CN218864298U

CN218864298U - Heat shield for stove

Info

Publication number: CN218864298U
Application number: CN202222639032.9U
Authority: CN
Inventors: 余参参; 王帅东; 刘晓刚; 俞瑜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-04-14
Anticipated expiration: 2032-09-30

Abstract

The utility model relates to a kitchen is with separating heat exchanger, including the cover body, the bottom of the cover body has along the stabilizer blade of circumference distribution, forms secondary air inlet channel, its characterized in that between the adjacent stabilizer blade: the bottom periphery of the cover body or adjacent to the bottom periphery thereof correspond each secondary air inlet channel and are provided with downwardly extending's extension respectively, offer the secondary air inflow entrance that supplies the secondary air inflow on the extension, compare with prior art, the utility model has the advantages of: the top periphery of the heat shield or the periphery near the top of the heat shield is provided with an upper extension part, so that the secondary air channel formed by the external secondary air passing through the extension part is narrowed, and the channel sectional area is obviously reduced, thereby having the following advantages: 1. the air inlet resistance is increased, the supplement amount of secondary air is reduced, and the reduction of excess air is beneficial to reducing the heat taken away by a large amount of smoke; 2. the space diminishes, and secondary air velocity can improve, and the velocity of flow improves and does benefit to the heat transfer.

Description

Heat shield for stove

Technical Field

The utility model relates to a domestic kitchen utensils and appliances field especially relates to a separate heat exchanger for gas-cooker.

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, the heat energy generated by gas combustion is used for heating the pot, and a considerable part of the heat energy is dissipated to the surrounding environment, so that energy waste is caused; in order to solve the problems, heat collection and energy collection are generated in China in recent years, for example, the Chinese utility model patent with the patent number ZL201820852191.8 (with the publication number CN 208804732U) applied by the applicant comprises an annular cover body, wherein the bottom of the cover body is provided with at least three support legs, a secondary air inlet channel communicated with the inside and the outside is formed between the adjacent support legs, the aperture of the secondary air inlet channel is wide at the bottom and narrow at the top, and the aperture of the secondary air inlet channel is wide at the bottom and narrow at the top, so that a unique long and flat secondary air inlet channel is formed; in addition, the upper part of the secondary air inlet channel is narrow, so that the contact between the upper part of the air mixing chamber of the burner and the external secondary air can be reduced, while the lower part of the secondary air inlet channel is wide, so that the air inlet area of the lower part of the secondary air inlet channel can be increased, and the problem of air inlet area reduction caused by the upper part of the secondary air inlet channel is solved.

However, the gas stove is generally placed in a ventilation position of a kitchen and is used with a range hood, and the range hood is always in a smoke exhaust state in the cooking process, so that secondary air required by the gas stove is also sucked away under the suction action of the range hood, secondary air supplement of a combustor is influenced, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a thermal shroud is used to kitchen that secondary air supplyed in the difficult influence culinary art process is provided to above-mentioned prior art current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this heat exchanger is used to kitchen, including the cover body, the bottom of the cover body has the stabilizer blade that distributes along circumference, forms secondary air inlet channel, its characterized in that between the adjacent stabilizer blade: the bottom periphery of the cover body or the periphery close to the bottom of the cover body is provided with extension parts extending downwards corresponding to the secondary air inlet channels respectively, and secondary air inlets for secondary air to flow in are formed in the extension parts.

In order to enable the secondary air to flow in more uniformly, it is preferable that the extension portion is a rib provided at an interval, and an interval between adjacent ribs constitutes the secondary air inflow port.

In order to realize that each rib can guide secondary air and simultaneously can avoid it to receive the influence of lampblack absorber suction flue gas effect, preferably, each rib is the V type structure of side-set, and the joint end including first stabilizer blade, second stabilizer blade and two stabilizer blades is located the middle most advanced position of V style of calligraphy promptly, first stabilizer blade extends from middle most advanced portion slant outward, the second stabilizer blade extends from middle most advanced portion slant inward. The first support leg and the second support leg extend inwards and outwards from the middle tip part in an oblique direction respectively, secondary air is guided in different directions, and meanwhile a sealing area in a certain area is formed due to the V-shaped side of the first support leg and the second support leg, so that the guided secondary air can be prevented from being influenced by suction of the range hood.

