CN211625409U - Heat shield for stove and gas stove with same - Google Patents

Abstract

The utility model relates to a stove is with separating heat exchanger and using the gas-cooker that has this stove with separating heat exchanger, including enclosing into the cover body that has the central hole, the cover body is including upper cover and the lower floor's cover that closes each other, and upper cover and lower floor's cover between be formed with cavity, its characterized in that: upper cover and lower floor's cover have along circumference's annular gap at the juncture of inner periphery or outer peripheral edge, be used for the intercommunication cavity and external, compare with prior art, the advantage lie in the utility model discloses a stove is with separating heat exchanger for open cavity, enables to make the air in the cavity take place the flow of small amplitude, can reduce heat conduction to lower floor's cover that upper cover gathered in the combustion process, has sufficient static air bed thickness to insulate against heat and avoids the convection heat transfer loss that the air flowed the production by a wide margin again in order to satisfy the annular gap, should separate heat exchanger and can supply secondary air to the outer fire hole of outer loop fire lid better.

Description

Heat shield for stove and gas stove with same

Technical Field

The utility model relates to a kitchen is with separating heat exchanger, the utility model discloses still relate to an use the gas-cooker that has this kitchen with separating heat exchanger.

Background

In the actual use process of the existing gas stove, because a pot is placed on a pot support for heating, and a certain space interval is formed between the pot and a burner, a part of heat energy generated by gas combustion is escaped to the surrounding environment except for heating the pot, so that energy waste is caused; in order to solve the problems, some heat collecting and energy gathering structures appear in China in recent years, for example, the Chinese utility model 'a heat shield for a stove and a stove using the heat shield for the stove' applied by the applicant, ZL201721665758.2(CN207962760U) discloses an annular cover body, which is characterized in that: the cover body is a double-layer structure consisting of an upper cover and a lower cover, the bottom of the lower cover is provided with a concave-convex structure to form a convex rib protruding downwards, a heat insulation cover for a stove is additionally arranged on the basis of the existing gas stove, the cover body is a double-layer structure consisting of the upper cover and the lower cover, the bottom of the lower cover is provided with a concave-convex structure to form a convex rib protruding downwards, the concave-convex structure is utilized to form a channel for separating the bottom of the lower cover into preheated secondary air, the gas combustion is promoted, the gas utilization rate is improved, the upper cover and the lower cover are connected in a closed manner, air in the lower cover does not flow, although the heat transfer from the upper cover to the lower cover is blocked, the lower cover is generally placed on a panel or a liquid containing disc of the gas stove, the heat gathered in the combustion process of a combustor is also easily transferred to the panel or the liquid containing disc, and the problem of, the heat collected in the upper cover cannot be sufficiently recovered and utilized.

In addition, since the primary air ratio of the conventional atmospheric burner is generally 0.4 to 0.7, the premixed air cannot reach the air amount required by the complete burner, and various factors are added, a certain secondary air ratio supplement is required, and the secondary air ratio supplement should be as sufficient as possible in order to reduce the emission of CO. At present, the mode that the cooking utensils combustor supplyed the air is diversified, generally has the side mode of admitting air and admitting air down, and the side air inlet mode is opened the side air intake at the lateral part of gas mixing chamber promptly, and the outside air carries out the secondary air through this side air intake and supplyes, and the air intake is opened down at the base seat promptly to the mode of admitting air down, and the air of cooking utensils below carries out the secondary air through this air intake down and supplyes. Although the side air intake mode has the advantages of small intake resistance and large intake air amount, the existing side air intake combustor still has the problems as follows: firstly, the inner ring area of the fire cover needs a large amount of secondary air, the secondary air is easily interfered by hot airflow after combustion and entrainment generated by an outer ring fire hole on the secondary air when flowing into the notch, the combustion is insufficient under the condition that the secondary air is not enough in flow, and the exhaust emission is high; secondly, the air supplement mode of the secondary air of the side air inlet of the existing burner is mainly aimed at the inner ring area, if the energy gathering ring is additionally arranged outside the burner, the supplement of the secondary air of the outer ring fire hole of the outer ring area is easily blocked, especially the supplement of the secondary air of the inner ring fire in the inner ring fire and the outer ring fire in the outer ring area, and further improvement is needed for improving the thermal efficiency of the inner ring and the outer ring area of the fire cover.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that provides a can reduce decurrent heat conduction loss's for kitchen range heat exchanger to above-mentioned prior art current situation.

