Energy-gathering hood for stove and gas stove using the energy-gathering hood for stove

Abstract

The present invention relates to an energy-gathering hood for a stove, comprising a hood body in the shape of an annular disk, wherein the inner edge of the hood body forms an opening for secondary air to enter the inner periphery of the hood body, and the present invention is characterized in that it also comprises an adjusting member arranged on the inner edge of the hood body and capable of extending and retracting relative to the opening; an actuating member rotatably arranged on the lower surface of the bottom of the hood body and used for driving an adjusting ring to extend and retract relative to the opening; and an elastic member acting on the adjusting ring to make the adjusting ring have a tendency to extend outward. Compared with the prior art, the present invention has the advantage that the actuating member at the bottom of the hood body can drive the adjusting member to extend and retract relative to the opening formed within the hood body, so as to change the amount of secondary air entering the opening within the hood body, thereby achieving the effect of adjusting the amount of secondary air replenishment according to actual use needs, overcoming the problem of large smoke emission caused by the energy-gathering hood lowering the smoke exhaust port, and putting the burner in a stable and good combustion state.

Description

Technical Field

[0001] The invention belongs to the technical field of gas stoves, and relates to an energy-gathering cover for stoves and a gas stove having the energy-gathering cover for stoves. Background Art

[0002] In actual use of existing gas stoves, since the pot is placed on the pot support for heating, there is a certain space between the pot and the burner. In this way, in addition to being used to heat the pot, a considerable portion of the heat energy generated by the combustion of the gas escapes into the surrounding environment, causing energy waste. In order to solve the above problems, some heat-collecting and energy-gathering devices have appeared in China in recent years, such as "energy-gathering ring for gas stove and gas stove with the same" disclosed in Chinese patent CN203404823U, and "an energy-gathering gas stove" disclosed in Chinese patent CN204042984U, which also has an energy-gathering device. The energy pot bracket, the above-mentioned energy-gathering ring structure can reduce the consumption of heat energy to a certain extent, improve the thermal efficiency of the burner, and at the same time separate the smoke from the secondary air replenishment channel. For this reason, the above-mentioned energy-gathering ring is generally provided with a secondary air replenishment channel for replenishing secondary air, such as the "energy-gathering ring for gas stoves and gas stoves with the same" disclosed in Chinese patent ZL201320460471.1, which includes a first reflection ring and a second reflection ring that effectively increase the overall reflection and energy-gathering area of ​​the energy-gathering ring, and an air replenishment channel is provided between the upper end of the first reflection ring and the lower end of the second reflection ring. The problem of insufficient air supply during gas combustion can be solved by setting up an air supply channel. In order to reduce CO emissions, the secondary air supply should be as sufficient as possible and often excessive. Excessive secondary air supply will take away a large part of the heat energy generated by gas combustion. In addition to achieving the energy-gathering effect by adding an energy-gathering hood, the smoke outlet can also be lowered (the height of the smoke outlet refers to the distance from the highest plane of the edge of the energy-gathering hood to the bottom of the pot, that is, the effective height at which the smoke can be discharged). For example, the height of the smoke outlet of the existing energy-gathering hood is 10mm, so the smoke and heat that can be discharged If the height of the smoke outlet is reduced to 6mm, the smoke cannot be discharged smoothly, and the amount of smoke discharged will be reduced accordingly, causing the smoke to gather in the internal space from the bottom of the pot to the energy-gathering hood, thereby increasing the resistance of the secondary air replenishment channel to replenish the secondary air, and replenishment cannot be made, resulting in incomplete combustion and reduced thermal efficiency. At the same time, toxic and harmful gases such as carbon monoxide will also be produced; but if the secondary air replenishment channel is too large, the amount of secondary air sucked in is large, and the heat carried away by the smoke exhaust increases, resulting in low thermal efficiency; if the secondary air replenishment channel is too small, insufficient secondary air replenishment will inevitably lead to incomplete combustion and excessive smoke emissions. In order to ensure that the gas stove has very good performance in efficiency and smoke emissions under different user environments, that is, under the premise of lowering the smoke outlet, the ability to supplement an appropriate amount of secondary air has a great impact on the combustion conditions. Summary of the invention

[0003] A technical problem to be solved by the present invention is to provide a stove energy-gathering hood which can effectively adjust the air outlet volume of the secondary air replenishment channel and has strong adaptability in view of the above-mentioned existing technical status.

