Heat exchange device, system and method, storage medium, program product and vehicle

Abstract

The invention relates to the technical field of vehicles, and provides a heat exchange device, system and method, a storage medium, a program product and a vehicle. The invention provides a heat exchange device which comprises a heat exchange body used for conducting heat exchange with gas. The liquid monitor is suitable for monitoring liquid at the gas outlet end of the heat exchange body so as to control the gas temperature and / or the gas dew point temperature at the gas outlet end of the heat exchange body. According to the heat exchange device, oil consumption deterioration after the exhaust gas recirculation system is closed is avoided, and the safety of the system is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a heat exchange device, system, method, storage medium, program product, and vehicle. Background Art

[0002] To improve engine thermal efficiency and reduce nitrogen oxide emissions, existing hybrid engines widely utilize externally cooled exhaust gas recirculation (EGR) technology. EGR rates in turbocharged engines are continuously increasing (reaching nearly 30%). Existing EGR valves are controlled solely by signals such as ambient temperature and intake air temperature, which can lead to poor fuel consumption after the valve is closed and fail to address engine misfires. Summary of the Invention

[0003] The present application aims to solve the problems of worsening fuel consumption and easy misfire, and proposes a heat exchange device, system, method, storage medium, program product and vehicle.

[0004] A first aspect of the present application provides a heat exchange device, comprising:

[0005] A heat exchange body, which is used to exchange heat with the gas;

[0006] The liquid monitor is suitable for monitoring the liquid at the gas outlet end of the heat exchange body to control the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body.

[0007] Furthermore, it also includes: an air outlet channel, the air inlet end of the air outlet channel is connected to the gas outlet end of the heat exchange body, and the liquid monitor is arranged in the air outlet channel.

[0008] Furthermore, it also includes: a temperature detection component, which is arranged in the air outlet channel and is used to detect the outlet temperature of the heat exchange body.

[0009] Furthermore, the heat exchange body includes a gas inlet end connected to the gas outlet end, and the gas inlet end is used for supplying gas into the heat exchange body.

[0010] Furthermore, it also includes: an air inlet channel, the air outlet end of the air inlet channel is connected to the gas inlet end of the heat exchange body.

[0011] Furthermore, the air inlet channel includes a first air inlet channel, the air inlet end of the first air inlet channel is used to let in external air, and the air outlet end of the first air inlet channel is connected to the gas inlet end of the heat exchange body.

[0012] Furthermore, the air inlet channel also includes a second air inlet channel, the air inlet end of the second air inlet channel is used to let in the exhaust gas, and the air outlet end of the second air inlet channel is connected to the gas inlet end of the heat exchange body.

[0013] Furthermore, it also includes a first gas control component, which is arranged in the second air inlet channel and is used to control the opening of the position where the first gas control component is located.

[0014] Furthermore, the heat exchange body is used to exchange heat between liquid and gas.

[0015] Furthermore, the heat exchange body is used to exchange heat with high-temperature gas through low-temperature liquid.

[0016] Furthermore, the heat exchange body includes a liquid inlet end and a liquid outlet end that are interconnected. The liquid inlet end is used for allowing liquid to enter the heat exchange body, and the liquid outlet end is used for allowing liquid to flow out of the heat exchange body.

[0017] Furthermore, it also includes: a liquid inlet channel, the liquid outlet end of the liquid inlet channel is connected to the liquid inlet end of the heat exchange body.

[0018] Furthermore, it also includes: a liquid control component, which is arranged in the liquid inlet channel and is used to control the opening of the position where the liquid control component is located.

[0019] Furthermore, it also includes: a liquid outlet channel, the liquid inlet end of the liquid outlet channel is connected to the liquid outlet end of the heat exchange body.

[0020] Furthermore, the liquid monitor includes a water immersion sensor, an infrared moisture detector, a water detector and / or a humidity sensor.

[0021] A second aspect of the present application provides a heat exchange system, comprising an engine and the heat exchange device, wherein the air inlet of the engine is connected to the air outlet of the heat exchange device.

[0022] Furthermore, the heat exchange device includes an air outlet channel and a heat exchange body. The engine is arranged at the air outlet end of the air outlet channel, and the heat exchange body is arranged at the air inlet end of the air outlet channel.

[0023] Furthermore, the heat exchange device includes a liquid monitor, and the system also includes: a second gas control component, the second gas control component is arranged in the air outlet channel, the second gas control component is located between the liquid monitor and the engine, and the second gas control component is used to control the opening of the position of the second gas control component.

