Gas stove

Abstract

The gas stove comprises a combustor, a gas valve, an ignition needle and an induction needle, the combustor comprises fire covers, the fire covers comprise the first fire cover and the second fire cover, the first fire cover surrounds the second fire cover, the first fire cover is provided with outer ring fire holes and middle ring fire holes, and the second fire cover is provided with inner ring fire holes; the gas valve is provided with a first gas outlet channel and a second gas outlet channel, the outer ring fire hole communicates with the second gas outlet channel, the middle ring fire hole and the inner ring fire hole communicate with the first gas outlet channel, the gas valve is suitable for providing the minimum flow through the first gas outlet channel when the second gas outlet channel is closed, and the ignition needle is arranged between the first fire cover and the second fire cover. The induction needle is arranged between the first fire cover and the second fire cover.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a gas stove. Background Technology

[0002] A gas stove consists of a burner and a gas valve. The gas valve controls the amount of gas flowing to the burner. Most burners currently on the market are two-ring burners, which require a two-ring gas valve. Three-ring burners have appeared on the market, which require a three-ring gas valve. However, the structure of a three-ring gas valve is more complex and the cost is higher than that of a two-ring gas valve. In addition, there are certain difficulties in how to match the ignition needle and sensing needle of a three-ring burner. Summary of the Invention

[0003] This application aims to at least partially solve one of the technical problems in the related art. To this end, this application proposes a gas stove.

[0004] To achieve the above objectives, this application discloses a gas stove, which includes:

[0005] The burner includes a flame cap, which includes a first flame cap and a second flame cap. The first flame cap surrounds the second flame cap. The first flame cap has an outer ring flame hole and a middle ring flame hole. The second flame cap has an inner ring flame hole.

[0006] A gas valve is provided with a first gas outlet channel and a second gas outlet channel. The outer ring flame hole is connected to the second gas outlet channel, and the middle ring flame hole and the inner ring flame hole are respectively connected to the first gas outlet channel. The gas valve is adapted to provide a minimum flow rate through the first gas outlet channel when the second gas outlet channel is closed.

[0007] An ignition needle is disposed between the first and second flame caps; and

[0008] The sensing needle is located between the first flame cap and the second flame cap.

[0009] In some embodiments of this application, the gas stove includes a three-way connector, the first gas outlet channel is connected to the first end of the three-way connector, the middle ring burner hole is connected to the second end of the three-way connector, and the inner ring burner hole is connected to the third end of the three-way connector.

[0010] In some embodiments of this application, the outer ring flame hole is adapted to supply gas and blower air for ejection, the middle ring flame hole is adapted to supply gas and ejector air for ejection, and the inner ring flame hole is adapted to supply gas and ejector air for ejection.

[0011] In some embodiments of this application, the flame generated by the middle ring fire hole is suitable for stabilizing the flame of the outer ring fire hole.

[0012] In some embodiments of this application, the outer ring flame hole is inclined from bottom to top away from the center of the flame cap, and the middle ring flame hole is inclined from bottom to top away from the center of the flame cap. The outer ring flame hole and the middle ring flame hole are exposed from the flame cap in a top-to-bottom direction.

[0013] In some embodiments of this application, the first flame cap is a metal flame cap, and the second flame cap includes an infrared flame cap, wherein the infrared flame cap is provided with the inner ring flame hole.

[0014] In some embodiments of this application, the burner includes a burner head, a first ejector tube, a second ejector tube, a third ejector tube, and a blower. The burner head is provided with a first cavity, a second cavity, and a third cavity. The burner cap is disposed on the burner head. The outer ring flame hole communicates with the first cavity, the middle ring flame hole communicates with the second cavity, and the inner ring flame hole communicates with the third cavity. The first ejector tube communicates with the first cavity and is adapted to receive blown air from the blower when receiving fuel gas from the second exhaust channel. The second ejector tube communicates with the second cavity and is adapted to eject air when receiving fuel gas from the first exhaust channel. The third ejector tube communicates with the third cavity and is adapted to eject air when receiving fuel gas from the first exhaust channel.

[0015] In some embodiments of this application, the first cavity surrounds the second cavity, and the second cavity surrounds the third cavity.

