Multi-stage heat cycle energy-saving baking oven

Abstract

The invention relates to the technical field of baking ovens, in particular to a multistage heat circulation energy-saving baking oven which comprises a baking oven body, a heat collection curved pipe and an adjustable waste heat circulation assembly, an electric heating pipe is arranged in the baking oven body, and auxiliary electric heating wires are arranged on the two sides of the inner wall of the baking oven body; the baking oven comprises a baking oven body, a sealing door is hinged to the side end face of the baking oven body, a hot air flow channel is formed in the side end of the baking oven body, a hot air drainage assembly is arranged in the top end of the baking oven body, and an adjustable waste heat circulation assembly is arranged in the side end of the baking oven body. Through a heat collection circulation structure composed of the heat collection curved pipes, the graphene heat conduction blocks, the heat collection copper sheets and the like, the characteristic of high specific heat capacity of water is utilized, waste heat in the baking process is collected, water is recycled through the first heat release pipe and the second heat release pipe, and the overall heat loss of the baking oven body can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of baking ovens, in particular to a multi-stage heat circulation energy-saving baking oven. Background Art

[0002] A baking oven is a device used for baking food. It is generally made of metal materials such as cold-rolled steel plates or stainless steel. It can be used to make various breads, such as staple bread, sweet bread, and seasoned bread. During use, by controlling the baking temperature and time, a golden crust is formed on the surface of the bread, and the internal structure is soft and fluffy. It can also be used to bake foods such as egg tarts, pizza, roast chicken, roast duck, and can even be used to dry some dry goods, such as dried fruit slices and Chinese medicinal materials.

[0003] Existing baking ovens mostly consist of an insulated heating box with a quartz heating tube installed inside to heat the air inside the box, and use the hot air to exchange heat with the food to bake the food. Although it can meet the baking needs of most households or businesses, it has some disadvantages in actual use. Although the temperature of the hot air inside the baking box drops after the heat exchange with the food, it still contains a large amount of heat energy. The residual heat will be dissipated into the surrounding environment through the gaps in the box or the exhaust holes, resulting in energy waste. In order to reach the set baking temperature, the heating element needs to be started frequently and work for a long time, which not only increases energy consumption, but also causes uneven internal heat distribution, thereby affecting the consistency of food baking. In winter, when the ambient temperature is low, the heat in the box dissipates faster, and more energy is needed to maintain the set temperature. In summer, when the ambient temperature is high, the temperature in the box may be too high due to poor heat dissipation, making it difficult to accurately control the baking temperature.

[0004] Therefore, in order to solve the problem that a large amount of waste heat contained in the baking oven after the hot air and food exchange heat cannot be reused, resulting in energy waste, and the heating elements need to be frequently started to maintain the set temperature, which greatly increases energy consumption and causes uneven heat distribution in the oven, seriously affecting the consistency of food baking, a multi-stage thermal circulation energy-saving baking oven was proposed. Summary of the Invention

[0005] The present invention aims to provide an energy-saving multi-stage heat circulation baking oven. This solves the problem that after the hot air inside the baking oven exchanges heat with the food, a large amount of waste heat is contained and cannot be reused, resulting in energy waste. At the same time, to maintain the set temperature, the heating elements need to be frequently activated, which greatly increases energy consumption and causes uneven heat distribution in the oven, seriously affecting the consistency of food baking.

[0006] The technical solution of the present invention is: a multi-stage heat circulation energy-saving baking oven, comprising a baking oven body, a heat collecting curved tube and an adjustable waste heat circulation component, wherein an electric heating tube is arranged inside the baking oven body, auxiliary electric heating wires are arranged on both sides of the inner wall of the baking oven body, a closed door is hingedly connected to the side end surface of the baking oven body, a hot air flow channel is opened inside the side end of the baking oven body, a hot air deflection component is arranged inside the top end of the baking oven body, an adjustable waste heat circulation component is arranged inside the side end of the baking oven body, a protective mesh plate is fixed to the top end of the inner wall of the baking oven body by bolts, a heat collecting cavity is opened inside the top end of the baking oven body, a heat conducting orifice plate is arranged on the inner wall of the bottom end of the heat collecting cavity, the heat conducting orifice plate is arranged directly above the protective mesh plate, a graphene heat conducting block is mounted on the upper end of the heat conducting orifice plate, and the heat collecting curved tube is mounted on the upper end of the graphene heat conducting block.

