CN211822619U - 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 the annular cover body, the inboard border of the cover body encloses into there is the central hole, the bottom of the cover body has two at least link up central hole and external secondary air tonifying qi passageway, its characterized in that: the inboard border of the cover body has the enstrophe of turning down, the enstrophe border the income gas port of secondary air tonifying qi passageway upwards extends to the gas outlet direction gradually, compares with prior art, the utility model has the advantages of establish because of enclosing of the heat exchanger that separates for the kitchen for the tonifying qi in outer ring district causes the influence outside the combustor, and the inboard border of the cover body has the enstrophe of turning down, and the enstrophe border secondary air tonifying qi passageway's income gas port upwards extends to the gas outlet direction gradually to improve the combustion efficiency of combustor to the outer ring district.

Description

Heat shield for stove and gas stove with same

Technical Field

The utility model relates to a domestic kitchen utensils and appliances technical field especially relates to a kitchen is with separating heat exchanger and using 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 mainly aims 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, and particularly, the supplement of the secondary air of the outer ring area needs to be further improved for improving the heat efficiency of the outer ring area of the fire cover.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that provide one kind to the smooth and easy kitchen range of side direction secondary air that the outer ring district of combustor provided with separate heat exchanger to above-mentioned prior art current situation.

The second technical problem to be solved by the present invention is to provide a gas cooker with the above heat shield for a kitchen range.

For solving the first technical problem, the utility model discloses the technical scheme who adopts is: this kitchen is with separating heat exchanger, including the annular cover body, the inboard border of the cover body encloses into there is the central authorities hole, the bottom of the cover body has at least two to link up central authorities hole and external, the radial secondary air tonifying qi passageway that sets up, its characterized in that: the inner side edge of the cover body is provided with an inward flange turned downwards, and the inward flange is provided with an inclined part gradually extending upwards along the air inlet of the secondary air supplementing channel to the air outlet direction.

In order to better realize air heat insulation, the cover body is preferably of a double-layer structure consisting of an upper layer cover and a lower layer cover, and a cavity is formed between the upper layer cover and the lower layer cover.

Further, the upper layer cover has an inner end edge adjacent to the central hole, the lower layer cover has an inner end edge adjacent to the central hole, and the inner end edge of the upper layer cover and the inner end edge of the lower layer cover have a first gap. 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, enable the air in the cavity to take place the flow of small amplitude, can reduce the heat conduction that upper cover gathers in the combustion process to lower cover, reducible lower cover downward conduction is to the panel or the heat on the liquid containing dish, be difficult for arousing the temperature rise problem of panel, 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 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 prevent the overflow liquid from entering the annular gap, preferably, the inner end edge of the upper layer cover is turned inwards towards the inner end edge of the lower layer cover to form the inward turning edge, and a second gap is formed between the lower end of the inward turning edge and the inner end edge of the lower layer cover. This second gap in turn ensures that air can enter the annular gap.

Because of the surrounding of the heat insulation cover for the stove, the air supplement of the outer ring area of the burner causes influence, preferably, the cavity between the upper layer cover and the lower layer cover is communicated with the central hole and the outside to be used as an air supplement channel, and the first gap and the second gap jointly form an air supplement port of the air supplement channel. Because the air between the upper layer cover and the lower layer cover flows in a small amplitude, the air can be supplied to the outer ring area of the combustor.

Further, the upper layer cover is further provided with an outer end edge far away from the central hole, the lower layer cover is further provided with an outer end edge far away from the central hole, a third gap is formed between the outer end edge of the upper layer cover and the outer end edge of the lower layer cover, and the third gap forms an air inlet of the air replenishing channel.

For solving the second technical problem, the utility model provides an use and have above-mentioned kitchen with gas-cooker that separates heat exchanger, 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 distance d between the highest point of the inner flanging of the cover body and the position of the root of the outer fire hole meets the following requirements: d is more than or equal to 4mm and less than or equal to 8 mm.

Further, the air supply channel corresponds to a fire outlet area of the outer fire hole.

