CN202813469U - Efficient gas cooker with reheating function - Google Patents
Efficient gas cooker with reheating function Download PDFInfo
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- CN202813469U CN202813469U CN2012204344141U CN201220434414U CN202813469U CN 202813469 U CN202813469 U CN 202813469U CN 2012204344141 U CN2012204344141 U CN 2012204344141U CN 201220434414 U CN201220434414 U CN 201220434414U CN 202813469 U CN202813469 U CN 202813469U
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- 238000003303 reheating Methods 0.000 title abstract 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 172
- 239000003546 flue gas Substances 0.000 claims abstract description 172
- 238000010411 cooking Methods 0.000 claims abstract description 170
- 230000005855 radiation Effects 0.000 claims abstract description 137
- 239000007789 gas Substances 0.000 claims abstract description 70
- 238000002485 combustion reaction Methods 0.000 claims abstract description 50
- 239000012530 fluid Substances 0.000 claims description 142
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 112
- 238000012546 transfer Methods 0.000 claims description 67
- 239000000523 sample Substances 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 20
- 239000008399 tap water Substances 0.000 claims description 12
- 235000020679 tap water Nutrition 0.000 claims description 12
- 235000013305 food Nutrition 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims 1
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- 238000001816 cooling Methods 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 239000003570 air Substances 0.000 description 76
- 239000000779 smoke Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000002918 waste heat Substances 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000021403 cultural food Nutrition 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
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- 239000000571 coke Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 firewood Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
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- 239000003345 natural gas Substances 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The utility model relates to an efficient gas cooker with a reheating function, which comprises a combustion area, an exterior protected heat exchange area and a pot placing area, wherein the pot placing area is used for placing cooking pots, the exterior protected heat exchange area is located on the outer side of the combustion area, and the pot placing area is arranged above the combustion area and the exterior protected heat exchange area. The exterior protected heat exchange area comprises a radiation cross-flow heat exchanger, a double-fluid-channel heat exchanger and a high-level flue gas outlet which jointly guide high-temperature flue gas of a cooking range to flow close to the bottom of a cooking pot so as to form a forced flow channel of the high-temperature flue gas, thereby promoting the heat exchange between the low-temperature flue gas and the bottom of the cooking pot; and medium-temperature flue gas subjected to heat exchange and cooling through the bottom of the cooking pot carries out heat exchange with low-temperature combustion air supplemented to the inside of the cooking range so as to form a flue gas reheating mechanism, thereby reducing the high-temperature radiation of high-temperature flue gas to the environment and the spreading of flue gas in the environment, raising the temperature of the combustion air, improving the temperature of the high-temperature flue gas of the cooking range, and solving the technical problem that the existing gas cooker is low in thermal efficiency, and serious in environmental pollution.
Description
Technical Field
The utility model relates to a kitchen equipment, in particular to take high-efficient gas cooking utensils of backheat function.
Background
The progress of artificial fire-fighting is that human beings use natural force for the first time consciously and successfully, and the living state and development conditions of the human beings are fundamentally improved. Enges said that "in terms of world release, the progress of manual fire extraction has surpassed steam engines". The progress of manual fire taking and the rise of cooking activities taking fire as a heat source create wonderful food culture and 'Chinese on the tongue tip' of human beings.
The food culture is more and more complicated and more wonderful, but for thousands of years, the cooking stove from the tripod of Han and Tang to the gas stove of today has no subversive change in basic function and main structure: fuel such as firewood, coke and gas sprayed by the metal burner are placed below the stove, and after the fuel is ignited, the flame consisting of high-temperature flue gas moves upwards under the action of the air flotation force of the high-temperature flue gas, and heats the bottom of the pot through convection and radiation, so that food in the pot is fried, exploded and stewed.
The basic unchanged stove structure for thousands of years enables the thermal efficiency to wander near 50% for a long time, so that a large amount of heat energy is lost and wasted.
According to the data of the national statistical bureau, the average energy consumed by each person in daily life (without heating) of urban and rural residents in China is converted into standard coal, and the energy consumption is increased from 123.7 kg in 2000 to 254.2 kg in 2009. Wherein the average daily consumption of natural gas is 2.6m of 2000 years3Increased to 13.3m in 20093The year increases by 20%, showing a rapidly increasing momentum.
In the rapid increase of energy consumption of urban and rural residents per person per year in China, cooking energy accounts for a large proportion. In 2008, total living energy consumption of residents except for heating energy of urban and rural residents in China is 30723.7 ten thousand tons of standard coal, wherein the total fuel gas consumption of cooking activities is reduced to 4127 ten thousand tons of standard coal, which accounts for 13.4% of the total civil energy consumption, the national reform committee published in 2004 "medium and long term energy conservation planning", and the average thermal efficiency of national gas cookers reaches 60% -65% by 2010. However, the detection results of the national gas appliance quality inspection monitoring center show that the thermal efficiency of the table gas stove is generally below 50%, and the proportion of the gas stove with the thermal efficiency exceeding 60% is not more than 1%.
The heat efficiency of gas cookers in China is below 50% for a long time, which causes 3 serious problems:
firstly, a large amount of heat energy is wasted. The heat energy wasted by hundreds of millions of gas cooking utensils in cities and countryside of China every year reaches more than ten million tons of standard coal.
Secondly, serious thermal pollution is caused. The heat energy which is not effectively utilized after the gas is combusted is mostly released in a narrow kitchen space in the form of heat radiation and heat convection, so that serious heat pollution is caused.
And thirdly, serious air environment pollution is caused. High-temperature smoke formed by combustion of gas is directly discharged into the air of a kitchen, and although the range hood is used for pumping, a large amount of harmful smoke such as carbon dioxide, sulfur dioxide and the like is still dispersed in the air of the kitchen, so that the health of family members, particularly palm personnel, is damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a take high-efficient gas cooking utensils of backheating function to solve the low and serious technical problem of indoor flue gas pollution of thermal efficiency of current gas cooking utensils.
