objects connected before and after are in an "or" relationship.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] Before explaining the fire detection device of the gas water heater provided in the embodiment of the present application, the application scenario of the fire detection device of the gas water heater provided in the embodiment of the present application is first specifically described: In the related art, a fire detection needle is provided in the gas water heater, and the fire detection end of the fire detection needle is provided above the combustion monolithic plate of the gas water heater, and the fire detection needle is electrically connected to the controller of the gas water heater. When the gas water heater is ignited and heated, the flame will burn the fire detection needle. Due to the conductivity of the flame ions, the whole will form an electrical signal path, thereby effectively monitoring the combustion flame. By monitoring the flame signal, the working or fault states such as successful ignition of the gas water heater, accidental flameout during heating, and end of heating can be identified, and safety protection can be performed. However, the fire detection needle is usually made of metal alloys such as iron, aluminum, and nickel. After the fire detection needle is burned by the flame for a long time, it will be affected by its own gravity, which will cause the fire detection needle to deform, thereby affecting the fire detection function of the fire detection needle. When the fire detection needle is severely deformed, it may even cause the fire detection function of the fire detection needle to fail.

[0056] like Figures 1 to 10 As shown, the fire detection device of the gas water heater includes: a fire detection needle body 10 and a mounting body 20.

[0057] One end of the fire detection needle body 10 is fixed in the installation body 20, and the installation body 20 is used to fix the fire detection needle body 10 in the gas water heater; a fireproof layer 30 is provided on the fire detection needle body 10, and 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 provided for flame combustion and flame detection.

[0058] In the embodiment of the present application, since one end of the fire detection needle body 10 is fixed in the installation body 20, when the fire detection needle body 10 is installed in the gas water heater, the fire detection needle body 10 can be installed in the gas water heater through the installation body 20, and the installation body 20 can fix the fire detection needle body 10 in the gas water heater. Since the fire detection needle body 10 is provided with a fireproof layer 30, the fireproof layer 30 covers at least part of the surface of the fire detection needle body 10. Therefore, once the fire detection needle body 10 is installed in the gas water heater, the flame in the gas water heater can burn the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30, so that the fire detection needle body 10 can detect fire, and the existence of the fireproof layer 30 can fix the fire detection needle body 10, avoiding the problem of deformation of the fire detection needle body 10 due to long-term burning by flames. That is, in the embodiment of the present application, by providing a fireproof layer 30 on the fire detection needle body 10, and the fireproof layer 30 covers at least part of the surface of the fire detection needle body 10, after the fire detection needle body 10 is applied to the gas water heater, the surface of the fire detection needle body 10 not covered by the fireproof layer 30 can be burned by the flame, ensuring that the fire detection needle body 10 can have a fire detection function, and the fireproof layer 30 can ensure that the fire detection needle body 10 always maintains its initial state, avoiding the fire detection needle body 10 from being easily deformed after being burned, resulting in the fire detection function of the fire detection needle body 10 being affected, thereby avoiding the problem of the fire detection function of the fire detection needle body 10 failing. That is, in the embodiment of the present application, it can be effectively ensured that the fire detection needle body 10 is not easily deformed, thereby improving the fire detection performance of the fire detection needle body 10.

[0059] It should be noted that in the embodiment of the present application, the fireproof layer 30 can be formed of ceramics, that is, the fireproof layer 30 is a ceramic layer, wherein the ceramics have good stability and good high temperature resistance, so that the ceramics are not easily deformed by heat. Therefore, when the fireproof layer 30 is a ceramic layer, the ceramic layer can effectively protect the fire detector needle body 10, ensuring that the fire detector 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 a carbon composite refractory material. The carbon composite refractory material is a composite of two or more refractory oxides (MgO, CaO, Al 2 O 3 、ZrO 2 A multi-phase composite refractory material made of carbon materials and non-oxide materials as raw materials, and carbon materials as binders. For another example, the fireproof layer 30 is formed of dolomite refractory materials, which are alkaline refractory materials with 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 present embodiment.

[0060] In addition, in the embodiment of the present application, the material of the fire detection needle body 10 can be a metal alloy such as iron, aluminum, and nickel.