Compared with the prior art, the utility model has the advantages of establish for reducing because of enclosing of the kitchen with thermal shroud for the tonifying qi in the outer ring district of combustor causes the influence, and the inboard edge of the cover body has the turn-ups to the enstrophe, and the turn-ups upwards extends to the gas outlet direction along the income gas port of secondary air tonifying qi passageway gradually, carries out the tonifying qi to the outer ring district better with the secondary air in the secondary air passageway, improves the combustion efficiency of combustor.

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 view of an outer ring fire cover in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a connector according to 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 an annular shield body 1, the shield body 1 is surrounded by a central hole 10, the shield body 1 is of a double-layer structure formed by an upper layer shield 11 and a lower layer shield 12, a cavity 13 is formed between the upper layer shield 11 and the lower layer shield 12, and an annular seam communicated with the outside and the cavity 13 is formed between the upper layer shield 11 and the lower layer shield 12 on at least one side close to the central hole 10 and/or far away from the central hole 10. 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.

In order to reduce the heat conduction between the upper cover 11 and the lower cover 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 provided with at least two ribs 1211 extending upwards at intervals along the circumferential direction of the inner end edge 121, the ribs 1211 support the inner end edge 111 of the upper cover 11 to form an inner annular seam 14, and point contact is realized by the way that the ribs 1211 of the lower cover 12 support the upper cover 11; the inner end edge of the upper shield 11 has a first gap 140 with the inner end edge of the lower shield 12. 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 prevent the overflow liquid from entering the inner annular slit 14, it is preferable that the inner end of the lower shield 12 extends upward along the top 121 to form an annular convex wall 1212, the protruding strip 1211 is disposed on the annular convex wall 1212, and the inner end edge 111, i.e. the inner side edge, of the upper shield 11 is turned downward to form an inner flange 1111, the inner flange 1111 can at least partially cover the annular convex wall 1212, and the inner flange 1111 extends gradually upward along the inlet of the secondary air supply passage 9 toward the outlet. The inner end edge 111 of the upper layer cover 11 is turned inwards towards the inner end edge 121 of the lower layer cover 12 to form an inward turned edge 1111, and a second gap 142 is formed between the lower end of the inward turned edge 1111 and the inner end edge 121 of the lower layer cover 12.

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 slit 14 formed between the upper cover 11 and the lower cover 12 and communicating the outside with the cavity 13 on the side adjacent to the central hole 10, an outer annular slit 14 'formed between the upper cover 11 and the lower cover 12 and communicating the outside with the cavity 13 on the side away from the central hole 10, the upper cover 11 having an outer end 112 away from the central hole 10, the lower cover 12 having an outer end edge 122 away from the central hole 10, at least two upwardly extending projections 1221 circumferentially spaced apart from the inner wall of the outer end edge 122 of the lower cover 12, the projections 1221 supporting the outer end 112 of the upper cover 11 to form the outer annular slit 14', point contact is achieved by supporting the upper cover 11 with the projections 1221 of the lower cover 12, and heat conduction accumulated in the upper cover 11 during combustion can be reduced to the lower cover 12; annular slits which are communicated with the outside and the cavity 13 are formed between the upper layer cover 11 and the lower layer cover 12 and are close to the central hole 10 and far away from the central hole 10, the annular slits form air supplementing passages 7 corresponding to the fire outlet areas of the outer fire holes 61, air enters the inner annular slits 14 close to the central hole 10 from the outer annular slits 14' far away from the central hole 10 and can be preheated, and therefore the preheated air can be supplemented to the fire outlet areas of the outer fire holes 61 properly. 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. The outer edge 112 of the upper cover 11 and the outer edge 122 of the lower cover 12 have a third gap 143, and the third gap 143 forms an air inlet of the air supply passage 7.

