A gas stove

Abstract

This invention relates to a gas stove, comprising a base, a gas passage, and a first burner cap connected to the gas passage. The first burner cap includes a top wall and a peripheral wall extending from the periphery of the top wall into the gas passage. At least one ignition hole is provided on the peripheral wall corresponding to the position of the ignition needle. A portion of the top wall of the first burner cap extends outward along the radial direction of the first burner cap to form a protrusion that covers the ignition needle and ignition hole. A push rod is provided in the center of the top wall of the first burner cap. Under external force, the push rod can lift the burner cap to expose the ignition hole. Compared with the prior art, the advantage of this invention is that it provides a gas stove that can expose the ignition hole in the ignition state and hide it in the non-ignition state, preventing spillage or oil stains from clogging the ignition hole during cooking.

Description

Technical Field

[0001] This invention relates to the field of household kitchen appliances technology, and in particular to a gas stove that can improve the ignition success rate. Background Technology

[0002] Common household burners typically have an outer burner cap and an inner burner cap, along with ignition needles, thermocouples (or equivalent ionization needles), and other components to generate and maintain a flame. Existing burner outer burner cap structures generally include an outer burner cap body with multiple main flame channels. The lower end face of the outer burner cap body has a mixing chamber that communicates with the main flame channels, which form main flame holes on the outer end face of the outer burner cap body. Patent documents of this type can be found in Chinese Utility Model Patent No. ZL200520014838.2, entitled "A Conical Burner Cap for a Gas Stove Burner" (Authorization Announcement No. CN2842216Y), and also in Chinese Utility Model Patent No. ZL201120246965.0, entitled "A Burner Cap" (Authorization Announcement No. CN202149492U). This single main flame hole combustion method disclosed above suffers from the drawback of a flickering flame and an unstable combustion zone after combustion. Many existing technologies disclose external burner cap structures with flame stabilization functions, such as the Chinese utility model patent "A Second Burner Cap for a Gas Stove" (authorization announcement number CN201377835Y) with patent number ZL200920112857.7. In this patent, a flame stabilization hole is provided on the outer side of the external burner cap. The flame stabilization hole is located below the outer ring burner hole and is arranged alternately with the outer ring burner hole. The inner end of the flame stabilization hole is connected to the gas passage of the burner cap. The flame stabilizer orifice ensures stable combustion, but overflow liquid can easily enter the main burner orifice or flame stabilizer orifice, clogging the main burner or flame stabilizer channel. When a blocked orifice corresponds to the vicinity of the ignition needle, the gas stove fails to ignite. When a blocked orifice corresponds to the vicinity of the thermocouple (or an ionization sensor with equivalent function), the gas stove cannot maintain the flame. In addition, the ignition process of a traditional gas stove involves igniting the ejected gas through a high-voltage discharge from the ignition needle. That is, the ignition needle head generates an electric spark to ignite the gas ejected from the ignition orifice, which in turn ignites the gas on the burner cap. Although ignition is relatively quick, the excessively fast flow rate of the gas ejected from the ignition orifice can lead to flame lift-off or a decrease in the success rate of ignition. In summary, further improvements to the existing burner cap are needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a gas stove that can improve the ignition success rate in light of the above-mentioned existing technology.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: The gas stove includes a base, a gas channel formed on the base, and a first burner cap connected to the gas channel. The first burner cap includes a top wall and a peripheral wall extending from the periphery of the top wall into the gas channel. At least one ignition hole is opened on the peripheral wall corresponding to the position of the ignition needle. A portion of the top wall of the first burner cap extends outward along the radial direction of the first burner cap to form a protrusion that covers the ignition needle and ignition hole. A top rod is provided in the center of the top wall of the first burner cap. The base is provided with a central hole through which the end of the top rod passes. In the natural state, the protrusion rests on the gas channel and each ignition hole is covered by the gas channel. When the top rod lifts the first burner cap under the action of external force, each ignition hole is exposed.

[0005] From the perspective of ease of processing, preferably, the base includes an upper body, and an air inlet is provided in the center of the upper body. The gas passage is formed by the upward extension of the wall of the air inlet.

