A super energy-saving food steamer

Abstract

The present invention relates to the field of steam ovens, and discloses an ultra-energy-saving food steam oven, which includes a steam oven body, a steam generator, a heat exchange mechanism, and a steam circulation pump. The heat exchange mechanism includes a hot water tank for heat exchange. The outer surface of the hot water tank is provided with a steam inlet, a steam outlet, an exhaust gas inlet, an exhaust gas outlet, a water inlet pipe, and a water outlet pipe. The steam inlet is used to receive the steam output from the steam oven body, and the exhaust gas inlet is used to receive the exhaust gas output from the steam generator. A heat exchange member is respectively arranged between the steam inlet and the steam outlet, and between the exhaust gas inlet and the exhaust gas outlet. The heat exchange member includes an air inlet assembly, a heat exchange assembly, and an air outlet assembly. The steam or exhaust gas is guided into the heat exchange assembly through the air inlet assembly, and after heat exchange with water in the heat exchange assembly, it is discharged through the air outlet assembly. During the heat exchange process, the heat exchange assembly rotates.

Description

Technical Field

[0001] The invention relates to the field of steamers, and in particular to an ultra-energy-saving food steamer. Background Art

[0002] A steamer is a mechanical device that uses steam to process food. Its core includes a steamer body, a steam generator, etc. Among them, the steam generator is a mechanical device that consumes fuel, heats water, and generates steam. A common one is a gas steam generator, which has a fast steam output speed, high thermal efficiency, and less pollutants in smoke. However, during use, the steam discharged from the steamer and the exhaust gas generated by combustion contain a large amount of heat. Directly discharging this heat will not only waste heat, but also be environmentally unfriendly. Therefore, it is necessary to recover the heat from the steam and the exhaust gas. The common heat recovery technology is heat exchange. In the prior art, heat exchange only allows steam or exhaust gas to exchange heat with water as a heat storage medium. By extending the length of the heat exchange pipe and increasing the heat exchange time, the heat exchange effect is improved. This method has some limitations. For example, the specific heat capacity of water is large, and the temperature of water near the heat exchange pipe is high, but the temperature of water far away from the heat exchange pipe is relatively low, resulting in an unsatisfactory heat exchange effect, which needs to be improved. The steam in the steamer has a fast flow rate when discharged, and it is easy to pass through the heat exchange pipe, resulting in a relatively poor heat exchange effect, which needs to be improved.

[0003] Based on the above, the present invention proposes an ultra-energy-saving food steamer. Summary of the invention

[0004] To solve the problems mentioned in the above background, the present invention provides an ultra-energy-saving food steamer.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0006] An ultra-energy-saving food steamer comprises a steamer body, a steam generator, a heat exchange mechanism and a steam circulation pump, the heat exchange mechanism comprises a water exchange tank and a heat exchange component arranged in the water exchange tank, the outer surface of the water exchange tank is provided with a steam inlet, a steam outlet, an exhaust gas inlet, an exhaust gas outlet, a water inlet pipe and a water outlet pipe, the steam inlet is used to receive steam output from the steamer body, the exhaust gas inlet is used to receive exhaust gas output from the steam generator, and a heat exchange component is respectively arranged between the steam inlet and the steam outlet and between the exhaust gas inlet and the exhaust gas outlet;

[0007] A barrier for delaying the flow of flame is arranged inside the steam generator; the barrier may preferably be a Tesla valve or an auger.

[0008] The present invention can achieve heat recovery of steam and waste gas by setting up a heat exchange water tank, which is not only environmentally friendly but also can improve energy utilization efficiency. The heat exchange water tank can supply free hot water with zero fuel cost, and even supply the excess heat to other places to earn fuel costs, with huge benefits.

[0009] The blockers inside the combustion branch pipes of the steam generator can play a role in delaying the flow of the flame, thereby prolonging the contact time between the flame and the combustion branch pipes and improving the utilization rate of the flame. Within the limited length of the combustion branch pipes or the length of the fire tubes and the volume of the steam generator, the energy calorific value of the flame is absorbed at double speed to generate a large amount of steam in the shortest time with the least amount of fuel consumed.

[0010] Furthermore, the heat exchange components include spiral pipes. The spiral pipes in the two heat exchange components are respectively arranged between the steam inlet and the steam outlet and between the waste gas outlet and the waste gas inlet.

[0011] Furthermore, the steam box body includes several steaming areas. One side of the steam box body is provided with a steam circulation pipe and a steam recovery pipe, both of which are connected to the several steaming areas, and both are provided with electric ball valves (in addition, the electric ball valves can also be replaced with valves with other functions according to other situations, which will not be elaborated here one by one). One side of each steaming area is connected with a steam input pipe.

[0012] The steam generator includes an outer shell body. The outer surface of the outer shell body is provided with a waste gas discharge port, a steam circulation port and a connection valve. There are multiple connection valves which are respectively connected to multiple steam input pipes. The steam circulation port and the steam circulation pipe are connected through a steam circulation pump. The steam recovery pipe is connected to the steam inlet, and the waste gas inlet is connected to the waste gas discharge port.