[0007] Preferably, the outer portion of the heat collecting curved tube is sheathed with a heat collecting copper sheet, an insulating cavity is opened inside the back end of the baking oven body, the return water inlet pipe of the heat collecting curved tube is connected to the water inlet end of the reflux pump, the water outlet pipe of the reflux pump is connected to the first heat release pipe, the back end of the baking oven body is fixed to the outside of the back heat insulation board by bolts, a water storage tank is installed on the outer side of the back heat insulation board, the end pipe of the first heat release pipe is connected to the inside of the water storage tank, a booster pump is installed at the bottom end of the water storage tank, the water inlet pipe of the booster pump extends to the inside of the water storage tank, the water outlet pipe of the booster pump is connected to the second heat release pipe, the second heat release pipe, the reflux pump and the first heat release pipe are all arranged inside the insulating cavity, the end pipe of the second heat release pipe is connected to the water inlet of the heat collecting curved tube, and the upper end of the water storage tank is provided with a water inlet and a steam pressure relief valve.

[0008] Preferably, a slide tray is fixedly connected to the inner wall of the baking box body, and a hollow heat-conducting baking tray is slidably connected to the interior of the slide tray. A blower fan is provided inside the baking box body, and the blower fan is provided below the electric heating tube. The wind direction of the blower fan is from bottom to top. A lower hot air return port is provided on the inner wall of the baking box body, and an exhaust fan is provided inside the lower hot air return port. The wind direction of the exhaust fan is from left to right. A receiving slot is provided inside the bottom end of the baking box body, and an oil collecting pan is slidably connected to the interior of the receiving slot.

[0009] Preferably, the hot air deflection assembly includes an air inlet, a deflection fan, a fixed frame plate, a dust screen, an upper hot air return port, a top heat insulation cover, a heat dissipation frame tube, a conical air outlet guide frame plate, a rotating motor, an adjustment roller, a ventilation slot and a heat dissipation fan. An air inlet is provided on the side end surface of the baking oven body, and a deflection fan is provided inside the air inlet. The wind direction of the deflection fan is from right to left. A fixed frame plate is installed on the side end surface of the baking oven body, and the fixed frame plate is provided on the outside of the deflection fan. A dust screen is provided on the inside of the fixed frame plate.

[0010] Preferably, an upper hot air return port is provided on the inner wall of the heat collection cavity, and the upper hot air return port is communicated with the hot air flow channel. A top heat insulation cover is fixed to the top of the baking oven body by bolts, and a heat dissipation frame tube is installed on the upper end of the top heat insulation cover. A conical air outlet guide frame plate is provided inside the heat dissipation frame tube, and the heat dissipation frame tube and the conical air outlet guide frame plate are arranged above the hot air flow channel.

[0011] Preferably, a rotating motor is installed at the side end of the heat dissipation frame tube, the output shaft of the rotating motor passes through the heat dissipation frame tube and is connected to the central axis of the adjusting roller shaft, a ventilation slot is opened inside the adjusting roller shaft, and a heat dissipation fan is arranged above the heat dissipation frame tube, and the wind direction of the heat dissipation fan is from bottom to top.

[0012] Preferably, the adjustable waste heat circulation assembly includes a side heat insulation plate, an elastic closed adjustment plate, a receiving groove, a tension spring, a first mounting groove, a limiting ring, a fixed pulley support rod, a limiting pulley support rod, a second mounting groove, a winding roller, a traction rope, a hook, a U-shaped block and a micro motor. The side end portion of the baking box body is fixed with the side heat insulation plate by bolts, and the outer end of the side heat insulation plate is installed with a micro motor.

[0013] Preferably, an elastic closed adjustment plate is hinged on the inner wall of the hot air flow channel, a receiving groove is provided at a side end of the inner wall of the hot air flow channel, and a tension spring is hinged inside the receiving groove.

[0014] Preferably, the side end of the tension spring is hinged to the outer end of the elastic closed adjustment plate, the side end of the baking box body is provided with a first mounting groove, the inner wall of the first mounting groove is fixedly connected to a limiting ring, the inner wall of the first mounting groove is provided with a fixed pulley support rod, the inner wall of the first mounting groove is provided with a limiting pulley support rod, and the fixed pulley support rod and the limiting pulley support rod are symmetrically arranged up and down.