[0006] To slow down the gas velocity entering the gas passage and prevent it from flowing out of the ignition orifice too quickly, preferably, the base also includes a lower body for supporting the upper body. The lower body includes a centrally located support platform for supporting the upper body, and an inner ring wall spaced apart from the support platform. An inner air intake chamber is formed between the support platform and the inner ring wall. A central hole is located on the support platform, and support portions are symmetrically arranged around this central hole. A guide channel communicating with the inner air intake chamber is formed between adjacent support portions. The guide channel communicates with the gas passage through the air intake hole. Since the inner air intake chamber is located outside the guide channel, when the gas enters the guide channel through the inner air intake chamber, it is equivalent to "turning" from the outer ring into the guide channel before entering the gas passage. Its flow path becomes longer, and compared to the gas flowing directly out of the gas passage, its outflow velocity is slower, thereby ultimately improving the ignition success rate.

[0007] To ensure the gas stove burner can heat the pot bottom more evenly, it is equipped with two or three flame outlets. Preferably, the lower body also includes an outer ring wall located around the inner ring wall and spaced apart from it. The outer ring wall and the inner ring wall form an outer air intake chamber, which is independent of the inner air intake chamber. The outer air intake chamber is located outside the inner air intake chamber and can supply a mixture of gas and primary air to the flame outlets located on the periphery.

[0008] To facilitate the installation of the ignition needle, preferably, each of the mounting platforms is partially recessed to form a recessed portion, one of which has a mounting hole for installing the ignition needle. During installation, a mounting seat can be provided in the recessed portion, thus the mounting seat is hidden in the cavity formed by the upper and lower seats and the recessed portion, making the structure of the burner in the gas stove simpler.

[0009] To facilitate the flow of gas between the upper and lower seats, preferably, the upper seat is provided with an annular protrusion around the gas passage, and the annular protrusion is provided with at least two first flow holes that communicate with the outer air inlet cavity at intervals along the circumference.

[0010] Furthermore, an outer ring mixing chamber and a second flame cap are provided on the annular protrusion of the upper body.

[0011] To facilitate the installation of the second flame cap, which forms two or three flame outlets, and to facilitate matching with the annular boss, preferably, the outer annular mixing chamber directly uses the annular boss as its bottom wall, and extends upward on the inner and outer edges of the annular boss to form an inner periphery and an outer periphery. The inner and outer peripheries, together with the second flame cap, form an inner flame outlet and an outer flame outlet, respectively.

[0012] To ensure more uniform combustion within the cookware, a three-ring flame is preferably formed. The second flame cover includes an annular top wall, an inner peripheral wall extending downward from the inner edge of the annular top wall, and an outer peripheral wall extending downward from the outer edge of the annular top wall. A partition plate is provided in the middle of the annular top wall, which divides the outer annular mixing chamber into a first mixing chamber communicating with a first flow hole and a second mixing chamber communicating with a second flow hole. Correspondingly, the annular boss is provided with at least two second flow holes communicating with the inner air inlet chamber at circumferential intervals.

[0013] To facilitate the installation of the second flame cap and its matching with the inner and outer rings to form flame outlets or flame stabilizing holes, preferably, both the outer and inner peripheral walls are formed with radial first main flame grooves at intervals along the circumferential direction, with a gap between adjacent first main flame grooves, and each gap is also formed with radial second main flame grooves at intervals along the circumferential direction. The groove depth of the first main flame groove is greater than the groove depth of the second main flame groove. The first main flame grooves form inner flame outlets and outer flame outlets with the inner and outer rings, respectively, while the second main flame grooves form flame stabilizing holes with the inner and outer rings for stabilizing the inner and outer flame outlets.

[0014] Compared with the prior art, the advantages of the present invention are: it provides a gas stove that can expose the ignition hole in the ignition state and hide the ignition hole in the non-ignition state, so as to prevent the ignition hole from being blocked by spilled liquid or oil during cooking. The presence of a flame can be detected by the signal change of a thermocouple to control the on / off of the ignition hole. In addition, the protrusion above the ignition needle and the push rod that drives the movement are integrated into the first burner cap, so that it has a multi-functional function. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the burner structure in a gas stove according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 A schematic diagram of the decomposed structure;

[0017] Figure 3 This is a cross-sectional view of the burner in an embodiment of the present invention;

[0018] Figure 4 This is a cross-sectional view of the gas stove in an unlit state according to an embodiment of the present invention;

