An energy-saving cooker

Abstract

The present invention discloses an energy-saving cooker, which comprises a base. A furnace frame, a housing and a cover plate are arranged on the base, and an inner furnace and an outer furnace are formed. A stove opening for placing a pot into the inner furnace and fitting with the bottom of the pot is arranged on the cover plate. A spiral fire wall rising spirally along the inner wall is arranged on the furnace frame. A diffraction fire wall for separating the spiral channel between two adjacent spiral fire walls into multiple spiral rising fire channels is arranged between two adjacent spiral fire walls. The spiral fire wall and the diffraction fire wall form a spiral pot rack for supporting the pot and fitting with the bottom of the pot. A fire pan opening is arranged at the bottom of the furnace frame, and a fire pan is arranged at the fire pan opening. An annular fire retaining wall is arranged outside the spiral pot rack. An annular smoke exhaust duct is arranged at the upper part of the outer furnace. A smoke exhaust opening communicating with the smoke exhaust duct is arranged on the cover plate. Outer through openings and inner through openings which are small near the smoke exhaust opening and large far away from the smoke exhaust opening are respectively arranged between the furnace frame and the cover plate and between the fire retaining wall and the bottom of the pot. It has the functions of prolonging fire and equalizing fire, and has high thermal efficiency.

Description

Technical Field

[0001] The present invention relates to an energy-saving cooking stove. Background Art

[0002] With the development of the economy, energy consumption is increasing, prices are rising, the environment is deteriorating day by day, and the global average temperature is gradually rising. Therefore, it is strongly advocated to adopt new technologies to save energy and reduce emissions to ensure an ideal long-term and sustainable development environment. Three meals a day are essential. Although induction cookers, microwave ovens, rice cookers, etc. can boil water and cook rice, high-temperature cooking and stir-frying over an open flame are still the mainstream trends. According to the announcements of authoritative structures, the thermal efficiency of current gas stoves on the market is only 40% - 55%. Therefore, there is broad prospects for the research and development of highly efficient energy-saving cooking stoves.

[0003] Current status and defects of the development of cooking stove technology:

[0004] 1. Comparison of the advantages and disadvantages of firewood stoves and gas stoves:

[0005] Humans have gone through a process from cooking with hanging pots (earthenware pans) to burying pots for cooking, from ordinary stoves to firewood-saving stoves, and from ordinary gas stoves to various energy-saving gas stoves, from being cumbersome, smoky, roasting, and firewood-consuming to being easy to smoke, enclosed, firewood-saving, and gas-saving. Firewood stoves burn firewood and straw, which are heavy, time-consuming, smoky, and dusty, while gas stoves burn gas, which is easy, convenient, less smoky, and dust-free. However, firewood-saving stoves are superior to gas stoves in the following aspects: a. It has no electric smoking, reducing harmful gases and dust in the kitchen; b. It burns in a closed manner, preventing wind, storing energy, and keeping warm, reducing convective radiation; c. It extends the crawling distance of the flame from the bottom of the pot to the edge of the pot, effectively utilizing heat energy.

[0006] 2. Fin energy-saving technology

[0007] Some flat pans on the market are welded with heat-absorbing fins 2 - 5 cm high that radiate in all directions at the bottom, and some also have a heat-locking ring added to the edge of the pot. It increases the heat absorption area of the bottom of the pot by 4 - 5 times and burns in a closed manner, greatly improving the thermal efficiency. They can be used for boiling water and making soup, but not for stir-frying over an open flame. The fins at the bottom of the pot are prone to damage and deformation when dry-burning, and are also prone to touch damage. The weight of the pot itself increases, and the market does not look favorably on it. Some pointed-bottom pans are also die-cast with fins, but a heat-locking ring cannot be die-cast, so closed combustion cannot be achieved, and the energy-saving effect is not obvious.

[0008] 3. Energy-saving ring for cooking stoves

[0009] It imitates the traditional cooking stove, allowing the flame of the gas stove to burn in a relatively enclosed environment, which can prevent wind, keep warm, store energy, reduce convection and radiation, and is significantly more energy-efficient compared to gas stoves without an energy-saving ring. Since the pot, stove, energy-saving ring, and burner pan are usually not produced by the same manufacturer, the distance between them generally cannot be adjusted. If the distance between the pot and the burner pan is too large, it will waste gas; if the distance is too small, it will suppress the fire, blacken the pot, and cause incomplete combustion. In addition, the upper end of the energy-saving ring cannot be closed, and various through-holes for discharging smoke and fire need to be set, which poses a hidden danger of the fire being extinguished due to overflowing of the pot.

[0010] 4. Swirling Fire Technology

[0011] The flame of a gas stove can be divided into direct fire and oblique fire. The direct fire holes are circular and perpendicular to the plane of the burner pan. The flame shoots directly at the bottom of the pot, with strong and fierce firepower and smooth flame, which is suitable for flat-bottomed pans. Swirling fire means that the oblique fire holes are strip-shaped and inclined to the plane of the burner pan. The flame shoots obliquely at the bottom of the pot. Overall, the flame appears as a rising whirlwind-like shape surrounding the center of the bottom of the pot. Oblique fire is suitable for any pot shape, and the contact area between the flame and the bottom of the pot is relatively large, which is more energy-efficient than direct fire. The straight line between two points is the shortest, while the oblique fire follows the hypotenuse of a right triangle, and the distance for the flame to transport heat energy to the bottom of the pot is relatively long, and the heat loss is bound to be more. If the flame is made to shoot directly at the bottom of the pot, and the rising whirlwind-like flame surrounds the bottom of the pot and then rotates upward towards the edge of the pot, it can take the advantages of both, make up for their shortcomings, and also extend the crawling distance of the flame from the bottom of the pot to the edge of the pot.

