An air purification system and control method based on automobile engine waste heat regeneration

Abstract

The present invention relates to an air purification system based on automobile engine waste heat regeneration and a control method thereof. The air purification system comprises an air intake manifold connected to an air intake port and an air outlet manifold connected to an air outlet. The air intake manifold is bifurcated in one direction to form two purification branches. The left and right purification branches are connected to the air intake manifold at their other ends and then connected to the air outlet manifold. The left and right purification branches are connected to the air intake manifold and the air intake branch, respectively, via a two-position three-way reversing valve. The purification device comprises an organic matter filter device. The purification branch is connected to a heat outlet device. An air outlet valve is provided on the purification branch. An organic matter concentration sensor for measuring the concentration of organic matter is provided in the air outlet manifold. The present invention provides an air purification system based on automobile engine waste heat regeneration that can filter organic matter, is provided with two organic matter filters that can be cyclically replaced for filtration, and can utilize automobile engine waste heat to heat and desorb the organic matter filter device when the organic matter filter device is saturated.

Description

Technical Field

[0001] The present invention relates to an automobile air purification system, and in particular to an air purification system based on automobile engine waste heat regeneration and a control method. Background Art

[0002] To improve in-vehicle air quality, many automotive air purification systems have been developed. For example, Chinese Patent Publication No. CN108248343A discloses an air purifier for an automotive air purification system, characterized in that: the air purifier specifically includes a monitoring device and a purifier device; the monitoring device includes a pollutant concentration monitoring module, a vehicle startup monitoring module, a storage module, a display module, and a controller module; the purifier device includes a housing, at least one air inlet and at least one air outlet disposed on the housing, at least one fan, and a filter element; the smart terminal is communicatively connected to the air purifier; and the air purifier's monitoring device is communicatively connected to the purifier device. The filter element includes a HEPA filter layer, an activated carbon filter layer, an electrostatic adsorption layer, a honeycomb antibacterial filter layer, and a fragrance layer.

[0003] Chinese patent publication number CN107650629A discloses a vehicle-mounted air purifier comprising: a cigarette lighter power plug that plugs into the cigarette lighter jack on the vehicle's center console; a purifier housing, which is a long rectangular shape with air outlets on both sides; a purifier housing cover, which is provided with an air inlet; a purifier filter, which is disposed beneath the cover within the purifier housing; and two fans, which are horizontally disposed beneath the purifier filters and electrically connected to the cigarette lighter power plug. The purifier filters comprise an upper activated carbon filter, a middle HEPA filter, and a lower sterilizing filter.

[0004] Based on the above patents, currently the filtration and purification of organic matter in the car are all achieved through activated carbon. However, there is a technical problem that due to the limited adsorption capacity of activated carbon materials, the life cycle of such vehicle-mounted filtering devices is short, and after reaching a saturated state, they can only be replaced and cannot be regenerated. Summary of the Invention

[0005] The present invention mainly solves the technical problems in the prior art that the activated carbon filter device has a short life cycle and can only be replaced but not regenerated after being in a saturated state. It provides an air purification system based on automobile engine waste heat regeneration that can filter organic matter, and is equipped with a dual-channel filter device for cyclic replacement filtration. When the organic matter filter device is in a saturated state, the organic matter filter device can be heated and desorbed by using the waste heat of the automobile engine.

[0006] In order to solve the above technical problems and achieve the above invention objectives, the present invention provides an air purification system based on automobile engine waste heat regeneration, including an air purification device and a heat outlet device, characterized in that the purification device includes an air intake manifold connected to the air inlet and an air outlet manifold connected to the air outlet, the air intake manifold is close to one end of the air outlet manifold and is bifurcated to form a double purification branch pipe, one end of the left and right purification branch pipes is connected to the air intake manifold, and the other end is connected to the air outlet manifold after being combined, and the left and right purification branch pipes are respectively connected through two-position three-position air purifiers. The reversing valve is respectively connected to the intake main pipe and the intake branch pipe. The purification device includes an organic matter filtering device arranged in the purification branch pipe. The purification branch pipe is connected to the heat outlet device. The purification branch pipe is provided with an outlet valve. An organic matter concentration sensor for measuring the concentration of organic matter is provided in the outlet main pipe and / or in the vehicle. The organic matter concentration sensor is connected to a control module provided with an organic matter concentration limit value and / or an organic matter concentration multiple value. The control module is connected to the heat outlet device, the two-position three-way reversing valve and the outlet valve.

[0007] As an air purification system based on automobile engine waste heat regeneration of the present invention, a circulation branch is sealed between the left and right purification branches. The organic matter filtering device is centrally arranged in the purification branch to divide the purification branch into a front purification branch connected to the intake manifold and a rear purification branch connected to the outlet manifold. The heat outlet device is arranged in the front purification branch. The front purification branch is provided with a circulation heating valve, and the rear purification branch is provided with the outlet valve. The circulation heating valve, the heat outlet device and the outlet valve are arranged in sequence from the intake manifold to the outlet manifold. The circulation branch communicates with the front purification branch and the rear purification branch on the same side through the circulation heating valve and the outlet valve on the same side to form a circulation heating channel. The circulation branch is provided with a pollutant exhaust valve. A temperature sensor is provided in the purification branch. The temperature sensor is connected to the control module with a temperature limit value. The control module is provided with a timing device with a time threshold. The control module is connected to the circulation heating valve.

[0008] As an air purification system based on automobile engine waste heat regeneration of the present invention, the heat output device is a plate-fin heat exchanger, the fluid inlet pipe of the plate-fin heat exchanger is connected to the coolant outlet pipe of the engine or the exhaust pipe, the fluid outlet pipe of the plate-fin heat exchanger is connected to the coolant inlet pipe or exhaust pipe of the engine, the gas outlet pipe of the plate-fin heat exchanger is arranged toward the organic matter filtering device, the gas inlet pipe of the plate-fin heat exchanger is arranged on the side of the circulating heating valve away from the intake manifold, the fluid inlet pipe is provided with a fluid control valve for controlling the inflow of fluid, and the fluid control valve is connected to the control module.