[0019] Figure 5 This is a cross-sectional view of the gas stove in the ignition state in an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of the lower seat in an embodiment of the present invention;

[0021] Figure 7 for Figure 6 A sectional view;

[0022] Figure 8 This is a schematic diagram of the upper seat in an embodiment of the present invention;

[0023] Figure 9 for Figure 8 A sectional view;

[0024] Figure 10 This is a schematic diagram of the structure of the second flame cap in an embodiment of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1-10The diagram shows the preferred embodiment of the present invention. The gas stove in this embodiment includes a base 1, a gas passage 22 formed on the base 1, and a first burner cap 6 connected to the gas passage 22. The first burner cap 6 includes a top wall 61 and a peripheral wall 62 extending from the periphery of the top wall 61 into the gas passage 22. At least one ignition hole 63 is provided on the peripheral wall 62 corresponding to the position of the ignition needle 7. A portion of the top wall 61 of the first burner cap 6 extends outward along the radial direction of the first burner cap 6 to form a protrusion 60 that covers the ignition needle 7 and the ignition hole 63. A push rod 64 is provided in the center of the top wall 61 of the first burner cap 6, and the base 1 has a central hole 34 through which the end of the push rod 64 passes. In its natural state, the protrusion 60 rests on the gas passage 22, and each ignition hole 63 is covered by the gas passage 22. When the push rod 64 lifts the burner cap under external force, each ignition hole 63 is exposed. Since the ignition hole 63 can be exposed when ignited and hidden when not ignited, the gas stove prevents liquid spillage or oil from clogging the ignition hole 63 during cooking. The presence of a flame can be detected by using the signal change of a thermocouple to control the on / off state of the ignition hole 63. In addition, the protrusion 60 above the ignition needle 7 and the push rod 64 that drives the movement are both integrated into the first burner cap 6, giving it a multi-functional function.

[0027] Specifically, the base 1 of this embodiment includes an upper body 2, with an air inlet 21 in the center of the upper body 2. The gas passage 22 is formed by the upward extension of the wall of the air inlet 21. The base 1 also includes a lower body 3 for supporting the upper body 2. The lower body 3 includes a support platform 31 located in the center to support the upper body 2 and an inner ring wall 32 spaced apart from the support platform 31. An inner air inlet cavity 33 is formed between the support platform 31 and the inner ring wall 32. A central hole 34 is located on the support platform 31, and support portions 35 are symmetrically arranged with the central hole 34 as the center. A guide channel 36 communicating with the inner air inlet cavity 33 is formed between adjacent support portions 35. The guide channel 36 is connected to the gas passage 22 through the air inlet 21. Since the inner air intake chamber 33 is located on the periphery of the air guide channel 36, when the gas enters the air guide channel 36 through the inner air intake chamber 33, it is equivalent to "turning a corner" from the outer ring into the air guide channel 36 and then entering the gas channel 22. Its flow path becomes longer, and compared to the gas flowing out directly from the gas channel 22, its outflow speed will be slower, so that the speed of the gas flowing out of the ignition hole 63 will not be too fast, thereby ultimately improving the ignition success rate.

