Device and method for extracting heat from engine waste heat

Abstract

The present invention relates to the field of environmental protection and energy conservation, and more particularly to a device and method for extracting heat from engine waste heat. The device comprises: a control circuit, a water injection assembly, a heat exchange assembly, and a dedicated heating pot. The water outlet of the water injection assembly is connected to the water inlet of the heat exchange assembly; the control circuit is connected to the water injection assembly and a temperature sensor of the heat exchange assembly, and controls the water injection assembly to inject drinking water into the heat exchange assembly based on the temperature of the heat exchange assembly; the temperature sensor is connected to the heat exchange assembly to obtain the temperature value of the heat exchange assembly; and the heat exchange assembly is connected to the dedicated heating pot via a high-temperature resistant hose to provide high-temperature steam to the dedicated heating pot. The device extracts waste heat from the exhaust pipe of an operating vehicle or marine engine, automatically and intelligently heating food, which is more environmentally friendly and energy-saving. It can also achieve fully automatic cooking of food without human intervention.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection and energy conservation, and in particular to a device and method for extracting waste heat from an engine. Background Art

[0002] Dining has always been a major issue for transport drivers and self-driving tourists. This is particularly true for long-distance transport and long-distance road trips. Finding a restaurant can alter driving routes, potentially requiring significant detours in remote areas. Furthermore, it can be difficult to eat on time, which can negatively impact health over time.

[0003] In this situation, many people have no choice but to bring their own dry food. But how can dry food compare to a steaming hot meal, especially in the winter in the north, when a bowl of steaming vegetable soup is the most delicious food in the world. Summary of the Invention

[0004] The embodiments of the present invention mainly provide a heat extraction device and method for engine waste heat, that is, extracting the waste heat of the exhaust pipe when a vehicle or marine engine is working, and using the waste heat of the exhaust pipe to automatically and intelligently heat food, thereby overcoming the technical problem that transport vehicle drivers and self-driving tourists are unable to solve the problem of dining by themselves.

[0005] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present invention is as follows: a heat extraction device for engine waste heat is provided, comprising: a control circuit (100), a water injection component (200), a heat exchange component (300) and a dedicated heating pot (400), wherein the water outlet of the water injection component (200) is connected to the water inlet of the heat exchange component (300); the control circuit (100) is electrically connected to the water injection component (200) and a temperature sensor (1) of the heat exchange component (300); the control circuit (100) controls the water injection component (200) to inject drinking water into the heat exchange component (300) according to the temperature of the heat exchange component (300); the temperature sensor (1) is connected to the heat exchange component (300) to obtain the temperature value of the heat exchange component (300); the heat exchange component (300) is connected to the dedicated heating pot (400) via a high-temperature resistant hose to provide high-temperature steam to the dedicated heating pot (400).

[0006] Optionally, the heat exchange component (300) is installed outside the exhaust pipe where the surface temperature of the exhaust pipe is in the range of 300°C to 800°C when the engine is working.

[0007] Optionally, the heat exchange assembly (300) comprises: the temperature sensor (1), the water injection atomizing device (2), the temperature sensor signal line (3), the water inlet (4), the water injection pipe (5), the thermal insulation layer (6), the water spray prevention baffle (7), the steam outlet (8), the steam outlet pipe (9) and the heat exchange chamber (10); the temperature sensor (1) is installed on the upper part of the heat exchange chamber (10) near the side of the water injection pipe (5) for obtaining the temperature of the heat exchange chamber (10); the temperature sensor signal line (3) of the temperature sensor (1) passes through the thermal insulation layer (6) and is connected to the The control circuit (100) is provided; the water injection pipe (5) is fixed to the upper part of the water inlet (4) of the heat exchange component (300); the water injection atomizing device (2) is fixed to the lower part of the water inlet (4) of the heat exchange component (300); the water spray prevention baffle (7) is installed at the lower part of the steam outlet (8) to prevent unvaporized drinking water from entering the steam outlet (8); the steam outlet pipe (9) is fixed to the upper part of the steam outlet (8) of the heat exchange component (300) to lead out the high-temperature steam generated in the heat exchange cavity (10) through the steam outlet pipe (9).

