Gas stove

Abstract

The gas stove comprises a combustor, a gas valve, an ignition needle and an induction needle, the combustor comprises a fire cover, the fire cover is provided with an outer ring fire hole, a middle ring fire hole and an inner ring fire hole, the gas valve is provided with a first gas channel and a second gas channel, the outer ring fire hole is communicated with the first gas channel, the middle ring fire hole is communicated with the second gas channel, and the induction needle is communicated with the ignition needle. The inner ring fire hole communicates with the first gas channel or the second gas channel, the gas valve is suitable for providing the minimum flow through the first gas channel when the second gas channel is closed, the ignition needle is arranged on the outer side of the fire cover, and the induction needle is arranged on the outer side of the fire cover.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and particularly to a gas stove. Background Art

[0002] A gas stove includes a burner and a gas valve. The gas valve controls the amount of gas flowing to the burner. Most current burners are two-ring burners, which require a two-ring gas valve. At present, three-ring burners have emerged on the market. A three-ring burner requires a three-ring gas valve. However, the structure of the three-ring gas valve is more complex and costly than that of the two-ring gas valve. In addition, there are certain difficulties in how the three-ring burner cooperates with the ignition needle and the induction needle. Utility Model Content

[0003] This application aims to at least solve one of the technical problems in the related art to some extent. For this purpose, this application provides a gas stove.

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

[0005] A burner, the burner includes a burner cap, and the burner cap is provided with outer ring fire holes, middle ring fire holes and inner ring fire holes;

[0006] A gas valve, the gas valve is provided with a first gas passage and a second gas passage. The outer ring fire holes are communicated with the first gas passage, the middle ring fire holes are communicated with the second gas passage, the inner ring fire holes are communicated with the first gas passage or the second gas passage, and the gas valve is adapted to provide a minimum flow rate through the first gas passage when the second gas passage is closed;

[0007] An ignition needle, disposed outside the burner cap; and

[0008] An induction needle, disposed outside the burner cap.

[0009] In some embodiments of this application, the gas stove includes a tee joint. The first gas passage is communicated with the first end of the tee joint, the outer ring fire holes are communicated with the second end of the tee joint, and the inner ring fire holes are communicated with the third end of the tee joint.

[0010] In some embodiments of this application, the gas stove includes a tee joint. The second gas passage is communicated with the first end of the tee joint, the middle ring fire holes are communicated with the second end of the tee joint, and the inner ring fire holes are communicated with the third end of the tee joint.

[0011] In some embodiments of this application, the outer ring fire holes are adapted to eject gas and entrained air, the middle ring fire holes are adapted to eject gas and blast air, and the inner ring fire holes are adapted to eject gas and entrained air.

[0012] In some embodiments of the present application, the flame generated by the outer ring of flame holes is suitable for stabilizing the flame of the middle ring of flame holes.

[0013] In some embodiments of the present application, the outer ring of flame holes is inclined away from the center of the burner cap from bottom to top, the middle ring of flame holes is inclined away from the center of the burner cap from bottom to top, and the outer ring of flame holes and the middle ring of flame holes are exposed from the burner cap in the direction from top to bottom.

[0014] In some embodiments of the present application, the distance between the inner edge and the outer edge of the outer ring of flame holes in the radial direction of the burner cap is a, and the height difference in the axial direction of the burner cap is d, where a ≥ 1.5 mm and d ≤ 0.5a;

[0015] The distance between the inner edge and the outer edge of the middle ring of flame holes in the radial direction of the burner cap is b, and the height difference in the axial direction of the burner cap is f, where b ≥ 1.5 mm and f ≤ 0.5b;

[0016] The distance between the inner edge of the outer ring of flame holes and the outer edge of the middle ring of flame holes in the radial direction of the burner cap is c, and the height difference in the axial direction of the burner cap is e, where c ≤ 4 mm and e ≤ 3c.

[0017] In some embodiments of the present application, the outer ring of flame holes is in the shape of an annular slit, the middle ring of flame holes is in the shape of an annular slit, and the outer ring of flame holes surrounds the middle ring of flame holes.

[0018] In some embodiments of the present 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 covered on the burner head. The outer ring of flame holes is communicated with the first cavity, the middle ring of flame holes is communicated with the second cavity, the inner ring of flame holes is communicated with the third cavity. The first ejector tube is communicated with the first cavity and is suitable for ejecting air when receiving the gas from the first gas passage. The second ejector tube is communicated with the second cavity and is suitable for receiving the blast air from the blower when receiving the gas from the second gas passage. The third ejector tube is communicated with the third cavity and is suitable for ejecting air when receiving the gas from the first gas passage or the second gas passage.

[0019] In some embodiments of the present application, the first cavity surrounds the second cavity, and the second cavity surrounds the third cavity;

[0020] And / or, the burner head is an integrally formed part, and the first ejector tube, the second ejector tube and the third ejector tube are respectively connected to the burner head.

[0021] In some embodiments of the present application, the burner cap includes a first burner cap and a second burner cap. The first burner cap surrounds the second burner cap. The first burner cap is a metal burner cap and is provided with the outer ring flame holes and the middle ring flame holes. The second burner cap is an infrared burner cap and is provided with the inner ring flame holes.

[0022] In some embodiments of the present application, a first flame hole communicating with the first cavity is provided on the outer side wall of the burner cap. The first flame hole is lower than the outer ring flame holes. Part of the ignition needle and part of the induction needle are located in the opening direction of the first flame hole.