[0028] In addition, in order to enable the burner of the gas stove to heat the bottom of the pot more evenly, it is equipped with two or three flame outlets. The lower body 3 also includes an outer ring wall 37 located around the inner ring wall 32 and spaced apart from the inner ring wall 32. The outer ring wall 37 and the inner ring wall 32 form an outer air inlet chamber 38 that is independently set apart from the inner air inlet chamber 33. The outer air inlet chamber 38 is located around the inner air inlet chamber 33 and can provide a mixture of gas and primary air to the flame outlets located on the periphery. In order to install the ignition needle 7, each support platform 31 is partially recessed to form a recess 310. One of the recesses 310 is provided with an installation hole 311 for installing the ignition needle 7. During installation, an installation seat can be provided in the recess 310. In this way, the installation seat is hidden in the cavity formed by the upper body 2 and the lower body 3 and the recess 310, making the structure of the burner in the gas stove simpler. Correspondingly, the upper body 2 is provided with an annular boss 23 on the periphery of the gas passage 22. The annular boss 23 is provided with at least two first flow holes 24 that communicate with the outer air inlet chamber 38 at intervals along the circumference, which can facilitate the gas flow between the upper body 2 and the lower body 3. An outer ring mixing chamber 4 and a second flame cap 5 are provided on the annular boss 23 of the upper body 2. From the perspective of facilitating the installation of the second flame cap 5 which forms two or three flame outlets and facilitating its matching with the annular boss 23, the outer ring mixing chamber 4 in this embodiment directly uses the annular boss 23 as the bottom wall, and an inner perimeter 25 and an outer perimeter 26 are formed on the inner and outer edges of the annular boss 23. An inner ring body 27 and an outer ring body 28, which together with the second flame cap 5 form the inner flame outlet and the outer flame outlet, are placed on the inner perimeter 25 and the outer perimeter 26. The second flame cap 5 includes an annular top wall 51, an inner peripheral wall 52 extending downward from the inner edge of the annular top wall 51, and an outer peripheral wall 53 extending downward from the outer edge of the annular top wall 51. A partition plate 54 is provided in the middle of the annular top wall 51. The partition plate 54 divides the outer annular mixing chamber 4 into a first mixing chamber 41 communicating with the first flow hole 24 and a second mixing chamber 42 communicating with the second flow hole 20. Correspondingly, the annular boss 23 is provided with at least two second flow holes 20 communicating with the inner air inlet chamber 33 at intervals along the circumference.

[0029] In this embodiment, to ensure more uniform combustion within the cookware, the burner preferably forms a three-ring flame. The outer peripheral wall 53 and inner peripheral wall 52 of the second burner cap 5 are both formed with radially spaced first main flame grooves 55 along the circumferential direction. Intervals 56 are formed between adjacent first main flame grooves 55, and each interval 56 is also formed with radially spaced second main flame grooves 57 along the circumferential direction. The groove depth of the first main flame groove 55 is greater than the groove depth of the second main flame groove 57. The first main flame grooves 55 form inner flame outlets and outer flame outlets with the inner ring body 27 and outer ring body 28, respectively. The second main flame grooves 57 form flame stabilizing holes with the inner ring body 27 and outer ring body 28, respectively, for stabilizing the inner flame outlets and outer flame outlets. Thus, simply placing the inner ring body 27, outer ring body 28, and second burner cap 5 from bottom to top is sufficient to form the inner flame outlets, outer flame outlets, and their corresponding flame stabilizing holes.

[0030] In summary, the ignition process of this gas stove is as follows: If a flame is detected in the gas stove, the on / off state of the ignition hole 63 is controlled by the signal change of a thermocouple. The ignition hole 63 is exposed during ignition and hidden during non-ignition to prevent spillage or oil from clogging it during cooking. The ignition hole 63 is exposed by lifting the first burner cap 6 under the action of the push rod 64. A transmission mechanism that drives the push rod 64 up and down can be installed in the gas stove, such as a worm gear structure, as is currently available. The gas passage 22 for the ignition hole 63 enters the gas guide passage 36 through the inner air intake chamber 33. It is equivalent to "turning" from the outer ring into the gas guide channel 36 and then into the gas channel 22. Its flow path becomes longer, and compared with the gas flowing out directly from the gas channel 22, its gas flow speed will be slower, so that the speed of flowing out of the ignition hole 63 will not be too fast, thereby ultimately improving the ignition success rate. The first burner cap 6 is only used for ignition, while the flame outlet for heating the pot is concentrated on the second burner cap 5. The partition plate 54 enables the second burner cap 5 to form an inner flame outlet on the inner side and an outer flame outlet on the outer side, as well as flame stabilizing holes for each flame. The outer air inlet chamber 38 set in the lower seat 3 provides the gas and primary air required for combustion.

