CN110356187B - Air conditioning and heating system and control method thereof - Google Patents
Air conditioning and heating system and control method thereof Download PDFInfo
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- CN110356187B CN110356187B CN201810254030.3A CN201810254030A CN110356187B CN 110356187 B CN110356187 B CN 110356187B CN 201810254030 A CN201810254030 A CN 201810254030A CN 110356187 B CN110356187 B CN 110356187B
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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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
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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
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/18—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases
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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
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides an air conditioning and heating system and a control method thereof, wherein the air conditioning and heating system comprises an engine, a first electronic water pump, a second electronic water pump, a battery radiator, a fuel oil heater, a heating core body, a first tail gas pipe and a second tail gas pipe, wherein the engine, the battery, the fuel oil heater and the heating core body are connected into a first cooling liquid circulation loop through pipelines, the battery radiator and the battery are connected into a second cooling liquid circulation loop through pipelines, the first tail gas pipe and the heating core body share a blower, and the second tail gas pipe is wound on the battery. By the technical scheme, on one hand, heating in the vehicle can be realized by utilizing the heat of the engine, the heat of the battery and the heat of the exhaust gas of the engine, so that the heat utilization rate is improved, the electric energy consumption is reduced, and the endurance mileage of the whole vehicle is increased; on the other hand, the fuel heater can be used for realizing rapid heating in the vehicle, and the comfort of a user is ensured.
Description
Technical Field
The invention relates to the technical field of vehicle air conditioners, in particular to an air conditioner warm air system and a control method thereof.
Background
Air-conditioning heating systems are increasingly favored by various air-conditioning system design engineers as a necessary configuration for vehicles. For a hybrid electric vehicle, the existing air conditioning and heating system mainly has the following defects: 1. under the pure electric drive running mode, the energy of a battery is required to be consumed to heat water or wind to realize heating, so that the electric quantity of the whole vehicle is reduced, and the endurance mileage of the vehicle is reduced; 2. in a hybrid driving mode, although heating can be realized through water temperature heat of an engine, the heating efficiency is low, the energy conversion efficiency cannot be improved, and meanwhile, the heat of tail gas exhausted by the engine cannot be effectively utilized, so that heat waste is caused; 3. in alpine regions, the problem of cold start of an engine and a battery in winter cannot be effectively solved, and the vehicle cannot be always in the optimal working state; 4. the defrosting and demisting speed is slow, the sight of a user is influenced, and safety accidents are easily caused.
Disclosure of Invention
In view of this, the present invention provides an air conditioning heating system, which can reduce power consumption, increase the driving mileage of the entire vehicle, and improve user comfort.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides an air conditioner warm braw system, includes engine, first electronic water pump, second electronic water pump, battery radiator, fuel oil heater, warm braw core, first tail gas pipe and second tail gas pipe, the engine the battery fuel oil heater with the warm braw core connects into first coolant liquid circulation circuit through the pipeline, first electronic water pump does first coolant liquid circulation circuit provides circulating power, the battery radiator with the battery passes through the pipeline and connects into second coolant liquid circulation circuit, second electronic water pump does second coolant liquid circulation circuit provides circulating power, first tail gas pipe with a warm braw core sharing air-blower, second tail gas pipe winding is in on the battery.
Further, the first exhaust pipe is wound on the warm air core body.
Furthermore, the air-conditioning heating system further comprises a three-way valve, a first port of the three-way valve is communicated with the exhaust port of the engine, a second port of the three-way valve is communicated with the first tail gas pipe, and a third port of the three-way valve is communicated with the second tail gas pipe.
Furthermore, the air-conditioning warm air system also comprises a four-way valve, wherein a first port of the four-way valve is communicated with the engine, a second port of the four-way valve is communicated with the battery, a third port of the four-way valve is communicated with the fuel heater, a fourth port of the four-way valve is communicated with the warm air core body, the battery is communicated with the warm air core body through a first cooling liquid pipeline, the fuel heater is communicated with the warm air core body through a second cooling liquid pipeline, and the warm air core body is communicated with the engine through a third cooling liquid pipeline.
Further, the first electronic water pump is arranged between the engine and the first port of the four-way valve.
Compared with the prior art, the air-conditioning and heating system has the following advantages:
the heating in the vehicle can be realized by utilizing the heat of the engine, the heat of the battery and the heat of the waste gas of the engine, thereby improving the heat utilization rate, reducing the electric energy consumption and increasing the endurance mileage of the whole vehicle.