[0013] Furthermore, the outer surface of the outer shell body is also provided with a gas inlet. A combustion main pipe connected to the gas inlet is installed inside the outer shell body. A number of combustion branch pipes are arranged in an array along the axial center line direction on the combustion main pipe. The combustion branch pipes are in a continuous bent shape. The blockers are arranged inside the combustion branch pipes. The ends of the multiple combustion branch pipes are connected through a discharge main pipe, and the discharge main pipe and the waste gas discharge port are connected through a discharge branch pipe.

[0014] Furthermore, an upper cover shell is arranged at the upper end of the heat exchange water tank, and a lower cover shell is arranged at the lower end. The heat exchange components include an air inlet component arranged inside the lower cover shell, a heat exchange component arranged inside the heat exchange water tank, and an air outlet component arranged inside the upper cover shell. The steam or waste gas is guided into the heat exchange component through the air inlet component, and after heat exchange with water through the heat exchange component, it is discharged through the air outlet component. During the heat exchange process, the heat exchange component rotates.

[0015] A core shaft is coaxially installed inside the hot water exchange tank. The heat exchange assembly includes heat exchange units, and each heat exchange unit includes a heat exchange pipe that is continuously bent and has two ends connected to the core shaft. A number of fins are distributed in an array on the outer part of the heat exchange pipe.

[0016] Furthermore, a partition is arranged inside the heat exchange pipe along its extending direction. The partition divides the lumen of the heat exchange pipe into a left chamber and a right chamber. A number of through holes are arrayed on the end face of the partition along the extending direction. Convex lobes extend at both orifices of each through hole. The convex lobes are in the shape of arc plates. The orifices of the through holes include a smooth section and an installation section for setting the convex lobes. The convex lobes are located directly in front of the smooth section along the gas flow direction inside the heat exchange pipe.

[0017] Furthermore, a number of blades are arrayed on the outer cylindrical surface of the core shaft along the circumferential direction.

[0018] Furthermore, the air inlet assembly includes a fan housing. A fan is arranged inside the fan housing. The bottom end of the core shaft extends into the lower housing and is in power connection with the fan through a gear set. An air inlet pipe and an air outlet pipe are connected to the outer surface of the fan housing. The end of the air inlet pipe is connected to the steam outlet or the waste gas outlet. The end of the air outlet pipe is connected to the lower end of the heat exchange pipe through a lower rotary joint.

[0019] Furthermore, the air outlet assembly includes an air outlet valve. The air outlet valve includes a valve housing. Nozzles extend at both ends of the valve housing. One nozzle is connected to the upper end of the heat exchange pipe through an upper rotary joint. The other nozzle is used for discharging steam or waste gas;

[0020] A movable seat is slidably installed inside the valve housing. A first spring is arranged between the movable seat and the valve housing. The elastic force of the first spring drives the movable seat to move towards the upper rotary joint.

[0021] Valve openings are arranged on both sides of the movable seat in the width direction and on one side close to the air inlet nozzle. A sealing seat is slidably installed inside the movable seat in the vertical direction. A second spring is arranged at the bottom of the sealing seat. An insertion block is arranged at the upper end of the sealing seat. A slot corresponding to and matching the insertion block is arranged on the upper cavity wall of the valve housing. An avoidance opening for avoiding the insertion block is arranged on the movable seat. Initially, the second spring is in a compressed state. The insertion block is inserted into the slot and restricts the second spring from releasing its elastic force. The sealing seat blocks the valve openings and the avoidance opening. A step is arranged above the slot.

[0022] Furthermore, a convex shell extends on the upper surface of the valve housing. A pressure rod is slidably installed inside the convex shell in the vertical direction. The upper end of the pressure rod extends out of the convex shell. An avoidance hole for avoiding the pressure rod is arranged on the upper surface of the valve housing. A third spring is arranged between the upper surface of the valve housing and an external step arranged outside the pressure rod. A rotary disc is coaxially arranged at the upper end of the core shaft. A number of unlocking rods are arrayed on the outer cylindrical surface of the rotary disc along the circumferential direction. The lower end face of each unlocking rod is set as an inclined surface. During the rotation of the unlocking rod following the core shaft, the inclined surface can push down the pressure rod towards the lower side.

[0023] A further solution can recover the heat of steam and waste gas to achieve the purpose of energy conservation. On this basis:

[0024] 1. The flowing action of steam or waste gas will push the fan to rotate, drive the mandrel to rotate through the gear set, and thus drive the heat exchange component to rotate together. During the rotation process, on the one hand, the rotation action of the heat exchange component can stir the water, and on the other hand, the mandrel will drive the blades to rotate together, and the blades will push the water to flow outward and actively collide with the heat exchange unit, which not only improves the stirring effect and indirectly improves the heat exchange effect, but also when the water is pushed to collide with the heat exchange unit, there is a tendency for the water to be pressed against the surface of the heat exchange unit when contacting, which can further improve the heat exchange effect. Generally speaking, it can greatly improve the heat exchange effect between the gas in the heat exchange pipeline and the water in the heat exchange water tank. The gas refers to steam or waste gas;