[0061] In addition, in the embodiment of the present application, the material of the installation body 20 can be formed of ceramic, that is, the installation body 20 is a ceramic body, so that the installation body 20 also has good stability and high temperature resistance, so that when the fire detection needle body 10 is burned by the flame, even if the fire detection needle body 10 transfers heat to the installation body 20, the installation body 20 is not easily deformed by heat, ensuring that the installation body 20 can continuously and stably fix the fire detection needle body 10 in the gas water heater. Of course, the material of the installation body 20 can also be other high temperature resistant materials. For example, the installation body 20 is formed of a carbon composite refractory material, which is a composite of two or more refractory oxides (MgO, CaO, Al2O3, etc.) of different properties. 2 O 3 、ZrO 2 The installation body 20 is a multi-phase composite refractory material made of carbon materials and non-oxide materials as raw materials, and carbon materials as binders. For another example, the installation body 20 is formed of dolomite refractory materials, which are alkaline refractory materials with 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 installation body 20 is not limited in the present embodiment.

[0062] In addition, in the embodiment of the present application, the shape of the installation body 20 can be set according to actual needs, for example, the shape of the installation body 20 is a cube, and for another example, the shape of the installation body 20 is a cylinder. This embodiment of the present application does not limit this.

[0063] In addition, in the embodiment of the present application, the fireproof layer 30 can be connected to the installation body 20, so as to ensure that at the connection between the fire detection needle body 10 and the installation body 20, the fireproof layer 30 can still protect the fire detection needle body 10, and ensure that the fire detection needle body 10 is not easily deformed at this connection.

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

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

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

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

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

[0069] In addition, in some embodiments, along the axial direction of the fire detection needle body 10, the length of the fire protection layer 30 is less than or equal to the length of the fire detection needle body 10, and the length of the fire detection needle body 10 is: the distance from one end of the fire detection needle body 10 away from the installation body 20 to the installation body 20.

[0070] Since the length of the fireproof layer 30 is less than or equal to the length of the fire detection needle body 10, the fireproof layer 30 can completely cover the surface of the fire detection needle body 10 in the axial direction of the fire detection needle body 10, so that the fire detection needle body 10 is more protected by the fireproof layer 30, and the fireproof layer 30 may not completely cover the surface of the fire detection needle body 10 in the axial direction of the fire detection needle body 10, thereby saving the material of the fireproof layer 30 and reducing the cost. That is, by setting the length of the fireproof layer 30 to be less than or equal to the length of the fire detection needle body 10, the fireproof layer 30 can effectively protect the fire detection needle body 10 in the axial direction of the fire detection needle body 10, thereby avoiding the problem of the fire detection needle body 10 being easily deformed along its axial direction.

[0071] It should be noted that, in the embodiment of the present application, the length of the fireproof layer 30 may be: the distance between the two opposite ends of the fireproof layer 30 along the axial direction of the fire detection needle body 10 .

[0072] In addition, in some embodiments, the fireproof layer 30 contacts the installation body 20, and the distance between the fireproof layer 30 and the end of the fire detection needle body 10 away from the installation body 20 is L, which satisfies: 5mm≤L≤10mm.

[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 detection needle body 10 away from the mounting body 20 is L, it is equivalent to that in the axial direction of the fire detection needle body 10, the length of the fireproof layer 30 is smaller than the length of the fire detection needle body 10, and the end of the fire detection needle body 10 away from the mounting body 20 is in an exposed state, so that the end of the fire detection 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 L between the fireproof layer 30 and the end of the fire detection needle body 10 away from the installation body 20, it can be ensured that in the axial direction of the fire detection needle body 10, the end of the fire detection needle body 10 away from the installation body 20 can effectively detect the flame, so that in the circumferential direction of the fire detection needle body 10, the fire detection needle body 10 has a surface that is not covered by the fireproof layer 30, and in the axial direction of the fire detection needle body 10, the end of the fire detection needle body 10 away from the installation body 20 is not covered by the fireproof layer 30. Therefore, under the premise of ensuring that the fire detection needle body 10 is effectively protected by the fireproof layer 30, the area of ​​the fire detection needle body 10 available for flame combustion is larger, thereby making the fire detection function of the fire detection needle body 10 better.

