CN114198793B

CN114198793B - Heat-insulating energy-gathering ring and combustor comprising same

Info

Publication number: CN114198793B
Application number: CN202010980514.3A
Authority: CN
Inventors: 朱志新; 茅忠群; 诸永定
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2023-02-07
Anticipated expiration: 2040-09-17
Also published as: CN114198793A

Abstract

The invention discloses a heat-insulation energy-gathering ring and a burner comprising the same. According to the invention, the heat insulation layer with the plurality of open grooves is arranged below the surface layer of the energy gathering ring, so that air below the surface layer is limited in each discretely-separated open groove, convection flow of air below the surface layer due to uneven heating is avoided, the flow rate of air below the surface layer is reduced, and heat loss can be reduced. And the clearance that forms between insulating layer and the surface course can reduce the surface course to the heat transfer of insulating layer, reduces the heat energy loss of surface course, helps the promotion of combustion heat efficiency.

Description

Heat-insulating energy-gathering ring and combustor comprising same

Technical Field

The invention relates to the field of cookers, in particular to a heat-insulating energy-gathering ring and a combustor comprising the same.

Background

At present, the highest-performance cooking utensils in the market have the heat load of 4.5kW and the heat efficiency of 75%, and with the increasing market competition of kitchen electric products, all enterprises develop cooking utensils with larger firepower, higher heat efficiency and easy cleaning. In the actual use process of the existing gas stove, because a pot is placed on pot support soil for heating, and a certain space interval is formed between the pot and a burner, a considerable part of heat energy generated by gas combustion escapes to the surrounding environment except for heating the pot, so that energy waste is caused.

Most of the existing combustors are provided with energy collecting rings to improve the heat energy utilization rate so as to improve the heat efficiency. The existing energy-gathering ring is generally of a single-layer or double-layer structure, because the energy-gathering ring is made of metal, the heat conductivity is good, and a lot of heat of the energy-gathering ring of the single-layer structure is conducted out by the energy-gathering ring, so that the utilization rate of the heat energy of a combustor is not high. And bilayer structure's energy-gathering circle can utilize the air chamber between the two-layer to come the separation partly heat-conduction, but bilayer structure's first layer directly faces flame high temperature gas, the temperature is the highest, because the inhomogeneity of high temperature gas flow and flame heating, make first layer metal surface be heated inhomogeneously, lead to everywhere air temperature uneven distribution in the air chamber, form the micro-convection of air, and the air convection heat transfer ability in the flow is far greater than the heat-conducting capacity of static air, so have partly heat and transfer to bilayer structure's second floor downwards, make the second floor also have higher temperature, the heat loss is great, heat utilization rate is also not very high.

Disclosure of Invention

The invention aims to overcome the defect of low heat energy utilization rate of a combustor in the prior art, and provides a heat-insulating energy-gathering ring and a combustor comprising the same.

The invention solves the technical problems through the following technical scheme:

the utility model provides a thermal-insulated energy of gathering encloses, thermal-insulated energy of gathering includes the surface course and locates the insulating layer of surface course below, the insulating layer with form the clearance between the surface course, the upper surface of insulating layer has a plurality of openings orientation the open slot of surface course.

In this scheme, through gathering the below setting of the surface course that encloses and have the insulating layer of a plurality of open slots, with the air restriction of surface course below in each discrete open slot that separates, avoided the air of surface course below to flow because of being heated inhomogeneous production convection current, reduce the flow rate of the air of surface course below to can reduce the heat waste. And the clearance that forms between insulating layer and the surface course can reduce the surface course to the heat transfer of insulating layer, reduces the heat energy loss of surface course, helps the promotion of combustion heat efficiency.

Preferably, the heat insulation layer comprises a main layer plate and a plurality of annular plates, the annular plates are arranged on one surface of the main layer plate facing the surface layer, and the open grooves are formed between the adjacent annular plates.

In the scheme, the adjacent annular plates form the open slots, so that the annular plates on two sides of the open slots transfer heat to the adjacent open slots, the whole heat insulation layer reaches a homothermal state, and the convection of air is avoided.