[0012] 5. Waste Heat Utilization Technology

[0013] There have been two waste heat utilization technologies in the prior art. One is to use the high-temperature steam, oil fume, and high-temperature waste gas generated by the gas stove for cooking, which are absorbed by an exhaust fan and then used as combustion-supporting gases. The other is to surround the burner pan with a basin-shaped water pipe to heat water. Although the temperature of the combustion-supporting gas in the former is high, most of the oxygen is depleted, and there is water vapor, so it is not suitable as a combustion-supporting gas. The latter is too close to the bottom of the pot and competes with the bottom of the pot for heat, which is suspected of robbing the main food.

[0014] 6. Defects of Atmospheric Combustion of Gas Stoves

[0015] Currently, the gas stoves on the market are generally atmospheric gas stoves. That is, high-speed and high-energy gas is ejected from the nozzle and enters the contraction pipe of the injector, simultaneously driving the surrounding static air into the mixing pipe for mixing, then entering the diffuser pipe to decelerate and reduce pressure, and finally reaching the burner holes on the burner pan to ignite the fire. The ideal combustion state is that the more gas, the more combustion-supporting air is required, and the less gas, the less combustion-supporting air is required. The amount of combustion-supporting air entering the mixing pipe is determined by the air damper. The size of the air damper is generally determined by adjusting the flame to pure blue (i.e., the optimal combustion state) at medium fire. That is, the air damper is not adjusted during actual operation for high fire and low fire. In this way, there is relatively excessive combustion-supporting air for low fire, which takes away heat energy; while for high fire, there is relatively insufficient combustion-supporting air, the flame turns red, and the gas burns incompletely, wasting gas.

[0016] From firewood-saving stoves to gas-saving stoves, people have been constantly developing in the direction of firewood-saving, gas-saving, energy-saving, high-efficiency, clean and environmentally friendly. Each of the above-mentioned various technologies has its own advantages and disadvantages. Can they be skillfully combined to avoid their defects and give full play to their advantages to design a brand-new energy-saving pot stove? In response to this situation and vision, through years of painstaking research and development, this invention is made based on this situation. Summary of the Invention

[0017] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an energy-saving pot stove with a simple structure, energy-saving, high-efficiency, high thermal utilization efficiency, clean and environmentally friendly.

[0018] The present invention is realized through the following technical solutions:

[0019] An energy-saving pot stove, characterized in that: it includes a base, above the base is provided with a furnace frame in a bowl shape, the outer side of the furnace frame is surrounded by a housing, the furnace frame and the housing are covered with a cover plate, an inner furnace is formed between the inside of the furnace frame and the cover plate, on the cover plate inside the furnace frame is provided a stove opening for placing a pot into the inner furnace and fitting with the bottom of the pot, on the furnace frame is provided a spiral extended fire wall spirally rising from the bottom of the inner furnace to the upper part along the inner wall of the furnace frame, there are more than two spiral extended fire walls and they are evenly distributed circumferentially, between adjacent two spiral extended fire walls is provided a diffraction extended fire wall spirally rising from the bottom to the upper part along the inner wall of the furnace frame, the spiral extended fire wall and the diffraction extended fire wall form a spiral pot rack for supporting the pot and fitting with the bottom of the pot, the diffraction extended fire wall divides the spiral channel between two spiral extended fire walls into multiple spiral rising extended fire channels, on the inner wall of the furnace frame outside the spiral pot rack is provided an annular fire blocking wall for blocking the fireworks spirally rushing out from the extended fire channels, at the bottom of the furnace frame is provided a fire pan opening penetrating the furnace frame inside and outside, at the fire pan opening is provided a fire pan, inside the base is provided a cavity communicated with the fire pan opening, at the bottom of the base is provided an air channel connecting the cavity with the outside, an outer furnace is formed between the housing, the furnace frame and the cover plate, the outer furnace includes an annular smoke exhaust duct located at the upper part, on the cover plate is provided a smoke exhaust opening corresponding to the smoke exhaust duct, at the top of the furnace frame is provided an outer notch gradually becoming larger from the near side to the far side of the smoke exhaust opening, between the furnace frame and the cover plate at the outer notch forms an outer through opening that is small near the smoke exhaust opening and large away from the smoke exhaust opening, at the top of the fire blocking wall is provided an inner notch gradually becoming larger from the near side to the far side of the smoke exhaust opening, between the fire blocking wall and the bottom of the pot at the inner notch forms an inner through opening that is small near the smoke exhaust opening and large away from the smoke exhaust opening.

