CN111765029B - Cooling liquid preheating and waste heat recovery device and vehicle - Google Patents
Cooling liquid preheating and waste heat recovery device and vehicle Download PDFInfo
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- CN111765029B CN111765029B CN202010450556.6A CN202010450556A CN111765029B CN 111765029 B CN111765029 B CN 111765029B CN 202010450556 A CN202010450556 A CN 202010450556A CN 111765029 B CN111765029 B CN 111765029B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
- B60H1/06—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant directly from main radiator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
- F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention relates to the technical field of vehicles and discloses a cooling liquid preheating and waste heat recovery device and a vehicle. The cooling liquid preheating and waste heat recovery device comprises a first pipeline, a second pipeline, a connecting pipeline, a heating pipeline and a first waste heat recovery pipeline, wherein an engine water jacket is arranged on the first pipeline, cooling liquid in the engine water jacket is used for cooling an engine, an exhaust pipe water jacket is arranged on the second pipeline, the cooling liquid in the exhaust pipe water jacket is used for cooling an exhaust pipe, the connecting pipeline is used for connecting one end of the first pipeline and one end of the second pipeline, the heating pipeline is connected to the other end of the first pipeline and the other end of the second pipeline, the heating pipeline can selectively heat the cooling liquid in the heating pipeline, the first waste heat recovery pipeline is respectively communicated with the connecting pipeline and the heating pipeline, a first heat exchanger is arranged on the first waste heat recovery pipeline, and the first heat exchanger is connected to an automobile warm air system.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a cooling liquid preheating and waste heat recovery device and a vehicle.
Background
At present, fuel saving becomes the development trend of automobiles. In the field of traditional fuel vehicles, in order to improve the thermal efficiency of an engine, the compression ratio of the engine is continuously improved, and a supercharging technology becomes the mainstream. However, the energy generated by the combustion of the engine is 1/3 exhausted through the exhaust, 1/3 dissipated through the coolant.
The engine may undergo a warm-up process during the cold start phase. Fuel is combusted in the engine cylinder to generate heat which is transferred through the cylinder and combustion chamber walls to the coolant, which typically takes about 10 minutes to raise its temperature from ambient to 90 ℃. Too low a coolant temperature can result in poor engine lubrication, poor in-cylinder combustion, increased engine heat dissipation losses, and increased fuel consumption. Most fuel vehicles are provided with a three-way catalyst on an exhaust pipeline for purifying automobile exhaust. The ignition temperature of the three-way catalyst is 250 ℃, and before the three-way catalyst reaches the ignition temperature, the tail gas of an engine cannot be purified, and a large amount of exhaust pollutants are directly discharged into the atmosphere, so that serious atmospheric pollution is caused.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a coolant preheating and waste heat recovery apparatus and a vehicle, which can preheat coolant and recover heat of the coolant to provide warm air to a passenger compartment when the vehicle is started.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coolant preheating and waste heat recovery device comprising:
the first pipeline is provided with an engine water jacket, and cooling liquid in the engine water jacket is used for cooling the engine;
the second pipeline is provided with an exhaust pipe water jacket, and the cooling liquid in the exhaust pipe water jacket is used for cooling the exhaust pipe;
a connection pipe for connecting one end of the first pipe and one end of the second pipe;
the heating pipeline is connected to the other end of the first pipeline and the other end of the second pipeline and can selectively heat the cooling liquid in the heating pipeline;
and the first waste heat recovery pipeline is respectively communicated with the connecting pipeline and the heating pipeline, a first heat exchanger is arranged on the first waste heat recovery pipeline, and the first heat exchanger is connected to the automobile warm air system.
As a preferable scheme of the cooling liquid preheating and waste heat recovery device,
a first check valve is arranged between the heating pipeline and the second pipeline, and the cooling liquid in the heating pipeline can flow into the second pipeline;
and a second one-way valve is arranged between the heating pipeline and the first waste heat recovery pipeline, and the cooling liquid in the heating pipeline can flow into the first waste heat recovery pipeline.
