Cooking apparatus and control method thereof

Abstract

The application discloses a kind of cooking equipment and its control method, it is related to cooking utensil technical field, the cooking equipment includes: equipment main body, waste heat recovery unit and power generation and storage unit, equipment main body includes cooking cavity and the smoke exhaust passage that communicates cooking cavity;Waste heat recovery unit connects the smoke exhaust passage, for recycling the heat in the flue gas that the smoke exhaust passage discharges;Power generation and storage unit connects waste heat recovery unit, power generation and storage unit is configured to utilize the heat of waste heat recovery unit generation electricity.Recycling the heat in the flue gas that the smoke exhaust passage discharges to generate electricity by setting waste heat recovery unit and power generation and storage unit according to the cooking equipment of the embodiment of the application, improve the energy utilization efficiency of cooking equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooking appliances, in particular to a cooking device and a control method thereof. BACKGROUND

[0002] With the iteration and upgrading of cooking technology, cooking devices such as gas steam ovens are widely used in the fields of catering and food processing. The flue gas discharged from the cooking cavity after gas combustion is usually at a temperature of 100-300℃, and contains a large amount of low-temperature waste heat. The existing cooking devices have low recovery efficiency for low-temperature waste heat (less than 300℃), and cannot convert heat energy into electric energy, so the energy utilization efficiency of the cooking device is low. SUMMARY

[0003] One purpose of the present application is to provide a cooking device and a control method thereof, which recovers heat in flue gas discharged from a flue gas discharge passage by setting a waste heat recovery unit and a power generation and storage unit, and generates power, thereby improving the energy utilization efficiency of the cooking device.

[0004] According to the cooking device of the present application, the waste heat recovery unit is connected to the flue gas discharge passage, and is used to recover heat in flue gas discharged from the flue gas discharge passage. The power generation and storage unit is connected to the waste heat recovery unit, and is configured to generate power using the heat recovered by the waste heat recovery unit.

[0005] According to the cooking device of the present application, the waste heat recovery unit and the power generation and storage unit are set to recover heat in flue gas discharged from the flue gas discharge passage and generate power, thereby improving the energy utilization efficiency of the cooking device.

[0006] In addition, the cooking device according to the above-mentioned embodiments of the present application can also have the following additional technical features:

[0007] In some embodiments, the waste heat recovery unit includes a working fluid pump, an evaporator assembly, a turbine, and a condenser assembly. The working fluid pump, the evaporator assembly, the turbine, and the condenser assembly are connected to form a loop for the flow of working fluid. The evaporator assembly is connected to the flue gas discharge passage, and is used for heat exchange between the flue gas discharged from the flue gas discharge passage and the working fluid in the loop. The turbine is drivingly connected to the power generation and storage unit.

[0008] In some embodiments, the evaporator assembly includes a first evaporator and a second evaporator. The first evaporator and the second evaporator are connected in series between the working fluid pump and the turbine. The first evaporator is located upstream of the second evaporator. The first evaporator and the second evaporator are connected to the flue gas discharge passage.

[0009] In some embodiments, the cooking device is configured to control the flue gas flow of the flue gas passage to the first evaporator and the second evaporator according to the flue gas temperature of the flue gas passage.

[0010] In some embodiments, the cooking device is configured to control the flue gas passage to communicate with the first evaporator when the flue gas temperature of the flue gas passage is greater than or equal to a first temperature value and less than or equal to a second temperature value, and to control the flue gas passage to communicate with the second evaporator when the flue gas temperature of the flue gas passage is greater than the second temperature value.

[0011] In some embodiments, the first temperature value is greater than or equal to 120℃ and less than or equal to 130℃.

[0012] In some embodiments, the second temperature value is greater than or equal to 200℃ and less than or equal to 220℃.

[0013] In some embodiments, the waste heat recovery unit is configured to reduce the flow rate of the circuit and / or increase the flue gas flow of the flue gas passage to the first evaporator when the tube wall temperature value of the working medium flow channel in the first evaporator is lower than a third temperature value.

[0014] In some embodiments, the third temperature value is greater than 120℃.

[0015] In some embodiments, the first flue gas passage of the first evaporator and the second flue gas passage of the second evaporator are in communication, and the flue gas passage and the first flue gas passage of the first evaporator are in communication to form a first flue gas flow channel; the flue gas passage, the second flue gas passage of the second evaporator, and the first flue gas passage of the first evaporator are in communication to form a second flue gas flow channel.

[0016] In some embodiments, the first evaporator is configured as a plastic evaporator.

[0017] In some embodiments, the surface of the first evaporator is provided with a hydrophobic coating.

[0018] In some embodiments, the lower portion of the first evaporator is provided with a condensate water collection tank.

[0019] In some embodiments, the second evaporator is configured as a steel evaporator.

[0020] In some embodiments, the first evaporator and / or the second evaporator include a shell portion and a tube portion penetrating the shell portion, a first cavity communicating with the working medium pump is formed in the tube portion, and a second cavity communicating with the flue gas passage is formed between the shell portion and the tube portion.

[0021] In some embodiments, the working medium includes R245fa and / or R600a.

[0022] In some embodiments, the condenser assembly comprises a condenser and a cooler configured to cool the condenser, and the waste heat recovery unit is configured to control a tube wall temperature value of the condenser within a set range by the cooler.

[0023] In some embodiments, the set range is adjusted according to an ambient temperature value, wherein when the ambient temperature value is greater than or equal to a fourth temperature value and less than or equal to a fifth temperature value, the set range is a preset range; when the ambient temperature value is less than the fourth temperature value, the set range is lowered by a first floating value compared to the preset range; and when the ambient temperature value is greater than the fifth temperature value, the set range is raised by a second floating value compared to the preset range.

[0024] In some embodiments, the fourth temperature value is 15℃ and the fifth temperature value is 30℃.

[0025] In some embodiments, the first floating value is greater than or equal to 2℃ and less than or equal to 4℃.

[0026] In some embodiments, the second floating value is greater than or equal to 3℃ and less than or equal to 5℃.

[0027] In some embodiments, the preset range is within a range greater than or equal to 25℃ and less than or equal to 40℃.

[0028] In some embodiments, the set range is within a range greater than or equal to 25℃ and less than or equal to 40℃.

[0029] In some embodiments, the cooler is configured to cool the condenser in a constant pressure manner by cooling water.

[0030] In some embodiments, the cooking device is configured to control flue gas to pass to the waste heat recovery unit when the flue gas temperature of the flue gas passage is greater than or equal to a first temperature value, and control flue gas to be discharged from the cooking device when the flue gas temperature of the flue gas passage is less than the first temperature value.

[0031] In some embodiments, the power generation and storage unit comprises a generator and an electrical storage device, the generator is drivingly connected to the waste heat recovery unit, the electrical storage device is electrically connected to the generator, and the electrical storage device comprises a storage battery or a connecting seat for detachably mounting a storage battery.

[0032] The control method of the cooking device according to the embodiments of the present application, wherein the cooking device is the cooking device described above, and the control method comprises: when a preset condition is met, controlling the flue gas passage to communicate with the waste heat recovery unit, and controlling the waste heat recovery unit and the power generation and storage unit to operate, and the preset condition comprises that the flue gas temperature of the flue gas passage is greater than or equal to a sixth temperature value.

[0033] In some embodiments, the preset condition further comprises that a length of time during which the exhaust gas flow rate of the exhaust gas passage is greater than the first preset flow rate reaches a first preset length of time.

[0034] In some embodiments, the sixth temperature value is greater than or equal to 150℃ and less than or equal to 180℃, the first preset flow rate is greater than or equal to 1m / s and less than or equal to 3m / s, and the first preset length of time is greater than or equal to 3min and less than or equal to 5min.

[0035] In some embodiments, the waste heat recovery unit comprises a working medium pump, an evaporator assembly, a turbine and a condenser assembly, the working medium pump, the evaporator assembly, the turbine and the condenser assembly are connected to form a loop for the flow of working medium, the evaporator assembly is connected to the exhaust gas passage for heat exchange between the flue gas discharged by the exhaust gas passage and the working medium in the loop, and the turbine is drivingly connected to the power generation and energy storage unit, wherein the control method further comprises: after the waste heat recovery unit and the power generation and energy storage unit are operated, if the exhaust gas temperature is greater than a seventh temperature value, controlling the waste heat recovery unit to operate in a state of maximum working medium flow rate, and the opening degree between the exhaust gas passage and the evaporator assembly is 100%.

[0036] In some embodiments, if the exhaust gas temperature is greater than or equal to an eighth temperature value and less than or equal to the seventh temperature value, the working medium flow rate of the waste heat recovery unit is dynamically adjusted, and the evaporation temperature of the working medium in the evaporator assembly is controlled to be within a predetermined temperature range.

[0037] In some embodiments, if the exhaust gas temperature is less than the eighth temperature value, the opening degree between the exhaust gas passage and the evaporator assembly is reduced, and the working medium temperature in the condenser assembly is raised by a ninth temperature value.

[0038] In some embodiments, the seventh temperature value is greater than or equal to 200℃ and less than or equal to 300℃, the eighth temperature value is greater than or equal to 150℃ and less than or equal to 165℃, the ninth temperature value is greater than or equal to 4℃ and less than or equal to 6℃, and the predetermined temperature range is greater than or equal to 80℃ and less than or equal to 95℃. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 FIG. 1 is a structural schematic diagram of a cooking device in an embodiment of the present application.