[0020] An energy-saving pot stove as described above, characterized in that: between adjacent two spiral extended fire walls are provided multiple diffraction extended fire walls, and the multiple diffraction extended fire walls are sequentially rotationally spaced from the outer spiral extended fire wall to the inner spiral extended fire wall.

[0021] An energy-saving cooking stove as described above, characterized in that: the smoke exhaust port is arranged at a position corresponding to the outlet of the flame extension channel formed by the diffraction flame extension wall.

[0022] An energy-saving cooking stove as described above, characterized in that: the spiral flame extension wall and the diffraction flame extension wall are respectively perpendicular to the bottom of the pot and fit on the bottom of the pot.

[0023] An energy-saving cooking stove as described above, characterized in that: the part of the spiral pot rack located at the position of the fire pan opening is suspended, and is concave upward to form a fire pan groove buckled above the fire pan, and there is a gap of 0.5 cm to 1.5 cm between the bottom of the fire pan groove and the fire pan.

[0024] An energy-saving cooking stove as described above, characterized in that: a blower is arranged in the inner cavity on the base, a shunt is connected to the air outlet of the blower for shunting air, the first shunt pipe of the shunt and the gas pipe are connected to the fire pan through a pipeline via an injector, the second shunt pipe of the shunt leads to the lower part of the fire pan and blows air towards the fire pan, and the cross-section of the second shunt pipe is larger than that of the first shunt pipe.

[0025] An energy-saving cooking stove as described above, characterized in that: the spiral pot rack has a flat-bottom structure for use with a flat pan.

[0026] An energy-saving cooking stove as described above, characterized in that: the fire pan has a direct-fire flame structure with the fire holes perpendicular to the plane of the fire pan.

[0027] An energy-saving cooking stove as described above, characterized in that: the outer furnace also includes a heat-insulating layer located below the smoke exhaust duct. The heat-insulating layer is made of perlite.

[0028] An energy-saving cooking stove as described above, characterized in that: a chimney is arranged above the smoke exhaust port, the chimney includes a heat-absorbing pipe with an inner wall capable of absorbing heat, the pipe wall of the heat-absorbing pipe has a hollow water cavity, an endothermic spiral rack capable of absorbing heat and spirally rising from the bottom and used for blocking the vertical rise of the flue gas is arranged on the inner wall of the heat-absorbing pipe, a water inlet for injecting water into the water cavity and a water outlet for discharging the water in the water cavity are arranged on the heat-absorbing pipe.

[0029] An energy-saving cooking stove as described above, characterized in that: corresponding glass windows for observing the fire power situation of the inner furnace are arranged on the outer shell and the furnace rack.

[0030] An energy-saving cooking stove as described above, characterized in that: a transparent water level pipe communicating with the water cavity is arranged outside the heat-absorbing pipe for displaying the water level in the water cavity.

[0031] An energy-saving cooker as described above, characterized in that: the blower has multiple wind force adjustments and is controlled in linkage through a fire power adjustment switch. When the fire power adjustment switch is started, the blower is turned on while the gas is turned on. When the fire power of the fire plate is increased, the wind force of the blower is increased, and when the fire power of the fire plate is decreased, the wind force of the blower is decreased.

[0032] An energy-saving cooker as described above, characterized in that: the injector includes a nozzle, a primary air inlet, a contraction pipe, a mixing pipe and a diffuser pipe. The nozzle includes a gas nozzle for connecting with a gas pipe and an air nozzle for connecting with the first shunt pipe of a shunt. The air nozzle surrounds the outside of the gas nozzle, and a channel for air flow is formed between the air nozzle and the gas nozzle.

[0033] An energy-saving cooker as described above, characterized in that: a flared opening is provided at the outlet end of the second shunt pipe of the shunt.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. The energy-saving cooker has a double-layer heat-insulating furnace with an inner furnace and an outer furnace, which greatly reduces the convective radiation of the flames at the bottom of the pot, and also has the functions of wind prevention, energy storage and heat preservation. It also solves the hidden danger of the pot overflowing and extinguishing the fire, and further prevents the combustion exhaust gas from diffusing into the kitchen. The annular heat-insulating layer locks most of the heat of the flames at the bottom of the pot, prompting the flames to transfer the heat to the bottom of the pot and the spiral pot rack in close contact with it. By blocking the flames from climbing directly upwards along the bottom of the pot through the spiral pot rack, the speed of the flames crawling is reduced by the spiral blocking of the flames, and the direction of the flames is changed, making the flames spiral upwards, extending the distance of the flames crawling from the bottom of the pot to the edge of the pot, extending the time of the flames kissing the bottom of the pot, improving the thermal efficiency, and dividing the flames into multiple strands from the bottom through the spiral pot rack, so that each strand of flames spirally climbs along its respective flame extension channel and evenly kisses the bottom of the pot; at the same time, since the smoke exhaust port is a smoke suction port, the closer to the smoke exhaust port, the greater the suction force. The outer through port and the inner through port are set to be smaller near the smoke exhaust port and larger away from the smoke exhaust port. Through the double blocking of the fire blocking wall and the furnace rack, the crawling speed of the smoke and fire in the flame extension channel is reduced, so that the flame extension channel with an outlet closer to the smoke exhaust port has a strong fire blocking ability and a weak smoke and fire passing ability at its outlet, forming a large suction for the flame extension channel near the smoke exhaust port and a small channel for the smoke and fire to pass through. On the contrary, the flame extension channel with an outlet far from the smoke exhaust port has a small suction and a large channel for the smoke and fire to pass through. Thus, the crawling speed of the smoke and fire in each flame extension channel is balanced, realizing annular flame extension and uniform fire smoking, enabling the flame extension and uniform fire to act simultaneously and jointly improving the thermal efficiency, and the heat utilization efficiency is higher.

