Gas stove with combustion efficiency adjustment function

Abstract

The present invention relates to a gas stove with adjustable combustion efficiency, comprising a burner, wherein the burner comprises a base, an outer ring fire cover, and an outer ring air mixing chamber is formed between the burner and the base, and a fire outlet hole is opened on the outer wall surface along the circumferential direction. The characteristic is that it also includes an adjusting member, which has an annular body, and the inner edge of the body is surrounded by a central hole for the top of the burner to pass through, and the top of the body is connected to an adjusting ring, and the adjusting ring can at least partially block the fire outlet hole area of ​​the outer ring air mixing chamber as the adjusting member moves. Compared with the prior art, the advantage of the present invention is that it provides an adjusting structure that can be adapted to the burner, the central hole of the adjusting member of the adjusting structure is for the burner top to pass through and then be installed, and the adjusting ring of the adjusting member can at least partially block the fire outlet hole of the burner, thereby achieving the speed of the mixed gas sprayed from the fire outlet hole of the burner when adjusting.

Description

Technical Field

[0001] The invention relates to the field of gas stoves, and in particular to a gas stove capable of adjusting combustion efficiency. Background Art

[0002] The primary air coefficient of existing atmospheric stove burners is generally 0.4-0.7. The premixed air cannot reach the amount of air required for complete combustion. In addition to various factors, a certain amount of secondary air supplement is required. In addition, in order to reduce CO emissions, the secondary air supplement should be as sufficient as possible. At present, there are various ways to supplement air for stove burners, generally including side air intake and bottom air intake. The side air intake method is to open a side air inlet on the side of the mixing chamber, and the external air is supplemented with secondary air through the side air inlet. The bottom air intake method is to open a bottom air inlet on the base, and the air under the stove is supplemented with secondary air through the bottom air inlet. Among them, although the side air intake method has the advantages of small air intake resistance and large air intake volume, the existing side air intake burners still have problems. For example, due to the entrainment of the combustion hot air flow, the inner and outer fire covers will draw in secondary air through the lateral air inlet of the mixing chamber. The inner ring has a small heat load and a higher primary air coefficient than the outer ring. Therefore, the entrained secondary air is often excessive, while the secondary air entrained by the middle ring fire hole of the outer ring fire cover is insufficient, and a large heat load cannot be achieved. In order to reasonably distribute the secondary air and achieve sufficient combustion of the inner and outer rings at the same time, further improvements are needed.

[0003] In addition, generally, according to the method of burning gas fuel in a gas boiler, such as a premixing burner, the gas and air are premixed in a mixing ratio most suitable for combustion, and then supplied to the surface of the fire hole for combustion. That is, after the mixed gas of the gas and air sprayed by the nozzle of the gas injection port flows into the mixing chamber, the mixed gas is supplied to the combustion chamber through the fire hole and burns in the combustion chamber. The conventional burner in the prior art includes a gas valve, which adjusts the gas pressure supplied to the burner, a nozzle, which sprays the gas supplied through the gas valve, a mixed gas flow inlet, through which the gas sprayed from the nozzle is mixed and supplied, an internal space of the burner, the mixed gas supplied through the mixed gas flow inlet is supplied to this internal space, and a fire cover including a plurality of fire holes to spray the mixed gas supplied to the internal space to the combustion chamber. When the load required by the combustion device is large, the gas valve is controlled so that the gas is supplied to the combustion chamber at high pressure to achieve the purpose of high output of the burner. Conversely, when the load required by the combustion device is small, the gas valve is controlled so that the gas is supplied to the combustion chamber at low pressure to achieve the purpose of low output of the burner. In this case, the speed of the mixed gas injected into the combustion chamber through the fire hole is subject to the gas pressure determined by the gas valve control. That is, if the gas pressure is high, the speed of the mixed gas injected through the fire hole is also high. However, according to the burner having the above-mentioned structure, when the load required by the combustion device is small, if the gas is supplied at a low pressure, since the injection speed injected into the interior of the combustion chamber is lower than the combustion speed of the mixed gas in the combustion chamber, a flame will be generated on the inner surface of the fire cover plate facing the interior of the combustion chamber. As a result, there is a problem of abnormal combustion, that is, flashback occurs. That is, if the speed of the mixed gas injected through the fire hole is less than a predetermined speed, flashback will occur to generate a flame inside the fire hole. However, it is difficult to meet the diversity of user needs through flow control, such as the Chinese utility model patent "A New Gas Stove High Fire Cover" with patent number ZL201620432553.9 (authorization announcement number CN205783145U), which includes a block body, and the middle part of the block body includes two hinged parts, the two hinged parts are block one and block two, and block one and block two each include a fire hole, and block one and block two are circular structures when they do not rotate relative to each other. The direction of the fire hole is adjusted by rotating block one relative to block two, and its main function is to facilitate concentrated firepower for cooking. It can be seen that its adjustment method is relatively simple and the firepower adjustment is also relatively limited. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a gas stove with adjustable combustion efficiency that can realize large heat load combustion of an outer ring fire cover in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a gas stove with adjustable combustion efficiency that can achieve reasonable distribution of secondary air from the side air intake of the inner and outer ring fire covers in response to the above-mentioned existing technical status.