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

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

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

[0077] Since the thickness of the fireproof layer 30 is in the range of 0.5 to 2 mm, the thickness of the fireproof layer 30 can be made appropriate, so as to avoid the problem that the fireproof layer 30 is too thin, the fireproof layer 30 has a poor protective effect on the fire detection needle body 10, 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 thick, which leads to more fireproof materials and increased costs. That is, by setting the thickness of the fireproof layer 30 to be in the range of 0.5 to 2 mm, it is possible to save costs while 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 0.5 mm and 2 mm. For example, the thickness of the fireproof layer 30 is 0.5 mm. Another example is that the thickness of the fireproof layer 30 is 0.6 mm. Another example is that the thickness of the fireproof layer 30 is 0.7 mm. Another example is that the thickness of the fireproof layer 30 is 0.8 mm. Another example is that the thickness of the fireproof layer 30 is 0.9 mm. Another example is that the thickness of the fireproof layer 30 is 1.1 mm. Another example is that the thickness of the fireproof layer 30 is 1.3 mm. Another example is that the thickness of the fireproof layer 30 is 1.5 mm. Another example is that the thickness of the fireproof layer 30 is 1.7 mm. Another example is that the thickness of the fireproof layer 30 is 2 mm. The specific value of the thickness of the fireproof layer 30 is not limited in the embodiments of the present application. For example, Figure 6 As shown, the thickness of the fireproof layer 30 is Figure 6 As shown in B.

[0079] In addition, in some embodiments, the fire detection device of the gas water heater may 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 to 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 installation body 20 and connected to the fire detection needle body 10, after the fire detection device is applied to the gas water heater, the second end of the first connecting line 40 can be electrically connected to the controller of the gas water heater, so that the controller of the gas water heater can receive the flame ion current signal through the first connecting line 40, and then the controller can determine whether the fire detection needle body 10 is burned by the flame. That is, by setting the first connecting line 40, after the fire detection device is applied to the gas water heater, it is convenient to electrically connect the fire detection needle body 10 to the controller of the gas water heater, so that it is convenient for the controller to determine whether the fire detection needle body 10 is burned by the flame.

[0081] It should be noted that in actual applications, after the fire detection device is applied to the gas water heater, the controller can be electrically connected to the first connecting line 40, and the controller can provide voltage to the fire detection needle body 10. Once the flame burns the fire detection needle body 10, the flame is conductive, so that the current can be transmitted to the component that generates the flame, and the component that generates 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, thereby determining that the fire detection needle body 10 is burned by the flame.

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

[0083] In addition, in some embodiments, the fire detection device of the gas water heater may also include a second connecting wire 50; the first end of the second connecting wire 50 is located in the installation body 20 and is connected to the fire detection needle body 10, and the second connecting wire 50 is used to transmit the resistance value of the fire detection needle body 10.

[0084] Since the first end of the second connecting line 50 is located in the installation body 20 and is connected to the fire detection needle body 10, after the fire detection device is applied to the gas water heater, the second end of the second connecting line 50 can be electrically connected to the controller of the gas water heater, so that the controller of the gas water heater can receive the resistance value of the fire detection needle body 10 through the second connecting line 50, and then the controller can determine whether the fire detection needle body 10 is burned by the flame. That is, by setting the second connecting line 50, after the fire detection device is applied to the gas water heater, it is convenient to electrically connect the fire detection needle body 10 with the controller of the gas water heater, and after the fire detection needle body 10 fails to transmit the flame ion current signal through the first connecting line 40 to determine whether the gas water heater has a flame, the resistance value of the fire detection needle body 10 can be transmitted through the second connecting line 50, and then the controller determines whether there is a flame in the gas water heater based on the resistance value, so that the controller can determine whether there is a flame in the gas water heater more accurately.

[0085] It should be noted that, in actual applications, after the fire detection device is applied to the burner, the controller can be electrically connected to the second connecting line 50, and the controller can be electrically connected to the fire detection needle body 10. Among them, the fire detection needle body 10 can have a thermocouple function, and the fire detection needle body 10 will produce different resistance values ​​at different temperatures, so once the flame burns the fire detection needle body 10, the resistance value of the fire detection needle body 10 will change, and the resistance value of the fire detection needle 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 a flame in the gas water heater based on the resistance value of the fire detection needle body 10.

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

[0087] In addition, in some embodiments, the fire detection device of the gas water heater may further include a connection terminal 60; the first connection line 40 and the second connection line 50 are both connected to the connection terminal 60, and the connection terminal 60 is used to connect to the controller of the gas water heater.