[0004] Another technical problem to be solved by the present invention is to provide a gas stove using the above-mentioned stove energy collecting hood in view of the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: the energy-gathering cover for a stove comprises a cover body in the shape of an annular disk, the inner edge of the cover body is surrounded by an opening for secondary air to enter the inner periphery of the cover body, and is characterized in that it also comprises:

[0006] An adjusting member, having a circumferential portion extending in the circumferential direction and arranged on the inner edge of the cover body, and capable of radially extending and contracting relative to the opening;

[0007] An actuator, disposed on the lower surface of the bottom of the cover body, and used to drive the adjustment ring to extend and retract relative to the opening;

[0008] The elastic member acts on the adjusting ring to make the circumferential portion of the adjusting member have a tendency to radially extend toward the center of the opening.

[0009] Furthermore, a connection seat for connecting the elastic member is provided on the upper surface of the bottom of the cover body, the adjusting member can slide radially relative to the connection seat, one end of the elastic member is connected to the connection seat, and the other end of the elastic member is connected to the adjusting member. The elastic member is connected through the connection seat provided on the upper surface of the bottom of the cover body to facilitate adjustment of the relative distance between the adjusting member and the opening.

[0010] In order to achieve the effect that the adjustment member can be extended and retracted relative to the opening, so as to achieve the effect of adjusting the secondary air supply volume according to actual use needs, the adjustment member can be extended and retracted relative to the opening as a whole, or it can be achieved in the following way: the adjustment member includes at least two adjustment strips that are surrounded in a circle, the connecting seat is T-shaped, the horizontal part of the connecting seat is connected to one end of the elastic member, and the vertical part of the connecting seat extends into the adjustment strip, and the adjustment strip can slide radially relative to the vertical part. Each adjustment strip can be adjusted separately in sections according to actual use.

[0011] In order to facilitate the sliding of the adjustment strip relative to the connecting seat, the adjustment strip has a socket for the vertical portion to extend into, and the two opposite side walls of the socket mouth are provided with guide grooves, and correspondingly, the two sides of the vertical portion have guide rails that cooperate with the guide grooves.

[0012] Furthermore, the top wall of each adjustment strip has an annular inner step, and the wall portion below the inner step constitutes the circumferential portion.

[0013] Furthermore, the actuator includes a sliding portion that can slide vertically relative to the lower surface of the bottom of the cover body and a touch portion that can trigger the adjustment strip to extend inward and outward relative to the opening, and when the sliding portion moves vertically upward relative to the lower surface of the bottom of the cover body, the touch portion can touch the adjustment strip and then trigger the elastic member to enter the energy storage state, and when the elastic member is in the energy release state, the adjustment strip has a tendency to extend outward into the opening. When the sliding portion slides downward relative to the lower surface of the bottom of the cover body, on the one hand, it can cause the touch portion to touch the adjustment strip, and on the other hand, it can indirectly serve as a "gate" of the secondary air inlet channel of the cover body to prevent the secondary air in the secondary air inlet channel from entering the opening from bottom to top.

[0014] Preferably, from the perspective of simple installation with the bottom of the cover body, and enabling each adjustment strip to synchronously extend or retract relative to the opening, the actuator includes an inverted "L"-shaped body, and a convex strip protrudes downward from the bottom of the cover body adjacent to the body, and the vertical arm of the body can rotate relative to the convex strip, and the vertical arm constitutes the sliding portion.