Preferably, the heat insulation layer comprises a main layer plate, a plurality of annular plates and a plurality of strip-shaped plates, the annular plates and the strip-shaped plates are arranged on one surface of the main layer plate facing the surface layer, and the open grooves are formed between the adjacent annular plates and the strip-shaped plates.

In this scheme, form the open slot through adjacent annular slab and bar shaped plate for the annular slab and the bar shaped plate of open slot both sides are to adjacent open slot heat transfer, make whole insulating layer reach a state with the temperature, avoid the air to produce the convection current.

Preferably, the distance between the upper end surface of the strip-shaped plate and the surface layer is smaller than the distance between the upper end surface of the annular plate and the surface layer.

In this scheme, the connection form of bar and annular plate is that each annular plate becomes a whole with bar fixed connection, leaves little clearance with the surface course in order to avoid the metal direct contact a large amount of heat to the transmission of below, reduces the heat waste.

Preferably, the surface layer comprises a first layer plate and a second layer plate, the first layer plate is arranged above the second layer plate, and a cavity is formed between the first layer plate and the second layer plate.

In this scheme, because the surface course is direct towards flame high temperature gas, the temperature is the highest, and the flow of high temperature gas and the inhomogeneity of flame heating make the metal surface of surface course inhomogeneous being heated, lead to the air temperature who leads to everywhere of surface course below uneven distribution, form the air convection, and the air convection heat transfer ability in the flow is far greater than the heat conductivility of quiescent air, can lead to partly heat to the loss all around, and the heat waste is great. Through setting the surface course to hollow structure's bilayer structure, can reduce the heat energy of surface course top towards the air transfer of surface course below through the air in the cavity on the one hand, and then reduce the heat energy loss of surface course top, on the other hand passes through the cavity buffering and balance for the temperature difference everywhere in surface course bottom is less, and then makes the air of surface course below can be heated evenly, avoids appearing the air convection phenomenon because of the different productions of air temperature.

Preferably, the outer edge of the second ply is located inwardly of the outer edge of the first ply, the outer edge of the second ply not enclosing the cavity.

In this scheme, avoid the air that is heated in the cavity towards the outside loss that gathers the circle, make the air that is heated flow towards the insulating layer direction, can preheat the air of insulating layer below, realize thermal recycle.

Preferably, the heat-insulating energy-gathering ring further comprises heat exchange fins, a plurality of heat exchange fins are arranged on the lower end face of the heat-insulating layer, heat exchange channels are formed between every two heat exchange fins, and the heat exchange channels extend along the radial direction of the heat-insulating layer.

In this scheme, heat transfer fin preheats the secondary air that gets into the fire lid from gathering the circle downside, carries out recycle to the heat of insulating layer loss, reduces the heat dissipation of whole combustion system to the surrounding environment, helps the promotion of combustion heat efficiency.

Preferably, the heat-insulating energy-gathering ring further comprises a bottom layer, an accommodating cavity is formed between the bottom layer and the surface layer, the heat-insulating layer is arranged in the accommodating cavity, an air inlet for outside air to enter is formed in the outer end portion of the accommodating cavity, and an air outlet facing the fire cover is formed in the inner end portion of the accommodating cavity.

In this scheme, through set up the bottom in the below of insulating layer, avoid near insulating layer air to receive external environment's influence, also help reducing whole combustion system to the heat dissipation of surrounding environment.

Preferably, the upper end of the bottom layer is connected with the surface layer, and the lower end of the bottom layer is used for being connected with a liquid containing disc on a burner panel;

the air inlet includes first air inlet and second air inlet, first air inlet be located the bottom with the junction of surface course, the second air inlet be located the bottom with the junction of flourishing liquid dish.

In this scheme, all set up the air inlet at the upper and lower both ends of bottom, be favorable to the external secondary air that supplies fire lid burning to use of carrying to holding the intracavity.

A burner comprising an insulated concentrator ring as described above.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: according to the invention, the heat insulation layer with the plurality of open grooves is arranged below the surface layer of the energy gathering ring, so that air below the surface layer is limited in each discretely-separated open groove, convection flow of air below the surface layer due to uneven heating is avoided, the flow rate of air below the surface layer is reduced, and heat loss can be reduced. And the clearance that forms between insulating layer and the surface course can reduce the surface course to the heat transfer of insulating layer, reduces the heat energy loss of surface course, helps the promotion of combustion heat efficiency.