[0009] As an air purification system based on automobile engine waste heat regeneration of the present invention, the organic matter filtering device is an activated carbon filtering device, and the circulating heating valve, pollutant exhaust valve and outlet valve are all one-way valves.

[0010] As an air purification system based on automobile engine waste heat regeneration of the present invention, the purification device also includes a primary purification device arranged in the intake manifold, and the primary purification device includes a coarse-effect filter and a PM2.5 filter arranged in sequence from the air inlet to the purification branch pipe.

[0011] As an air purification system based on automobile engine waste heat regeneration of the present invention, a blower is provided in the pre-purification branch pipe between the circulating heating valve and the heat outlet device on the same side, and an air collecting hood is connected to the gas inlet pipe. The air collecting hood is provided on the side of the blower close to the heat outlet device.

[0012] As an air purification system based on automobile engine waste heat regeneration of the present invention, a fresh air valve is provided on the purification branch pipe on the side of the blower away from the heat outlet device, and the fresh air valve is connected to the control module.

[0013] In order to solve the above technical problems and achieve the above invention objectives, the present invention provides a control method for an air purification system based on automobile engine waste heat regeneration, comprising the following control process:

[0014] The two-position three-way reversing valves on both sides of the purification branch pipe are used to ventilate and purify the left purification branch pipe, and the right purification branch pipe is closed. The organic matter concentration sensor is used to monitor the organic matter concentration at the outlet main pipe in real time.

[0015] The detection data is sent in real time to a control module that is provided with an organic matter concentration limit value and / or an organic matter concentration multiple value. The control module compares the organic matter concentration at the outlet main pipe detected by the organic matter concentration sensor with the organic matter concentration limit value and / or the organic matter multiple concentration value in the control module. When the outlet main pipe concentration detected by the organic matter concentration sensor is greater than the concentration limit value in the control module and / or the ratio of the organic matter concentration in the outlet main pipe to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module, it indicates that the activated carbon filter device in the left purification branch pipe is in a saturated state. The control module then controls the two-position three-way reversing valves on both sides of the purification branch pipe, closing the left purification branch pipe for temperature desorption and opening the right purification branch pipe for organic matter filtration.

[0016] While closing the left purification branch pipe, open the fluid control valve on the left plate-fin heat exchanger to allow coolant or exhaust gas to flow into the plate-fin heat exchanger. At the same time, the blower blows cold air toward the air collection hood and into the left plate-fin heat exchanger. The coolant or exhaust gas exchanges heat with the air, and the heated air is sprayed toward the activated carbon filter device for temperature rise and desorption.

[0017] The control module then opens the air outlet valve and the circulating heating valve on the left purification branch pipe. The heated air is sprayed from the plate-fin heat exchanger to the activated carbon filter device, then enters the post-purification branch pipe, and then enters the circulation branch pipe through the air outlet valve on the post-purification branch pipe. From the circulation branch pipe, it passes through the circulating heating valve and enters the pre-purification branch pipe. Finally, driven by the blower, the air re-enters the plate-fin heat exchanger and is heated by the plate-fin heat exchanger before being sprayed back to the activated carbon filter device, thus achieving circulating heating of the activated carbon filter device.

[0018] At the same time, the temperature sensor detects the temperature of the purification branch pipe on the left and sends the detected temperature value to the control module in real time. The control module compares the temperature value detected by the temperature sensor with the temperature limit value in the control module. When the detected temperature value is greater than the temperature limit value in the control module, the timing device in the control module starts timing. When the detected temperature value is less than the temperature limit value in the control module, the timing device in the control module pauses timing until the detected temperature value is greater than the temperature limit value in the control module and then resumes timing.

[0019] When the timing time of the timing device reaches the time threshold in the timing device, the timing device is reset to zero, and the control module closes the circulating heating valve of the left purification branch and the fluid control valve of the heat exchanger, and opens the pollutant exhaust valve and fresh air valve of the left purification branch. The outside air is introduced through the fresh air valve and blown to the plate-fin heat exchanger through the blower, and enters the activated carbon filter device through the plate-fin heat exchanger, and then enters the post-purification branch, and then enters the circulation branch through the air outlet valve on the post-purification branch, and finally is discharged through the pollutant exhaust valve on the circulation branch, and at the same time takes out the pollutants generated during the temperature rise and desorption. After exhausting for a period of time, the control module controls the closing of the pollutant exhaust valve, the air outlet valve and the fresh air valve. From then on, the temperature rise and desorption of the activated carbon filter device are completed and it is ready for standby.

[0020] When the organic matter concentration sensor detects that the concentration of the exhaust manifold is greater than the concentration limit value in the control module and / or the ratio of the organic matter concentration in the exhaust manifold to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module, the two-position three-way reversing valve closes the right purification branch pipe, the activated carbon filter device in the purification branch pipe is heated and desorbed, and the left purification branch pipe is opened for filtration, thereby realizing cyclic heating and desorption and cyclic filtration.

[0021] As a control method for an air purification system based on automobile engine waste heat regeneration of the present invention, the organic matter concentration limit value in the control module is 50%-60% of the national standard limit value of indoor total volatile organic compounds, the organic matter concentration multiple value in the control module is 1.5 times-2.0 times, and the temperature limit value in the control module is 55°C-65°C.

[0022] As a control method of the air purification system based on automobile engine waste heat regeneration of the present invention, the time threshold in the timing device is 1.5h-2.5h.