In order to solve the problem, the utility model provides a take high-efficient gas cooking utensils of backheating function, including combustion area, enclosure heat transfer district and be used for placing the pot district of putting of cooking pan, enclosure heat transfer position in the outside of combustion area, it sets up to put the pot district the combustion area with enclosure heat transfer district top:
a cooking range is arranged in the combustion area, and the cooking range can generate high-temperature flue gas;
the enclosure heat exchange area comprises a plurality of radiation cross-flow heat exchangers, a high-level flue gas outlet and a plurality of double-fluid channel heat exchangers, and the radiation cross-flow heat exchangers are positioned on the inner side of the enclosure heat exchange area; the high-level flue gas outlet is communicated with the combustion area, the high-level flue gas outlet is arranged at a high level and is positioned above the plurality of radiation cross-flow heat exchangers, and the high-level flue gas outlet guides the high-temperature flue gas to be close to the bottom of the cooking pot so as to promote the high-temperature flue gas and the bottom of the cooking pot to form a forced flow channel of the high-temperature flue gas;
the double-fluid channel heat exchanger is matched and connected with the radiation cross-flow heat exchanger, the double-fluid channel heat exchangers are positioned outside the enclosure heat exchange area, the double-fluid channel heat exchanger is higher than the radiation cross-flow heat exchanger, and the upper edges of the double-fluid channel heat exchangers are matched with the bottom of the cooking pot; a first connecting channel and a second connecting channel are arranged between the radiation cross-flow heat exchanger and the two-fluid-channel heat exchanger, the two-fluid-channel heat exchanger comprises a cold fluid channel and a hot fluid channel, the cold fluid channel is connected with a heated medium and is communicated with the first connecting channel, and the first connecting channel is communicated with the radiation cross-flow heat exchanger; the second connecting channel is communicated with medium-temperature flue gas which is formed by heat exchange and temperature reduction of high-temperature flue gas passing through the high-position flue gas outlet and the bottom of the cooking pan, the second connecting channel is communicated with the hot fluid channel, and the air outlet of the hot fluid channel is communicated to the outside atmosphere;
the high-temperature flue gas passing through the high-position flue gas outlet exchanges heat with the bottom of the cooking pan and is cooled to form medium-temperature flue gas, and the medium-temperature flue gas flows into the second connecting channel from the inlet of the second connecting channel to the hot fluid channel; and the heated medium after heat exchange flows into the first connecting channel from the outlet of the cold fluid channel to the radiation cross-flow heat exchanger and flows out from the outlet of the radiation cross-flow heat exchanger.
According to the utility model discloses a high-efficient gas cooking utensils of area backheating function, the air outlet and a centrifugal fan of hot-fluid channel are connected.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, centrifugal fan's exit still sets up a first probe of measuring flue gas tail gas temperature, first probe is connected with the control unit of cooking utensils with control centrifugal fan's rotational speed.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, still set up a second probe that is used for testing kitchen range flame temperature on the metal sheet of the inboard of radiation cross-flow heat exchanger, this second probe is corresponding to kitchen range top to be connected with the control unit of cooking utensils with control centrifugal fan's rotational speed.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, each radiation cross-flow heat exchanger is the circular arc type, and each radiation cross-flow heat exchanger is independent individuality, and the radiation cross-flow heat exchanger zonulae occludens of a plurality of circular arc types becomes a circle, and is corresponding, and each two fluid passage heat exchanger is the circular arc type, and each two fluid passage heat exchanger is independent individuality, and a plurality of two fluid passage heat exchangers zonulae occludens become a circle.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, it is cold combustion air to be heated the medium, cold combustion air follows the import of the cold fluid channel of two fluid channel heat exchangers gets into, cold air inlet sets up the below of cooking utensils, the export intercommunication of radiation cross-flow heat exchanger extremely the combustion area, for the kitchen range provides the combustion air after the intensification.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, be cold water by heating medium, cooking utensils still include a water tank, the water tank pass through outlet conduit with the access connection of the cold fluid channel of two fluid channel heat exchangers, the water tank pass through the inlet tube with the exit linkage of radiation cross-flow heat exchanger, still connect a circulating water pump on the inlet tube.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, centrifugal fan's sunction inlet department still connects a pipe fin heat exchanger, water pipe one end in the pipe fin heat exchanger is connected with the running water, and the other end is connected with the water tank.
According to the utility model discloses a take high-efficient gas cooking utensils of backheating function, radiation cross-flow heat exchanger includes the inner chamber of being rolled over by the metal sheet, set up a plurality of first fins on radiation cross-flow heat exchanger's the metal sheet, a plurality of first fins will the inner chamber falls into a plurality of fluid passage.
According to the utility model discloses a high-efficient gas cooking utensils of area backheating function, a plurality of first fins are on a parallel with radiation cross-flow heat exchanger's bottom, the front end of a plurality of first fins is the import cavity, the import cavity with radiation cross-flow heat exchanger's access connection, the rear end of a plurality of first fins is the export cavity, the export cavity with radiation cross-flow heat exchanger's exit linkage.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function, the reason of going up of two fluid passage heat exchangers closely cooperates with the bottom of cooking pan, forms the high temperature flue gas to atmospheric closure around the cooking utensils.
According to the utility model discloses preferred embodiment take high-efficient gas cooking utensils of backheating function put and set up one in the pot district and prevent food in the cooking pan falls into envelope heat transfer district's cooking pot support ring, the bottom of cooking pan closely cooperates on this cooking pot support ring, the cooking pot support ring is cyclic annular, the outward flange setting of cooking pot support ring is in on the outer enclosure, the inward flange setting of cooking pot support ring is in inlayer enclosure's top.
According to the utility model discloses a preferred embodiment take high-efficient gas cooking utensils of backheating function put the pot district and set up a middle heat transfer plate, the upper surface of middle heat transfer plate with the outline phase-match of cooking pan, outer containment device's last reason with the marginal sealing connection of middle heat transfer plate forms the high temperature flue gas to atmospheric seal around the cooking utensils.
According to the high-efficiency gas cooker with the heat-returning function provided by the preferred embodiment of the present invention, the lower surface of the middle heat transfer plate is provided with a plurality of first fin columns for strengthening the heat exchange of the flue gas.
According to the utility model discloses a high-efficient gas cooking utensils of area backheat function, the bottom of cooking pan sets up a plurality of second wing posts.
Compared with the prior art, the utility model discloses there are following technological effect:
1. mandatory organization of high temperature flue gas.
The high-efficiency gas range with heat-returning device is equipped with forced flue gas channel, and the high-temp flue gas which is originally mixed-combusted with air at the range head and diffused into the air around the range and cooker can be organized, and flowed in the defined channel, and does not mix with low-temp air, so that it can retain the quality of heat energy in the flue gas, and can retain that the flue gas has higher heat-transferring temp. difference and heat-transferring power for heated articles of cooking and cooker, etc..
The physical fields of temperature, humidity, concentration, pressure difference and the like are homogenized in space if the physical fields are subjected to unorganized diffusion, namely entropy increase and chaos trend are the most unfortunate things, and the quality of energy is sacrificed. The materials are organized to prevent diffusion and be utilized orderly, so that the significance of energy conservation and emission reduction is achieved.
2. The middle heat transfer plate or the cooking pot fume side is added with a finned column to strengthen the heat transfer of the high temperature fume to the middle heat transfer plate and the cooking pot
The middle heat transfer plate is arranged between the cooking pot and the stove, the gas burning of the stove firstly heats the middle heat transfer plate, and then the middle heat transfer plate conducts and radiates heat to the cooking pot. At middle heat transfer plate bottom or cooking pan bottom add the fin post, mainly be in order to enlarge the area that high temperature flue gas and middle heat transfer plate or cooking pan carried out the heat exchange, for example, the heat transfer area of 0.1 square meter in the middle heat transfer plate bottom or cooking pan bottom originally enlarges to 0.2 square meter, and insert through these fin posts, increase the disturbance to the high temperature flue gas flow, improve the convection heat transfer coefficient between high temperature flue gas and middle heat transfer plate or the cooking pan, strengthen the flue gas to middle heat transfer plate or cooking pan's heat transfer.