In order to strengthen the first support leg to avoid the introduced secondary air from being influenced by the suction of the range hood, the distance L1 between the outermost end of the first support leg and the middle tip part is preferably greater than the distance L2 between the innermost end of the second support leg and the middle tip part.

In order to increase the heat insulation effect of the cover body, preferably, the cover body is a double-layer structure formed by an upper layer cover and a lower layer cover, a cavity is formed between the upper layer cover and the lower layer cover, and the lower layer cover is provided with a concave-convex structure at least at three positions corresponding to the bottom wall of the cavity to form the support legs distributed along the circumferential direction.

In order to prevent the fire hole from being blocked by the overflowing liquid generated during the cooking process, it is preferable that the upper cover has a convex structure protruding upward at the center thereof, and the convex structure forms a liquid storage region together with the outer circumferential wall.

Further, the inner edge and the outer edge of the upper layer cover and/or the lower layer cover are provided with annular slits communicated with the outside and the cavity. This kitchen is with separating heat exchanger 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 floor's cover, 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 annular seam, 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 air between the two-layer flows, preheat the air that gets into through the annular seam.

Compared with the prior art, the utility model has the advantages of: the top circumference of the heat shield or the circumference near the top is provided with an upper extension part, so that the secondary air channel formed by the external secondary air passing through the extension part is narrowed, and the cross section area of the channel is obviously reduced, thereby having the following advantages: 1. the air inlet resistance is increased, the supplement amount of secondary air is reduced, and the reduction of excess air is beneficial to reducing the heat taken away by a large amount of smoke; 2. the space is reduced, the secondary air flow rate is increased, the flow rate is increased, heat exchange is facilitated, a better secondary air preheating effect is achieved, and the heat efficiency can be improved by preheating the secondary air; 3. can reduce the influence of the smoke suction effect of the range hood.

Drawings

Fig. 1 is a schematic structural view of a heat shield according to embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view at an angle from FIG. 1;

FIG. 3 is a schematic view of another angle of the heat shield of FIG. 1;

fig. 4 is a schematic structural view of a heat shield according to embodiment 2 of the present invention;

fig. 5 is a schematic structural view of another angle of the heat shield according to embodiment 2 of the present invention.

Detailed Description

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

Example 1

As shown in fig. 1 to 3, embodiment 1 of the present invention is described. The heat shield for kitchen range of this embodiment is including the cover body 1, and the bottom of the cover body 1 has along the stabilizer blade 131 of circumference distribution, forms secondary air inlet channel 15, its characterized in that between the adjacent stabilizer blade 131: the bottom periphery of the cover body 1 or the periphery near the bottom is provided with an extension part 3 extending downwards corresponding to each secondary air inlet channel 15, the extension part 3 is provided with a secondary air inlet 310 for secondary air to flow in, the top periphery of the heat insulation cover or the periphery near the top is provided with an upper extension part 3, thereby the secondary air channel formed by the external secondary air passing through the extension part 3 is narrowed, the channel sectional area is obviously reduced, and the following advantages are achieved: 1. the air inlet resistance is increased, the supplement amount of secondary air is reduced, and the reduction of excess air is beneficial to reducing the heat taken away by a large amount of smoke; 2. the space is reduced, the secondary air flow rate is increased, the flow rate is increased, heat exchange is facilitated, a better secondary air preheating effect is achieved, and the heat efficiency can be improved by preheating the secondary air; 3. can reduce the influence of the smoke suction effect of the range hood.