[0008] Optionally, the side panels of the heat exchange cavity (10) are welded and sealed to the outer wall of the engine exhaust pipe to form the heat exchange cavity (10); the thermal insulation layer (6) is in close contact with the outer wall (12) of the heat exchange box of the heat exchange cavity (10) to prevent heat loss.

[0009] Optionally, the heat exchange assembly (300) further comprises: a water inlet tee (24), a fixing clamp (25), a steam outlet tee (26), a heat conducting plate (27), a left heat exchange box (28) and a right heat exchange box (29); the heat exchange assembly (300) is composed of the left heat exchange box (28) and the right heat exchange box (29) connected by the water inlet tee (24) and the steam outlet tee (26), and is fixed to the outside of the engine exhaust pipe (13) by the fixing clamp (25).

[0010] Optionally, the heat conducting sheet (27) is installed between the heat exchange assembly (300) and the engine exhaust pipe (13); the left heat exchange box (28) and the right heat exchange box (29) are symmetrical in structure; and the temperature sensor (1) is fixedly installed on the upper side of the left heat exchange box (28) or the right heat exchange box (29), close to the water injection pipe (5).

[0011] Optionally, the anti-spray baffle (7) is fixedly mounted on the lower portion of the steam outlet (8); the steam outlet pipe (9) is threadedly fixed to the upper portion of the steam outlet (8) of the heat exchange component (300); and the thermal insulation layer (6) is tightly wrapped and fixed to the heat exchange component (300).

[0012] Optionally, the water outlet of the water injection assembly (200) is fixedly connected to the water inlet tee of the heat exchange assembly (300) via a hose.

[0013] Optionally, the high-temperature steam hose (18) of the dedicated heating pot (400) is sealedly connected to the steam outlet pipe (9) or the steam outlet tee (26) of the heat exchange component (300). Optionally, the dedicated heating pot (400) comprises: a pressure cooker safety valve (14), a pressure cooker air release valve (15), a steam inlet pipe (16), a steam pipe joint (17), a high-temperature resistant steam hose (18), a pressure cooker air inlet (19), a pressure cooker upper cover (20), a pressure cooker pot body (21) and a steam soft conduit (22); one end of the steam inlet pipe (16) is fixed to the upper part of the pressure cooker air inlet (19), and the other end is fixedly connected to the male end of the steam pipe joint (17); the steam pipe joint (1 7) is sealedly connected to the high-temperature resistant steam hose (18), and the steam soft conduit (22) is fixed to the lower part of the pressure cooker air inlet (19); the lower opening of the steam soft conduit (22) is 3-10 cm away from the bottom of the pressure cooker body (21) for heat exchange; the pressure cooker safety valve (14) is fixedly installed on the pressure cooker upper cover (20) for releasing the internal pressure of the dedicated heating pot (400) when the internal pressure of the dedicated heating pot (400) exceeds a preset threshold.

[0014] In order to solve the above technical problems, another technical solution adopted in an embodiment of the present invention is: providing a heating method of a heat extraction device using the above engine waste heat, the method comprising: under the control of a control circuit (100), using an intermittent water supply method, performing a water injection process of 2 to 5 seconds every 40 to 60 seconds; the water injection component (200) keeps the heat exchange component (300) supplying steam to the dedicated heating pot (400), so that the food exchanges heat with the heat exchange component (300); when the timer time for injecting water to heat the food is reached, the water injection component (200) stops injecting water, the heat exchange component (300) no longer generates high-temperature steam, and the food cooking is completed, and the control circuit (100) reminds the user that the food cooking is completed through sound and light signals.