[0024] A third aspect of the present application provides a heat exchange method, the method comprising:

[0025] The gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body is controlled based on the amount of liquid at the gas outlet of the heat exchange body; the heat exchange body is used to exchange heat with the gas.

[0026] Furthermore, based on the amount of liquid at the gas outlet of the heat exchange body, controlling the gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body includes:

[0027] When the amount of liquid at the gas outlet of the heat exchange body exceeds a preset liquid threshold, increasing the gas temperature at the gas outlet of the heat exchange body;

[0028] And / or, when the amount of liquid at the gas outlet end of the heat exchange body exceeds a preset liquid threshold, the gas dew point temperature at the gas outlet end of the heat exchange body is lowered.

[0029] Furthermore, based on the amount of liquid at the gas outlet of the heat exchange body, controlling the gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body includes:

[0030] When the amount of liquid at the gas outlet of the heat exchange body exceeds a preset liquid threshold, increasing the gas temperature at the gas outlet of the heat exchange body;

[0031] When the outlet temperature of the gas at the gas outlet end of the heat exchange body exceeds a preset temperature threshold, the dew point temperature of the gas at the gas outlet end of the heat exchange body is lowered.

[0032] Furthermore, lowering the gas temperature at the gas outlet end of the heat exchange body includes: increasing the gas temperature at the gas outlet end of the heat exchange body by reducing the liquid inlet amount of the heat exchange body.

[0033] Furthermore, lowering the gas dew point temperature at the gas outlet end of the heat exchange body includes: lowering the gas dew point temperature at the gas outlet end of the heat exchange body by reducing the exhaust gas content at the gas inlet end of the heat exchange body.

[0034] Furthermore, in the heat exchange device, the amount of liquid at the gas outlet of the heat exchange body is obtained through a liquid monitor.

[0035] In a fourth aspect, the present application provides a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of the heat exchange method are implemented.

[0036] In a fifth aspect, the present application provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the heat exchange method are implemented.

[0037] In a sixth aspect, the present application provides a vehicle comprising the heat exchange device, or the heat exchange system, which performs the steps of the heat exchange method.

[0038] In summary, this application can at least achieve the following technical effects:

[0039] The heat exchange device of the present application monitors the liquid at the gas outlet end of the heat exchange body through a liquid monitor, and can then control the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body based on the monitoring results of the liquid monitor. It can sense the condensation condition at the gas outlet end of the heat exchange body, avoid the deterioration of fuel consumption after shutting down the exhaust gas recirculation system, and improve the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of the heat exchange device in this application;

[0041] Figure 2 This is a schematic diagram of the heat exchange system in this application Figure 1 ;

[0042] Figure 3 This is a schematic diagram of the heat exchange system in this application Figure 2 ;

[0043] Figure 4 This is the process of the heat exchange method in this application Figure 1 ;

[0044] Figure 5 This is the process of the heat exchange method in this application Figure 2 ;

[0045] Figure 6 is a schematic diagram of the vehicle in this application.

[0046] Reference numerals: 100 - heat exchange device, 110 - heat exchange body, 120 - liquid monitor, 111 - air outlet channel, 112 - liquid inlet channel, 113 - air inlet channel, 114 - second air inlet channel, 115 - first air inlet channel, 116 - liquid outlet channel, 130 - temperature detection element, 140 - liquid control element, 150 - first gas control element, 160 - supercharger;

[0047] 200-heat exchange device system, 210-engine, 220-second gas control component;

[0048] 300-vehicles. DETAILED DESCRIPTION

[0049] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0052] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0053] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0055] The Exhaust Gas Recirculation Rate (EGR) is a key parameter for measuring the efficiency of an internal combustion engine's exhaust gas recirculation system (EGR). The EGR rate refers to the percentage of exhaust gas recirculation volume to the total amount of gas entering the cylinder. The EGR rate can be calculated using two methods: the flow rate method and the carbon dioxide method. The carbon dioxide method has high accuracy but strict equipment requirements, while the flow rate method is simple to calculate. An increase in the EGR rate will dilute the oxygen concentration and lower the combustion temperature, inhibiting the formation of nitrogen oxides. An excessively high EGR rate may lead to incomplete combustion, increased fuel consumption and hydrocarbon emissions, and requires optimization through electronic control. The EGR rate is a core indicator for quantitative regulation of the exhaust gas recirculation system. Its reasonable control is crucial to balancing emissions, fuel consumption, and power performance, and requires comprehensive optimization based on operating conditions, fuel type, and control technology.