Specifically, in order to enable the secondary air to flow in more uniformly, the extension portion 3 of the present embodiment is ribs 31 provided at intervals, and the intervals between adjacent ribs 31 constitute the secondary air inlet 310. In order to guide the secondary air and avoid the secondary air from being influenced by the smoke sucking action of the range hood, each rib 31 is in a side-arranged V-shaped structure and comprises a first supporting leg 311, a second supporting leg 312 and a joint end of the two supporting legs 131, namely a middle tip part 313 in the shape of a V, wherein the first supporting leg 311 extends outwards from the middle tip part in an inclined manner, and the second supporting leg 312 extends inwards from the middle tip part in an inclined manner. The first support leg 311 and the second support leg 312 extend inwards and outwards from the middle tip part in an oblique direction respectively, guide secondary air in different directions, and form a closed area in a certain area due to the V-shaped side arrangement of the first support leg and the second support leg, so that the guided secondary air can be prevented from being influenced by suction of the range hood. And, a distance L1 between the outermost end of the first leg 311 and the middle tip portion is greater than a distance L2 between the innermost end of the second leg 312 and the middle tip portion to reinforce the first leg 311 to prevent the introduced secondary air from being affected by the suction of the range hood. In addition, in order to increase the heat insulation effect of the cover body 1, the cover body 1 is of a double-layer structure consisting of an upper layer cover 11 and a lower layer cover 12, a cavity 13 is formed between the upper layer cover 11 and the lower layer cover 12, and the lower layer cover 12 is provided with a concave-convex structure at least at three positions corresponding to the bottom wall of the cavity 13 to form support legs 131 distributed along the circumferential direction. Meanwhile, in order to prevent the fire hole from being blocked by the overflowing liquid generated during the cooking process, the upper cover 11 has a protrusion structure 110 protruding upward at the center, and the protrusion structure 110 forms a liquid storage region 111 together with the outer circumferential wall. Finally, the inner and outer edges of the upper shell 11 and/or the lower shell 12 are provided with annular slits 4 communicating with the outside and with the cavity 13. This heat exchanger for kitchen use is open cavity 13, can make the air in the cavity 13 take place the flow of small range, can reduce upper cover 11 heat conduction to lower floor's 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 quiescent air layer thickness to separate heat in order to satisfy annular gap 4, can also reduce the area of contact between the two layers simultaneously, reduce the contact heat transfer loss, can guarantee the small range flow of air between the two-layer again, preheat the air that gets into through annular gap 4, this embodiment only is provided with annular gap 4 in the outward flange of upper cover 11 and lower floor's cover 12.

Example 2

The structure is basically the same as that of the embodiment 1, and the only difference is that: the extension portion 3 has a plate shape, and each secondary-air inflow port 31 is provided obliquely with respect to the extension portion 3, as shown in fig. 4 and 5.

Claims

1. The utility model provides a range is with separating heat exchanger, is including the cover body (1), the bottom of the cover body (1) has along circumferentially distributed's stabilizer blade (131), forms secondary air inlet channel (15), its characterized in that between adjacent stabilizer blade (131): the bottom periphery of the cover body (1) or the periphery close to the bottom of the cover body is provided with extension parts (3) extending downwards corresponding to the secondary air inlet channels (15), and secondary air inlets (310) for secondary air to flow in are formed in the extension parts (3).

2. The heat shield for a cooktop according to claim 1, wherein: the extending parts (3) are convex ribs (31) arranged at intervals, and the intervals between the adjacent convex ribs (31) form the secondary air inlet (310).

3. The cooktop heat shield of claim 2, wherein: each convex rib (31) is of a laterally arranged V-shaped structure and comprises a first supporting leg (311), a second supporting leg (312) and a middle tip part (313) of the V shape, wherein the joint end of the two supporting legs (131) is located at the middle tip part of the V shape, the first supporting leg (311) extends outwards from the middle tip part in an inclined mode, and the second supporting leg (312) extends inwards from the middle tip part in an inclined mode.

4. The cooktop heat shield of claim 3, wherein: the distance L1 between the outermost end of the first leg (311) and the middle tip portion is greater than the distance L2 between the innermost end of the second leg (312) and the middle tip portion.

5. The heat shield for a cooktop according to any one of claims 1 to 4, wherein: the cover body (1) is of a double-layer structure formed by an upper-layer cover (11) and a lower-layer cover (12), a cavity (13) is formed between the upper-layer cover (11) and the lower-layer cover (12), and at least three positions of the lower-layer cover (12) corresponding to the bottom wall of the cavity (13) are provided with concave-convex structures to form support legs (131) distributed along the circumferential direction.

6. The cooktop heat shield of claim 5, wherein: the center of the upper layer cover (11) is provided with a convex structure (110) which protrudes upwards, and the convex structure (110) and the outer side peripheral wall form a liquid storage area (111) together.

7. The cooktop heat shield of claim 6, wherein: the inner edge and the outer edge of the upper layer cover (11) and/or the lower layer cover (12) are provided with annular slits (4) communicated with the outside and the cavity (13).