Super-energy-saving food steam box

Abstract

The invention relates to the field of steam boxes, and discloses an ultra-energy-saving food steam box which comprises a steam box body, a steam generator, a heat exchange mechanism and a steam circulating pump, the heat exchange mechanism comprises a heat exchange water tank, and the outer surface of the heat exchange water tank is provided with a steam inlet, a steam outlet, a waste gas inlet, a waste gas outlet, a water inlet pipeline and a water outlet pipeline; the steam inlet is used for receiving steam output from the steam box body, the waste gas inlet is used for receiving waste gas output from the steam generator, a heat exchange component is arranged between the steam inlet and the steam outlet, a heat exchange component is arranged between the waste gas inlet and the waste gas outlet, and each heat exchange component comprises an air inlet assembly, a heat exchange assembly and an air outlet assembly; steam or waste gas is guided into the heat exchange assembly through the gas inlet assembly and exhausted through the gas outlet assembly after heat exchange is achieved between the heat exchange assembly and water, and the heat exchange assembly rotates in the heat exchange process.

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; 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.

[0007] The present invention can realize heat recovery of steam and exhaust gas by setting a heat exchange water tank, which is both environmentally friendly and can improve energy utilization. The heat exchange water tank can supply free hot water with zero fuel cost, and can even supply excess heat to other places to earn fuel costs, which has huge benefits. The internal obstruction of the combustion branch pipe of the steam generator can delay the flow of flame, thereby extending the contact time between the flame and the combustion branch pipe and improving the flame utilization rate; within the limited combustion branch pipe length or fire tube length and steam generator volume, the energy calorific value of the flame is absorbed at double the speed to achieve the goal of producing a large amount of steam in the shortest time with the least fuel consumption.

[0008] Furthermore, the heat exchange component comprises a spiral pipe, and the spiral pipes in the two heat exchange components are respectively arranged between the steam inlet and the steam outlet and between the exhaust gas outlet and the exhaust gas inlet.

[0009] Furthermore, the steamer body includes several steaming zones, a steam circulation pipe and a steam recovery pipe are provided on one side of the steamer body, and both are connected to the several steaming zones, 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 described one by one here), and a steam input pipe is connected to one side of each steaming zone; The steam generator includes an outer shell, the outer surface of which is provided with an exhaust gas discharge port, a steam circulation port and a connecting valve. A plurality of connecting valves are provided and are respectively connected to a plurality of steam input pipes. The steam circulation port and the steam circulation pipeline are connected through a steam circulation pump. The steam recovery pipeline is connected to the steam inlet, and the exhaust gas inlet is connected to the exhaust gas discharge port.

[0010] Furthermore, a gas inlet is provided on the outer surface of the outer shell, a combustion main pipe connected to the gas inlet is installed in the outer shell, a plurality of combustion branch pipes are arranged in an array along the axial direction on the combustion main pipe, the combustion branch pipes are in a continuously bent shape, and obstacles are arranged in the combustion branch pipes, the ends of the plurality of combustion branch pipes are connected through an emission main pipe, and the emission main pipe and the exhaust gas discharge port are connected through the emission branch pipe.

[0011] Furthermore, an upper cover shell is provided at the upper end of the water exchange tank, and a lower cover shell is provided at the lower end. The heat exchange component includes an air intake component provided in the lower cover shell, a heat exchange component provided in the water exchange tank, and an air outlet component provided in the upper cover shell. Steam or exhaust gas is guided into the heat exchange component through the air intake component, and after heat exchange is achieved between the heat exchange component and water, it is discharged through the air outlet component. During the heat exchange process, the heat exchange component rotates. A core shaft is coaxially installed in the water exchange tank. The heat exchange assembly includes a heat exchange unit. The heat exchange unit includes a heat exchange pipe in a continuously bent shape and connected to the core shaft at both ends. A plurality of fins are distributed on the outer array of the heat exchange pipe.

[0012] Furthermore, a partition is provided inside the heat exchange pipe along its extension direction, and the partition divides the tube cavity of the heat exchange pipe into a left chamber and a right chamber. A plurality of through holes are arranged in an array along the extension direction on the end face of the partition, and convex leaves are extended at both openings of the through holes, and the convex leaves are in the shape of arc plates. The opening of the through hole includes a smooth section and an installation section where the convex leaves are provided, and the convex leaves are located directly in front of the smooth section along the gas flow direction in the heat exchange pipe.