[0023] Compared with the prior art, the air purification system based on automobile engine waste heat regeneration and the control method thereof of the present invention have the following beneficial effects:

[0024] The polluted air is filtered for organic matter, and organic matter filtering devices are simultaneously installed in the left and right purification branch pipes. One of the organic matter filtering devices is selected to filter the organic matter. When the organic matter filtering device is in a saturated state, the other organic matter filtering device is used to filter the organic matter, and the saturated organic matter filtering device is heated and desorbed. In this way, the organic matter filtering and desorption of the saturated filter device are continuously cycled alternately, so that the filter element of the organic matter filtering device does not need to be replaced when it is in a saturated state, thereby extending the service life of the organic matter filtering device;

[0025] The heat source for heating and desorption in a saturated state comes from the waste heat of the engine coolant or the waste heat of the automobile exhaust, which makes full use of the automobile's own energy and is more energy-saving and environmentally friendly.

[0026] An organic matter concentration sensor is used to detect concentrations in the exhaust manifold and / or inside the vehicle. The detected organic matter concentration is used to determine whether the organic matter filter device is in a saturated state. When the detected organic matter concentration is greater than the organic matter concentration threshold value in the control module and / or the ratio of the organic matter concentration in the exhaust manifold to the organic matter concentration inside the vehicle is greater than the organic matter concentration multiple value in the control module, it indicates that the organic matter filter device is in a saturated state and the organic matter filter device should be heated and desorbed.

[0027] The connection between the control module and the two-position three-way reversing valve can switch back and forth between different purification branch ventilation operations. The connection between the control module and the heating device controls the heating and desorption treatment of the organic matter filter device in a saturated state.

[0028] The purpose of setting a temperature sensor in the purification branch pipe and a timing device in the control module is to ensure that the organic matter filter device in a saturated state is heated and desorbed for a certain period of time at a certain temperature to ensure the heating and desorption efficiency;

[0029] The circulation branch pipe is connected to the pre-purification branch pipe and the post-purification branch pipe through the circulation heating valve and the air outlet valve to form a circulation heating channel. The function of the circulation heating channel is to form an air circulation flow to circulate and heat the organic matter filter device to improve the thermal desorption efficiency.

[0030] The purification device also includes a primary purification device arranged in the air intake main pipe. The primary purification device includes a coarse filter and a PM2.5 filter arranged in sequence from the air intake to the purification branch pipe. The function of the primary purification device is to achieve multi-stage purification of polluted air and improve the air purification effect.

[0031] The air purification system can be directly integrated with the existing air circulation system of the car. The system can be implanted before the air is discharged from the existing air circulation system of the car without damaging the original air circulation system of the car.

[0032] A blower is installed in the front purification branch pipe between the circulation heating valve and the heat outlet device on the same side. Its function is to maintain air circulation after the air re-enters the front purification branch pipe through the circulation heating valve, and to offset the resistance of the purification device itself to ensure the flow effect of the gas in the purification mode.

[0033] The gas inlet pipe is connected to an air collecting hood, which is located on the side of the blower close to the heat outlet device. Its function is to allow the air blown to the heat outlet device by the blower to fully enter the heat outlet device through the air collecting hood, thereby improving the heating and desorption effect of the organic matter filtering device.

[0034] Therefore, the present invention has the characteristics of reasonable structure, convenient use, energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Attachment Figure 1 This is a schematic diagram of gas flow during heating and desorption of an air purification system equipped with a temperature sensor and a timing device according to the present invention;

[0036] Attachment Figure 2 This is a schematic diagram of the gas flow direction of pollutants discharged after the air purification system equipped with a temperature sensor and a timing device of the present invention is heated and desorbed;

[0037] Attachment Figure 3 This is a schematic diagram of a circuit for the organic matter filtering device of the present invention during cyclic heating and desorption;

[0038] Attachment Figure 4 This is a schematic diagram of a circuit for discharging pollutants after cyclic heating and desorption of the organic matter filtering device of the present invention;

[0039] Attachment Figure 5 This is a gas flow diagram of the organic matter filtering device of the present invention that directly discharges pollutants after heating and desorption;

[0040] Attachment Figure 6 This is a schematic diagram of a circuit for directly discharging pollutants after the organic matter filtering device of the present invention is heated and desorbed;

[0041] Attachment Figure 7 Schematic diagram of the structure of the heat output device of the present invention.

[0042] Explanation of the part numbers in the figure: 1. Air inlet, 2. Air inlet main pipe, 3. Air outlet, 4. Air outlet main pipe, 5. Two-position three-way reversing valve, 6. Organic matter filter device, 7. Air outlet valve, 8. Organic matter concentration sensor, 9. Control module, 10. Circulation branch pipe, 11. Pre-purification branch pipe, 12. Post-purification branch pipe, 13. Circulation heating valve, 14. Pollutant exhaust valve, 15. Temperature sensor, 16. Timing device, 17. Fluid inlet pipe, 18. Fluid outlet pipe, 19. Gas outlet pipe, 20. Gas inlet pipe, 21. Wind hood, 22. Fluid control valve, 23. Coarse-effect filter, 24. PM2.5 filter, 25. Heating device, 26. Blower, 27. Fresh air valve. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings. Example