[0056] Example 1:

[0057] like Figure 1 As shown, the first embodiment of the present application provides a heat exchange device 100, comprising:

[0058] The heat exchange body 110 is used to exchange heat with the gas;

[0059] The liquid monitor 120 is adapted to monitor the liquid at the gas outlet of the heat exchange body 110 so as to control the gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body 110 .

[0060] The heat exchanger 110 can cool high-temperature gas or heat low-temperature gas. When placed between the supercharger 160 and the engine 210, the heat exchanger 110 can cool the high-temperature gas after the supercharger 160. The heat exchanger 110 can exchange heat with any medium that has a temperature difference with the gas, such as a liquid, gas, or phase-change medium.

[0061] The location of the liquid monitor 120 is not specifically limited, as long as it can monitor the liquid at the gas outlet of the heat exchange body 110. For example, the liquid monitor 120 can be located at the gas outlet of the heat exchange body 110. Alternatively, the liquid monitor 120 can be located near the gas outlet of the heat exchange body 110 to monitor the liquid at the gas outlet of the heat exchange body 110 using a non-contact method such as infrared.

[0062] The liquid monitor 120 is installed at the gas outlet end of the heat exchange body 110. The gas outlet end of the heat exchange body 110 is prone to collect condensed water. The liquid monitor 120 is used to determine whether there is condensed water, and then control the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body.

[0063] The liquid at the gas outlet end of the heat exchange body 110 is monitored by the liquid monitor 120, and the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body 110 can be controlled based on the monitoring result of the liquid monitor 120. The condensation condition at the gas outlet end of the heat exchange body 110 can be sensed, thereby avoiding the deterioration of fuel consumption after shutting down the exhaust gas recirculation system and improving the safety of the system.

[0064] The gas temperature at the gas outlet end of the heat exchange body 110 is the real-time temperature of the gas at the gas outlet end of the heat exchange body 110 .

[0065] The dew point temperature of a gas is the temperature at which, under a certain pressure, the first drop of liquid appears when the gas is cooled. If the temperature continues to drop, all the gas will convert to liquid. Conversely, if a liquid is heated to the point where the first bubble appears, this is called the bubble point temperature. Further heating will cause all the liquid to convert to gas. Therefore, within the intermediate temperature range, gas and liquid coexist. The upper limit of this range is the gas dew point temperature, and the lower limit is the liquid bubble point temperature. The lower the gas dew point temperature, the lower the temperature at which the gas cools to the point where the first drop of liquid appears, and the lower the temperature required for condensation to form.

[0066] The calculation of the gas dew point temperature can be estimated by experimental methods or using specific equations. In practical applications, the calculation of the gas dew point temperature needs to consider a variety of factors, including the composition, pressure, and temperature of the gas. In addition, the gas dew point temperature is also affected by environmental conditions. For example, changes in pressure and humidity will cause changes in the gas dew point temperature. The gas dew point temperature at the gas outlet end of the heat exchange body 110 is the dew point temperature of the gas at the gas outlet end of the heat exchange body 110. To change the gas dew point temperature at the gas outlet end of the heat exchange body 110, the gas dew point temperature can be adjusted by changing the gas composition, pressure, and temperature at the gas outlet end of the heat exchange body 110.

[0067] Furthermore, it also includes: an air outlet channel 111 , the air inlet end of the air outlet channel 111 is connected to the gas outlet end of the heat exchange body 110 , and the liquid monitor 120 is arranged in the air outlet channel 111 .

[0068] Liquid monitor 120 is installed in gas outlet channel 111. Gas outlet channel 111, which is connected to the gas outlet end of heat exchange body 110, is prone to condensation, particularly at the lowest point of gas outlet channel 111. Liquid monitor 120 monitors the liquid level in gas outlet channel 111, particularly at the lowest point of gas outlet channel 111, to determine whether condensation or excess condensation exists in gas outlet channel 111. The gas temperature and / or gas dew point at the gas outlet end of heat exchange body 110 is then controlled based on the liquid level detected by liquid monitor 120. The provision of liquid monitor 120 enables intelligent monitoring of the liquid level at the gas outlet end of heat exchange body 110 or in gas outlet channel 111, thereby rapidly controlling the gas temperature and / or gas dew point at the gas outlet end of heat exchange body 110. This provides rapid monitoring and control response, allowing for on-site resolution of any problems discovered, effectively and efficiently avoiding the adverse effects of condensation.