Drawings

FIG. 1 is a schematic structural view of an insulating and energy concentrating ring according to a preferred embodiment of the present invention.

FIG. 2 is an exploded view of a heat insulating and energy concentrating ring according to a preferred embodiment of the present invention.

FIG. 3 is a schematic view of the internal structure of the heat-insulating energy concentrating ring in the preferred embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a heat insulation layer in a preferred embodiment of the invention.

FIG. 5 is a top view of an insulation layer in a preferred embodiment of the invention.

Fig. 6 is a bottom view of a thermal barrier layer in a preferred embodiment of the invention.

FIG. 7 is a schematic structural view of a burner in a preferred embodiment of the present invention.

Description of reference numerals:

face layer 100

First laminate 101

Second laminate 102

Cavity 103

Thermal insulation layer 200

Main layer board 201

Open slot 210

Annular plate 211

Strip 212

Heat exchange fin 220

Heat exchange channel 221

Bottom layer 300

First air inlet 301

Second air intake 302

Gas outlet 303

Liquid containing tray 400

Fire lid 500

Detailed Description

The invention will be more clearly and completely illustrated by way of example in the accompanying drawings, without thereby limiting the scope of the invention to this embodiment.

As shown in fig. 1-3, the heat insulation and energy concentrating ring of the present embodiment includes a surface layer 100 and a heat insulation layer 200 disposed below the surface layer 100, a gap (not shown) is formed between the heat insulation layer 200 and the surface layer 100, and the upper surface of the heat insulation layer 200 has a plurality of open grooves 210 opening toward the surface layer 100.

The heat insulation layer 200 with the plurality of open grooves 210 is arranged below the surface layer 100 of the energy gathering ring, so that air below the surface layer 100 is limited in each discretely-separated open groove 210, the phenomenon that the air below the surface layer 100 flows in a convection mode due to uneven heating is avoided, the flowing speed of the air below the surface layer 100 is reduced, and heat loss can be reduced. Moreover, the gap formed between the heat insulating layer 200 and the surface layer 100 can reduce heat transfer from the surface layer 100 to the heat insulating layer 200, reduce heat loss of the surface layer 100, and contribute to improvement of combustion heat efficiency.

The heat insulation layer 200 comprises a main layer plate 201, a plurality of annular plates 211 and a plurality of strip-shaped plates 212, wherein the annular plates 211 and the strip-shaped plates 212 are arranged on one surface of the main layer plate 201 facing the surface layer 100, and an open groove 210 is formed between the adjacent annular plates 211 and the strip-shaped plates 212. The adjacent annular plates 211 and the strip-shaped plates 212 form the open grooves 210, so that the annular plates 211 and the strip-shaped plates 212 on the two sides of the open grooves 210 transfer heat to the adjacent open grooves 210, the whole heat insulation layer 200 reaches a homothermal state, and convection of air is avoided.

As shown in fig. 4 to 5, in the present embodiment, the plurality of annular plates 211 are annular plates 211 with different sizes, the large annular plate 211 is sleeved outside the small annular plate 211 to form an annular groove with a coaxial structure, and the plurality of strip-shaped plates 212 are arranged along the radial direction of the annular plate 211 to divide the annular groove into a plurality of open grooves 210 with smaller spaces, so as to more effectively reduce the convection of air. In this embodiment, the annular plate 211 is fixed to the main layer plate 201 by welding, and the strip plate 212 is fixed to the annular plate 211 by welding. In other embodiments, the ring-shaped plate 211 and the strip-shaped plate 212 can be fixed on the main layer 201 by other fixing means.

The strip-shaped plates 212 and the annular plates 211 are connected in a mode that the strip-shaped plates 212 are used for fixedly connecting the annular plates 211 into a whole, and a small gap is reserved between the strip-shaped plates 212 and the surface layer 100 so as to avoid the direct contact of metal and the downward transfer of a large amount of heat and reduce the heat loss.