[0040] Figure 2 FIG. 2 is a structural schematic diagram of a waste heat recovery unit in an embodiment of the present application.

[0041] Figure 3 FIG. 3 is a structural schematic diagram of a cooking device in an embodiment of the present application.

[0042] Figure 4 FIG. 4 is a flow schematic diagram of a cooking device in an embodiment of the present application.

[0043] Figure 5 is a working process diagram of an evaporator assembly of a cooking device in an embodiment of the present application.

[0044] Figure 6 is a flow diagram of a cooking device in an embodiment of the present application.

[0045] Figure 7 is a working process diagram of a condenser assembly of a cooking device in an embodiment of the present application.

[0046] Figure 8 is a flow diagram of a cooking device in an embodiment of the present application.

[0047] Figure 9 is a flow diagram of a control method of a cooking device in an embodiment of the present application.

[0048] Figure 10 is a flow diagram of a cooking device in an embodiment of the present application.

[0049] The reference signs: cooking device 100, device main body 10, smoke exhaust passage 11, waste heat recovery unit 20, working medium pump 21, evaporator assembly 22, first evaporator 221, second evaporator 222, turbine 23, condenser assembly 24, condenser 241, cooling liquid flow path 242, power generation and electricity storage unit 30, generator 31, electricity storage device 32. DETAILED DESCRIPTION

[0050] Embodiments of the present application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0051] In combination Figure 1 According to the cooking device 100 of the embodiment of the present application, the cooking device 100 comprises a device main body 10, a waste heat recovery unit 20 and a power generation and electricity storage unit 30, the device main body 10 comprises a cooking cavity and a smoke exhaust passage 11 communicating with the cooking cavity; the waste heat recovery unit 20 is connected to the smoke exhaust passage 11 and is used to recover heat in the flue gas discharged from the smoke exhaust passage 11; the power generation and electricity storage unit 30 is connected to the waste heat recovery unit 20 and is configured to generate electricity by using the heat recovered by the waste heat recovery unit 20. By providing the waste heat recovery unit 20 and the power generation and electricity storage unit 30, the heat in the flue gas discharged from the smoke exhaust passage 11 is recovered to generate electricity, thereby improving the energy utilization efficiency of the cooking device 100. The electrical energy in the power generation and electricity storage unit 30 can be used to supply power to the cooking device 100, thereby reducing the dependence of the cooking device 100 on external power supply and reducing the energy loss of the cooking device 100.

[0052] For example, the electric energy in the power generation and storage unit 30 can be transmitted to the cooking device 100 and used to power the cooking device 100, or used to power other devices, such as charging a mobile phone, etc. The components on the cooking device 100 can generate high-temperature flue gas and enter the cooking cavity, and the high-temperature flue gas can heat the items in the cooking cavity. The heat-exchanged flue gas still has a relatively high temperature and can enter the waste heat recovery unit 20 through the flue gas discharge channel 11. When the flue gas flows through the waste heat recovery unit 20, the waste heat recovery unit 20 can absorb the heat in the flue gas, thereby recovering the heat in the flue gas. The waste heat recovery unit 20 after absorbing the heat can transmit the heat to the power generation and storage unit 30, and the power generation and storage unit 30 generates electric energy by using the heat. The electric energy generated by the power generation and storage unit 30 can be used to power the cooking device 100 and maintain the normal operation of the cooking device 100, or used to power other devices.

[0053] The cooking device 100 in the embodiment of the present application can recover the heat in the flue gas by using the waste heat recovery unit 20, and generate electric energy by using the recovered heat through the power generation and storage unit 30, thereby reducing the emission of high-temperature flue gas during the operation of the cooking device 100 and reducing the energy loss of the cooking device 100. In addition, the cooking device 100 in the present application can be configured to use gas for cooking. For the cooking device 100 with a relatively low power consumption or a relatively low voltage, by configuring the power generation and storage unit 30, the dependence of the cooking device 100 on external power supply can be reduced, and the application range of the cooking device 100 can be expanded.

[0054] In addition, if the power generation and storage unit 30 generates a large amount of electric energy, a part of the electric energy can be directly used to power the cooking device 100, and the other part of the excess electric energy can be stored in the power generation and storage unit 30 to maintain the normal operation of the cooking device 100. When the flue gas temperature is relatively low, the electric energy stored in the power generation and storage unit 30 can be used to power the cooking device 100.

[0055] According to the cooking device 100 in the embodiment of the present application, by configuring the waste heat recovery unit 20 and the power generation and storage unit 30, the heat in the flue gas discharged through the flue gas discharge channel 11 is recovered to generate electric energy, thereby improving the energy utilization efficiency of the cooking device 100.

[0056] The power generation and storage unit 30 in the present application can include an organic Rankine cycle power generation system, an external combustion engine heat engine cycle power generation system, or a supercritical carbon dioxide cycle power generation system, etc. The present application mainly takes the organic Rankine cycle power generation system as an example for illustration, which is not a limitation on the protection scope of the present application.

[0057] In some embodiments, the power generation and storage unit 30 can be combined with the waste heat recovery unit 20. Figure 2 and Figure 3The waste heat recovery unit 20 comprises a working medium pump 21, an evaporator assembly 22, a turbine 23 and a condenser assembly 24, the working medium pump 21, the evaporator assembly 22, the turbine 23 and the condenser assembly 24 are connected to form a loop for the circulation of working medium, the evaporator assembly 22 is connected to the flue gas passage 11, and the flue gas discharged from the flue gas passage 11 exchanges heat with the working medium in the loop, and the turbine 23 is drivingly connected to the power generation and energy storage unit 30. Under the driving of the working medium pump 21, the working medium can circulate in the loop, so that the working medium absorbs the heat of the flue gas in the flue gas passage 11 in the evaporator assembly 22, the working medium expands to do work in the turbine 23 and drives the power generation and energy storage unit 30 to rotate, the power generation and energy storage unit 30 can convert mechanical energy into kinetic energy to realize power generation of the power generation and energy storage unit 30, and the working medium can be cooled in the condenser assembly 24. The cooled working medium can be re-input into the working medium pump 21 and enter the next cycle of the loop.

[0058] For example, the working medium pump 21 can pressurize the working medium, the working medium flowing through the working medium pump 21 can be input into the evaporator assembly 22 through the loop, the flue gas in the flue gas passage 11 can be introduced into the evaporator assembly 22 and exchange heat with the working medium in the evaporator assembly 22, the working medium flowing through the evaporator assembly 22 can absorb the heat of the flue gas, and the working medium after absorbing the heat can be heated to a superheated state. The superheated working medium can be input into the turbine 23 through the loop to expand and do work. The turbine 23 is drivingly connected to the power generation and energy storage unit 30, and mechanical energy can be transmitted to the power generation and energy storage unit 30 through a transmission component (such as a shaft coupling, a turbine shaft, etc.), the power generation and energy storage unit 30 can convert the mechanical energy into electrical energy to realize power generation of the power generation and energy storage unit 30.

[0059] Further, the working medium output from the turbine 23 can be input into the condenser assembly 24 through the loop, the condenser assembly 24 can further cool the working medium, so that the working medium can be cooled to a liquid state, the cooled working medium can be input into the working medium pump 21 through the loop to be pressurized, and the pressurized working medium enters the next cycle of the loop, so that the waste heat recovery unit 20 recovers the heat of the flue gas in the flue gas passage 11, and the power generation and energy storage unit 30 can generate electricity by using the recovered heat, thereby improving the energy utilization efficiency of the cooking equipment 100.

[0060] Alternatively, the turbine 23 can be provided with a nozzle and an impeller inside, and the thrust generated by the adiabatic expansion of the working medium can drive the impeller to rotate. When the working medium passes through the nozzle, the pressure energy can be converted into kinetic energy, and when the high-speed working medium flows through the impeller, the working medium impacts the blades on the impeller and drives the impeller to rotate. The impeller can convert the kinetic energy of the working medium into mechanical energy of the impeller, and the pressure of the working medium decreases and the temperature decreases.

[0061] In combination Figure 4In some embodiments, the evaporator assembly 22 includes a first evaporator 221 and a second evaporator 222, the first evaporator 221 and the second evaporator 222 are connected in series between the working medium pump 21 and the turbine 23, the first evaporator 221 is arranged upstream of the second evaporator 222, the first evaporator 221 and the second evaporator 222 are connected to the flue gas passage 11, the evaporation effect of the first evaporator 221 and the second evaporator 222 is improved, the possibility of flue gas corroding the first evaporator 221 and the second evaporator 222 is reduced, and the normal operation of the cooking device 100 is maintained.

[0062] For example, the flue gas in the flue gas passage 11 can pass into one of the first evaporator 221 and the second evaporator 222. When the flue gas in the flue gas passage 11 passes into the first evaporator 221, the working medium can be input into the first evaporator 221 after being pressurized by the working medium pump 21 and absorb the heat of the flue gas in the first evaporator 221. When the flue gas in the flue gas passage 11 passes into the second evaporator 222, the working medium is input into the second evaporator 222 after being pressurized by the working medium pump 21 and absorbs the heat in the flue gas in the second evaporator 222, thereby improving the heat exchange effect of the first evaporator 221 and the second evaporator 222.