[0023] In some embodiments of the present application, the ignition needle and the induction needle form an ignition and induction needle.

[0024] In the technical solution of the present application, the burner has outer ring flame holes, middle ring flame holes and inner ring flame holes, that is, the burner constitutes a three-ring burner. The gas valve has a first gas passage and a second gas passage, that is, the gas valve constitutes a two-ring gas valve. The outer ring flame holes are communicated with the first gas passage, the middle ring flame holes are communicated with the second gas passage, and the inner ring flame holes are communicated with the first gas passage or the second gas passage. Thus, the gas valve supplies gas to the outer ring flame holes through the first gas passage and supplies gas to the middle ring flame holes and the inner ring flame holes through the second gas passage, or the gas valve supplies gas to the outer ring flame holes and the inner ring flame holes through the first gas passage and supplies gas to the middle ring flame holes through the second gas passage. It can be seen that gas supply to the three-ring burner can be achieved without using a three-ring gas valve, reducing costs. On this basis, the ignition needle and the induction needle are arranged on the outer side of the burner cap, reducing the structural complexity of the burner. Since the gas valve provides the minimum flow through the first gas passage when the second gas passage is closed, and the outer ring flame holes are communicated with the first gas passage, when the burner is in the minimum fire state, a flame can be formed at the outer ring flame holes, and the induction needle can continuously detect the flame at the outer ring flame holes. When adjusting from a small fire to ignition, the flame at the outer ring flame holes can transfer the fire to the middle ring flame holes and the inner ring flame holes.

[0025] Other advantages of the present application will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other designs can be obtained based on the structures shown in these drawings without creative efforts.

[0027] Figure 1Schematic diagram of the cooperation between the burner and the gas valve in some embodiments;

[0028] Figure 2 Schematic diagram of the cooperation between the burner and the gas valve in some other embodiments;

[0029] Figure 3 Schematic diagram of the burner in some embodiments;

[0030] Figure 4 Schematic diagram of the burner in some embodiments (viewpoint is different from Figure 3 );

[0031] Figure 5 Exploded view of the burner in some embodiments;

[0032] Figure 6 Cross-sectional view of the burner in some embodiments;

[0033] Figure 7 For Figure 6 The enlarged view marked as Ⅰ in;

[0034] Figure 8 Schematic diagram of the cooperation between the outer ring flame holes and the inner ring flame holes in some embodiments;

[0035] Figure 9 Schematic diagram of the cooperation between the outer ring flame holes and the inner ring flame holes in another embodiment;

[0036] Figure 10 Schematic diagram of the burner cap in some embodiments;

[0037] Figure 11 Top view of the burner cap in some embodiments;

[0038] Figure 12 Schematic diagram of the burner head in some embodiments.

[0039] Explanation of the reference numerals in the attached drawings:

[0040] Burner 1000, burner cap 1100, first burner cap 1110, second burner cap 1120, outer ring flame holes 1131, middle ring flame holes 1132, inner ring flame holes 1133, first flame holes 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 passage 2100, second gas passage 2200, ignition needle 3100, induction needle 3200, tee joint 3300.

[0041] The realization, functional features and advantages of the purpose of this application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0045] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0046] The present application discloses a gas stove, in combination with Figures 1 to 3 and Figure 10As shown, in some embodiments, a gas stove includes a burner 1000, a gas valve 2000, an ignition needle 3100, and an induction needle 3200. The burner 1000 includes a burner cap 1100. The burner cap 1100 is provided with an outer ring fire hole 1131, a middle ring fire hole 1132, and an inner ring fire hole 1133. The gas valve 2000 is provided with a first gas passage 2100 and a second gas passage 2200. The outer ring fire hole 1131 is communicated with the first gas passage 2100, and the gas output from the first gas passage 2100 can be ejected from the outer ring fire hole 1131. The middle ring fire hole 1132 is communicated with the second gas passage 2200, and the gas output from the second gas passage 2200 can be ejected from the middle ring fire hole 1132. The inner ring fire hole 1133 is communicated with the first gas passage 2100 or the second gas passage 2200, and the gas output from the first gas passage 2100 or the second gas passage 2200 can be ejected from the inner ring fire hole 1133. The ignition needle 3100 is arranged outside the burner cap 1100, and the induction needle 3200 is arranged outside the burner cap 1100.

[0047] Specifically, the burner 1000 includes a burner cap 1100. The burner cap 1100 is provided with an outer ring fire hole 1131, a middle ring fire hole 1132, and an inner ring fire hole 1133. It can be understood that the so-called outer ring fire hole 1131, middle ring fire hole 1132, and inner ring fire hole 1133 mean that the outer ring fire hole 1131 is more outward relative to the middle ring fire hole 1132 and the inner ring fire hole 1133, the inner ring fire hole 1133 is more inward relative to the outer ring fire hole 1131 and the middle ring fire hole 1132, and the middle ring fire hole 1132 is arranged between the outer ring fire hole 1131 and the inner ring fire hole 1133. Thus, along the direction away from the center of the burner cap 1100, the inner ring fire hole 1133, the middle ring fire hole 1132, and the outer ring fire hole 1131 are arranged in sequence.