As a preferable scheme of the device for preheating the cooling liquid and recovering the waste heat, a first heater and a first temperature sensor are arranged on the heating pipeline, and the first temperature sensor is configured to detect the temperature of the cooling liquid in the heating pipeline so as to control the on and off of the first heater.
As a preferable scheme of the cooling liquid preheating and waste heat recovery device, a second heater and a second temperature sensor are further disposed on the second pipeline, and the second temperature sensor is configured to detect the temperature of the cooling liquid in the second pipeline so as to control the on and off of the second heater.
As a preferred scheme of the cooling liquid preheating and waste heat recovery device, the cooling liquid preheating and waste heat recovery device further comprises a second waste heat recovery pipeline, two ends of the second waste heat recovery pipeline are respectively communicated with two ends of the second pipeline, a second heat exchanger is arranged on the second waste heat recovery pipeline, and the second heat exchanger is connected to the automobile warm air system.
As a preferable scheme of the cooling liquid preheating and waste heat recovery device, the cooling liquid preheating and waste heat recovery device further includes:
the two ends of the heat dissipation pipeline are respectively communicated with the heating pipeline and the connecting pipeline;
the radiator is arranged on the radiating pipeline;
the thermostat is arranged on the heating pipeline, when the temperature of the cooling liquid is lower than a preset temperature, the cooling liquid passing through the thermostat can flow into the second pipeline and/or the first waste heat recovery pipeline, and when the temperature of the cooling liquid is higher than the preset temperature, the cooling liquid passing through the thermostat can flow into the heat dissipation pipeline.
As a preferred scheme of the cooling liquid preheating and waste heat recovery device, an intermediate pipeline is further connected between the heat dissipation pipeline and the first waste heat recovery pipeline, and the cooling liquid in the heat dissipation pipeline can flow into the first waste heat recovery pipeline through the intermediate pipeline.
As a preferable scheme of the cooling liquid preheating and waste heat recovery device, the thermostat is a wax thermostat.
As a preferable scheme of the coolant preheating and waste heat recovery device, the relationship between the volume V1 of the exhaust pipe water jacket and the volume V2 of the engine water jacket is as follows: 3V1 is less than or equal to V2.
To achieve the above object, the present invention further provides a vehicle including the coolant preheating and waste heat recovery apparatus according to any one of the above aspects.
The invention has the beneficial effects that:
the invention provides a coolant preheating and waste heat recovery device, which comprises a first pipeline, a second pipeline, a connecting pipeline, a heating pipeline and a first waste heat recovery pipeline, wherein an engine water jacket is arranged on the first pipeline, an exhaust pipe water jacket is arranged on the second pipeline, and the first pipeline, the heating pipeline, the second pipeline and the connecting pipeline are sequentially communicated to form a heating circulation loop; first pipeline, heating pipeline, first waste heat recovery pipeline and connecting line communicate in proper order and form first waste heat recovery circulation pipeline, and the coolant liquid in the first waste heat recovery pipeline is behind first heat exchanger, and the heat in the coolant liquid can provide the warm braw for passenger cabin through first heat exchanger, has realized the recycle of coolant liquid waste heat, reduces the waste of the energy. In addition, in the heating circulation loop, the engine water jacket is communicated with the cooling liquid in the exhaust pipe water jacket, so that the exhaust pipe can be preheated, the exhaust temperature is increased, the ignition time of the three-way catalyst is shortened, the emission of the engine in a cold start stage is reduced, and the air pollution is reduced.