[0015] Preferably, a second mounting groove is provided at the side end portion of the baking box body, a winding roller is rotatably connected inside the second mounting groove, the output shaft of the micro motor passes through the side heat insulation plate and is fixed to the central axis of the winding roller, a traction rope is provided on the outside of the winding roller, one end of the traction rope is fixed to the outside of the winding roller, and the other end of the traction rope is connected to a hook through a limiting ring and a fixed pulley support rod, a U-shaped block is provided on the inner side of the elastic closed adjustment plate, and the hook is hinged to the inner side of the U-shaped block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The heat collection circulation structure, consisting of a heat collection curved tube, graphene heat conductive blocks, and heat collection copper sheets, utilizes the high specific heat capacity of water to collect waste heat from the baking process and recycle it through the first and second heat release tubes. The first and second heat release tubes are installed in the heat-insulating cavity on the back of the baking box body to surround the heat, which can reduce heat loss in the baking box body, improve energy utilization, and shorten baking time.

[0018] 2. The electric heating tube and the auxiliary electric heating wire can be used for synergistic heating, and the blower fan can be used to promote the circulation of hot air from bottom to top, so that the temperature inside the baking box is evenly distributed. The drainage fan, rotating motor, adjusting roller and cooling fan in the hot air drainage assembly can accurately adjust the temperature and airflow inside the box. When the temperature inside the box is too high, the adjusting roller is rotated so that the ventilation slot inside it is perpendicular to the opening above the hot air flow channel. The cooling fan is used to take away the heat inside the baking box body. After the heat drops, the adjusting roller is rotated to stagger the ventilation slot and the hot air flow channel, which plays the role of sealing the upper opening of the hot air flow channel and reducing heat loss.

[0019] 3. The winding roller is driven by a micro motor, the traction rope is retracted and released, and the angle of the elastic closed adjustment plate is flexibly adjusted to achieve precise control of the hot air flow and circulation path. After baking is completed, the entire hot air flow channel can be completely closed to end the heat circulation. Then the cooling fan in the heat dissipation frame and the drainage fan in the air inlet form an air circulation path to accelerate the dissipation of heat in the baking box body. The heat dissipation and airflow can be flexibly adjusted. When the elastic closed adjustment plate is opened, the hot air can pass through the hot air flow channel and finally be discharged from the lower hot air return port. The exhaust fan is then used to push the recovered hot air upward, and it is heated again by the electric heating tube and discharged to the items in the box.

[0020] 4. The slide tray inside the baking oven body is slidably connected to the hollow heat-conducting baking tray, making it convenient for users to place and remove baked items and easy to operate. The dust screen on the inside of the fixed frame can effectively filter external air and prevent dust from entering the oven, ensuring a clean baking environment and improving food hygiene and safety. The design of the insulation cavity, back insulation board, top insulation cover and side insulation boards reduces heat loss to the outside, which not only improves the thermal insulation performance, but also avoids accidental burns to the operator and enhances safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the hollow heat-conducting baking tray of the present invention;

[0023] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the blower fan of the present invention;

[0024] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the oil collecting pan of the present invention;

[0025] Figure 5 Shown is a schematic diagram of the three-dimensional structure of the protective screen of the present invention;

[0026] Figure 6 Shown is a schematic diagram of the three-dimensional structure of the heat conduction hole plate of the present invention;

[0027] Figure 7 Shown is a schematic diagram of the three-dimensional structure of the first heat release tube of the present invention;

[0028] Figure 8 Shown is a schematic diagram of the three-dimensional structure of the booster pump of the present invention;

[0029] Figure 9 Shown is a schematic diagram of the three-dimensional structure of the hot air flow channel of the present invention;

[0030] Figure 10 Shown is a schematic diagram of the three-dimensional structure of the adjustment roller shaft of the present invention;

[0031] Figure 11 Shown is a schematic diagram of the three-dimensional structure of the elastic closed adjustment plate of the present invention;

[0032] Figure 12 Shown is a schematic diagram of the three-dimensional structure of the tension spring of the present invention;

[0033] Figure 13 The present invention is shown Figure 12 Enlarged schematic diagram of the three-dimensional structure at point A in the middle.