In the present embodiment, the distance between the upper end surface of the strip-shaped plate 212 and the facing layer 100 is smaller than the distance between the upper end surface of the annular plate 211 and the facing layer 100. The air flow between the open grooves 210 in the same annular groove formed by two adjacent annular plates 211 is facilitated, the air in the same annular groove can be subjected to micro-flow for temperature balance, the air flows in the circumferential direction in the annular groove, the radial flow of the air between the adjacent annular grooves can be reduced, and the temperature of the air in the heat insulation layer 200 can further reach a balance state.

In other embodiments, the heat insulation layer 200 may also be composed of only the main layer plate 201 and a plurality of annular plates 211 with different sizes, the annular plates 211 are disposed on a surface of the main layer plate 201 facing the surface layer 100, the large annular plate 211 is sleeved on an outer side of the small annular plate 211, and an annular groove with a coaxial structure is formed between two adjacent annular plates 211, and the annular groove is an open groove.

In this embodiment, the surface layer 100 is fixedly connected to the heat insulation layer 200 by welding, and a plurality of welding feet protruding to a certain height are provided on the annular plate 211 for welding to the lower surface of the surface layer 100. Make insulating layer 200 whole part and surface course 100 bottom not direct contact through the welding foot, leave the clearance, only be connected with surface course 100 through the welding foot, guarantee that the contact surface is as little as possible, reduce the contact heat conduction. For example, four welding feet protruding 1mm in height are provided at the top ends of the innermost annular plate 211 and the outermost annular plate 211, and the four welding feet protruding 1mm form a 1mm gap between the thermal insulation layer 200 and the surface layer 100.

As shown in fig. 4 and 6, the heat-insulating energy-gathering ring further comprises heat exchange fins 220, a plurality of heat exchange fins 220 are fixed on the lower surface of the main layer plate 201, heat exchange channels 221 are formed between every two heat exchange fins 220, and the heat exchange channels 221 extend along the radial direction of the main layer plate 201. The secondary air entering the fire cover from the lower side of the energy gathering ring is preheated through the heat exchange channel 221 formed by the heat exchange fins 220, partial heat lost by the heat insulation layer 200 is recycled, heat dissipation of the whole combustion system to the surrounding environment is reduced, and the combustion heat efficiency is improved.

As shown in fig. 2 and 3, in the present embodiment, the facing 100 includes a first laminate 101 and a second laminate 102, the first laminate 101 is disposed over the second laminate 102, and a cavity 103 is formed between the first laminate 101 and the second laminate 102.

Because the surface course 100 directly faces flame high temperature gas, the temperature is the highest, and the flow of high temperature gas and the inhomogeneity of flame heating make the metal surface of surface course 100 be heated inhomogeneous, lead to the air temperature uneven distribution everywhere of surface course 100 below, form the air convection, and the air convection heat transfer ability in the flow is far greater than the heat-conducting capacity of static air, can make partly heat to the loss all around, lead to heat energy loss great. Through setting surface course 100 to hollow structure's bilayer structure, can reduce the heat energy of the air transmission of surface course 100 top towards surface course 100 below through the air in the cavity 103 on the one hand, and then reduce the heat energy loss of surface course 100 top, on the other hand cushions and balances through cavity 103, makes surface course 100 bottom everywhere difference in temperature less, and then makes the air of surface course 100 below can be heated evenly, avoids appearing because of the air convection phenomenon of the different productions of air temperature.

As shown in FIG. 3, the outer edge of the second ply 102 is located inboard of the outer edge of the first ply 101, and the outer edge of the second ply 102 does not enclose the cavity 103. Through the structure, heated air in the cavity 103 is prevented from escaping towards the outer side of the energy collecting ring, the heated air flows towards the direction of the heat insulation layer 200, the air below the heat insulation layer 200 can be preheated, and heat recycling is realized.

In other embodiments, the surface layer 100 may have only one layer structure, or two or more layers, and is not limited herein.

As shown in fig. 1-3, the heat-insulating energy-gathering ring further comprises a bottom layer 300, a containing cavity is formed between the bottom layer 300 and the surface layer 100, the heat-insulating layer 200 is arranged in the containing cavity, an air inlet for outside air to enter is arranged at the outer end of the containing cavity, and an air outlet 303 facing the fire cover is arranged at the inner end of the containing cavity. By providing bottom layer 300 below insulation layer 200, air near insulation layer 200 is protected from the external environment, which also helps to reduce heat dissipation from the entire combustion system to the surrounding environment.

