Heating devices, heating device control methods and automobiles

Abstract

This application provides a heating device, a heating device control method, and an automobile. The heating device includes: a first temperature detection element installed on the exhaust pipe near the exhaust end, used to detect a first exhaust temperature; a second temperature detection element installed on the exhaust pipe, used to detect a second exhaust temperature; a heating assembly including a connecting pipe, an air pump, and a heating element, the connecting pipe communicating with the exhaust pipe and near the intake end, the air pump and the heating element both installed on the connecting pipe; and a control module electrically connected to the first temperature detection element, the second temperature detection element, the air pump, and the heating element, respectively. The control module is configured to control the operating status of the air pump and the heating element based on the first and second exhaust temperatures after the automobile engine is stopped. This configuration prevents the rapid temperature drop in the exhaust pipe after the engine is stopped, thus reducing the risk of exhaust pipe ice blockage.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a heating device, a heating device control method, and an automobile. Background Technology

[0002] The automotive exhaust system is an important component of a car, mainly used to expel the exhaust gases produced by the car engine outside the vehicle to ensure the normal operation of the engine; a typical automotive exhaust system includes a three-way catalytic converter, a muffler, and an exhaust pipe.

[0003] In the layout of automotive exhaust systems, due to the limitations of chassis space and pipeline routing, exhaust pipes inevitably have a locally lower "U" or "V" shaped arrangement. During vehicle operation, the exhaust gas discharged through the exhaust pipe contains a lot of water vapor. After the vehicle stops, the water vapor that is not discharged in time will condense into water in the exhaust pipe.

[0004] Especially in winter when temperatures are low, the large temperature difference between the inside and outside of the exhaust pipe causes a large amount of condensation to form in the exhaust pipe. This condensation gradually accumulates at the lowest point of the "U" or "V" shaped structure of the exhaust pipe and cannot be discharged. When the temperature drops below zero degrees Celsius, the condensation in the exhaust pipe will freeze into ice. If there is a lot of condensation in the exhaust pipe, it will fill the "U" or "V" shaped area and block the exhaust pipe after freezing. If the temperature remains below zero degrees Celsius, the ice blocking the exhaust pipe cannot melt under natural conditions. When the car engine needs to be started again, the exhaust pipe will be blocked by ice, causing poor exhaust flow and preventing the car engine from starting. In severe cases, it may damage the car engine. Summary of the Invention

[0005] In view of this, this application provides a heating device, a heating device control method, and an automobile that can prevent the automobile exhaust pipe from icing.

[0006] Specifically, the following technical solutions are included:

[0007] In a first aspect, embodiments of this application provide a heating device applied to the exhaust system of an automobile, the exhaust system including an exhaust pipe having an intake end and an exhaust end, and the heating device comprising:

[0008] A first temperature detection element is installed on the exhaust pipe and close to the exhaust end. The first temperature detection element is used to detect the first exhaust temperature.

[0009] A second temperature sensor is installed on the exhaust pipe. The second temperature sensor and the first temperature sensor are distributed at intervals along the extension direction of the exhaust pipe, and the second temperature sensor is located on the side of the first temperature sensor closer to the intake end. The second temperature sensor is used to detect the second exhaust temperature.

[0010] A heating assembly includes a connecting pipe, an air pump, and a heating element. The connecting pipe is connected to the exhaust pipe and is close to the air inlet. The air pump and the heating element are both mounted on the connecting pipe.

[0011] The control module is electrically connected to the first temperature sensor, the second temperature sensor, the air pump, and the heating element, respectively. The control module is configured to control the operating status of the air pump and the heating element based on the first exhaust temperature and the second exhaust temperature after the engine of the vehicle is stopped.

[0012] In an optional embodiment, the heating device further includes a third temperature sensor disposed on the connecting pipe and located on the side of the heating element away from the air pump. The third temperature sensor is electrically connected to the control module and is used to detect the outlet air temperature of the heating element.

[0013] In an optional embodiment, the heating device further includes a one-way valve disposed between the connecting pipe and the exhaust pipe, the one-way valve being electrically connected to the control module, and the one-way valve being open from the connecting pipe to the exhaust pipe.

[0014] In an optional embodiment, the control module is configured to control the one-way valve to open after the third temperature sensor detects that the outlet air temperature has reached the opening threshold temperature.