3. The waste heat of the flue gas is recovered and is used for heating the inlet air in front of the cooking range or producing sanitary hot water
After the high-temperature flue gas exchanges heat with a cooking pot (or a fin column at the bottom of an intermediate heat transfer plate), the temperature is over 300 ℃ before the high-temperature flue gas is diffused in ambient air, and the high-temperature flue gas passes through a plate-fin heat exchanger and transfers waste heat to inlet air before a cooking range at the other side through fins so as to improve the temperature of combustion-supporting air before a combustor; the waste heat can be transferred to low-temperature tap water flowing on the side of a cold fluid in the heat exchanger through a plate-fin or tube-fin heat exchanger through fins, and the low-temperature tap water is used for producing sanitary hot water and recovering the waste heat of smoke.
The three points are important, and the combination is more meaningful, so that the integral is greater than the sum of parts, and the heat efficiency of the gas cooker is greatly improved.
Drawings
FIG. 1 is a schematic view of a part of the structure of the present invention for exchanging the residual heat of flue gas to cool air;
fig. 2 is a schematic structural diagram of the radiation cross-flow heat exchanger of the present invention;
FIG. 3 is a schematic diagram of heat exchange for exchanging the residual flue gas to cool air;
FIG. 4 is a schematic structural view of a cooking pot support ring in the efficient finned-column gas cooker with a heat recovery device of the present invention;
fig. 5 is a schematic structural view of a cooking pot placed on a cooking pot support ring in the efficient fin-type gas cooker with a heat recovery device of the present invention;
FIG. 6 is a schematic structural view of a middle heat transfer plate in the high-efficiency finned-column gas cooker with a heat regenerator of the present invention;
fig. 7A is a plan view of the lower surface structure of the intermediate heat transfer plate of the present invention;
fig. 7B is a side view of the lower surface of the intermediate heat transfer plate of the present invention;
FIG. 8A is a plan view of the three-dimensional structure of the cooking pot of the present invention;
FIG. 9B is a schematic view of the bottom structure of the cooking pot of the present invention;
FIG. 9 is a schematic view of a part of the structure of the present invention for exchanging the waste heat of the flue gas to cold water to generate sanitary hot water;
FIG. 10 is a schematic diagram of heat exchange for exchanging the waste heat of flue gas to cold water according to the present invention;
fig. 11 is a structural disassembly schematic diagram of the tube-fin heat exchanger of the present invention.
Detailed Description
The utility model provides a take high-efficient gas cooking utensils of backheating function, including combustion area, enclosure heat transfer district and be used for placing the pot district of putting of cooking pan, enclosure heat transfer position in the outside of combustion area is put the pot district and is set up combustion area and enclosure heat transfer district top. The utility model discloses in, the enclosure heat transfer area is enclosed the combustion area to set up mandatory flue gas passageway, will be original at kitchen range and air-mixed combustion, spread the high temperature flue gas in the air around cooking utensils and pan and organize, flow in the passageway of regulation, not mix with the low temperature air and mix, keep the quality of heat energy in the flue gas, keep the flue gas to have higher heat transfer difference in temperature and heat transfer power to heated article such as cooking pan, improve the heat utilization ratio of high temperature flue gas.
In order to further improve the heat utilization rate of the high-temperature flue gas, the utility model also utilizes the medium-temperature flue gas formed by heat exchange and cooling of the high-temperature flue gas and the bottom of the cooking pot, for example, the medium-temperature flue gas is subjected to heat exchange with the external cold combustion-supporting air through a heat exchanger, and the cold combustion-supporting air is heated and then introduced into the cooking range, so that the temperature, the heat release intensity and the heat utilization rate of the cooking range flue gas are improved; the medium-temperature flue gas can exchange heat with cold water in the water tank through the heat exchanger, sanitary hot water formed by heating the cold water is returned to the water tank for people to use, and the heat utilization rate of the high-temperature flue gas is also greatly improved.
The following examples are given to illustrate the present invention.
Example one
Referring to fig. 1, a high-efficiency gas cooker with a heat recovery function includes a combustion area, a heat exchange area and a pot-placing area for placing a cooking pot 50, in this embodiment, the combustion area and the heat exchange area are connected through an inner cavity partition 12, and the present invention does not limit the material of the inner cavity partition. The outside of enclosing heat transfer zone bit in the combustion area, put the pot district and set up in combustion area and enclosing heat transfer district top, in order to improve the heat utilization ratio of high temperature flue gas, carry out the heat exchange through the medium temperature flue gas that becomes after cooling down with the heat transfer at the bottom of high temperature flue gas and cooking pot and combustion-supporting cold air, lead to the kitchen range 10 with the hot-air that forms behind the cold air heating on, concrete structure is as follows:
a cooking range 10 is arranged in the combustion area, the cooking range 10 is connected with an air inlet pipe 11, fuel gas is provided into the cooking range 10 through the air inlet pipe 11, and the cooking range 10 can generate high-temperature flue gas.
The enclosure heat exchange area comprises an inner enclosure device, an outer enclosure device and a high-level flue gas outlet, wherein the inner enclosure device is arranged on the inner side of the enclosure heat exchange area; the outer layer enclosure device is arranged at the outer side of the enclosure heat exchange area, the outer layer enclosure device is higher than the inner layer enclosure device, and the upper edge of the outer layer enclosure device is matched with the bottom of the cooking pot 50; high-order flue gas air outlet communicates in the combustion area to be located inlayer enclosure's top, high-order flue gas air outlet guide is pressed close to cooking pan 50's bottom by the high temperature flue gas that kitchen range 10 produced, forms the compulsory flow path of high temperature flue gas with the 50 bottom formation high temperature flue gas of cooking pan, carries out the heat exchange with the bottom of cooking pan 50 with the promotion high temperature flue gas. Wherein,
the inner layer enclosing device comprises
Referring to fig. 2, at least one radiation cross-flow heat exchanger 21, the radiation cross-flow heat exchanger 21 is located inside the enclosure heat exchange area, the radiation cross-flow heat exchanger 21 includes an inner cavity formed by folding a metal plate, a plurality of first fins 211 are disposed on the metal plate of the radiation cross-flow heat exchanger 21, and the inner cavity is divided into a plurality of fluid channels by the plurality of first fins 211. In this embodiment, several first fins 211 are parallel to the bottom of the radiation cross-flow heat exchanger 21 and are located on the metal plate inside the radiation cross-flow heat exchanger 21. In this embodiment, the length of the first fin 211 is smaller than the length of the metal plate inside the radiation cross-flow heat exchanger 21, that is, the first fin 211 is not disposed at the front end and the rear end of the metal plate inside the radiation cross-flow heat exchanger 21, the front ends of the first fins 211 are inlet cavities 212, the inlet cavities 212 are connected to an inlet (in this embodiment, the inlet is an air inlet) of the radiation cross-flow heat exchanger 21, the rear ends of the first fins 211 are outlet cavities 213, and the outlet cavities 213 are connected to an outlet (in this embodiment, the outlet is an air outlet) of the radiation cross-flow heat exchanger 21, such a design can reduce the resistance of the combustion air when the combustion air enters the radiation cross-flow heat exchanger 21. The utility model discloses do not do the restriction to the number of radiation cross-flow heat exchanger 21, inlayer enclosure promptly can include a plurality of radiation cross-flow heat exchanger 21, and every radiation cross-flow heat exchanger 21 all is the autonomous working, and every two radiation cross-flow heat exchangers 21 do not have the relevance promptly. In this embodiment, each radiation cross-flow heat exchanger 21 is an arc shape, and a plurality of the arc-shaped radiation cross-flow heat exchangers 21 are tightly connected into a circular shape. In the present invention, the working principle and the structural arrangement of each radiation cross-flow heat exchanger 21 are the same, and therefore, in describing the present embodiment, only one radiation cross-flow heat exchanger 21 will be taken as an example for detailed description. In the present embodiment, the radiation cross-flow heat exchanger 21 includes an air inlet and an air outlet, and the air outlet is connected to the cooking range 10.