[0016] In some embodiments of this application, the inner wall of the first flame cap is provided with a first flame hole communicating with the second cavity. The first flame hole is lower than the middle ring flame hole, and a portion of the ignition needle and a portion of the sensing needle are located in the opening direction of the first flame hole.

[0017] In some embodiments of this application, the first flame cap covers the ignition needle and the sensing needle from the outside to the inside along the radial direction of the flame cap, and the second flame cap covers the ignition needle and the sensing needle from the top to the bottom along the axial direction of the flame cap.

[0018] In some embodiments of this application, the ignition needle and the sensing needle constitute an ignition sensing needle.

[0019] Other advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other designs can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the burner and gas valve connection in some embodiments.

[0022] Figure 2 Schematic diagram of the burner in some embodiments;

[0023] Figure 3 Schematic diagram of the burner in some embodiments (view and perspective) Figure 2 different);

[0024] Figure 4 Exploded views of the burner in some embodiments;

[0025] Figure 5 for Figure 4 Enlarged view marked A in the middle;

[0026] Figure 6 Another exploded view of the burner in some embodiments;

[0027] Figure 7 Cross-sectional views of the burner in some embodiments;

[0028] Figure 8 for Figure 7 Enlarged view marked B.

[0029] Explanation of icon numbers:

[0030] Burner 1000, burner cap 1100, first burner cap 1110, second burner cap 1120, infrared burner cap 1121, outer ring burner hole 1131, middle ring burner hole 1132, inner ring burner hole 1133, first burner hole 1140, burner head 1200, first cavity 1210, second cavity 1220, third cavity 1230, first ejector tube 1310, second ejector tube 1320, third ejector tube 1330, gas valve 2000, first gas outlet channel 2100, second gas outlet channel 2200, ignition needle 3100, sensing needle 3200, three-way connector 3300.

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

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

[0034] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0036] This application discloses a gas stove, combined with Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, the gas stove includes a burner 1000, a gas valve 2000, an ignition needle 3100, and a sensing needle 3200. The burner 1000 includes a flame cap 1100, which includes a first flame cap 1110 and a second flame cap 1120. The first flame cap 1110 surrounds the second flame cap 1120 and is provided with an outer ring flame hole 1131 and a middle ring flame hole 1132. The second flame cap 1120 is provided with an inner ring flame hole 1133. The gas valve 2000 is provided with a first gas outlet channel 2100 and a second gas outlet channel 2200. The outer ring burner hole 1131 is connected to the second gas outlet channel 2200. The gas output from the second gas outlet channel 2200 can be ejected from the outer ring burner hole 1131. The middle ring burner hole 1132 is connected to the first gas outlet channel 2100. The inner ring burner hole 1133 is connected to the first gas outlet channel 2100. The gas output from the first gas outlet channel 2100 can be ejected from the middle ring burner hole 1132 and the inner ring burner hole 1133. The ignition needle 3100 is located between the first burner cap 1110 and the second burner cap 1120. The sensing needle 3200 is located between the first burner cap 1110 and the second burner cap 1120.

[0037] Specifically, the first flame cap 1110 is provided with an outer ring flame hole 1131 and a middle ring flame hole 1132, and the second flame cap 1120 is provided with an inner ring flame hole 1133. The outer ring flame hole 1131, the middle ring flame hole 1132, and the inner ring flame hole 1133 are respectively located further outward than the middle ring flame hole 1132 and the inner ring flame hole 1133, and the inner ring flame hole 1133 is located further inward than the outer ring flame hole 1131 and the middle ring flame hole 1132. The middle ring flame hole 1132 is located between the outer ring flame hole 1131 and the inner ring flame hole 1133. Thus, along the direction away from the center of the flame cap 1100, the inner ring flame hole 1133, the middle ring flame hole 1132, and the outer ring flame hole 1131 are arranged in sequence. It is understandable that the outer ring flame hole 1131, the middle ring flame hole 1132, and the inner ring flame hole 1133 are flow channel structures for gas ejection, and can be round, square, slit-shaped, or other shapes, for example... Figure 4 and Figure 5 In the burner 1000 shown, the outer ring flame holes 1131 are round holes, and multiple outer ring flame holes 1131 are arranged in a ring and surround the middle ring flame holes 1132. The middle ring flame holes 1132 are slit-shaped. The inner ring flame holes 1133 are round holes, and multiple inner ring flame holes 1133 are densely arranged. "Multiple" means two or more.