[0025] 2. The air outlet valve is switched between the open state and the closed state. On the one hand, the air outlet valve in the closed state can prevent the gas in the heat exchange pipeline from being discharged outward. Therefore, it can extend the heat exchange time between the gas and the water, thereby improving the heat exchange effect. When the air pressure in the heat exchange pipeline reaches the preset value, it will automatically drive the air outlet valve to switch to the open state to discharge the heat-exchanged gas. After discharging, the air outlet valve is timely switched to the closed state through the unlocking rod. The advantages of this method are as follows: on the one hand, the opening and closing of the air outlet valve can actively extend the heat exchange time between the gas and the water and improve the heat exchange effect; on the other hand, the state switching of the air outlet valve utilizes the power generated by the gas flow. Therefore, it can passively delay the flow rate of the gas when flowing, and can also play a role in extending the heat exchange time and improving the heat exchange effect.

[0026] 3. When the gas flows in the heat exchange pipeline, the gas will collide with the convex blades to delay the flow rate of the gas. In addition, the collided gas splashes around and will then penetrate into the other chamber through the through hole and collide with the gas in the other chamber. In this way, the flow rate of the gas can be greatly delayed and the heat exchange effect can be improved. In addition, both the partition plate and the convex blades are made of heat-conducting materials, which further increases the heat exchange contact area and improves the heat exchange effect. Brief Description of the Drawings

[0027] Figure 1 is the structural schematic diagram of the present invention Figure 1 ;

[0028] Figure 2 is the structural schematic diagram of the present invention Figure 2 ;

[0029] Figure 3 is the structural schematic diagram of the steam generator;

[0030] Figure 4 It is an internal schematic diagram of a steam generator;

[0031] Figure 5 It is a structural schematic diagram of a barrier;

[0032] Figure 6 It is a cross-sectional schematic diagram of the barrier in the gas branch pipe;

[0033] Figure 7 It is a structural schematic diagram of the heat exchange mechanism in Embodiment 1 and Embodiment 2 Figure 1 ;

[0034] Figure 8 It is a structural schematic diagram of the heat exchange mechanism in Embodiment 1 and Embodiment 2 Figure 2 ;

[0035] Figure 9 It is a schematic diagram of a heat exchange water tank in Embodiment 3 Figure 1 ;

[0036] Figure 10 It is a schematic diagram of a heat exchange water tank in Embodiment 3 Figure 2 ;

[0037] Figure 11 It is an internal schematic diagram of the heat exchange mechanism in Embodiment 3;

[0038] Figure 12 It is a schematic diagram of the air inlet assembly and the heat exchange assembly in Embodiment 3;

[0039] Figure 13 It is a schematic diagram of the heat exchange unit and the core shaft in Embodiment 3;

[0040] Figure 14 It is a cross-sectional view of the lower rotary joint in Embodiment 3;

[0041] Figure 15 It is a partial cross-sectional view of the heat exchange pipe in Embodiment 3;

[0042] Figure 16 It is a schematic diagram of the air outlet valve and the unlocking rod in Embodiment 3;

[0043] Figure 17 It is a cross-sectional view of the air outlet valve in the closed state in Embodiment 3;

[0044] Figure 18 It is a schematic diagram of the sealing seat and the movable seat in Embodiment 3;

[0045] Figure 19 It is a cross-sectional view of the air outlet valve in the open state in Embodiment 3.

[0046] The reference numerals in the drawings are:

[0047] 100. Steamer body; 101. Steam circulation pipeline; 102. Steam recovery pipeline; 103. Steam inlet pipe; 200. Steam generator; 201. Outer housing; 202. Exhaust gas outlet; 203. Steam circulation port; 204. Fire viewing port; 205. Gas inlet; 206. Drainage and slag discharge port; 207. Water level sensor; 208. Connecting valve; 209. Water replenishing port; 210. Combustion main pipe; 211. Combustion branch pipe; 212. Discharge main pipe; 213. Discharge branch pipe; 214. Blocking object; 300. Heat exchange mechanism; 301. Hot water exchange tank; 302. Upper cover housing; 303. Lower cover housing; 304. Steam inlet; 305. Steam outlet; 306. Exhaust valve; 307. Pressure relief valve; 308. Temperature sensor; 309. Water outlet pipe; 310. Water inlet pipe; 311. Exhaust gas outlet; 312. Exhaust gas inlet; 313. Intake assembly; 3131. Intake pipe; 3132. Fan housing; 3133. Fan; 3134. Outlet pipe; 3135. Gear set; 314. Heat exchange assembly; 3141. Core shaft; 3142. Heat exchange unit one; 3143. Heat exchange unit two; 3144. Fins; 3145. Heat exchange pipeline; 3146. Blades; 3147. Partition; 3148. Through hole; 3149. Convex lobe; 315. Air outlet assembly; 316. Lower rotary joint; 317. Upper rotary joint; 318. Unlocking rod; 319. Air outlet valve; 3191. Valve housing; 3192. Movable seat; 3193. Spring one; 3194. Sealing seat; 3195. Spring two; 3196. Pressure rod; 3197. Spring three; 3198. Insert block; 320. Spiral pipeline one; 321. Spiral pipeline two; 400. Steam circulation pump. Detailed implementation manners

[0048] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0049] Embodiment 1

[0050] Refer to Figures 1 - 7 , a super energy-saving food steamer, including a steamer body 100, a steam generator 200, a heat exchange mechanism 300 and a steam circulation pump 400.