[0034] Explanation of reference numerals: 1. baking oven body; 2. electric heating tube; 3. auxiliary electric heating wire; 4. closing door; 5. chute support plate; 6. hollow heat-conducting baking tray; 7. blower fan; 8. lower hot air return port; 9. exhaust fan; 10. receiving slot; 11. oil collecting tray; 101. protective mesh plate; 102. heat collecting cavity; 103. heat-conducting hole plate; 104. graphene heat-conducting block; 105. heat-collecting curved tube; 106. heat-collecting copper sheet; 107. reflux pump; 108. first heat-dissipating tube; 109. back heat insulation board; 110. water storage tank; 111. booster pump; 112. second heat-dissipating tube; 113. water inlet; 114. steam pressure relief valve; 201. air inlet; 202. drainage fan; 203. Fixed frame plate; 204. Dust screen; 205. Upper hot air return port; 206. Hot air flow channel; 207. Top insulation cover; 208. Heat dissipation frame tube; 209. Conical air outlet guide frame plate; 210. Rotating motor; 211. Adjusting roller; 212. Ventilation slot; 213. Cooling fan; 301. Side insulation plate; 302. Elastic closed adjustment plate; 303. Accommodating slot; 304. Tension spring; 305. First mounting groove; 306. Limiting ring; 307. Fixed pulley support rod; 308. Limiting pulley support rod; 309. Second mounting groove; 310. Winding roller; 311. Traction rope; 312. Hook; 313. U-shaped block; 314. Micro motor. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-13The present invention provides an embodiment: a multi-stage heat circulation energy-saving baking oven, comprising a baking oven body 1, a heat collecting curved tube 105 and an adjustable waste heat circulation component, wherein an electric heating tube 2 is provided inside the baking oven body 1, auxiliary electric heating wires 3 are provided on both sides of the inner wall of the baking oven body 1, a closed door 4 is hingedly connected to the side end surface of the baking oven body 1, a hot air flow channel 206 is opened inside the side end of the baking oven body 1, a hot air deflection component is provided inside the top end of the baking oven body 1, and an adjustable waste heat circulation component is provided inside the side end of the baking oven body 1. A protective mesh plate 101 is fixed to the top of the inner wall of the baking oven body 1 by bolts. A heat collecting cavity 102 is defined inside the top of the baking oven body 1. A heat conducting orifice plate 103 is provided on the inner wall of the bottom end of the heat collecting cavity 102. The heat conducting orifice plate 103 is disposed directly above the protective mesh plate 101. A graphene heat conducting block 104 is mounted on the upper end of the heat conducting orifice plate 103. A heat collecting curved tube 105 is mounted on the upper end of the graphene heat conducting block 104. The heat in the baking oven body 1 is transferred to the heat collecting curved tube 105 through the protective mesh plate 101, the heat conducting orifice plate 103, and the graphene heat conducting block 104.

[0037] The outer portion of the heat collecting curved tube 105 is sheathed with a heat collecting copper sheet 106. An insulating cavity is provided inside the back end of the baking oven body 1. The return pipe of the heat collecting curved tube 105 is connected to the water inlet of a reflux pump 107. The water outlet pipe of the reflux pump 107 is connected to the first heat releasing pipe 108. A back heat insulating plate 109 is fixed to the outside of the back end of the baking oven body 1 by bolts. A water storage tank 110 is installed on the outside of the back heat insulating plate 109. The end pipe of the first heat releasing pipe 108 is connected to the interior of the water storage tank 110. A booster pump 111 is installed at the bottom end of the water storage tank 110. The water inlet pipe of the booster pump 111 extends into the interior of the water storage tank 110. The water outlet pipe of the booster pump 111 The pipeline is connected to a second heat release pipe 112. The second heat release pipe 112, the reflux pump 107 and the first heat release pipe 108 are all arranged inside the heat-insulating cavity. The end pipe of the second heat release pipe 112 is connected to the water inlet of the heat collecting curved pipe 105. The upper end of the water storage tank 110 is provided with a water injection port 113 and a steam pressure relief valve 114. The heat collecting copper sheet 106 outside the heat collecting curved pipe 105 enhances the heat collection effect. The reflux pump 107 extracts the hot water in the heat collecting curved pipe 105 and transports it to the water storage tank 110 through the first heat release pipe 108. The booster pump 111 then sends the water in the water storage tank 110 back to the heat collecting curved pipe 105 through the second heat release pipe 112, forming a hot water circulation.

[0038] A chute support plate 5 is fixedly connected to the inner wall of the baking box body 1, and a hollow heat-conducting baking tray 6 is slidably connected to the interior of the chute support plate 5. A blower fan 7 is provided inside the baking box body 1, and the blower fan 7 is arranged below the electric heating tube 2. The wind direction of the blower fan 7 is from bottom to top. A lower hot air return port 8 is opened on the inner wall of the baking box body 1, and an exhaust fan 9 is arranged inside the lower hot air return port 8. The wind direction of the exhaust fan 9 is from left to right. A receiving slot 10 is opened inside the bottom end of the baking box body 1, and an oil collecting pan 11 is slidably connected to the interior of the receiving slot 10. The blower fan 7 makes the hot air flow from bottom to top in the box, so that the heat is evenly distributed in the box, and the items on the hollow heat-conducting baking tray 6 are baked.