In this embodiment, the high-level flue gas outlet is communicated with the combustion area, the high-level flue gas outlet is arranged at a high level and is located above the plurality of radiation cross-flow heat exchangers 21, and the high-level flue gas outlet guides the high-temperature flue gas to be close to the bottom of the cooking pot so as to promote the high-temperature flue gas and the bottom of the cooking pot to form a forced flow channel of the high-temperature flue gas;
the outer enclosure device comprises
At least one dual-fluid channel heat exchanger 20, the dual-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21 are arranged in a matching manner, that is, the number of the dual-fluid channel heat exchangers 20 is equal to that of the radiation cross-flow heat exchangers 21, one dual-fluid channel heat exchanger 20 and one radiation cross-flow heat exchanger 21 are correspondingly and relatively operated, and the height of the dual-fluid channel heat exchanger 20 is greater than that of the radiation cross-flow heat exchanger 21. The utility model discloses do not do the restriction to two fluid passage heat exchangers 20's number, outer enclosure can include a plurality of two fluid passage heat exchangers 20, and every two fluid passage heat exchangers 20 all are the autonomous working, do not have associatively between per two fluid passage heat exchangers 20 promptly. In the present embodiment, each of the two-fluid passage heat exchangers 20 is an arc shape, and a plurality of the arc-shaped two-fluid passage heat exchangers 20 are tightly connected to form a circular shape. In the present invention, the operation principle and the structural arrangement of each two-fluid channel heat exchanger 20 are the same, and therefore, in describing the present embodiment, only one of the two-fluid channel heat exchangers 20 will be taken as an example for detailed description. In the present embodiment, the two-fluid channel heat exchanger 20 may be a plate heat exchanger, but the present invention is not limited thereto, and preferably, the plate heat exchanger is a plate-fin heat exchanger.
In the present embodiment, a first connection channel 222 and a second connection channel 221 are provided between the radiation cross-flow heat exchanger 21 and the two-fluid channel heat exchanger 20; the double-fluid-channel heat exchanger 20 comprises a cold fluid channel 201 and a hot fluid channel 202, the cold fluid channel 201 and the hot fluid channel 202 are isolated by a partition plate 203, an air inlet 2011 of the cold fluid channel is communicated with the outside atmosphere, the cold fluid channel 201 is communicated with a first connecting channel 222, the first connecting channel 222 is communicated with the radiation cross-flow heat exchanger 21, and an air outlet 211 of the radiation cross-flow heat exchanger is communicated to the cooking range 10; the air inlet of the second connecting channel 221 is communicated with the medium temperature flue gas (the high temperature flue gas flowing out from the high position flue gas outlet exchanges heat with the bottom of the cooking pan and then becomes the medium temperature flue gas), the hot fluid channel 202 is connected with the second connecting channel 221, and the air outlet of the hot fluid channel 202 is communicated to the outside atmosphere. In this embodiment, the first connection channel 222 and the second connection channel 221 are connected to the bottom of the radiation cross-flow heat exchanger 21 and the two-fluid channel heat exchanger 20, and the specific structure is as follows:
referring to fig. 3, an air inlet 2011 of the cold fluid channel is communicated with the outside atmosphere, an air outlet of the cold fluid channel 201 is communicated with an air inlet of the first connecting channel 222, an air outlet of the first connecting channel 222 is connected with an air inlet of the radiation cross-flow heat exchanger 21, and an air outlet 211 of the radiation cross-flow heat exchanger is communicated with the cooking range 10; an air inlet of the second connecting channel 221 is communicated with medium-temperature flue gas which is formed by heat exchange and temperature reduction of high-temperature flue gas passing through the high-position flue gas air outlet and the bottom of the cooking pan, an air outlet of the second connecting channel 221 is communicated with an air inlet of the hot fluid channel 202, and an air outlet of the hot fluid channel 202 is communicated to the outside atmosphere; the high-temperature flue gas passing through the high-position flue gas outlet exchanges heat with the bottom of the cooking pan and is cooled to form medium-temperature flue gas, the medium-temperature flue gas flows into the second connecting channel 221 from the gas inlet of the second connecting channel 221, and flows into the hot fluid channel 202 from the gas inlet of the hot fluid channel 202; combustion-supporting cold air flows into the cold fluid channel 201 from the air inlet 2011 of the cold fluid channel, the cold air in the cold fluid channel 201 exchanges heat with the medium-temperature flue gas in the hot fluid channel 202, the medium-temperature flue gas cooled after heat exchange can be discharged out of the stove through a centrifugal fan 30, the heated cold air after heat exchange becomes hot air, flows into the first connecting channel 222 from the air outlet of the cold fluid channel 201, flows into the radiation cross-flow heat exchanger 21 from the air outlet of the first connecting channel 222, and flows out to the stove 10 from the air outlet 211 of the radiation cross-flow heat exchanger. Because the hot air can take away a part of heat on the radiation cross-flow heat exchanger 21 when flowing in the radiation cross-flow heat exchanger 21, and plays a role in cooling the radiation cross-flow heat exchanger 21, in order to increase the heated area of the hot air in the radiation cross-flow heat exchanger 21, a baffle 212 is arranged in the inner cavity of the radiation cross-flow heat exchanger 21, and a gap is left between the upper end of the baffle 212 and the upper end of the inner cavity, which aims to make the hot air flow upward in the radiation cross-flow heat exchanger 21 and increase the heated area of the hot air in the radiation cross-flow heat exchanger 21.
In this embodiment, the centrifugal fan 30 may be a variable-frequency variable-speed fan or a multi-speed variable-speed fan, and a first probe is further disposed at a suction port of the centrifugal fan 30, the first probe is connected to a control unit of the cooker, the first probe measures a temperature of the flue gas and the tail gas flowing out of the hot fluid channel 202 and transmits the temperature to the control unit, and the control unit controls a rotation speed of the centrifugal fan 30; in this embodiment, a second probe may be further disposed on the metal plate inside the radiation cross-flow heat exchanger 21, the second probe corresponds to the upper side of the cooking range, the second probe is used for testing the flame temperature of the cooking range, and the second probe is also connected to the control unit of the cooking range. In this embodiment, the first probe and the second probe are made of a high temperature resistant and insulating material.