[0006] The third technical problem to be solved by the present invention is to provide a gas stove with adjustable combustion efficiency, which can effectively prevent overflow during cooking from affecting the burner.

[0007] The fourth technical problem to be solved by the present invention is to provide a gas stove with adjustable combustion efficiency which can prevent flashback when the mixed gas has a low output, in view of the above-mentioned existing technical status.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: the gas stove with adjustable combustion efficiency includes a burner, and the burner includes:

[0009] Pedestal;

[0010] An outer ring fire cover is arranged on the base and forms an outer ring gas mixing chamber with the base, wherein the outer ring gas mixing chamber is provided with fire outlet holes along the circumferential direction on the outer wall surface;

[0011] The feature is that it also includes an adjusting member, which has a ring-shaped body, the inner edge of the body is surrounded by a central hole for the top of the burner to pass through, and the top of the body is connected to an adjusting ring, and the adjusting ring can at least partially block the fire outlet area of ​​the outer ring mixing chamber as the adjusting member moves.

[0012] The present invention is to solve the second technical problem, that is, in order to realize that the adjusting member can separate the secondary air supply channel of the burner, and can realize the reasonable distribution of the secondary air of the side air intake of the inner and outer ring fire covers. Preferably, the top of the main body is provided with partitions at intervals along the circumferential direction, and the top of the main body is provided with the partition at the part outside the adjusting circle. The adjusting circle is located on the partition and is spaced apart from the partition. The burner also includes an inner ring fire cover located inside the outer ring fire cover, and the inner ring fire cover is also arranged on the base, and a central air mixing chamber is formed between the inner ring fire cover and the base; an air supply cavity is formed between the central air mixing chamber and the outer ring air mixing chamber; a plurality of radial secondary air supply channels for connecting the air supply cavity with the outside are also provided on the base at intervals along the circumferential direction; the partition is arranged in the secondary air supply channel, and the partition can separate the secondary air supply channel into two relatively independent spaces, which are respectively connected to the fire outlet area of ​​the outer ring air mixing chamber and the outer wall area of ​​the central air mixing chamber.

[0013] The partition is arranged in the secondary air supply channel to separate the secondary air supply channel into relatively independent spaces. The air passes through the partition to form two independent air supply channels, which effectively avoids the irrational distribution of secondary air, such as excess secondary air in the inner ring and insufficient secondary air in the outer ring. The secondary air is forced to be diverted through the partition so that both the inner and outer rings can burn fully. It is especially suitable for an outer ring fire cover with two fire rings. The arrangement of the partition can avoid the mutual influence of secondary air between the inner ring and the outer ring on the one hand, and can also effectively replenish secondary air on the side of the outer ring fire cover adjacent to the air supply cavity on the other hand. , with accurate positioning, improving gas combustion efficiency, and the partition can recycle the heat of the mixing chamber, can preheat the secondary air, and help improve the thermal efficiency of the burner. At the same time, the adjustment ring and the partition move with the adjustment member. An adjustment ring that can move relative to the fire hole is provided outside the outer ring mixing chamber to adjust the air outlet area of ​​the fire hole, thereby adjusting the speed of the mixed gas injected into the outer ring mixing chamber instead of adjusting the amount of the mixed gas, that is, adjusting the injection speed of the mixed gas to be higher than the combustion speed of the mixed gas in the outer ring mixing chamber, and the speed of the mixed gas injected through the fire hole is adjusted to achieve a harmonious state without backfire.