The invention also provides a vehicle which comprises the cooling liquid preheating and waste heat recovery device, so that the cooling liquid can be heated when the engine is in cold start, the warm-up time is shortened, the waste heat recovery of the cooling liquid can be realized, and the waste of energy is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a coolant preheating and waste heat recovery device provided in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a coolant circulation of the coolant preheating and waste heat recovery device in the cold start phase of the engine according to the embodiment of the invention;
FIG. 3 is a schematic diagram of a cycle of the coolant preheating and waste heat recovery device according to the embodiment of the invention when the engine reaches a warm state;
FIG. 4 is a schematic diagram of a cooling fluid cycle when the exhaust temperature exceeds 800 deg.C for a cooling fluid preheating and waste heat recovery device provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of a coolant circulation of the coolant preheating and waste heat recovery device provided by the embodiment of the invention when the engine is stopped;
fig. 6 is a schematic diagram of a cooling liquid circulation of the cooling liquid preheating and waste heat recovery device according to the embodiment of the present invention when the temperature of the cooling liquid is lower than 65 ℃.
In the figure:
10-engine water jacket; 20-exhaust pipe water jacket; 31-a first heat exchanger; 32-a second heat exchanger; 40-a first heater; 50-a first temperature sensor; 60-a second heater; 70-a second temperature sensor; 80-a heat sink; 91-a first one-way valve; 92-a second one-way valve; 93-a third one-way valve; 94-a fourth one-way valve; 95-a fifth one-way valve; 100-thermostat;
1-a first pipeline; 11-a first water pump; 2-a second pipeline; 21-a second water pump; 3-connecting a pipeline; 4-heating the pipeline; 5-a first waste heat recovery pipeline; 6-a second waste heat recovery pipeline; 7-a heat dissipation pipeline; 8-intermediate pipeline.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the present embodiment provides a coolant preheating and waste heat recycling apparatus, which includes a first pipeline 1, a second pipeline 2, a connecting pipeline 3, a heating pipeline 4 and a first waste heat recycling pipeline 5, wherein an engine water jacket 10 is disposed on the first pipeline 1, coolant in the engine water jacket 10 is used for cooling an engine, an exhaust pipe water jacket 20 is disposed on the second pipeline 2, coolant in the exhaust pipe water jacket 20 is used for cooling an exhaust pipe, the connecting pipeline 3 is used for connecting one end of the first pipeline 1 with one end of the second pipeline 2, the heating pipeline 4 is connected to the other end of the first pipeline 1 and the other end of the second pipeline 2, the heating pipeline 4 can selectively heat the coolant therein, the first waste heat recycling pipeline 5 is respectively communicated with the connecting pipeline 3 and the heating pipeline 4, the first waste heat recovery pipeline 5 is provided with a first heat exchanger 31, and the first heat exchanger 31 is connected to an automobile warm air system.
According to the coolant preheating and waste heat recovery device provided by the embodiment, the first pipeline 1, the heating pipeline 4, the second pipeline 2 and the connecting pipeline 3 are sequentially communicated to form a heating circulation loop, when an engine is started from a cold state, coolant in the engine water jacket 10 and the exhaust pipe water jacket 20 can pass through the heating pipeline 4, and the coolant is heated in the heating pipeline 4, so that the coolant is rapidly heated, the warm-up time of the engine is shortened, and the problem of poor lubrication of the engine caused by too low temperature of the coolant is avoided; first pipeline 1, heating pipeline 4, first waste heat recovery pipeline 5 and connecting line 3 communicate in proper order and form first waste heat recovery circulation circuit, and the coolant liquid in the first waste heat recovery pipeline 5 is behind first heat exchanger 31, and the heat in the coolant liquid can provide the warm braw for passenger cabin through first heat exchanger 31, has realized the recycle of coolant liquid waste heat, reduces the waste of the energy.
Further, be provided with first check valve 91 between heating pipeline 4 and the second pipeline 2, coolant in the heating pipeline 4 can flow into in the second pipeline 2, be provided with second check valve 92 between heating pipeline 4 and the first waste heat recovery pipeline 5, coolant in the heating pipeline 4 can flow into in the first waste heat recovery pipeline 5, through setting up first check valve 91 and second check valve 92, can avoid coolant in the second pipeline 2 and the coolant in the first waste heat recovery pipeline 5 to flow back to heating pipeline 4.