[0088] Since the first connection line 40 and the second connection line 50 are both connected to the connection terminal 60, when the fire detection device is applied to the gas water heater, the connection terminal 60 can be directly electrically connected to the controller of the gas water heater, so that the first connection line 40 and the second connection line 50 are electrically connected to the controller of the gas water heater, which facilitates the controller to obtain the corresponding signal through the first connection line 40 and the second connection line 50. That is, by setting the connection terminal 60, the first connection line 40 and the second connection 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 the corresponding information of the fire detection needle body 10.

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

[0090] In the embodiment of the present application, since one end of the fire detection needle body 10 is fixed in the installation body 20, when the fire detection needle body 10 is installed in the gas water heater, the fire detection needle body 10 can be installed in the gas water heater through the installation body 20, and the installation body 20 can fix the fire detection needle body 10 in the gas water heater. Since the fire detection needle body 10 is provided with a fireproof layer 30, the fireproof layer 30 covers at least part of the surface of the fire detection needle body 10. Therefore, once the fire detection needle body 10 is installed in the gas water heater, the flame in the gas water heater can burn the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30, so that the fire detection needle body 10 can detect fire, and the existence of the fireproof layer 30 can fix the fire detection needle body 10, avoiding the problem of deformation of the fire detection needle body 10 due to long-term burning by flames. That is, in the embodiment of the present application, by providing a fireproof layer 30 on the fire detection needle body 10, and the fireproof layer 30 covers at least part of the surface of the fire detection needle body 10, after the fire detection needle body 10 is applied to the gas water heater, the surface of the fire detection needle body 10 not covered by the fireproof layer 30 can be burned by the flame, ensuring that the fire detection needle body 10 can have a fire detection function, and the fireproof layer 30 can ensure that the fire detection needle body 10 always maintains its initial state, avoiding the fire detection needle body 10 from being easily deformed after being burned, resulting in the fire detection function of the fire detection needle body 10 being affected, thereby avoiding the problem of the fire detection function of the fire detection needle body 10 failing. That is, in the embodiment of the present application, it can be effectively ensured that the fire detection needle body 10 is not easily deformed, thereby improving the fire detection performance of the fire detection needle body 10.

[0091] An embodiment of the present application provides a gas water heater, which includes a burner housing 100, a combustion monolithic chip 200, and a fire detection device of the gas water heater in any of the above embodiments.

[0092] The combustion monolithic chip 200 is arranged in the burner shell 100, the installation body 20 is arranged in the burner shell 100, and the fire detection needle body 10 is located in the burner shell 100, the fire detection needle body 10 is opposite to the combustion monolithic chip 200, and the partial surface of the fire detection needle body 10 not covered by the fireproof layer 30 faces the burner monolithic chip.

[0093] In the embodiment of the present application, since one end of the fire detection needle body 10 is fixed in the installation body 20, and the installation body 20 is arranged in the burner shell 100, the fire detection needle body 10 is installed in the gas water heater through the installation body 20, and the installation body 20 can fix the fire detection needle body 10 in the gas water heater. Since a fireproof layer 30 is provided on the fire detection needle body 10, the fireproof layer 30 covers at least a portion of the surface of the fire detection needle body 10, and the combustion single piece 200 is arranged in the burner shell 100, the fire detection needle body 10 is located in the burner shell 100, the fire detection needle body 10 is opposite to the combustion single piece 200, and the portion of the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30 faces the burner single piece. Therefore, once the combustion single piece 200 generates a flame, the flame can burn the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30, so that the fire detection needle body 10 can detect fire, and the existence of the fireproof layer 30 can fix the fire detection needle body 10 to avoid the problem of deformation of the fire detection needle body 10 caused by long-term burning by flames. That is, in the embodiment of the present application, a fireproof layer 30 is provided on the fire detection needle body 10, and the fireproof layer 30 covers at least a portion of the surface of the fire detection needle body 10, so that the surface of the fire detection needle body 10 not covered by the fireproof layer 30 can be burned by the flame, ensuring that the fire detection needle body 10 can have a fire detection function, and the fireproof layer 30 can ensure that the fire detection needle body 10 always maintains its initial state, thereby preventing the fire detection needle body 10 from being easily deformed after being burned, causing the fire detection function of the fire detection needle body 10 to be affected, thereby preventing the fire detection function of the fire detection needle body 10 from failing, thereby reducing the failure rate of the gas water heater and extending the service life of the gas water heater.

[0094] It should be noted that a mounting hole may be provided on the burner housing 100 , and the mounting body 20 may be installed in the mounting hole, so that the spark detection needle body 10 is located in the burner housing 100 .