The utility model aims to solve the second technical problem that it is smooth and easy to provide a side direction secondary air that ensures to provide to the combustor with heat exchanger to the kitchen to above-mentioned prior art current situation.

The third technical problem to be solved in the utility model is to provide an use the gas-cooker that has above-mentioned kitchen to use heat exchanger to above-mentioned prior art current situation.

For solving the first technical problem, the utility model discloses a technical scheme be: this kitchen is with separating heat exchanger, including the cover body that encloses into there being the central hole, the cover body is including upper cover and the lower floor's cover that closes each other, and upper cover and lower floor be formed with cavity, its characterized in that between the cover: the upper layer cover and the lower layer cover are provided with annular gaps along the circumferential direction at the junction of the inner periphery or/and the outer periphery and are used for communicating the cavity with the outside.

To reduce heat transfer between the upper and lower covers, preferably the upper cover has an inner end edge adjacent the central aperture, the lower cover has an inner end edge adjacent the central aperture, the inner end of the lower cover is circumferentially provided with at least two upwardly extending ribs at intervals, the ribs supporting the inner end edge of the upper cover to form the annular slot. Point contact is realized in a mode that the convex strips of the lower layer cover support the upper layer cover; because the cavity among the prior art can obstruct upper cover downward transmission heat to lower cover for closed cavity, but the cavity of this scheme not only is open cavity, it takes place the flow of small-amplitude to enable the air in the cavity, can reduce the heat conduction that upper cover gathers in combustion process to lower cover, in order to satisfy that the annular seam has sufficient static air bed thickness to insulate against heat and avoid the convection heat transfer loss that the air flowed the production by a wide margin, the annular seam needs to satisfy and is not more than 2mm, both can reduce the area of contact between the two layers, reduce the contact heat transfer loss, can guarantee the small-amplitude flow of air between the two layers again.

In order to avoid the overflow from entering the annular gap, it is preferable that the inner end of the lower layer cover extends upwards along the top to form an outer end edge, the raised strip is arranged on the annular raised wall, and the inner end edge of the upper layer cover is turned downwards to form an inward turned edge, and the inward turned edge can at least partially shield the annular raised wall.

To solve the second technical problem, it is preferable that the burring further has an inclined portion that gradually inclines upward from the outside to the inside. The inner flanging also has the function of guiding secondary air.

In addition to the above-mentioned annular slit formed between the upper and lower covers adjacent to the central hole and communicating with the outside and the cavity, the annular slit formed between the upper and lower covers on the side away from the central hole preferably has an outer end edge away from the central hole, the lower cover has an outer end edge away from the central hole, and the outer end edge of the lower cover is provided with at least two upwardly extending projections circumferentially spaced along the inner wall, the projections supporting the outer end edge of the upper cover to form the annular slit. The mode that the lug of the lower layer cover supports the upper layer cover realizes point contact, and can reduce the conduction of heat accumulated by the upper layer cover in the combustion process to the lower layer cover; annular slits which are communicated with the outside and the cavity are formed between the upper layer cover and the lower layer cover and are close to the central hole and far away from the central hole, the annular slits form an air supply channel corresponding to the fire outlet area of the outer fire hole, and air enters the annular slits close to the central hole from the annular slits far away from the central hole and can be preheated, so that the preheated air can be properly supplemented to the fire outlet area of the outer fire hole.