[0044] according to Figure 4 、 Figure 5The air purification system shown is based on the regeneration of waste heat from an automobile engine, and includes an air purification device and a heat outlet device, characterized in that the purification device includes an air intake manifold 2 connected to an air inlet 1 and an air outlet manifold 4 connected to an air outlet 3, the air intake manifold 2 is close to one end of the air outlet manifold 4 and is bifurcated to form a double purification branch pipe, one end of the left and right purification branch pipes is connected to the air intake manifold 2, and the other end is connected to the air outlet manifold 4 after being combined, and the left and right purification branch pipes are respectively connected to the air intake manifold 2 through a two-position three-way reversing valve 5. The main gas pipe 2 is connected to the air intake branch pipe, the purification device includes an organic matter filtering device 6 arranged in the purification branch pipe, the purification branch pipe is connected to the heat outlet device, the purification branch pipe is provided with an outlet valve 7, the main gas pipe 4 and / or the vehicle is provided with an organic matter concentration sensor 8 for measuring the organic matter concentration, the organic matter concentration sensor 8 is connected to a control module 9 provided with an organic matter concentration limit value and / or an organic matter concentration multiple value, the control module 9 is connected to the heat outlet device, the two-position three-way reversing valve 5 and the outlet valve 7. The heat extraction device is a plate-fin heat exchanger. Its fluid inlet pipe 17 is connected to the engine's coolant outlet pipe or exhaust pipe, while its fluid outlet pipe 18 is connected to the engine's coolant inlet pipe or exhaust pipe. Its gas outlet pipe 19 is positioned toward the organic matter filter 6. Its gas inlet pipe 20 is located on the side of the circulating heating valve 13 away from the intake manifold 2. A fluid control valve 22 is provided at the fluid inlet pipe 17 to control fluid flow. This fluid control valve 22 is connected to the control module 9. The organic matter filter 6 is an activated carbon filter. The circulating heating valve 13, pollutant exhaust valve 14, and outlet valve 7 are all one-way valves. The purification device also includes a primary purification device located within the intake manifold 2. This primary purification device comprises a coarse filter 23 and a PM2.5 filter 24, arranged sequentially from the air inlet 1 to the purification branch pipe. A blower 26 is installed in the pre-purification branch pipe 11 between the circulating heating valve 13 and the heat outlet device on the same side. An air collecting hood 21 is connected to the gas inlet pipe 20. The air collecting hood 21 is located on the side of the blower 26 closest to the heat outlet device. A fresh air valve is installed on the purification branch pipe on the side of the blower 26 away from the heat outlet device. The fresh air valve is connected to the control module 9.

[0045] The two-position three-way reversing valve 5 on both sides of the purification branch is used to ventilate and purify the left purification branch, and the right purification branch is closed. The organic matter concentration sensor 8 is used to monitor the organic matter concentration at the outlet main pipe 4 in real time, and the detection data is sent in real time to the control module 9 which is provided with the organic matter concentration limit value and / or organic matter concentration multiple value. The control module 9 compares the organic matter concentration at the outlet main pipe 4 detected by the organic matter concentration sensor 8 with the organic matter concentration limit value and / or organic matter concentration multiple value in the control module 9. When the organic matter concentration sensor 8 is detected, the organic matter concentration at the outlet main pipe 4 is detected. When the concentration of the detected gas outlet main pipe 4 is greater than the concentration limit value in the control module 9 and / or the ratio of the organic matter concentration in the gas outlet main pipe 4 to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module 9, it indicates that the organic matter filtering device 6 in the left purification branch is in a saturated state. The control module 9 controls the two-position three-way reversing valve 5 on both sides of the purification branch, closes the left purification branch for temperature rise desorption, opens the right purification branch for organic matter filtering, and opens the fluid control valve 22 on the left heating device 25 while closing the left purification branch. The coolant or exhaust gas flows into the heating device 25, and the outlet valve 7, fresh air valve and blower 26 of the left purification branch are opened. The outside air is introduced through the fresh air valve and then blown to the plate-fin heat exchanger through the blower 26 for heating. After the outside air is heated, it is sprayed to the activated carbon filter device for temperature rise and desorption. After temperature rise and desorption, it enters the post-purification branch 12 and is discharged from the outlet valve 7 on the post-purification branch 12, taking out the pollutants generated during temperature rise and desorption. After a certain period of temperature rise and desorption, the control module 9 simultaneously closes the heating device 25 and the outlet valve 7 for temperature rise and desorption. The organic matter concentration sensor 8 is a volatile organic matter concentration detection device, comprising: at least one sampling probe; a metal oxide semiconductor sensor, wherein the detection air inlet 1 of the sensor is connected to the at least one sampling probe through an air pipe; and an air pump, wherein the air pump is connected to the detection air outlet 3 of the sensor through an air pipe to pump the sample gas into the at least one sampling probe and the metal oxide semiconductor sensor. Example