[0051] The steamer body 100 includes several steaming areas. A steam circulation pipeline 101 and a steam recovery pipeline 102 are arranged on one side of the steamer body 100. Both are connected to the several steaming areas and are provided with electric ball valves. Through the cooperation of the opening and closing of the two electric ball valves, the steam in the steaming area can flow into the steam circulation pipeline 101 or the steam recovery pipeline 102. One steam inlet pipe 103 is connected to one side of each steaming area.

[0052] The steam generator 200 includes an outer shell 201, and the outer surface of the outer shell 201 is provided with an exhaust gas discharge port 202, a steam circulation port 203, a fire viewing port 204, a gas inlet 205, a water discharge port 206, a connecting valve 208 and a water replenishment port 209, wherein the water replenishment port 209 is used to replenish water into the outer shell 201, and the water discharge port 206 is used to drain the water in the outer shell 201 after use. A plurality of connecting valves 208 are provided and are respectively connected to a plurality of steam input pipes 103, and the steam circulation port 203 is connected to the steam circulation pipeline 101 through a steam circulation pump 400. In addition, a combustion main pipe 210 connected to the gas inlet 205 is also installed in the outer shell 201, and the combustion main pipe 210 is along the axis. A plurality of combustion branch pipes 211 are distributed in a linear array. The combustion branch pipe 211 is in a continuously bent shape to increase the contact area between the combustion branch pipe 211 and the water. A barrier 214 is also provided in the combustion branch pipe 211. The barrier 214 may be a Tesla valve or an auger or other structure. The present embodiment is preferably an auger. The barrier 214 can delay the flow of flame and increase the heat exchange effect between the flame heat and water. The ends of the plurality of combustion branch pipes 211 are connected through a discharge main pipe 212. The discharge main pipe 212 and the exhaust gas discharge port 202 are connected through a discharge branch pipe 213. In addition, the fire viewing port 204 is used to observe the combustion of the gas. A water level sensor 207 is also provided in the outer shell 201 to monitor the remaining amount of water in the outer shell 201.

[0053] The heat exchange mechanism 300 includes a water exchange tank 301, and the outer surface of the water exchange tank 301 is provided with a steam inlet 304, a steam outlet 305, an exhaust gas inlet 312, an exhaust gas outlet 311, a water inlet pipe 310 and a water outlet pipe 309, wherein the steam recovery pipe 102 is connected to the steam inlet 304, the exhaust gas inlet 312 is connected to the exhaust gas discharge port 202, and heat exchange components are provided between the steam inlet 304 and the steam outlet 305, and between the exhaust gas inlet 312 and the exhaust gas outlet 311, for heat exchange between steam or exhaust gas and water in the water exchange tank 301, so as to achieve the purpose of heat recovery and energy saving. In addition, the heat exchange components can be used to heat the steam or exhaust gas with the water in the water exchange tank 301. The water inlet pipe 310 replenishes water into the water exchange tank 301, and the water in the water exchange tank 301 is taken out through the water outlet pipe 309. Both pipes are provided with valve bodies. In addition, a temperature sensor 308 is pre-buried in the water exchange tank 301 for monitoring the water temperature in the water exchange tank 301. An exhaust valve 306 and a pressure relief valve 307 are also extended from the upper end of the water exchange tank 301. The former is used to discharge the air in the water exchange tank 301 when replenishing water, and the latter is used to relieve the pressure of the water exchange tank 301 when the water exchange tank 301 heat exchanges too much heat, causing the water to boil and generating more steam, resulting in an increase in internal pressure, so as to avoid safety accidents.

[0054] Working process of embodiment 1:

[0055] The steam temperatures required for different foods are different. For foods with a low requirement for steam temperature, the steam can circulate between the steam box body 100 and the steam generator 200. After the latter heats the steam to the set value, the steam can re-participate in the circulation. However, for some foods with a high requirement for steam temperature, the steam generator 200 cannot re-heat the returned steam to the set value in a short time. Therefore, steam circulation cannot be used, and the steam can only flow unidirectionally. Based on this, there are two modes in this embodiment:

[0056] First, the steam provided by the steam generator 200 enters the steaming area of the steam box body 100 through the steam input pipe 103, and then returns to the steam generator 200 through the steam circulation pipe 101. After being heated, it is re-sent into the steaming area, and this process repeats.

[0057] Second, the steam provided by the steam generator 200 enters the steaming area of the steam box body 100 through the steam input pipe 103, and then enters the corresponding heat exchange component through the steam recovery pipe 102 and the steam inlet 304, where it exchanges heat with the water in the heat exchange water tank 301 to achieve steam heat recovery. Finally, it is discharged in the form of low-temperature condensed water through the steam outlet 305.