In order to avoid the overflow from entering the annular seam far away from the central hole, preferably, the outer end of the lower layer cover extends upwards along the top thereof to form an annular wall, the top end of the annular wall is lower than the top end of the projection, and the outer end edge of the upper layer cover is turned downwards to form a flanging which can at least partially shield the annular wall.

For solving the third technical problem, the utility model discloses still provide an use and have above-mentioned kitchen with gas-cooker of heat exchanger that separates, including flourishing liquid dish and combustor, its characterized in that: the cover body sets up on flourishing liquid dish and surrounds the combustor, the combustor includes:

a base having an outer ring gas passage;

the outer ring fire cover is arranged above the base, and a gas mixing chamber is formed between the outer ring fire cover and the base;

the outer fire holes are formed in the outer ring wall of the outer ring fire cover at intervals along the circumferential direction;

the method is characterized in that:

the annular gap at the junction of the inner periphery between the upper layer cover and the lower layer cover corresponds to the fire outlet area of the outer fire hole.

Furthermore, the upper layer cover and the lower layer cover are provided with annular gaps at the junctions of the inner periphery and the outer periphery so as to jointly form an air supply channel corresponding to the fire outlet area of the outer fire hole. The air entering from the annular gap on the outer periphery to the annular gap on the inner periphery can be preheated, so that the preheated air can be appropriately supplemented to the fire outlet area of the fire outlet hole.

Further, the side peripheral wall of the cover body gradually inclines outwards from inside to outside, and an included angle alpha between a tangent line of the side peripheral wall of the cover body and a horizontal plane and an included angle beta between an outer fire hole axis of the fire cover and the horizontal plane satisfy the following relation: beta is 0.8 to 0.9 alpha. Because the inclination angle of the side peripheral wall of the cover body plays a very critical role in the energy gathering effect of the heat insulation cover for the stove, and the angle relationship between the side peripheral wall of the cover body and the outer fire hole of the burner fire cover is particularly critical, the angle of the outer fire hole is too large, the inclined plane of the side peripheral wall of the cover body is too small, and the flame formed by the outer fire hole of the burner fire cover can burn the side peripheral wall of the cover body, so that secondary air cannot be supplemented, the burner is insufficient in combustion, and smoke is easy to exceed the standard; if the angle of the outer fire hole is too small and the inclined plane of the side peripheral wall of the cover body is too large, the energy-gathering effect of the side peripheral wall of the cover body is poor, and an included angle alpha between a tangent line of the side peripheral wall of the cover body and a horizontal plane and an included angle beta between the axis of the outer fire hole of the fire cover and the horizontal plane satisfy the following relation: beta is 0.8-0.9 alpha, so that the gas stove has good performance in terms of efficiency and smoke emission.

In order to prevent the cooking liquor from overflowing into the burner head, the outer fire hole, etc. of the burner, it is preferable that the upper surface of the bottom of the housing is gradually inclined downward from the inside to the outside in the radial direction to form a liquor holding region together with the side peripheral wall of the housing.

In order to better supplement secondary air to the root of the outer fire hole of the fire cover, preferably, the outer ring fire cover comprises an annular fire cover body, the fire cover body comprises an annular top wall, an inner ring wall vertically or obliquely extends downwards from the inner side edge of the annular top wall, an outer ring wall vertically or obliquely extends downwards from the outer side edge of the annular top wall, a flame stabilizing groove or a flame stabilizing hole is formed in the outer ring wall below the outer fire hole, and the highest point of the upper surface of the bottom of the cover body is lower than the lowest point of the flame stabilizing groove or the flame stabilizing hole. The highest point of the upper surface of the bottom of the cover body is lower than the lowest point of the flame stabilizing groove or the flame stabilizing hole, and secondary air can be supplemented to the flame stabilizing groove or the flame stabilizing hole.