[0048] Gas needs to be introduced into the burner 1000 and ejected from the corresponding outer ring fire hole 1131, middle ring fire hole 1132, and inner ring fire hole 1133 to be ignited to form a flame. The gas supply of the burner 1000 needs to be carried out through the gas valve 2000. In order to realize the gas supply to the outer ring fire hole 1131, middle ring fire hole 1132, and inner ring fire hole 1133, a three-ring gas valve is used in the related art. The three-ring gas valve includes a valve core and a valve seat. The valve core is rotatably arranged in the valve seat. The valve seat is provided with three air outlet channels. The valve core and the valve seat need to be provided with a matching structure corresponding to the three air outlet channels to control the air outlet of the three air outlet channels. However, the structure of the three-ring gas valve is complex and the cost is high. Therefore, in this embodiment, the used gas valve 2000 is provided with two air outlet channels, forming a two-ring gas valve. The structure of the two-ring gas valve is simpler and the cost is lower than that of the three-ring gas valve.

[0049] The gas valve 2000 of this embodiment includes a first gas passage 2100 and a second gas passage 2200, thus forming a two-ring gas valve. The gas valve 2000 can provide the maximum flow rate (referring to the gas flow rate) through the opening of the first gas passage 2100 and the second gas passage 2200. The gas valve 2000 can provide the minimum flow rate (referring to the gas flow rate) through the opening of the first gas passage 2100 and the closing of the second gas passage 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 flame holes 1131 are communicated with the first gas passage 2100. The gas output from the first gas passage 2100 enters the burner 1000 and is ejected from the outer-ring flame holes 1131. The middle-ring flame holes 1132 are communicated with the second gas passage 2200. The gas output from the second gas passage 2200 enters the burner 1000 and is ejected from the middle-ring flame holes 1132. The inner-ring flame holes 1133 are communicated with either the first gas passage 2100 or the second gas passage 2200. The gas output from the first gas passage 2100 enters the burner 1000 and is ejected from the inner-ring flame holes 1133, or the gas output from the second gas passage 2200 enters the burner 1000 and is ejected from the inner-ring flame holes 1133.

[0050] For example, both the outer-ring flame holes 1131 and the inner-ring flame holes 1133 are communicated with the first gas passage 2100, while the middle-ring flame holes 1132 are communicated with the second gas passage 2200. The gas output from the first gas passage 2100 enters the burner 1000 and is ejected from the corresponding outer-ring flame holes 1131 and inner-ring flame holes 1133. The gas output from the second gas passage 2200 enters the burner 1000 and is ejected from the middle-ring flame holes 1132.

[0051] For another example, the outer-ring flame holes 1131 are communicated with the first gas passage 2100, and both the middle-ring flame holes 1132 and the inner-ring flame holes 1133 are communicated with the second gas passage 2200. The gas provided by the first gas passage 2100 enters the burner 1000 and is ejected from the outer-ring flame holes 1131. The gas provided by the second gas passage 2200 enters the burner 1000 and is ejected from the corresponding middle-ring flame holes 1132 and inner-ring flame holes 1133.

[0052] It can be seen that in this embodiment, without using a three-ring gas valve, a two-ring gas valve can also supply gas to the three-ring burner, reducing costs. Since the gas valve 2000 provides the minimum flow through the first gas passage 2100, and the outer ring flame holes 1131 are connected to the first gas passage 2100 while the middle ring flame holes 1132 and the inner ring flame holes 1133 are both connected to the second gas passage 2200, compared with the scheme where the outer ring flame holes 1131 and the inner ring flame holes 1133 are both connected to the first gas passage 2100 and the middle ring flame holes 1132 are connected to the second gas passage 2200, the power of the burner 1000 in the minimum fire state is smaller.

[0053] The gas valve 2000 provides the minimum flow through the first gas passage 2100, and the outer ring flame holes 1131 are connected to the first gas passage 2100. Thus, no matter whether the gas valve 2000 provides the minimum flow or the maximum flow, flames are formed at the outer ring flame holes 1131. Therefore, in this embodiment, the sensing needle 3200 is arranged outside the burner cap 1100. Here, the outside refers to the periphery of the burner cap 1100. The sensing needle 3200 is closer to the outer ring flame holes 1131 (relatively far from the middle ring flame holes 1132 and the inner ring flame holes 1133). The sensing needle 3200 can continuously detect the flames at the outer ring flame holes 1131 to ensure the continuous gas supply of the gas valve 2000. It can be understood that the burner 1000 generally includes a burner head 1200 and a burner cap 1100. The burner cap 1100 is covered on the burner head 1200. The burner cap 1100 and the burner head 1200 need to enclose a space corresponding to and communicating with the outer ring flame holes 1131, the middle ring flame holes 1132, and the inner ring flame holes 1133. If the sensing needle 3200 is arranged at a position close to the center of the burner 1000, then the sensing needle 3200 needs to consider the cooperation with the internal structure of the burner cap 1100 and the internal structure of the burner head 1200. However, when the sensing needle 3200 is arranged outside the burner cap 1100, the sensing needle 3200 can be without the cooperation with the internal structure of the burner cap 1100 and the internal structure of the burner head 1200 or reduce the interference during the structural design, reducing the structural complexity and being more conducive to the manufacture of the burner 1000. Similarly, the ignition needle 3100 is also arranged outside the burner cap 1100. During ignition, the ignition needle 3100 ignites the outer ring flame holes 1131 to form flames, and then the flames spread from the outside to the inside to make the middle ring flame holes 1132 and the inner ring flame holes 1133 form flames.