[0058] In addition, in the first mode, after the steam box body 100 is used, the steam inside also enters the corresponding heat exchange component through the steam recovery pipe 102 and the steam inlet 304 to achieve steam heat recovery. In addition, in both modes, the waste gas generated by the gas combustion in the steam generator 200 enters the corresponding heat exchange component through the waste gas discharge port 202 and the waste gas inlet 312 to achieve heat recovery.

[0059] One of the cores of this solution lies in heat recovery to achieve the purpose of energy conservation. Therefore, Embodiment Two and Embodiment Three are proposed. One of the cores of heat recovery lies in the heat exchange component. In this solution, there are two groups of heat exchange components, which respectively correspond to steam heat recovery and waste gas heat recovery. The structures of these two groups of heat exchange components are the same, but the layout of the corresponding parts is slightly different in terms of shape and size. It should be noted that in Embodiment Two and Embodiment Three, the layout of the steam inlet 304, steam outlet 305, exhaust valve 306, pressure relief valve 307, temperature sensor 308, water outlet pipe 309, water inlet pipe 310, waste gas outlet 311, and waste gas inlet 312 on the heat exchange water tank 301 is slightly different, but their functions are exactly the same and will not be elaborated.

[0060] This solution extends the contact time between the flame and the combustion branch pipe by setting up obstacles, thereby improving the flame utilization rate, and reducing the exhaust gas outlet temperature of the steam generator to below 100°C, greatly improving the hot gas utilization rate; this solution as a whole can realize heat recovery of steam and exhaust gas, which is both environmentally friendly and can improve energy utilization rate, making the steam generator save 70% energy compared to the traditional steam engine itself, the energy utilization rate of the steam cabinet is as high as over 99%, the CO2 and SO2 exhaust gas emissions are reduced by 99%, and the thermal efficiency is as high as 99%.

[0061] Embodiment 2

[0062] Reference Figure 7 and Figure 8 The heat exchange component includes a spiral pipe. The spiral pipes in the two heat exchange components are respectively named spiral pipe one 320 and spiral pipe two 321. The spiral pipe one 320 is arranged between the steam inlet 304 and the steam outlet 305, and the spiral pipe two 321 is arranged between the exhaust gas outlet 311 and the exhaust gas inlet 312. The heat exchange effect between steam or exhaust gas and water is improved by the spiral pipe in a spiral shape.

[0063] Embodiment 3

[0064] Reference Figures 9 - 11 An upper cover shell 302 is provided at the upper end of the water exchange tank 301, and a lower cover shell 303 is provided at the lower end. The heat exchange component includes an air intake component 313 arranged in the lower cover shell 303, a heat exchange component 314 arranged in the water exchange tank 301, and an air outlet component 315 arranged in the upper cover shell 302. Steam or exhaust gas is guided into the heat exchange component 314 through the air intake component 313, and after sufficient heat exchange is achieved between the heat exchange component 314 and water, it is discharged through the air outlet component 315. The three complement each other, which can greatly improve the heat exchange effect, thereby improving the energy saving effect.

[0065] Reference Figure 12 and Figure 13 A core shaft 3141 is coaxially installed in the water exchange water tank 301, and the heat exchange component 314 includes heat exchange units, among which the one corresponding to steam heat recovery is named heat exchange unit one 3142, and the one corresponding to exhaust gas heat recovery is named heat exchange unit two 3143. The heat exchange units in each heat exchange component 314 are arranged in a plurality of groups in an array along the circumferential direction of the core shaft 3141. Therefore, it is necessary for the heat exchange unit one 3142 and the heat exchange unit two 3143 to be staggered. For example, the heat exchange unit one 3142 is located between two adjacent heat exchange units two 3143.

[0066] The heat exchange unit includes a heat exchange pipe 3145 in a continuously bent shape and connected to the core shaft 3141 at both ends. The outer array of the heat exchange pipe 3145 is distributed with a plurality of fins 3144. Figure 15, a partition 3147 is arranged in the heat exchange pipe 3145 along its own extending direction. The partition 3147 divides the lumen of the heat exchange pipe 3145 into a left chamber and a right chamber. A plurality of through holes 3148 are arrayed on the end face of the partition 3147 along the extending direction. Convex lobes 3149 extend from both orifices of the through hole 3148. The convex lobe 3149 is in the shape of an arc plate with a central angle of 180 degrees. Therefore, the orifice of the through hole 3148 is divided into two parts. One part is smooth without any protrusions, and the other part has convex lobes 3149. The convex lobe 3149 is located directly in front of the smooth orifice along the gas flow direction in the heat exchange pipe 3145. The significance is that when the gas in the heat exchange pipe 3145 flows, the gas will collide with the convex lobe 3149, delaying the gas flow rate. In addition, the collided gas splashes around and will then rush into the other chamber through the through hole 3148 and collide with the other chamber. In this way, the gas flow rate can be greatly delayed and the heat exchange effect can be improved. In addition, both the partition 3147 and the convex lobe 3149 are made of heat-conducting materials, which further improves the heat exchange effect. The gas refers to steam or waste gas.