[0069] Furthermore, the system also includes a temperature detector 130, which is disposed in the outlet passage 111 and is used to detect the outlet temperature of the heat exchange body 110. The temperature detector 130 provides timely feedback on the temperature of the outlet passage 111, thereby monitoring the gas temperature in the outlet passage 111, preventing the outlet temperature of the heat exchange body 110 from being too high, and ensuring the normal operation of the engine 210. Furthermore, the heat exchange efficiency of the heat exchange body 110 can be regulated based on the monitoring results of the temperature detector 130, thereby achieving regulation of the outlet temperature of the heat exchange body 110.

[0070] Furthermore, the heat exchange body 110 includes a gas inlet end, which is connected to the gas outlet end. The gas inlet end is used to supply gas to enter the heat exchange body 110 .

[0071] Furthermore, the heat exchange device 100 further includes an air inlet channel 113, the outlet of which is connected to the gas inlet of the heat exchange body 110. Gas flows from the air inlet channel 113 to the gas inlet and outlet of the heat exchange body 110, and then to the air outlet channel 111, forming a gas flow path of the heat exchange device 100.

[0072] Furthermore, the air inlet channel 113 includes a first air inlet channel 115 , an air inlet end of the first air inlet channel 115 is used to let in external air, and an air outlet end of the first air inlet channel 115 is connected to a gas inlet end of the heat exchange body 110 .

[0073] Furthermore, the intake passage 113 further includes a second intake passage 114. The intake end of the second intake passage 114 is used to admit exhaust gas, and the outlet end of the second intake passage 114 is connected to the gas inlet end of the heat exchange body 110. The proportion of exhaust gas in the intake passage 113 to the total intake air is the EGR rate, and the total intake air is the sum of the exhaust gas entering the second intake passage 114 and the external air entering the first intake passage 115.

[0074] Furthermore, the system further includes a first gas control element 150, which is disposed in the second intake passage 114 and is used to control the opening of the position where the first gas control element 150 is located. By adjusting the opening of the first gas control element 150 disposed in the second intake passage 114, the amount of exhaust gas entering the intake passage 113 can be adjusted, thereby adjusting the EGR rate.

[0075] Furthermore, the heat exchange body 110 is used to exchange heat between liquid and gas. The heat conduction efficiency and specific heat capacity of the liquid are much higher than those of the gas, and the heat exchange efficiency of the liquid is high.

[0076] Furthermore, the heat exchange body 110 is used to exchange heat between low-temperature liquid and high-temperature gas.

[0077] Furthermore, the heat exchange body 110 includes a liquid inlet end and a liquid outlet end that are interconnected. The liquid inlet end is used for allowing liquid to enter the heat exchange body 110 , and the liquid outlet end is used for allowing liquid to flow out of the heat exchange body 110 .

[0078] Furthermore, it also includes: a liquid inlet channel 112 , the liquid outlet end of the liquid inlet channel 112 is connected to the liquid inlet end of the heat exchange body 110 .

[0079] Furthermore, it also includes: a liquid control member 140, which is arranged in the liquid inlet channel 112, and is used to control the opening of the position where the liquid control member 140 is located.

[0080] The flow rate of coolant flowing through the heat exchanger 110 is controlled by controlling the opening of a liquid control element 140 disposed in the liquid inlet passage 112. By controlling the flow rate of coolant flowing through the heat exchanger 110, the liquid control element 140 controls the cooling capacity or heat exchange efficiency of the heat exchanger 110, thereby controlling the outlet temperature of the heat exchanger 110.

[0081] Furthermore, it also includes: a liquid outlet channel 116 , the liquid inlet end of the liquid outlet channel 116 is connected to the liquid outlet end of the heat exchange body 110 .

[0082] The liquid flows from the liquid inlet channel 112 to the liquid inlet and liquid outlet of the heat exchange body 110 and then to the liquid outlet channel 116 , forming a liquid flow channel of the heat exchange device 100 .

[0083] The heat exchange body 110 is a low-temperature heat exchange body.

[0084] Furthermore, the liquid monitor 120 includes a water immersion sensor, an infrared moisture detector, a water detector and / or a humidity sensor.