[0063] Alternatively, the first evaporator 221 and the second evaporator 222 can be configured to recover heat from flue gas at different temperatures, thereby improving the efficiency of heat recovery of the cooking device 100 and reducing the waste of flue gas heat in the flue gas passage 11. Further, the second evaporator 222 can have better heat conductivity, heat resistance, corrosion resistance and other properties than the first evaporator 221. Therefore, the second evaporator 222 can be used to recover heat from flue gas at a higher temperature, and the first evaporator 221 can be used to recover heat from flue gas at a lower temperature, thereby improving the stability and reliability of the first evaporator 221 and the second evaporator 222 during operation, reducing the probability of corrosion and damage of the first evaporator 221 and the second evaporator 222, prolonging the service life of the first evaporator 221 and the second evaporator 222, and maintaining the normal operation of the cooking device 100. At the same time, the first evaporator 221 and the second evaporator 222 can be made of different materials, which can reduce the production cost of the first evaporator 221 and the second evaporator 222.

[0064] In combination Figures 4 to 6 In some embodiments, the cooking device 100 is configured to control the flow of flue gas from the flue gas passage 11 to the first evaporator 221 and the second evaporator 222 according to the flue gas temperature of the flue gas passage 11. In step S201, different temperature values of the flue gas temperature can control the flue gas passage 11 to pass to one of the first evaporator 221 and the second evaporator 222.

[0065] For example, but not limited to:

[0066] When the exhaust temperature is high, the flue gas of the exhaust passage 11 is controlled to flow into the second evaporator 222 entirely; when the exhaust temperature is low, the flue gas of the exhaust passage 11 is controlled to flow into the first evaporator 221 entirely;

[0067] Or, when the exhaust temperature is high, the flue gas of the exhaust passage 11 is controlled to flow into the first evaporator 221 entirely; when the exhaust temperature is low, the flue gas of the exhaust passage 11 is controlled to flow into the second evaporator 222 entirely.

[0068] Or, when the exhaust temperature is high, the flue gas of the exhaust passage 11 is controlled to flow into the first evaporator 221 entirely; when the exhaust temperature is low, the flue gas of the exhaust passage 11 is controlled to flow into the second evaporator 222 entirely.

[0069] Of course, the above description of the flow direction of the flue gas of the exhaust passage 11 according to the exhaust temperature is only some implementation manners of the present application, and the present application is mainly described as controlling the flue gas of the exhaust passage 11 to flow into the second evaporator 222 entirely when the exhaust temperature is high, and controlling the flue gas of the exhaust passage 11 to flow into the first evaporator 221 entirely when the exhaust temperature is low, but this is not a limitation on the protection scope of the present application, for example, the present application can also be configured to control a part of the flue gas of the exhaust passage 11 to flow into the second evaporator 222, another part to flow into the first evaporator 221, and the rest to be discharged from the cooking device 100 when the conditions are met.

[0070] For example, when the exhaust temperature is high, the exhaust passage 11 can flow into the second evaporator 222, the flue gas can flow through the second evaporator 222, and the working medium can absorb the heat of the flue gas in the second evaporator 222; when the exhaust temperature is low, the exhaust passage 11 can flow into the first evaporator 221, and the working medium can absorb the heat of the flue gas in the first evaporator 221, so as to realize the cooking device 100 to control the communication mode of the exhaust passage 11 and the evaporator assembly 22 according to the exhaust temperature, improve the evaporation effect of the first evaporator 221 and the second evaporator 222, and reduce the energy loss of the cooking device 100.

[0071] In some embodiments, the cooking device 100 is configured to: in step S202, control the smoke exhaust passage 11 to communicate with the first evaporator 221 when the exhaust temperature of the smoke exhaust passage 11 is greater than or equal to the first temperature value and less than or equal to the second temperature value; and in step S203, control the smoke exhaust passage 11 to communicate with the second evaporator 222 when the exhaust temperature of the smoke exhaust passage 11 is greater than the second temperature value, so as to control the communication mode of the smoke exhaust passage 11 and the evaporator assembly 22 according to the exhaust temperature of the smoke exhaust passage 11, improve the heat exchange efficiency of the first evaporator 221 and the second evaporator 222, reduce the probability of corrosion of the first evaporator 221 and the second evaporator 222 by the flue gas, and prolong the service life of the first evaporator 221 and the second evaporator 222.

[0072] For example, the first valve can be arranged in the smoke exhaust passage 11 and configured to guide the flue gas in the smoke exhaust passage 11 to one of the first evaporator 221 and the second evaporator 222. When the exhaust temperature of the smoke exhaust passage 11 is greater than or equal to the first temperature value and less than or equal to the second temperature value, the first valve can control the smoke exhaust passage 11 to communicate with the first evaporator 221, so that the flue gas in the smoke exhaust passage 11 flows into the first evaporator 221, and the working medium is driven by the working medium pump 21 to flow into the first evaporator 221 and absorb the heat of the flue gas in the first evaporator 221, thereby recovering the heat of the flue gas in the first evaporator 221.

[0073] In addition, when the exhaust temperature of the smoke exhaust passage 11 is greater than the second temperature value, the first valve can control the smoke exhaust passage 11 to communicate with the second evaporator 222, so that the flue gas in the smoke exhaust passage 11 flows into the second evaporator 222, and then flows into the first evaporator 221. The working medium is driven by the working medium pump 21 to flow into the first evaporator 221, absorb the heat of the flue gas in the first evaporator 221 for the first time, flow into the second evaporator 222, and absorb the heat of the flue gas in the second evaporator 222 for the second time. Through the staged evaporation of the first evaporator 221 and the second evaporator 222, the efficiency of recovering heat by the cooking device 100 is improved, the waste of heat of the flue gas in the smoke exhaust passage 11 is reduced, the stability and reliability of the first evaporator 221 and the second evaporator 222 during operation are improved, the probability of corrosion and damage of the first evaporator 221 and the second evaporator 222 is reduced, the service life of the first evaporator 221 and the second evaporator 222 is prolonged, and the normal operation of the cooking device 100 is maintained.

[0074] In some embodiments, the first temperature value is greater than or equal to 120°C and less than or equal to 130°C, the flue gas can contain water vapor and sulfuration gas, the water vapor and the sulfuration gas can combine to form acidic water vapor, the acid dew point temperature of the flue gas is about 120°C, the first temperature value is greater than or equal to 120°C and less than or equal to 130°C, which can ensure that the first temperature value is greater than the acid dew point temperature of the flue gas, avoid the acidic water vapor condensing on the wall surface of the first evaporator 221, and improve the corrosion resistance of the first evaporator 221.

[0075] In some embodiments, the second temperature value is greater than or equal to 200°C and less than or equal to 220°C, when the flue gas temperature of the flue gas passage 11 is greater than or equal to the first temperature value and less than or equal to the second temperature value, the flue gas passage 11 is communicated with the first evaporator 221, the second temperature value is greater than or equal to 200°C and less than or equal to 220°C, which can avoid the flue gas temperature being too high to cause the first evaporator 221 to deform, damage, etc., ensure that the flue gas temperature is within the temperature range that the first evaporator 221 can withstand, and improve the stability and reliability of the first evaporator 221.

[0076] In combination Figure 8 In some embodiments, when the wall surface temperature value of the working medium flow channel in the first evaporator 221 is lower than the third temperature value, the waste heat recovery unit 20 is configured to reduce the flow speed of the circuit and / or increase the flue gas flow of the flue gas passage 11 to the first evaporator 221, that is, when the wall surface temperature value of the working medium flow channel in the first evaporator 221 is lower than the third temperature value, the flow speed of the working medium in the circuit can be controlled to be reduced, or the flue gas flow of the flue gas passage 11 to the first evaporator 221 can be increased, or the flow speed of the working medium in the circuit can be controlled to be reduced while the flue gas flow of the flue gas passage 11 to the first evaporator 221 is increased, so as to increase the wall surface temperature of the working medium flow channel in the first evaporator 221, avoid the acidic water vapor in the flue gas corroding the surface of the first evaporator 221, and improve the dew point corrosion resistance of the first evaporator 221.

[0077] In some embodiments, the third temperature value is greater than 120°C, the flue gas can contain water vapor and sulfuration gas, the water vapor and the sulfuration gas can combine to form acidic water vapor, the acid dew point temperature of the flue gas is about 120°C, the first temperature value is greater than or equal to 130°C and less than or equal to 160°C, which can ensure that the first temperature value is greater than the acid dew point temperature of the flue gas, avoid the acidic water vapor condensing on the wall surface of the first evaporator 221, and improve the corrosion resistance of the first evaporator 221. Further, the third temperature value is greater than 120°C, the temperature of the working medium flowing in the first evaporator 221 can be maintained between 70°C and 110°C, which can ensure that the working medium has a high temperature after absorbing heat, and ensure the evaporation effect of the first evaporator 221.

[0078] In combination Figure 4In some embodiments, the first flue gas passage of the first evaporator 221 and the second flue gas passage of the second evaporator 222 are communicated, the exhaust passage 11 and the first flue gas passage of the first evaporator 221 are communicated to form a first flue gas flow channel, and the exhaust passage 11, the second flue gas passage of the second evaporator 222, and the first flue gas passage of the first evaporator 221 are communicated to form a second flue gas flow channel, so as to realize heat recovery of the cooking device 100 on flue gas and improve energy utilization of the cooking device 100.