[0015] In an optional embodiment, the second temperature sensing element is located at the middle position in the extension direction of the exhaust pipe.

[0016] In an optional embodiment, there are multiple first temperature sensors and / or second temperature sensors.

[0017] Secondly, embodiments of this application provide a heating device control method, applied to the heating device provided in any embodiment of the first aspect, the heating device control method comprising:

[0018] Check if the car's engine has stopped;

[0019] When the engine of the vehicle is detected to have stopped, the air pump and heating element are turned on, and the heating power of the heating element is adjusted according to the first exhaust temperature and the second exhaust temperature.

[0020] Determine whether the stability conditions are met, wherein the stability conditions include: within a preset time period, the first exhaust temperature is greater than or equal to a first threshold temperature, and the second exhaust temperature is greater than or equal to a second threshold temperature;

[0021] When it is determined that the stability condition is met, the heating element is controlled to reduce the heating power at a preset speed;

[0022] When both the first exhaust temperature and the second exhaust temperature are less than or equal to the ambient temperature, the heating device is shut off.

[0023] In an optional embodiment, when the engine of the vehicle is detected to have stopped, the heating device control method further includes:

[0024] The first threshold temperature is set as the first exhaust temperature when the engine is stopped, and the second threshold temperature is set as the second exhaust temperature when the engine is stopped.

[0025] In an optional embodiment, the heating device further includes a one-way valve disposed between the connecting pipe and the exhaust pipe, the one-way valve being electrically connected to the control module, and the one-way valve being oriented from the connecting pipe to the exhaust pipe.

[0026] The control of the air pump and heating element to turn on, and the adjustment of the heating power of the heating element according to the first exhaust temperature and the second exhaust temperature, specifically includes:

[0027] The air pump and the heating element are controlled to turn on. When the outlet air temperature of the heating element is greater than or equal to the opening threshold temperature, the one-way valve is controlled to open, wherein the opening threshold temperature is greater than the second temperature.

[0028] The heating power of the heating element is adjusted according to the first exhaust temperature and the second exhaust temperature.

[0029] In an optional embodiment, determining whether the vehicle's engine has stopped specifically includes:

[0030] When the external ambient temperature is less than or equal to 0°C, check whether the engine of the vehicle has stopped.

[0031] Thirdly, embodiments of this application provide an automobile, the automobile including the heating device provided in any embodiment of the first aspect, or the automobile being controlled according to the heating device control method provided in any embodiment of the second aspect.

[0032] The beneficial effects of the technical solution provided in this application include at least the following: by setting a first temperature detection element and a second temperature detection element, the airflow temperature at different positions in the exhaust pipe can be accurately obtained; by setting a control module and a heating component, the control module controls the operation status of the air pump and the heating component according to the first exhaust temperature and the second exhaust temperature, so as to flexibly and accurately heat the exhaust pipe, prevent the temperature in the exhaust pipe from dropping rapidly after the engine stops and forming condensate, thereby reducing the risk of ice blockage in the exhaust pipe. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the heating device provided in the embodiments of this application;

[0035] Figure 2 This is a schematic flowchart of the heating device control method provided in the embodiments of this application.

[0036] The reference numerals in the figure are respectively:

[0037] 1-First temperature sensor; 2-Second temperature sensor; 3-Heating assembly; 31-Air pump; 32-Heating element; 33-Connecting pipe; 4-Control module; 5-Third temperature sensor; 6-One-way valve;

[0038] 100 - Exhaust pipe; 101 - Intake end; 102 - Exhaust end; 200 - Front muffler assembly; 300 - Rear muffler assembly.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0042] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art. Some technical terms appearing in the embodiments of this application are described below.

[0043] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] like Figure 1 As shown in the figure, this application embodiment provides a heating device applied to the exhaust system of an automobile. The exhaust system includes an exhaust pipe 100, which has an intake end 101 and an exhaust end 102. The heating device includes a first temperature detection element 1, a second temperature detection element 2, a heating assembly 3, and a control module 4.

[0045] The first temperature detection element 1 is installed on the exhaust pipe 100 and close to the exhaust end 102. The first temperature detection element 1 is used to detect the first exhaust temperature.