[0038] Gas needs to be introduced into the burner 1000 and ejected from the corresponding outer ring flame port 1131, middle ring flame port 1132, and inner ring flame port 1133 to be ignited and form a flame. The gas supply to the burner 1000 is provided through the gas valve 2000. To achieve the gas supply to the outer ring flame port 1131, middle ring flame port 1132, and inner ring flame port 1133, a three-ring gas valve is used in related technologies. The three-ring gas valve includes a valve core and a valve seat. The valve core is rotatably mounted within the valve seat, which has three outlet channels. The valve core and valve seat need to have a corresponding mating structure for the three outlet channels. The gas output from the three outlet channels is controlled through the mating of the valve core and valve seat. However, the three-ring gas valve has a complex structure and high cost. Therefore, in this embodiment, the gas valve 2000 has two outlet channels, forming a two-ring gas valve. The structure of the two-ring gas valve is simpler and less expensive than that of the three-ring gas valve.

[0039] The gas valve 2000 in this embodiment includes a first gas outlet channel 2100 and a second gas outlet channel 2200, thus forming a two-ring gas valve. The gas valve 2000 can provide the maximum flow rate (referring to the gas flow rate) by opening the first gas outlet channel 2100 and the second gas outlet channel 2200. The gas valve 2000 can provide the minimum flow rate (referring to the gas flow rate) by opening the first gas outlet channel 2100 and closing the second gas outlet channel 2200. When the gas valve 2000 provides the maximum flow rate, the burner 1000 is in the maximum fire state. When the gas valve 2000 provides the minimum flow rate, the burner 1000 is in the minimum fire state. The outer ring burner hole 1131 is connected to the second exhaust passage 2200. The gas output from the second exhaust passage 2200 enters the burner 1000 and is ejected from the outer ring burner hole 1131. The middle ring burner hole 1132 and the inner ring burner hole 1133 are connected to the first exhaust passage 2100. The gas output from the first exhaust passage 2100 enters the burner 1000 and is ejected from the middle ring burner hole 1132 and the inner ring burner hole 1133, respectively. When the burner 1000 is at maximum flame, the gas output from the first exhaust passage 2100 is ejected from the middle ring burner hole 1132 and the inner ring burner hole 1133, and the gas output from the second exhaust passage 2200 is ejected from the outer ring burner hole 1131. When the burner 1000 is at minimum flame, the second exhaust passage 2200 is closed, and the gas output from the first exhaust passage 2100 is ejected from the middle ring burner hole 1132 and the inner ring burner hole 1133. Therefore, this embodiment can achieve gas supply to the three-ring burner by using a two-ring gas valve without using a three-ring gas valve, thus reducing costs.

[0040] Understandably, after the gas is ejected, it needs to be ignited by the ignition needle 3100, and the resulting flame needs to contact the sensing needle 3200. Placing the ignition needle 3100 and the sensing needle 3200 between the first burner cap 1110 and the second burner cap 1120 provides a certain degree of protection for the ignition needle 3100 and the sensing needle 3200, reducing the probability of the ignition needle 3100 and the sensing needle 3200 being bumped by the outside world.

[0041] There are several ways to connect the middle ring burner port 1132 and the inner ring burner port 1133 to the first gas outlet channel 2100, and the outer ring burner port 1131 to the second gas outlet channel 2200. For example, the first gas outlet channel 2100 has two connectors. One connector is connected to the burner 1000 via a gas supply pipe and is connected to the middle ring burner port 1132. The other connector is connected to the burner 1000 via a gas supply pipe and is connected to the inner ring burner port 1133. This solution requires modification of the first gas outlet channel 2100 to form two connectors (common two-ring gas valves have one connector for each gas outlet channel). In some embodiments, combined with... Figure 1 As shown, the gas stove includes a three-way connector 3300, which has a first end, a second end, and a third end. The first end, the second end, and the third end are interconnected. The first end is connected to the first gas outlet channel 2100 (e.g., through a gas supply pipe), the second end is connected to the middle ring burner hole 1132 (e.g., through a gas supply pipe), and the third end is connected to the inner ring burner hole 1133 (e.g., through a gas supply pipe). In this way, the gas output from the first gas outlet channel 2100 flows to the three-way connector 3300 and is split, thus flowing to the middle ring burner hole 1132 and the inner ring burner hole 1133. Gas supply to the middle ring burner hole 1132 and the inner ring burner hole 1133 can be achieved without modifying the first gas outlet channel 2100 to have two connectors.