[0015] Furthermore, a convex wall is convexly provided on the upper end surface of the horizontal arm of the main body, and the convex wall has a slope inclined backward from top to bottom, and the convex wall constitutes the triggering portion. Correspondingly, the bottom of the adjustment strip has an inverted "V"-shaped notch. When the convex strip moves vertically upward relative to the lower surface of the bottom of the cover body, the convex wall can trigger the adjustment strip to slide from top to bottom along the convex wall until it slides to the middle tip of the notch, and the elastic member then enters the energy storage state.

[0016] The actuator body of the present invention drives the adjustment strip to extend and retract relative to the opening inward and outward and has the following two matching states:

[0017] In the radially retracted state away from the center of the opening, the convex strip of the actuator body moves vertically upward relative to the lower surface of the bottom of the cover body, and the convex wall of the actuator body can trigger the adjustment strip to slide down along the convex wall from top to bottom until it slides to the middle tip of the notch at the bottom of the convex strip, and the elastic member then enters the energy storage state;

[0018] In a state of radially extending toward the center of the opening, the convex strip of the actuator body moves vertically downward relative to the lower surface of the bottom of the cover body, and the adjustment strip slides from bottom to top along the convex wall under the action of the elastic member releasing energy. When the convex strip turns to the lowest position, the mutual contact between the adjustment strip and the convex wall can still be ensured, or when the elastic member has completed releasing the rebound force, the mutual contact between the adjustment strip and the convex wall can still be ensured.

[0019] In order to prevent the adjustment strip and the convex wall from being separated from each other when the elastic member has completed releasing the rebound force, a limiting member is also included, which acts on the adjustment member and limits the adjustment member when the adjustment member extends outward toward the opening to a set spacing distance.

[0020] There are a variety of options for limiting parts. From the perspective of simple structure and easy installation, the inner wall of the convex wall is hinged with a baffle. When the convex strip moves vertically downward relative to the lower surface of the bottom of the cover body, the baffle flips to be higher than the convex wall. The adjustment strip slides from bottom to top along the convex wall under the action of energy release of the elastic member until it slides to the position of the baffle.

[0021] In order to solve the second technical problem, the present invention provides a gas stove using the above-mentioned stove energy-gathering hood, comprising a gas stove panel and a burner, wherein the burner comprises an air mixing chamber and a secondary air inlet arranged on the air mixing chamber, and the hood body surrounds the burner with its inner edge and is placed on the gas stove panel, characterized in that: the adjusting member is arranged adjacent to the secondary air inlet.

[0022] In order to make the adjustment member also have the function of separating the secondary air inlet and prevent the inner and outer rings of the burner from influencing each other when replenishing secondary air, the adjustment member is lower than the highest point of the secondary air inlet but not lower than the lowest point of the secondary air inlet.

[0023] In order to better reflect heat energy and prevent affecting the flow of secondary air, when the adjusting member of the cover body extends outward into the opening, the radial gap δ between the adjusting member and the outer edge of the mixing chamber in the burner is 6.5-10.5 mm.

[0024] In order to increase the stability of the pot legs on the cover body, the top of the cover body is also provided with a socket for the pot legs to be inserted, and the pot legs are connected by an annular ring, and the adjacent pot legs, the annular ring and the outer peripheral wall of the cover together form a secondary air channel connecting the outside world and the secondary air inlet, and the secondary air in the secondary air channel can be blocked from entering the opening from bottom to top when the adjusting member can at least partially enter the opening in the radial direction. In addition, the adjusting member can also serve as a "gate" for the secondary air in the secondary air channel to enter the opening from bottom to top.