Preferably, the height difference Δ h between the highest point of the upper surface of the bottom of the cover body and the lowest point of the flame stabilizing groove or the flame stabilizing hole is 1-4 mm. Delta h cannot be too small, and if delta h is too small, the secondary air quantity at the periphery of the fire cover is small, so that the supplement of the secondary air of the outer fire hole is easily influenced; if Δ h is not too large, the energy-gathering effect of the heat shield for the range is easily reduced.

Further, the outer ring wall comprises a first outer ring part below the flame stabilizing groove or the flame stabilizing hole, the first outer ring part gradually inclines upwards from outside to inside, an included angle gamma is formed between the first outer ring part and the horizontal plane, and gamma is larger than or equal to 65 degrees and smaller than or equal to 85 degrees. The first outer ring part can assist secondary air to be supplemented to the root parts of the flame stabilizing grooves or the flame stabilizing holes.

In order to better supplement the secondary air to the outer fire hole, the flame stabilizing groove or the flame stabilizing hole of the fire cover, the inner flanging is preferably provided with an included angle with the horizontal plane

And is

Also in order to achieve that the inner flange supplies secondary air to the outer flame hole flame stabilizing slot or flame stabilizing hole of the fire cover better, preferably, the distance d between the inner flange and the first outer ring part satisfies: d is more than or equal to 4mm and less than or equal to 8 mm.

Compared with the prior art, the utility model has the advantages that the heat shield for the stove is an open cavity, the air in the cavity can flow in a small range, the heat accumulated in the upper layer shield in the combustion process can be reduced to be conducted to the lower layer shield, in order to meet the requirement that the annular gap has enough thickness of a static air layer to insulate heat and avoid the convective heat transfer loss generated by the large-amplitude flow of air, meanwhile, the contact area between two layers can be reduced, the contact heat transfer loss is reduced, the small-amplitude flow of air between the two layers can be ensured, preheating the air entering through the annular gap at the junction of the inner periphery and/or the outer periphery, the utility model also provides a gas stove applying the heat shield for the stove, the annular seam of the heat shield for the stove at the junction of the inner periphery can properly supplement air to the outer fire hole of the outer ring fire cover, thereby improving the heat efficiency of the burner and avoiding the temperature rise of the liquid containing disc.

Drawings

FIG. 1 is a schematic front view of a heat shield for a range according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention showing an angle of a heat shield for a range;

FIG. 3 is a sectional view of another angle of the heat shield for the range according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of an upper shield of a heat shield for a range according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a lower shield of the heat shield for a range according to an embodiment of the present invention;

FIG. 6 is a schematic view showing a structure in which a heat shield and a burner for the range of FIG. 4 are placed on a liquid containing tray;

FIG. 7 is a cross-sectional view at an angle of FIG. 6;

FIG. 8 is a cross-sectional view at another angle to FIG. 6;

FIG. 9 is a schematic structural diagram of a connecting body according to an embodiment of the present invention;

fig. 10 is a schematic structural view of an outer ring fire cover in an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in FIGS. 1 to 10, the preferred embodiment of the present invention is shown. The heat shield for the kitchen range in the embodiment comprises a shield body 1 which is surrounded to form a central hole 10, the shield body 1 comprises an upper layer shield 11 and a lower layer shield 12 which are mutually folded, a cavity 13 is formed between the upper layer shield 11 and the lower layer shield 12, and the upper layer shield 11 and the lower layer shield 12 are provided with annular gaps along the circumferential direction at the junction of the inner periphery or the outer periphery for communicating the cavity 13 with the outside. This heat exchanger for kitchen use is open cavity 13, can make the air in the cavity 13 take place the flow of small amplitude, can reduce upper cover 11 heat conduction to lower floor cover 12 that gathers in the combustion process, it separates heat and avoids the convective heat transfer loss that the air flows the production by a wide margin again to have sufficient static air bed thickness in order to satisfy the circumferential weld, can also reduce area of contact between the two layers simultaneously, reduce the contact heat transfer loss, can guarantee again that the small amplitude of interlaminar air flows, preheat the air that gets into through the circumferential weld.