[0042] In some embodiments, the outer ring burner 1131 is used to supply blown air and gas, the middle ring burner 1132 is used to supply ejected air and gas, and the inner ring burner 1133 is used to supply ejected air and gas. The gas valve 2000 controls the gas supply to the outer ring burner 1131, the middle ring burner 1132, and the inner ring burner 1133. The ejected air is obtained by simultaneously ejecting air during the gas supply process, and the blown air is generated by a fluid device.

[0043] Specifically, the outer ring flame port 1131 is used to supply blown air and gas for injection. The blown air and gas enter the interior of the burner 1000, and then are ejected from the interior of the burner 1000 through the outer ring flame port 1131, where they are ignited to form a flame. The gas comes from bottled liquefied petroleum gas or pipeline natural gas. The gas output from the second gas outlet channel 2200 of the gas valve 2000 is ejected through a nozzle. The gas ejected from the nozzle is injected into the interior of the burner 1000. During the process of the gas being injected into the interior of the burner 1000, blown air is supplied. The blown air is generated by fluid machinery, such as by forced air supply from a blower. The blown air and gas enter the interior of the burner 1000 (the blown air is primary air). After the blown air and gas mix inside the burner 1000, they are ejected from the outer ring flame port 1131 and then ignited to form a flame.

[0044] The central ring flame hole 1132 is used to supply the ejector air and gas. The ejector air and gas enter the interior of the burner 1000 and are then ejected from the interior of the burner 1000 through the central ring flame hole 1132, where they are ignited to form a flame. The gas source is bottled liquefied petroleum gas or pipeline natural gas. The gas output from the first gas outlet channel 2100 of the gas valve 2000 is ejected through the nozzle. The gas ejected from the nozzle is injected into the interior of the burner 1000. During the process of the gas being injected into the interior of the burner 1000, air is simultaneously ejected. For details on air ejection, please refer to relevant technologies. Generally, it is based on the Venturi principle. During the process of the gas being injected into the interior of the burner 1000, a negative pressure is formed in the surrounding environment, causing the surrounding air to be simultaneously ejected into the interior of the burner 1000 along with the gas injection (this part of the air that enters the interior of the burner 1000 through the ejection action is called the ejected air, which is the primary air). After the ejected air and the gas are mixed inside the burner 1000, they are ejected from the central ring flame hole 1132 and then ignited to form a flame.

[0045] The inner ring flame hole 1133 is used to inject air and gas. The injecting air and gas enter the interior of the burner 1000 and are then ejected from the interior of the burner 1000 through the inner ring flame hole 1133, where they are ignited to form a flame. The gas source is bottled liquefied petroleum gas or pipeline natural gas. The gas output from the first gas outlet channel 2100 of the gas valve 2000 is ejected through the nozzle. The gas ejected from the nozzle is injected into the interior of the burner 1000. During the process of the gas being injected into the interior of the burner 1000, air is simultaneously ejected. For details on air ejection, please refer to relevant technologies. Generally, it is based on the Venturi principle. During the process of the gas being injected into the interior of the burner 1000, a negative pressure is formed in the surrounding environment, causing the surrounding air to be simultaneously ejected into the interior of the burner 1000 along with the gas injection (this part of the air that enters the interior of the burner 1000 through the ejection action is called the ejected air, which is the primary air). After the ejected air and the gas are mixed inside the burner 1000, they are ejected from the inner ring flame hole 1133 and then ignited to form a flame.