[0046] according to Figures 1 to 3 and Figure 6The air purification system shown is based on the regeneration of waste heat from an automobile engine, and includes an air purification device and a heat outlet device, characterized in that the purification device includes an air intake manifold 2 connected to an air inlet 1 and an air outlet manifold 4 connected to an air outlet 3, the air intake manifold 2 is close to one end of the air outlet manifold 4 and is bifurcated to form a double purification branch pipe, one end of the left and right purification branch pipes is connected to the air intake manifold 2, and the other end is connected to the air outlet manifold 4 after being combined, and the left and right purification branch pipes are respectively connected to the air intake manifold 2 through a two-position three-way reversing valve 5. The main gas pipe 2 is connected to the air intake branch pipe, the purification device includes an organic matter filtering device 6 arranged in the purification branch pipe, the purification branch pipe is connected to the heat outlet device, the purification branch pipe is provided with an outlet valve 7, the main gas pipe 4 and / or the vehicle is provided with an organic matter concentration sensor 8 for measuring the organic matter concentration, the organic matter concentration sensor 8 is connected to a control module 9 provided with an organic matter concentration limit value and / or an organic matter concentration multiple value, the control module 9 is connected to the heat outlet device, the two-position three-way reversing valve 5 and the outlet valve 7. A circulation branch pipe 10 is enclosed between the purification branch pipe on the left and the purification branch pipe on the right. The organic matter filtering device 6 is centrally arranged in the purification branch pipe to divide the purification branch pipe into a front purification branch pipe 11 connected to the air inlet main pipe 2 and a rear purification branch pipe 12 connected to the air outlet main pipe 4. The heat outlet device is arranged in the front purification branch pipe 11. The front purification branch pipe 11 is provided with a circulation heating valve 13. The rear purification branch pipe 12 is provided with the air outlet valve 7. The circulation heating valve 13 is provided in the direction from the air inlet main pipe 2 to the air outlet main pipe 4. 3. The heat outlet device and the air outlet valve 7, the circulation branch pipe 10 are respectively connected to the pre-purification branch pipe 11 and the post-purification branch pipe 12 on the same side through the circulation heating valve 13 and the air outlet valve 7 on the same side to form a circulation heating channel. The circulation branch pipe 10 is provided with a pollutant exhaust valve 14, and the purification branch pipe is provided with a temperature sensor 15. The temperature sensor 15 is connected to the control module 9 with a temperature limit value. The control module 9 is provided with a timing device 16 with a time threshold. The control module 9 is connected to the circulation heating valve 13. The heat output device is a plate-fin heat exchanger, the fluid inlet pipe 17 of the plate-fin heat exchanger is connected to the coolant outlet pipe of the engine or the exhaust pipe, the fluid outlet pipe 18 of the plate-fin heat exchanger is connected to the coolant inlet pipe or exhaust pipe of the engine, the gas outlet pipe 19 of the plate-fin heat exchanger is arranged toward the organic matter filtering device 6, the gas inlet pipe 20 of the plate-fin heat exchanger is arranged on the side of the circulating heating valve 13 away from the intake manifold 2, and a fluid control valve 22 for controlling the inflow of fluid is provided at the fluid inlet pipe 17, and the fluid control valve 22 is connected to the control module 9.The organic matter filtering device 6 is an activated carbon filtering device, and the circulating heating valve 13, pollutant exhaust valve 14 and outlet valve 7 are all one-way valves. The purification device also includes a primary purification device arranged in the air intake manifold 2, and the primary purification device includes a coarse filter 23 and a PM2.5 filter 24 arranged in sequence from the air inlet 1 to the purification branch. A blower 26 is provided in the pre-purification branch 11 between the circulating heating valve 13 and the heat outlet device on the same side, and an air collecting hood 21 is connected to the gas inlet pipe 20. The air collecting hood 21 is provided on the side of the blower 26 close to the heat outlet device. A fresh air valve is provided on the purification branch on the side of the blower 26 away from the heat outlet device, and the fresh air valve is connected to the control module 9.

[0047] The left purification branch is ventilated and purified using two-position, three-way reversing valves 5 on either side of the purification branch, while the right purification branch is sealed. An organic matter concentration sensor 8 monitors the organic matter concentration at the outlet manifold 4 in real time. This detection data is sent in real time to a control module 9, which has an organic matter concentration threshold and / or organic matter concentration multiple. The control module 9 compares the organic matter concentration at the outlet manifold 4 detected by the organic matter concentration sensor 8 with the organic matter concentration threshold and / or organic matter concentration multiple stored in the control module 9. If the organic matter concentration at the outlet manifold 4 detected by the organic matter concentration sensor 8 exceeds the concentration threshold and / or organic matter concentration multiple stored in the control module 9, and / or the ratio of the organic matter concentration in the outlet manifold 4 to the organic matter concentration inside the vehicle exceeds the organic matter concentration multiple stored in the control module 9, this indicates that the activated carbon filter in the left purification branch is saturated. The control module 9 then controls the two-position, three-way reversing valves 5 on either side of the purification branch, sealing the left purification branch for temperature desorption and opening the right purification branch for organic matter filtration. While closing the left purification branch, the fluid control valve 22 on the left plate-fin heat exchanger is opened to allow coolant or exhaust gas to flow into the plate-fin heat exchanger. Simultaneously, the blower 26 blows cold air toward the air hood 21 and into the left plate-fin heat exchanger. The coolant or exhaust gas exchanges heat with the air, heating the air and spraying it toward the activated carbon filter for heating and desorption. The control module 9 then opens the outlet valve 7 and the circulating heating valve 13 on the left purification branch. The heated air is sprayed from the plate-fin heat exchanger toward the activated carbon filter, then into the post-purification branch 12. It then enters the circulating branch 10 through the outlet valve 7 on the post-purification branch 12. From there, it enters the pre-purification branch 11 through the circulating heating valve 13. Finally, driven by the blower 26, the air re-enters the plate-fin heat exchanger and, after being heated by the plate-fin heat exchanger, is sprayed toward the activated carbon filter, achieving circulating heating of the activated carbon filter. At the same time, the temperature sensor 15 detects the temperature of the purification branch on the left and sends the detected temperature value to the control module 9 in real time. The control module 9 compares the temperature value detected by the temperature sensor 15 with the temperature limit value in the control module 9. When the detected temperature value is greater than the temperature limit value in the control module 9, the timing device 16 in the control module 9 starts timing. When the detected temperature value is less than the temperature limit value in the control module 9, the timing device 16 in the control module 9 pauses timing until the detected temperature value is greater than the temperature limit value in the control module 9 and continues timing.When the timing duration of the timing device 16 reaches the time threshold in the timing device 16, the timing device 16 is reset to zero, and the control module 9 closes the circulating heating valve 13 of the left purification branch and the fluid control valve 22 of the heat exchanger, and opens the pollutant exhaust valve 14 and the fresh air valve of the left purification branch. The outside air is introduced through the fresh air valve 27 and blown to the plate-fin heat exchanger through the blower 26, and enters the activated carbon filter device through the plate-fin heat exchanger, and then enters the post-purification branch 12, and then enters the circulation branch 10 through the air outlet valve 7 on the post-purification branch 12, and finally is discharged through the pollutant exhaust valve 14 on the circulation branch 10, and at the same time takes out the pollutants generated during the temperature rise and desorption. After exhausting for a period of time, the control module 9 controls the closing of the pollutant exhaust valve 14, the air outlet valve 7 and the fresh air valve. From then on, the temperature rise and desorption of the activated carbon filter device are completed and ready for use. When the concentration of the exhaust manifold 4 detected by the organic matter concentration sensor 8 is greater than the concentration limit value in the control module 9 and / or the ratio of the organic matter concentration in the exhaust manifold 4 to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module 9, the two-position three-way reversing valve 5 is used to close the right purification branch pipe, heat up and desorb the activated carbon filter device in the purification branch pipe, and open the left purification branch pipe for filtration, thereby realizing cyclic heating and desorption and cyclic filtration.