[0036] 2. The fire plate has a direct fire flame structure with fire holes perpendicular to the plane of the fire plate, minimizing the path of the flames ejected from the fire plate to the bottom of the pot and reducing heat loss.

[0037] 3. Since the spiral pot rack is fixed on the furnace rack, only by using a matching pot, i.e., a pot with bottom fins, it has the function of enhancing efficiency without increasing the weight of the pot itself. It remains as light as before, is convenient to use, and increases the heat receiving area at the bottom of the pot. Moreover, the spiral flame wall, diffraction flame wall, and fire baffle are made of cast iron with a thickness of 0.15 cm to 0.2 cm, which can withstand high temperatures and calcination, and has good resistance to deformation.

[0038] 4. The energy-saving stove controls the air blower wind force adjustment and the fire power adjustment switch in a linkage manner. By synchronously matching the air blower speed control switch and the gas fire power adjustment switch together, the air and gas change synchronously with the fire power size, achieving the best combustion state.

[0039] 5. The energy-saving stove allows a small part of the air and gas to be mixed in the injector synchronously with the fire power size, and allows most of the air to rush upward from the bottom of the fire pan, so that the above-mentioned air-gas mixture reaches a better combustion ratio when burning on the surface of the fire pan, solving the problem of relatively insufficient combustion-supporting air compared with closed combustion and the problem of backfire in the blast injection technology.

[0040] 6. The energy-saving stove can jointly avoid the phenomena of backfire and relatively insufficient combustion-supporting air in closed combustion through the blowing force of the air blower from the bell mouth and the suction force during smoking.

[0041] 7. Smoking is carried out through the connection between the chimney and the smoke exhaust port. The chimney has a hollow water chamber and a heat-absorbing spiral rack for blocking the vertical rise of the flue gas and capable of absorbing heat. Without affecting smoking, the slope of the spiral rise of the heat-absorbing spiral rack is reduced, and the speed of the high-temperature waste flue gas passing through the heat-absorbing spiral rack is delayed, so that the heat-absorbing spiral rack can better absorb the heat of the waste flue gas and heat the water in the water chamber. These hot waters can be used for daily use, realizing the recycling of waste heat, saving energy and reducing consumption. Through the heat recovery of the high-temperature waste gas by the chimney, the temperature of the discharged high-temperature waste gas is greatly reduced, and the damage to the range hood caused by the high-temperature waste gas is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The following further details the specific embodiments of the present invention in conjunction with the drawings, where:

[0043] Figure 1 is a sectional view of the state of an energy-saving stove of the present invention with a pot placed on it;

[0044] Figure 2 is Figure 1 the partial enlarged view A in

[0045] Figure 3 is a top view of the state of an energy-saving stove of the present invention without a pot placed on it

[0046] Figure 4It is a top view of the combined structure of the outer shell, the furnace frame and the spiral pot rack when the cover plate of the present invention is removed;

[0047] Figure 5 It is a cross-sectional view of the combined structure of the outer shell, the furnace frame, the cover plate and the base;

[0048] Figure 6 It is a schematic structural diagram of the inner through-opening formed between the inner notch of the fire baffle and the bottom surface of the pot;

[0049] Figure 7 It is a schematic structural diagram when the fire baffle is unfolded;

[0050] Figure 8 It is a side view of the combined structure of the outer shell, the furnace frame, the cover plate and the base. Specific Embodiments