To avoid the oil smoke above the range from deteriorating the heat exchange capacity of the heat exchanger, the cold fluid channel air inlet 2011 of the two fluid channel heat exchanger 20 is disposed below the range. Cold air is sucked from a lower position below the stove, flows through the cold fluid channel 201 of the double-fluid channel heat exchanger 20, exchanges heat with medium-temperature flue gas in the hot fluid channel 202 to be heated, then flows into the inner cavity of the radiation cross-flow heat exchanger 21 at the lower side of the high-position flue gas outlet to further absorb heat to be heated, cools and cools a metal plate of the cavity radiation cross-flow heat exchanger, and then flows into the stove 10 to support combustion.
For a household cooking range 10 with 4kw, a circular arc type plate-fin heat exchanger is selected, and 4 heat exchangers are combined into a circle. The diameter of the arc-shaped plate-fin heat exchanger is about 30cm, the height is about 15cm, the ribbing coefficient is more than 2, and the total heat transfer area is 0.3m2The average heat transfer temperature difference is 70 ℃, and the heat regeneration power is 1500wThe above. The temperature of the smoke discharged to the outdoor is less than 150 ℃, and the heat efficiency of the stove is 70%.
In this embodiment, in order to ensure the sealing of the high-temperature flue gas to the atmosphere around the cooker, the following measures can be taken:
firstly, the upper edge of the inner side of the double-fluid channel heat exchanger 20 is directly and tightly matched with the bottom of the cooking pot 50 to form the sealing of high-temperature smoke to the atmosphere around the cooker;
referring to fig. 4 and 5, secondly, since the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21 are connected by the connecting channel 22, there is a gap between the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21, and this structure is difficult to avoid food in the pan from falling into the gap between the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21 when the cooking pot 50 is used for cooking, therefore, a cooking pot support ring 40 for preventing food in the cooking pot 50 from falling into the enclosure heat exchange area is provided above the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21, the cooking pot support ring 40 is ring-shaped, the outer edge of the cooking pot support ring 40 is provided on the two-fluid channel heat exchanger 20, the inner edge of the cooking pot support ring 40 is provided above the radiation cross-flow heat exchanger 21, and the bottom of the cooking pot 50 is tightly fitted on the cooking pot support ring 40, so as to form the sealing of the high-temperature flue gas to the atmosphere around the cooker.
Referring to fig. 6, third, an intermediate heat transfer plate 60 is disposed in the cooking area, the upper surface of the intermediate heat transfer plate 60 matches with the outline of the cooking pot 50, the upper edge of the inner side of the two-fluid channel heat exchanger 20 is hermetically connected with the outer edge of the intermediate heat transfer plate 60, so as to form a seal of the high-temperature flue gas to the atmosphere around the cooking range. When in use, the cooking pot 50 is pressed against the intermediate heat transfer plate 60 and forms a good thermal contact with the plate, i.e. the high temperature flue gas firstly transfers heat to the intermediate heat transfer plate 60, and then the intermediate heat transfer plate 60 transfers heat to the bottom of the cooking pot 50.
Referring to fig. 7A and 7B, in order to enhance the heat exchange of the flue gas, a plurality of first fins 601 may be disposed on the lower surface of the middle heat transfer plate 60, and the first fins 601 are protruded from the lower surface of the middle heat transfer plate 60, which is not limited to the shape of the first fins 601 in this embodiment; referring to fig. 8A and 8B, a plurality of second wing columns 501 may be disposed at the bottom of the cooking pot 50, which is not limited by the present invention.
The utility model discloses in, cooking pan can be sphere type or flat type, the utility model discloses do not do the restriction.
Example two
Referring to fig. 9 and 10, a high-efficiency gas cooker with a heat recovery function includes a combustion area, an enclosure area and a pan placing area for placing a cooking pan, the enclosure area is located outside the combustion area, the pan placing area is disposed above the combustion area and the enclosure area, and in order to improve the heat utilization rate of high-temperature flue gas, the high-temperature flue gas exchanges heat with cold water through medium-temperature flue gas formed by heat exchange and cooling of the high-temperature flue gas and the bottom of the cooking pan, and the cold water is heated to form sanitary hot water for people to use. In order to improve the heat utilization efficiency of high temperature flue gas more step, the utility model discloses still will follow the utilization of discharged low temperature flue gas (flue gas tail gas) in the cooking utensils, carry out the heat exchange earlier with the running water through pipe fin heat exchanger, heat up cold running water into low temperature water, then let in low temperature water the water tank, low temperature water in the water tank carries out the heat exchange with the medium temperature flue gas again, finally makes cold water sanitary hot water. Above-mentioned two kinds of schemes all are in the utility model discloses an within the protection scope, following specifically utilize flue gas tail gas in the hot water scheme of production health again to explain, concrete structure is as follows:
a cooking range 10 is arranged in the combustion area, the cooking range 10 is connected with an air inlet pipe 11, fuel gas is provided into the cooking range 10 through the air inlet pipe 11, and the cooking range 10 can generate high-temperature flue gas. In this embodiment, there is no partition in the combustion area, which is to ensure the combustion air to enter from the lower part of the cooking range and to mix with the fuel gas to support combustion.
The enclosure area comprises an inner layer enclosure device, an outer layer enclosure device and a high-level smoke outlet, and the inner layer enclosure device is arranged on the inner side of the enclosure area; the outer layer enclosing device is arranged at the outer side of the enclosing area, the outer layer enclosing device is higher than the inner layer enclosing device, and the upper edge of the outer layer enclosing device is matched with the bottom of the cooking pot; high-order flue gas air outlet communicates in the combustion area to be located inlayer enclosure's top, high-order flue gas air outlet guide is pressed close to the bottom of cooking pan by the high temperature flue gas that kitchen range 10 produced, forms the forced flow path of high temperature flue gas with cooking pan bottom formation high temperature flue gas, carries out the heat exchange with the bottom of cooking pan with the promotion high temperature flue gas. Wherein,
the inner layer enclosing device comprises
Referring to fig. 2, at least one radiation cross-flow heat exchanger 21, the radiation cross-flow heat exchanger 21 is located inside the enclosure heat exchange area, the radiation cross-flow heat exchanger 21 includes an inner cavity formed by folding a metal plate, a plurality of first fins 211 are disposed on the metal plate of the radiation cross-flow heat exchanger 21, and the inner cavity is divided into a plurality of fluid channels by the plurality of first fins 211. In this embodiment, several first fins 211 are parallel to the bottom of the radiation cross-flow heat exchanger 21 and are located on the metal plate inside the radiation cross-flow heat exchanger 21. In this embodiment, the length of the first fin 211 is smaller than the length of the metal plate inside the radiation cross-flow heat exchanger 21, that is, the first fin 211 is not disposed at the front end and the rear end of the metal plate inside the radiation cross-flow heat exchanger 21, the front ends of the first fins 211 are inlet cavities 212, the inlet cavities 212 are connected to an inlet (in this embodiment, the inlet is a water inlet) of the radiation cross-flow heat exchanger 21, the rear ends of the first fins 211 are outlet cavities 213, and the outlet cavities 213 are connected to an outlet (in this embodiment, the outlet is a water outlet) of the radiation cross-flow heat exchanger 21, such a design can reduce the resistance of water entering the radiation cross-flow heat exchanger 21. The utility model discloses do not do the restriction to the number of radiation cross-flow heat exchanger 21, inlayer enclosure promptly can include a plurality of radiation cross-flow heat exchanger 21, and every radiation cross-flow heat exchanger 21 all is the autonomous working, and every two radiation cross-flow heat exchangers 21 do not have the relevance promptly. In this embodiment, each radiation cross-flow heat exchanger 21 is an arc shape, and a plurality of the arc-shaped radiation cross-flow heat exchangers 21 are tightly connected into a circular shape. In the present invention, the working principle and the structural arrangement of each radiation cross-flow heat exchanger 21 are the same, and therefore, in describing the present embodiment, only one radiation cross-flow heat exchanger 21 will be taken as an example for detailed description. In this embodiment, the radiation cross-flow heat exchanger 21 includes a water inlet and a water outlet, the water inlet is connected to a water outlet pipeline of a water tank, and the water outlet is connected to a water inlet pipeline of the water tank.