Further, the first pipe 1 is provided with a first water pump 11, the first water pump 11 can make the coolant in the connecting pipe 3 flow into the first pipe 1, the second pipe 2 is provided with a second water pump 21, and the second water pump 21 can make the coolant in the second pipe 2 flow into the connecting pipe 3.
Preferably, a third check valve 93 is further provided on the connecting line 3 to allow the coolant in the connecting line 3 to flow into the first line 1.
Further, a first heater 40 and a first temperature sensor 50 are disposed on the heating pipeline 4, the first temperature sensor 50 is electrically connected to the first heater 40, and the first temperature sensor 50 is configured to detect the temperature of the coolant in the heating pipeline 4 to control the on/off of the first heater 40. It can be understood that when the engine is started from a cold state, the temperature of the coolant is low, and at this time, the first heater 40 needs to be turned on to heat the coolant, so as to shorten the warm-up time of the engine; during the starting operation, the temperature of the coolant rises, and at this time, the first heater 40 needs to be turned off to stop heating the coolant, so as to avoid the influence of the too high temperature of the coolant on the cooling effect of the engine or the exhaust pipe.
Further, a second heater 60 and a second temperature sensor 70 are disposed on the second pipeline 2, the second temperature sensor 70 is electrically connected to the second heater 60, and the second temperature sensor 70 is configured to detect the temperature of the coolant in the second pipeline 2 to control the on/off of the second heater 60. By providing the second heater 60, the coolant in the heating circulation loop can pass through the first heater 40 and the second heater 60 in sequence, and the coolant is heated twice, so that the heating efficiency of the coolant is further improved, and the warm-up time of the engine is shortened.
Of course, in other embodiments, the number of heaters in the heating circulation loop may also be adjusted according to actual conditions, and is not limited to two.
Further, the cooling liquid preheating and waste heat recovery device further comprises a second waste heat recovery pipeline 6, two ends of the second waste heat recovery pipeline 6 are respectively communicated with two ends of the second pipeline 2, a second heat exchanger 32 is arranged on the second waste heat recovery pipeline 6, and the second heat exchanger 32 is connected to the automobile warm air system. Specifically, the second waste heat recovery pipeline 6 is communicated with the second pipeline 2 to form a second waste heat recovery circulation loop, and after the coolant in the exhaust pipe water jacket 20 passes through the second heat exchanger 32, heat in the coolant can provide warm air for the passenger compartment through the second heat exchanger 32, so that the waste heat of the coolant is recycled, and the waste of energy is reduced. A fourth check valve 94 is also provided on the second heat recovery pipe 6.
In the present embodiment, the first waste heat recovery circulation loop is mainly used for recovering heat of the coolant in the engine water jacket 10, and supplies the heat to the passenger compartment through the first heat exchanger 31; the second waste heat recovery circulation circuit is mainly used for recovering heat of the coolant in the exhaust pipe water jacket 20 and supplying warm air to the passenger compartment through the second heat exchanger 32.
Further, this coolant liquid preheats and waste heat recovery device still includes heat dissipation pipeline 7, radiator 80 and thermostat 100, the both ends of heat dissipation pipeline 7 communicate respectively in heating pipeline 4 and connecting line 3, radiator 80 sets up on heat dissipation pipeline 7, thermostat 100 sets up on heating pipeline 4, when the temperature of coolant liquid is less than preset temperature, the coolant liquid through thermostat 100 can flow in second pipeline 2 and/or first waste heat recovery pipeline 5, when the temperature of coolant liquid is higher than preset temperature, the coolant liquid through thermostat 100 can flow in heat dissipation pipeline 7.
Preferably, the thermostat 100 is a wax thermostat, with a preset temperature of about 85 ℃.