[0054] The outer ring flame holes 1131 and the inner ring flame holes 1133 are both connected to the first gas channel 2100, and there are various ways for the middle ring flame holes 1132 to be connected to the second gas channel 2200. For example, the first gas channel 2100 has two connectors. One connector is connected to the burner 1000 through a gas pipe and is connected to the outer ring flame hole 1131, and the other connector is connected to the burner 1000 through a gas pipe and is connected to the inner ring flame hole 1133. This solution requires improving the first gas channel 2100 to form two connectors (each gas channel of a common two-ring gas valve has one connector). In some embodiments, in combination with Figure 1 As shown, the gas stove includes a three-way connector 3300. The three-way connector 3300 has a first end, a second end, and a third end, and the first end, the second end, and the third end are interconnected. The first end is connected to the first gas channel 2100 (such as through a gas pipe), the second end is connected to the outer ring flame hole 1131 (such as through a gas pipe), and the third end is connected to the inner ring flame hole 1133 (such as through a gas pipe). In this way, the gas output from the first gas channel 2100 flows to the three-way connector 3300 and is split, and thus flows to the outer ring flame hole 1131 and the inner ring flame hole 1133. Without improving the first gas channel 2100 to form two connectors, the gas supply to the outer ring flame hole 1131 and the inner ring flame hole 1133 can also be achieved.

[0055] There are various ways for the outer ring flame hole 1131 to be connected to the first gas channel 2100 and the middle ring flame hole 1132 and the inner ring flame hole 1133 to be connected to the second gas channel 2200. For example, the second gas channel 2200 has two connectors. One connector is connected to the burner 1000 through a gas pipe and is connected to the middle ring flame hole 1132, and the other connector is connected to the burner 1000 through a gas pipe and is connected to the inner ring flame hole 1133. This solution requires improving the second gas channel 2200 to form two connectors (each gas channel of a common two-ring gas valve has one connector). In some embodiments, in combination with Figure 2 As shown, the gas stove includes a three-way connector 3300. The three-way connector 3300 has a first end, a second end, and a third end, and the first end, the second end, and the third end are interconnected. The first end is connected to the second gas channel 2200 (such as through a gas pipe), the second end is connected to the middle ring flame hole 1132 (such as through a gas pipe), and the third end is connected to the inner ring flame hole 1133 (such as through a gas pipe). In this way, the gas output from the second gas channel 2200 flows to the three-way connector 3300 and is split, and thus flows to the middle ring flame hole 1132 and the inner ring flame hole 1133. Without improving the second gas channel 2200 to form two connectors, the gas supply to the middle ring flame hole 1132 and the inner ring flame hole 1133 can also be achieved.

[0056] In combination with Figures 1 to 5As shown, in some embodiments, the outer-ring flame holes 1131 are used for ejecting induced air and gas, the middle-ring flame holes 1132 are used for ejecting blast air and gas, and the inner-ring flame holes 1133 are used for ejecting induced air and gas. The gas valve 2000 controls the gas supply to the outer-ring flame holes 1131, the middle-ring flame holes 1132, and the inner-ring flame holes 1133. The induced air is obtained by synchronously ejecting air during the gas supply process, and the blast air is generated by a fluid device.

[0057] Specifically, the outer-ring flame holes 1131 are used for ejecting induced air and gas. The induced 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 holes 1131 and are ignited to form a flame. The gas is sourced from bottled liquefied gas or pipeline natural gas. The gas ejected from the first gas passage 2100 of the gas valve 2000 passes through a nozzle and is ejected into the interior of the burner 1000. During the process of the gas being ejected into the interior of the burner 1000, the induction of air is synchronously achieved. For the induction of air, reference can be made to related technologies. Generally, based on the Venturi principle, a negative pressure is formed in the surrounding environment during the process of the gas being ejected into the interior of the burner 1000, causing the air in the surrounding environment to be synchronously induced into the interior of the burner 1000 along with the ejection of the gas (this part of the air that enters the interior of the burner 1000 through the induction effect is called induced air, and the induced air is primary air). The induced air and gas are mixed in the interior of the burner 1000 and then ejected from the outer-ring flame holes 1131 and are subsequently ignited to form a flame.

[0058] The middle-ring flame holes 1132 are used for ejecting blast air and gas. The blast air and gas enter the interior of the burner 1000, and then are ejected from the interior of the burner 1000 through the middle-ring flame holes 1132 and are ignited to form a flame. The gas is sourced from bottled liquefied gas or pipeline natural gas. The gas ejected from the second gas passage 2200 of the gas valve 2000 passes through a nozzle and is ejected into the interior of the burner 1000. During the process of the gas being ejected into the interior of the burner 1000, blast air is provided. The blast air is generated by a fluid machine, such as by forced blast from a blower 3400. The blast air and gas enter the interior of the burner 1000 (the blast air is primary air). The blast air and gas are mixed in the interior of the burner 1000 and then ejected from the middle-ring flame holes 1132 and are subsequently ignited to form a flame.