[0014] The present invention is to solve the third technical problem. The technical solution adopted by the present invention is: the outer periphery of the body also has a vertical portion extending downward, which covers the part of the burner located below the partition. The gas stove also includes:

[0015] a panel having a mounting hole aligned with the central hole;

[0016] At least a part of the vertical portion of the adjusting member is located below the panel.

[0017] The adjusting member can move relative to the burner, so that the adjusting ring can at least partially block the fire outlet of the burner during the vertical movement relative to the burner, thereby adjusting the speed of the mixture sprayed to the burner instead of adjusting the amount of the mixture, that is, adjusting the injection speed of the mixture to be higher than the combustion speed of the mixture in the burner, and the speed of the mixture sprayed by the burner is adjusted to achieve a harmonious state without backfire; on the other hand, once the overflowed liquid overflowed during the cooking process flows into the mounting hole, it can be blocked outside the vertical portion due to the vertical portion of the adjusting member, so that the parts of the burner located below the inner edge, such as the base and the ejector tube, are not affected by the overflowed liquid.

[0018] Furthermore, in order to enable the adjusting member to change the firing area of ​​the burner, preferably, the following solution is adopted: the adjusting member can move vertically relative to the burner.

[0019] The partition may be arranged so as to divide the secondary air supply channel into at least two independent spaces in the axial up and down direction, or at least two independent spaces in the radial left and right direction. From the perspective of easy installation, preferably, the partition includes a partition, which is a horizontal partition.

[0020] In order to better realize the partitioning function of the partition, the inner end of the partition is folded upward.

[0021] In order to facilitate the vertical movement of the adjusting member relative to the burner, a driving mechanism is also included, which is located on the lower surface of the panel and drives the adjusting member to move vertically relative to the burner.

[0022] In order to adjust the gas outlet area of ​​the fire outlet of the outer ring fire cover according to the amount of mixed gas required by the burner, the driving mechanism includes a driving gear coaxially connected to the valve stem of the gas valve used for gas supply to the gas stove, a driven gear meshing with the driving gear, a convex wall corresponding to the linear adjustment of the gas valve protruding from the upper surface of the driven gear, and a connecting rod connected to the vertical part, the end of the connecting rod has a connecting part that can slide relative to the convex wall. In the process of the adjustment member moving relative to the burner, there are the following matching states:

[0023] Uncooked state: the separator is against the lower end surface of the secondary air supply channel, the driving gear and the driven gear do not rotate relatively, and the adjusting ring blocks the fire outlet of the outer ring fire cover to prevent dust, debris, etc. from falling into the installation hole. The vertical part of the adjusting member can block it outside the vertical part, so that the parts of the burner located below the inner edge, such as the base and the ejector tube, are not affected by dust and debris.

[0024] Cooking state: the driving gear and the driven gear rotate coaxially with the valve stem in the gas valve, so that the adjustment ring and the partition move with the adjustment member. An adjustment ring that can move relative to the fire outlet hole is provided outside the outer ring gas mixing chamber to adjust the gas outlet area of ​​the fire outlet hole, thereby adjusting the speed of the mixed gas injected into the outer ring gas mixing chamber instead of adjusting the amount of the mixed gas. This cooking state can be divided into the following two situations:

[0025] 1. Large heat load combustion of outer ring fire cover:

[0026] The partition is against the upper end surface of the secondary air supply channel, the adjustment ring does not cover the fire outlet hole of the outer ring fire cover, and the fire outlet hole is completely exposed. The partition and the vertical part of the adjustment member can completely cover the secondary air supply channel, so that the periphery of the fire outlet hole of the outer ring fire cover is all the secondary air supplied to the fire outlet hole of the outer ring fire cover, and the "competition" between the secondary air inside and outside during the lateral air intake is eliminated, thereby realizing the large heat load combustion of the outer ring fire cover. In addition, the secondary air of the inner ring fire cover is supplemented by the secondary air under the panel, and the secondary air under the panel is surrounded by the vertical part and enters the air supply cavity through the secondary air supplement channel to supplement the outer wall area of ​​the central mixing chamber.

[0027] 2. The inner and outer ring fire covers burn with reasonable distribution of secondary air:

[0028] When a low output is required, the partition is located in the middle of the secondary air replenishment channel and the adjustment ring partially blocks the fire outlet hole of the outer ring fire cover. At the same time, the adjustment ring and the fire outlet hole need to be in close contact when moving to prevent the leakage of the mixed gas. The leakage of the mixed gas can easily induce combustion instability and unevenness.