[0015] The present invention provides a heat extraction device and method for engine waste heat, which extracts waste heat from the exhaust pipe when a vehicle or marine engine is in operation. On the one hand, the waste heat from the exhaust pipe is used to automatically and intelligently heat food without consuming other energy sources, which is more environmentally friendly and energy-saving. On the other hand, the device of the present invention can realize fully automatic cooking of food, and the cooking process does not require human intervention, providing a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural block diagram of a heat extraction device for engine waste heat provided by an embodiment of the present invention;

[0017] Figure 2 is a three-dimensional cross-sectional view of a special heating pot provided by one embodiment of the present invention;

[0018] Figure 3 is a planar structural diagram of a heat exchange assembly provided by one embodiment of the present invention;

[0019] Figure 4 is a three-dimensional cross-sectional view of a heat exchange assembly provided by one embodiment of the present invention;

[0020] Figure 5 is a three-dimensional cross-sectional view of a heat exchange assembly provided by another embodiment of the present invention;

[0021] Figure 6 It is a schematic structural diagram of a heat exchange component provided by another embodiment of the present invention without a thermal insulation layer. DETAILED DESCRIPTION

[0022] In order to make the objects, solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0023] The embodiment of the present invention first provides a heat extraction device for engine waste heat, such as Figure 1 As shown, it includes: a control circuit 100, a water injection component 200, a heat exchange component 300 and a dedicated heating pot 400.

[0024] The water outlet of the water injection component 200 is fixedly connected to the water inlet of the heat exchange component 300 through a hose; according to the instructions of the control circuit 100, drinking water is injected into the heat exchange component 300 for 3 seconds every 50 seconds; the heat exchange component 300 is movably and sealedly connected to the special heating pot 400; the steam generated by the heat exchange component 300 enters the special heating pot 400 through the high-temperature resistant steam hose 18; the temperature sensor 1 of the heat exchange component 300 is connected to the control circuit 100 to provide temperature information of the heat exchange component 300.

[0025] The following is a detailed description of the structures of the heat exchange component 300 and the dedicated heating pot 400 in the heat extraction device for the engine waste heat. First, please refer to Figure 3 and Figure 4 , Figure 3 and Figure 4 is a structural diagram of the heat exchange component 300, as shown in Figure 3 and Figure 4 As shown, the heat exchange assembly 300 includes:

[0026] Temperature sensor 1, water injection atomization device 2, temperature sensor signal line 3, water inlet 4, water injection pipe 5, insulation layer 6, anti-spray baffle 7, steam outlet 8, steam outlet pipe 9 and heat exchange cavity 10.

[0027] The temperature sensor 1 is fixedly mounted on the upper side of the shell of the heat exchange chamber 10 , close to the water injection pipe 5 , and is used to obtain the temperature of the heat exchange chamber 10 .

[0028] The temperature sensor signal line 3 of the temperature sensor 1 passes through the insulation layer 6 and is led out of the heat exchange component and connected to the control circuit 100 .

[0029] The water injection pipe 5 is threadedly fixed to the upper part of the water inlet 4 of the heat exchange component 300, and the water injection atomization device 2 is threadedly fixed to the lower part of the water inlet 4 of the heat exchange component. The high-pressure injected drinking water will be atomized into small water droplets by the water atomization device 2 and then enter the heat exchange cavity 10, which is conducive to rapid vaporization.

[0030] A water-spraying baffle 7 is fixedly mounted below the steam outlet 8, preventing unvaporized drinking water from entering the outlet. A steam outlet pipe 9 is threadedly secured to the heat exchange assembly above the outlet 8. High-temperature steam generated within the heat exchange chamber 10 is channeled through the steam outlet pipe 9. The side panels of the heat exchange chamber 10 are welded and sealed to the outer wall of the engine exhaust pipe 13, forming the heat exchange chamber and drawing heat from the engine exhaust pipe 13. An insulation layer 6 is tightly wrapped around the outer wall 12 of the heat exchange box within the heat exchange chamber 10 to prevent heat loss.