[0079] For example, one end of the first flue gas passage is communicated with the second flue gas passage and the exhaust passage 11, and the other end is communicated with the external environment. After the flue gas enters the first flue gas passage, the flue gas can exchange heat with the working medium in the first evaporator 221, and the flue gas after heat exchange can be discharged to the external environment through the first flue gas passage; after the flue gas enters the second flue gas passage, the flue gas first enters the second flue gas passage from the exhaust passage 11, and exchanges heat with the working medium in the second evaporator 222 for the first time, and the flue gas after heat exchange can enter the first flue gas passage and exchange heat with the working medium in the first evaporator 221 for the second time, and the flue gas after the second heat exchange can be discharged to the outside of the cooking device 100 through the first flue gas passage. The working medium can absorb the heat of the flue gas in the first evaporator 221 or the first evaporator 221 and the second evaporator 222, so as to realize heat recovery of the cooking device 100 on flue gas and improve energy utilization of the cooking device 100; in addition, the temperature of the flue gas after heat exchange is reduced, and the flue gas with lower temperature is discharged to the external environment through the first flue gas passage, preventing the user from being scalded when the flue gas is discharged, and improving the safety of the cooking device 100; at the same time, the flue gas can flow out to the outside of the cooking device 100 through the first flue gas passage, avoiding excessive air pressure in the cooking device 100.

[0080] Optionally, the first evaporator 221 is configured as a plastic evaporator, wherein the flue gas can contain water vapor and a small amount of sulfuration gas, the water vapor can absorb the sulfuration gas and generate water vapor with acidity, and the material of the plastic evaporator can be selected from high-thermal-conductivity plastic, for example, plastic material reinforced by polyphenylene sulfide and 40% carbon fiber, which can improve the acid dew point corrosion resistance of the first evaporator 221.

[0081] Optionally, the surface of the first evaporator 221 is provided with a hydrophobic coating, wherein the flue gas can contain water vapor and a small amount of sulfuration gas, the water vapor can condense on the surface of the first evaporator 221 and form liquid condensate water, and the surface of the first evaporator 221 can be provided with a hydrophobic coating, for example, polytetrafluoroethylene, which can reduce the condensate water adhered to the surface of the first evaporator 221, so as to avoid the acid liquid generated by the condensate water absorbing the sulfuration gas from corroding the surface of the first evaporator 221, and prolong the service life of the first evaporator 221.

[0082] Optionally, a condensate water collecting groove is arranged below the first evaporator 221. Water vapor in the flue gas can condense on the surface of the first evaporator 221 and form liquid condensate water. The condensate water can drip into the condensate water collecting groove under the action of gravity, so as to reduce the condensate water adhering to the surface of the first evaporator 221 and avoid the condensate water absorbing the acidic liquid generated by the sulfuration gas to corrode the surface of the first evaporator 221. Optionally, the condensate water collecting groove can be automatically discharged periodically to prevent the liquid in the condensate water collecting groove from overflowing.

[0083] Optionally, the second evaporator 222 is configured as a steel evaporator. For example, the material of the second evaporator 222 can be ND steel. The steel evaporator has better heat transfer effect, which can improve the evaporation rate of the second evaporator 222. At the same time, the steel evaporator has strong corrosion resistance and high-temperature resistance and high structural strength, which is conducive to the second evaporator 222 to recover the heat of flue gas with a higher temperature, reduce the replacement frequency of the second evaporator 222, and reduce the maintenance cost of the second evaporator 222.

[0084] In some embodiments, the first evaporator 221 and / or the second evaporator 222 includes a shell part and a pipe part penetrating the shell part. The pipe part forms a first cavity communicating with the working medium pump 21, and the shell part and the pipe part form a second cavity communicating with the flue gas discharge channel 11. That is, the first evaporator 221 can include a shell part and a pipe part penetrating the shell part, the second evaporator 222 can include a shell part and a pipe part penetrating the shell part, and the first evaporator 221 and the second evaporator 222 can also simultaneously include a shell part and a pipe part penetrating the shell part. This increases the heat exchange area of the flue gas and the working medium and improves the heat exchange efficiency of the first evaporator 221 and the second evaporator 222.

[0085] For example, the shell part can include a plurality of pipe parts, and the working medium can flow in the plurality of pipe parts. When the working medium flows in the first cavity, the flue gas can flow in the second cavity. The heat in the flue gas can be transferred to the working medium through the wall surface of the pipe part. Specifically, the heat in the flue gas can be first transferred to the wall surface of the pipe part, and the working medium flows in the first cavity and absorbs the heat of the wall surface of the pipe part, thereby recovering the heat in the flue gas of the cooking equipment 100. At the same time, the working medium flows in the first cavity, and the flue gas flows in the second cavity. The flue gas can flow through the wall surface of the plurality of pipe parts and exchange heat with the working medium, thereby increasing the heat exchange area of the flue gas and the working medium and enhancing the evaporation effect of the first evaporator 221 and the second evaporator 222.

[0086] In some embodiments, the working medium includes R245fa and / or R600a, that is, the working medium can adopt R245fa (pentafluoropropane), the R245fa refrigerant is a colorless gas under normal conditions, has good safety; the ozone depletion potential of R245fa is 0, which will not cause damage to the earth's ozone layer, and has good environmental performance. Meanwhile, the R245fa refrigerant has high heat capacity and low boiling point, and has good evaporation characteristics. Alternatively, the working medium can also adopt R600a (isobutane), the ozone destruction potential of R600a is 0, and the global warming potential is only 3, which has good environmental performance; R600a has large evaporation latent heat, low boiling point, good flow performance and other advantages.

[0087] In combination with Figure 7 and Figure 8 In some embodiments, the condenser assembly 24 includes a condenser 241 and a cooler, the cooler is used to cool the condenser 241, the waste heat recovery unit 20 is configured to control the pipe wall temperature value of the condenser 241 within a set range through the cooler, reduce the temperature of the working medium in the condenser 241, and ensure that the working medium is fully liquefied, improve the condensing efficiency of the condenser 241, and maintain the stability of the circulating flow of the working medium in the circuit; at the same time, the liquefied working medium is input into the working medium pump 21 for compression, reducing the compression loss of the working medium pump 21.

[0088] For example, after the working medium flows out of the turbine 23, it is input into the condenser 241 through the circuit, the cooler cools the condenser 241, so that the pipe wall temperature of the condenser 241 is maintained within a set range, the working medium can flow in the condensing flow passage of the condenser 241, the cooler can cool the condenser 241 by continuously conveying cooling liquid, the cooling liquid can flow in the cooling liquid flow path 242 of the condenser 241 to absorb the heat of the working medium, and the working medium can be fully liquefied in the condensing flow passage to enhance the condensing effect of the condenser 241. When the pipe wall temperature value of the condenser 241 is less than the set range, the cooler can reduce the flow rate of the cooling liquid to increase the pipe wall temperature of the condenser 241; when the pipe wall temperature value of the condenser 241 is greater than the set range, the cooler can increase the flow rate of the cooling liquid to reduce the pipe wall temperature of the condenser 241, so as to ensure that the pipe wall temperature value of the condenser 241 is maintained within the set range.

[0089] Compared with directly compressing the gaseous working medium by the working medium pump 21, the working medium pump 21 compresses the liquid working medium, which can reduce the compression loss of the working medium pump 21; the liquid working medium is input into the evaporator assembly 22 after being compressed by the working medium pump 21 to exchange heat, so that the liquid working medium is converted into gaseous working medium; the gaseous working medium does work in the turbine 23, so that the power generation and energy storage unit 30 generates power; after flowing out of the turbine 23, the gaseous working medium enters the condenser 241, the condenser 241 condenses the gaseous working medium, and converts the gaseous working medium into liquid working medium, so that the working medium can be switched between gaseous and liquid states in the loop, ensuring the stability of the circulation of the working medium in the loop and maintaining the normal operation of the cooking device 100.

[0090] In some embodiments, in step S301, the range is adjusted according to the ambient temperature value, wherein in step S302, when the ambient temperature value is greater than or equal to the fourth temperature value and less than or equal to the fifth temperature value, the range is set to a preset range; in step S303, when the ambient temperature value is less than the fourth temperature value, the range is lowered by a first floating value compared to the preset range, so as to increase the power generation of the power generation and energy storage unit 30; in step S304, when the ambient temperature value is greater than the fifth temperature value, the range is raised by a second floating value compared to the preset range, so as to reduce the cooling energy consumption of the cooler.

[0091] For example, when the ambient temperature value is greater than or equal to the fourth temperature value and less than or equal to the fifth temperature value, the range is set to a preset range, and the pipe wall temperature of the condenser 241 is maintained within the preset range, so that the working medium in the condenser 241 is fully liquefied; when the ambient temperature value is less than the fourth temperature value, the range is lowered by a first floating value compared to the preset range, the pipe wall temperature of the condenser 241 is lowered, the temperature difference between the ambient temperature and the pipe wall temperature of the condenser 241 is reduced, to prevent the condenser 241 from overcooling and causing the working medium to freeze, while increasing the supercooling degree of the working medium, so that the working medium flowing through the evaporator assembly 22 can absorb more heat, and the working medium with more heat can do work in the turbine 23 and drive the power generation and energy storage unit 30, so as to increase the power generation of the power generation and energy storage unit 30.