[0095] In addition, in an embodiment of the present application, the gas water heater may further include a fire detection needle fixing plate 400, which is fixed to the burner housing 100, and the fire detection needle fixing plate 400 is fixedly connected to the installation body 20, so that the fire detection needle body 10 is fixed by the fire detection needle fixing plate 400.

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

[0097] Since the ignition needle 300 is disposed in the burner housing 100, when the gas water heater needs to have a flame, the ignition needle 300 can be used to ignite the combustion monolithic plate 200, thereby generating a flame. That is, by providing the ignition needle 300, the gas water heater can be easily ignited.

[0098] In addition, in an embodiment of the present application, the gas water heater may further include an ignition fixing plate 500, which is fixed on the burner housing 100, and the ignition needle 300 is fixedly connected to the ignition fixing plate 500, so that the ignition needle 300 is fixed by the ignition fixing plate 500, thereby avoiding the problem of the ignition needle 300 being easy to shake.

[0099] In addition, in actual applications, the fire detection needle body 10 can be located above the burning single piece 200, and the fire detection needle body 10 and the burning single piece 200 are spaced apart, so that once the burning single piece 200 generates flames, the flames can burn the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30.

[0100] In the embodiment of the present application, since one end of the fire detection needle body 10 is fixed in the installation body 20, and the installation body 20 is arranged in the burner shell 100, the fire detection needle body 10 is installed in the gas water heater through the installation body 20, and the installation body 20 can fix the fire detection needle body 10 in the gas water heater. Since a fireproof layer 30 is provided on the fire detection needle body 10, the fireproof layer 30 covers at least a portion of the surface of the fire detection needle body 10, and the combustion single piece 200 is arranged in the burner shell 100, the fire detection needle body 10 is located in the burner shell 100, the fire detection needle body 10 is opposite to the combustion single piece 200, and the portion of the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30 faces the burner single piece. Therefore, once the combustion single piece 200 generates a flame, the flame can burn the surface of the fire detection needle body 10 that is not covered by the fireproof layer 30, so that the fire detection needle body 10 can detect fire, and the existence of the fireproof layer 30 can fix the fire detection needle body 10 to avoid the problem of deformation of the fire detection needle body 10 caused by long-term burning by flames. That is, in the embodiment of the present application, a fireproof layer 30 is provided on the fire detection needle body 10, and the fireproof layer 30 covers at least a portion of the surface of the fire detection needle body 10, so that the surface of the fire detection needle body 10 not covered by the fireproof layer 30 can be burned by the flame, ensuring that the fire detection needle body 10 can have a fire detection function, and the fireproof layer 30 can ensure that the fire detection needle body 10 always maintains its initial state, thereby preventing the fire detection needle body 10 from being easily deformed after being burned, causing the fire detection function of the fire detection needle body 10 to be affected, thereby preventing the fire detection function of the fire detection needle body 10 from failing, thereby reducing the failure rate of the gas water heater and extending the service life of the gas water heater.

[0101] The embodiment of the present application provides a fire detection control method, which is applied to the gas water heater in any of the above embodiments, 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 mode is a temperature monitoring fire detection mode; Fig.11 As shown, the fire detection control method includes:

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

[0103] Among them, 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 to the first connecting line, and the controller can provide voltage to the fire detection needle body, so that once the flame burns the fire detection needle body, the flame has conductivity, so that the current can be transmitted to the flame-generating component, and the flame-generating component 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, thereby determining that the fire detection needle body is burned by the flame, and then determining that there is a flame in the gas water heater. That is, when the gas water heater is in the first detection mode, the controller needs to receive current to determine whether there is a flame in the gas water heater.

[0104] In addition, in some implementations, step 1101 may be implemented by: detecting the current value transmitted from the spark detection needle body; if the current value is within a preset current range, determining that the first detection mode is normal; 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 by the fire 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 is burning normally in 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 fail, 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, and the specific range value of the preset current range is not limited in the embodiment of the present application.

[0107] Step 1102: When the first detection mode is abnormal, control the gas water heater to switch from the first detection mode to the second detection mode.

[0108] Among them, 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 can be detected through the second detection mode, so that the gas water heater can detect the flame more accurately and ensure that the service life of the gas water heater is extended, avoiding the problem of users having to repair or replace the gas water heater after the first detection mode fails, which leads to increased user costs.