[0051] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0052] As Figures 1 to 8 shown, an energy-saving cooking stove includes a base 1. Above the base 1, there is a bowl-shaped furnace frame 2. The outer side of the furnace frame 2 is surrounded by an outer shell 3. Above the furnace frame 2 and the outer shell 3, there is a cover plate 4. Between the inside of the furnace frame 2 and the cover plate 4, an inner furnace 101 is formed. On the cover plate 4, inside the furnace frame 2, there is a stove opening 41 for the pot 10 to be placed into the inner furnace 101 and fit with the bottom of the pot. On the furnace frame 2, there are two spiral fire baffles 51 spirally rising from the middle area at the bottom of the inner furnace 101 along the inner wall of the furnace frame 2 and evenly distributed circumferentially, forming a double-ring thread, as Figure 3 and Figure 4, a diffraction fire wall 52 that spirally ascends from the bottom to the top along the inner wall of the furnace frame 2 is provided between two adjacent spiral fire walls 51. Of course, there can be multiple spiral fire walls 51. The spiral fire walls 51 and the diffraction fire wall 52 form a spiral pot support 5 for supporting the pot 10 and conforming to the bottom of the pot. The diffraction fire wall 52 divides the spiral channel between the two spiral fire walls 51 into multiple spirally ascending fire channels 50. An annular fire baffle 6 for blocking the fireworks spirally ejected from the fire channels 50 is provided on the inner wall of the furnace frame 2 outside the spiral pot support 5. A fire pan opening 21 that penetrates the furnace frame 2 inside and outside is provided at the bottom of the furnace frame 2. A fire pan 7 is provided at the fire pan opening 21. An inner cavity 11 communicating with the fire pan opening 21 is provided inside the base 1. An air channel 12 that communicates the inner cavity 11 with the outside is provided at the bottom of the base 1. An outer furnace 102 is formed between the outer shell 3, the furnace frame 2, and the cover plate 4. The outer furnace 102 includes an annular smoke exhaust duct 100 located at the upper part. A smoke exhaust opening 42 corresponding to the smoke exhaust duct 100 is provided on the cover plate 4. An outer notch 22 that gradually becomes larger from the near side to the far side of the smoke exhaust opening 42 is provided at the top of the furnace frame 2. An outer through opening 20 that is small near the smoke exhaust opening 42 and large far from the smoke exhaust opening 42 is formed between the furnace frame 2 and the cover plate 4 at the outer notch 22. The outer through opening 20 communicates the smoke exhaust duct 100 and the inner furnace 101 from the top of the furnace frame 2. The fire baffle 6 divides the space between the furnace frame 2 and the bottom of the pot into upper and lower parts. An inner notch 61 that gradually becomes larger from the near side to the far side of the smoke exhaust opening 42 is provided at the top of the fire baffle 6. An inner through opening 60 that is small near the smoke exhaust opening 42 and large far from the smoke exhaust opening 42 is formed between the fire baffle 6 and the bottom of the pot at the inner notch 61. The inner through opening 60 communicates the spaces above and below the fire baffle 6, enabling the smoke in the fire channels 50 below the fire baffle 6 to flow from the inner through opening 60 to the space above the fire baffle 6, and then flow out to the smoke exhaust duct 100 through the outer through opening 20. The smoke flows in the smoke exhaust duct 100 and rushes out from the smoke exhaust opening 42.

[0053] The spiral pot stand 5 blocks the flames from climbing directly upward along the bottom of the pot. By spirally blocking the flames, the crawling speed of the flames is reduced, and the direction of the flames is changed, causing the flames to rise spirally, extending the distance for the flames to crawl from the bottom of the pot to the edge of the pot, prolonging the time for the flames to kiss the bottom of the pot, and improving the thermal efficiency. The spiral pot stand 5 divides the flames into multiple strands from the bottom, and each strand of flames spirally climbs along the fire-extending channel 50 where it is located, evenly kissing the bottom of the pot. At the same time, since the smoke exhaust port 42 is a smoking port, the closer to the smoke exhaust port 42, the greater the suction force. The outer through port 20 and the inner through port 60 are set to be smaller near the smoke exhaust port 42 and larger away from the smoke exhaust port 42. Through the double fire blocking of the fire blocking wall 6 and the furnace stand 2, the crawling speed of the smoke and fire in the fire-extending channel 50 is reduced, so that the fire blocking ability of the fire-extending channel 50 with an outlet closer to the smoke exhaust port 42 is stronger at the outlet, and the smoke and fire passing ability is weaker, forming a situation where the suction of the fire-extending channel 50 near the smoke exhaust port 42 is large and the channel for the smoke and fire to pass through is small, and vice versa, the suction of the fire-extending channel 50 far from the smoke exhaust port 42 is small and the channel for the smoke and fire to pass through is large. Thus, the crawling speed of the smoke and fire in each fire-extending channel 50 is balanced, achieving circular fire extension and uniform fire smoking. The combined action of fire extension and uniform fire improves the thermal efficiency.

[0054] The two spiral fire-extending walls 51 form a double-ring conical thread, each spiraling more than two turns, and the starting pitch of the spiral fire-extending wall 51 is small, and the pitch gradually enlarges outward. In combination with the diffractive fire-extending wall 52, it forms a swirling shape that diverges and radiates outward, making the bottom of the fire-extending channel 50 small and gradually becoming larger upward, so as to carry out sufficient spiral combustion.

[0055] Preferably, the fire pan 7 has a direct-fire flame structure with the fire holes perpendicular to the plane of the fire pan, minimizing the path of the flames ejected from the fire pan 7 to the bottom of the pot and reducing heat loss.

[0056] A plurality of diffractive fire-extending walls 52 are provided between two adjacent spiral fire-extending walls 51, and the plurality of diffractive fire-extending walls 52 are arranged at intervals in a rotating manner from the outer spiral fire-extending wall 51 to the inner spiral fire-extending wall 51.

[0057] The smoke exhaust port 42 is provided at a position corresponding to the outlet of the fire-extending channel 50 formed by the diffractive fire-extending wall 52, avoiding the fire-extending channel 50 corresponding to the spiral fire-extending wall 51. After the smoke and fire in the fire-extending channel 50 corresponding to the spiral fire-extending wall 51 flow into the smoke exhaust duct 100, they rush out from the smoke exhaust port 42 after walking for a certain distance, preventing the smoke exhaust port 42 from being too close to the fire-extending channel 50 corresponding to the spiral fire-extending wall 51, which may cause the suction force of the fire-extending channel 50 corresponding to the spiral fire-extending wall 51 to be too large and quickly suck the flame out of the fire-extending channel 50.