[0092] In addition, when the ambient temperature value is greater than the fifth temperature value, the range is raised by a second floating value compared to the preset range, the pipe wall temperature of the condenser 241 is raised, the temperature difference between the ambient temperature and the pipe wall temperature of the condenser 241 is increased, the condensation speed of the working medium in the condenser 241 is accelerated, to ensure that the gaseous working medium can be fully liquefied in the condenser 241, and to avoid the working medium flowing through the condenser 241 still being in a gaseous state; at the same time, the pipe wall temperature of the condenser 241 is raised, the temperature of the cooling liquid in the cooler is also raised, and the cooling energy consumption of the cooler can be reduced.

[0093] In some embodiments, the fourth temperature value is 15°C, and the fifth temperature value is 30°C, that is, when the ambient temperature value is greater than or equal to 15°C and less than or equal to 30°C, the tube wall temperature of the condenser 241 can be maintained within the preset range, ensuring the condensation efficiency of the liquefied working medium of the condenser 241; when the ambient temperature value is less than 15°C, the tube wall temperature of the condenser 241 can be reduced to reduce the temperature difference between the ambient temperature and the tube wall temperature of the condenser 241; and when the ambient temperature value is greater than 30°C, the tube wall temperature of the condenser 241 can be increased to increase the temperature difference between the ambient temperature and the tube wall temperature of the condenser 241, thereby enhancing the condensation effect of the condenser 241.

[0094] In some embodiments, the first floating value is greater than or equal to 2°C and less than or equal to 4°C, wherein the set range can be lowered by 2°C, 3°C, and 4°C, etc. compared to the preset range, thereby reducing the temperature of the tube wall of the condenser 241, reducing the temperature difference between the ambient temperature and the tube wall temperature of the condenser 241, preventing the working medium from freezing due to excessive cooling of the condenser 241, and at the same time increasing the supercooling degree of the working medium. When the working medium flows through the evaporator assembly 22, it can absorb more heat, and the working medium with more heat can do work in the turbine 23 and drive the power generation and energy storage unit 30 to increase the power generation capacity of the power generation and energy storage unit 30.

[0095] In some embodiments, the second floating value is greater than or equal to 3°C and less than or equal to 5°C, wherein the set range can be raised by 3°C, 4°C, and 5°C, etc. compared to the preset range, thereby increasing the temperature of the tube wall of the condenser 241, increasing the temperature difference between the ambient temperature and the tube wall temperature of the condenser 241, ensuring that the gaseous working medium can be fully liquefied in the condenser 241, and avoiding the presence of gaseous working medium after the working medium flows through the condenser 241. At the same time, the tube wall temperature of the condenser 241 is increased, and the temperature of the cooling liquid in the cooler is also increased, which can reduce the cooling energy consumption of the cooler.

[0096] In some embodiments, the preset range is within a range of greater than or equal to 25°C and less than or equal to 40°C to ensure the normal operation of the condenser 241. When the working medium flows through the condenser 241, the heat of the working medium can be absorbed by the cooling liquid in the condenser 241 to convert the gaseous working medium into liquid working medium, thereby realizing the full liquefaction of the working medium in the condenser 241.

[0097] In some embodiments, the set range is within a range of greater than or equal to 25°C and less than or equal to 40°C to ensure the normal operation of the condenser 241. When the working medium flows through the condenser 241, the heat of the working medium can be absorbed by the cooling liquid in the condenser 241 to convert the gaseous working medium into liquid working medium, thereby realizing the full liquefaction of the working medium in the condenser 241.

[0098] In some embodiments, the cooler is configured to cool the condenser 241 in a constant pressure manner by cooling water, so as to avoid pressure fluctuation caused by temperature change, thereby preventing the condenser 241 from being damaged due to excessive or insufficient pressure, while ensuring that the working medium is fully liquefied. In this case, the subcooling degree of the working medium can be maintained at less than or equal to 5°C under the action of the condenser 241, so as to ensure that the working medium is fully liquefied in the condenser 241. Further, the cooler can control the temperature of the pipe wall of the condenser 241 by adjusting the flow rate of the cooling water. For example, when the cooler controls the flow rate of the cooling water to decrease, the cooling effect of the cooling water on the working medium is weakened, and the temperature of the pipe wall of the condenser 241 increases. When the cooler controls the flow rate of the cooling water to increase, the cooling effect of the cooling water on the working medium is enhanced, and the temperature of the pipe wall of the condenser 241 decreases.

[0099] In addition, the cooler can use cooling water, which has a low use cost, a high specific heat capacity and a high thermal conductivity, can quickly absorb and transfer heat, and has good flowability, facilitating recycling in the cooler.

[0100] In combination Figure 6 In some embodiments, the cooking device 100 is configured to control the flue gas to pass through the waste heat recovery unit 20 when the flue gas temperature in the flue gas passage 11 is greater than or equal to a first temperature value, and control the flue gas to be discharged from the cooking device 100 when the flue gas temperature in the flue gas passage 11 is less than the first temperature value, so as to ensure that the flue gas with a temperature greater than or equal to the first temperature value passes through the waste heat recovery unit 20 and recovers heat in the flue gas, and the flue gas with a temperature less than the first temperature value is directly discharged from the cooking device 100, thereby avoiding excessive pressure in the cooking cavity of the cooking device 100 and maintaining normal operation of the cooking device 100.

[0101] For example, the first temperature value is greater than or equal to 120°C and less than or equal to 130°C. The flue gas passage 11 can be provided with a second valve, which can be configured to selectively connect the flue gas passage 11 to one of the waste heat recovery unit 20 and the external environment. When the flue gas temperature in the flue gas passage 11 is greater than or equal to the first temperature value, the second valve can control the flue gas passage 11 to be connected to the waste heat recovery unit 20, so that the flue gas passes through the waste heat recovery unit 20, the waste heat recovery unit 20 recovers heat in the flue gas, and the power generation and storage unit 30 generates power by using the heat in the flue gas, thereby improving the energy utilization rate of the cooking device 100. When the flue gas temperature in the flue gas passage 11 is less than the first temperature value, the second valve can control the flue gas passage 11 to be connected to the external environment, so that the flue gas is discharged from the cooking device 100, thereby avoiding excessive pressure in the cooking cavity of the cooking device 100 and reducing the accumulation of flue gas in the flue gas passage 11, and maintaining normal operation of the cooking device 100.

[0102] Optionally, the first temperature value can be greater than or equal to 120℃ and less than or equal to 130℃, wherein the flue gas can contain water vapor and sulfuration gas, the water vapor can combine with the sulfuration gas to form acidic water vapor, the acid dew point temperature of the flue gas is about 120℃, and the first temperature value greater than or equal to 120℃ and less than or equal to 130℃ can ensure that the first temperature value is greater than the acid dew point temperature of the flue gas, so as to avoid the acidic water vapor from condensing on the wall surface of the evaporator assembly 22 and improve the corrosion resistance of the evaporator assembly 22.

[0103] In combination Figure 4 In some embodiments, the power generation and storage unit 30 can include a generator 31 and a power storage device 32, the generator 31 is in driving connection with the waste heat recovery unit 20, and the power storage device 32 is in electrical connection with the generator 31. The power storage device 32 can include a storage battery or a connecting seat for detachably mounting the storage battery, so that the generator 31 can generate electricity by using the recovered heat, and the excess electrical energy can be stored in the power storage device 32 to maintain the normal operation of the cooking device 100.

[0104] For example, the waste heat recovery unit 20 can include a working medium pump 21, an evaporator assembly 22, a turbine 23, and a condenser assembly 24, which are connected to form a loop for the flow of working medium. The working medium pump 21 can pressurize the working medium, and the working medium flowing through the working medium pump 21 can be input into the evaporator assembly 22 through the loop. The flue gas in the exhaust gas passage 11 can be introduced into the evaporator assembly 22 and exchanged with the working medium in the evaporator assembly 22. The working medium flowing through the evaporator assembly 22 can absorb the heat of the flue gas, and the heat-absorbed working medium can be input into the turbine 23 through the loop to expand and do work. The turbine 23 can be in driving connection with the generator 31, and mechanical energy can be transmitted to the generator 31 through a transmission component (such as a shaft coupling, a turbine shaft, etc.). The generator 31 can include a rotor and a stator, the rotor rotates in the stator and cuts the magnetic lines of force, thereby generating an induced electromotive force inside the generator 31. According to the principle of electromagnetic induction, the generator 31 can convert mechanical energy into electrical energy, thereby realizing power generation of the power generation and storage unit 30.

[0105] When the power generation amount of the generator 31 is large, the excess electrical energy can be input into the storage battery for storage; when the power generation amount of the generator 31 is small, the storage battery can supply power to the cooking device 100 to maintain the normal operation of the cooking device 100.

[0106] Optionally, the power storage device 32 can include a connecting seat for detachably mounting the storage battery, and the storage battery can be detachably mounted on the connecting seat, so as to facilitate the replacement of the storage battery by the power storage device 32 and reduce the replacement cost of the storage battery.