[0048] Organic matter is filtered from polluted air, and organic matter filters 6 are installed in both the left and right purification pipes. One of the organic matter filters 6 is selected to filter organic matter. When the organic matter filter 6 is saturated, the other organic matter filter 6 is used to filter organic matter. The saturated organic matter filter 6 is heated and desorbed. This continuous cycle of alternating organic matter filtering and desorption from the saturated filter eliminates the need to replace the filter element of the organic matter filter when it is saturated, extending the service life of the organic matter filter 6. The heat for heating and desorption in the saturated state comes from the waste heat of the engine coolant or the waste heat of the vehicle exhaust, making full use of the vehicle's own energy, which is more energy-saving and environmentally friendly. The organic matter concentration sensor 8 is used to detect the concentration of the exhaust manifold 4 and / or the interior of the vehicle, and the detected organic matter concentration is used to determine whether the organic matter filter device 6 is in a saturated state. When the detected organic matter concentration is greater than the organic matter concentration limit value in the control module 9 and / or the ratio of the organic matter concentration in the exhaust manifold 4 to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module 9, it indicates that the organic matter filter device 6 is already in a saturated state and should be subjected to temperature increase and desorption. The connection between the control module 9 and the two-position three-way reversing valve 5 can switch back and forth between different purification branch ventilation operations, and the connection between the control module 9 and the heating device 25 controls the temperature increase and desorption treatment of the organic matter filter device 6 in a saturated state. The purpose of providing a temperature sensor 15 in the purification branch and a timing device 16 in the control module 9 is to ensure that the organic matter filter device 6 in a saturated state is subjected to temperature increase and desorption for a certain period of time at a certain temperature to ensure the temperature increase and desorption efficiency. The circulation branch pipe 10 communicates with the pre-purification branch pipe 11 and the post-purification branch pipe 12 via the circulation heating valve 13 and the outlet valve 7, forming a circulation heating channel. This channel circulates air, thereby circulating and heating the organic matter filter 6, improving heating efficiency. The purification device also includes a primary purification device located within the intake manifold 2. This primary purification device comprises a coarse filter 23 and a PM2.5 filter 24, arranged sequentially from the air inlet 1 to the purification branch pipe. This device provides multi-stage purification of polluted air, enhancing air purification effectiveness. This air purification system can be directly integrated with the vehicle's existing air circulation system, being installed before the air is discharged without disrupting the vehicle's existing air circulation system. A blower 26 is installed in the pre-purification branch pipe 11, located between the circulation heating valve 13 and the outlet device on the same side. This blower 26 maintains air circulation after air re-enters the pre-purification branch pipe 11 through the circulation heating valve 13. It also offsets the purification device's own resistance to ensure effective air flow in purification mode.The gas inlet pipe 20 is connected to an air collecting hood 21, which is arranged on the side of the blower 26 close to the heat outlet device. Its function is to allow the air blown to the heat outlet device by the blower 26 to fully enter the heat outlet device through the air collecting hood 21, thereby improving the heating and desorption effect of the organic matter filtering device 6. Example

[0049] according to Figures 1 to 3 The control method of an air purification system based on automobile engine waste heat regeneration shown includes the following control process:

[0050] The two-position three-way reversing valve 5 on both sides of the purification branch pipe is used to ventilate and purify the left purification branch pipe, and the right purification branch pipe is closed. The organic matter concentration sensor 8 is used to monitor the organic matter concentration at the outlet main pipe 4 in real time;

[0051] The detection data is sent in real time to the control module 9 which is provided with an organic matter concentration limit value and / or an organic matter concentration multiple value. The control module 9 compares the organic matter concentration at the outlet manifold 4 detected by the organic matter concentration sensor 8 with the organic matter concentration limit value and / or the organic matter multiple concentration value in the control module 9. When the concentration at the outlet manifold 4 detected by the organic matter concentration sensor 8 is greater than the concentration limit value in the control module 9 and / or the ratio of the organic matter concentration in the outlet manifold 4 to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module 9, it indicates that the activated carbon filter device in the left purification branch is in a saturated state. The control module 9 then controls the two-position three-way reversing valves 5 on both sides of the purification branch, closing the left purification branch for temperature desorption and opening the right purification branch for organic matter filtration.

[0052] While closing the left purification branch pipe, open the fluid control valve 22 on the left plate-fin heat exchanger to allow the coolant or exhaust gas to flow into the plate-fin heat exchanger. At the same time, the blower 26 blows cold air toward the air collecting cover 21 and into the left plate-fin heat exchanger. The coolant or exhaust gas exchanges heat with the air, and the heated air is sprayed toward the activated carbon filter device for temperature rise and desorption.

[0053] Then the control module 9 opens the air outlet valve 7 and the circulating heating valve 13 on the left purification branch pipe. The heated air is sprayed from the plate-fin heat exchanger to the activated carbon filter device, and then enters the post-purification branch pipe 12. Then, it enters the circulating branch pipe 10 through the air outlet valve 7 at the post-purification branch pipe 12. Then, it enters the pre-purification branch pipe 11 through the circulating heating valve 13 from the circulating branch pipe 10. Finally, driven by the blower 26, the air re-enters the plate-fin heat exchanger and is heated by the plate-fin heat exchanger before being sprayed back to the activated carbon filter device, thereby achieving circulating heating of the activated carbon filter device.