[0029] In order to achieve linear changes in the high output and low output of the burner of the partition and the adjustment ring along with the gas valve, the convex wall includes a first convex wall and a second convex wall symmetrically arranged with the central axis of the driven gear, and the first convex wall and the second convex wall both gradually protrude from bottom to top toward the center along the outer periphery of the driven gear, and then gradually extend downward from the center.

[0030] Preferably, from the perspective of simple installation structure, the connecting portion is a recessed notch that is concave upward from bottom to top.

[0031] Compared with the prior art, the advantage of the present invention is that it provides a gas stove with adjustable combustion efficiency. The central hole of the adjusting member is for the burner to pass through the top and then be installed. The adjusting ring of the adjusting member can at least partially cover the fire outlet of the burner, thereby adjusting the speed of the mixed gas sprayed from the fire outlet of the burner, that is, adjusting the injection speed of the mixed gas to be higher than the combustion speed of the mixed gas of the burner, and the speed of the mixed gas sprayed through the fire outlet is adjusted to achieve a harmonious state without backfire. In addition, the gas stove uses the adjusting structure to achieve the "dust-proof" effect of the gas stove in the non-cooking state, the "large heat load combustion" of the outer ring fire cover in the cooking state, and the effect of reasonable secondary air ratio, so that both the inner and outer rings can burn fully. It is particularly suitable for the outer ring fire cover with two rings of fire, which helps to improve the thermal efficiency of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an adjusting member in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A structural diagram from another angle;

[0034] Figure 3 for Figure 1 A cross-sectional view of

[0035] Figure 4 Schematic diagram of the structure of a gas stove in an embodiment of the present invention (the burner is omitted in one of them);

[0036] Figure 5 is a cross-sectional view of an embodiment of the present invention in which the adjusting member is in a non-cooking state during the process of moving relative to the burner;

[0037] Figure 6 It is a schematic diagram of the state in which the outer ring fire cover is burning under a large heat load in an embodiment of the present invention;

[0038] Figure 7 for Figure 6 A partial cross-sectional view of

[0039] Figure 8 It is a structural schematic diagram of the inner and outer ring fire covers in the embodiment of the present invention in a state of combustion with reasonable distribution of secondary air;

[0040] Fig. 9 for Figure 8 A partial cross-sectional view of . DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the accompanying drawings.

[0042] like Figures 1 to 9As shown, it is the best embodiment of the present invention. The gas stove with adjustable combustion efficiency in this embodiment includes an adjusting member 1, which has an annular body. The inner edge 11 of the body is surrounded by a central hole 111 for the top of the burner 5 to pass through. The top of the body is provided with partitions 2 at intervals along the circumferential direction. The top of the body outside the partition 2 is also connected with an adjusting ring 3. The adjusting ring 3 is located above the partition 2 and is spaced from the partition 2. The outer periphery of the body also has a vertical portion 12 extending downward to cover the portion of the burner 5 located below the partition 2. In order to enable the partition 2 of the adjusting member 1 to separate the secondary air supply channel 55 of the burner 5, to realize the reasonable distribution of the secondary air of the side air intake of the inner and outer ring fire covers 53 and to change the firing area of ​​the burner 5, the present embodiment preferably adopts the following scheme: the adjusting member 1 can move vertically relative to the burner 5, and the partition 2 can be arranged in a manner to divide the secondary air supply channel 55 into at least two independent spaces in the axial up and down directions, or at least two independent spaces in the radial left and right directions. From the perspective of easy installation, preferably, the partition 2 includes a partition, which is a horizontal partition. In order to better realize the partitioning effect of the partition, the inner end 21 of the partition is folded upward.

[0043] The present invention also provides a gas stove using the above-mentioned adjustment structure for a gas stove, comprising a panel 4 having a mounting hole 41 aligned with the central hole 111, and the adjustment member 1 at least partially has its vertical portion 12 located below the panel 4, and the adjustment member 1 can move relative to the burner 5, so that the adjustment ring 3 can at least partially block the fire outlet 532 of the burner 5 during the vertical movement relative to the burner 5, thereby adjusting the speed of the mixed gas sprayed to the burner 5 instead of adjusting the amount of the mixed gas, that is, adjusting the injection speed of the mixed gas to be higher than the combustion speed of the mixed gas in the burner 5, and the speed of the mixed gas sprayed by the burner 5 is adjusted to achieve a harmonious state without backfire; on the other hand, once the overflow during cooking flows into the mounting hole 41, it can be blocked outside the vertical portion 12 by the vertical portion 12 of the adjustment member 1, so that the parts of the burner 5 located below the inner edge 11, such as the base 51 and the ejector tube, are not affected by the overflow.