[0031] See also Figure 2 , Figure 2 Schematic diagram of the structure of the dedicated heating pot 400, such as Figure 2 As shown, the dedicated heating pot 400 includes:

[0032] Pressure cooker safety valve 14, pressure cooker air release valve 15, steam inlet pipe 16, steam pipe joint 17, high temperature resistant steam hose 18, pressure cooker air inlet 19, pressure cooker upper cover 20, pressure cooker pot body 21 and steam soft pipe 22.

[0033] One end of the steam inlet pipe 16 is threadedly fixed to the upper part of the pressure cooker air inlet 19 of the pressure cooker upper cover 18, and the other end is fixedly connected to the male end of the steam pipe joint 17; the female end of the steam pipe joint 17 is sealed with the high-temperature resistant steam hose 18.

[0034] In some embodiments, the steam pipe connector 17 may be a quick-connect structure, using a quick-connect connector for easy assembly and use.

[0035] The steam flexible conduit 22 is fixed to the lower part of the pressure cooker air inlet 19. The lower opening of the steam flexible conduit 22 is 3-10 cm away from the bottom of the pressure cooker body 21. The high-temperature steam generated by the heat exchange component 300 is introduced into the bottom of the pressure cooker body 21, which is beneficial to heat exchange.

[0036] After the high-temperature steam generated by the heat exchange component 300 enters the dedicated adding pot 400, the pressure gradually increases. After reaching the designed pressure of the dedicated adding pot 400, the high-pressure steam begins to deflate through the relief valve 15, so that the high-pressure steam continuously enters the dedicated adding pot 400 and performs heat exchange inside the dedicated adding pot 400 to heat the food inside the dedicated adding pot 400; the pressure cooker safety valve 14 is fixedly installed on the pressure cooker cover 18, and is used to release the internal pressure when the internal pressure of the dedicated adding pot 400 is too high.

[0037] The cooking process is described in detail below through a specific embodiment.

[0038] Before starting to cook, put the cleaned ingredients into the pressure cooker body 21, tighten the pressure cooker cover 18, connect the high-temperature resistant steam hose 18 through the steam pipe connector 17, and fill the water tank with drinking water for use.

[0039] When cooking is needed, a cooking command can be issued via the remote control. Upon receiving the cooking command, the control circuit 100 first detects the temperature of the heat exchange chamber 10 via the temperature sensor 1. The heat exchange chamber 10 draws heat from the engine exhaust pipe 13. If the temperature has not reached 180°C, the system waits for the temperature of the heat exchange chamber 10 to rise above 180°C. If the temperature reaches or exceeds 180°C, the system begins the timed process of injecting water to heat the food.

[0040] Under the control of the control circuit 100, the water injection assembly 200 performs a 3-second water injection operation every 50 seconds. During this 3-second period, the booster pump and solenoid valve are turned on, and the drinking water in the water tank is atomized into small water droplets through the water injection pipe 5 and the water injection atomization device 2. After entering the heat exchange chamber 10, it provides the water required for conversion into water vapor in the heat exchange chamber 10 for the next 50 seconds, ensuring that the heat exchange tank continuously provides a sufficient amount of high-temperature steam to the dedicated heating pot.

[0041] High-temperature steam enters the dedicated heating pot through the high-temperature resistant steam hose 18, the steam pipe joint 17, and the steam inlet pipe 16, is guided to the bottom of the pressure cooker body 21 by the steam flexible conduit 22, and then rushes out of the dedicated heating pot from the upper pressure cooker air relief valve 15, which is conducive to sufficient heat exchange with the food, thereby quickly heating the food and completing the cooking process.

[0042] When the timer for heating food with water (for example, 25 minutes) is reached, the water injection component 200 stops injecting water, the heat exchange component 300 no longer generates high-temperature steam, and the food cooking is completed. The control circuit 100 reminds the user that the food cooking is completed through sound and light signals.

[0043] Another embodiment of the present invention further provides a heat extraction device for engine waste heat. The difference between the heat extraction device and the heat extraction device for engine waste heat in the above embodiment is that the structure of the heat exchange component 300 is different.