Further, an intermediate pipeline 8 is connected between the heat dissipation pipeline 7 and the first waste heat recovery pipeline 5, the cooling liquid in the heat dissipation pipeline 7 can flow into the first waste heat recovery pipeline 5 through the intermediate pipeline 8, and a fifth check valve 95 is further arranged on the intermediate pipeline 8.
The working process of the cooling liquid preheating and waste heat recovery device is briefly described in combination with different application scenes as follows:
(1) when the engine is started from a cold state, at which time the temperature of the coolant is usually lower than 30 ℃, the first opening of the thermostat 100 is opened and the second opening is closed, i.e., the coolant passing through the thermostat 100 can only flow into the second pipeline 2 and the first waste heat recovery pipeline 5, but cannot flow into the heat dissipation pipeline 7. Specifically, as shown in fig. 2, at this time, the first check valve 91, the second check valve 92 and the third check valve 93 are all opened, the fourth check valve 94 is closed, the first heater 40 and the second heater 60 are all opened, and the coolant passing through the thermostat 100 is divided into two parts, wherein one part of the coolant flows into the second pipeline 2, and the other part of the coolant flows into the first waste heat recovery pipeline 5 (as shown by the direction of the dotted arrow in fig. 2). The first heater 40 and the second heater 60 are simultaneously turned on, electric energy of the first heater 40 and the second heater 60 is converted into heat energy of the cooling liquid, meanwhile, fuel transfers the heat energy to the cooling liquid in an engine cylinder, the temperature of the cooling liquid can be quickly improved, and the warm-up time of the engine is shortened. In addition, the coolants in the engine water jacket 10 and the exhaust pipe water jacket 20 can be exchanged with each other, so that the exhaust pipe is preheated, the exhaust temperature is increased, the ignition time of the three-way catalyst is shortened, and the emission of the engine in a cold start stage is reduced. If warm air is needed in the passenger compartment, a driver can guide the heat of the first heat exchanger 31 into the passenger compartment by starting the air blower, so that the waste heat of the cooling liquid is recycled.
(2) When the engine is completely warmed up, the temperature of the coolant is greater than 85 ℃, the first opening of the thermostat 100 is closed, and the second opening is opened, i.e., the coolant passing through the thermostat 100 can only flow into the heat-radiating pipe 7. Since the temperature of the coolant is high at this time, the temperature of the coolant is rapidly increased even without heat input from the electric heater, and therefore, in order to avoid the influence of the excessively high temperature of the coolant on the usability of the engine, the coolant flows into the heat radiation pipe 7, and the radiator 80 takes part in heat radiation. Specifically, as shown in fig. 3, at this time, the first water pump 11 is opened, the first check valve 91, the fourth check valve 94 and the third check valve 93 are closed, the second check valve 92 and the fifth check valve 95 are opened, the first heater 40 and the second heater 60 are closed (the circulation path of the coolant is in the direction of the dotted arrow in fig. 3), the coolant in the engine water jacket 10 enters the heat dissipation pipe 7 after passing through the thermostat 100, and is divided into two parts at the intersection of the heat dissipation pipe 7 and the intermediate pipe 8, one part of the coolant dissipates heat through the radiator 80, and the other part of the coolant passes through the first heat exchanger 31, and warm air can be provided to the passenger compartment.
(3) During long-term operation of the engine, the coolant temperature may typically exceed 100 ℃ at higher speeds and loads, the exhaust temperature of the engine may continue to be at a higher temperature, and cooling of the exhaust gas may be required when an exhaust gas temperature sensor (not shown) detects an exhaust gas temperature exceeding 800 ℃. At this time, as shown in fig. 4, on the premise of (2), the second water pump 21 and the fourth check valve 94 are opened, and the second check valve 92 is closed, and at this time, the flow path of the coolant forms two circulation circuits, the first circulation circuit is the same as (2), and in the second circulation circuit, the coolant flows into the second heat exchanger 32 from the exhaust pipe water jacket 20, that is, the exhaust gas temperature is rapidly lowered by the second heat exchanger 32 while the engine cooling heat exchange is realized, and at this time, the circulation path of the coolant is in the direction of the broken line arrow in fig. 4.