The lower end of the bottom layer 300 is fixed with the liquid containing tray 400 on the burner panel, and the upper end of the bottom layer 300 is connected with the surface layer 100. The air inlets comprise a first air inlet 301 and a second air inlet 302, the first air inlet 301 is positioned at the joint of the bottom layer 300 and the surface layer 100, and the second air inlet 302 is positioned at the joint of the bottom layer 300 and the liquid containing tray 400. All set up the air inlet at the upper and lower both ends of bottom 300, be favorable to the external secondary air that supplies the fire lid burning to holding the intracavity transport and use.

In this embodiment, the bottom layer 300 has a plurality of protruding support legs at the lower end and the upper end thereof, the support legs at the lower end of the bottom layer 300 are welded and fixed to the liquid containing tray 400, and the second air inlet 302 is formed between the support legs. The supporting legs of bottom 300 upper end is used for supporting surface course 100, and surface course 100 can be dismantled the overlap joint and on the supporting legs, easy to assemble and cleanness. A first air inlet 301 is formed between the support legs at the upper end of the bottom layer 300. The bottom layer 300 is contacted with the liquid containing plate 400 and the surface layer 100 through the supporting legs, so that the contact surface is ensured to be as small as possible, and the heat conduction is reduced.

A gap is formed between the lower end of the heat exchange fin 220 and the liquid containing disc 400, so that the heat exchange fin 220 is prevented from contacting with the liquid containing disc 400, and the heat energy of the heat insulation layer 200 is transmitted to the liquid containing disc 400 through the heat exchange fin 220 to cause heat energy loss.

The embodiment also discloses a combustor, which comprises the heat-insulating energy-gathering ring. As shown in fig. 7, the heat insulating and energy concentrating ring is installed on the liquid containing plate 400, and the fire cover 500 is located at the middle position of the heat insulating and energy concentrating ring.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. The heat insulation and energy accumulation ring is characterized by comprising a surface layer and a heat insulation layer arranged below the surface layer, wherein a gap is formed between the heat insulation layer and the surface layer, and the upper surface of the heat insulation layer is provided with a plurality of open grooves with openings facing the surface layer;

the heat insulation layer comprises a main layer plate, a plurality of annular plates and a plurality of strip-shaped plates, the annular plates and the strip-shaped plates are arranged on one surface of the main layer plate facing the surface layer, and the open slot is formed between the adjacent annular plates and the strip-shaped plates;

the heat-insulating energy-gathering ring further comprises a bottom layer, a holding cavity is formed between the bottom layer and the surface layer, the heat-insulating layer is arranged in the holding cavity, an air inlet for external air to enter is formed in the outer end portion of the holding cavity, and an air outlet facing the fire cover is formed in the inner end portion of the holding cavity.

2. The insulated power ring of claim 1, wherein the distance between the upper face of the strip and the facing is less than the distance between the upper face of the annular plate and the facing.

3. The insulated energy concentrating ring of claim 1, wherein the facing comprises a first layer and a second layer, the first layer being disposed over the second layer, the first layer and the second layer defining a cavity therebetween.

4. The insulated concentrator ring of claim 3, wherein an outer edge of the second deck is located inward of an outer edge of the first deck, the outer edge of the second deck not enclosing the cavity.

5. The heat insulation and energy gathering ring as claimed in claim 1, wherein the heat insulation and energy gathering ring further comprises heat exchange fins, a plurality of heat exchange fins are arranged on the lower end face of the heat insulation layer, a heat exchange channel is formed between every two heat exchange fins, and the heat exchange channel extends along the radial direction of the heat insulation layer.

6. The heat insulating and energy concentrating ring of claim 1, wherein the upper end of the bottom layer is connected with the surface layer, and the lower end of the bottom layer is used for being connected with a liquid containing disc on a burner panel;

7. A burner comprising an insulated concentrator ring according to any one of claims 1 to 6.