[0044] In addition, the gas stove includes a burner 5 located in the mounting hole 41, the burner 5 includes a base 51, an inner ring fire cover 52 arranged on the base 51 and forming a central air mixing chamber 521 with the base 51, and an outer ring fire cover 53 also arranged on the base 51, located on the periphery of the inner ring fire cover 52, and forming an outer ring air mixing chamber 531 with the base 51, and an air supplement chamber 54 is formed between the central air mixing chamber 521 and the outer ring air mixing chamber 531; a plurality of radial secondary air supplement channels 55 for connecting the air supplement chamber 54 with the outside are also provided on the base 51 at intervals along the circumferential direction, and the outer ring air mixing chamber 531 is provided with a plurality of radial secondary air supplement channels 55 for connecting the air supplement chamber 54 with the outside. A fire outlet hole 532 is provided on the outer wall surface 31 along the circumferential direction, and a partition 2 is provided in the secondary air supply channel 55, and the partition 2 can divide the secondary air supply channel 55 into two relatively independent spaces, which are respectively connected to the fire outlet hole 532 area of ​​the outer ring air mixing chamber 531 and the outer wall area of ​​the central air mixing chamber 521, and the adjustment ring 3 can at least partially block the fire outlet hole 532 area of ​​the outer ring air mixing chamber 531 as the partition 2 moves, wherein the partition 2 is provided in the secondary air supply channel 55 to divide the secondary air supply channel 55 into relatively independent spaces, and the air passes through the partition 2 to form two independent spaces. The partition 2 is used to forcibly divert the secondary air so that both the inner and outer rings can burn fully. It is particularly suitable for the outer ring fire cover 53 with two fire rings. The arrangement of the partition 2 can avoid the mutual influence of the secondary air between the inner ring and the outer ring on the one hand, and can effectively replenish the secondary air on the side of the fire hole 532 of the outer ring fire cover 53 adjacent to the air replenishment cavity 54 on the other hand, which has the advantages of accurate positioning and improved gas combustion efficiency. At the same time, the partition 2 can recycle the air in the mixing chamber. Heat can preheat the secondary air, which helps to improve the thermal efficiency of the burner 5. At the same time, the adjustment ring 3 and the partition 2 move with the adjustment member 1. An adjustment ring 3 is provided outside the outer ring mixing chamber 531 and can move relative to the ignition hole 532 to adjust the outlet area of ​​the ignition hole 532. The speed of the mixed gas injected into the outer ring mixing chamber 531 is adjusted instead of adjusting the amount of the mixed gas. That is, the injection speed of the mixed gas is adjusted to be higher than the combustion speed of the mixed gas in the outer ring mixing chamber 531. The speed of the mixed gas injected through the ignition hole 532 is adjusted to achieve a harmonious state without backfire.

[0045] In order to facilitate the vertical movement of the adjusting member 1 relative to the burner 5, a driving mechanism 6 is also included on the lower surface of the panel 4 to drive the adjusting member 1 to move vertically relative to the burner 5, wherein the driving mechanism 6 includes a driving gear 63 coaxially connected to a valve stem 62 in a gas valve 61 for gas supply to the gas stove, a driven gear 64 meshing with the driving gear 63, a convex wall 641 corresponding to the linear adjustment of the gas valve 61 is convexly provided on the upper surface of the driven gear 64, and a connecting rod 65 connected to the vertical portion 12, the end of the connecting rod 65 has a connecting portion 651 that can slide relative to the convex wall 641, so that the adjusting ring 3 can adjust the gas outlet area of ​​the fire hole 532 of the outer ring fire cover 53 according to the amount of mixed gas required by the burner 5, and the following matching states are present during the movement of the adjusting member 1 relative to the burner 5:

[0046] Uncooked state: the partition 2 abuts against the lower end surface of the secondary air supply channel 55, the driving gear 63 and the driven gear 64 do not rotate relative to each other, and the adjusting ring 3 blocks the fire outlet 532 of the outer ring fire cover 53 to prevent dust, debris, etc. from falling into the mounting hole 41. The vertical portion 12 of the adjusting member 1 blocks them outside the vertical portion 12, so that the parts of the burner 5 located below the inner edge 11, such as the base 51 and the ejector tube, are not affected by dust and debris.