To reduce heat transfer between the upper and lower covers 11, 12, preferably, the upper cover 11 has an inner end edge 111 adjacent to the central hole 10, the lower cover 12 has an inner end edge 121 adjacent to the central hole 10, the inner end edge 121 of the lower cover 12 is circumferentially provided with at least two upwardly extending ribs 1211 at intervals, the ribs 1211 support the inner end edge 111 of the upper cover 11 to form an annular seam, i.e., an inner annular seam 14, and point contact is achieved by the ribs 1211 of the lower cover 12 supporting the upper cover 11; because cavity 13 among the prior art can obstruct upper cover 11 to lower floor cover 12 downward heat transfer for closed cavity 13, but cavity 13 of this scheme not only is open cavity 13, can make the air in cavity 13 take place the flow of small amplitude, can reduce the heat conduction that upper cover 11 gathered in the combustion process to lower cover 12, in order to satisfy that the annular seam has sufficient static air bed thickness to insulate against heat and avoid the heat convection loss that the air flows by a wide margin and produce, the annular seam needs to satisfy and is not more than 2mm, both can reduce the area of contact between the two layers, reduce the heat transmission loss of contact, can guarantee the small amplitude flow of air between the two layers again. In order to avoid the liquid overflowing into the annular gap, i.e. the inner annular gap 14, it is preferable that the inner end edge 121 of the lower shield 12 extends upward to form an annular convex wall 1212, the bead 1211 is disposed on the annular convex wall 1212, and the inner end edge 111 of the upper shield 11 is turned downward to form an inner flange 1111, and the inner flange 1111 can at least partially cover the annular convex wall 1212. The inward turned edge 1111 is also inclined upward from the outside to the inside to guide the secondary air. In addition to the above-mentioned inner annular seam 14 formed at the boundary of the inner peripheries of the upper layer cover 11 and the lower layer cover 12 for communicating the outside with the cavity 13, the outer annular seam 14 'formed at the boundary of the outer peripheries of the upper layer cover 11 and the lower layer cover 12 for communicating the outside with the cavity 13, the upper layer cover 11 has an outer end 112 away from the central hole 10, the lower layer cover 12 has an outer end edge 122 away from the central hole 10, the inner wall of the outer end edge 122 of the lower layer cover 12 is provided with at least two upward extending projections 1221 at intervals along the circumferential direction, the projections 1221 support the outer end 112 of the upper layer cover 11 to form the outer annular seam 14', and point contact is realized by the way that the projections 1221 of the lower layer cover 12 support the upper layer cover 11, so that the heat accumulated in the combustion process of the upper layer cover 11 can be reduced from being conducted to the lower layer cover 12; the upper layer cover 11 and the lower layer cover 12 are provided with annular slits at the junction of the inner periphery and the outer periphery to jointly form an air supply passage 7 corresponding to the fire outlet area of the outer fire hole 61, and air enters from the outer annular slit 14' far away from the central hole 10 to the inner annular slit 14 near the central hole 10 to be preheated, so that the preheated air can be appropriately supplied to the fire outlet area of the outer fire hole 61. In order to avoid the overflow entering the outer annular slit 14' far away from the central hole 10, it is preferable that the outer rim 122 of the lower cover 12 has an annular wall 1222 extending upward, the top end of the annular wall 1222 is lower than the top end of the projection 1221, and the outer edge 112 of the upper cover 11 is turned downward to form a turned-up edge 1121, and the turned-up edge 1121 can at least partially shield the annular wall 1222.