Claims

1. A gas stove comprising a base (1), a gas passage (22) formed on the base (1), and a first burner cap (6) connected to the gas passage (22), characterized in that: The first fire cover (6) comprises a top wall (61) and a peripheral wall (62) extending from the peripheral edge of the top wall (61) into the gas passage (22), and at least one ignition hole (63) is formed in the peripheral wall (62) corresponding to the position of the ignition needle (7), the top wall (61) of the first fire cover (6) is partially extended outward along the radial direction of the first fire cover (6) to form a boss (60) which shields above the ignition needle (7) and the ignition hole (63), and a top rod (64) is arranged in the center of the top wall (61) of the first fire cover (6), and the base (1) is provided with a central hole (34) through which the end of the top rod (64) passes; in the natural state, the boss (60) rests on the gas passage (22) and each ignition hole (63) is shielded by the gas passage (22), and when the top rod (64) lifts the first fire cover (6) under the action of external force, each ignition hole (63) is exposed; The base (1) comprises an upper seat body (2), and a gas inlet hole (21) is arranged in the center of the upper seat body (2), and the gas passage (22) is formed by extending the hole wall of the gas inlet hole (21) upward; The base (1) further comprises a lower seat body (3) for supporting the upper seat body (2), the lower seat body (3) comprises a resting table (31) arranged in the center to support the upper seat body (2), and an inner ring wall (32) is arranged in the center to support the upper seat body (2), and an inner gas inlet cavity (33) is formed between the resting table (31) and the inner ring wall (32), the central hole (34) is arranged on the resting table (31), and a supporting part (35) is symmetrically arranged around the central hole (34), and a gas guide passage (36) is formed between adjacent supporting parts (35) and communicates with the inner gas inlet cavity (33), and the gas guide passage (36) communicates with the gas passage (22) through the gas inlet hole (21); The upper seat body (2) further comprises a second fire cover (5), the second fire cover (5) comprises an annular top wall (51), an inner peripheral wall (52) extending downward from the inner side edge of the annular top wall (51), and an outer peripheral wall (53) extending downward from the outer side edge of the annular top wall (51), the outer peripheral wall (53) and the inner peripheral wall (52) are both formed with radial first main fire grooves (55) at intervals along the circumferential direction, and the first main fire grooves (55) are formed with interval parts (56) between adjacent first main fire grooves (55), each interval part (56) is also formed with radial second main fire grooves (57) at intervals along the circumferential direction, the slotting depth of the first main fire grooves (55) is greater than the slotting depth of the second main fire grooves (57), the first main fire grooves (55) form inner and outer fire outlet holes with the inner ring body (27) and the outer ring body (28) respectively, and the second main fire grooves (57) form flame stabilizing holes for stabilizing the inner and outer fire outlet holes with the inner ring body (27) and the outer ring body (28) respectively.

2. Gas hob according to claim 1, characterized in that The lower seat body (3) further comprises an outer ring wall (37) arranged peripherally to and spaced from the inner ring wall (32), and an outer gas inlet cavity (38) is formed between the outer ring wall (37) and the inner ring wall (32) and is independent of the inner gas inlet cavity (33).

3. Gas hob according to claim 2, characterized in that Each of the rest tables (31) is partially concave to form a concave portion (310), and one of the concave portions (310) is provided with a mounting hole (311) for mounting an ignition needle (7).

4. Gas hob according to claim 3, characterized in that The upper seat body (2) is provided with an annular boss (23) peripherally to the gas passage (22), and the annular boss (23) is circumferentially spaced to be provided with at least two first flow-through holes (24) in communication with the outer gas inlet cavity (38).

5. The gas hob according to claim 4, characterized in that: The annular boss (23) of the upper seat body (2) is provided with an outer ring gas mixing chamber (4) and a second fire cap (5) arranged on the outer ring gas mixing chamber (4).

6. Gas hob according to claim 5, characterized in that The outer ring gas mixing chamber (4) directly takes the annular boss (23) as a bottom wall, and an inner periphery (25) and an outer periphery (26) are formed by extending upward on the inner edge and the outer edge of the annular boss (23), and the inner periphery (25) and the outer periphery (26) are arranged with an inner ring body (27) and an outer ring body (28) which jointly constitute inner and outer fire outlet holes with the second fire cap (5).

7. The gas hob according to claim 6, characterized in that: The annular top wall (51) is provided with a partition plate (54) in the middle, the partition plate (54) divides the outer ring gas mixing chamber (4) into a first gas mixing chamber (41) in communication with the first flow-through hole (24) and a second gas mixing chamber (42) in communication with the second flow-through hole (20), and correspondingly, the annular boss (23) is circumferentially spaced to be provided with at least two second flow-through holes (20) in communication with the inner gas inlet cavity (33).

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