[0085] The liquid monitor 120 is used to monitor whether there is liquid at the location of the liquid monitor. The liquid monitor 120 capable of monitoring the presence of liquid generally includes: an ultrasonic flow meter that uses ultrasonic technology to detect whether there is liquid flowing in the channel; an infrared moisture detector that uses infrared technology to quickly detect whether there is water in the channel; a channel detector that determines whether there is water by detecting changes in the electromagnetic field in the channel; a water immersion sensor that monitors changes in conductivity after the detection head contacts a conductive liquid such as water. When the sensor contacts liquid water, the electrodes at both ends of the water immersion sensor are connected, the resistance changes, and the different water amounts are judged by the difference in resistance / current; a humidity sensor that senses the ambient humidity through a sensing element.

[0086] Example 2:

[0087] like Figure 2 、 Figure 3 As shown, the second embodiment of the present application provides a heat exchange system 200, including an engine 210 and the heat exchange device 100, wherein the air inlet end of the engine 210 is connected to the air outlet end of the heat exchange device 100.

[0088] The monitoring results of the liquid monitor 120 behind the heat exchange body 110 can accurately control the EGR rate, thereby preventing fire caused by excessive condensed water due to an excessive EGR rate, and avoiding the deterioration of vehicle fuel consumption caused by directly closing the first gas control component 150.

[0089] Furthermore, the heat exchange device 100 includes an air outlet channel 111 and a heat exchange body 110 . The engine 210 is disposed at the air outlet end of the air outlet channel 111 , and the heat exchange body 110 is disposed at the air inlet end of the air outlet channel 111 .

[0090] The engine 210 is connected to the heat exchange body 110 through the air outlet channel 111, so that the gas output by the heat exchange body 110 enters the engine 210, and the liquid monitor 120 monitors the liquid at the gas outlet end of the heat exchange body 110. Specifically, the liquid monitor 120 monitors the liquid in the air outlet channel 111, and then controls the condensation situation at the monitoring position of the liquid monitor 120 based on the monitoring result of the liquid monitor 120, thereby avoiding the deterioration of fuel consumption after shutting down the exhaust gas recirculation system and improving the safety of the heat exchange system 200.

[0091] Furthermore, the heat exchange device 100 includes a liquid monitor 120 and a second gas control element 220. The second gas control element 220 is disposed in the gas outlet passage 111 and is located between the liquid monitor 120 and the engine 210. The second gas control element 220 is used to control the opening of the position where the second gas control element 220 is located. The second gas control element 220 is used to control the load of the engine 210, thereby improving the safety of the heat exchange system 200.

[0092] Example 3:

[0093] like Figure 4 As shown, the third embodiment of the present application provides a heat exchange method, the method comprising:

[0094] The gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body 110 is controlled based on the amount of liquid at the gas outlet of the heat exchange body 110 ; the heat exchange body 110 is used to exchange heat with the gas.

[0095] By controlling the gas temperature and / or gas dew point temperature at the gas outlet by the amount of liquid, the condensation condition at the gas outlet of the heat exchange body 110 can be accurately determined to avoid fire caused by excessive condensation water.

[0096] Furthermore, based on the amount of liquid at the gas outlet of the heat exchange body 110 , controlling the gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body 110 includes:

[0097] When the amount of liquid at the gas outlet of the heat exchange body 110 exceeds a preset liquid threshold, increasing the gas temperature at the gas outlet of the heat exchange body 110;

[0098] And / or, when the amount of liquid at the gas outlet of the heat exchange body 110 exceeds a preset liquid threshold, the gas dew point temperature at the gas outlet of the heat exchange body 110 is lowered.

[0099] When the amount of liquid at the gas outlet end of the heat exchange body 110 exceeds a preset liquid threshold, the amount of liquid at the gas outlet end of the heat exchange body 110 can be reduced by increasing the gas temperature at the gas outlet end of the heat exchange body 110; the amount of liquid at the gas outlet end of the heat exchange body 110 can also be reduced by lowering the gas dew point temperature at the gas outlet end of the heat exchange body 110; or the gas temperature at the gas outlet end of the heat exchange body 110 can be increased and the gas dew point temperature at the gas outlet end of the heat exchange body 110 can be lowered at the same time, thereby quickly reducing the amount of liquid at the gas outlet end of the heat exchange body 110; thereby effectively avoiding fire of the engine 210 and improving safety.

[0100] When the amount of liquid at the gas outlet end of the heat exchange body 110 exceeds a preset liquid threshold, an alarm is sounded in time, thereby alerting the driver or people near the vehicle and improving safety.

[0101] The preset liquid threshold can be obtained by calibrating the EGR rate under different ambient temperatures and humidities in the engine 210 test or vehicle environmental test in the early stage, and obtaining the relationship between the condensed water amount at the gas outlet end of the heat exchange body 110 and the engine 210 misfire boundary under different working conditions.