In this embodiment, the high-level flue gas outlet is communicated with the combustion area, the high-level flue gas outlet is arranged at a high level and is located above the plurality of radiation cross-flow heat exchangers 21, and the high-level flue gas outlet guides the high-temperature flue gas to be close to the bottom of the cooking pot so as to promote the high-temperature flue gas and the bottom of the cooking pot to form a forced flow channel of the high-temperature flue gas;
the outer enclosure device comprises at least one double-fluid-channel heat exchanger 20, the double-fluid-channel heat exchangers 20 are arranged corresponding to the radiation cross-flow heat exchangers 21, namely the number of the double-fluid-channel heat exchangers 20 is equal to that of the radiation cross-flow heat exchangers 21, and one double-fluid-channel heat exchanger 20 and one radiation cross-flow heat exchanger 21 are correspondingly and relatively operated. The utility model discloses do not do the restriction to two fluid passage heat exchangers 20's number, outer enclosure can include a plurality of two fluid passage heat exchangers 20, and every two fluid passage heat exchangers 20 all are the autonomous working, do not have associatively between per two fluid passage heat exchangers 20 promptly. In the present embodiment, each of the two-fluid passage heat exchangers 20 is an arc shape, and a plurality of the arc-shaped two-fluid passage heat exchangers 20 are tightly connected to form a circular shape. In the present invention, the operation principle and the structural arrangement of each two-fluid channel heat exchanger 20 are the same, and therefore, in describing the present embodiment, only one of the two-fluid channel heat exchangers 20 will be taken as an example for detailed description. In the present embodiment, the radiation cross-flow heat exchanger 21 and the two-fluid channel heat exchanger 20 are connected by a first connecting channel 222 and a second connecting channel 221, the two-fluid channel heat exchanger 20 includes a cold fluid channel 201 and a hot fluid channel 202, the cold fluid channel 201 and the hot fluid channel 202 are separated by a partition 203, the cold fluid channel 201 is communicated with the first connecting channel 222, and the hot fluid channel 202 is communicated with the second connecting channel 221. In the present embodiment, the two-fluid channel heat exchanger 20 may be a fin type heat exchanger or a tube fin type heat exchanger.
In this embodiment, the outlet of the hot fluid channel 202 is connected to a centrifugal fan 30, the cold water in the cold fluid channel 201 exchanges heat with the middle-temperature flue gas in the hot fluid channel 202, and the middle-temperature flue gas (i.e., flue gas exhaust gas) flowing out of the outlet of the hot fluid channel 202 and cooled after heat exchange can be discharged out of the range through a centrifugal fan 30. In order to further improve the thermal efficiency of the high-temperature flue gas, the embodiment proposes that the condensation heat of the water vapor in the flue gas and the tail gas can be utilized, that is, the flue gas and the cold tap water are subjected to heat exchange firstly, so that the temperature of the flue gas is reduced to be lower than the dew point of the flue gas, and the condensation heat of the water vapor in the flue gas and the tail gas is transferred to the cold tap water. The method comprises the following specific steps:
the kitchen range further comprises a water tank 80, wherein the water tank 80 is connected with a water inlet 2012 of a cold fluid channel of the two-fluid channel heat exchanger 20 through a water outlet pipeline 802 and is connected with a water outlet 212 of the radiation cross-flow heat exchanger through a water inlet pipeline 801. In this embodiment, a water circulating pump 90 is further disposed on the water outlet pipeline 802, and the low-temperature cold water in the water tank 80 enters the tube-fin heat exchanger 100 to exchange heat with the flue gas and then flows into the stove under the driving of the water circulating pump 90. In this embodiment, the finned tube heat exchanger 100 is connected to the outlet of the centrifugal fan 30, one end of a water pipe 1005 in the finned tube heat exchanger 100 is connected to tap water, and the other end is connected to the water tank 80, the flue gas exhaust is subjected to heat exchange with cold tap water through the finned tube heat exchanger 100, so as to reduce the temperature of the flue gas to below the dew point of the flue gas, thereby transferring the condensation heat of the water vapor in the flue gas exhaust to the cold tap water, the cold tap water absorbs heat and becomes low-temperature water, and then the low-temperature water is introduced into the water tank 80, and then the low-temperature water introduced into the water tank 80 flows into the cold fluid channel 201 of the two-fluid channel heat exchanger 20 through the water outlet pipeline 802, and is subjected to heat exchange with the medium-temperature flue gas in the hot fluid channel 202 to become high-temperature water, the high-temperature water enters the radiation cross-flow heat exchanger 21 through, sanitary hot water is again introduced into the water tank through the water inlet line of the water tank 80 for use by people.
Referring to fig. 11, the tube-fin heat exchanger 100 includes a housing, which includes an upper housing 1001, a lower housing 1002 and two side plates 1003, wherein the housing forms an air inlet and an air outlet, the air inlet of the housing is connected to the air outlet of the centrifugal fan 30, and the air outlet of the housing is connected to the outside atmosphere; a plurality of fins 1004 are disposed within the housing and water tubes 1005 of the tube and fin heat exchanger 100 are shuttled within the plurality of fins 1004. In this embodiment, one end of the water pipe 1005 is connected to tap water, and the other end is connected to the water tank 80.
In the present embodiment, the combustion air is introduced directly from below the burner 10.
In this embodiment, the first connection channel 222 and the second connection channel 221 are connected to the bottom of the radiation cross flow heat exchanger 21 and the two-fluid channel heat exchanger 20.