[0013] Furthermore, a plurality of blades are arranged in an array along the circumferential direction on the outer circumferential surface of the core shaft.

[0014] Furthermore, the air intake assembly includes a fan casing, in which a fan is arranged, the bottom end of the core shaft extends into the lower cover casing and is poweredly connected to the fan through a gear set, the outer surface of the fan casing is connected with an air intake pipe and an air outlet pipe, the end of the air intake pipe is connected to the steam outlet or the exhaust gas outlet, and the end of the air outlet pipe is connected to the lower end of the heat exchange pipe through a lower rotary joint.

[0015] Furthermore, the gas outlet assembly includes a gas outlet valve, which includes a valve housing, and nozzles are extended from both ends of the valve housing, one nozzle is connected to the upper end of the heat exchange pipe through an upper rotary joint, and the other nozzle is used for discharging steam or exhaust gas; A movable seat is slidably installed in the valve housing, and a spring 1 is arranged between the movable seat and the valve housing, and the elastic force of the spring 1 drives the movable seat to move close to the upper rotary joint; The movable seat 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 is slidably installed in the movable seat along the vertical direction, a spring 2 is provided at the bottom of the sealing seat, an insert block is provided at the upper end of the sealing seat, a slot corresponding to the insert block is provided on the upper cavity wall of the valve shell, and a avoidance port for avoiding the insert block is provided on the movable seat. Initially, the spring 2 is in a compressed state, the insert block is inserted into the slot and limits the release of the elastic force of the spring 2, the sealing seat blocks the valve port and the avoidance port, and a step is provided above the slot.

[0016] Furthermore, a convex shell extends from the upper surface of the valve housing, and a pressure rod is slidably installed in the convex shell along the vertical direction. The upper end of the pressure rod extends out of the convex shell, and an avoidance hole for avoiding the pressure rod is opened on the upper surface of the valve housing. A spring three is arranged between the upper surface of the valve housing and an external step arranged on the outside of the pressure rod. A rotating disk is coaxially arranged on the upper end of the core shaft, and a plurality of unlocking rods are arranged in an array along the circumferential direction on the outer circular surface of the rotating disk. The lower end surface of the unlocking rod is arranged as an inclined surface. When the unlocking rod rotates with the core shaft, the inclined surface can push the pressure rod downward.

[0017] A further solution is to recover the heat from steam and exhaust gas to achieve energy saving. On this basis: 1. The flow of steam or exhaust gas will push the fan to rotate, and drive the core shaft to rotate through the gear set, thereby rotating the heat exchange component together. During the rotation process, on the one hand, the rotation of the heat exchange component can stir the water, and on the other hand, the core shaft will rotate with the blades, 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, but also indirectly improves the heat exchange effect. Moreover, the water is pushed to collide with the heat exchange unit, so when it contacts, the water has a tendency to be pressed on the surface of the heat exchange unit, which can further improve the heat exchange effect. In general, it can greatly improve the heat exchange effect between the gas in the heat exchange pipe and the water in the water exchange tank. The gas refers to steam or exhaust gas. 2. The air outlet valve is set to switch between an open state and a closed state. On the one hand, the air outlet valve in the closed state can prevent the gas in the heat exchange pipe from being discharged outward. Therefore, it can prolong the heat exchange time between the gas and water, thereby improving the heat exchange effect. When the air pressure in the heat exchange pipe reaches the preset value, it will automatically drive the air outlet valve to switch to an open state to discharge the gas after heat exchange. After discharge, the air outlet valve is promptly switched to a closed state through the unlocking rod. The advantages of this method are: on the one hand, the opening and closing of the air outlet valve can actively prolong the heat exchange time between the gas and 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 slow down the flow rate of the gas flow, which can also play a role in prolonging the heat exchange time and improving the heat exchange effect.