[0039] The hot air deflection assembly includes an air inlet 201, a deflection fan 202, a fixed frame plate 203, a dust screen 204, an upper hot air return port 205, a top heat insulation cover 207, a heat dissipation frame tube 208, a conical air outlet guide frame plate 209, a rotating motor 210, an adjusting roller 211, a ventilation slot 212 and a heat dissipation fan 213. The side end surface of the baking oven body 1 is provided with an air inlet 201, and a deflection fan 202 is arranged inside the air inlet 201. The wind direction of the deflection fan 202 is from right to left. The side end surface of the baking oven body 1 is installed with a fixed frame plate 203, which is arranged on the outside of the deflection fan 202. A dust screen 204 is arranged on the inside of the fixed frame plate 203. The fixed frame plate 203 is installed on the outside of the air inlet 201. The dust screen 204 inside the fixed frame plate 203 can filter external air to prevent dust and other impurities from entering the box, thereby ensuring a clean baking environment.

[0040] An upper hot air return port 205 is provided on the inner wall of the heat collection cavity 102, and the upper hot air return port 205 is communicated with the hot air flow channel 206. A top heat insulation cover 207 is fixed to the top of the baking oven body 1 by bolts. A heat dissipation frame tube 208 is installed on the upper end of the top heat insulation cover 207. A conical air outlet guide frame plate 209 is provided inside the heat dissipation frame tube 208. The heat dissipation frame tube 208 and the conical air outlet guide frame plate 209 are arranged above the hot air flow channel 206. The heat collection cavity 102 is communicated with the hot air flow channel 206 through the upper hot air return port 205, and the hot air in the heat collection cavity 102 is introduced into the hot air flow channel 206. The top heat insulation cover 207 is installed on the top of the baking oven body 1 to insulate the heat collection cavity 102 and reduce heat loss.

[0041] A rotating motor 210 is installed at the side end of the heat dissipation frame 208. The output shaft of the rotating motor 210 passes through the heat dissipation frame 208 and is connected to the central axis of the adjusting roller 211. A ventilation slot 212 is provided inside the adjusting roller 211. A heat dissipation fan 213 is provided above the heat dissipation frame 208. The wind direction of the heat dissipation fan 213 is from bottom to top. After the adjusting roller 211 rotates, the outflow of hot air in the box is changed or closed by whether the internal ventilation slot 212 is vertically aligned with the opening above the hot air flow channel 206. The heat dissipation fan 213 is installed above the heat dissipation frame 208, and the wind direction is from bottom to top, which assists in the discharge of hot air.

[0042] The adjustable waste heat circulation assembly includes a side heat insulation plate 301, an elastic closed adjustment plate 302, a receiving groove 303, a tension spring 304, a first mounting groove 305, a limiting ring 306, a fixed pulley support rod 307, a limiting pulley support rod 308, a second mounting groove 309, a winding roller 310, a traction rope 311, a hook 312, a U-shaped block 313, and a micro motor 314. The side end of the baking oven body 1 is fixed with the side heat insulation plate 301 by bolts, and the outer end of the side heat insulation plate 301 is installed with a micro motor 314. The side heat insulation plate 301 can prevent heat dissipation from the side end of the baking oven body 1.

[0043] The inner wall of the hot air flow channel 206 is hinged with an elastic closed adjustment plate 302, and the side end of the inner wall of the hot air flow channel 206 is provided with a receiving groove 303. The interior of the receiving groove 303 is hinged with a tension spring 304. The tension spring 304 can be reset after the elastic closed adjustment plate 302 is pulled out to maintain the permeability of the hot air flow channel 206.

[0044] The side end of the tension spring 304 is hinged to the outer end of the elastic closed adjustment plate 302, and a first mounting groove 305 is formed at the side end of the baking box body 1. A limiting ring 306 is fixedly connected to the inner wall of the first mounting groove 305, and a fixed pulley support rod 307 is installed on the inner wall of the first mounting groove 305. A limiting pulley support rod 308 is installed on the inner wall of the first mounting groove 305. The fixed pulley support rod 307 and the limiting pulley support rod 308 are arranged symmetrically up and down. The limiting ring 306, the fixed pulley support rod 307 and the limiting pulley support rod 308 can make the moving trajectory of the traction rope 311 more stable.