[0046] Compared to ejected air, forced air provides more oxygen, which allows the gas ejected from the outer ring flame hole 1131 to be in a rich oxygen combustion state, thus ensuring the complete combustion of the gas ejected from the outer ring flame hole 1131 (the flame generated by the outer ring flame hole 1131 can still entrain secondary air from the surrounding environment to participate in combustion).

[0047] When the ejector air from the middle ring burner 1132 is insufficient to support the combustion of the gas ejected from the middle ring burner 1132, secondary air replenishment is required. Since the outer ring burner 1131 ejects forced air, the forced air ejected from the outer ring burner 1131 can provide enough oxygen. This allows the forced air ejected from the outer ring burner 1131 to not only participate in the combustion of the gas ejected from the outer ring burner 1131, but also to provide excess oxygen to replenish the gas ejected from the middle ring burner 1132, assisting in the combustion of the gas ejected from the middle ring burner 1132. Compared to relying on entrainment to replenish secondary air from the surrounding environment, the excess oxygen provided by the forced air ejected from the outer ring burner 1131 is more actively replenished to the gas ejected from the middle ring burner 1132. Through this setting, the gas ejected from the middle ring burner 1132 can be fully combusted (in this case, the flame generated by the middle ring burner 1132 can still entrain secondary air from the surrounding environment to participate in combustion).

[0048] When the ejector air from the inner ring burner hole 1133 is insufficient to support the combustion of the gas ejected from the inner ring burner hole 1133, secondary air replenishment is required. Since the outer ring burner hole 1131 ejects forced air, the forced air ejected from the outer ring burner hole 1131 can provide enough oxygen. This allows the forced air ejected from the outer ring burner hole 1131 to not only participate in the combustion of the gas ejected from the outer ring burner hole 1131, but also to provide excess oxygen to replenish the gas ejected from the inner ring burner hole 1133, assisting in the combustion of the gas ejected from the inner ring burner hole 1133. Compared to relying on entrainment to replenish secondary air from the surrounding environment, the excess oxygen provided by the forced air ejected from the outer ring burner hole 1131 is more actively replenished to the gas ejected from the inner ring burner hole 1133. Through this setting, the gas ejected from the inner ring burner hole 1133 is fully combusted (in this case, the flame generated by the inner ring burner hole 1133 can still entrain secondary air from the surrounding environment to participate in combustion).

[0049] For example, combining Figures 1 to 3As shown, the burner 1000 includes a burner head 1200, a first ejector tube 1310, a second ejector tube 1320, a third ejector tube 1330, and a blower (not shown in the figure). The burner head 1200 is provided with a first cavity 1210, a second cavity 1220, and a third cavity 1230. The first cavity 1210 can surround the second cavity 1220, and the second cavity 1220 can surround the third cavity 1230, such that the third cavity 1230, the second cavity 1220, and the first cavity 1210 are arranged sequentially from the inside to the outside. The burner cap 1100 covers the burner head 1200, thereby enclosing the first cavity 1210, the second cavity 1220, and the third cavity 1230. This allows the outer ring burner hole 1131 to communicate with the first cavity 1210, the middle ring burner hole 1132 to communicate with the second cavity 1220, and the inner ring burner hole 1133 to communicate with the third cavity 1230. One end of the first ejector tube 1310 is connected to the first cavity 1210, one end of the second ejector tube 1320 is connected to the second cavity 1220, and one end of the third ejector tube 1330 is connected to the third cavity 1230. The other end of the first ejector tube 1310 is connected to the second gas outlet channel 2200, the other end of the second ejector tube 1320 is connected to the first gas outlet channel 2100, and the other end of the third ejector tube 1330 is connected to the first gas outlet channel 2100. The gas output from the first gas outlet channel 2100 is directed to the second ejector tube 1320 and ejected, simultaneously drawing in ambient air. The ejected air and gas enter the second cavity 1220 through the second ejector tube 1320 and are then ejected from the middle ring flame hole 1132. The gas output from the first gas outlet channel 2100 is also directed to the third ejector tube 1330 and ejected, simultaneously drawing in ambient air. The ejected air and gas enter the third cavity 1230 through the third ejector tube 1330 and are then ejected from the inner ring flame hole 1133. The gas output from the second gas outlet channel 2200 is directed to the first ejector tube 1310 and ejected, simultaneously drawing in the blower air supplied by the fan. Thus, the blower air and gas enter the first cavity 1210 through the first ejector tube 1310 and are then ejected from the outer ring flame hole 1131. The blower can continue to start after the gas stove is ignited, thereby continuously providing blown air. Whether the burner 1000 is in the minimum or maximum fire state, it can still participate in combustion by spraying blown air through the outer ring flame hole 1131.