[0067] In a preferred embodiment, during the heat exchange process, the mandrel 3141 will rotate and drive the heat exchange unit to rotate together to realize the stirring of water. In order to further improve the stirring effect and thus improve the heat exchange effect, refer to Figure 13 , a plurality of blades 3146 are arrayed on the outer circumferential surface of the mandrel 3141 along the circumferential direction. The significance is that when a rotating action occurs, the blade 3146 will push the water to flow outward and actively collide with the heat exchange unit. On the one hand, the stirring effect is improved, thus indirectly improving the heat exchange effect. On the other hand, when the water is pushed to collide with the heat exchange unit, then when in contact, the water has a tendency to be pressed against the surface of the heat exchange unit, which can further improve the heat exchange effect.

[0068] Refer to Figure 12 , the air inlet assembly 313 includes a fan housing 3132. A fan 3133 is arranged in the fan housing 3132. The bottom end of the mandrel 3141 extends into the lower housing 303 and is power-connected to the fan 3133 through a gear set 3135. Further, the transmission ratio of the gear set 3135 is greater than one and is a speed-reducing structure.

[0069] An air inlet pipe 3131 and an air outlet pipe 3134 are connected to the outer surface of the fan housing 3132. The two are respectively located on both sides of the fan 3133. The end of the air inlet pipe 3131 is connected to the steam outlet 305 or the waste gas outlet 311. The end of the air outlet pipe 3134 is connected to the lower end of the heat exchange pipe 3145 through a lower rotary joint 316. It should be noted that both the lower rotary joint 316 and the upper rotary joint 317 described later are realized by existing rotary joint technologies and will not be elaborated.

[0070] Steam or exhaust gas enters the heat exchange pipe 3145 through the air inlet pipe 3131, the fan housing 3132, and the air outlet pipe 3134. During this process, the flow of steam or exhaust gas will push the fan 3133 to rotate, and drive the core shaft 3141 to rotate through the gear set 3135, thereby rotating the heat exchange component 314. In addition, the power of the fan 3133 can also be provided by the water power in the water inlet pipe 310. The power supply method can refer to the method of driving the fan 3133 to rotate by steam or exhaust gas, which will not be described here.

[0071] Reference Figure 11 and Figures 16 - 19 The gas outlet component 315 includes a gas outlet valve 319, and the gas outlet valve 319 includes a valve shell 3191. Both ends of the valve shell 3191 are extended with nozzles. One nozzle is connected to the upper end of the heat exchange pipe 3145 through the upper rotary joint 317, and is used for steam or exhaust gas to enter the valve shell 3191, and is named as the air inlet nozzle. The other nozzle is used for the discharge of steam or exhaust gas, and is named as the gas outlet nozzle.

[0072] A movable seat 3192 is slidably installed in the valve housing 3191, and a spring 3193 is provided between the movable seat 3192 and the valve housing 3191. The elastic force of the spring 3193 is used to drive the movable seat 3192 to move closer to the air inlet nozzle.

[0073] The movable seat 3192 is provided with valve ports on both sides along the width direction and on the side close to the air inlet nozzle. A sealing seat 3194 is slidably installed in the movable seat 3192 along the vertical direction. A spring 2 3195 is provided at the bottom of the sealing seat 3194. An insert block 3198 is provided at the upper end of the sealing seat 3194. A slot corresponding to the insert block 3198 is provided on the upper cavity wall of the valve housing 3191. A avoidance port for avoiding the insert block 3198 is provided on the movable seat 3192. Initially, the spring 2 3195 is in a compressed state, the insert block 3198 is inserted into the slot and limits the release of the elastic force of the spring 2 3195. The sealing seat 3194 blocks the valve port and the avoidance port, so that the upper end of the heat exchange pipe 3145 is blocked. As the air pressure in the heat exchange pipe 3145 continues to increase, it will overcome the elastic force of spring 1 3193 and drive the movable seat 3192 to move away from the air inlet nozzle. The movable seat 3192 will move with the sealing seat 3194. When the plug 3198 on the sealing seat 3194 is out of the slot, spring 2 3195 will release the elastic force to move the sealing seat 3194 upward, and the valve port will be opened. The gas in the heat exchange pipe 3145 can be discharged to the outside through the outlet valve 319. In addition, it should be noted that after the outlet valve 319 is opened at this time, the sealing seat 3194 moves upward and is blocked by the step set above the slot, which will limit the release of the elastic force of spring 1 3193 and the outlet valve 319 will continue to be open.

[0074] A convex shell extends from the upper surface of the valve housing 3191. A pressure rod 3196 is slidably installed vertically inside the convex shell. The upper end of the pressure rod 3196 extends out of the convex shell. An avoidance hole for avoiding the pressure rod 3196 is formed in the upper surface of the valve housing 3191. A third spring 3197 is arranged between the upper surface of the valve housing 3191 and an external step arranged outside the pressure rod 3196.

[0075] A rotating disc is coaxially arranged at the upper end of the mandrel 3141. A plurality of unlocking rods 318 are arranged in an array along the circumferential direction on the outer circumferential surface of the rotating disc. The lower end surface of the unlocking rod 318 is set as an inclined surface. During the rotation of the unlocking rod 318 following the mandrel 3141, the inclined surface can come into contact with the pressure rod 3196, thereby pushing the pressure rod 3196 downward. The third spring 3197 is compressed. When the pressure rod 3196 moves downward, if the air outlet valve 319 is in an open state, then the downward movement of the pressure rod 3196 will push the sealing seat 3194, so that the insertion block 3198 is aligned with the insertion slot again. At this time, the first spring 3193 can release elastic force, thereby pushing the movable seat 3192 and the sealing seat 3194 to move, so that the air outlet valve 319 is reset and closed.