[0025] Compared with the prior art, the advantage of the present invention is that the actuator at the bottom of the cover body can drive the adjustment member to expand and contract inward and outward relative to the opening formed inside the cover body, so as to change the amount of secondary air entering the opening formed inside the cover body, thereby achieving the effect of adjusting the amount of secondary air replenishment according to actual use needs, overcoming the problem of large smoke emissions caused by the energy-gathering hood lowering the smoke exhaust port, and keeping the burner in a stable and good combustion state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure in which the energy-gathering cover for a stove in Embodiment 1 of the present invention is located outside the adjustment member and extends into the opening;

[0027] Figure 2 for Figure 1 A cross-sectional view of

[0028] Figure 3 This is a schematic diagram of the structure of a single adjustment bar in Example 1 of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure in which the energy-gathering cover for a stove in Embodiment 1 of the present invention is retracted into the opening of the adjusting member;

[0030] Figure 5 for Figure 4 A cross-sectional view of

[0031] Figure 6 This is a schematic structural diagram of a stove energy collecting cover in Embodiment 1 of the present invention, which is separated from the stove panel and the adjusting member extends outwardly into the opening;

[0032] Figure 7 for Figure 6 A cross-sectional view of

[0033] Figure 8 This is a cross-sectional view of the stove energy collecting cover in Example 1 of the present invention, which is separated from the stove panel and the adjusting member is retracted into the opening. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] like Figures 1 to 8 As shown, it is the best embodiment of the present invention. The energy-gathering hood for a stove includes a hood body 1 in the shape of an annular disk, and the inner edge of the hood body 1 is surrounded by an opening 11 for secondary air to enter the inner periphery of the hood body 1. It also includes an adjusting member 2 arranged on the inner edge of the hood body 1, having a circumferential portion 2301 extending circumferentially and arranged on the inner edge of the hood body 1, and capable of radially extending and retracting relative to the opening 11, an actuating member 3 rotatably arranged on the lower surface of the bottom of the hood body 1 and used to drive the adjusting ring to extend and retract inside and outside the opening 11, and an elastic member 4 acting on the adjusting member 2 so that the circumferential portion of the adjusting member 2 has a tendency to radially extend toward the center of the opening 11.

[0037] In this embodiment, the elastic member 4 is a compression spring. In order to facilitate the adjustment of the relative distance between the adjusting member 2 and the opening 11, a connecting seat 12 for connecting the compression spring is provided on the upper surface of the bottom of the cover body 1. The adjusting member 2 can slide radially relative to the connecting seat 12. One end of the compression spring is connected to the connecting seat 12, and the other end of the compression spring is connected to the adjusting member 2, so that the adjusting member 2 always has a tendency to extend radially toward the center of the opening 11. In order to realize that the adjusting member 2 can be extended and retracted relative to the opening 11 inward and outward, so as to achieve the effect of adjusting the secondary air replenishment amount according to actual use needs, the adjusting member 2 can be extended and retracted relative to the opening 11 inward and outward as a whole, or it can be realized in the following segmented manner: the adjusting member 2 includes at least two adjusting strips 21 that are surrounded in a circle, the connecting seat 12 is T-shaped, the transverse portion 121 of the connecting seat 12 is connected to one end of the elastic member 4, and the vertical portion 122 of the connecting seat 12 extends into the adjusting strip 21, and the adjusting strip 21 can radially slide relative to the vertical portion 122; in order to facilitate the sliding of the adjusting strip 21 relative to the connecting seat 12, the adjusting strip 21 has a socket 211 for the vertical portion 122 to extend into, and the two opposite side walls of the mouth of the socket 211 are provided with guide grooves 212, and correspondingly, the two sides of the vertical portion 122 are provided with guide rails 123 that cooperate with the guide grooves 212, and in this embodiment, the top wall of each adjusting strip 21 has an annular inner step 230, and the wall portion located below the inner step 230 constitutes a circumferential portion 2301.