[0018] 3. When the gas flows in the heat exchange pipe, the gas will collide with the convex leaves, slowing down the flow rate of the gas. In addition, the gas after the collision splashes in all directions and rushes into the chamber on the other side from the through hole, colliding with the gas in the chamber on the other side. In this way, the flow rate of the gas can be greatly slowed down and the heat exchange effect can be improved. In addition, the partition and the convex leaves 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

[0019] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure of the present invention is schematically shown Figure 2 ; Figure 3 is a structural schematic diagram of a steam generator; Figure 4 is a schematic diagram of the interior of a steam generator; Figure 5 is a schematic diagram of the structure of the barrier; Figure 6 It is a cross-sectional schematic diagram of an obstruction in a gas branch pipe; Figure 7 The structure of the heat exchange mechanism in the first and second embodiments is shown in FIG. Figure 1 ; Figure 8 The structure of the heat exchange mechanism in the first and second embodiments is shown in FIG. Figure 2 ; Fig. 9 The schematic diagram of the hot water tank in the third embodiment is as follows: Figure 1 ; Fig.10 The schematic diagram of the hot water tank in the third embodiment is as follows: Figure 2 ; Fig.11 is an internal schematic diagram of the heat exchange mechanism in the third embodiment; Fig.12 It is a schematic diagram of the air intake assembly and the heat exchange assembly in the third embodiment; Fig.13 It is a schematic diagram of the heat exchange unit and the core shaft in the third embodiment; Fig.14 is a cross-sectional view of the lower rotary joint in the third embodiment; Fig.15 It is a partial cross-sectional view of the heat exchange pipe in the third embodiment; Fig.16 Schematic diagram of the air outlet valve and the unlocking lever in the third embodiment; Fig.17 A cross-sectional view of the air outlet valve in the closed state in the third embodiment; Fig.18 It is a schematic diagram of the sealing seat and the movable seat in the third embodiment; Fig.19 This is a cross-sectional view of the air outlet valve in the open state in Example 3.

[0020] The reference numerals in the accompanying drawings are: 100, steam box body; 101, steam circulation pipeline; 102, steam recovery pipeline; 103, steam input pipe; 200, steam generator; 201, outer shell; 202, exhaust gas outlet; 203, steam circulation outlet; 204, fire viewing port; 205, gas inlet; 206, water discharge and slag discharge outlet; 207, water level sensor; 208, connecting valve; 209, water supply outlet; 210, combustion main pipe; 211, steam generator; 212, steam generator; 213, steam generator; 214, steam generator; 215, steam generator; 216, steam generator; 217, steam generator; 218, steam generator; 219, steam generator; 220, steam generator; 221, steam generator; 222, steam generator; 223, steam generator; 224, steam generator; 225, steam generator; 226, steam generator; 227, steam generator; 228, steam generator; 229, steam generator; 230, steam generator; 231, steam generator; 232, steam generator; 233, steam generator; 234, steam generator; 235, steam generator; 236, steam generator; 237, steam generator; 238, steam generator; 239, steam generator; 240, steam generator; 241, steam generator; 242, steam generator; 243, steam generator; 244, steam generator; 245, steam generator; 246, steam generator; 247, steam generator; 248, steam generator; 249, steam generator; 250, steam generator; 251, steam generator; 252, steam generator; 253, steam generator; 254, steam generator; 255, steam generator; 256, steam generator; 257, steam 1. Combustion branch pipe; 212. Emission main pipe; 213. Emission branch pipe; 214. Obstruction; 300. Heat exchange mechanism; 301. Heat exchange water tank; 302. Upper cover shell; 303. Lower cover shell; 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, air intake assembly; 3131, air intake pipe; 3132, fan housing; 3133, fan; 3134, air outlet pipe; 3135, gear set; 314, heat exchange assembly; 3141, mandrel; 3142, heat exchange unit 1; 3143, heat exchange unit 2; 3144, fin; 3145, heat exchange pipe; 3146, blade; 3147, partition; 3148, through hole; 3149, convex leaf ; 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, plug; 320, spiral pipe one; 321, spiral pipe two; 400, steam circulation pump. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] Embodiment 1 Reference Figure 1-Figure 7 , an ultra-energy-saving food steamer, comprising a steamer body 100, a steam generator 200, a heat exchange mechanism 300 and a steam circulation pump 400.

[0023] The steamer body 100 includes several steaming zones. A steam circulation pipe 101 and a steam recovery pipe 102 are provided on one side of the steamer body 100. Both are connected to the several steaming zones and are provided with electric ball valves. Through the opening and closing coordination of the two electric ball valves, the steam in the steaming zone can flow into the steam circulation pipe 101 or the steam recovery pipe 102. A steam input pipe 103 is connected to one side of each steaming zone.

[0024] 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.

[0025] 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.