[0059] The inner ring flame holes 1133 are used for ejecting the entrained air and gas. The entrained air and gas enter the interior of the burner 1000, and then are ejected from the interior of the burner 1000 through the inner ring flame holes 1133 and are ignited to form a flame. The gas comes from canned liquefied gas or pipeline natural gas. The gas output from the first gas channel 2100 or the second gas channel 2200 of the gas valve 2000 is ejected through the nozzle. The gas ejected from the nozzle is sprayed into the interior of the burner 1000. During the process of the gas being sprayed into the interior of the burner 1000, the entrainment of air is synchronously achieved. For the entrainment of air, reference can be made to the related technology, which is generally based on the Venturi principle. During the process of the gas being sprayed into the interior of the burner 1000, a negative pressure is formed in the surrounding environment, so that the air in the surrounding environment is synchronously entrained into the interior of the burner 1000 along with the spraying of the gas (the air that enters the interior of the burner 1000 through the entrainment effect is called entrained air, and the entrained air is primary air). The entrained air and gas are mixed in the interior of the burner 1000 and then ejected from the inner ring flame holes 1133 and are then ignited to form a flame.

[0060] Compared with the entrained air, the blast air can provide more oxygen, so that the gas ejected from the middle ring flame holes 1132 is in a state of rich oxygen combustion, thus enabling the full combustion of the gas ejected from the middle ring flame holes 1132 (the flame generated by the middle ring flame holes 1132 can still entrain the secondary air in the surrounding environment to participate in combustion). When the entrained air ejected from the outer ring flame holes 1131 is not sufficient to support the combustion of the gas ejected from the outer ring flame holes 1131, the supplement of secondary air is required. Since the blast air ejected from the middle ring flame holes 1132 can provide sufficient oxygen, the blast air ejected from the middle ring flame holes 1132 can not only participate in the combustion of the gas ejected from the middle ring flame holes 1132, but also provide excess oxygen to supplement the gas ejected from the outer ring flame holes 1131 and assist in the combustion of the gas ejected from the outer ring flame holes 1131. Compared with supplementing the secondary air from the surrounding environment by the entrainment effect, the excess oxygen provided by the blast air ejected from the middle ring flame holes 1132 is more actively supplemented into the gas ejected from the outer ring flame holes 1131. By such a setting, the gas ejected from the outer ring flame holes 1131 can be fully combusted (in this case, the flame generated by the outer ring flame holes 1131 can still entrain the secondary air in the surrounding environment to participate in combustion).

[0061] When the entrained air ejected from the inner ring flame holes 1133 is insufficient to support the combustion of the gas ejected from the inner ring flame holes 1133, secondary air needs to be supplemented. Since the blast air is ejected from the middle ring flame holes 1132, the blast air ejected from the middle ring flame holes 1132 can provide enough oxygen, so that in addition to participating in the combustion of the gas ejected from the middle ring flame holes 1132, the blast air ejected from the middle ring flame holes 1132 can also provide excess oxygen to be supplemented into the gas ejected from the inner ring flame holes 1133 to assist the combustion of the gas ejected from the inner ring flame holes 1133. Compared with supplementing secondary air from the surrounding environment by entrainment, the excess oxygen provided by the blast air ejected from the middle ring flame holes 1132 is more actively supplemented into the gas ejected from the inner ring flame holes 1133. By such an arrangement, the gas ejected from the inner ring flame holes 1133 burns sufficiently (in this case, the flame generated by the inner ring flame holes 1133 can still entrain secondary air from the surrounding environment to participate in combustion).

[0062] For example, in combination with Figures 1 to 7 and Figure 12As shown in the figure, the burner 1000 includes a burner head 1200, a first ejector pipe 1310, a second ejector pipe 1320, a third ejector pipe 1330, and a blower 3400. 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 in sequence from the inside to the outside. The burner cap 1100 covers the burner head 1200 to enclose the first cavity 1210, the second cavity 1220, and the third cavity 1230. In this way, the outer ring flame holes 1131 are communicated with the first cavity 1210, the middle ring flame holes 1132 are communicated with the second cavity 1220, and the inner ring flame holes 1133 are communicated with the third cavity 1230. One end of the first ejector pipe 1310 is communicated with the first cavity 1210, one end of the second ejector pipe 1320 is communicated with the second cavity 1220, one end of the third ejector pipe 1330 is communicated with the third cavity 1230, and the other end of the first ejector pipe 1310 is communicated with the first gas passage 2100, the other end of the second ejector pipe 1320 is communicated with the second gas passage 2200, and the other end of the third ejector pipe 1330 is communicated with the first gas passage 2100 or the second gas passage 2200. The gas output from the first gas passage 2100 is ejected towards the first ejector pipe 1310. At the same time, the air in the surrounding environment is ejected. The ejected air and the gas enter the first cavity 1210 through the first ejector pipe 1310 and then are ejected from the outer ring flame holes 1131. The gas output from the second gas passage 2200 is ejected towards the second ejector pipe 1320. At the same time, the blast air provided by the blower 3400 is also conveyed towards the second ejector pipe 1320. In this way, the blast air and the gas enter the second cavity 1220 through the second ejector pipe 1320 and then are ejected from the middle ring flame holes 1132. The gas output from the first gas passage 2100 or the second gas passage 2200 is also ejected towards the third ejector pipe 1330. At the same time, the air in the surrounding environment is ejected. The ejected air and the gas enter the third cavity 1230 through the third ejector pipe 1330 and then are ejected from the inner ring flame holes 1133.

[0063] The blower 3400 can continue to start after the gas stove is ignited to continuously provide blast air. Whether the burner 1000 is in the minimum fire state or the maximum fire state, blast air can still be ejected through the middle ring flame holes 1132 to participate in combustion. The burner head 1200 can be an integrally formed part. For example, the burner head 1200 is integrally formed through casting and then machining, reducing the number of parts. The first ejector pipe 1310, the second ejector pipe 1320, and the third ejector pipe 1330 are respectively connected to the burner head 1200, for example, by screws, and the processing is simple.