(4) When the engine has just been shut down, the temperature of the engine and the coolant is still high, and this residual heat can be used to supply warm air to the passenger compartment. After the engine is stopped, as shown in fig. 5, the first check valve 91, the third check valve 93 and the fourth check valve 94 are closed, the second check valve 92 and the fifth check valve 95 are opened, the first heater 40 and the second heater 60 are closed, the first water pump 11 is opened, at this time, no external heat source can be input, the temperature of the coolant is continuously reduced, the thermostat 100 starts to be gradually closed, when the temperature of the coolant is lower than 80 ℃, the coolant passing through the thermostat 100 is divided into two parts, one part of the coolant flows into the heat dissipation pipeline 7, the other part of the coolant flows into the first waste heat recovery pipeline 5 (the circulation path of the coolant is in the direction of the dotted arrow in fig. 5), at this stage, the first heater 40 and the second heater 60 are closed, and the waste heat of the engine is completely utilized to provide warm air for the passenger compartment.
(5) When the temperature of the coolant is lower than 65 ℃, the energy provided by the coolant is insufficient to provide warm air for the passenger compartment, and at this time, if the warm air service is still required, as shown in fig. 6, the first check valve 91, the second check valve 92, the third check valve 93 and the fifth check valve 95 are closed, the fourth check valve 94 is opened, the first water pump 11 is closed, the second water pump 21 is opened, the second heater 60 is opened, and the coolant in the exhaust pipe water jacket 20 is circulated by the second water pump 21 (the circulation path of the coolant is in the direction of the dotted arrow in fig. 6), in the present embodiment, the relationship between the volume V1 of the exhaust pipe water jacket 20 and the volume V2 of the engine water jacket 10 is: 3V1 is less than or equal to V2, therefore, when the second heater 60 is switched on, the temperature of the cooling liquid can be quickly increased, and warm air can be provided for the passenger compartment through the second heat exchanger. Preferably, the temperature of the cooling liquid should be maintained between 65 ℃ and 80 ℃, that is, when the second temperature sensor 70 detects that the temperature of the cooling liquid is lower than 65 ℃, the second heater 60 is turned on to heat the cooling liquid, and when the second temperature sensor 70 detects that the temperature of the cooling liquid is higher than 80 ℃, the second heater 60 is turned off.
This embodiment still provides a vehicle, and this vehicle includes that above-mentioned coolant liquid preheats and waste heat recovery device, not only can realize the heating of engine cold start time to the coolant liquid, shortens warm-up time, can also realize the waste heat recovery of coolant liquid, reduces the waste of the energy.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A coolant preheating and waste heat recovery device, comprising:
the engine cooling system comprises a first pipeline (1), an engine water jacket (10) is arranged on the first pipeline, and cooling liquid in the engine water jacket (10) is used for cooling an engine;
the second pipeline (2) is provided with an exhaust pipe water jacket (20), and the cooling liquid in the exhaust pipe water jacket (20) is used for cooling the exhaust pipe;
a connecting line (3) for connecting one end of the first line (1) and one end of the second line (2);
a heating pipeline (4) connected to the other end of the first pipeline (1) and the other end of the second pipeline (2), wherein the heating pipeline (4) can selectively heat the cooling liquid in the heating pipeline;
the first waste heat recovery pipeline (5) is respectively communicated with the connecting pipeline (3) and the heating pipeline (4), a first heat exchanger (31) is arranged on the first waste heat recovery pipeline (5), and the first heat exchanger (31) is connected to an automobile warm air system;
the two ends of the heat dissipation pipeline (7) are respectively communicated with the heating pipeline (4) and the connecting pipeline (3);
a radiator (80) provided on the heat radiation pipe (7);
a thermostat (100) disposed on the heating line (4), wherein when the temperature of the coolant is lower than a preset temperature, the coolant passing through the thermostat (100) can flow into the second line (2) and/or the first waste heat recovery line (5), and when the temperature of the coolant is higher than the preset temperature, the coolant passing through the thermostat (100) can flow into the heat dissipation line (7);
an intermediate pipeline (8) is further connected between the heat dissipation pipeline (7) and the first waste heat recovery pipeline (5), and cooling liquid in the heat dissipation pipeline (7) can flow into the first waste heat recovery pipeline (5) through the intermediate pipeline (8).