The fuel heater can be used for realizing rapid heating in the vehicle, and the comfort of a user is ensured.
The invention also aims to provide a control method of the air-conditioning warm air system, which can reduce the electric energy consumption, increase the endurance mileage of the whole vehicle and improve the comfort of users.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a control method of an air conditioning and heating system comprises the following steps:
detecting a current mode of the vehicle;
controlling two or more of the engine, the battery, the fuel heater, and the warm air core to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe according to a current mode of the vehicle.
Further, in a case where the current mode of the vehicle is the engine-driven travel mode, the control method further includes:
acquiring a user set temperature, an outdoor temperature and an indoor temperature;
controlling two or more of the engine, the battery, the fuel heater, and the warm air core to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe according to a current mode of a vehicle, includes:
if the temperature set by the user is lower than the first preset temperature, controlling the waste gas of the engine to flow through the first tail gas pipe;
if the temperature set by the user is higher than a second preset temperature, controlling the waste gas of the engine to flow through the first tail gas pipe, and controlling the engine and the warm air core body to exchange heat through cooling liquid, wherein the first preset temperature is lower than the second preset temperature;
if the temperature set by the user is between the first preset temperature and the second preset temperature, the outdoor temperature is higher than the first preset outdoor temperature, and the indoor temperature is higher than the first preset indoor temperature, controlling the waste gas of the engine to flow through the first tail gas pipe;
and if the temperature set by a user is between a first preset temperature and a second preset temperature, and the outdoor temperature is not more than a first preset outdoor temperature or the indoor temperature is not more than a first preset indoor temperature, controlling the waste gas of the engine to flow through the first tail gas pipe, and controlling the engine and the warm air core body to exchange heat through cooling liquid.
Further, in the case where the current mode of the vehicle is the hybrid driving travel mode, the control method further includes:
acquiring a temperature set by a user and a battery temperature;
controlling two or more of the engine, the battery, the fuel heater, and the warm air core to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe according to a current mode of the vehicle, including:
if the temperature set by the user is lower than a third preset temperature, controlling the waste gas of the engine to flow through the first tail gas pipe;
if the temperature set by the user is not less than the third preset temperature and the battery temperature is not less than the preset battery temperature, controlling the exhaust gas of the engine to flow through the first tail gas pipe, controlling the battery and the battery radiator not to exchange heat through cooling liquid, and controlling the engine, the battery and the warm air core body to exchange heat through the cooling liquid;
if the temperature set by the user is not less than the third preset temperature and the battery temperature is less than the preset battery temperature, controlling the waste gas of the engine to flow through the first tail gas pipe, controlling the battery and the battery radiator not to exchange heat through cooling liquid, and controlling the engine and the warm air core body to exchange heat through the cooling liquid.
Further, in the case that the current mode of the vehicle is the pure electric drive running mode, the control method further includes:
acquiring a temperature set by a user and an outdoor temperature;
controlling two or more of the engine, the battery, the fuel heater, and the warm air core to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe according to a current mode of a vehicle, includes:
if the temperature set by the user is lower than a fourth preset temperature and the outdoor temperature is higher than a second preset outdoor temperature, controlling the battery and the battery radiator not to exchange heat through cooling liquid, and controlling the battery and the warm air core body to exchange heat through the cooling liquid;
and if the temperature set by the user is not lower than the fourth preset temperature or the outdoor temperature is not higher than the second preset outdoor temperature, controlling the fuel oil heater and the warm air core body to exchange heat through cooling liquid.
Further, in the case that the current mode of the vehicle is a low-temperature electric-only start mode, the control method further comprises:
judging whether the engine is started or not;
controlling two or more of the engine, the battery, the fuel heater, and the warm air core to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe according to a current mode of the vehicle, including:
if the engine is not started, controlling the fuel oil heater and the battery to exchange heat through cooling liquid;
controlling engine exhaust gas flow through the second tailpipe if the engine is started.
Further, in case that the current mode of the vehicle is the rapid heating mode,
controlling two or more of the engine, the battery, the fuel heater, and the warm air core to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe according to a current mode of the vehicle, including:
and controlling the fuel oil heater, the engine and the warm air core body to exchange heat through cooling liquid, and controlling the exhaust gas of the engine to flow through the first tail gas pipe.