[0107] In combination Figure 9 and Figure 10According to the control method of the cooking device 100, when the preset condition is met, the heat recovery unit 20 recovers the heat of the flue gas in the flue gas passage 11, and the power generation and electricity storage unit 30 generates power by using the recovered heat, so as to improve the energy utilization rate of the cooking device 100. The electric energy in the power generation and electricity storage unit 30 can be used to supply power to the cooking device 100, so as to reduce the dependence of the cooking device 100 on external power supply and reduce the energy loss of the cooking device 100.

[0108] When the preset condition is met, the heat recovery unit 20 recovers the heat of the flue gas in the flue gas passage 11, and the power generation and electricity storage unit 30 generates power by using the recovered heat, so as to improve the energy utilization rate of the cooking device 100. The electric energy in the power generation and electricity storage unit 30 can be used to supply power to the cooking device 100, so as to reduce the dependence of the cooking device 100 on external power supply and reduce the energy loss of the cooking device 100.

[0109] For example, when the flue gas temperature in the flue gas passage 11 is greater than or equal to the sixth temperature value, the flue gas passage 11 can be controlled to communicate with the heat recovery unit 20, and the heat recovery unit 20 and the power generation and electricity storage unit 30 can be controlled to operate, and the power generation and electricity storage unit 30 can generate power. The components on the cooking device 100 can generate high-temperature flue gas and enter the cooking cavity, the high-temperature flue gas can exchange heat with the air in the cooking cavity, and the air in the cooking cavity can absorb the heat in the high-temperature flue gas to increase the temperature in the cooking cavity, thereby heating the items in the cooking cavity. The heat-exchanged flue gas still has a relatively high temperature, and can be introduced into the heat recovery unit 20 through the flue gas passage 11. When the flue gas flows through the heat recovery unit 20, the working medium in the heat recovery unit 20 can absorb the heat in the flue gas, thereby recovering the heat in the flue gas. The heat-absorbed working medium can be input into the power generation and electricity storage unit 30, and the power generation and electricity storage unit 30 generates power by using the heat absorbed by the working medium. The electric energy generated by the power generation and electricity storage unit 30 can be used to supply power to the cooking device 100, thereby reducing the energy loss of the cooking device 100 and maintaining the normal operation of the cooking device 100.

[0110] If the power generation and electricity storage unit 30 generates a large amount of electric energy, a part of the electric energy can be directly used to supply power to the cooking device 100, and the other part of the excess electric energy can be stored in the power generation and electricity storage unit 30 to maintain the normal operation of the cooking device 100. When the flue gas temperature is low, the stored electric energy in the power generation and electricity storage unit 30 can be used to supply power to the cooking device 100, thereby reducing the dependence of the cooking device 100 on external power supply.

[0111] Further, when the flue gas temperature in the flue gas passage 11 is less than or equal to the sixth temperature value, the heat recovery unit 20 and the power generation and electricity storage unit 30 can be temporarily not started, and the stored electric energy in the power generation and electricity storage unit 30 can be used to supply power to the cooking device 100, thereby maintaining the normal operation of the cooking device 100.

[0112] According to the control method of the cooking equipment 100, when the preset condition is met, the exhaust passage 11 is communicated with the waste heat recovery unit 20, and the waste heat recovery unit 20 and the power generation and storage unit 30 are controlled to operate. The waste heat recovery unit 20 recovers heat in the flue gas discharged from the exhaust passage 11, and the power generation and storage unit 30 generates power by using the heat of the recovered flue gas. The energy utilization efficiency of the cooking equipment 100 is improved, and the energy loss of the cooking equipment 100 is reduced.

[0113] In some embodiments, the preset condition further includes that the time length during which the exhaust flow rate of the exhaust passage 11 is greater than the first preset flow rate reaches the first preset time length. When the exhaust flow rate is greater than the first preset flow rate and the exhaust temperature is greater than or equal to the sixth temperature value, and the time length during which the exhaust flow rate is greater than the first preset flow rate reaches the first preset time length, the waste heat recovery unit 20 and the power generation and storage unit 30 are controlled to operate. This avoids frequent start-stop of the system caused by short-term fluctuations of the exhaust temperature and the exhaust flow rate, and ensures the stability and reliability of the operation of the waste heat recovery unit 20 and the power generation and storage unit 30, so as to maintain the normal operation of the cooking equipment 100.

[0114] In addition, if the exhaust flow rate is less than the first preset flow rate, or the time length during which the exhaust flow rate is greater than the first preset flow rate does not reach the first preset time length, or the time length during which the exhaust flow rate is greater than the first preset flow rate reaches the first preset time length and the exhaust temperature is less than the sixth temperature value, the waste heat recovery unit 20 and the power generation and storage unit 30 can not operate temporarily. This avoids frequent start-stop of the system caused by short-term fluctuations of the exhaust temperature and the exhaust flow rate, and can use the electrical energy stored in the power generation and storage unit 30 to supply power to the cooking equipment 100, so as to maintain the normal operation of the cooking equipment 100.

[0115] In some embodiments, the sixth temperature value is greater than or equal to 150°C and less than or equal to 180°C, the first preset flow rate is greater than or equal to 1 m / s and less than or equal to 3 m / s, and the first preset time length is greater than or equal to 3 min and less than or equal to 5 min. The sixth temperature value can be set to 150°C, 160°C, 175°C, or 180°C, etc., the first preset flow rate can be set to 1 m / s, 2 m / s, or 3 m / s, etc., and the first preset time length can be set to 3 min, 4 min, or 5 min, etc. When the exhaust temperature is greater than or equal to the sixth temperature value and the time length during which the exhaust flow rate is greater than or equal to the first preset flow rate is greater than the first preset time length, the cooking equipment 100 maintains normal operation, and the flue gas in the exhaust passage 11 has a certain temperature and a certain flow rate. This allows the waste heat recovery unit 20 to absorb heat in the flue gas, and the power generation and storage unit 30 to generate power by using the heat of the recovered flue gas, thereby improving the stability of the operation of the cooking equipment 100.

[0116] In combination Figure 4In some embodiments, the waste heat recovery unit 20 comprises a working medium pump 21, an evaporator assembly 22, a turbine 23 and a condenser assembly 24. In step S102, the working medium pump 21, the evaporator assembly 22, the turbine 23 and the condenser assembly 24 are connected to form a loop for the circulation of working medium. The evaporator assembly 22 is connected to the flue gas passage 11 for heat exchange between the flue gas discharged by the flue gas passage 11 and the working medium in the loop. The turbine 23 is drivingly connected to the power generation and energy storage unit 30. The control method further comprises the following step S103: after the waste heat recovery unit 20 and the power generation and energy storage unit 30 are operated, if the flue gas temperature is greater than the seventh temperature value, the waste heat recovery unit 20 is controlled to operate in a state of maximum working medium flow rate, and the opening degree between the flue gas passage 11 and the evaporator assembly 22 is 100%. At this time, the cooking device 100 is in a full-load power generation mode, and the cooking device 100 preferentially generates power, enhances the evaporation effect of the working medium in the evaporator assembly 22, and increases the power generation capacity of the power generation and energy storage unit 30.

[0117] For example, the working medium pump 21 can pressurize the working medium, and the working medium can be input into the evaporator assembly 22 through the loop after flowing through the working medium pump 21. The flue gas in the flue gas passage 11 can be input into the evaporator assembly 22 and heat exchanged with the working medium in the evaporator assembly 22. The working medium can absorb the heat of the flue gas when flowing through the evaporator assembly 22, and the working medium after absorbing the heat can be heated to a superheated state. The superheated working medium can be input into the turbine 23 through the loop to expand and do work. The turbine 23 is drivingly connected to the power generation and energy storage unit 30. The mechanical energy can be transmitted to the power generation and energy storage unit 30 through a transmission component (such as a shaft coupling, a turbine shaft, etc.), and the power generation and energy storage unit 30 can convert the mechanical energy into electrical energy to generate power.

[0118] Further, the working medium output from the turbine 23 can be input into the condenser assembly 24 through the loop. The condenser assembly 24 can further cool the working medium, so that the working medium can be cooled to a liquid state. The cooled working medium can be input into the working medium pump 21 through the loop to be pressurized. The pressurized working medium enters the next cycle of the loop, so that the waste heat recovery unit 20 recovers the heat of the flue gas in the flue gas passage 11, and the power generation and energy storage unit 30 can generate power by using the recovered heat, thereby improving the energy utilization efficiency of the cooking device 100.

[0119] If the exhaust gas temperature is greater than the seventh temperature value after the operation of the waste heat recovery unit 20 and the power generation and energy storage unit 30, the waste heat recovery unit 20 is controlled to operate at the maximum working medium flow rate, and the opening degree between the exhaust gas passage 11 and the evaporator assembly 22 is 100%. That is, the working medium flow rate in the circuit reaches the maximum value, the flue gas flow rate in the exhaust gas passage 11 reaches the maximum value, more flue gas can enter the evaporator assembly 22 to exchange heat with the working medium, more working medium can absorb the heat of the flue gas in the evaporator assembly 22, and more working medium can pass through the circuit to enter the turbine 23 to do work, thereby increasing the output power of the turbine 23 and the power generation capacity of the power generation and energy storage unit 30. At this time, the cooking device 100 is in a full-load power generation mode, and the power generation and energy storage unit 30 can prioritize power generation. In other words, the power generation and energy storage unit 30 can include a generator 31 and an energy storage device 32. The generator 31 can generate power in a rated working state. Part of the power generated by the generator 31 can be transmitted to the device main body 10 to maintain the normal operation of the cooking device 100, and the other part of the excess power can be stored in the energy storage device 32. If the power generation capacity of the generator 31 is small, the power stored in the energy storage device 32 can be transmitted to the device main body 10 to ensure the normal operation of the cooking device 100.