[0026] Working process of embodiment 1: Different foods require different steam temperatures. For foods that require low steam temperature, the steam can circulate between the steam box body 100 and the steam generator 200. The latter can heat the steam to a set value and then re-enter the circulation flow. However, some foods require higher steam temperature. The steam generator 200 cannot reheat the returned steam to a set value in a short time. Therefore, steam circulation cannot be used and the steam can only flow in one direction. Based on this, this embodiment has two modes: 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, and is heated and then sent back into the steaming area, and the cycle repeats like this; Secondly, the steam provided by the steam generator 200 enters the steaming area of ​​the steamer body 100 through the steam input pipe 103, enters the corresponding heat exchange component through the steam recovery pipe 102 and the steam inlet 304, exchanges heat with the water in the water exchange water tank 301, realizes steam heat recovery, and is finally discharged through the steam outlet 305 in the form of low-temperature condensed water.

[0027] In addition, in the first mode, after the steamer body 100 is used, the steam therein 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 exhaust gas generated by the combustion of gas in the steam generator 200 enters the corresponding heat exchange component through the exhaust gas discharge port 202 and the exhaust gas inlet 312 to achieve heat recovery.

[0028] One of the cores of this solution is heat recovery to achieve energy saving, so Example 2 and Example 3 are proposed. One of the cores of heat recovery is the heat exchange component. In this solution, two groups of heat exchange components are provided, corresponding to steam heat recovery and exhaust gas heat recovery respectively. The structures of these two groups of heat exchange components are consistent, but the layout of corresponding parts in shape and size is slightly different. It should be noted that in Example 2 and Example 3, the position 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, exhaust gas outlet 311 and exhaust gas inlet 312 arranged on the water exchange water tank 301 is slightly different, but the functions are completely consistent and will not be repeated.

[0029] 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%.

[0030] Embodiment 2 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.

[0031] Embodiment 3 Reference Figure 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.

[0032] Reference Fig.12 and Fig.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.

[0033] 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. Fig.15, a partition 3147 is arranged in the heat exchange pipe 3145 along its own extension direction, and the partition 3147 divides the tube cavity of the heat exchange pipe 3145 into a left chamber and a right chamber. A plurality of through holes 3148 are arranged in an array on the end face of the partition 3147 along the extension direction, and convex leaves 3149 are extended at the two orifices of the through hole 3148. The convex leaves 3149 are 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, one half is smooth without any protrusions, and the other half has convex leaves 3149. The convex leaves 3149 are located along the smooth orifice. Directly in front of the gas flow direction in the heat pipe 3145, its significance lies in that when the gas in the heat exchange pipe 3145 flows, the gas will collide with the convex blade 3149 to slow down the flow rate of the gas. In addition, the gas after the collision splashes in all directions and will rush into the chamber on the other side from the through hole 3148 and collide with the chamber on the other side. In this way, the flow rate of the gas can be greatly slowed down and the heat exchange effect can be improved. In addition, the partition 3147 and the convex blade 3149 are made of heat-conducting material, which further improves the heat exchange effect. The gas refers to steam or exhaust gas.

[0034] In a preferred embodiment, during the heat exchange process, the core shaft 3141 rotates and rotates with the heat exchange unit to achieve stirring of the water. In order to further improve the stirring effect and thus the heat exchange effect, refer to Fig.13 The outer cylindrical surface of the core shaft 3141 is provided with a plurality of blades 3146 in an array along the circumferential direction. The significance of this is that when the rotation occurs, the blades 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, thereby indirectly improving the heat exchange effect. On the other hand, the water is pushed to collide with the heat exchange unit, so 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.

[0035] Reference Fig.12 The air intake assembly 313 includes a fan casing 3132, in which a fan 3133 is arranged. The bottom end of the core shaft 3141 extends into the lower cover 303 and is poweredly connected to the fan 3133 via a gear set 3135. Furthermore, the transmission ratio of the gear set 3135 is greater than one, which is a reduction structure.

[0036] The outer surface of the fan housing 3132 is connected with an air inlet pipe 3131 and an air outlet pipe 3134, which 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 exhaust gas outlet 311, and the end of the air outlet pipe 3134 is connected to the lower end of the heat exchange pipe 3145 via the lower rotary joint 316. It should be noted that the lower rotary joint 316 and the upper rotary joint 317 described later are both achievable by existing rotary joint technology and will not be elaborated on.

[0037] 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.

[0038] Reference Fig.11 and Figure 16-Figure 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.

[0039] 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.

[0040] 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.