[0044] See also Figure 5 and Figure 6 , Figure 5 and Figure 6 The structure of the heat exchange assembly 300 with and without the insulation layer 6 is shown schematically. Figure 5 and Figure 6 As shown, the heat exchange component 300 includes the temperature sensor 1, the water injection atomization device 2, the temperature sensor signal line 3, the water inlet 4 ( Figure 4 and Figure 5 Not shown), water injection pipe 5, insulation layer 6, anti-spray baffle 7, steam outlet 8 ( Figure 4 and Figure 5 In addition to the steam outlet pipe 9, the heat exchanger 24 also includes a water inlet tee 24, a fixing clamp 25, a steam outlet tee 26, a heat conducting plate 27, a left heat exchange box 28 and a right heat exchange box 29.

[0045] The water outlet of the water injection assembly 200 is fixedly connected to the water inlet tee 24 of the heat exchange assembly 300 via a flexible hose. Under the control of the control circuit 100, the water injection assembly 200 injects drinking water into the heat exchange assembly 300 for 3 seconds every 50 seconds. The steam outlet tee 26 of the heat exchange assembly 300 is movably and sealedly connected to the steam inlet pipe 16 of the dedicated heating pot 400 via a high-temperature resistant steam hose 18. The steam generated by the heat exchange assembly 300 enters the dedicated heating pot through the high-temperature resistant steam hose 18. The temperature sensor 1 of the heat exchange assembly 300 is connected to the control circuit 100 to provide temperature information of the heat exchange assembly 300.

[0046] In the embodiment of the present invention, the left heat exchange box 28 and the right heat exchange box 29 are symmetrical structures, and all components are symmetrical and identical except for the temperature sensor 1 and the temperature sensor signal line 3. Only the left heat exchange box 28 will be described below.

[0047] The water injection pipe 5 is threadedly fixed to the upper part of the water inlet 4 of the left heat exchange box 28; the water injection atomization device 2 is threadedly fixed to the lower part of the water inlet 4 of the left heat exchange box 28, and the high-pressure injected drinking water will be atomized into small water droplets by the water atomization device 2 and then enter the interior of the left heat exchange box 28, which is conducive to rapid vaporization; the anti-spray baffle 7 is fixedly installed at the lower part of the steam outlet 8 to prevent unvaporized drinking water from entering the steam outlet 8; the steam outlet pipe 9 is threadedly fixed to the upper part of the steam outlet 8 of the heat exchange component, and the high-temperature steam generated in the left heat exchange box 28 is led out through the steam outlet pipe 9.

[0048] The temperature sensor 1 is fixedly installed on the upper side of the outer shell of the left heat exchange box 28, close to the water injection pipe 5, and is used to obtain the temperature of the left heat exchange box 28; the temperature sensor signal line 3 of the temperature sensor 1 passes through the insulation layer 6 and leads out of the heat exchange component and is connected to the control circuit 100.

[0049] The inner wall 11 of the heat exchange box 28 on the left and the heat exchange box 29 on the right are fixedly installed close to the outer wall of the engine exhaust pipe 13 through the heat conducting sheet 27, so as to obtain heat from the engine exhaust pipe 13; the left heat exchange box 28 and the right heat exchange box 29 are fixed to the outside of the engine exhaust pipe 13 through the fixing clamp 25; the water inlet tee 24 merges the water injection pipe 5 of the left heat exchange box 28 and the right heat exchange box 29 together; the steam outlet tee 26 merges the steam outlet pipe 9 of the left heat exchange box 28 and the right heat exchange box 29 together.

[0050] The heat-insulating layer 6 is tightly wrapped and fixed against the outer walls 12 of the left heat exchange box 28 and the right heat exchange box 29 to prevent heat loss.

[0051] The cooking process is described in detail below through another specific embodiment.