The utility model provides an use gas-cooker that has above-mentioned kitchen with 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 combustion flue 41, the connector 5 that sets up on base 4 and has the opening 51 that is linked together with outer loop gas combustion flue 41, the outer loop fire lid 6 of setting on connector 5, and set up outer fire hole 61 on outer rampart 62 of outer loop fire lid 6 along the circumference interval, the distance d that the root place position of the interior turn-ups 1111 highest point of the cover body 1 and outer fire hole 61 satisfies: d is 4mm ≦ d ≦ 8mm, preferably d ≦ 6 mm. Wherein, annular slits 14 communicating the outside and the cavity 13 are formed between the upper layer cover 11 and the lower layer cover 12 near the central hole 10 and far from the central hole 10, the annular slits 14 form the air supply channel 7 corresponding to the fire outlet area of the outer fire hole 61, and air enters from the annular slits 14 far from the central hole 10 to the annular slits 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 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 fire cover comprises an annular fire cover body, the fire cover body comprises an annular top wall 63, the inner edge of the annular top wall 63 vertically or obliquely downwards extends to form an inner annular wall 64, the outer edge of the annular top wall 63 vertically or obliquely downwards extends to form an outer annular wall 62, the annular top wall 63 and the inner annular 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 groove 66 or the flame stabilizing hole of the outer fire hole 61 of the fire 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 9 which penetrate through the central hole 10 and the outside, the inner side edge of the cover body 1 is provided with an inward flanging 1111 which turns downwards, the inward flanging 1111 gradually extends upwards along the air inlet of the secondary air supplementing channel 9 to the air outlet direction, and the inclined part 111a and the horizontal plane form an included angle

And is

Preferably 70. Finally, in order to realize that the inner flange 1111 supplies the secondary air to the flame stabilizing groove 66 or the flame stabilizing hole of the outer flame hole 61 of the flame cover better, the distance d between the inner flange 1111 and the first outer ring portion 621 satisfies: d is more than or equal to 4mm and less than or equal to 8mm, and d is preferably 6 mm.

Claims (8)

1. The utility model provides a kitchen is with heat exchanger that separates, including annular cover body (1), the inboard border of cover body (1) encloses into central hole (10), the bottom of the cover body (1) has at least two to link up central hole (10) and external, the radial secondary air tonifying qi passageway (9) that set up, its characterized in that: the inner side edge of the cover body (1) is provided with an inward flanging (1111) which is turned downwards, and the inward flanging (1111) is provided with an inclined part (111a) which gradually extends upwards along the air inlet of the secondary air supplementing channel (9) towards the air outlet.

2. The cooktop heat shield of claim 1, wherein: the mask body (1) is of a double-layer structure consisting of an upper layer mask (11) and a lower layer mask (12), and a cavity (13) is formed between the upper layer mask (11) and the lower layer mask (12).

3. The cooktop heat shield of claim 2, 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), and the inner end edge (111) of the upper layer cover (11) and the inner end edge (121) of the lower layer cover (12) are provided with a first gap (141).

4. The cooktop heat shield of claim 3, wherein: the inner end edge (111) of the upper layer cover (11) is inwards turned towards the inner end edge (121) of the lower layer cover (12) to form the inward turned edge (1111), and a second gap (142) is formed between the lower end of the inward turned edge (1111) and the inner end edge of the lower layer cover (12).

5. The cooktop heat shield of claim 4, wherein: the cavity (13) between the upper layer cover (11) and the lower layer cover (12) is communicated with the central hole (10) and the outside and serves as an air supplementing channel (7), and the first gap (141) and the second gap (142) jointly form an air supplementing port of the air supplementing channel (7).

6. The cooktop heat shield of claim 5, wherein: the upper layer cover (11) is further provided with an outer end edge far away from the central hole (10), the lower layer cover (12) is further provided with an outer end edge (122) far away from the central hole (10), a third gap (143) is formed between the outer end edge (112) of the upper layer cover (11) and the outer end edge (122) of the lower layer cover (12), and the third gap (143) forms an air inlet of the air replenishing channel (7).

7. A gas stove with the heat shield for the stove according to any one of claims 1 to 6, comprising a liquid containing disc (2) and a burner (3), wherein the cover body (1) is arranged on the liquid containing disc (2) 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:

the distance d between the highest point of the inner flanging (1111) of the cover body (1) and the position of the root of the outer fire hole (61) meets the following requirements: d is more than or equal to 4mm and less than or equal to 8 mm.

8. The gas range of claim 7, wherein: the air supply channel corresponds to the fire outlet area of the outer fire hole (61).

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