[0041] A convex shell extends from the upper surface of the valve housing 3191, and a pressure rod 3196 is slidably installed in the convex shell along the vertical direction. The upper end of the pressure rod 3196 extends out of the convex shell, and an avoidance hole for avoiding the pressure rod 3196 is opened on the upper surface of the valve housing 3191. A spring 3197 is arranged between the upper surface of the valve housing 3191 and an external step arranged on the outside of the pressure rod 3196.

[0042] A rotating disk is coaxially arranged at the upper end of the core shaft 3141, and 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 arranged as an inclined surface. When the unlocking rod 318 rotates following the core shaft 3141, the inclined surface can come into contact with the pressure rod 3196, thereby pushing the pressure rod 3196 downward, and the spring three 3197 is compressed. When the pressure rod 3196 moves downward, if the air outlet valve 319 is in an open state, the downward movement of the pressure rod 3196 will push the sealing seat 3194, so that the insert block 3198 is realigned with the slot. At this time, the spring one 3193 can release the 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.

[0043] Working process of embodiment 2: 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, and after heat exchange with water in the heat exchange pipe 3145, it is discharged to the outside through the air outlet valve 319, wherein: 1. The flow of steam or exhaust gas will push the fan to rotate, and drive the core shaft to rotate through the gear set, thereby rotating the heat exchange component together. During the rotation process, on the one hand, the rotation of the heat exchange component can stir the water, and on the other hand, the core shaft will rotate with the blades, 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, but also indirectly improves the heat exchange effect. Moreover, the water is pushed to collide with the heat exchange unit, so when it contacts, the water has a tendency to be pressed on the surface of the heat exchange unit, which can further improve the heat exchange effect. In general, it can greatly improve the heat exchange effect between the gas in the heat exchange pipe and the water in the water exchange tank. The gas refers to steam or exhaust gas. 2. The air outlet valve is set to switch between an open state and a closed state. On the one hand, the air outlet valve in the closed state can prevent the gas in the heat exchange pipe from being discharged outward. Therefore, it can prolong the heat exchange time between the gas and water, thereby improving the heat exchange effect. When the air pressure in the heat exchange pipe reaches the preset value, it will automatically drive the air outlet valve to switch to an open state to discharge the gas after heat exchange. After discharge, the air outlet valve is promptly switched to a closed state through the unlocking rod. The advantages of this method are: on the one hand, the opening and closing of the air outlet valve can actively prolong the heat exchange time between the gas and 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 slow down the flow rate of the gas flow, which can also play a role in prolonging the heat exchange time and improving the heat exchange effect.

[0044] 3. When the gas flows in the heat exchange pipe, the gas will collide with the convex leaves, slowing down the flow rate of the gas. In addition, the gas after the collision splashes in all directions and rushes into the chamber on the other side from the through hole, colliding with the gas in the chamber on the other side. In this way, the flow rate of the gas can be greatly slowed down and the heat exchange effect can be improved. In addition, the partition and the convex leaves are made of heat-conducting materials, which further increases the heat exchange contact area and improves the heat exchange effect.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An ultra-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) comprises a heat exchange water tank (301) and a heat exchange component arranged in the heat exchange water tank (301); the outer surface of the heat exchange water 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); the steam inlet (304) is used to receive steam output from a steam box body (100); the exhaust gas inlet (312) is used to receive exhaust gas output from a steam generator (200); and 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); A barrier (214) for delaying flame flow is arranged inside the steam generator (200).

2. The ultra-energy-saving food steamer according to claim 1, characterized in that: The heat exchange component comprises a spiral pipe, and 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 ultra-energy-saving food steamer according to claim 1, characterized in that: The steamer body (100) comprises a plurality of steaming zones, a steam circulation pipe (101) and a steam recovery pipe (102) are provided on one side of the steamer body (100), both of which are connected to the plurality of steaming zones, and both are provided with electric ball valves, and one side of each steaming zone is connected to a steam input pipe (103); The steam generator (200) comprises an outer shell (201), the outer surface of the outer shell (201) being provided with an exhaust gas discharge port (202), a steam circulation port (203) and a connecting valve (208), a plurality of connecting valves (208) being provided and respectively connected to a plurality of steam input pipes (103), the steam circulation port (203) and the steam circulation pipeline (101) being connected via a steam circulation pump (400), the steam recovery pipeline (102) being connected to the steam inlet (304), and the exhaust gas inlet (312) being connected to the exhaust gas discharge port (202).