[0050] In some embodiments, the flame generated by the central ring flame port 1132 is suitable for stabilizing the flame of the outer ring flame port 1131. Specifically, the outer ring flame port 1131 ejects forced-air and fuel gas. The inventors discovered that although forced-air can achieve complete combustion of the fuel gas, the force of the forced-air results in a relatively high gas velocity ejected from the outer ring flame port 1131. The velocity of the fuel gas leaving the outer ring flame port 1131 is greater than the combustion velocity, which easily leads to flame lift-off. However, since the central ring flame port 1132 ejects ejected air and fuel gas, the ejected air is naturally ejected by injecting fuel gas through a nozzle, without the need for fluid mechanical generation. The velocity of the fuel gas leaving the central ring flame port 1132 is not much different from the combustion velocity, achieving stable combustion. That is, the flame state formed by the central ring flame port 1132 is stable. Because the flame formed by the central ring flame port 1132 is more stable, it can be used to stabilize the flame of the outer ring flame port 1131.

[0051] In other words, besides heating the cookware, the flame formed by the middle ring burner 1132 also functions as a flame stabilizer / flame stabilizer. In short, because the middle ring burner 1132 supplies ignited air and fuel gas, the fuel gas emitted from it has a more stable combustion state. By adjusting the position, angle, or distance between the middle ring burner 1132 and the outer ring burner 1131, the flame formed by the middle ring burner 1132 can ignite the fuel gas emitted from the outer ring burner 1131 (e.g., the flame formed by the middle ring burner 1132 heats the root of the fuel gas emitted from the outer ring burner 1131, thus igniting the outer ring burner). The gas ejected from the outer ring burner hole 1131 is ignited by the flame formed by the middle ring burner hole 1132 when it rapidly leaves the outer ring burner hole 1131. This causes the gas that rapidly leaves the outer ring burner hole 1131 to burn at the outer ring burner hole 1131, thereby suppressing the phenomenon of flame lift-off from the outer ring burner hole 1131 and stabilizing the flame at the outer ring burner hole 1131, further improving the combustion efficiency. For example, the radial distance between the middle ring burner hole 1132 and the outer ring burner hole 1131 along the burner cap 1100 is no more than 5mm, and the axial distance along the burner cap 1100 is no more than 5mm. This causes the middle ring burner hole 1132 and the outer ring burner hole 1131 to move closer together to achieve flame stabilization.

[0052] Combination Figure 7 and Figure 8As shown, in some embodiments, the central ring burner hole 1132 is inclined upwards away from the center of the burner cap 1100, and the outer ring burner hole 1131 is also inclined upwards away from the center of the burner cap 1100. The orientation in this text is based on the gas stove's installation environment; the side of the gas stove closest to the ground is considered the bottom (top), and the side away from the ground is considered the top (top). The central ring burner hole 1132 and the outer ring burner hole 1131 are exposed on the burner cap 1100 from top to bottom; that is, the central ring burner hole 1132 can be seen when observing the burner cap 1100 from top to bottom. With the outer ring flame hole 1131 configured in this way, the igniting air and the combustion gas have a vertical velocity and a horizontal velocity away from the center of the flame cap 1100 when they separate from the middle ring flame hole 1132, and the blower air and the combustion gas have a vertical velocity and a horizontal velocity away from the center of the flame cap 1100 when they separate from the outer ring flame hole 1131. This makes it easier for the gas ejected from the middle ring flame hole 1132 to mix with the gas ejected from the outer ring flame hole 1131, achieving rich and lean combustion, improving flame stabilization and combustion efficiency, and also facilitating ignition.