[0120] Further, the temperature of the working medium flowing in the evaporator assembly 22 can be maintained between 70°C and 110°C, ensuring that the working medium has a relatively high temperature after heat absorption. The working medium after heat absorption can be input into the turbine 23 to do work and drive the power generation and energy storage unit 30 to generate power, thereby increasing the power generation capacity of the power generation and energy storage unit 30.

[0121] In some embodiments, in step S104, if the exhaust gas temperature is greater than or equal to the eighth temperature value and less than or equal to the seventh temperature value, the working medium flow rate of the waste heat recovery unit 20 is dynamically adjusted, and the evaporation temperature of the working medium in the evaporator assembly 22 is controlled within a predetermined temperature range. At this time, the cooking device 100 is in an optimized efficiency mode. The working medium flow rate in the circuit is adjusted by adjusting the speed of the working medium pump 21 to control the evaporation temperature of the working medium in the evaporator assembly 22 within a predetermined temperature range. By reducing the evaporation temperature of the working medium and dynamically adjusting the working medium flow rate, the energy loss in the evaporator assembly 22 is reduced to improve the working efficiency of the cooking device 100.

[0122] For example, the working fluid pump 21 can control the working fluid flow in the circuit by adjusting the rotating speed. When the rotating speed of the working fluid pump 21 decreases, the working fluid flow in the circuit decreases; when the rotating speed of the working fluid pump 21 increases, the working fluid flow in the circuit increases. The flue gas in the flue gas passage 11 can enter the evaporator assembly 22 and exchange heat with the working fluid in the evaporator assembly 22. When the working fluid flows through the evaporator assembly 22, the working fluid can absorb the heat of the flue gas. If the flue gas temperature is greater than or equal to the eighth temperature value and less than or equal to the seventh temperature value, and the evaporation temperature of the working fluid in the evaporator assembly 22 is less than the predetermined temperature range, the rotating speed of the working fluid pump 21 can be reduced, the working fluid flow in the circuit is reduced, and the opening between the flue gas passage 11 and the evaporator assembly 22 can be increased, so that the working fluid flow in the circuit is reduced, and the working fluid can fully absorb the heat of the flue gas in the evaporator assembly 22 to increase the evaporation temperature of the working fluid.

[0123] In addition, if the flue gas temperature is greater than or equal to the eighth temperature value and less than or equal to the seventh temperature value, and the evaporation temperature of the working fluid in the evaporator assembly 22 is greater than the predetermined temperature range, the rotating speed of the working fluid pump 21 can be increased, the working fluid flow in the circuit is increased, and the opening between the flue gas passage 11 and the evaporator assembly 22 can be reduced, so that the heat absorption effect of the working fluid in the evaporator assembly 22 is reduced, the evaporation temperature of the working fluid is reduced, the energy loss of the evaporator assembly 22 is reduced, and the working efficiency of the cooking device 100 is improved.

[0124] In some embodiments, in step S105, if the flue gas temperature is less than the eighth temperature value, the opening between the flue gas passage 11 and the evaporator assembly 22 is reduced, and the working fluid temperature in the condenser assembly 24 is increased by the ninth temperature value, so that the condenser assembly 24 can fully liquefy the working fluid. At this time, the cooking device 100 is in a stable operation mode, which can prevent the working fluid from evaporating insufficiently in the evaporator assembly 22 and prevent the hydraulic impact of the turbine 23, so as to maintain the normal operation of the cooking device 100.

[0125] For example, if the exhaust temperature is less than the eighth temperature value, the opening degree between the exhaust passage 11 and the evaporator assembly 22 can be reduced to reduce the flow of flue gas into the evaporator assembly 22, so as to avoid wasting the energy in the high-temperature flue gas. At the same time, the speed of the working medium pump 21 can be reduced to reduce the flow of the working medium in the circuit, so as to ensure that the working medium in the evaporator assembly 22 is fully evaporated. The liquid working medium can be fully evaporated and converted into gaseous working medium in the evaporator assembly 22, and the gaseous working medium can be input into the turbine 23 through the circuit to do work, so as to prevent the turbine 23 from being subjected to hydraulic impact and improve the stability and reliability of the turbine 23. At the same time, the temperature of the working medium in the condenser assembly 24 can be increased to the ninth temperature value, so as to increase the temperature difference between the ambient temperature and the working medium temperature, so as to ensure that the gaseous working medium can be fully liquefied in the condenser 241, so as to enhance the condensing effect of the condenser assembly 24, so as to ensure that the working medium can be converted between liquid and gas, so that the working medium can circulate in the circuit, so as to maintain the normal operation of the cooking device 100.

[0126] Further, the exhaust passage 11 can be provided with a second valve, which can be configured to selectively communicate one of the evaporator assembly 22 and the external environment. When the exhaust temperature is less than the eighth temperature value, the second valve can control the exhaust passage 11 to communicate with the waste heat recovery unit 20, and the opening degree between the exhaust passage 11 and the evaporator assembly 22 is reduced, that is, the second valve can control the valve core to move to reduce the opening degree of the valve port. The first valve can be further provided between the second valve and the evaporator assembly 22, and the evaporator assembly 22 can further include a first evaporator 221 and a second evaporator 222. The first valve can be configured to guide the exhaust passage 11 to communicate with one of the first evaporator 221 and the second evaporator 222. The first valve can reduce the flow of flue gas into the first evaporator 221 or the second evaporator 222 by moving the valve core to reduce the opening degree of the valve port.

[0127] In some embodiments, the seventh temperature value is greater than or equal to 200°C and less than or equal to 300°C, wherein the seventh temperature value can be 200°C, 220°C, 245°C, 260°C, 275°C, 290°C, and 300°C, etc. The flue gas in the exhaust passage 11 has a relatively high temperature, and the flue gas in the exhaust passage 11 is introduced into the evaporator assembly 22 and exchanges heat with the working medium in the evaporator assembly 22. The working medium absorbs the heat of the flue gas when flowing through the evaporator assembly 22, so as to enhance the evaporation effect of the working medium in the evaporator assembly 22. The gaseous working medium is input into the turbine 23 through the circuit to do work, so as to increase the output power of the turbine 23, and increase the power generation of the power generation and energy storage unit 30.

[0128] Optionally, the eighth temperature value is greater than or equal to 150 DEG C and less than or equal to 165 DEG C, wherein the eighth temperature value can be set as 150 DEG C, 155 DEG C, 160 DEG C and 165 DEG C, etc., to ensure that the flue gas in the flue gas passage 11 has a certain temperature, to ensure the evaporation effect of the working medium in the evaporator assembly 22, so that the liquid working medium is converted into gaseous working medium, and the possibility of hydraulic impact of the turbine 23 is reduced.

[0129] Optionally, the ninth temperature value is greater than or equal to 4 DEG C and less than or equal to 6 DEG C, wherein the ninth temperature value can be set as 4 DEG C, 5 DEG C and 6 DEG C, etc., to increase the temperature of the working medium in the condenser 241, to increase the temperature difference between the ambient temperature and the working medium temperature, to ensure that the gaseous working medium can be fully liquefied in the condenser 241, to avoid that there is still gaseous working medium after the working medium flows through the condenser 241, and to enhance the condensing effect of the condenser assembly 24; further, the temperature of the working medium in the condenser 241 is increased, the temperature of the pipe wall of the condenser 241 is increased, and the temperature of the coolant in the cooler can also be increased correspondingly, so that the cooling energy consumption of the cooler can be reduced.

[0130] Optionally, the predetermined temperature range is in a range greater than or equal to 80 DEG C and less than or equal to 95 DEG C, wherein the predetermined temperature range can be in a range of 80 DEG C to 85 DEG C, 85 DEG C to 90 DEG C, 90 DEG C to 95 DEG C, or 80 DEG C to 95 DEG C, to reduce the energy loss in the evaporator assembly 22, to ensure that the working medium is heated in the evaporator assembly 22 and converted into gaseous working medium, and to generate electricity in the power generation and energy storage unit 30.

[0131] In combination Figure 10 , the specific working process of the cooking equipment 100 in the embodiment of the present application includes the following steps:

[0132] S501: The cooking equipment 100 is running, and the high-temperature flue gas in the cooking cavity is discharged from the flue gas passage 11 to the outside of the cooking cavity, wherein the power storage device 32 in the power generation and energy storage unit 30 can supply power to the cooking equipment 100 to maintain the normal operation of the cooking equipment 100;

[0133] S502: According to the flue gas temperature, the flue gas is controlled to pass through the waste heat recovery unit 20 or to be discharged from the cooking equipment 100;

[0134] S101: When the preset condition is met, the flue gas passage 11 is controlled to communicate with the waste heat recovery unit 20, and the waste heat recovery unit 20 and the power generation and energy storage unit 30 are controlled to operate;

[0135] S102: The working medium pump 21, the evaporator assembly 22, the turbine 23 and the condenser assembly 24 are connected to form a loop for the working medium to flow through, the evaporator assembly 22 is connected to the flue gas passage 11, and the turbine 23 is drivingly connected with the power generation and energy storage unit 30;

[0136] S201: According to the smoke exhaust temperature control, the smoke exhaust passage 11 is communicated with the first evaporator 221 or the second evaporator 222;

[0137] S301: According to the ambient temperature value, the set range of the tube wall temperature value of the condenser 241 is adjusted.