[0038] The actuator 3 includes a sliding portion that can slide vertically relative to the lower surface of the bottom of the cover body 1 and a touch portion that can trigger the adjustment strip 21 to extend inward and outward relative to the opening 11. When the sliding portion moves vertically upward relative to the lower surface of the bottom of the cover body 1, the touch portion can touch the adjustment strip 21 and then trigger the elastic member 4 to enter the energy storage state. When the elastic member 4 is in the energy release state, the adjustment strip 21 has a tendency to extend outward into the opening 11. Specifically, the actuator 3 includes an inverted "L"-shaped body 31, and a convex strip 13 protrudes downward from the bottom of the cover body 1 adjacent to the body 31. The vertical arm 311 of the body 31 can rotate relative to the convex strip 13, and the vertical arm 311 constitutes the sliding portion. The upper end surface of the horizontal arm 312 of the main body 31 is convexly provided with a convex wall 313, and the convex wall 313 has an inclined surface 313a inclined backward from top to bottom. The convex wall 313 constitutes a triggering portion. Correspondingly, the bottom of the adjustment strip 21 has an inverted "V"-shaped notch 210. When the convex strip 13 moves vertically upward relative to the lower surface of the bottom of the cover body 1, the convex wall 313 can trigger the adjustment strip 21 to slide from top to bottom along the convex wall 313 until it slides to the middle tip portion 210a of the notch 210, and the compression spring then enters the energy storage state. When the sliding portion, i.e., the vertical portion, slides downward relative to the lower surface of the bottom of the cover body 1, on the one hand, it can cause the convex wall 313 of the touching portion to touch the adjusting strip 21, and on the other hand, it can also indirectly serve as a "gate" of the secondary air inlet channel of the cover body 1 to block the secondary air inlet channel from entering the opening 11 from bottom to top. The secondary air inlet channel of the cover body 1 of this embodiment is set in the following way: in order to increase the stability of the pot support leg 6 on the cover body 1, the peripheral wall of the cover body 1 is also provided with an installation opening 10 for the pot support leg 6 to be plugged in, and each pot support leg 6 is connected by an annular ring 7, and the adjacent pot support legs 6, the annular ring 7 and the outer peripheral wall of the cover body 1 together form a secondary air channel 8 connecting the outside world and the secondary air inlet 52.

[0039] The actuator body 31 of the present invention drives the adjustment strip 21 to extend radially inward and outward relative to the opening 11, and has the following two matching states:

[0040] In the radially retracted state away from the center of the opening, the convex strip 13 of the main body 31 of the actuator 3 moves vertically upward relative to the lower surface of the bottom of the cover body 1, and the convex wall 313 of the main body 31 of the actuator 3 can trigger the adjustment strip 21 to slide along the convex wall 313 from top to bottom until it slides to the middle tip portion 210a of the notch 210 at the bottom of the convex strip 13, and the elastic member 4 then enters the energy storage state;

[0041] In the radially extended state toward the center of the opening, the convex strip 13 of the main body 31 of the actuator 3 moves vertically downward relative to the lower surface of the bottom of the cover body 1, and the adjustment strip 21 slides from bottom to top along the convex wall 313 under the action of the elastic member 4 releasing energy. When the convex strip 13 turns to the lowest position, the mutual contact between the adjustment strip 21 and the convex wall 313 can still be ensured, or when the elastic member 4 has completed releasing the rebound force, the mutual contact between the adjustment strip 21 and the convex wall 313 can still be ensured.