[0064] It can be understood that since the outer ring flame holes 1131 supply the entrained air to eject, the flow rate of the entrained air is relatively small compared to the blast air. The ignition pin 3100 is arranged outside the burner cap 1100. Thus, the ignition pin 3100 is closer to the outer ring flame holes 1131, and it is easier for the ignition pin 3100 to ignite the gas ejected from the outer ring flame holes 1131, so as to transfer the flame from outside to inside and ignite the gas ejected from the middle ring flame holes 1132 and the inner ring flame holes 1133.

[0065] Furthermore, in some embodiments, the flame generated by the outer ring flame holes 1131 is suitable for stabilizing the flame of the middle ring flame holes 1132. Specifically, the middle ring flame holes 1132 eject blast air and gas. The inventor found that although the sufficient combustion of the gas can be achieved through the blast air, due to the action of the blast air, the gas flow rate ejected from the middle ring flame holes 1132 is relatively large, and the speed of the gas leaving the middle ring flame holes 1132 is greater than the combustion speed of the gas, which is likely to cause the flame lift phenomenon. Since the outer ring flame holes 1131 eject entrained air and gas, and the entrained air is naturally entrained by jetting the gas through the nozzle and does not need to be generated based on fluid machinery, the difference between the speed of the gas leaving the outer ring flame holes 1131 and the combustion speed of the gas is not large, and stable combustion can be achieved, that is, the flame state formed by the outer ring flame holes 1131 is stable. Since the flame formed by the outer ring flame holes 1131 is more stable, the flame generated by the outer ring flame holes 1131 can be used to stabilize the flame of the middle ring flame holes 1132.

[0066] That is to say, in addition to heating the cooking utensil, the flame formed by the outer ring flame holes 1131 also functions as a flame stabilizing hole / flame stabilizing groove. Generally speaking, since the outer ring flame holes 1131 supply the entrained air and gas to eject, the gas ejected from the outer ring flame holes 1131 has a more stable combustion state. By adjusting the position, angle or distance between the outer ring flame holes 1131 and the middle ring flame holes 1132, etc., the flame formed by the outer ring flame holes 1131 ignites the gas ejected from the middle ring flame holes 1132 (for example, the flame formed by the outer ring flame holes 1131 heats the root of the gas ejected from the middle ring flame holes 1132 to ignite the gas ejected from the middle ring flame holes 1132). When the gas quickly leaves the middle ring flame holes 1132, it is ignited by the flame formed by the outer ring flame holes 1131, so that the gas quickly leaving the middle ring flame holes 1132 burns at the middle ring flame holes 1132, thereby inhibiting the occurrence of the flame lift phenomenon at the middle ring flame holes 1132, playing a role in stabilizing the flame of the middle ring flame holes 1132 and further improving the combustion efficiency.

[0067] Combined with Figure 6 and Figure 7 、 Figure 10 、 Figure 11As shown, in some embodiments, the outer ring flame holes 1131 are inclined upwardly away from the center of the burner cap, and the middle ring flame holes 1132 are also inclined upwardly away from the center of the burner cap. The orientation herein is referenced with the gas stove installed in the use environment. The side of the gas stove close to the ground is the bottom (top), and the side of the gas stove away from the ground is the top (top). The outer ring flame holes 1131 and the middle ring flame holes 1132 are exposed on the burner cap 1100 in the direction from top to bottom, that is, when observing the burner cap 1100 in the direction from top to bottom, the outer ring flame holes 1131 and the middle ring flame holes 1132 can be seen. By setting like this, the entrained air and gas have a vertical velocity and a horizontal velocity away from the center of the burner cap 1100 when separating from the outer ring flame holes 1131, and the blown air and gas have a vertical velocity and a horizontal velocity away from the center of the burner cap 1100 when separating from the middle ring flame holes 1132. In this way, it is easier to mix the gas ejected from the outer ring flame holes 1131 and the gas ejected from the middle ring flame holes 1132, achieve lean-burn combustion, improve the flame stabilization effect and combustion efficiency, and is also beneficial to flame transfer.

[0068] In order to further optimize the cooperation between the outer ring flame holes 1131 and the middle ring flame holes 1132, achieve a better flame stabilization effect and combustion efficiency, and adapt to burners 1000 with more internal structures, after a large number of experiments by the inventor, the following dimensional ranges are obtained. Combining Figures 6 to 9 As shown, along the radial direction of the burner cap 1100, the distance between the outer edge and the inner edge of the outer ring flame holes 1131 is a, the distance between the outer edge and the inner edge of the middle ring flame holes 1132 is b, and the distance between the inner edge of the outer ring flame holes 1131 and the outer edge of the middle ring flame holes 1132 is c; along the axial direction of the burner cap 1100, the height difference between the outer edge and the inner edge of the outer ring flame holes 1131 is d, the height difference between the outer edge and the inner edge of the middle ring flame holes 1132 is f, and the height difference between the inner edge of the outer ring flame holes 1131 and the outer edge of the middle ring flame holes 1132 is e; satisfying a≥1.5mm, b≥1.5mm, c≤4mm, d≤0.5a, f≤0.5b, e≤3c.