Referring to fig. 6 to 10, the utility model provides an use gas-cooker that has above-mentioned kitchen to separate heat exchanger, including flourishing liquid dish 2 and combustor 3, the cover body 1 sets up on flourishing liquid dish 2 and encloses combustor 3, combustor 3 is including the base 4 that has outer loop gas channel 41, set up on base 4, be platelike connector 5, outer loop fire lid 6 of setting on connector 5, this connector 5 has the opening 51 (as shown in fig. 9) that is linked together with outer loop gas channel 41, wherein the protruding wall support outer loop fire lid 6 that the periphery of opening 51 upwards extends, and open the outer fire hole 61 on outer loop wall 62 of outer loop fire lid 6 along circumference interval, the interior turn-ups 1111 peak of the cover body 1 aligns with the root of outer fire hole 61. Wherein, the upper layer cover 11 and the lower layer cover 12 are provided with annular slits at the junction of the inner periphery and the outer periphery to jointly form the air supply channel 7 corresponding to the fire outlet area of the outer fire hole 61, and air enters from the outer annular slit 14' far away from the central hole 10 to the inner annular slit 14 adjacent to the central hole 10 to be preheated, so that the preheated air can be appropriately supplied to the fire outlet area of the outer fire hole 61.

In addition, the side peripheral wall 15 of the cover body 1 gradually inclines outwards from inside to outside, and an included angle alpha between a tangent line of the side peripheral wall 15 of the cover body 1 and a horizontal plane and an included angle beta between the axis of the outer fire hole 61 of the fire cover and the horizontal plane satisfy the following relation: beta is 0.8 to 0.9 alpha. Because the inclination angle of the side peripheral wall 15 of the cover body 1 plays a very critical role in the energy-gathering effect of the heat shield for the kitchen range, and meanwhile, the angle relationship between the side peripheral wall 15 of the cover body 1 and the outer fire hole 61 of the fire cover of the burner 3 is very critical, the angle of the outer fire hole 61 is too large, the inclined plane of the side peripheral wall 15 of the cover body 1 is too small, the flame formed by the outer fire hole 61 of the fire cover of the burner 3 can burn the side peripheral wall 15 of the cover body 1, so that secondary air cannot be supplemented, the burner 3 is insufficient in combustion, and smoke is easy to exceed the standard; on the other hand, if the angle of the outer fire hole 61 is too small and the inclined plane of the side peripheral wall 15 of the cover 1 is too large, the energy-gathering effect of the side peripheral wall 15 of the cover 1 is deteriorated, and the included angle α between the tangent line of the side peripheral wall 15 of the cover 1 and the horizontal plane and the included angle β between the axis of the outer fire hole 61 of the fire cover and the horizontal plane satisfy the following relationship: beta is 0.8-0.9 alpha, so that the gas stove has good performance in terms of efficiency and smoke emission. In order to prevent the cooking liquor from overflowing into the burner of the burner 3, the outer fire hole 61, etc., the upper surface of the bottom of the housing 1 is inclined gradually downwards from the inside to the outside in the radial direction, forming a liquor holding area 8 together with the side peripheral wall 15 of said housing 1. In order to better supplement secondary air to the root of the outer fire hole 61 of the fire cover, the outer ring fire cover 6 comprises a ring fire cover body, the fire cover body comprises a ring top wall 63, the inner edge of the ring top wall 63 vertically or obliquely extends downwards to form an inner ring wall 64, the outer edge of the ring top wall 63 vertically or obliquely extends downwards to form an outer ring wall 62, the ring top wall 63 and the inner ring wall 64, the outer ring walls 62 jointly form a gas mixing cavity 65, the outer fire holes 61 are provided with at least two flame stabilizing grooves 66 or flame stabilizing holes which are arranged on the outer ring walls 62 at intervals along the circumferential direction, the outer ring walls 62 are provided with flame stabilizing grooves 66 or flame stabilizing holes communicated with the gas mixing cavity 65 below the outer fire holes 61, the highest point of the upper surface of the bottom of the cover body 1 is lower than the lowest point of the flame stabilizing grooves 66 or the flame stabilizing holes, and the highest point of the upper surface of the bottom of the cover body 1 is lower than the lowest point of the flame stabilizing grooves 66 or the flame stabilizing holes, so that secondary air can be supplemented to the flame stabilizing grooves 66 or the flame stabilizing holes. Preferably, the height difference Δ h between the highest point of the upper surface of the bottom of the cover 1 and the lowest point of the flame holding groove 66 or the flame holding hole is 1-4 mm. The delta h cannot be too small, and if the delta h is too small, the secondary air quantity at the periphery of the fire cover is small, so that the supplement of the secondary air of the outer fire hole 61 is easily influenced; if Δ h is not too large, the energy concentrating effect of the heat insulating cover for a range tends to be low, and Δ h in the present embodiment is 3 mm.