[0045] A second mounting groove 309 is provided at the side end of the baking oven body 1. A winding roller 310 is rotatably connected to the interior of the second mounting groove 309. The output shaft of the micro motor 314 passes through the side heat insulation plate 301 and is fixed to the central axis of the winding roller 310. A traction rope 311 is provided on the outside of the winding roller 310. One end of the traction rope 311 is fixed to the outside of the winding roller 310. The other end of the traction rope 311 passes through the limit ring 306 and the fixed pulley support rod 307 and is connected to a hook 312, which is elastically closed. A U-shaped block 313 is provided on the inner side of the adjustment plate 302, and the hook 312 is hinged to the inner side of the U-shaped block 313. When the winding roller 310 reels in the traction rope 311, the elastic closed adjustment plate 302 is pulled to rotate around the hinge point, and the hot air flow channel 206 is closed at this time; when the winding roller 310 releases the traction rope 311, the tension spring 304 is hinged between the accommodating groove 303 and the elastic closed adjustment plate 302, and pulls the elastic closed adjustment plate 302 back by its own elasticity, and the hot air flow channel 206 is opened at this time.

[0046] Working principle: According to Figures 1-4 First, the baking oven body 1 is turned on to allow the internal electric heating tube 2 to start working and generate heat as the main heat source. Auxiliary electric heating wires 3 are distributed on both sides of the inner wall of the baking oven body 1 to help increase the temperature inside the oven. The two work together to quickly increase the temperature inside the oven. The blower fan 7 is arranged below the electric heating tube 2. When turned on, it blows the heat generated by the electric heating tube 2 from bottom to top, prompting hot air to flow in the baking oven, so that the heat can be evenly transferred to the baked items placed on the hollow heat-conducting baking tray 6 to ensure uniform baking. The hollow heat-conducting baking tray 6 can slide in the slide tray 5 to facilitate the placement and removal of baked items.

[0047] according to Figure 5-Figure 8 Heat within the baking oven body 1 is conducted through the protective mesh 101, via the thermally conductive orifice plate 103, to the graphene heat conducting block 104. The graphene heat conducting block 104, with its excellent thermal conductivity, quickly transfers the heat to the heat collecting curved tube 105. The heat collecting copper sheet 106 sheathed around the outer surface of the heat collecting curved tube 105 further enhances the heat collection effect and absorbs the excess heat within the oven. A reflux pump 107 extracts the heated water from the heat collecting curved tube 105 and delivers it to the water storage tank 110 through the first heat release pipe 108. A booster pump 111 pressurizes the water in the water storage tank 110 and returns it to the water inlet of the heat collecting curved tube 105 through the second heat release pipe 112. This forms a complete hot water circulation structure, maintaining the surrounding temperature at the back of the baking oven body 1 and recycling the excess heat within the oven. A water inlet 113 at the top of the water storage tank 110 is used to replenish the water level. A steam pressure relief valve 114 prevents safety issues caused by excessive pressure.

[0048] according to Figure 5 and Figure 9-10The exhaust fan 202 is installed in the air inlet 201, and the wind direction is from right to left. After starting, it introduces external air into the baking box body 1, mixes with the hot air in the box, and adjusts the air composition and temperature in the box. The fixed frame 203 is installed on the outside of the air inlet 201. The dust screen 204 inside it can filter the external air to prevent dust and other impurities from entering the baking box, ensuring a clean baking environment. The heat collection cavity 102 at the top of the inner wall of the baking box body 1 is connected to the hot air flow channel 206 through the upper hot air return port 205. The hot air in the heat collecting cavity 102 is introduced into the hot air flow channel 206 by the exhaust fan 9. When the temperature inside the oven is too high, the adjusting roller 211 is rotated so that the ventilation slot 212 inside it is perpendicular to the upper opening of the hot air flow channel 206. The heat inside the baking oven body 1 is removed by the heat dissipation fan 213. After the temperature drops, the adjusting roller 211 is rotated so that the ventilation slot 212 is staggered with the hot air flow channel 206, thereby sealing the upper opening of the hot air flow channel 206 and reducing heat loss.