[0053] Combination Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the first flame cap 1110 is a metal flame cap, and the second flame cap 1120 includes an infrared flame cap 1121, which is provided with inner ring flame holes 1133. Multiple outer ring flame holes 1131 are arranged in a ring around the middle ring flame hole 1132, which is slit-shaped. Multiple inner ring flame holes 1133 are densely arranged. The first flame cap 1110 is a metal flame cap, which can be made of copper, stainless steel, or iron. The infrared flame cap 1121 is, for example, a porous ceramic plate. With the infrared flame cap 1121, the flame holes have low heat intensity, enabling fully premixed combustion, improving combustion efficiency, reducing the need for secondary air, and even eliminating the need for supplemental secondary air. Thus, the burner head 1200 does not need an additional secondary air channel, reducing the structural complexity of the burner head 1200 and making it easier to manufacture. Generally speaking, the combustion power of the infrared burner cap 1121 is lower than that of the metal burner cap. However, by cooperating with the first burner cap 1110 and the second burner cap 1120, the combustion power of the burner 1000 can be ensured, and the gas can be fully combusted.

[0054] Combination Figure 4 , Figure 5 , Figure 6 and Figure 8As shown, in some embodiments, the inner wall of the first flame cap 1110 is provided with a first flame hole 1140, which communicates with the second cavity 1220. The first flame hole 1140 is lower than the middle ring flame hole 1132, meaning the highest point of the first flame hole 1140 is lower than the highest point of the middle ring flame hole 1132. A portion of the ignition needle 3100 and a portion of the sensing needle 3200 are positioned in the opening direction of the first flame hole 1140, allowing the ejected air to enter the second cavity 1220. Simultaneously with the gas ejected from the middle ring burner hole 1132, it also ejects from the first burner hole 1140. Since part of the ignition needle 3100 is located in the open direction of the first burner hole 1140, the gas ejected from the first burner hole 1140 easily contacts the ignition needle 3100 and is ignited to form a flame. This flame then propagates to ignite the middle ring burner hole 1132, the outer ring burner hole 1131, and the inner ring burner hole 1133. With this arrangement, the ignition needle 3100 does not need to be set too high. Similarly, since part of the sensing needle 3200 is located in the open direction of the first burner hole 1140, the flame formed in the first burner hole 1140 can reach the sensing needle 3200, so the sensing needle 3200 does not need to be set too high. Since the second cavity 1220 receives the ejector air and combustion gas, the gas ejected from the first flame port 1140 is also ejector air and combustion gas. The ejector air has a slower flow rate than the blower air, making it easier for the combustion gas to be ignited by the ignition needle 3100 and for the resulting flame to be detected by the sensing needle 3200. When the first flame cap 1110 is a metal flame cap and the second flame cap 1120 includes an infrared flame cap, the flame formed by the first flame port 1140 is longer than the flame formed by the inner ring flame port 1133 (or in other words, the infrared flame cap generally does not have an open flame or the flame is inside the inner ring flame port 1133), and it exhibits a certain degree of drifting, making it easier to transmit the flame and make it contact the sensing needle 3200.

[0055] Combination Figure 7 and Figure 8 As shown, in some embodiments, along the radial direction of the flame cap 1100, the first flame cap 1110 covers the ignition needle 3100 and the sensing needle 3200 from the outside in. "From the outside in" means from the direction away from the center of the flame cap 1100 towards the center of the flame cap 1100 along the radial direction of the flame cap 1100. And along the axial direction of the flame cap 1100, the second flame cap 1120 covers the ignition needle 3100 and the sensing needle 3200 from top to bottom. This arrangement achieves a concealed configuration of the ignition needle 3100 and the sensing needle 3200, further improving their protective performance and also providing some windproof design. Optionally, the ignition needle 3100 and the sensing needle 3200 can constitute an ignition sensing needle, such as an ionization ignition sensing needle, meaning that the same needle can perform both ignition and flame sensing functions.