4. The ultra-energy-saving food steamer according to claim 3, characterized in that: The outer surface of the outer shell (201) is also provided with a gas inlet (205); a combustion main pipe (210) connected to the gas inlet (205) is installed in the outer shell (201); a plurality of combustion branch pipes (211) are arranged in an array along the axis direction on the combustion main pipe (210); the combustion branch pipes (211) are in a continuously bent shape; a barrier (214) is arranged in the combustion branch pipe (211); the ends of the plurality of combustion branch pipes (211) are connected via an emission main pipe (212); and the emission main pipe (212) and the exhaust gas discharge port (202) are connected via an emission branch pipe (213).

5. The ultra-energy-saving food steamer according to claim 1, characterized in that: An upper cover shell (302) is arranged at the upper end of the water exchange tank (301), and a lower cover shell (303) is arranged at the lower end. The heat exchange component comprises 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 heat exchange is achieved between the heat exchange component (314) and water, the steam or exhaust gas is discharged through the air outlet component (315). During the heat exchange process, the heat exchange component (314) rotates. A core shaft (3141) is coaxially installed in the water exchange tank (301). The heat exchange assembly (314) comprises a heat exchange unit. The heat exchange unit comprises a heat exchange pipe (3145) in a continuously bent shape and connected to the core shaft (3141) at both ends. A plurality of fins (3144) are distributed in an array outside the heat exchange pipe (3145).

6. The ultra-energy-saving food steamer according to claim 5, characterized in that: A partition (3147) is provided inside the heat exchange pipe (3145) along its extension direction. The partition (3147) divides the tube cavity of the heat exchange pipe (3145) into a left chamber and a right chamber. The end surface of the partition (3147) is provided with a plurality of through holes (3148) in an array along the extension direction. Both openings of the through holes (3148) are provided with convex leaves (3149). The convex leaves (3149) are in the shape of an arc plate. The opening of the through hole (3148) includes a smooth section and a mounting section on which the convex leaves (3149) are provided. The convex leaves (3149) are located directly in front of the smooth section along the gas flow direction inside the heat exchange pipe (3145).

7. The ultra-energy-saving food steamer according to claim 6, characterized in that: A plurality of blades (3146) are arranged in an array along the circumferential direction on the outer circumferential surface of the core shaft (3141).

8. The ultra-energy-saving food steamer according to claim 6, characterized in that: The air intake assembly (313) comprises a fan casing (3132), a fan (3133) being arranged in the fan casing (3132), the bottom end of the core shaft (3141) extending into the lower casing (303) and being power-connected to the fan (3133) via a gear set (3135), an air intake pipe (3131) and an air outlet pipe (3134) being connected to the outer surface of the fan casing (3132), the end of the air intake pipe (3131) being connected to the steam outlet (305) or the exhaust outlet (311), and the end of the air outlet pipe (3134) being connected to the lower end of the heat exchange pipe (3145) via a lower rotary joint (316).

9. The ultra-energy-saving food steamer according to claim 8, characterized in that: The gas outlet assembly (315) comprises a gas outlet valve (319), the gas outlet valve (319) comprises a valve housing (3191), both ends of the valve housing (3191) are provided with nozzles, one nozzle is connected to the upper end of the heat exchange pipe (3145) via an upper rotary joint (317), and the other nozzle is used for discharging steam or exhaust gas; A movable seat (3192) is slidably mounted in the valve housing (3191), and a spring (3193) is disposed between the movable seat (3192) and the valve housing (3191). The elastic force of the spring (3193) drives the movable seat (3192) to move closer to the upper rotary joint (317). 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 clearance 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 clearance port, and a step is provided above the slot.

10. The ultra-energy-saving food steamer according to claim 9, characterized in that: A convex shell extends from the upper surface of the valve housing (3191), and 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, and an avoidance hole for avoiding the pressure rod (3196) is opened on the upper surface of the valve housing (3191). A spring three (3197) is arranged between the upper surface of the valve housing (3191) and an external step arranged outside the pressure rod (3196). A rotating disk is coaxially arranged at the upper end of the core shaft (3141), and a plurality of unlocking rods (318) are arranged in an array along the circumferential direction on the outer cylindrical surface of the rotating disk. The lower end surface of the unlocking rod (318) is arranged as an inclined surface. When the unlocking rod (318) rotates following the core shaft (3141), the inclined surface can push the pressure rod (3196) downward.

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