[0058] The spiral fire-extending wall 51 and the diffractive fire-extending wall 52 are respectively perpendicular to the bottom of the pot 10 and fit onto the bottom of the pot, such that the flame can only spiral upward along the corresponding fire-extending channel 50 and then swirl out, avoiding the mutual leakage due to different suction forces of different fire-extending channels 50, which may cause uneven heating. The height of the spiral fire-extending wall 51 and the diffractive fire-extending wall 52 is preferably between 3 cm and 5 cm, so that the fire-extending channel 50 has sufficient height to ensure sufficient combustion and heating, and it is not easy to form the phenomenon of suppressing the fire and blackening the pot; if it is too high, the heating performance will decrease; if it is too low, there will be insufficient space and incomplete combustion.

[0059] The spiral fire-extending wall 51, the diffractive fire-extending wall 52 and the fire-blocking wall 6 are made of cast iron with a thickness of 0.15 cm to 0.2 cm, which can withstand high temperatures and calcination, and has good resistance to deformation. Moreover, the specific heat of cast iron is much smaller than that of water, and the convection and radiation in the closed combustion are very small. A very small part of the heat loss is sufficient to quickly heat the cast iron, and after heating, during the cooking process, under the double heat insulation of the inner furnace and the outer furnace, the heat loss of the heated spiral fire-extending wall 51, diffractive fire-extending wall 52 and fire-blocking wall 6 is small, and the continuous heat absorption during the cooking process is small and the heat loss is small.

[0060] The part of the spiral pot rack 5 located at the position of the fire pan opening 21 is suspended, and is concave upward to form a fire pan groove 53 buckled above the fire pan 7. There is a gap of 0.5 cm to 1.5 cm between the bottom of the fire pan groove 53 and the fire pan 7, avoiding the misfire caused by the spiral pot rack 5.

[0061] A blower 81 is provided in the inner cavity 11 of the base 1. The air outlet of the blower 81 is connected with a shunt 82 for shunting air. The first shunt pipe 83 of the shunt 82 and the gas pipe 85 are connected to the fire pan 7 through a pipeline via an injector 86. The second shunt pipe 84 of the shunt 82 leads to the lower part of the fire pan 7 and blows air towards the fire pan 7. Preferably, a flared mouth 841 is provided at the outlet end of the second shunt pipe 84 of the shunt 82 to evenly blow air towards the fire pan 7. The cross-section of the second shunt pipe 84 is larger than that of the first shunt pipe 83. Preferably, the diameter of the second shunt pipe 84 is 3 to 6 times larger than that of the first shunt pipe 83.

[0062] The injector 86 includes a nozzle 861, a primary air inlet 862, a contraction pipe 863, a mixing pipe 864 and a diffuser pipe 865. The nozzle 861 includes a gas nozzle 866 for connecting with the gas pipe 85 and an air nozzle 867 for connecting with the first shunt pipe 83 of the shunt 82. The air nozzle 867 surrounds the gas nozzle 866 on the outside, and a channel for air flow is formed between the air nozzle 867 and the gas nozzle 866.

[0063] Air and gas are sprayed out through the nozzle 861, and the static air outside is drawn into the ejector 86 for mixing and then flows to the fire pan. The air is supplied through the first shunt pipe 83 of the fan 81 while drawing the outside air, so as to ensure that the mixed gas of the gas has sufficient oxygen for combustion. At the same time, air is blown and supplied through the bell mouth 841 below the fire pan 7, so as to supplement the combustion air and prevent backfire.

[0064] The fan 81 has multiple wind speed adjustment levels and is controlled in conjunction with the firepower adjustment switch 87. By synchronizing the fan 81 speed adjustment switch and the gas firepower adjustment switch, the fan stops corresponding to the gas flameout. When the firepower adjustment switch 87 is started, the gas is turned on and the fan is turned on at the same time. When the firepower of the fire plate is increased, the wind speed of the fan is increased, and when the firepower of the fire plate is decreased, the wind speed of the fan is decreased, so that the size of the air supply can be synchronously adjusted according to the size of the gas supply to achieve the best combustion state.

[0065] The energy-saving stove allows a small amount of air and gas to mix in the ejector 86 as the fire power changes synchronously, and allows most of the air to rush up from the bottom of the fire pan 7, so that the mixed gas of the air and gas can reach a better combustion ratio when burning on the surface of the fire pan, thereby solving the problem of relatively insufficient combustion air compared with closed combustion and atmospheric combustion, and also solving the flashback problem of the blast ejection technology.

[0066] The upward blowing force of the fan 81 from the bell mouth 841 and the suction force during smoking can avoid the phenomenon of flashback and relatively insufficient combustion-supporting air for closed combustion.