[0046] The second temperature sensor 2 is installed on the exhaust pipe 100. The second temperature sensor 2 and the first temperature sensor 1 are distributed at intervals along the extension direction of the exhaust pipe 100, and the second temperature sensor 2 is located on the side of the first temperature sensor 1 closer to the intake end 101. The second temperature sensor 2 is used to detect the second exhaust temperature.

[0047] The heating assembly 3 includes a connecting pipe 33, an air pump 31, and a heating element 32. The connecting pipe 33 is connected to the exhaust pipe 100 and is close to the air inlet 101. The air pump 31 and the heating element 32 are both installed on the connecting pipe 33.

[0048] The control module 4 is electrically connected to the first temperature detection element 1, the second temperature detection element 2, the air pump 31 and the heating element 32 respectively. The control module 4 is configured to control the operating status of the air pump 31 and the heating element 32 according to the first exhaust temperature and the second exhaust temperature after the car engine is stopped.

[0049] For example, the first temperature detection element 1 and the second temperature detection element 2 are temperature sensors, thermocouples, or other components capable of detecting temperature.

[0050] The first temperature sensor 1 and the second temperature sensor 2 are installed at different positions inside the exhaust pipe 100 to facilitate the detection of exhaust temperature at different locations. For example, the first temperature sensor 1 is located at the tail end of the exhaust pipe 100, and the second temperature sensor 2 is located in the middle of the exhaust pipe 100. The first temperature sensor 1 is close to the external environment and can also detect the ambient temperature.

[0051] For example, the heating element 32 is an electric heating plate, electric heating tube, electric heating core, or other components used to heat gas. The air pump 31 is used to deliver air from the external environment to the connecting pipe 33. The heating element 32 is located at the output end of the air pump 31 and is used to heat the air delivered by the air pump 31. The heated airflow enters the exhaust pipe 100 through the connecting pipe 33, which can reduce the generation of condensate and remove condensate from the exhaust pipe 100.

[0052] For example, the control module 4 includes controllers such as an Electronic Control Unit (ECU). By setting the control module 4 to control the operating status of the air pump 31 and the heating element 32 after the engine stops, the rapid cooling of the exhaust pipe 100 after the car engine stops, which would generate a large amount of condensate and freeze, thus affecting the normal operation of the car engine.

[0053] For example, the operating status of the air pump 31 and the heating element 32 includes the start-up and shutdown of the air pump 31 and the heating element 32, the operating power, the speed, etc.

[0054] Specifically, the first temperature detector 1 and the second temperature detector 2 are configured to detect the first exhaust temperature and the second exhaust temperature when the engine is stopped, and send the first exhaust temperature signal and the second exhaust temperature signal to the control module 4. The first exhaust temperature signal and the second exhaust temperature signal are used to indicate the first exhaust temperature and the second exhaust temperature, respectively. The control module 4 is configured to receive the first exhaust temperature signal and the second exhaust temperature signal, and send control signals to the air pump 31 and the heating element 32. The air pump 31 and the heating element 32 are configured to receive the control signals and adjust their own operating states.

[0055] Furthermore, after the first exhaust temperature and the second exhaust temperature stabilize, the control module 4 controls the heating element 32 to gradually reduce the power, thereby causing the airflow temperature flowing into the exhaust pipe 100 to slowly decrease until the exhaust temperature inside the exhaust pipe 100 is consistent with the external ambient temperature. This slowly reduces the temperature difference between the inside and outside of the exhaust pipe 100, thereby preventing the formation of condensate in the exhaust pipe 100 and reducing the risk of ice blockage in the exhaust pipe 100.

[0056] Since the control module 4 receives the first exhaust temperature signal and the second exhaust temperature signal, it can flexibly and accurately control the operating status of the air pump 31 and the heating element 32 according to the actual temperature of each section of the exhaust pipe 100, so as to prevent the local temperature of the exhaust pipe 100 from dropping suddenly due to improper heating temperature control, resulting in condensation and ice blockage.

[0057] In an optional embodiment, the control module 4 is configured to control the operating status of the air pump 31 and the heating element 32 based on the first exhaust temperature and the second exhaust temperature after the ambient temperature is less than or equal to 0°C and the vehicle's engine has stopped. Exemplarily, the ambient temperature can be detected by the first temperature sensor 1, or by other temperature sensors installed on the vehicle. By setting the control module 4 to operate when the ambient temperature is less than or equal to 0°C, it is possible to specifically prevent the exhaust pipe 100 from freezing during seasons prone to icing, thereby reducing the energy consumption of the heating device.