In this embodiment, tap water is introduced into the water pipe of the tube-fin heat exchanger 100 to exchange heat with low-temperature flue gas discharged from the centrifugal fan 30 (i.e. flue gas exhaust gas discharged from the outlet of the hot fluid channel of the two-fluid channel heat exchanger) to heat up to low-temperature water, the low-temperature water is introduced into the water tank 80, the low-temperature water in the water tank 80 flows into the cold fluid channel 201 from the water inlet 2012 of the cold fluid channel, the low-temperature water in the cold fluid channel 201 exchanges heat with the medium-temperature flue gas in the hot fluid channel 202, the medium-temperature flue gas cooled after heat exchange can be discharged to the fins 1004 of the tube-fin heat exchanger 100 through the centrifugal fan 30, the heated low-temperature water after heat exchange becomes high-temperature water, and flows into the first connecting channel 222 from the water outlet of the cold fluid channel 201, flows into the radiation cross-flow heat exchanger 21 from the water outlet of the first connecting channel 222, and is heated by heat radiation again to become sanitary, and from the water outlet 212 of the radiant cross-flow heat exchanger through the water inlet line 801 of the water tank 80 into the water tank 80 again. Because when the sanitary hot water flows in the radiation cross-flow heat exchanger 21, a part of heat on the radiation cross-flow heat exchanger 21 can be taken away, so as to play a role in cooling the radiation cross-flow heat exchanger 21, in order to increase the heating area of the sanitary hot water in the radiation cross-flow heat exchanger 21, a plurality of first fins 211 are arranged in the inner cavity of the radiation cross-flow heat exchanger 21.
In this embodiment, the centrifugal fan 30 may be a variable-frequency variable-speed fan or a multi-speed variable-speed fan, and a first probe is further disposed at a suction port of the centrifugal fan 30, the first probe is connected to a control unit of the cooker, the first probe measures a temperature of the flue gas and the tail gas flowing out of the hot fluid channel 202 and transmits the temperature to the control unit, and the control unit controls a rotation speed of the centrifugal fan 30; in this embodiment, a second probe may be further disposed on the metal plate inside the radiation cross-flow heat exchanger 21, the second probe corresponds to the upper side of the cooking range, the second probe is used for testing the flame temperature of the cooking range, and the second probe is also connected to the control unit of the cooking range. In this embodiment, the first probe and the second probe are made of a high temperature resistant and insulating material.
For a household cooking range 10 with 4kw, a group of 4 circular-arc tube-fin heat exchangers are selected to be combined into a circle. The diameter of the arc-shaped finned heat exchanger is about 30cm, the height of the heat exchanger is about 15cm, the ribbing coefficient is more than 2, and the total heat transfer area is 0.3m2The average heat transfer temperature difference is 70 ℃, and the heat regeneration power is more than 1500 w. The temperature of the flue gas discharged to the outdoor is less than 150 ℃, and the heat efficiency of the stove is more than 70%.
The following describes the flue gas heat exchange in the order of flue gas heat exchange:
firstly, in a combustion area, high-temperature flue gas generated in a cooking range is close to the bottom of a cooking pot along a high-position flue gas outlet and exchanges heat with the cooking pot to become medium-temperature flue gas;
secondly, in the double-fluid-channel heat exchanger, low-temperature water in the cold fluid channel exchanges heat with medium-temperature flue gas in the hot fluid channel to change the low-temperature water into medium-temperature water;
thirdly, when the cooking range generates high-temperature flue gas, the high-temperature flue gas has strong thermal radiation, the thermal radiation exchanges heat with the radiation cross-flow heat exchanger, the radiation cross-flow heat exchanger absorbs heat to raise the temperature, and medium-temperature water from the two-fluid channel heat exchanger flowing into the inner cavity of the radiation cross-flow heat exchanger is further raised in temperature to produce sanitary hot water;
fourthly, the tail gas of the flue gas discharged from the hot fluid channel of the double-fluid channel heat exchanger exchanges heat with cold water introduced from a tap water pipeline, and the cold water is changed into low-temperature water and then is injected into the water tank.
In this embodiment, in order to ensure the sealing of the high-temperature flue gas to the atmosphere around the cooker, the following measures can be taken:
firstly, the upper edge of the inner side of the double-fluid channel heat exchanger 20 is directly and tightly matched with the bottom of the cooking pot 50 to form the sealing of high-temperature smoke to the atmosphere around the cooker;
referring to fig. 4 and 5, secondly, since the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21 are connected by the connecting channel 22, there is a gap between the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21, and this structure is difficult to avoid food in the pan from falling into the gap between the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21 when the cooking pot 50 is used for cooking, therefore, a cooking pot support ring 40 for preventing food in the cooking pot 50 from falling into the enclosure heat exchange area is provided above the two-fluid channel heat exchanger 20 and the radiation cross-flow heat exchanger 21, the cooking pot support ring 40 is ring-shaped, the outer edge of the cooking pot support ring 40 is provided on the two-fluid channel heat exchanger 20, the inner edge of the cooking pot support ring 40 is provided above the radiation cross-flow heat exchanger 21, and the bottom of the cooking pot 50 is tightly fitted on the cooking pot support ring 40, so as to form the sealing of the high-temperature flue gas to the atmosphere around the cooker.
Thirdly, an intermediate heat transfer plate 60 is arranged in the pan placing area, the upper surface of the intermediate heat transfer plate 60 is matched with the outline of the cooking pan 50, the upper edge of the inner side of the double-fluid channel heat exchanger 20 is hermetically connected with the outer edge of the intermediate heat transfer plate 60, and the sealing of high-temperature smoke to the atmosphere around the cooking range is formed. When in use, the cooking pot 50 is seated on the intermediate heat transfer plate 60, i.e. the high temperature flame firstly transfers heat to the intermediate heat transfer plate 60, and then the intermediate heat transfer plate 60 transfers heat to the bottom of the cooking pot 50.
Referring to fig. 7A and 7B, in order to enhance the heat exchange of the flue gas, a plurality of first fins 601 may be disposed on the lower surface of the middle heat transfer plate 60, and the first fins 601 are protruded from the lower surface of the middle heat transfer plate 60, which is not limited to the shape of the first fins 601 in this embodiment; referring to fig. 8A and 8B, a plurality of second wing columns 501 may be disposed at the bottom of the cooking pot 50, which is not limited by the present invention.
The utility model discloses in, cooking pan can be sphere type or flat type, the utility model discloses do not do the restriction.
The above disclosure is only for the purpose of describing several embodiments of the present application, but the present application is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present application.
Claims (15)
1. The utility model provides a take high-efficient gas cooking utensils of backheating function, its characterized in that, include combustion area, enclosure heat transfer district and be used for placing putting the pot district of cooking pan, enclosure heat transfer position in the outside of combustion area, it sets up to put the pot district the combustion area with enclosure heat transfer district top:
a cooking range is arranged in the combustion area, and the cooking range can generate high-temperature flue gas;
the enclosure heat exchange area comprises a plurality of radiation cross-flow heat exchangers, a high-level flue gas outlet and a plurality of double-fluid channel heat exchangers, and the radiation cross-flow heat exchangers are positioned on the inner side of the enclosure heat exchange area; the high-level flue gas outlet is communicated with the combustion area, the high-level flue gas outlet is arranged at a high level and is positioned above the plurality of radiation cross-flow heat exchangers, and the high-level flue gas outlet guides the high-temperature flue gas to be close to the bottom of the cooking pot so as to promote the high-temperature flue gas and the bottom of the cooking pot to form a forced flow channel of the high-temperature flue gas;
the double-fluid channel heat exchanger is matched and connected with the radiation cross-flow heat exchanger, the double-fluid channel heat exchangers are positioned outside the enclosure heat exchange area, the double-fluid channel heat exchanger is higher than the radiation cross-flow heat exchanger, and the upper edges of the double-fluid channel heat exchangers are matched with the bottom of the cooking pot; a first connecting channel and a second connecting channel are arranged between the radiation cross-flow heat exchanger and the two-fluid-channel heat exchanger, the two-fluid-channel heat exchanger comprises a cold fluid channel and a hot fluid channel, the cold fluid channel is connected with a heated medium and is communicated with the first connecting channel, and the first connecting channel is communicated with the radiation cross-flow heat exchanger; the second connecting channel is communicated with medium-temperature flue gas which is formed by heat exchange and temperature reduction of high-temperature flue gas passing through the high-position flue gas outlet and the bottom of the cooking pan, the second connecting channel is communicated with the hot fluid channel, and the air outlet of the hot fluid channel is communicated to the outside atmosphere;
the high-temperature flue gas passing through the high-position flue gas outlet exchanges heat with the bottom of the cooking pan and is cooled to form medium-temperature flue gas, and the medium-temperature flue gas flows into the second connecting channel from the inlet of the second connecting channel to the hot fluid channel; and the heated medium after heat exchange flows into the first connecting channel from the outlet of the cold fluid channel to the radiation cross-flow heat exchanger and flows out from the outlet of the radiation cross-flow heat exchanger.