[0076] Working process of the second embodiment:

[0077] Steam or waste gas enters the heat exchange pipeline 3145 through the intake pipe 3131, the fan housing 3132, and the outlet pipe 3134. After heat exchange with water in the heat exchange pipeline 3145, it is discharged outward through the air outlet valve 319, where:

[0078] 1. The flowing action of steam or waste gas will push the fan to rotate, drive the mandrel to rotate through the gear set, and thus drive the heat exchange assembly to rotate together. During the rotation process, on the one hand, the rotation action of the heat exchange assembly can stir the water, and on the other hand, the mandrel will drive the blades to rotate together, and the blades will push the water to flow outward and actively collide with the heat exchange unit, which not only improves the stirring effect and indirectly improves the heat exchange effect, but also when the water is pushed to collide with the heat exchange unit, there is a tendency for the water to be pressed against the surface of the heat exchange unit when in contact, which can further improve the heat exchange effect. Generally speaking, it can greatly improve the heat exchange effect between the gas in the heat exchange pipeline and the water in the heat exchange water tank. The gas refers to steam or waste gas;

[0079] 2. The air outlet valve is switched between the open state and the closed state. On the one hand, the air outlet valve in the closed state can prevent the gas in the heat exchange pipeline from being discharged outward. Therefore, it can extend the heat exchange time between the gas and the water, thereby improving the heat exchange effect. When the air pressure in the heat exchange pipeline reaches the preset value, it will automatically drive the air outlet valve to switch to the open state to discharge the heat-exchanged gas. After the discharge, the air outlet valve is timely switched to the closed state through the unlocking rod. The advantages of this method are as follows: on the one hand, the opening and closing of the air outlet valve can actively extend the heat exchange time between the gas and the water and improve the heat exchange effect; on the other hand, the state switching of the air outlet valve utilizes the power generated by the gas flow. Therefore, it can passively delay the flow rate of the gas when flowing, and can also play a role in extending the heat exchange time and improving the heat exchange effect.

[0080] 3. When the gas flows in the heat exchange pipeline, the gas will collide with the convex blades, delaying the flow rate of the gas. In addition, the collided gas splashes around and will then penetrate into the chamber on the other side through the through holes and collide with the gas in the chamber on the other side. In this way, the flow rate of the gas can be greatly delayed and the heat exchange effect can be improved. In addition, both the partition plate and the convex blades are made of heat-conducting materials, which further increases the heat exchange contact area and improves the heat exchange effect.

[0081] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content without departing from the technical solution scope of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A super energy-saving food steamer, comprising a steamer body (100), a steam generator (200), a heat exchange mechanism (300), and a steam circulation pump (400), characterized in that, The heat exchange mechanism (300) includes a hot water tank for heat exchange (301) and heat exchange components arranged inside the hot water tank for heat exchange (301). The outer surface of the hot water tank for heat exchange (301) is provided with a steam inlet (304), a steam outlet (305), an exhaust gas inlet (312), an exhaust gas outlet (311), a water inlet pipe (310), and a water outlet pipe (309). The steam inlet (304) is used to receive the steam output from the steaming box body (100), and the exhaust gas inlet (312) is used to receive the exhaust gas output from the steam generator (200). A heat exchange component is respectively arranged between the steam inlet (304) and the steam outlet (305) and between the exhaust gas inlet (312) and the exhaust gas outlet (311); Inside the steam generator (200), there is an obstruction (214) for delaying the flow of the flame; The upper end of the hot water tank for heat exchange (301) is provided with an upper housing (302), and the lower end is provided with a lower housing (303). The heat exchange components include an air inlet assembly (313) arranged inside the lower housing (303), a heat exchange assembly (314) arranged inside the hot water tank for heat exchange (301), and an air outlet assembly (315) arranged inside the upper housing (302). The steam or exhaust gas is guided into the heat exchange assembly (314) through the air inlet assembly (313), and after heat exchange with water through the heat exchange assembly (314), it is discharged through the air outlet assembly (315). During the heat exchange process, the heat exchange assembly (314) rotates; A core shaft (3141) is coaxially installed inside the hot water tank for heat exchange (301). The heat exchange assembly (314) includes heat exchange units. Each heat exchange unit includes a heat exchange pipe (3145) with a continuous bent shape and both ends connected to the core shaft (3141). A number of fins (3144) are arranged in an array on the outer part of the heat exchange pipe (3145); A partition (3147) is arranged inside the heat exchange pipe (3145) along its own extending direction. The partition (3147) divides the lumen of the heat exchange pipe (3145) into a left chamber and a right chamber. A number of through holes (3148) are arrayed on the end face of the partition (3147) along the extending direction. Convex lobes (3149) extend at both orifices of the through holes (3148). The convex lobes (3149) are in the shape of arc plates. The orifices of the through holes (3148) include a smooth section and an installation section where the convex lobes (3149) are arranged. The convex lobes (3149) are located directly in front of the smooth section along the gas flow direction inside the heat exchange pipe (3145).