[0109] Step 1103: Monitor the resistance value of the fire detection needle body, and determine whether the gas water heater has a flame based on the resistance value of the fire detection needle body.

[0110] Among them, the fire detection needle body can have a thermocouple function, and the fire detection needle body will produce different resistance values ​​at different temperatures. Therefore, once the flame burns the fire detection needle body, the resistance value of the fire detection needle body will change, and the resistance value of the fire detection needle body can be transmitted to the controller of the gas water heater through the second connecting line, so that the controller can monitor the resistance value of the fire detection needle body, and then the controller can determine whether there is a flame in the gas water heater based on the resistance value of the fire detection needle body.

[0111] In addition, in some implementations, the implementation method for determining whether the gas water heater has a flame based on the resistance value of the fire detection needle body can be: converting the resistance value of the fire detection needle body into a temperature value; determining whether the temperature value is greater than a preset temperature threshold; when the temperature value is greater than or equal to the preset temperature threshold, determining that the gas water heater has a flame; when the temperature value is less than the preset temperature threshold, determining that the gas water heater has no flame.

[0112] Among them, the controller can convert the resistance value of the fire detection needle body into a temperature value, so that the controller can compare the temperature value with a preset temperature threshold. Once the temperature value is greater than or equal to the preset temperature threshold, it indicates that there is a flame in the gas water heater. Once the temperature value is less than the preset temperature threshold, it indicates that there is no flame in the gas water heater.

[0113] It should be noted that when converting the resistance value to the temperature value, the conversion can be performed based on the corresponding relationship between the resistance value and the temperature value. In the corresponding relationship between the resistance value and the temperature value, one resistance value corresponds to one temperature value, so once the controller detects the resistance value of the spark detector body, the temperature value can be directly determined, and then the relationship between the temperature value and the preset temperature threshold can be determined.

[0114] In addition, in the embodiment of the present application, the preset temperature threshold can be any value between 60 and 200° C. For example, the preset temperature threshold is 60° C., another example, the preset temperature threshold is 80° C., another example, the preset temperature threshold is 100° C., another example, the preset temperature threshold is 120° C., another example, the preset temperature threshold is 160° C., and another example, the preset temperature threshold is 200° C. This embodiment of the present application is not limited here.

[0115] In the embodiment of the present application, by determining whether the first detection mode is normal; when the first detection mode is abnormal, 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 a flame based on the resistance value of the fire detection needle body. That is, in the embodiment 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 the resistance value of the fire detection needle body can be used to determine whether the gas water heater has a flame, thereby making the flame detection in the gas water heater more accurate.

[0116] Alternatively, if Fig.12 As shown, an embodiment of the present application further provides an electronic device 1200, including a processor 1201 and a memory 1202, wherein the memory 1202 stores programs or instructions that can be executed on the processor 1201, and when the program or instructions are executed by the processor 1201, the various steps of the above-mentioned fire detection control method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0117] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0118] Fig.13 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0119] The electronic device 1200 includes but is not limited to components such as a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, and a processor 110.

[0120] Those skilled in the art will appreciate that the electronic device 1200 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 110 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.13 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0121] Among them, the processor 110 is used to determine whether the first detection mode is normal; when the first detection mode is abnormal, control the gas water heater to switch from the first detection mode to the second detection mode; monitor the resistance value of the fire detection needle body, and determine whether the gas water heater has a flame based on the resistance value of the fire detection needle body.

[0122] In the embodiment of the present application, by determining whether the first detection mode is normal; when the first detection mode is abnormal, 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 a flame based on the resistance value of the fire detection needle body. That is, in the embodiment 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 the resistance value of the fire detection needle body can be used to determine whether the gas water heater has a flame, thereby making the flame detection in the gas water heater more accurate.

[0123] Optionally, the processor 110 is also used to convert the resistance value of the fire detection needle body into a temperature value; determine whether the temperature value is greater than a preset temperature threshold; when the temperature value is greater than or equal to the preset temperature threshold, determine that the gas water heater has a flame; when the temperature value is less than the preset temperature threshold, determine that the gas water heater has no flame.

[0124] Optionally, the processor 110 is also used to detect the current value transmitted from the fire detection 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.

[0125] In the embodiment of the present application, by determining whether the first detection mode is normal; when the first detection mode is abnormal, 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 a flame based on the resistance value of the fire detection needle body. That is, in the embodiment 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 the resistance value of the fire detection needle body can be used to determine whether the gas water heater has a flame, thereby making the flame detection in the gas water heater more accurate.