[0052] Before starting to cook, put the cleaned ingredients into the pressure cooker body 21, tighten the pressure cooker cover 18, and connect the high-temperature resistant steam hose 18 through the steam pipe connector 17. Fill the water tank with drinking water for use.

[0053] When food needs to be cooked, a cooking command can be issued via the remote control. After receiving the cooking command, the control circuit 100 first detects the temperature of the left heat exchange box 28 via the temperature sensor 1. If the temperature does not reach 180 degrees Celsius, the control circuit 100 waits for the temperature of the left heat exchange box 28 to rise above 180 degrees Celsius. If the temperature reaches or exceeds 180 degrees Celsius, the timed process of injecting water to heat the food begins.

[0054] Under the control of the control circuit, the water injection assembly 200 performs a 3-second water injection operation every 50 seconds. During this 3-second period, the booster pump and solenoid valve are turned on, and the drinking water in the water tank is atomized into small water droplets through the water injection pipe 5 and the water injection atomization device 2. After entering the left and right heat exchange boxes 28 and 29, the water is provided for conversion into water vapor in the left and right heat exchange boxes 28 and 29 for the next 50 seconds, ensuring that the left and right heat exchange boxes 28 and 29 continuously provide sufficient high-temperature steam to the dedicated heating pot 400.

[0055] High-temperature steam enters the dedicated heating pot 400 through the high-temperature resistant steam hose 18, the steam pipe joint 17, and the steam inlet pipe 16, is guided to the bottom of the pressure cooker body 21 by the steam soft conduit 22, and then rushes out of the dedicated heating pot from the upper pressure cooker air relief valve 15, which is conducive to sufficient heat exchange with the food, thereby quickly heating the food and completing the cooking process.

[0056] When the timer for heating food with water (for example, 25 minutes) is reached, the water injection component 200 stops injecting water, the heat exchange component 300 no longer generates high-temperature steam, and the food cooking is completed. The control circuit 100 reminds the user that the food cooking is completed through sound and light signals.

[0057] The above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat extraction device for engine waste heat, characterized in that: include: A control circuit (100), a water injection component (200), a heat exchange component (300) and a dedicated heating pot (400), The water outlet of the water injection component (200) is connected to the water inlet of the heat exchange component (300); The control circuit (100) is electrically connected to the water injection component (200) and the temperature sensor (1) of the heat exchange component (300), and the control circuit (100) controls the water injection component (200) to inject drinking water into the heat exchange component (300) according to the temperature of the heat exchange component (300); The temperature sensor (1) is connected to the heat exchange component (300) and is used to obtain the temperature value of the heat exchange component (300); the heat exchange component (300) is installed on the outside of the exhaust pipe, where the surface temperature of the exhaust pipe is in the range of 300°C to 800°C when the engine is working; The heat exchange assembly (300) comprises: the temperature sensor (1), a water injection atomizing device (2), a temperature sensor signal line (3), a water inlet (4), a water injection pipe (5), a thermal insulation layer (6), a water spray prevention baffle (7), a steam outlet (8), a steam outlet pipe (9), and a heat exchange cavity (10); The temperature sensor (1) is installed on the upper side of the heat exchange cavity (10) near the water injection pipe (5) and is used to obtain the temperature of the heat exchange cavity (10); The temperature sensor signal line (3) of the temperature sensor (1) passes through the thermal insulation layer (6) and is connected to the control circuit (100); The water injection pipe (5) is fixed to the upper portion of the water inlet (4) of the heat exchange component (300); The water injection atomizing device (2) is fixed to the lower part of the water inlet (4) of the heat exchange component (300); The water spray prevention baffle (7) is installed at the lower part of the steam outlet (8) to prevent unvaporized drinking water from entering the steam outlet (8); The steam outlet pipe (9) is fixed to the upper portion of the steam outlet port (8) of the heat exchange component (300) and is used to lead out the high-temperature steam generated in the heat exchange cavity (10) through the steam outlet pipe (9).