[0047] Cooking state: the driving gear 63 and the driven gear 64 rotate coaxially with the valve stem 62 in the gas valve 61, so that the adjustment ring 3 and the partition 2 move with the adjustment member 1. By providing an adjustment ring 3 outside the outer ring gas mixing chamber 531 that can move relative to the fire outlet hole 532 to adjust the gas outlet area of ​​the fire outlet hole 532, the speed of the mixed gas injected into the outer ring gas mixing chamber 531 is adjusted instead of adjusting the amount of the mixed gas. This cooking state can be divided into the following two situations:

[0048] 1. Large heat load combustion of the outer ring fire cover 53:

[0049] The partition 2 is against the upper end surface of the secondary air supply channel 55, the adjustment ring 3 does not block the fire hole 532 of the outer ring fire cover 53, and the fire hole 532 is completely exposed. The partition 2 and the vertical portion 12 of the adjustment member 1 can completely block the secondary air supply channel, so that the periphery of the fire hole 532 of the outer ring fire cover 53 is all the secondary air supplied to the fire hole 532 of the outer ring fire cover 53, and the secondary air is eliminated. The internal and external "competition" of the secondary air during the lateral air intake, thereby realizing the large heat load combustion of the outer ring fire cover 53, and the secondary air of the inner ring fire cover 52 is supplemented by the secondary air under the panel 4 (refer to Figure 7 The secondary air under the panel 4 is surrounded by the vertical portion 12 and enters the air replenishment cavity 54 through the secondary air replenishment channel to replenish the outer wall area of ​​the central mixing chamber 521;

[0050] 2. The inner and outer ring fire covers 53 burn with the secondary air reasonably distributed:

[0051] When low output is required, the partition 2 is located in the middle of the secondary air supply channel and the adjustment ring 3 partially blocks the fire outlet 532 of the outer ring fire cover 53. At the same time, the adjustment ring 3 needs to be in close contact with the fire outlet 532 when moving to prevent the leakage of the mixed gas. The leakage of the mixed gas easily induces the instability and unevenness of combustion. In order to achieve the high output and low output of the partition 2 and the adjustment ring 3 of the burner 5 to change linearly with the gas valve 61, the convex wall 641 includes a first convex wall 6411 and a second convex wall 6412 symmetrically arranged with the central axis of the driven gear 64. The first convex wall 6411 and the second convex wall 6412 are both gradually protruding from the bottom to the center along the outer periphery of the driven gear 64, and then gradually extending downward from the center. From the perspective of simple installation structure, the connecting portion 651 is a notch that is concave upward from the bottom to the top.

[0052] The specific process is as follows: when the burner 5 is working, the adjusting ring 3 and the partition 2 of the adjusting structure can make the driving gear 63 and the driven gear 64 mesh and rotate with the linear change in the gas valve 61. Since the notch of the connecting rod 65 can slide relative to the driven gear 64, the adjusting member 1 can move vertically relative to the burner 5. The partition 2 of the adjusting member 1 can extend into the secondary air supply channel 55 of the burner 5. The adjusting ring 3 of the adjusting member 1 can at least partially block the ignition hole 532 of the burner 5, thereby adjusting the speed of the mixed gas ejected from the ignition hole 532 of the burner 5. That is, the injection speed of the mixed gas is adjusted to be higher than the combustion speed of the mixed gas of the burner 5, and the speed of the mixed gas injected through the fire outlet 532 is adjusted to achieve a harmonious state without backfire. In addition, in this process, the partition 2 can separate the secondary air supply channel 55, so as to provide the most suitable secondary air supply amount for the inner and outer ring fire covers 53 of the burner 5. Finally, the vertical part 12 of the adjustment structure can block the overflow or cleaning water to reduce the overflow or cleaning water entering the burner 5. When the partition 2 abuts against the upper end surface of the secondary air supply channel 55, the adjustment ring 3 The fire hole 532 of the outer ring fire cover 53 is not blocked, and the fire hole 532 is completely exposed. The partition 2 and the vertical portion 12 of the adjustment member 1 can completely block the secondary air replenishment channel, so that the periphery of the fire hole 532 of the outer ring fire cover 53 is all supplied with secondary air to the fire hole 532 of the outer ring fire cover 53, and the "competition" between the secondary air inside and outside during the lateral air intake is eliminated, thereby realizing the large heat load combustion of the outer ring fire cover 53. In addition, the secondary air of the inner ring fire cover 52 is supplemented by the secondary air under the panel 4, and the secondary air under the panel 4 is wrapped by the vertical portion 12. It surrounds and enters the air replenishment cavity 54 through the secondary air replenishment channel to replenish the outer wall area of ​​the central mixing chamber 521; in the final uncooked state, the partition 2 is against the lower end surface of the secondary air replenishment channel 55, the driving gear 63 and the driven gear 64 do not rotate relative to each other, and the adjustment ring 3 blocks the fire outlet 532 of the outer ring fire cover 53 to prevent dust, debris, etc. from falling into the mounting hole 41. The vertical portion 12 of the adjustment member 1 can block it outside the vertical portion 12, so that the parts of the burner 5 located below the inner edge 11, such as the base 51 and the ejector tube, are not affected by dust and debris.