[0054] At the same time, the temperature sensor 15 detects the temperature of the purification branch pipe on the left side and sends the detected temperature value to the control module 9 in real time. The control module 9 compares the temperature value detected by the temperature sensor 15 with the temperature limit value in the control module 9. When the detected temperature value is greater than the temperature limit value in the control module 9, the timing device 16 in the control module 9 starts timing. When the detected temperature value is less than the temperature limit value in the control module 9, the timing device 16 in the control module 9 pauses timing until the detected temperature value exceeds the temperature limit value in the control module 9 and resumes timing.

[0055] When the timing time of the timing device 16 reaches the time threshold in the timing device 16, the timing device 16 is reset to zero, and the control module 9 closes the circulating heating valve 13 of the left purification branch and the fluid control valve 22 of the heat exchanger, and opens the pollutant exhaust valve 14 and the fresh air valve of the left purification branch. The outside air is introduced through the fresh air valve 27 and blown to the plate-fin heat exchanger through the blower 26, and enters the activated carbon filter device through the plate-fin heat exchanger, and then enters the post-purification branch 12, and then enters the circulation branch 10 through the air outlet valve 7 on the post-purification branch 12, and finally is discharged through the pollutant exhaust valve 14 on the circulation branch 10, and at the same time takes out the pollutants generated during the temperature rise and desorption. After exhausting for a period of time, the control module 9 controls the closing of the pollutant exhaust valve 14, the air outlet valve 7 and the fresh air valve. From then on, the temperature rise and desorption of the activated carbon filter device are completed and ready for use;

[0056] When the concentration of the exhaust manifold 4 detected by the organic matter concentration sensor 8 is greater than the concentration limit value in the control module 9 and / or the ratio of the organic matter concentration in the exhaust manifold 4 to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module 9, the two-position three-way reversing valve 5 is used to close the right purification branch pipe, heat up and desorb the activated carbon filter device in the purification branch pipe, and open the left purification branch pipe for filtration, thereby realizing cyclic heating and desorption and cyclic filtration.

[0057] In the aforementioned control method for an air purification system based on automobile engine waste heat regeneration, the organic matter concentration limit in the control module 9 is 50%-60% of the national standard limit for total indoor volatile organic compounds (TVOC), the organic matter concentration multiplier in the control module 9 is 1.5-2.0 times, and the temperature limit in the control module 9 is 55°C-65°C. The time threshold in the timing device 16 is 1.5-2.5 hours.

Claims

1. An air purification system based on automobile engine waste heat regeneration, comprising an air purification device and a heat dissipation device, characterized in that: The purification device includes an intake manifold connected to the air inlet and an outlet manifold connected to the air outlet, the intake manifold is bifurcated into two purification branch pipes near one end of the outlet manifold, one end of the left and right purification branch pipes is connected to the intake manifold, and the other end is connected to the outlet manifold after being combined, and the left and right purification branch pipes are respectively connected to the intake manifold and the intake branch pipe through a two-position three-way reversing valve, the purification device includes an organic matter filtering device provided in the purification branch pipe, the purification branch pipe is connected to the heat outlet device, the purification branch pipe is provided with an outlet valve, an organic matter concentration sensor for measuring the concentration of organic matter is provided in the outlet manifold and / or in the vehicle, the organic matter concentration sensor is connected to a control module provided with an organic matter concentration limit value and / or an organic matter concentration multiple value, and the control module is connected to the heat outlet device, the two-position three-way reversing valve and the outlet valve; A circulation branch is provided between the purification branch pipe on the left and the purification branch pipe on the right, the organic matter filtering device is centrally arranged in the purification branch pipe to divide the purification branch into a front purification branch pipe connected to the air inlet main pipe and a rear purification branch pipe connected to the air outlet main pipe, the heat outlet device is arranged in the front purification branch pipe, the front purification branch pipe is provided with a circulation heating valve, and the rear purification branch pipe is provided with the air outlet valve, and the circulation heating valve, the heat outlet device and the air outlet valve are sequentially provided from the air inlet main pipe to the air outlet main pipe, the circulation branch pipe is connected with the front purification branch pipe and the rear purification branch pipe on the same side through the circulation heating valve and the air outlet valve on the same side to form a circulation heating channel, the circulation branch pipe is provided with a pollutant exhaust valve, a temperature sensor is provided in the purification branch pipe, the temperature sensor is connected to the control module with a temperature limit value, the control module is provided with a timing device with a time threshold, and the control module is connected to the circulation heating valve; The purpose of setting a temperature sensor in the purification branch pipe and setting a timing device in the control module is to ensure that the organic matter filter device in a saturated state is heated and desorbed for a certain period of time at a certain temperature to ensure the heating and desorption efficiency. The circulation branch pipe is connected with the front purification branch pipe and the rear purification branch pipe through the circulation heating valve and the outlet valve to form a circulation heating channel. The purpose is to form an air circulation flow to circulate and heat the organic matter filter device to improve the heating efficiency.

2. The air purification system based on automobile engine waste heat regeneration according to claim 1, characterized in that: The heat output device is a plate-fin heat exchanger, the fluid inlet pipe of the plate-fin heat exchanger is connected to the coolant outlet pipe of the engine or the exhaust pipe, the fluid outlet pipe of the plate-fin heat exchanger is connected to the coolant inlet pipe or the exhaust pipe of the engine, the gas outlet pipe of the plate-fin heat exchanger is arranged toward the organic matter filtering device, the gas inlet pipe of the plate-fin heat exchanger is arranged on the side of the circulating heating valve away from the intake manifold, the fluid inlet pipe is provided with a fluid control valve for controlling the inflow of fluid, and the fluid control valve is connected to the control module.