[0138] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0139] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0140] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0141] In the present application, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0142] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the description herein of certain examples does not necessarily exclude these examples from the scope of the application, and these examples can be combined with each other for the purposes of one or more other examples.

[0143] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be interpreted as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A cooking appliance (100), characterized in that, include: The main body of the equipment (10) includes a cooking cavity and a smoke exhaust channel (11) communicating with the cooking cavity; Waste heat recovery unit (20), which is connected to the flue gas exhaust channel (11) and is used to recover the heat in the flue gas discharged from the flue gas exhaust channel (11); A power generation and energy storage unit (30) is connected to the waste heat recovery unit (20), and the power generation and energy storage unit (30) is configured to generate electricity using the heat recovered by the waste heat recovery unit (20). The waste heat recovery unit (20) includes a working fluid pump (21), an evaporator assembly (22), a turbine (23), and a condenser (241). The working fluid pump (21), the evaporator assembly (22), the turbine (23), and the condenser (241) are connected to form a circuit for the flow of working fluid. The evaporator assembly (22) is connected to the flue gas duct (11) for heat exchange between the flue gas discharged from the flue gas duct (11) and the working fluid in the circuit. The turbine (23) is connected to the power generation and energy storage unit (30) by transmission. The evaporator assembly (22) includes a first evaporator (221) and a second evaporator (222), which are connected in series between the working fluid pump (21) and the turbine (23). The first evaporator (221) is located upstream of the second evaporator (222), and the first evaporator (221) and the second evaporator (222) are connected to the flue gas duct (11). The first flue gas passage of the first evaporator (221) and the second flue gas passage of the second evaporator (222) are connected. The exhaust passage (11) and the first flue gas passage of the first evaporator (221) are connected to form a first exhaust flow channel. The exhaust passage (11), the second flue gas passage of the second evaporator (222) and the first flue gas passage of the first evaporator (221) are connected to form a second exhaust flow channel.

2. The cooking apparatus (100) according to claim 1, characterized in that, The cooking device (100) is configured to control the flue gas flow rate from the exhaust duct (11) to the first evaporator (221) and the second evaporator (222) based on the exhaust gas temperature of the exhaust duct (11).

3. The cooking apparatus (100) according to claim 1, characterized in that, The cooking device (100) is configured as follows: When the exhaust temperature of the exhaust channel (11) is greater than or equal to a first temperature value and less than or equal to a second temperature value, the exhaust channel (11) is controlled to connect to the first evaporator (221); When the exhaust temperature of the exhaust channel (11) is greater than the second temperature value, the exhaust channel (11) is controlled to connect to the second evaporator (222).

4. The cooking apparatus (100) according to claim 3, characterized in that, The first temperature value is greater than or equal to 120°C and less than or equal to 130°C; and / or, the second temperature value is greater than or equal to 200°C and less than or equal to 220°C.

5. The cooking apparatus (100) according to claim 1, characterized in that, The waste heat recovery unit (20) is configured to reduce the flow rate of the circuit and / or increase the flow rate of the exhaust channel (11) to the first evaporator (221) when the wall temperature of the working fluid flow channel in the first evaporator (221) is lower than the third temperature value.

6. The cooking apparatus (100) according to claim 5, characterized in that, The third temperature value is greater than 120℃.

7. The cooking apparatus (100) according to any one of claims 1-6, characterized in that, The first evaporator (221) is configured as a plastic evaporator; and / or, the surface of the first evaporator (221) is provided with a hydrophobic coating; and / or, a condensate collection tank is provided below the first evaporator (221); and / or, the second evaporator (222) is configured as a steel evaporator.

8. The cooking apparatus (100) according to any one of claims 1-6, characterized in that, The first evaporator (221) and / or the second evaporator (222) include a shell portion and a tube portion passing through the shell portion. A first cavity communicating with the working fluid pump (21) is formed in the tube portion, and a second cavity communicating with the exhaust passage (11) is formed between the shell portion and the tube portion.

9. The cooking apparatus (100) according to claim 1, characterized in that, The working fluid includes R245fa and / or R600a.

10. The cooking apparatus (100) according to claim 1, characterized in that, The condenser (241) includes a condenser (241) and a cooler, the cooler being used to cool the condenser (241), and the waste heat recovery unit (20) is configured to control the tube wall temperature of the condenser (241) within a set range via the cooler.

11. The cooking apparatus (100) according to claim 10, characterized in that, The set range is adjusted according to the ambient temperature value. Specifically, when the ambient temperature value is greater than or equal to the fourth temperature value and less than or equal to the fifth temperature value, the set range is a preset range; when the ambient temperature value is less than the fourth temperature value, the set range is lowered by a first floating value compared to the preset range; when the ambient temperature value is greater than the fifth temperature value, the set range is higher than the preset range by a second floating value.

12. The cooking apparatus (100) according to claim 11, characterized in that, The fourth temperature value is 15℃, and the fifth temperature value is 30℃; and / or, the first floating value is greater than or equal to 2℃ and less than or equal to 4℃; and / or, the second floating value is greater than or equal to 3℃ and less than or equal to 5℃; and / or, the preset range is within the range of greater than or equal to 25℃ and less than or equal to 40℃.

13. The cooking apparatus (100) according to any one of claims 10-12, characterized in that, The set range is greater than or equal to 25°C and less than or equal to 40°C; And / or, the cooler is configured to cool the condenser (241) at constant pressure using cooling water.

14. The cooking apparatus (100) according to any one of claims 1-6, characterized in that, The cooking device (100) is configured to control the flue gas to flow to the waste heat recovery unit (20) when the flue gas temperature in the flue gas duct (11) is greater than or equal to a first temperature value, and to control the flue gas to be discharged from the cooking device (100) when the flue gas temperature in the flue gas duct (11) is less than the first temperature value.

15. The cooking apparatus (100) according to any one of claims 1-6, characterized in that, The power generation and energy storage unit (30) includes a generator (31) and an energy storage device (32). The generator (31) is connected to the waste heat recovery unit (20) via a transmission. The energy storage device (32) is electrically connected to the generator (31). The energy storage device (32) includes a battery or a connector for detachably installing the battery.

16. A method for controlling a cooking apparatus (100), wherein the cooking apparatus (100) is the cooking apparatus (100) according to any one of claims 1-15, characterized in that, The control method includes: When the preset conditions are met, the exhaust duct (11) is connected to the waste heat recovery unit (20), and the waste heat recovery unit (20) and the power generation and storage unit (30) are controlled to operate. The preset conditions include that the exhaust temperature of the exhaust duct (11) is greater than or equal to the sixth temperature value.

17. The control method according to claim 16, characterized in that, The preset conditions also include the duration for which the smoke exhaust velocity of the smoke exhaust channel (11) is greater than the first preset velocity for a first preset duration.

18. The control method according to claim 17, characterized in that, The sixth temperature value is greater than or equal to 150°C and less than or equal to 180°C, the first preset flow rate is greater than or equal to 1 m / s and less than or equal to 3 m / s, and the first preset duration is greater than or equal to 3 min and less than or equal to 5 min.

19. The control method according to claim 17, characterized in that, The waste heat recovery unit (20) includes a working fluid pump (21), an evaporator assembly (22), a turbine (23), and a condenser (241). The working fluid pump (21), the evaporator assembly (22), the turbine (23), and the condenser (241) are connected to form a loop for the flow of working fluid. The evaporator assembly (22) is connected to the flue gas duct (11) for heat exchange between the flue gas discharged from the flue gas duct (11) and the working fluid in the loop. The turbine (23) is drivenly connected to the power generation and energy storage unit (30). The control method further includes: after the waste heat recovery unit (20) and the power generation and energy storage unit (30) are running, If the exhaust gas temperature is greater than the seventh temperature value, the waste heat recovery unit (20) is controlled to operate at the maximum working fluid flow rate, and the opening between the exhaust gas channel (11) and the evaporator assembly (22) is 100%; and / or, if the exhaust gas temperature is greater than or equal to the eighth temperature value and less than or equal to the seventh temperature value, the working fluid flow rate of the waste heat recovery unit (20) is dynamically adjusted, and the evaporation temperature of the working fluid in the evaporator assembly is controlled within a predetermined temperature range; and / or, if the exhaust gas temperature is less than the eighth temperature value, the opening between the exhaust gas channel (11) and the evaporator assembly (22) is reduced, and the working fluid temperature in the condenser (241) is raised to the ninth temperature value.

20. The control method according to claim 19, characterized in that, The seventh temperature value is greater than or equal to 200℃ and less than or equal to 300℃; the eighth temperature value is greater than or equal to 150℃ and less than or equal to 165℃; the ninth temperature value is greater than or equal to 4℃ and less than or equal to 6℃; and the predetermined temperature range is greater than or equal to 80℃ and less than or equal to 95℃.

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