[0058] The heating device provided in this application embodiment accurately obtains the airflow temperature at different positions within the exhaust pipe 100 by setting a first temperature detection element 1 and a second temperature detection element 2; by setting a control module 4 and a heating component 3, the control module 4 controls the operating status of the air pump 31 and the heating component 32 according to the first exhaust temperature and the second exhaust temperature, so as to flexibly and accurately heat the exhaust pipe 100, prevent the formation of condensate in the exhaust pipe 100, and thereby reduce the risk of ice blockage in the exhaust pipe 100.

[0059] In a further embodiment, the heating device further includes a third temperature detection element 5, which is disposed on the connecting pipe 33 and located on the side of the heating element 32 away from the air pump 31. The third temperature detection element 5 is electrically connected to the control module 4 and is used to detect the outlet air temperature of the heating element 32.

[0060] For example, the third temperature detection element 5 is a temperature sensor, thermocouple, or other component capable of detecting temperature.

[0061] The third temperature detection element 5 is located downstream of the heating element 32. It can detect the outlet temperature of the airflow after being heated by the heating element 32 and send an outlet temperature signal to the control module 4 to indicate the outlet temperature. This allows the control module 4 to more accurately control the operating status of the air pump 31 and the heating element 32, and thus more precisely adjust the outlet temperature.

[0062] In a further embodiment, the heating device also includes a one-way valve 6, which is disposed between the connecting pipe 33 and the exhaust pipe 100. The one-way valve 6 is electrically connected to the control module 4, and the conduction direction of the one-way valve 6 is from the connecting pipe 33 to the exhaust pipe 100.

[0063] Specifically, such as Figure 1 As shown, the one-way valve 6 is located on the side of the heating element 32 away from the air pump 31, and the third temperature detection element 5 is located between the one-way valve 6 and the heating element 32. By setting the conduction direction of the one-way valve 6 to be from the connecting pipe 33 to the exhaust pipe 100, the gas flow direction can be limited to prevent gas backflow, which is beneficial to improving the efficiency of the air pump 31 in delivering air to the exhaust pipe 100.

[0064] In an optional embodiment, the check valve 6 is a normally open valve.

[0065] In another alternative embodiment, the control module 4 is configured to control the one-way valve 6 to open after the third temperature sensor 5 detects that the outlet air temperature has reached the opening threshold temperature.

[0066] In this embodiment, the one-way valve 6 opens after the outlet air temperature reaches the opening threshold temperature, ensuring that the gas temperature entering the exhaust pipe 100 from the connecting pipe 33 is relatively high, thus preventing the temperature of the exhaust pipe 100 from dropping rapidly and forming a large amount of condensate.

[0067] The opening threshold temperature is a reference temperature value. It can be a pre-set value or determined based on the second exhaust temperature when the engine is stopped, according to a pre-set lookup table or calculation formula. For example, the opening threshold temperature is greater than the second exhaust temperature when the engine is stopped. For instance, if the first exhaust temperature when the engine is stopped is 80°C and the second exhaust temperature is 120°C, then the opening threshold temperature is 150°C.

[0068] In one specific embodiment, the second temperature detection element 2 is located at the middle position in the extension direction of the exhaust pipe 100.

[0069] like Figure 1 As shown, the second temperature detection element 2 is located between the front muffler assembly 200 and the rear muffler assembly 300 of the car, and the heating element 3 is close to the air intake end 101 of the exhaust pipe 100.

[0070] In this embodiment, by setting the second temperature detection element 2 at the middle position in the extension direction of the exhaust pipe 100, the control module 4 can flexibly and accurately control the operating status of the air pump 31 and the heating element 32 according to the actual temperature of the middle and tail of the exhaust pipe 100, so as to prevent the local temperature of the exhaust pipe 100 from dropping suddenly due to improper heating temperature control, resulting in condensation and ice blockage.

[0071] In one embodiment, there are multiple first temperature sensors 1 and / or second temperature sensors 2.