The control method is the same as the advantages of the air-conditioning and heating system compared with the prior art, and is not described again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 and fig. 2 are schematic structural diagrams of an air-conditioning heater system according to two embodiments of the present invention, in which thick solid line arrows indicate a coolant flow direction, thin solid line arrows indicate an engine exhaust gas flow direction, and thin dotted line arrows indicate a fuel flow direction;
FIG. 3 is a flowchart illustrating a method for controlling an air conditioning system according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of the air-conditioning heating system according to the embodiment of the invention when the vehicle is in the engine driving running mode;
fig. 5 is a flowchart of a control method of an air conditioning and heating system according to an embodiment of the present invention when a vehicle is in a hybrid driving mode;
fig. 6 is a flowchart of a control method of the air conditioning and heating system according to the embodiment of the present invention when the vehicle is in the pure electric drive driving mode;
fig. 7 is a flowchart of a control method of the air conditioning and heating system when the vehicle is in the pure electric start mode according to the embodiment of the present invention.
Description of reference numerals:
1-an engine, 2-a first electronic water pump, 3-a four-way valve, 4-a battery, 5-a battery radiator, 6-a fuel heater, 7-a fuel tank, 8-a warm air core, 9-a second electronic water pump, 10-a three-way valve, 11-a first tail gas pipe, 12-a second tail gas pipe, 13-a first cooling liquid pipeline, 14-a second cooling liquid pipeline and 15-a third cooling liquid pipeline.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The invention provides an air-conditioning warm air system which is used for a hybrid electric vehicle. As shown in fig. 1 and 2, the system includes an engine 1, a first electronic water pump 2, a second electronic water pump 9, a battery 4, a battery radiator 5, a fuel heater 6, a warm air core 8, a first exhaust pipe 11, and a second exhaust pipe 12. The engine 1, the battery 4, the fuel oil heater 6 and the warm air core body 8 are connected into a first cooling liquid circulation loop through pipelines, the first electronic water pump 2 provides circulating power for the first cooling liquid circulation loop, and cooling liquid circulates in the first cooling liquid circulation loop. The battery radiator 5 and the battery 4 are connected through a pipeline to form a second cooling liquid circulation loop, and the second electronic water pump 9 provides circulating power for the second cooling liquid circulation loop, and cooling liquid circulates in the second cooling liquid circulation loop. The fuel heater 6 and the engine 1 share a fuel tank 7.
The first exhaust pipe 11 and the warm air core 8 share a blower (not shown), and the engine exhaust gas flows through the first exhaust pipe 11, and the heat of the engine exhaust gas is carried into the cab by the air blown by the blower. In order to increase the heat exchange efficiency, the first offgas duct 11 may be a spiral duct. Here, the first exhaust pipe 11 may be wound around the warm air core 8 (as shown in fig. 1), or may be disposed near the warm air core 8 and independent of the warm air core 8 (as shown in fig. 2). The second offgas duct 12 is wound around the battery 4, and engine exhaust gas flows through the second offgas duct 12 to heat the battery 4.
By the technical scheme, on one hand, heating in the vehicle can be realized by utilizing the heat of the engine, the heat of the battery and the heat of the exhaust gas of the engine, so that the heat utilization rate is improved, the electric energy consumption is reduced, and the endurance mileage of the whole vehicle is increased; on the other hand, the fuel oil heater 6 can be used for realizing rapid heating in the vehicle, and the comfort of users is ensured.
In order to facilitate control of whether the engine exhaust gas flows through the first exhaust pipe 11 or the second exhaust pipe 12, or both the first exhaust pipe 11 and the second exhaust pipe 12, in an embodiment, the air conditioning heating system may further include a three-way valve 10, a first port of the three-way valve 10 being communicated with the exhaust port of the engine 1, a second port of the three-way valve 10 being communicated with the first exhaust pipe 11, and a third port of the three-way valve 10 being communicated with the second exhaust pipe 12. The three-way valve 10 may be controlled by an air conditioning controller (not shown).
In the present invention, the respective elements may be connected in various ways to form the first coolant circulation circuit. In one embodiment, as shown in fig. 1 and 2, the air-conditioning warm air system may further include a four-way valve 3, a first port of the four-way valve 3 is communicated with the engine 1, a second port of the four-way valve 3 is communicated with a battery 4, a third port of the four-way valve 3 is communicated with a fuel heater 6, a fourth port of the four-way valve 3 is communicated with a warm air core 8, the battery 4 is communicated with the warm air core 8 through a first cooling liquid pipeline 13, the fuel heater 6 is communicated with the warm air core 8 through a second cooling liquid pipeline 14, and the warm air core 8 is communicated with the engine 1 through a third cooling liquid pipeline 15. In this case, the coolant from the engine 1 may directly flow to the warm air core 8 through the four-way valve 3, may flow to the warm air core 8 through the four-way valve 3 and the battery 4 in sequence, or may flow to the warm air core 8 through the four-way valve 3 and the fuel heater 6 in sequence; the coolant from the warm air core 8 flows back to the engine 1 through the third coolant line 15. In one embodiment, the first electronic water pump 2 may be disposed between the engine 1 and the first port of the four-way valve 3, and further, may be disposed at a coolant outlet of the engine 1.