[0102] When the heat exchange device 100 is turned on, the amount of liquid at the gas outlet is obtained as a basis for judging the condensation at the gas outlet of the heat exchange body 110. If the amount of liquid at the gas outlet does not reach the preset liquid threshold, the heat exchange device 100 is turned on or operated normally.

[0103] The liquid volume at the gas outlet is either instantaneous or calculated. Instantaneous values are instantaneous data at the time of monitoring within a preset interval; calculated values are the average, variance, standard deviation, mode, median, and other calculated values for all monitored data within the preset interval. The preset time can be customized based on your needs, such as 30s, 1min, or 80s. A shorter preset time improves control efficiency, while a longer preset time increases accuracy.

[0104] Further, such as Figure 5 As shown, based on the amount of liquid at the gas outlet of the heat exchange body 110, controlling the gas temperature and / or gas dew point temperature at the gas outlet of the heat exchange body 110 includes:

[0105] When the amount of liquid at the gas outlet of the heat exchange body 110 exceeds a preset liquid threshold, increasing the gas temperature at the gas outlet of the heat exchange body 110;

[0106] When the outlet temperature of the gas at the gas outlet end of the heat exchange body 110 exceeds a preset temperature threshold, the dew point temperature of the gas at the gas outlet end of the heat exchange body 110 is lowered.

[0107] The lower the gas dew point, the lower the temperature at which the first droplet appears, and the lower the temperature required for condensed water to form. When the outlet temperature of the heat exchange body 110 remains unchanged, the lower the gas dew point at the gas outlet of the heat exchange body 110, the less condensed water will be.

[0108] When the amount of liquid at the gas outlet is greater than the preset liquid threshold, the liquid monitor 120 alarms and increases the outlet temperature of the heat exchange body 110 so that the outlet temperature of the heat exchange body 110 gradually approaches or exceeds the current gas dew point temperature, thereby reducing the generation of condensed water.

[0109] If the outlet temperature of heat exchanger 110 exceeds a preset temperature threshold, and the amount of liquid at the gas outlet exceeds the preset threshold, and liquid monitor 120 continues to alarm, further increasing the outlet temperature of heat exchanger 110 may affect normal combustion in engine 210 and increase the tendency to knock. The preset temperature threshold is 30°C to 40°C.

[0110] Within a preset time interval, the amount of liquid at the gas outlet is obtained. When the amount of liquid at the gas outlet is less than or equal to the preset liquid threshold, the liquid monitor 120 does not alarm, and the opening size of the current liquid control component 140 remains unchanged, and the opening size of the first gas control component 150 remains unchanged.

[0111] Furthermore, lowering the gas temperature at the gas outlet end of the heat exchange body 110 includes: increasing the gas temperature at the gas outlet end of the heat exchange body 110 by reducing the liquid inlet amount of the heat exchange body 110 .

[0112] Furthermore, lowering the gas dew point temperature at the gas outlet of the heat exchange body 110 includes lowering the gas dew point temperature at the gas outlet of the heat exchange body 110 by reducing the exhaust gas content at the gas inlet of the heat exchange body 110 .

[0113] Furthermore, in the heat exchange device 100 , the liquid amount at the gas outlet of the heat exchange body 110 is obtained through the liquid monitor 120 .

[0114] By reducing the opening of the liquid control member 140 , the flow of the coolant in the heat exchange body 110 is reduced, the cooling capacity of the heat exchange body 110 is reduced, and the outlet temperature of the heat exchange body 110 is increased, thereby reducing the amount of condensed water.

[0115] By gradually reducing the opening of the first gas control element 150 , the EGR rate is reduced, the water vapor content in the mixed gas flowing out of the heat exchange body 110 is reduced, the gas dew point temperature at the gas outlet is lowered, and the amount of condensed water is reduced.

[0116] By controlling the opening of the second gas control element 220, the flow rate at the liquid inlet of the heat exchange body 110 is adjusted, thereby regulating the heat exchange efficiency of the heat exchange body 110 and adjusting the gas temperature at the gas outlet of the heat exchange body 110. Reducing the opening of the second gas control element 220 reduces the flow rate at the liquid inlet of the heat exchange body 110, lowering the heat exchange efficiency of the heat exchange body 110, increasing the gas temperature at the gas outlet of the heat exchange body 110, and thereby reducing the amount of condensed water. The temperature sensor 130 detects the outlet temperature of the heat exchange body 110.