2. The heat extraction device according to claim 1, characterized in that The side panels of the heat exchange cavity (10) are welded and sealed to the outer wall of the engine exhaust pipe, thereby forming the heat exchange cavity (10); The heat-insulating layer (6) is in close contact with the outer wall (12) of the heat exchange box of the heat exchange cavity (10) to prevent heat loss; The heat exchange component further comprises a water injection atomizing device (2), which is fixed to the lower part of the water inlet (4) of the heat exchange component (300) and is used to atomize the high-pressure injected drinking water into small water droplets to enter the heat exchange cavity (10).

3. The heat extraction device according to claim 1, characterized in that The heat exchange assembly (300) comprises: a water inlet tee (24), a fixed clamp (25), a steam outlet tee (26), a heat conducting sheet (27), a left heat exchange box (28) and a right heat exchange box (29); The heat exchange assembly (300) is composed of a left heat exchange box (28) and a right heat exchange box (29) connected by a water inlet tee (24) and a steam outlet tee (26), and is fixed to the outside of the engine exhaust pipe (13) by a fixing hoop (25).

4. The heat extraction device according to claim 3, characterized in that The heat conducting sheet (27) is installed between the heat exchange component (300) and the engine exhaust pipe (13); The left heat exchange box (28) and the right heat exchange box (29) are symmetrical in structure; The temperature sensor (1) is fixedly installed on the upper side of the left heat exchange box (28) or the right heat exchange box (29), close to the water injection pipe (5).

5. The heat extraction device according to claim 1, characterized in that The anti-spray baffle (7) is fixedly installed at the lower part of the steam outlet (8); The steam outlet pipe (9) is fixed to the upper portion of the steam outlet (8) of the heat exchange component (300); The thermal insulation layer (6) is tightly wrapped around and fixed to the heat exchange component (300).

6. The heat extraction device according to claim 3, characterized in that The water outlet of the water injection assembly (200) is fixedly connected to the water inlet tee of the heat exchange assembly (300) via a hose; The high-temperature steam generated by the heat exchange component (300) is led out through the steam outlet tee (26).

7. The heat extraction device according to claim 3, characterized in that The special heating pot (400) comprises: a pressure cooker safety valve (14), a pressure cooker air release valve (15), a steam inlet pipe (16), a steam pipe joint (17), a high-temperature resistant steam hose (18), a pressure cooker air inlet (19), a pressure cooker upper cover (20), a pressure cooker body (21) and a steam hose (22); One end of the steam inlet pipe (16) is fixed to the upper portion of the pressure cooker air inlet (19), and the other end is fixedly connected to the male end of the steam pipe joint (17); The female end of the steam pipe joint (17) is sealedly connected to the high-temperature resistant steam hose (18), and the high-temperature resistant steam hose (18) is sealedly connected to the steam outlet pipe (9) or the steam outlet tee (26) of the heat exchange component (300); The steam flexible conduit (22) is fixed to the lower portion of the pressure cooker air inlet (19); the lower opening of the steam flexible conduit (22) is 3-10 cm away from the bottom of the pressure cooker body (21) for heat exchange; The pressure cooker safety valve (14) is fixedly mounted on the pressure cooker upper cover (20) and is used to release the internal pressure of the dedicated heating pot (400) when the internal pressure of the dedicated heating pot (400) exceeds a preset threshold.

8. A heating method using the heat extraction device for waste heat from an engine as claimed in any one of claims 1 to 7, characterized in that: include: Under the control of the control circuit (100), an intermittent water supply method is adopted, and a water injection process of 2 to 5 seconds is performed every 40 to 60 seconds; The water injection component (200) maintains the heat exchange component (300) to provide steam to the dedicated heating pot (400), so that the food can exchange heat with the heat exchange component (300); When the timing of injecting water to heat food arrives, the water injection component (200) stops injecting water, the heat exchange component (300) no longer generates high-temperature steam, and food cooking is completed. The control circuit (100) reminds the user that food cooking is completed through sound and light signals.

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