[0072] Specifically, multiple first temperature detection elements 1 and / or second temperature detection elements 2 are distributed at intervals along the extension direction of the exhaust pipe 100, which facilitates exhaust temperature detection in multiple areas of the exhaust pipe 100 and improves the control accuracy of the control module 4.

[0073] This application also provides a heating device control method, which is applied to the heating device provided in any of the above embodiments.

[0074] like Figure 2 As shown, the heating device control method includes:

[0075] S1: Detects whether the car's engine has stopped;

[0076] S2: When the engine of the car is detected to be stopped, the air pump 31 and the heating element 32 are turned on, and the heating power of the heating element 32 is adjusted according to the first exhaust temperature and the second exhaust temperature.

[0077] S3: Determine whether the stability conditions are met, wherein the stability conditions include: within a preset time period, the first exhaust temperature is greater than or equal to the first threshold temperature, and the second exhaust temperature is greater than or equal to the second threshold temperature.

[0078] S4: When it is determined that the stability condition is met, control the heating element 32 to reduce the heating power at a preset speed;

[0079] S5: When both the first exhaust temperature and the second exhaust temperature are less than or equal to the external ambient temperature, control the heating device to shut down.

[0080] For example, in step S1, the control module 4 acquires the engine's operating condition signal and detects whether the engine is stopped based on the operating condition signal. The operating condition signal includes an engine operating status signal, which indicates the engine's operating and stopped states.

[0081] In step S2, by controlling the air pump 31 and the heating element 32 to turn on after the engine stops, the temperature in the exhaust pipe 100 is prevented from cooling rapidly after the car engine stops, which would generate a large amount of condensate and freeze, affecting the normal operation of the car engine.

[0082] In step S3, the first threshold temperature and the second threshold temperature are both reference temperature values. Optionally, the specific values ​​of the first threshold temperature and the second threshold temperature are preset to fixed values, or the first threshold temperature and the second threshold temperature are calculated based on the real-time values ​​of the first exhaust temperature and the second exhaust temperature according to a preset lookup table, calculation formula, etc.

[0083] Under stable conditions, the first exhaust temperature and the second exhaust temperature remain relatively stable. By controlling the heating element 32 to reduce the heating power at a preset rate in step S4, the temperature of the gas flowing into the exhaust pipe 100 decreases slowly, for example, the temperature of the gas flowing into the exhaust pipe 100 decreases slowly at a rate of 10°C / min, to prevent a large amount of condensate from forming in the exhaust pipe 100 due to a rapid drop in temperature.

[0084] The heating element 32 gradually reduces its heating power at a preset speed until it is turned off, so that the first exhaust temperature and the second exhaust temperature are the same as or lower than the external ambient temperature, preventing water vapor in the air from condensing into condensate.

[0085] The heating device control method provided in this application embodiment controls the heating element 32 to reduce the heating power at a preset speed after the stability condition is met. This reduces the temperature difference between the inside and outside of the exhaust pipe 100 after the engine is stopped, and reduces the possibility of a large amount of condensate forming inside the exhaust pipe 100 due to a rapid drop in temperature. This helps to fundamentally reduce the risk of ice blockage in the exhaust pipe 100.

[0086] In a further embodiment, in step S2, when the engine of the vehicle is detected to have stopped, the heating device control method further includes:

[0087] The first threshold temperature is set to the first exhaust temperature when the engine is stopped, and the second threshold temperature is set to the second exhaust temperature when the engine is stopped.

[0088] It should be noted that the first exhaust temperature when the engine is stopped is the first exhaust temperature when the engine switches from running to stopped, and the second exhaust temperature when the engine is stopped is the second exhaust temperature when the engine switches from running to stopped.

[0089] In this embodiment, the first exhaust temperature and the second exhaust temperature when the engine is stopped are used as reference temperatures to adjust the heating power of the heating element 32, so that the exhaust temperature in the exhaust pipe 100 is relatively stable and does not drop suddenly, thereby reducing the generation of condensate.

[0090] For example, if the first exhaust temperature when the engine is stopped is 80°C and the second exhaust temperature when the engine is stopped is 120°C, then the first threshold temperature is 80°C and the second threshold temperature is 120°C. If the first exhaust temperature remains at or above 80°C and the second exhaust temperature remains at or above 120°C within a preset time period, then the stability condition is met.