Claims

1. A gas stove capable of adjusting combustion efficiency, comprising a burner (5), wherein the burner (5) comprises: Base (51); An outer ring fire cover (53) is arranged on the base (51) and forms an outer ring gas mixing chamber (531) with the base (51). The outer ring gas mixing chamber (531) has fire outlet holes (532) opened in the circumferential direction on the outer wall surface; Features: The invention also comprises an adjusting member (1), the adjusting member (1) having an annular body, the inner edge (11) of the body forming a central hole (111) for the top of the burner (5) to pass through, the top of the body being connected with an adjusting ring (3), the adjusting ring (3) being able to at least partially cover the ignition hole area of ​​the outer annular gas mixing chamber (531) as the adjusting member (1) moves; The top of the body is provided with partitions at intervals along the circumferential direction. The top of the body is provided with the partition (2) outside the adjustment ring (3). The adjustment ring (3) is located above the partition (2) and is arranged at intervals from the partition (2). The burner (5) further comprises an inner ring fire cover (52) located inside the outer ring fire cover (53). The inner ring fire cover (52) is also arranged on the base (51) and forms a central air mixing chamber (521) with the base (51); the central air mixing chamber (521) ) and the outer ring gas mixing chamber (531) form an air supplement chamber (54); the base (51) is also provided with a plurality of radial secondary air supplement channels (55) for connecting the air supplement chamber (54) with the outside at intervals along the circumferential direction; the secondary air supplement channel (55) is provided with the partition (2), and the partition (2) can separate the secondary air supplement channel (55) into two relatively independent spaces, which are respectively connected to the ignition hole (532) area of ​​the outer ring gas mixing chamber (531) and the outer wall area of ​​the central gas mixing chamber (521); It also includes a driving mechanism (6) located on the lower surface of the panel (4) for driving the adjusting member (1) to move vertically relative to the burner (5); The outer periphery of the body also has a vertical portion (12) extending downward, which covers the portion of the burner (5) located below the partition (2). The driving mechanism (6) includes a driving gear (63) coaxially connected to a valve stem (62) in a gas valve (61) for supplying gas to a gas stove, a driven gear (64) meshing with the driving gear (63), a convex wall (641) corresponding to the linear adjustment of the gas valve (61) protruding from the upper surface of the driven gear (64), and a connecting rod (65) connected to the vertical portion (12), the end of the connecting rod (65) having a connecting portion (651) that can slide relative to the convex wall (641); The convex wall (641) includes a first convex wall (6411) and a second convex wall (6412) which are symmetrically arranged with respect to the central axis of the driven gear (64); the first convex wall (6411) and the second convex wall (6412) both gradually protrude from bottom to top toward the center along the outer periphery of the driven gear (64), and then gradually extend downward from the center.

2. The gas stove with adjustable combustion efficiency according to claim 1, characterized in that: The panel (4) has a mounting hole (41) aligned with the central hole (111), and at least a part of the vertical portion (12) of the adjusting member (1) is located below the panel (4).

3. The gas stove with adjustable combustion efficiency according to claim 2, characterized in that: The adjusting member (1) can move vertically relative to the burner (5).

4. The gas stove with adjustable combustion efficiency according to claim 3, characterized in that: The partition (2) comprises a partition, which is a horizontal partition.

5. The gas stove with adjustable combustion efficiency according to claim 4, characterized in that: The inner end (21) of the partition is folded upward.

6. The gas stove with adjustable combustion efficiency according to claim 1, characterized in that: The connecting portion (651) is a notch that is concave upward from bottom to top.

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