Based on the air-conditioning warm air system, the invention also provides a control method of the air-conditioning warm air system, which comprises the following steps.
Step S1: detecting a current mode of a vehicle, wherein the current mode of the vehicle comprises an engine 1 driving running mode, a hybrid driving running mode, a pure electric driving running mode, a low-temperature pure electric starting mode and a quick heating mode;
step S2: two or more of the engine 1, the battery 4, the fuel heater 6, and the heater core 8 are controlled to exchange heat with the coolant and/or engine exhaust gas is controlled to flow through the first and/or second tailpipe 11 and 12, depending on the current mode of the vehicle.
If it is determined in step S1 that the current mode of the vehicle is the engine 1-driven running mode (in which the engine 1 is operated and the battery 4 is not operated), step S2 may include the following substeps.
Step S201: acquiring a user set temperature, an outdoor temperature and an indoor temperature;
step S202: if the temperature set by the user is lower than the first preset temperature, controlling the waste gas of the engine to flow through the first tail gas pipe 11;
step S203: if the temperature set by the user is higher than the second preset temperature, controlling the exhaust gas of the engine to flow through the first tail gas pipe 11, controlling the engine 1 and the warm air core body 8 to exchange heat through cooling liquid, and heating the warm air core body 8 by using the engine 1, wherein the first preset temperature is lower than the second preset temperature;
step S204: if the temperature set by the user is between the first preset temperature and the second preset temperature, the outdoor temperature is higher than the first preset outdoor temperature, and the indoor temperature is higher than the first preset indoor temperature, controlling the exhaust gas of the engine to flow through the first tail gas pipe 11;
step S205: if the temperature set by the user is between the first preset temperature and the second preset temperature, and the outdoor temperature is not more than the first preset outdoor temperature or the indoor temperature is not more than the first preset indoor temperature, controlling the exhaust gas of the engine to flow through the first tail gas pipe 11, controlling the engine 1 and the warm air core body 8 to exchange heat through the cooling liquid, and heating the warm air core body 8 by using the engine 1.
That is to say, when the user sets for the temperature and is less than first when predetermineeing the temperature, show that not needing a lot of heats in the driver's cabin, control three-way valve 10 was opened this moment, only utilized the heat of engine waste gas can satisfy indoor heating demand, need not make the coolant liquid circulate in first coolant liquid circulation circuit to need not to start first electronic water pump 2, can save the required electric quantity of electron water pump work like this, for whole car saves the electric energy, promotes whole car duration.
When the user-set temperature is not less than the first preset temperature, the user's demand may not be met by relying only on the heat of the engine exhaust gas at this time.
Therefore, when the user set temperature is between the first preset temperature and the second preset temperature, and the outdoor temperature is greater than the first preset outdoor temperature, and the indoor temperature is greater than the first preset indoor temperature, all of the above three conditions are satisfied, indoor heating is performed using only the engine exhaust gas. Because outdoor temperature and indoor temperature are higher at this moment, indoor heating rate can be guaranteed without excessive heat, indoor heating is still carried out by using heat of engine waste gas, power consumption of the electronic water pump can be saved, and the endurance mileage of the whole vehicle is improved.
When the temperature set by the user is higher than the second preset temperature, or the outdoor temperature is not higher than the first preset outdoor temperature, or the indoor temperature is not higher than the first preset indoor temperature, any condition is reached, then the first electronic water pump 2 and the four-way valve 3 are controlled to be opened, so that the cooling liquid circulates between the engine 1 and the warm air core body 8, the warm air core body 8 is heated by using the heat of the engine, meanwhile, the three-way valve 10 is controlled to be opened, so that the exhaust gas of the engine flows through the first tail gas pipe 11, at the moment, double heating is realized, namely, the indoor heating is realized by using the heat of the engine and the heat of the exhaust gas of the engine at the same time.