[0091] For example, in step S2, after confirming the first threshold temperature and the second threshold temperature, the heating power of the heating element 32 is adjusted according to the first exhaust temperature and the second exhaust temperature. For example, if the first exhaust temperature does not reach the first threshold temperature or the second exhaust temperature does not reach the second threshold temperature, the heating power of the heating element 32 is increased so that the first exhaust temperature reaches the first threshold temperature and the second exhaust temperature reaches the second threshold temperature.

[0092] In a further embodiment, the heating device further includes a one-way valve 6, which is disposed between the connecting pipe 33 and the exhaust pipe 100. The one-way valve 6 is electrically connected to the control module 4, and the conduction direction of the one-way valve 6 is from the connecting pipe 33 to the exhaust pipe 100. Step S2 involves controlling the air pump 31 and the heating element 32 to start, and adjusting the heating power of the heating element 32 according to the first exhaust temperature and the second exhaust temperature. Specifically, this includes:

[0093] Control the air pump 31 and the heating element 32 to turn on. When the outlet air temperature of the heating element 32 is greater than or equal to the opening threshold temperature, control the one-way valve 6 to open. The opening threshold temperature is greater than the second temperature.

[0094] The heating power of the heating element 32 is adjusted according to the first exhaust temperature and the second exhaust temperature.

[0095] In this embodiment, the one-way valve 6 opens after the outlet air temperature reaches the opening threshold temperature, ensuring that the gas temperature entering the exhaust pipe 100 from the connecting pipe 33 is relatively high, thus preventing the temperature of the exhaust pipe 100 from dropping rapidly and forming a large amount of condensate.

[0096] The activation threshold temperature is a reference temperature value. It can be a pre-set value or determined based on a second threshold temperature according to a pre-set lookup table or calculation formula. The activation threshold temperature is greater than the second threshold temperature; for example, if the first threshold temperature is 80℃, the second threshold temperature is 120℃, and the activation threshold temperature is 150℃.

[0097] In one embodiment, determining whether the engine has stopped in step S1 specifically includes:

[0098] Check whether the car's engine has stopped when the ambient temperature is less than or equal to 0°C.

[0099] Optionally, the ambient temperature is obtained through the first temperature sensor 1; or, other temperature sensors for detecting the ambient temperature are installed on the vehicle, and the ambient temperature is obtained based on the other temperature sensors.

[0100] This setting can specifically prevent the exhaust pipe 100 from freezing during seasons prone to icing, thus reducing the energy consumption of the heating device.

[0101] In one specific embodiment, the heating device control method includes:

[0102] Check whether the car's engine has stopped when the ambient temperature is less than or equal to 0°C.

[0103] Set the first threshold temperature to the first exhaust temperature when the engine is stopped, and set the second threshold temperature to the second exhaust temperature when the engine is stopped.

[0104] The air pump 31 and the heating element 32 are turned on. When the outlet air temperature of the heating element 32 is greater than or equal to the opening threshold temperature, the one-way valve 6 is turned on. The heating power of the heating element 32 is adjusted according to the first exhaust temperature and the second exhaust temperature.

[0105] Determine whether the stability conditions are met. The stability conditions include: within a preset time period, the first exhaust temperature is greater than or equal to the first threshold temperature, and the second exhaust temperature is greater than or equal to the second threshold temperature.

[0106] When it is determined that the stability condition is met, the heating element 32 is controlled to reduce the heating power at a preset speed.

[0107] When both the first exhaust temperature and the second exhaust temperature are less than or equal to the ambient temperature, the heating device is shut off.

[0108] This application also provides a vehicle, which includes the heating device provided in any of the above embodiments, or the vehicle is controlled according to the heating device control method provided in any of the above embodiments.