[0069] For example, a is within 10mm and can be 1.5mm, 2mm, 3mm, 4mm, 5mm, 8mm or 10mm; b is within 10mm and can be 1.5mm, 2mm, 3mm, 4mm, 5mm, 8mm or 10mm; c can be 0mm, 0.5mm, 1mm, 2mm, 3mm or 4mm; d can be 0mm, 0.1a, 0.2a, 0.3a, 0.4a or 0.5a; f can be 0mm, 0.1b, 0.2b, 0.3b, 0.4b or 0.5b; e can be 0mm, 0.5c, 1c, 2c or 3c(Figure 8 The height differences d, e, and f are 0 mm, so they are not shown. The height differences d, e, and f need to be referred to in Figure 9 ).

[0070] It can be understood that the outer ring fire hole 1131, the middle ring fire hole 1132 and the inner ring fire hole 1133 mentioned above are flow channel structures for gas ejection, which can be round holes, square holes, slits or other shapes. In some embodiments, combined with Figure 10 As shown, the outer ring fire hole 1131 is in the shape of an annular slit, and the middle ring fire hole 1132 is also in the shape of an annular slit, and the outer ring fire hole 1131 surrounds the middle ring fire hole 1132. The annular slit-shaped outer ring fire hole 1131 and the middle ring fire hole 1132 are continuous along the circumference of the burner 1000, so that the excess oxygen in the gas ejected from the middle ring fire hole 1132 can increase the contact with the gas ejected from the outer ring fire hole 1131, further improving the oxygen supplementation effect, and also helping to further improve the flame stabilization effect of the outer ring fire hole 1131 on the middle ring fire hole 1132. On the basis that the outer ring fire holes 1131 and the middle ring fire holes 1132 are in the shape of annular gaps, when the outer ring fire holes 1131 are inclined away from the center of the fire cover from bottom to top, and the middle ring fire holes 1132 are also inclined away from the center of the fire cover from bottom to top, the outer ring fire holes 1131 gradually expand from bottom to top, and the middle ring fire holes 1132 also gradually expand from bottom to top.

[0071] Combination Figure 10 and Figure 11 As shown, in some embodiments, the fire cover 1100 includes a first fire cover 1110 and a second fire cover 1120, the first fire cover 1110 surrounds the second fire cover 1120, the first fire cover 1110 is a metal fire cover, the second fire cover 1120 is an infrared fire cover, the first fire cover 1110 is provided with an outer ring fire hole 1131 and a middle ring fire hole 1132, and the second fire cover 1120 is provided with an inner ring fire hole 1133. Figure 10As shown in the figure, the outer ring flame holes 1131 of the first burner cap 1110 are in the shape of an annular slit, the middle ring flame holes 1132 are in the shape of an annular slit, the outer ring flame holes 1131 surround the middle ring flame holes 1132, the number of the inner ring flame holes 1133 of the second burner cap 1120 is multiple (multiple means two or more), and the multiple inner ring flame holes 1133 are densely arranged. The first burner cap 1110 is a metal burner cap, and the material can be copper, stainless steel or iron. The second burner cap 1120 is an infrared burner cap, such as a porous ceramic plate. The flame length formed by the first burner cap 1110 is larger than that formed by the second burner cap 1120, and the flame of the first burner cap 1110 shows a certain fluttering relative to the flame of the second burner cap 1120 (relatively speaking). In this way, it is easier to transfer fire from the outside to the inside and be detected by the flame sensing needle 3200 after the ignition needle 3100 ignites. Or rather, the infrared burner cap generally has no open flame or the flame is in the inner ring flame holes 1133. The second burner cap 1120 is an infrared burner cap, and the heat intensity of its flame holes is small, which can realize full premixed combustion, improve the combustion efficiency, reduce the demand for secondary air, and even eliminate the need to supplement secondary air. In this way, the burner head 1200 does not need to be provided with an additional secondary air passage, further reducing the structural complexity of the burner head 1200 and making it more convenient for manufacturing.

[0072] Combined Figure 3 、 Figure 5 and Figure 10 As shown in the figure, in some embodiments, a first flame hole 1140 is provided on the outer side wall of the burner cap 1100. The first flame hole 1140 is communicated with the first cavity 1210. The first flame hole 1140 is lower than the outer ring flame holes 1131. Here, the first flame hole 1140 is lower than the outer ring flame holes 1131, that is, the highest point of the first flame hole 1140 is lower than the highest point of the outer ring flame holes 1131. Part of the ignition needle 3100 and part of the flame sensing needle 3200 are arranged in the opening direction of the first flame hole 1140. The induced air and gas entering the first cavity 1210 are also ejected from the first flame hole 1140 synchronously when they are ejected from the outer ring flame holes 1131. Since part of the ignition needle 3100 is located in the opening direction of the first flame hole 1140, the gas is easily contacted by the ignition needle 3100 and ignited by the ignition needle 3100 to form a flame when it is ejected from the first flame hole 1140, and then the fire is transferred to ignite the outer ring flame holes 1131, the middle ring flame holes 1132 and the inner ring flame holes 1133. By such a setting, the ignition needle 3100 does not need to be set too high. Similarly, since part of the flame sensing needle 3200 is arranged in the opening direction of the first flame hole 1140, the flame formed by the first flame hole 1140 can burn to the flame sensing needle 3200, and the flame sensing needle 3200 does not need to be set too high. Further, the ignition needle 3100 and the flame sensing needle 3200 can form an ignition and sensing needle, such as an ion ignition and sensing needle, that is, the same needle can realize both the ignition function and the flame sensing function.