2. The super energy-saving food steamer according to claim 1, characterized in that, The heat exchange components include spiral pipes. The spiral pipes in the two heat exchange components are respectively arranged between the steam inlet (304) and the steam outlet (305) and between the exhaust gas outlet (311) and the exhaust gas inlet (312).

3. The super energy-saving food steamer according to claim 1, wherein, The steaming box body (100) includes a number of steaming areas. A steam circulation pipe (101) and a steam recovery pipe (102) are arranged on one side of the steaming box body (100), and both are connected to the number of steaming areas. Electric ball valves are arranged on both of them. A steam input pipe (103) is connected to one side of each steaming area; The steam generator (200) includes a housing (201). An exhaust gas discharge port (202), a steam circulation port (203), and a connection valve (208) are provided on the outer surface of the housing (201). A plurality of connection valves (208) are provided and are respectively connected to a plurality of steam input pipes (103). A connection between the steam circulation port (203) and the steam circulation pipeline (101) is achieved through a steam circulation pump (400). The steam recovery pipeline (102) is connected to the steam inlet (304), and the exhaust gas inlet (312) is connected to the exhaust gas discharge port (202).

4. The super energy-saving food steaming oven according to claim 3, characterized in that, A gas inlet (205) is further provided on the outer surface of the housing (201). A main combustion pipe (210) connected to the gas inlet (205) is installed inside the housing (201). A number of combustion branch pipes (211) are arrayed along the axial line direction on the main combustion pipe (210). The combustion branch pipes (211) are in a continuously bent shape. A blocking object (214) is provided inside the combustion branch pipes (211). A connection between the ends of the plurality of combustion branch pipes (211) is achieved through a main discharge pipe (212). A connection between the main discharge pipe (212) and the exhaust gas discharge port (202) is achieved through a discharge branch pipe (213).

5. The super energy-saving food steaming oven according to claim 1, wherein A number of blades (3146) are arrayed along the circumferential direction on the outer cylindrical surface of the core shaft (3141).

6. The super energy-saving food steamer according to claim 1, characterized in that, The air intake assembly (313) includes a fan housing (3132). A fan (3133) is provided inside the fan housing (3132). The bottom end of the core shaft (3141) extends into the lower housing (303) and is in power connection with the fan (3133) through a gear set (3135). An intake pipe (3131) and an outlet pipe (3134) are connected to the outer surface of the fan housing (3132). The end of the intake pipe (3131) is connected to the steam outlet (305) or the exhaust gas outlet (311). The end of the outlet pipe (3134) is connected to the lower end of the heat exchange pipeline (3145) through a lower rotary joint (316).

7. The super energy-saving food steamer according to claim 6, characterized in that, The gas outlet assembly (315) includes a gas outlet valve (319). The gas outlet valve (319) includes a valve housing (3191). Nozzles extend from both ends of the valve housing (3191). One nozzle is connected to the upper end of the heat exchange pipeline (3145) through an upper rotary joint (317), and the other nozzle is for discharging steam or exhaust gas; A movable seat (3192) is slidably installed inside the valve housing (3191). A first spring (3193) is provided between the movable seat (3192) and the valve housing (3191). The elastic force of the first spring (3193) drives the movable seat (3192) to move closer to the upper rotary joint (317). Both sides of the movable seat (3192) in the width direction and the side close to the air inlet nozzle are provided with valve openings. A sealing seat (3194) is slidably installed in the movable seat (3192) in the vertical direction. A second spring (3195) is provided at the bottom of the sealing seat (3194). An insertion block (3198) is provided at the upper end of the sealing seat (3194). A slot corresponding to and matching the insertion block (3198) is provided on the upper cavity wall of the valve housing (3191). An avoidance opening for avoiding the insertion block (3198) is provided on the movable seat (3192). Initially, the second spring (3195) is in a compressed state. The insertion block (3198) is inserted into the slot and restricts the second spring (3195) from releasing elastic force. The sealing seat (3194) seals the valve opening and the avoidance opening. A step is provided above the slot.

8. The super energy-saving food steamer according to claim 7, characterized in that A convex shell extends from the upper surface of the valve housing (3191). A pressure rod (3196) is slidably installed in the convex shell in the vertical direction. The upper end of the pressure rod (3196) extends out of the convex shell. An avoidance hole for avoiding the pressure rod (3196) is provided on the upper surface of the valve housing (3191). A third spring (3197) is provided between the upper surface of the valve housing (3191) and an external step provided outside the pressure rod (3196). A rotating disk is coaxially provided at the upper end of the core shaft (3141). A plurality of unlocking rods (318) are arranged in an array along the circumferential direction on the outer circumferential surface of the rotating disk. The lower end surface of the unlocking rod (318) is set as an inclined surface. During the rotation of the unlocking rod (318) following the core shaft (3141), the inclined surface can push down the pressure rod (3196).

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