2. The coolant preheating and waste heat recovery device according to claim 1,
a first check valve (91) is arranged between the heating pipeline (4) and the second pipeline (2), and the cooling liquid in the heating pipeline (4) can flow into the second pipeline (2);
and a second one-way valve (92) is arranged between the heating pipeline (4) and the first waste heat recovery pipeline (5), and the cooling liquid in the heating pipeline (4) can flow into the first waste heat recovery pipeline (5).
3. The coolant preheating and waste heat recovery device according to claim 1, wherein a first heater (40) and a first temperature sensor (50) are disposed on the heating pipeline (4), and the first temperature sensor (50) is configured to detect the temperature of the coolant in the heating pipeline (4) to control the on/off of the first heater (40).
4. The coolant preheating and waste heat recycling device according to claim 1, wherein a second heater (60) and a second temperature sensor (70) are further disposed on the second pipeline (2), and the second temperature sensor (70) is configured to detect the temperature of the coolant in the second pipeline (2) so as to control the on/off of the second heater (60).
5. The coolant preheating and waste heat recycling device according to claim 1, further comprising a second waste heat recycling pipeline (6), wherein two ends of the second waste heat recycling pipeline (6) are respectively communicated with two ends of the second pipeline (2), a second heat exchanger (32) is disposed on the second waste heat recycling pipeline (6), and the second heat exchanger (32) is connected to the vehicle heating system.
6. The coolant preheating and waste heat recovery device according to claim 1, wherein the thermostat (100) is a wax thermostat.
7. The coolant preheating and waste heat recovery device according to claim 1, wherein the relationship between the volume V1 of the exhaust pipe water jacket (20) and the volume V2 of the engine water jacket (10) is: 3V1 is less than or equal to V2.
8. A vehicle characterized by comprising the coolant preheating and waste heat recovery apparatus according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010450556.6A CN111765029B (en) | 2020-05-25 | 2020-05-25 | Cooling liquid preheating and waste heat recovery device and vehicle |
| PCT/CN2021/094155 WO2021238705A1 (en) | 2020-05-25 | 2021-05-17 | Cooling liquid preheating and waste heat recovery device, and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010450556.6A CN111765029B (en) | 2020-05-25 | 2020-05-25 | Cooling liquid preheating and waste heat recovery device and vehicle |
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| CN111765029A CN111765029A (en) | 2020-10-13 |
| CN111765029B true CN111765029B (en) | 2022-02-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765029B (en) * | 2020-05-25 | 2022-02-15 | 中国第一汽车股份有限公司 | Cooling liquid preheating and waste heat recovery device and vehicle |
| CN113314730B (en) * | 2021-03-19 | 2022-08-23 | 北京和瑞储能科技有限公司 | Temperature control pipeline system of flow battery |
| CN114483270B (en) * | 2021-12-27 | 2023-03-21 | 浙江零跑科技股份有限公司 | Engine exhaust heat recycling device |
| CN115434895B (en) * | 2022-09-01 | 2024-02-06 | 中车株洲电力机车有限公司 | Locomotive and compressor oil temperature control system and method |
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| WO2021238705A1 (en) | 2021-12-02 |
| CN111765029A (en) | 2020-10-13 |
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