[0126] It should be understood that in the embodiment of the present application, the input unit 104 may include a graphics processor (Graphics Processing Unit, GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 107 includes a touch panel 1071 and at least one of other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0127] The memory 109 can be used to store software programs and various data. The memory 109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 109 may include a volatile memory or a non-volatile memory, or the memory 109 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0128] The processor 110 may include one or more processing units; optionally, the processor 110 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 110.

[0129] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned fire detection control method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

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

[0131] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned fire detection control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0132] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0133] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned fire detection control method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0134] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may 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 will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fire detection device for a gas water heater, characterized 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 installation body, and the installation body is used to fix the fire detection needle body in the gas water heater; The fire detection needle body is provided with a fireproof layer, which covers at least a portion of the surface of the fire detection needle body. The portion of the surface of the fire detection needle body not covered by the fireproof layer is used for flame combustion and flame detection.

2. The fire detection device for a gas water heater according to claim 1, characterized in that: Along the circumferential direction of the fire detection body, the circumference of the fire protection layer is greater than or equal to half of the circumference of the fire detection needle body, and the circumference of the fire protection layer is smaller than the circumference of the fire detection needle body.

3. The fire detection device for a gas water heater according to claim 2, characterized in that: Along the axial direction of the fire detection needle body, the length of the fire protection layer is less than or equal to the length 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 installation body to the installation body.

4. The fire detection device for a gas water heater according to claim 3, characterized in that: The fireproof layer contacts the installation body, and the distance between the fireproof layer and one end of the fire detection needle body away from the installation body is L, which satisfies: 5mm≤L≤10mm.

5. The fire detection device for a gas water heater according to claim 1, characterized in that: The thickness of the fireproof layer ranges from 0.5 to 2 mm.

6. The fire detection device for a gas water heater according to claim 1, characterized in that: The fire detection device of the gas water heater also includes a first connecting line; The first end of the first connecting line is located in the installation body and connected to the fire detection needle body. The first connecting line is used to transmit the flame ion current signal.

7. The fire detection device for a gas water heater according to claim 6, characterized in that: The fire detection device of the gas water heater also includes a second connecting line; The first end of the second connecting line is located in the installation body and connected to the fire detection needle body, and the second connecting line is used to transmit the resistance value of the fire detection needle body.

8. The fire detection device for a gas water heater according to claim 7, characterized in that: The fire detection device of the gas water heater also includes 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 to connect to a controller of the gas water heater.

9. A gas water heater, characterized in that: The gas water heater comprises a burner housing, a combustion monolithic plate and a fire detection device of the gas water heater according to any one of claims 1 to 8; The combustion monolithic piece is arranged in the burner shell, the mounting body is arranged in the burner shell, and the fire detection needle body is located in the burner shell, the fire detection needle body is opposite to the combustion monolithic piece, and the partial surface of the fire detection needle body not covered by the fireproof layer faces the burner monolithic piece.

10. The gas water heater according to claim 9, characterized in that: The gas water heater also includes an ignition needle; The ignition needle is arranged in the burner housing, and the ignition needle is used for ignition.

11. A fire detection control method, characterized in that: Applicable to the gas water heater according to any one of claims 9 to 10, the gas water heater has a first detection mode and a second detection mode, the first detection mode is a flame ion current detection mode, and the second mode is a temperature monitoring detection mode; The fire detection control method comprises: Determining whether the first detection mode is normal; When the first detection mode is abnormal, controlling the gas water heater to switch from the first detection mode to the second detection mode; The resistance value of the fire detection needle body is monitored, and whether the gas water heater has a flame is determined based on the resistance value of the fire detection needle body.

12. The fire detection control method according to claim 11, characterized in that: The step of determining whether the gas water heater has a flame based on the resistance value of the fire detection needle body comprises: Converting the resistance value of the fire detection needle body into a temperature value; Determining whether the temperature value is greater than a preset temperature threshold; When the temperature value is greater than or equal to the preset temperature threshold, it is determined that the gas water heater has flame; when the temperature value is less than the preset temperature threshold, it is determined that the gas water heater has no flame.

13. The fire detection control method according to claim 11, characterized in that: The determining whether the first detection mode is normal includes: detecting a current value transmitted from the spark detector body; If the current value is within the 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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