In addition, the outer ring wall 62 further includes a first outer ring 621 below the flame stabilizing slot 66 or the flame stabilizing hole, the first outer ring 621 gradually inclines upward from outside to inside, an included angle γ is formed between the first outer ring 621 and the horizontal plane, and γ is greater than or equal to 65 degrees and less than or equal to 85 degrees. The first outer ring 621 can assist the secondary air supply to the flame holding groove 66 or the root of the flame holding hole, and γ is preferably 70 °. In order to better supplement the secondary air to the flame stabilizing grooves 66 or the flame stabilizing holes of the outer flame holes 61 of the flame cover, the inner side edge of the cover body 1 is enclosed to form a central hole 10, the lower surface of the bottom of the cover body 1 is provided with at least two secondary air supplementing channels 8 which penetrate through the central hole 10 and the outside, the inner side edge of the cover body 1 is provided with an inward turned-over inner turned-over edge 1111, and the inner turned-over edge 1111 is also provided with an inclined part 111a which gradually inclines upwards from the outside to the inside along the air inlet of the secondary air supplementing channel 8 to the air outlet direction. Wherein the inclined portion 111a has an angle with the horizontal plane

And is

Preferably 70. Finally, in order to achieve the inner turned-up edge 1111 to better supplement the secondary air to the flame stabilizing groove 66 or the flame stabilizing hole of the outer flame hole 61 of the flame cover, the distance d between the inner turned-up edge 1111 and the first outer ring portion 621 satisfies: 4mm < d < 8mm, d is preferably 6mm, (the secondary air supply path can be referred to as the dashed arrow in FIG. 8), and the secondary air is also used in part to supply the fire area of the inner ring.

Claims (15)

1. The utility model provides a kitchen is with separating heat exchanger, is including enclosing cover body (1) that has central hole (10), cover body (1) is including upper cover (11) and lower cover (12) that involution each other to upper cover (11) and lower cover (12) between be formed with cavity (13), its characterized in that: the upper layer cover (11) and the lower layer cover (12) are provided with annular gaps along the circumferential direction at the junction of the inner periphery or/and the outer periphery for communicating the cavity (13) with the outside.

2. The cooktop heat shield of claim 1, wherein: the upper layer cover (11) is provided with an inner end edge (111) adjacent to the central hole (10), the lower layer cover (12) is provided with an inner end edge (121) adjacent to the central hole (10), the inner end edge (121) of the lower layer cover (12) is provided with at least two convex strips (1211) extending upwards at intervals in the circumferential direction, and the convex strips (1211) support the inner end edge (111) of the upper layer cover (11) to form the annular seam.

3. The cooktop heat shield of claim 2, wherein: the inner end of the lower layer cover (12) extends upwards along the top of the lower layer cover (121) to form an annular convex wall (1212), the convex strip (1211) is arranged on the annular convex wall (1212), the inner end edge (111) of the upper layer cover (11) is turned downwards to form an inward turned edge (1111), and the inward turned edge (1111) can at least partially shield the annular convex wall (1212).

4. The cooktop heat shield of claim 3, wherein: the inner flange (1111) is also provided with an inclined part which gradually inclines upwards from outside to inside.