Here, the first preset temperature, the second preset temperature, the first preset outdoor temperature, and the first preset indoor temperature may be set as needed. For example, the first preset temperature may be 20 ℃, the second preset temperature may be 25 ℃, the first preset outdoor temperature may be-10 ℃, and the first preset indoor temperature may be 15 ℃.
If it is determined in step S1 that the current mode of the vehicle is the hybrid driving travel mode in which both the engine 1 and the battery 4 are operated, step S2 may include the following substeps.
Step S211: acquiring a temperature set by a user and a temperature of the battery 4;
step S212: if the temperature set by the user is lower than the third preset temperature, controlling the waste gas of the engine to flow through the first tail gas pipe 11;
step S213: if the temperature set by the user is not less than the third preset temperature and the temperature of the battery 4 is not less than the preset temperature of the battery 4, controlling the exhaust gas of the engine to flow through the first tail gas pipe 11, controlling the battery 4 and the battery radiator 5 not to exchange heat through cooling liquid, controlling the engine 1, the battery 4 and the warm air core body 8 to exchange heat through the cooling liquid, and heating the warm air core body 8 by using the engine 1 and the battery 4;
step S214: if the temperature set by the user is not less than the third preset temperature and the temperature of the battery 4 is less than the temperature of the preset battery 4, the exhaust gas of the engine is controlled to flow through the first tail gas pipe 11, the battery 4 and the battery radiator 5 are controlled not to exchange heat through cooling liquid, the engine 1 and the warm air core body 8 are controlled to exchange heat through the cooling liquid, and the warm air core body 8 is heated by the engine 1.
That is to say, when the user sets for the temperature and is less than the third when predetermineeing the temperature, it does not need a lot of heats in the driver's cabin to show, and control three-way valve 10 opens this moment, only utilizes engine waste gas to carry out indoor heating, and need not make the coolant liquid circulate in first coolant liquid circulation circuit to need not to start first electronic water pump 2, can save the required electric quantity of electron water pump work like this, for the whole car saves the electric energy, promotes whole car continuation of the journey ability.
When the user-set temperature is not less than the third preset temperature, the user's demand may not be met by relying only on the heat of the engine exhaust gas at this time. Therefore, when the temperature set by the user is not less than the third preset temperature, the heat of the battery 4 is controlled not to be radiated through the battery radiator 5 (for example, the second electronic water pump 9 is controlled to be turned off), the first electronic water pump 2 and the four-way valve 3 are controlled to be turned on, so that the engine heat and the engine exhaust gas heat are supplied to the warm air core body 8 together, and the temperature in the cab is rapidly raised. It should be noted that when the temperature of the battery 4 is lower than the preset temperature of the battery 4, in order to ensure that the battery 4 can return to the proper working temperature and prolong the service life of the battery 4, the second port of the four-way valve 3 needs to be closed at this time without continuing to heat the warm air core 8 by using the heat of the battery.
Here, the third preset temperature, the preset battery 4 temperature, may be set as needed. For example, the third preset temperature may be 31 ℃ and the preset battery 4 temperature may be 10 ℃.
If it is determined in step S1 that the current mode of the vehicle is the electric-only driving mode (in which the battery 4 is operated and the engine 1 is not operated), step S2 may include the following substeps.
Step S221: acquiring a user set temperature and an outdoor temperature;
step S222: if the temperature set by the user is lower than the fourth preset temperature and the outdoor temperature is higher than the second preset outdoor temperature, controlling the battery 4 and the battery radiator 5 not to exchange heat through the cooling liquid, controlling the battery 4 and the warm air core body 8 to exchange heat through the cooling liquid, and heating the warm air core body 8 by using the battery 4;
step S223: and if the temperature set by the user is not lower than the fourth preset temperature or the outdoor temperature is not higher than the second preset outdoor temperature, controlling the fuel oil heater 6 to start, controlling the fuel oil heater 6 and the warm air core body 8 to exchange heat through cooling liquid, and heating the warm air core body 8 by using the fuel oil heater 6.
That is, when the temperature set by the user is lower than the fourth preset temperature and the outdoor temperature is higher than the second preset outdoor temperature, the battery heat is controlled not to be radiated through the battery radiator 5 (for example, the second electronic water pump 9 is controlled to be turned off), but the first electronic water pump 2 and the four-way valve 3 are controlled to be turned on, so that the battery heat is provided to the warm air core body 8, and the indoor heating is realized by the battery heat. When the temperature set by the user is not less than the fourth preset temperature or the outdoor temperature is not more than the second preset outdoor temperature, as long as one of the two conditions is met, the fuel oil heater 6 is used for heating the cooling liquid, and the cooling liquid flows into the warm air core body 8 for heating, so that indoor rapid heating is realized. This is because the heat of the battery 4 is insufficient to achieve rapid heating in the room under such conditions, and the heating using the heat of the battery 4 alone may cause user complaints.