[0049] according to Figure 11-13 The micro motor 314 drives the winding roller 310, retracts and releases the traction rope 311, and flexibly adjusts the angle of the elastic closed adjustment plate 302 to achieve precise control of the hot air flow and circulation path. After baking is completed, the entire hot air flow channel 206 can be completely closed to end the heat circulation. Then, the heat dissipation fan 213 in the heat dissipation frame 208 and the suction fan 202 in the air inlet 201 form an air circulation path to accelerate the heat dissipation in the baking box body 1. The heat dissipation and airflow can be flexibly adjusted. The tension spring 304 is hinged between the receiving groove 303 and the elastic closed adjustment plate 302, and pulls the elastic closed adjustment plate 302 back by its own elasticity. At this time, the hot air flow channel 206 is opened, and the hot air can pass through the hot air flow channel 206 and finally be discharged from the lower hot air return port 8. The exhaust fan 9 then pushes the recovered hot air upward and is heated again by the electric heating tube 2 and then discharged to the items in the box.

[0050] It is noted here that the above-mentioned electric heating tube 2, auxiliary electric heating wire 3, blower fan 7, exhaust fan 9, reflux pump 107, booster pump 111, drainage fan 202, rotating motor 210, cooling fan 213 and micro motor 314 can be powered by existing operating technical means, whether using power supply components or external wires for power supply, which are all existing conventional operating technical means and will not be described in detail here.

[0051] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage heat circulation energy-saving baking oven, comprising a baking oven body (1); characterized in that: The invention also includes a heat collecting curved tube (105) and an adjustable waste heat circulation component. An electric heating tube (2) is provided inside the baking box body (1). Auxiliary electric heating wires (3) are provided on both sides of the inner wall of the baking box body (1). A closed door (4) is hingedly connected to the side end face of the baking box body (1). A hot air flow channel (206) is provided inside the side end of the baking box body (1). A hot air drainage component is provided inside the top end of the baking box body (1). An adjustable waste heat circulation component is provided inside the side end of the baking box body (1). The invention relates to a component, wherein a protective mesh plate (101) is fixed to the top of the inner wall of the baking box body (1) by bolts, a heat collecting cavity (102) is opened inside the top of the baking box body (1), a heat conducting hole plate (103) is provided on the inner wall of the bottom end of the heat collecting cavity (102), the heat conducting hole plate (103) is arranged directly above the protective mesh plate (101), a graphene heat conducting block (104) is installed on the upper end of the heat conducting hole plate (103), and a heat collecting curved tube (105) is installed on the upper end of the graphene heat conducting block (104).

2. The multi-stage heat circulation energy-saving baking oven according to claim 1, characterized in that: The outer portion of the heat collecting curved tube (105) is sheathed with a heat collecting copper sheet (106); a heat insulating cavity is provided inside the back end of the baking box body (1); a return pipe of the heat collecting curved tube (105) is connected to the water inlet of a reflux pump (107); a water outlet pipe of the reflux pump (107) is connected to a first heat releasing pipe (108); a back heat insulating plate (109) is fixed to the outside of the back end of the baking box body (1) by bolts; a water storage tank (110) is installed outside the back heat insulating plate (109); and a terminal pipe of the first heat releasing pipe (108) is connected to the water storage tank (110). Inside, a booster pump (111) is installed at the bottom end of the water storage tank (110), and the water inlet pipe of the booster pump (111) extends into the water storage tank (110). The water outlet pipe of the booster pump (111) is connected to a second heat release pipe (112). The second heat release pipe (112), the reflux pump (107) and the first heat release pipe (108) are all arranged inside the heat-insulating cavity. The end pipe of the second heat release pipe (112) is connected to the water inlet of the heat-collecting curved pipe (105). The upper end of the water storage tank (110) is provided with a water injection port (113) and a steam pressure relief valve (114).

3. The multi-stage heat circulation energy-saving baking oven according to claim 1, characterized in that: The inner wall of the baking box body (1) is fixedly connected with a slide support plate (5), and the interior of the slide support plate (5) is slidably connected with a hollow heat-conducting baking tray (6). The interior of the baking box body (1) is provided with a blower fan (7), and the blower fan (7) is arranged below the electric heating tube (2). The wind direction of the blower fan (7) is from bottom to top. The inner wall of the baking box body (1) is provided with a lower hot air return port (8), and the interior of the lower hot air return port (8) is provided with an exhaust fan (9), and the wind direction of the exhaust fan (9) is from left to right. The bottom end of the baking box body (1) is provided with a receiving slot (10), and the interior of the receiving slot (10) is slidably connected with an oil collecting pan (11).