[0067] The spiral pot rack 5 is a flat bottom structure for a frying pan, and the flame of the direct fire type fire pan directly shines on the flat bottom of the frying pan, with a simple structure and high heat utilization rate. Preferably, the diameter of the stove mouth 41 is between 30cm and 40cm, and the depth of the bottom of the inner space surrounded by the spiral pot rack 5 is between 8cm and 12cm, that is, the depth for the pot 10 to be placed, the diameter of the fire pan mouth 21 is between 10cm and 15cm, and the outer diameter of the fire pan 7 is between 8cm and 13cm, which is suitable for general household pots. Of course, if the spiral pot rack 5 is set to an arc shape corresponding to a pointed bottom pot, it can be used in conjunction with the pointed bottom pot.

[0068] The outer furnace 102 further includes an insulation layer 103 located below the smoke exhaust duct 100. The insulation layer is filled with perlite. The heat is locked by the insulation layer, and the high-temperature and high-energy flue gas in the smoke exhaust duct 100 surrounds the furnace frame 2, thereby reducing the heat loss of the inner furnace and improving the utilization rate of heat energy.

[0069] Above the smoke exhaust port 42, there is a chimney 9. The chimney 9 is 2 cm to 5 cm away from the stove port 41, which is convenient for placing the pot and making room for the upper edge of the pot. The chimney 9 includes a heat absorption tube 91 whose inner wall can absorb heat. The tube wall of the heat absorption tube 91 has a hollow water cavity 92. On the inner wall of the heat absorption tube 91, there is a heat absorption spiral frame 93 that spirally ascends from the bottom and is used to block the vertical rise of the flue gas and can absorb heat. Specifically, the heat absorption spiral frame 93 is formed by spirally ascending a sheet made of heat absorption material, and its ascending slope is between 25° and 45°. Without affecting the smoke extraction, reducing the spiral ascending slope of the heat absorption spiral frame 93 can delay the speed of the high-temperature waste flue gas passing through the heat absorption spiral frame 93, so that the heat absorption spiral frame 93 can better absorb the heat of the waste flue gas. On the heat absorption tube 91, there is a water inlet 94 for injecting water into the water cavity 92 and a water outlet 95 for discharging the water in the water cavity 92. Outside the heat absorption tube 91, there is a transparent water level tube 96 connected to the water cavity 92 and used to display the water level in the water cavity 92. The outside of the heat absorption tube 91 can be covered with heat insulation material. After the heat absorption spiral frame 93 and the inner wall of the heat absorption tube 91 absorb heat, they heat the water in the water cavity 92. These hot waters can be used for daily use, realizing the recycling of waste heat, saving energy and reducing consumption. Through the heat recovery and utilization of the high-temperature waste gas by the chimney 9, the temperature of the discharged high-temperature waste gas is greatly reduced, and the damage to the range hood caused by the high-temperature waste gas is reduced.

[0070] For double-burner stoves and triple-burner stoves, the smoke exhaust ports 42 on different stoves can be connected to the chimney 9 through the smoke transmission channels, and each smoke transmission channel can be independently opened and closed, so as to close the smoke exhaust ports 42 of the idle stoves when not in use, avoiding affecting the smoke extraction effect of the operating stoves.

[0071] On the outer shell 3 and the furnace frame 2, there are corresponding glass windows 104 for observing the combustion condition of the inner furnace 101.

[0072] This energy-saving stove has a double-layer heat-insulating furnace with an inner furnace and an outer furnace, which greatly reduces the convective radiation of the flames at the bottom of the pot, has the functions of wind prevention, energy storage and heat preservation, solves the hidden danger of pot overflow and flameout, and further prevents the combustion waste gas from diffusing into the kitchen. The annular heat-insulating layer 103 locks most of the heat of the flames at the bottom of the pot, prompting the flames to transfer the heat to the bottom of the pot and the spiral pot rack 5 in close contact with it.

[0073] Such as Figure 3 and Figure 4, the spiral pot rack 5 formed by the double-loop spiral fire-extending wall 51 and the diffraction fire-extending wall 52 is tight inside and loose outside, maximizing the outlet area of the flame at the bottom of the pot, preventing the phenomenon of smothering the fire and blackening the pot. The flame shoots out directly from the fire tray and shoots upward towards the bottom of the pot. The dense spiral pot rack 5 corresponding to the fire tray opening 21 helps the bottom of the pot to absorb. Most of the heat of the flame at the bottom of the pot is locked at the bottom of the pot corresponding to the fire tray opening 21. It also greatly extends the distance of the flame from the middle bottom area of the pot to the edge of the pot. The flame rotates up to more than 900°, and it is not easy to form the phenomenon of smothering the fire and blackening the pot. The spiral pot rack 5 and the annular fire-blocking wall 6 work together to make the flame crawl upward in a decelerated spiral from the bottom of the pot and jump out from the inner notch 61 of the fire-blocking wall 6 and the outer notch 22 of the furnace rack 2, greatly delaying the crawling speed of the flame and increasing the crawling distance of the flame, and greatly improving the heat utilization rate. Since the spiral pot rack 5 is fixed on the furnace rack 2, only by using a matching pot can it have the efficiency-enhancing function of the fins at the bottom of the pot without increasing the weight of the pot itself, remaining as light as before and being convenient to use.