3. The air purification system based on automobile engine waste heat regeneration according to claim 1 is characterized in that: The organic matter filtering device is an activated carbon filtering device, and the circulating heating valve, pollutant exhaust valve and air outlet valve are all one-way valves.

4. The air purification system based on automobile engine waste heat regeneration according to claim 3 is characterized in that: The purification device also includes a primary purification device arranged in the air intake main pipe, and the primary purification device includes a coarse filter and a PM2.5 filter arranged in sequence from the air inlet to the purification branch pipe.

5. The air purification system based on automobile engine waste heat regeneration according to claim 2, characterized in that: A blower is provided in the pre-purification branch pipe between the circulating heating valve and the heat outlet device on the same side, and an air collecting hood is connected to the gas inlet pipe. The air collecting hood is provided on the side of the blower close to the heat outlet device.

6. The air purification system based on automobile engine waste heat regeneration according to claim 5, characterized in that: A fresh air valve is provided on the purification branch pipe at the side of the blower away from the heat outlet device, and the fresh air valve is connected to the control module.

7. A control method for an air purification system based on automobile engine waste heat regeneration, characterized in that: The control method includes an air purification system based on automobile engine waste heat regeneration according to any one of claims 1 to 6, and the control method further includes the following control process: a. Use the two-position three-way reversing valves on both sides of the purification branch pipe to ventilate and purify the left purification branch pipe, and seal the right purification branch pipe. Use an organic matter concentration sensor to monitor the organic matter concentration at the outlet main pipe in real time; b. The detection data is sent in real time to a control module configured with an organic matter concentration threshold and / or organic matter concentration multiple value. The control module compares the organic matter concentration at the exhaust manifold detected by the organic matter concentration sensor with the organic matter concentration threshold and / or organic matter concentration multiple value stored in the control module. When the exhaust manifold concentration detected by the organic matter concentration sensor is greater than the concentration threshold value stored in the control module and / or the ratio of the organic matter concentration in the exhaust manifold to the organic matter concentration inside the vehicle is greater than the organic matter concentration multiple value stored in the control module, it indicates that the activated carbon filter in the left purification branch is saturated. The control module then controls the two-position, three-way reversing valves on both sides of the purification branch, closing the left purification branch for temperature desorption and opening the right purification branch for organic matter filtration. c. While closing the left purification branch pipe, open the fluid control valve on the left plate-fin heat exchanger to allow coolant or exhaust gas to flow into the plate-fin heat exchanger. Simultaneously, the blower blows cold air toward the air hood and into the left plate-fin heat exchanger. The coolant or exhaust gas exchanges heat with the air, heating it and spraying it toward the activated carbon filter for temperature-raising desorption. d. The control module then opens the outlet valve and circulating heating valve on the left purification branch. The heated air is sprayed from the plate-fin heat exchanger to the activated carbon filter, then enters the post-purification branch. From there, it enters the circulation branch through the outlet valve. From there, it passes through the circulation branch and into the pre-purification branch through the circulating heating valve. Finally, driven by the blower, the air re-enters the plate-fin heat exchanger and, after being heated by the plate-fin heat exchanger, is sprayed back toward the activated carbon filter, achieving circulating heating of the activated carbon filter. e. At the same time, the temperature sensor detects the temperature of the purification branch pipe on the left and sends the detected temperature value to the control module in real time. The control module compares the temperature value detected by the temperature sensor with the temperature limit value in the control module. When the detected temperature value is greater than the temperature limit value in the control module, the timing device in the control module starts timing. When the detected temperature value is less than the temperature limit value in the control module, the timing device in the control module pauses timing until the detected temperature value exceeds the temperature limit value in the control module and resumes timing; f. When the timing duration of the timing device reaches the time threshold in the timing device, the timing device is reset to zero, and the control module closes the circulating heating valve of the left purification pipe and the fluid control valve of the heat exchanger, and opens the pollutant exhaust valve and fresh air valve of the left purification pipe. The outside air is introduced through the fresh air valve and blown to the plate-fin heat exchanger through the blower. The air enters the activated carbon filter device through the plate-fin heat exchanger, then enters the post-purification pipe, and then enters the circulation pipe through the air outlet valve on the post-purification pipe. Finally, it is discharged through the pollutant exhaust valve on the circulation pipe, and at the same time, the pollutants generated during the temperature rise and desorption are taken out. After exhausting for a period of time, the control module controls the closing of the pollutant exhaust valve, the air outlet valve and the fresh air valve. From then on, the temperature rise and desorption of the activated carbon filter device are completed and it is ready for use. g. When the organic matter concentration sensor detects an exhaust manifold concentration greater than the concentration limit value in the control module and / or the ratio of the organic matter concentration in the exhaust manifold to the organic matter concentration in the vehicle is greater than the organic matter concentration multiple value in the control module, the right purification branch pipe is closed via the two-position three-way reversing valve, the activated carbon filter device in the purification branch pipe is heated and desorbed, and the left purification branch pipe is opened for filtration, thereby achieving cyclic heating and desorption and cyclic filtration.

8. The control method of an air purification system based on automobile engine waste heat regeneration according to claim 7, characterized in that: The organic matter concentration limit value in the control module is 50%-60% of the national standard limit value of indoor total volatile organic compounds, the organic matter concentration multiple value in the control module is 1.5 times-2.0 times, and the temperature limit value in the control module is 55℃-65℃.

9. The control method of an air purification system based on automobile engine waste heat regeneration according to claim 7, characterized in that: The time threshold in the timing device is 1.5h-2.5h.

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