4. The multi-stage heat circulation energy-saving baking oven according to claim 1, characterized in that: The hot air deflection assembly comprises an air inlet (201), a deflection fan (202), a fixed frame plate (203), a dust screen (204), an upper hot air return port (205), a top heat insulation cover (207), a heat dissipation frame tube (208), a conical air outlet guide frame plate (209), a rotating motor (210), an adjusting roller shaft (211), a ventilation slot (212) and a heat dissipation fan (213). The side end surface of the baking box body (1) is provided with an air inlet (201), the interior of the air inlet (201) is provided with a deflection fan (202), and the wind direction of the deflection fan (202) is from right to left. The side end surface of the baking box body (1) is provided with a fixed frame plate (203), the fixed frame plate (203) is provided on the outside of the deflection fan (202), and the inside of the fixed frame plate (203) is provided with a dust screen (204).

5. The multi-stage heat circulation energy-saving baking oven according to claim 4, characterized in that: The inner wall of the heat collecting cavity (102) is provided with an upper hot air return port (205), and the upper hot air return port (205) is communicated with the hot air flow channel (206). The top end of the baking box body (1) is fixed with a top heat insulation cover (207) by bolts, and the upper end of the top heat insulation cover (207) is installed with a heat dissipation frame tube (208), and the interior of the heat dissipation frame tube (208) is provided with a conical air outlet guide frame plate (209). The heat dissipation frame tube (208) and the conical air outlet guide frame plate (209) are arranged above the hot air flow channel (206).

6. The multi-stage heat circulation energy-saving baking oven according to claim 4, characterized in that: A rotating motor (210) is installed at the side end of the heat dissipation frame tube (208); the output shaft of the rotating motor (210) passes through the heat dissipation frame tube (208) and is connected to the central axis of the adjusting roller shaft (211); a ventilation slot (212) is provided inside the adjusting roller shaft (211); a heat dissipation fan (213) is provided above the heat dissipation frame tube (208); and the wind direction of the heat dissipation fan (213) is from bottom to top.

7. The multi-stage heat circulation energy-saving baking oven according to claim 1, characterized in that: The adjustable waste heat circulation assembly comprises a side heat insulation plate (301), an elastic closed adjustment plate (302), a receiving groove (303), a tension spring (304), a first installation groove (305), a limiting ring (306), a fixed pulley support rod (307), a limiting pulley support rod (308), a second installation groove (309), a winding roller (310), a traction rope (311), a hook (312), a U-shaped block (313) and a micro motor (314). The side end of the baking box body (1) is fixed with the side heat insulation plate (301) by bolts, and the outer end of the side heat insulation plate (301) is installed with the micro motor (314).

8. The multi-stage heat circulation energy-saving baking oven according to claim 7, characterized in that: An elastic closed adjustment plate (302) is hinged on the inner wall of the hot air flow channel (206), a receiving groove (303) is provided at the side end of the inner wall of the hot air flow channel (206), and a tension spring (304) is hinged inside the receiving groove (303).

9. The multi-stage heat circulation energy-saving baking oven according to claim 7, characterized in that: The side end of the tension spring (304) is hinged to the outer end of the elastic closed adjustment plate (302), and the side end of the baking box body (1) is provided with a first installation groove (305), the inner wall of the first installation groove (305) is fixedly connected to a limiting ring (306), the inner wall of the first installation groove (305) is installed with a fixed pulley support rod (307), and the inner wall of the first installation groove (305) is installed with a limiting pulley support rod (308), and the fixed pulley support rod (307) and the limiting pulley support rod (308) are symmetrically arranged up and down.

10. The multi-stage heat circulation energy-saving baking oven according to claim 7, characterized in that: A second mounting groove (309) is provided at the side end portion of the baking box body (1), and a winding roller (310) is rotatably connected inside the second mounting groove (309). The output shaft of the micro motor (314) passes through the side heat insulation plate (301) and is fixed to the central axis of the winding roller (310). A traction rope (311) is provided on the outside of the winding roller (310), one end of the traction rope (311) is fixed to the outside of the winding roller (310), and the other end of the traction rope (311) is connected to a hook (312) through a limiting ring (306) and a fixed pulley support rod (307). A U-shaped block (313) is provided on the inner side of the elastic closed adjustment plate (302), and the hook (312) is hinged to the inner side of the U-shaped block (313).

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