[0117] When the outlet temperature of the heat exchanger 110 is below a preset temperature threshold and the EGR rate is below a preset EGR rate, the first gas control element 150 remains closed. The preset EGR rate is related to the control accuracy of the first gas control element 150, and can be, for example, 2% to 4%. If the outlet temperature of the heat exchanger 110 exceeds the preset temperature threshold and the outlet temperature of the heat exchanger 110 continues to rise, the combustion of the engine 210 will deteriorate. When the EGR rate is reduced to the preset EGR rate, the control accuracy of the first gas control element 150 is minimized. When the outlet temperature of the heat exchanger 110 cannot continue to increase, the EGR rate cannot be further reduced, and condensed water still exists, EGR is disabled.

[0118] Example 4:

[0119] Embodiment 4 of the present application provides a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of the heat exchange method are implemented.

[0120] Embodiment 5:

[0121] Embodiment 5 of the present application provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the heat exchange method are implemented.

[0122] Example 6:

[0123] like Figure 6 As shown, the sixth embodiment of the present application provides a vehicle 300, which includes the heat exchange device 100, or the heat exchange system 200, and performs the steps of the heat exchange method.

[0124] By adjusting the monitoring results of the liquid monitor 120 behind the heat exchange body 110, the heat exchange efficiency and EGR rate of the heat exchange body 110 can be adjusted, and the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body 110 can be accurately controlled. This will prevent fire caused by excessive condensed water due to an excessive EGR rate, and at the same time avoid the deterioration of vehicle fuel consumption caused by directly closing the first gas control component 150, thereby saving energy and improving vehicle safety.

[0125] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A heat exchange device (100), characterized in that: include: a heat exchange body (110), the heat exchange body (110) being used to exchange heat with gas; A liquid monitor (120) is provided, wherein the liquid monitor (120) is adapted to monitor the liquid at the gas outlet end of the heat exchange body (110) so as to control the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body (110).

2. The heat exchange device (100) according to claim 1, characterized in that: Also includes: An air outlet channel (111), wherein the air inlet end of the air outlet channel (111) is connected to the gas outlet end of the heat exchange body (110), and the liquid monitor (120) is arranged in the air outlet channel (111).

3. The heat exchange device (100) according to claim 1, characterized in that: Also includes: A temperature detection component (130) is provided in the air outlet passage (111), and the temperature detection component (130) is used to detect the air outlet temperature of the heat exchange body (110).

4. The heat exchange device (100) according to claim 1, characterized in that: The heat exchange body (110) comprises a gas inlet end, the gas inlet end is communicated with the gas outlet end, and the gas inlet end is used for supplying gas into the heat exchange body (110).

5. The heat exchange device (100) according to claim 4, characterized in that: Also includes: An air inlet channel (113), wherein the air outlet end of the air inlet channel (113) is connected to the gas inlet end of the heat exchange body (110).

6. The heat exchange device (100) according to claim 5, characterized in that: The air inlet channel (113) comprises a first air inlet channel (115), an air inlet end of the first air inlet channel (115) is used for introducing external air, and an air outlet end of the first air inlet channel (115) is connected to the gas inlet end of the heat exchange body (110).

7. The heat exchange device (100) according to claim 6, characterized in that: The air inlet channel (113) further comprises a second air inlet channel (114), the air inlet end of the second air inlet channel (114) being used for introducing exhaust gas, and the air outlet end of the second air inlet channel (114) being connected to the gas inlet end of the heat exchange body (110).

8. The heat exchange device (100) according to claim 7, characterized in that: The invention also includes a first gas control component (150), wherein the first gas control component (150) is arranged in the second air inlet passage (114), and the first gas control component (150) is used to control the opening degree of the position where the first gas control component (150) is located.

9. The heat exchange device (100) according to claim 1, characterized in that: The heat exchange body (110) is used for exchanging heat between liquid and gas.

10. The heat exchange device (100) according to claim 9, characterized in that: The heat exchange body (110) is used for exchanging heat between low-temperature liquid and high-temperature gas.

11. The heat exchange device (100) according to claim 9, characterized in that: The heat exchange body (110) comprises a liquid inlet end and a liquid outlet end which are interconnected. The liquid inlet end is used for allowing liquid to enter the heat exchange body (110), and the liquid outlet end is used for allowing liquid to flow out of the heat exchange body (110).