Claims

1. An energy-saving cooker, characterized in that: It includes a base (1). Above the base (1), there is a furnace rack (2) in the shape of a bowl structure. The outer side of the furnace rack (2) is surrounded by a housing (3). Above the furnace rack (2) and the housing (3), there is a cover plate (4). Between the inside of the furnace rack (2) and the cover plate (4), an inner furnace (101) is formed. On the cover plate (4) and inside the furnace rack (2), there is a stove opening (41) for the pot (10) to be placed into the inner furnace (101) and fit with the bottom of the pot. On the furnace rack (2), there is a spiral extended fire wall (51) that spirally ascends from the bottom of the inner furnace (101) to the upper part along the inner wall of the furnace rack (2). There are more than two spiral extended fire walls (51) and they are evenly distributed circumferentially. Between adjacent two spiral extended fire walls (51), there is a diffraction extended fire wall (52) that spirally ascends from the bottom to the upper part along the inner wall of the furnace rack (2). The spiral extended fire wall (51) and the diffraction extended fire wall (52) form a spiral pot rack (5) for supporting the pot (10) and fitting with the bottom of the pot. The diffraction extended fire wall (52) divides the spiral channel between two spiral extended fire walls (51) into multiple spiral ascending extended fire channels (50). On the inner wall of the furnace rack (2) and outside the spiral pot rack (5), there is an annular fire blocking wall (6) for blocking the smoke and fire that spirally rush out from the extended fire channels (50). At the bottom of the furnace rack (2), there is a fire pan opening (21) that penetrates the furnace rack (2) inside and outside. At the fire pan opening (21), there is a fire pan (7). Inside the base (1), there is a cavity (11) that communicates with the fire pan opening (21). At the bottom of the base (1), there is an air channel (12) that connects the cavity (11) with the outside. Between the housing (3), the furnace rack (2) and the cover plate (4), an outer furnace (102) is formed. The outer furnace (102) includes an annular smoke exhaust duct (100) located in the upper part. On the cover plate (4), there is a smoke exhaust opening (42) corresponding to the smoke exhaust duct (100). Above the smoke exhaust opening (42), there is a chimney (9). At the top of the furnace rack (2), there is an outer notch (22) that gradually becomes larger from the near side to the far side of the smoke exhaust opening (42). Between the furnace rack (2) and the cover plate (4) at the outer notch (22), an outer passage opening (20) that is small near the smoke exhaust opening (42) and large far from the smoke exhaust opening (42) is formed. At the top of the fire blocking wall (6), there is an inner notch (61) that gradually becomes larger from the near side to the far side of the smoke exhaust opening (42). Between the fire blocking wall (6) and the bottom of the pot, an inner passage opening (60) that is small near the smoke exhaust opening (42) and large far from the smoke exhaust opening (42) is formed at the inner notch (61); Between adjacent two spiral extended fire walls (51), there are multiple diffraction extended fire walls (52). The multiple diffraction extended fire walls (52) are arranged in a rotating and spaced manner in sequence from the outer spiral extended fire wall (51) to the inner spiral extended fire wall (51); The spiral extended fire wall (51) and the diffraction extended fire wall (52) are respectively perpendicular to the bottom of the pot (10) and fit on the bottom of the pot.

2. The energy-saving cooker according to claim 1, wherein: The smoke outlet (42) is arranged at a position corresponding to the outlet of the fire-extending channel (50) formed by the diffraction fire-extending wall (52).

3. An energy-saving cooker according to claim 1 or 2, characterized in that: The part of the spiral pot rack (5) located at the position of the fire pan opening (21) is suspended, and is concave upward to form a fire pan groove (53) buckled above the fire pan (7). There is a gap of 0.5 cm to 1.5 cm between the bottom of the fire pan groove (53) and the fire pan (7).

4. An energy-saving cooking stove according to claim 1 or 2, characterized in that: A blower (81) is arranged in the inner cavity (11) on the base (1). A flow divider (82) for splitting air is connected to the air outlet of the blower (81). The first flow dividing pipe (83) of the flow divider (82) and the gas pipe (85) are connected to the fire pan (7) through a pipeline via an ejector (86). The second flow dividing pipe (84) of the flow divider (82) extends to the lower part of the fire pan (7) and blows air towards the fire pan (7). The cross section of the second flow dividing pipe (84) is larger than that of the first flow dividing pipe (83).

5. An energy-saving cooker according to claim 1 or 2, characterized in that: The spiral pot rack (5) has a flat structure for use with a flat pan.

6. An energy-saving cooker according to claim 1 or 2, characterized in that: The fire pan (7) has a structure of direct-fire flame with the fire holes perpendicular to the fire pan plane.

7. An energy-saving cooker according to claim 1 or 2, characterized in that: The outer furnace (102) further includes a heat insulation layer (103) located below the smoke exhaust duct (100).

8. An energy-saving cooker according to claim 1 or 2, characterized in that: The chimney (9) includes a heat-absorbing pipe (91) whose inner wall can absorb heat. The pipe wall of the heat-absorbing pipe (91) has a hollow water cavity (92). A heat-absorbing spiral rack (93) that can absorb heat and spirally ascends from the bottom and is used to block the vertical rise of the flue gas is arranged on the inner wall of the heat-absorbing pipe (91). An inlet (94) for injecting water into the water cavity (92) and an outlet (95) for discharging the water in the water cavity (92) are arranged on the heat-absorbing pipe (91).

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