5. The cooktop heat shield of claim 4, wherein: the inclined part forms an included angle with the horizontal plane

And is

6. The cooktop heat shield of claim 1, wherein: the upper layer cover (11) is provided with an outer end edge (112) far away from the central hole (10), the lower layer cover (12) is provided with an outer end edge (122) far away from the central hole (10), the outer end edge (122) of the lower layer cover (12) is provided with at least two lugs (1221) extending upwards at intervals along the circumferential direction, and the lugs (1221) support the outer end edge (112) of the upper layer cover (11) to form the annular seam.

7. The cooktop heat shield of claim 6, wherein: an annular wall (1222) extends upwards from the outer end of the lower layer cover (12) along the top of the lower layer cover (122), the top end of the annular wall (1222) is lower than the top end of the projection (1221), the outer end edge (112) of the upper layer cover (11) is turned downwards to form a flanging (1121), and the flanging (1121) can at least partially shade the annular wall (1222).

8. A gas range using the heat shield for range as claimed in any one of claims 1 to 7, comprising a panel and a burner (3), wherein the cover body (1) is disposed on the panel and surrounds the burner (3), and the burner (3) comprises:

a base (4) having an outer annular gas channel (41);

the outer ring fire cover (6) is arranged above the base (4) and forms a gas mixing chamber with the base (4);

the outer fire holes (61) are formed in the outer ring wall (62) of the outer ring fire cover (6) at intervals along the circumferential direction;

the method is characterized in that:

and the annular seam at the junction of the inner periphery between the upper layer cover (11) and the lower layer cover (12) corresponds to the fire outlet area of the outer fire hole (61).

9. The gas range of claim 8, wherein: the upper layer cover (11) and the lower layer cover (12) are provided with annular gaps at the junctions of the inner periphery and the outer periphery so as to jointly form an air supply channel (7) corresponding to the fire outlet area of the outer fire hole (61).

10. The gas range of claim 9, wherein: the side peripheral wall (15) of the upper layer cover (11) is gradually inclined outwards from inside to outside, and an included angle alpha between a tangent line of the side peripheral wall (15) of the upper layer cover (11) and a horizontal plane and an included angle beta between an axis of the outer fire hole (61) of the fire cover and the horizontal plane satisfy the following relations: beta is 0.8 to 0.9 alpha.

11. The gas range of claim 10, wherein: the upper surface of the bottom of the cover body (1) is gradually inclined downwards from inside to outside along the radial direction, and a liquid storage area (8) is formed together with the side peripheral wall (15) of the cover body (1).

12. The gas range according to any one of claims 9 to 11, wherein: the outer ring fire cover (6) comprises an annular fire cover body, the fire cover body comprises an annular top wall (63), an inner ring wall (64) vertically or obliquely extends downwards from the edge of the inner side of the annular top wall (63), an outer ring wall (62) vertically or obliquely extends downwards from the edge of the outer side of the annular top wall (63), a flame stabilizing groove (66) or a flame stabilizing hole is formed in the outer ring wall (62) below the outer fire hole (61), and the highest point of the upper surface of the upper layer cover (11) of the cover body (1) is lower than the lowest point of the flame stabilizing groove (66) or the flame stabilizing hole.

13. The gas range of claim 12, wherein: the height difference delta h between the highest point of the upper surface of the upper layer cover (11) of the cover body (1) and the lowest point of the flame stabilizing groove (66) or the flame stabilizing hole is 1-4 mm.

14. The gas range of claim 13, wherein: the outer ring wall (62) comprises a first outer ring part (621) below the flame stabilizing groove (66) or the flame stabilizing holes, the first outer ring part (621) gradually inclines upwards from outside to inside, an included angle gamma is formed between the first outer ring part (621) and a horizontal plane, and gamma is more than or equal to 65 degrees and less than or equal to 85 degrees.

15. The gas range of claim 14, wherein: the inner end edge (111) of the upper layer cover (11) is turned downwards to form an inner turned-up edge (1111), and the distance between the inner turned-up edge (1111) and the first outer ring part (621) meets the following requirements: d is more than or equal to 4mm and less than or equal to 8 mm.

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