[0042] The present invention also provides a gas stove using the above-mentioned energy-gathering cover for stoves, which includes a gas stove panel and a burner 5, wherein the burner 5 includes a base 50, an inner ring fire cover 501 arranged on the base 50 and forming a central air mixing chamber 51 with the base 50, an outer ring fire cover 502 arranged on the base 50, located on the periphery of the inner ring fire cover 501 and forming an outer ring air mixing chamber 51 with the base 50, and a supplementary air chamber 503 is formed between the central air mixing chamber 51 and the outer ring air mixing chamber 51, and the base 50 is also provided with a plurality of radial secondary air inlets 52 for connecting the supplementary air chamber 503 with the outside at intervals along the circumferential direction, the cover body 1 surrounds the burner 5 with its inner side edge and is placed on a liquid tray 9 on the gas stove panel, and the adjusting member 2 is arranged adjacent to the secondary air inlet 52. In order to make the adjusting member 2 also have the function of separating the secondary air inlet 52, the baffle of the adjusting member 2 is lower than the highest point of the secondary air inlet 52 but not lower than the lowest point of the secondary air inlet 52. In order to increase the stability of the cover body 1 when it is set on the stove, at least two support feet for supporting the cover body 1 extend downward from the inner edge of the cover body 1. In addition, when each adjustment strip 21 of the adjustment member 2 can partially enter the opening 11 in the radial direction, it can block the secondary air in the secondary air channel 8 from entering the opening 11 from bottom to top. The main reason why the gas stove using the energy-gathering cover can increase its thermal efficiency is that the energy-gathering cover body 1 effectively separates the smoke and the supplementary secondary air, and also regulates the flow direction of the secondary air. Figure 7 , the adjustment strips 21 of the energy-gathering cover are synchronously extended into the opening 11 from the outside to the inside, and the radial clearance δ between each adjustment strip 21 and the outer edge of the mixing chamber 51 in the burner 5 is 6.5 mm, which not only reduces the amount of secondary air supplied to the outer ring mixing chamber 51, but also reduces the amount of secondary air supplied to the inner ring mixing chamber 51; when it is necessary to increase the amount of secondary air, refer to Figure 8 For the sake of simplicity, only the secondary air intake of the secondary air channel 8 on one side (see the dotted arrow) and the path of the flue gas inside the burner 5 are shown. The adjustment strips 21 of the energy focusing cover are synchronously retracted radially from the inside to the outside to the opening 11, and the radial gap δ between each adjustment strip 21 and the outer edge of the mixing chamber 51 in the burner 5 is 10 mm.

[0043] Example 2

[0044] The structure is basically the same as that of Example 1, with the only difference being that in order to prevent the adjustment strip 21 and the convex wall 313 from being separated from each other when the elastic member 4 has completed releasing the rebound force, a limiting member is also included, which acts on the adjustment member 2. When the adjustment member 2 extends outward toward the opening 11 to a set spacing distance, the adjustment member 2 is limited. A baffle is hinged on the inner side wall of the convex wall 313. When the convex strip 13 moves vertically downward relative to the lower surface of the bottom of the cover body 1, the baffle flips to be higher than the convex wall 313. When the elastic member 4 is in the energy release state, the adjustment strip 21 slides from bottom to top along the convex wall 313 until it slides to the position of the baffle.