[0056] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A gas hob, characterized in that The gas stove comprises: a burner (1000) comprising a fire cover (1100), the fire cover (1100) comprising a first fire cover (1110) and a second fire cover (1120), the first fire cover (1110) surrounding the second fire cover (1120), the first fire cover (1110) being provided with an outer ring fire hole (1131) and a middle ring fire hole (1132), the second fire cover (1120) being provided with an inner ring fire hole (1133); a gas valve (2000) provided with a first gas outlet channel (2100) and a second gas outlet channel (2200), the outer ring fire hole (1131) and the second gas outlet channel (2200) being in communication, the middle ring fire hole (1132) and the inner ring fire hole (1133) being in communication with the first gas outlet channel (2100) respectively, the gas valve (2000) being adapted to provide minimum flow through the first gas outlet channel (2100) when the second gas outlet channel (2200) is closed; a spark needle (3100) arranged between the first fire cover (1110) and the second fire cover (1120); and an induction needle (3200) arranged between the first fire cover (1110) and the second fire cover (1120).

2. Gas hob according to claim 1, characterized in that The gas stove comprises a tee joint (3300), the first gas outlet channel (2100) and a first end of the tee joint (3300) being in communication, the middle ring fire hole (1132) and a second end of the tee joint (3300) being in communication, and the inner ring fire hole (1133) and a third end of the tee joint (3300) being in communication.

3. The gas hob according to claim 1, characterized in that The outer ring fire hole (1131) is adapted to spray out gas and blast air, the middle ring fire hole (1132) is adapted to spray out gas and injection air, and the inner ring fire hole (1133) is adapted to spray out gas and injection air.

4. The gas hob according to claim 3, characterized in that The middle ring fire hole (1132) is adapted to stabilize the flame of the outer ring fire hole (1131).

5. The gas hob according to claim 4, characterized in that The outer ring fire hole (1131) is arranged obliquely away from the center of the fire cover (1100) from bottom to top, the middle ring fire hole (1132) is arranged obliquely away from the center of the fire cover (1100) from bottom to top, and the outer ring fire hole (1131) and the middle ring fire hole (1132) are exposed to the fire cover (1100) from top to bottom.

6. The gas hob according to claim 3, characterized in that The first fire cover (1110) is a metal fire cover, and the second fire cover (1120) comprises an infrared fire cover (1121) provided with the inner ring fire hole (1133).

7. The gas hob according to claim 3, characterized in that The burner (1000) comprises a burner head (1200), a first ejector pipe (1310), a second ejector pipe (1320), a third ejector pipe (1330) and a fan, the burner head (1200) is provided with a first cavity (1210), a second cavity (1220) and a third cavity (1230), the fire cover (1100) covers the burner head (1200), the outer ring fire hole (1131) and the first cavity (1210) are communicated, the middle ring fire hole (1132) and the second cavity (1220) are communicated, the inner ring fire hole (1133) and the third cavity (1230) are communicated, the first ejector pipe (1310) and the first cavity (1210) are communicated, the first ejector pipe (1310) is adapted to receive the blast air of the fan when receiving the gas of the second gas outlet channel (2200), the second ejector pipe (1320) and the second cavity (1220) are communicated, the second ejector pipe (1320) is adapted to eject air when receiving the gas of the first gas outlet channel (2100), the third ejector pipe (1330) and the third cavity (1230) are communicated, and the third ejector pipe (1330) is adapted to eject air when receiving the gas of the first gas outlet channel (2100).

8. The gas hob according to claim 7, characterized in that The first cavity (1210) surrounds the second cavity (1220), and the second cavity (1220) surrounds the third cavity (1230).

9. The gas hob according to claim 7, characterized in that An inner side wall of the first fire cover (1110) is provided with a first fire hole (1140) communicated with the second cavity (1220), the first fire hole (1140) is lower than the middle ring fire hole (1132), and a part of the ignition needle (3100) and a part of the induction needle (3200) are located in an open direction of the first fire hole (1140).

10. The gas hob according to claim 1, characterized in that The first fire cover (1110) shields the ignition needle (3100) and the induction needle (3200) from outside to inside along a radial direction of the fire cover (1100), and the second fire cover (1120) shields the ignition needle (3100) and the induction needle (3200) from top to bottom along an axial direction of the fire cover (1100).

11. Gas hob according to any one of claims 1 to 10, characterized in that The ignition needle (3100) and the induction needle (3200) constitute an ignition induction needle.

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