12. The heat exchange device (100) according to claim 11, characterized in that: Also includes: A liquid inlet channel (112), wherein the liquid outlet end of the liquid inlet channel (112) is connected to the liquid inlet end of the heat exchange body (110).

13. The heat exchange device (100) according to claim 12, characterized in that: Also includes: A liquid control member (140) is provided in the liquid inlet channel (112), and the liquid control member (140) is used to control the opening of the position where the liquid control member (140) is located.

14. The heat exchange device (100) according to claim 11, characterized in that: Also includes: A liquid outlet channel (116), wherein the liquid inlet end of the liquid outlet channel (116) is connected to the liquid outlet end of the heat exchange body (110).

15. The heat exchange device (100) according to any one of claims 1 to 14, characterized in that: The liquid monitor (120) includes a water immersion sensor, an infrared moisture detector, a water detector and / or a humidity sensor.

16. A heat exchange system (200), characterized in that: The heat exchange device (100) comprises an engine (210) and the heat exchange device (100) according to any one of claims 1 to 15, wherein the air inlet end of the engine (210) is connected to the air outlet end of the heat exchange device (100).

17. The heat exchange system (200) according to claim 16, characterized in that: The heat exchange device (100) comprises an air outlet channel (111) and a heat exchange body (110); the engine (210) is arranged at the air outlet end of the air outlet channel (111); and the heat exchange body (110) is arranged at the air inlet end of the air outlet channel (111).

18. The heat exchange system (200) according to claim 16, characterized in that: The heat exchange device (100) includes a liquid monitor (120), and the system further includes: a second gas control component (220), the second gas control component (220) being arranged in the gas outlet channel (111), the second gas control component (220) being located between the liquid monitor (120) and the engine (210), and the second gas control component (220) being used to control the opening degree of the position where the second gas control component (220) is located.

19. A heat exchange method, characterized in that: The method comprises: Based on the amount of liquid at the gas outlet of the heat exchange body (110), the gas temperature and / or the gas dew point temperature at the gas outlet of the heat exchange body (110) are controlled; the heat exchange body (110) is used to exchange heat with the gas.

20. The heat exchange method according to claim 19, wherein: The controlling of the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body (110) based on the amount of liquid at the gas outlet end of the heat exchange body (110) comprises: When the amount of liquid at the gas outlet end of the heat exchange body (110) exceeds a preset liquid threshold, increasing the gas temperature at the gas outlet end of the heat exchange body (110); And / or, when the amount of liquid at the gas outlet end of the heat exchange body (110) exceeds a preset liquid threshold, the gas dew point temperature at the gas outlet end of the heat exchange body (110) is lowered.

21. The heat exchange method according to claim 20, wherein: The controlling of the gas temperature and / or gas dew point temperature at the gas outlet end of the heat exchange body (110) based on the amount of liquid at the gas outlet end of the heat exchange body (110) comprises: When the amount of liquid at the gas outlet end of the heat exchange body (110) exceeds a preset liquid threshold, increasing the gas temperature at the gas outlet end of the heat exchange body (110); When the outlet temperature of the gas at the gas outlet end of the heat exchange body (110) exceeds a preset temperature threshold, the gas dew point temperature at the gas outlet end of the heat exchange body (110) is lowered.

22. The heat exchange method according to claim 20, wherein: Lowering the gas temperature at the gas outlet end of the heat exchange body (110) comprises: increasing the gas temperature at the gas outlet end of the heat exchange body (110) by reducing the amount of liquid entering the heat exchange body (110).

23. The heat exchange method according to claim 20, wherein: Lowering the gas dew point temperature at the gas outlet end of the heat exchange body (110) comprises: lowering the gas dew point temperature at the gas outlet end of the heat exchange body (110) by reducing the exhaust gas content at the gas inlet end of the heat exchange body (110).

24. The heat exchange method according to any one of claims 19 to 23, characterized in that: The heat exchange device (100) is applied to any one of claims 1 to 16, wherein the amount of liquid at the gas outlet end of the heat exchange body (110) is obtained through the liquid monitor (120).

25. A storage medium, characterized in that The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the heat exchange method according to any one of claims 19 to 24 are implemented.

26. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the heat exchange method according to any one of claims 19 to 24 are implemented.

27. A vehicle (300), characterized in that The vehicle (300) comprises the heat exchange device (100) according to any one of claims 1 to 15, or the heat exchange system (200) according to any one of claims 16 to 18, and performs the steps of the heat exchange method according to any one of claims 19 to 24.

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