Claims

1. A stove energy-gathering hood, comprising a hood body (1) in the shape of an annular disk, wherein the inner edge of the hood body (1) is surrounded by an opening (11) for allowing secondary air to enter the inner periphery of the hood body (1), characterized in that Also included are: An adjusting member (2) having a circumferential portion (2301) extending in the circumferential direction and arranged on the inner edge of the cover body (1), and capable of radially expanding and contracting relative to the opening (11); An actuating member (3) is arranged on the lower surface of the bottom of the cover body (1) and is used to drive the adjusting member (2) to extend and retract inward and outward relative to the opening (11); An elastic member (4) acts on the adjusting member (2) so that the circumferential portion of the adjusting member (2) tends to extend radially toward the center of the opening (11); The upper surface of the bottom of the cover body (1) is provided with a connecting seat (12) for connecting the elastic member (4); the adjusting member (2) can slide radially relative to the connecting seat (12); one end of the elastic member (4) is connected to the connecting seat (12); and the other end of the elastic member (4) is connected to the adjusting member (2); The adjusting member (2) comprises at least two adjusting strips (21) arranged in a circle, the connecting seat (12) is T-shaped, a transverse portion (121) of the connecting seat (12) is connected to one end of the elastic member (4), and a vertical portion (122) of the connecting seat (12) extends into the adjusting strip (21), and the adjusting strip (21) can slide radially relative to the vertical portion (122); The adjustment strip (21) has a socket (211) for the vertical portion (122) to extend into, and two opposite side walls of the socket (211) are provided with guide grooves (212), and correspondingly, two sides of the vertical portion (122) have guide rails (123) that match the guide grooves (212); The top wall of each adjustment strip (21) has an annular inner step (230), and the wall portion below the inner step (230) constitutes the circumferential portion (2301); The actuating member (3) comprises a sliding portion capable of vertically sliding relative to the lower surface of the bottom of the cover body (1) and a triggering portion capable of triggering the adjusting strip (21) to extend and retract relative to the opening (11); and when the sliding portion is vertically moving upward relative to the lower surface of the bottom of the cover body (1), the triggering portion can trigger the adjusting strip (21) and then trigger the elastic member (4) to enter an energy storage state, and when the elastic member (4) is in an energy release state, the adjusting strip (21) has a tendency to extend outside the opening (11); The actuating member (3) comprises an inverted "L"-shaped body (31); a convex strip (13) protrudes downward from the bottom of the cover body (1) adjacent to the body (31); a vertical arm (311) of the body (31) is rotatable relative to the convex strip (13); and the vertical arm (311) constitutes the sliding portion; The upper end surface of the horizontal arm (312) of the main body (31) is provided with a convex wall (313) protruding upward, and the convex wall (313) has an inclined surface (313a) tilted backward from top to bottom. The convex wall (313) constitutes the trigger portion. Correspondingly, the bottom of the adjustment strip (21) has an inverted "V"-shaped notch (210). When the convex strip (13) moves vertically upward relative to the lower surface of the bottom of the cover body (1), the convex wall (313) can trigger the adjustment strip (21) to slide from top to bottom along the convex wall (313) until it slides to the middle tip portion (210a) of the notch (210), and the elastic member (4) then enters an energy storage state.

2. The energy concentrating hood for a stove according to claim 1, characterized in that: It also comprises a limiting member, which acts on the adjusting member (2) and limits the adjusting member (2) when the adjusting member (2) extends outward toward the opening (11) to a set spacing distance.

3. The energy concentrating hood for a stove according to claim 2, characterized in that: The inner side wall of the convex wall (313) is hinged with a baffle, and when the convex strip (13) moves vertically downward relative to the lower surface of the bottom of the cover body (1), the baffle flips to be higher than the convex wall (313), and the adjustment strip (21) slides from bottom to top along the convex wall (313) under the action of the energy release of the elastic member (4) until it slides to the position where the baffle is located.

4. A gas stove using the stove energy-gathering hood according to any one of claims 1 to 3, comprising a gas stove panel and a burner (5), wherein the burner (5) comprises an air mixing chamber (51) and a secondary air inlet (52) arranged on the air mixing chamber (51), and the hood (1) surrounds the burner (5) with its inner edge and is placed on the gas stove panel, characterized in that: The regulating member (2) is arranged adjacent to the secondary air inlet (52).

5. The gas stove according to claim 4, characterized in that: The regulating member (2) is lower than the highest point of the secondary air inlet (52) but not lower than the lowest point of the secondary air inlet (52).

6. The gas stove according to claim 5, characterized in that: When the adjusting member (2) of the cover body (1) extends outwardly into the opening (11), a radial clearance δ between the adjusting member (2) and the outer edge of the mixing chamber (51) in the burner (5) is 6.5 to 10.5 mm.

7. The gas stove according to claim 4, 5 or 6, characterized in that: The top of the cover body (1) is also provided with an installation opening (10) for inserting the pot legs (6), the pot legs (6) are connected by an annular ring (7), and the adjacent pot legs (6), the annular ring (7) and the outer peripheral wall of the cover body (1) together form a secondary air passage (8) connecting the outside world and the secondary air inlet (52), and when the regulating member (2) is at least partially able to enter the opening (11) in a radial direction, the secondary air in the secondary air passage (8) can be blocked from entering the opening (11) from bottom to top.

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