[0109] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0110] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0111] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A heating device for use in the exhaust system of an automobile, the exhaust system comprising an exhaust pipe (100) having an intake end (101) and an exhaust end (102), characterized in that, The heating device includes: A first temperature detection element (1) is installed on the exhaust pipe (100) and close to the exhaust end (102). The first temperature detection element (1) is used to detect the first exhaust temperature. The second temperature detection element (2) is installed on the exhaust pipe (100). The second temperature detection element (2) and the first temperature detection element (1) are distributed at intervals along the extension direction of the exhaust pipe (100), and the second temperature detection element (2) is located on the side of the first temperature detection element (1) near the air intake end (101). The second temperature detection element (2) is used to detect the second exhaust temperature. The heating assembly (3) includes a connecting pipe (33), an air pump (31), and a heating element (32). The connecting pipe (33) is connected to the exhaust pipe (100) and is close to the air inlet (101). The air pump (31) and the heating element (32) are both mounted on the connecting pipe (33). The control module (4) is electrically connected to the first temperature detection element (1), the second temperature detection element (2), the air pump (31) and the heating element (32) respectively. The control module (4) is configured to control the operating status of the air pump (31) and the heating element (32) according to the first exhaust temperature and the second exhaust temperature after the engine of the car is stopped. After the first exhaust temperature and the second exhaust temperature stabilize, the control module (4) controls the heating element (32) to gradually reduce the power, thereby causing the airflow temperature flowing into the exhaust pipe (100) to slowly decrease until the exhaust temperature in the exhaust pipe (100) is consistent with the external ambient temperature.

2. The heating device according to claim 1, characterized in that, The heating device further includes a third temperature detection element (5), which is disposed on the connecting pipe (33) and located on the side of the heating element (32) away from the air pump (31). The third temperature detection element (5) is electrically connected to the control module (4) and is used to detect the outlet air temperature of the heating element (32).

3. The heating device according to claim 2, characterized in that, The heating device also includes a one-way valve (6), which is disposed between the connecting pipe (33) and the exhaust pipe (100). The one-way valve (6) is electrically connected to the control module (4), and the conduction direction of the one-way valve (6) is from the connecting pipe (33) to the exhaust pipe (100).

4. The heating device according to claim 3, characterized in that, The control module (4) is configured to control the one-way valve (6) to open after the third temperature detector (5) detects that the outlet air temperature has reached the opening threshold temperature.

5. The heating device according to claim 1, characterized in that, The second temperature detection element (2) is located at the middle position in the extension direction of the exhaust pipe (100).

6. The heating device according to claim 1, characterized in that, There are multiple first temperature detection elements (1) and / or second temperature detection elements (2).

7. A heating device control method, applied to the heating device according to any one of claims 1 to 6, characterized in that, The heating device control method includes: Check if the car's engine has stopped; When the engine of the vehicle is detected to be stopped, the air pump (31) and the heating element (32) are turned on, and the heating power of the heating element (32) is adjusted according to the first exhaust temperature and the second exhaust temperature. Determine whether the stability conditions are met, wherein the stability conditions include: within a preset time period, the first exhaust temperature is greater than or equal to a first threshold temperature, and the second exhaust temperature is greater than or equal to a second threshold temperature; When it is determined that the stability condition is met, the heating element (32) is controlled to reduce the heating power at a preset speed; When both the first exhaust temperature and the second exhaust temperature are less than or equal to the ambient temperature, the heating device is shut off.

8. The heating device control method according to claim 7, characterized in that, When the engine of the vehicle is detected to have stopped, the heating device control method further includes: The first threshold temperature is set as the first exhaust temperature when the engine is stopped, and the second threshold temperature is set as the second exhaust temperature when the engine is stopped.

9. The heating device control method according to claim 7, characterized in that, The heating device also includes a one-way valve (6), which is disposed between the connecting pipe (33) and the exhaust pipe (100). The one-way valve (6) is electrically connected to the control module (4), and the conduction direction of the one-way valve (6) is from the connecting pipe (33) to the exhaust pipe (100). The control air pump (31) and heating element (32) are turned on, and the heating power of the heating element (32) is adjusted according to the first exhaust temperature and the second exhaust temperature, specifically including: Control the air pump (31) and the heating element (32) to turn on. When the outlet air temperature of the heating element (32) is greater than or equal to the opening threshold temperature, control the one-way valve (6) to open, wherein the opening threshold temperature is greater than the second temperature. The heating power of the heating element (32) is adjusted according to the first exhaust temperature and the second exhaust temperature.

10. The heating device control method according to claim 7, characterized in that, The detection of whether the car's engine has stopped specifically includes: When the external ambient temperature is less than or equal to 0°C, check whether the engine of the vehicle has stopped.

11. A car, characterized in that, The vehicle includes the heating device according to any one of claims 1 to 6, or the vehicle is controlled according to the heating device control method according to any one of claims 7 to 10.

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