[0073] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A gas stove, characterized in that, Comprising: A burner (1000), the burner (1000) including a burner cap (1100), the burner cap (1100) being provided with outer ring flame holes (1131), middle ring flame holes (1132) and inner ring flame holes (1133); A gas valve (2000), the gas valve (2000) being provided with a first gas passage (2100) and a second gas passage (2200), the outer ring flame holes (1131) being in communication with the first gas passage (2100), the middle ring flame holes (1132) being in communication with the second gas passage (2200), the inner ring flame holes (1133) being in communication with the first gas passage (2100) or the second gas passage (2200), the gas valve (2000) being adapted to provide a minimum flow rate through the first gas passage (2100) when closing the second gas passage (2200); An ignition needle (3100), provided outside the burner cap (1100); and A sensing needle (3200), provided outside the burner cap (1100).

2. The gas stove according to claim 1, characterized in that, The gas stove includes a tee joint (3300), the first gas passage (2100) being in communication with the first end of the tee joint (3300), the outer ring flame holes (1131) being in communication with the second end of the tee joint (3300), and the inner ring flame holes (1133) being in communication with the third end of the tee joint (3300).

3. The gas stove according to claim 1, characterized in that, The gas stove includes a tee joint (3300), the second gas passage (2200) being in communication with the first end of the tee joint (3300), the middle ring flame holes (1132) being in communication with the second end of the tee joint (3300), and the inner ring flame holes (1133) being in communication with the third end of the tee joint (3300).

4. The gas stove according to claim 1, characterized in that, The outer ring flame holes (1131) are adapted to eject gas and entrained air, the middle ring flame holes (1132) are adapted to eject gas and blast air, and the inner ring flame holes (1133) are adapted to eject gas and entrained air.

5. The gas stove according to claim 4, characterized in that, The flame generated by the outer ring flame holes (1131) is adapted to stabilize the flame of the middle ring flame holes (1132).

6. The gas stove according to claim 4, characterized in that, The outer ring flame holes (1131) are inclined downwardly and away from the center of the burner cap (1100), the middle ring flame holes (1132) are inclined downwardly and away from the center of the burner cap (1100), and the outer ring flame holes (1131) and the middle ring flame holes (1132) are exposed from the burner cap (1100) in the downward direction.

7. The gas stove according to claim 4, characterized in that, The distance between the inner edge and the outer edge of the outer ring flame holes (1131) in the radial direction of the burner cap (1100) is a, and the height difference in the axial direction of the burner cap (1100) is d, a≥1.5mm, d≤0.5a; The distance between the inner edge and the outer edge of the middle ring flame holes (1132) in the radial direction of the burner cap (1100) is b, and the height difference in the axial direction of the burner cap (1100) is f, b≥1.5mm, f≤0.5b; The distance in the radial direction of the burner cap (1100) between the inner edge of the outer ring flame holes (1131) and the outer edge of the middle ring flame holes (1132) is c, and the height difference in the axial direction of the burner cap (1100) is e, where c ≤ 4 mm and e ≤ 3c.

8. The gas stove according to claim 4, wherein The outer ring flame holes (1131) are in the shape of an annular slit, the middle ring flame holes (1132) are in the shape of an annular slit, and the outer ring flame holes (1131) surround the middle ring flame holes (1132).

9. The gas stove according to claim 4, wherein, 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 (3400). The burner head (1200) is provided with a first cavity (1210), a second cavity (1220) and a third cavity (1230). The burner cap (1100) is covered on the burner head (1200). The outer ring flame holes (1131) communicate with the first cavity (1210), the middle ring flame holes (1132) communicate with the second cavity (1220), and the inner ring flame holes (1133) communicate with the third cavity (1230). The first ejector tube (1310) communicates with the first cavity (1210), and the first ejector tube (1310) is adapted to eject air when receiving the gas from the first gas passage (2100). The second ejector tube (1320) communicates with the second cavity (1220), and the second ejector tube (1320) is adapted to receive the blast air from the blower (3400) when receiving the gas from the second gas passage (2200). The third ejector tube (1330) communicates with the third cavity (1230), and the third ejector tube (1330) is adapted to eject air when receiving the gas from the first gas passage (2100) or the second gas passage (2200).

10. The gas stove according to claim 9, characterized in that, The first cavity (1210) surrounds the second cavity (1220), and the second cavity (1220) surrounds the third cavity (1230); And / or, the burner head (1200) is an integrally formed part, and the first ejector tube (1310), the second ejector tube (1320) and the third ejector tube (1330) are respectively connected to the burner head (1200).

11. The gas stove according to claim 9, characterized in that, The burner cap (1100) includes a first burner cap (1110) and a second burner cap (1120). The first burner cap (1110) surrounds the second burner cap (1120). The first burner cap (1110) is a metal burner cap and is provided with the outer ring flame holes (1131) and the middle ring flame holes (1132). The second burner cap (1120) is an infrared burner cap and is provided with the inner ring flame holes (1133).

12. The gas stove according to claim 9, characterized in that, The outer sidewall of the burner cap (1100) is provided with a first fire hole (1140) communicating with the first cavity (1210), the first fire hole (1140) is lower than the outer ring fire hole (1131), and parts of the ignition needle (3100) and the induction needle (3200) are located in the opening direction of the first fire hole (1140).

13. The gas stove according to any one of claims 1 to 12, characterized in that, The ignition needle (3100) and the induction needle (3200) form an ignition and induction needle.

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