2. A high efficiency gas cooker with heat rejuvenator function as claimed in claim 1 wherein the outlet of said hot fluid path is connected to a centrifugal fan.
3. The efficient gas cooker with the backheating function as claimed in claim 2, wherein a first probe for measuring the temperature of the flue gas and the tail gas is further arranged at the suction port of the centrifugal fan, and the first probe is connected with a control unit of the cooker to control the rotation speed of the centrifugal fan.
4. The efficient gas cooker with the heat-returning function of claim 3, wherein a second probe for testing the flame temperature of the cooking range is further disposed on the metal plate inside the radiation cross-flow heat exchanger, and the second probe corresponds to the upper portion of the cooking range and is connected to the control unit of the gas cooker to control the rotation speed of the centrifugal fan.
5. A high efficiency gas cooker with a heat rejuvenation function as claimed in claim 1 wherein each of the radiation cross flow heat exchangers is circular arc shaped, each of the radiation cross flow heat exchangers is independent individual, a plurality of circular arc shaped radiation cross flow heat exchangers are tightly connected into a circle, correspondingly, each of the two fluid channel heat exchangers is circular arc shaped, each of the two fluid channel heat exchangers is independent individual, and a plurality of the two fluid channel heat exchangers are tightly connected into a circle.
6. The high-efficiency gas cooker with the heat-returning function of claim 2, wherein the heated medium is cold combustion air, the cold combustion air enters from an inlet of a cold fluid channel of the two-fluid channel heat exchanger, the cold air inlet is arranged below the cooker, and an outlet of the radiation cross-flow heat exchanger is communicated to the combustion area to provide the heated combustion air for the cooking range.
7. The efficient gas cooker with the heat-returning function as claimed in claim 2, wherein the heated medium is cold water, the gas cooker further comprises a water tank, the water tank is connected with the inlet of the cold fluid channel of the two-fluid channel heat exchanger through a water outlet pipeline, the water tank is connected with the outlet of the radiation cross-flow heat exchanger through a water inlet pipeline, and the water outlet pipeline is further connected with a circulating water pump.
8. The efficient gas cooker with the backheating function as claimed in claim 7, wherein the air outlet of the centrifugal fan is further connected with a tube-fin heat exchanger, one end of a water pipe in the tube-fin heat exchanger is connected with tap water, and the other end of the water pipe is connected with the water tank.
9. A high efficiency gas cooker with a heat rejuvenator as claimed in claim 1 wherein said radiant cross flow heat exchanger comprises an inner cavity folded from a metal plate, said metal plate of said radiant cross flow heat exchanger being provided with a plurality of first fins, said first fins dividing said inner cavity into a plurality of fluid channels.
10. The high-efficiency gas cooker with the backheating function as claimed in claim 9, wherein the plurality of first fins are parallel to the bottom of the radiation cross-flow heat exchanger, the front ends of the plurality of first fins are inlet cavities, the inlet cavities are connected with the inlet of the radiation cross-flow heat exchanger, the rear ends of the plurality of first fins are outlet cavities, and the outlet cavities are connected with the outlet of the radiation cross-flow heat exchanger.
11. The high-efficiency gas cooker with the backheating function as claimed in claim 1, wherein the upper edge of the double-fluid channel heat exchanger is tightly matched with the bottom of a cooking pot to form a seal of high-temperature flue gas to the atmosphere around the cooker.
12. The efficient gas cooker with the heat-returning function as claimed in claim 1 or 11, wherein a cooker supporting ring for preventing the food in the cooker from falling into the enclosure heat-exchanging area is disposed in the cooker-placing area, the bottom of the cooker is tightly fitted on the cooker supporting ring, the cooker supporting ring is annular, the outer edge of the cooker supporting ring is disposed on the outer enclosure, and the inner edge of the cooker supporting ring is disposed above the inner enclosure.
13. The efficient gas cooker with the backheating function as claimed in claim 1, wherein an intermediate heat transfer plate is arranged in the pot placing area, the upper surface of the intermediate heat transfer plate is matched with the outline of the cooking pot, and the upper edge of the outer layer enclosing device is hermetically connected with the edge of the intermediate heat transfer plate to form the seal of high-temperature flue gas to the atmosphere around the cooker.
14. The high-efficiency gas cooker with the backheating function as claimed in claim 13, wherein the lower surface of the middle heat transfer plate is provided with a plurality of first fins for reinforcing heat exchange of flue gas.
15. The high efficiency gas cooker with the backheating function as claimed in claim 1, wherein the bottom of the cooking pot is provided with a plurality of second fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204344141U CN202813469U (en) | 2012-08-29 | 2012-08-29 | Efficient gas cooker with reheating function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204344141U CN202813469U (en) | 2012-08-29 | 2012-08-29 | Efficient gas cooker with reheating function |
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| Publication Number | Publication Date |
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| CN202813469U true CN202813469U (en) | 2013-03-20 |
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| CN2012204344141U Expired - Lifetime CN202813469U (en) | 2012-08-29 | 2012-08-29 | Efficient gas cooker with reheating function |
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| CN (1) | CN202813469U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788371A (en) * | 2012-08-29 | 2012-11-21 | 上海伯涵热能科技有限公司 | Efficient gas cooking appliance with backheating function |
| CN103196163A (en) * | 2013-04-12 | 2013-07-10 | 西北工业大学 | Totally-enclosed impact heat exchange gas cooker |
-
2012
- 2012-08-29 CN CN2012204344141U patent/CN202813469U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788371A (en) * | 2012-08-29 | 2012-11-21 | 上海伯涵热能科技有限公司 | Efficient gas cooking appliance with backheating function |
| CN103196163A (en) * | 2013-04-12 | 2013-07-10 | 西北工业大学 | Totally-enclosed impact heat exchange gas cooker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130320 Effective date of abandoning: 20150107 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130320 Effective date of abandoning: 20150107 |
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| RGAV | Abandon patent right to avoid regrant |