Here, the fourth preset temperature and the second preset outdoor temperature may be set as needed. For example, the fourth preset temperature may be 25 ℃ and the second preset outdoor temperature may be-10 ℃.
In the pure electric mode, the battery 4 can be started only at a certain temperature, so that the problem of cold start of the battery 4 in winter or in a region with low temperature is solved, and the preheating function of the battery 4 is added to the air conditioning and heating system.
Specifically, if it is determined in step S1 that the current mode of the vehicle is the low-temperature electric-only start mode, step S2 may include the following sub-steps.
Step S231: judging whether the engine 1 is started;
step S232: if the engine 1 is not started, controlling the fuel oil heater 6 to start, controlling the fuel oil heater 6 and the battery 4 to exchange heat through cooling liquid, and heating the battery 4 by using the fuel oil heater 6;
step S233: if the engine 1 is started, the engine exhaust gas is controlled to flow through the second exhaust pipe 12, and the battery 4 is heated by the second exhaust pipe 12.
That is, it is determined in advance whether the engine 1 is started, and if not, the fuel heater 6 is used to heat the coolant, and the first electronic water pump 2 and the four-way valve 3 are turned on to preheat the battery 4, thereby achieving the starting function in the pure electric mode. If the engine 1 is detected to be started, another mode is adopted, namely the exhaust gas circulation heat of the engine is adopted to drive the battery 4 to be heated, so that the battery 4 is preheated, and fuel can be effectively saved by adopting the exhaust gas preheating mode.
If it is determined in step S1 that the current mode of the vehicle is the rapid heating mode, step S2 may include: the fuel heater 6 is controlled to be started, the fuel heater 6 and the warm air core body 8 are controlled to exchange heat through cooling liquid, the engine 1 and the warm air core body 8 are controlled to exchange heat through the cooling liquid, and exhaust gas of the engine is controlled to flow through the first tail gas pipe 11.
That is, in the rapid heating mode, the first electronic water pump 2 and the four-way valve 3 are controlled to be opened, so that the engine 1 and the fuel heater 6 heat the warm air core 8 at the same time, and the three-way valve 10 is controlled to be opened, so that the engine exhaust gas flows through the first exhaust pipe 11, and at this time, the temperatures inside and outside the warm air core 8 are high, so that the heating can be performed rapidly. The defrosting and demisting functions can be realized by completely introducing hot air into the defrosting and demisting air port.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An air-conditioning warm air system is characterized by comprising an engine (1), a first electronic water pump (2), a second electronic water pump (9), a battery (4), a battery radiator (5), a fuel oil heater (6), a warm air core body (8), a first tail air pipe (11) and a second tail air pipe (12), wherein the engine (1), the battery (4), the fuel oil heater (6) and the warm air core body (8) are connected into a first cooling liquid circulation loop through pipelines, the first electronic water pump (2) provides circulating power for the first cooling liquid circulation loop, the battery radiator (5) and the battery (4) are connected into a second cooling liquid circulation loop through pipelines, the second electronic water pump (9) provides circulating power for the second cooling liquid circulation loop, the first tail air pipe (11) and the warm air core body (8) share one air blower, and the second tail air pipe (12) is wound on the battery (4);
the air-conditioning warm air system further comprises a four-way valve (3), wherein a first port of the four-way valve (3) is communicated with the engine (1) through a first electronic water pump (2), a second port of the four-way valve (3) is communicated with a battery (4), a third port of the four-way valve (3) is communicated with a fuel heater (6), a fourth port of the four-way valve (3) is communicated with a warm air core body (8), the battery (4) is communicated with the warm air core body (8) through a first cooling liquid pipeline (13), the fuel heater (6) is communicated with the warm air core body (8) through a second cooling liquid pipeline (14), and the warm air core body (8) is communicated with the engine (1) through a third cooling liquid pipeline (15).
2. Air conditioning and heating system according to claim 1, characterised in that the first exhaust pipe (11) is wound around the heating core (8).
3. The air conditioning and heating system according to claim 1, further comprising a three-way valve (10), a first port of the three-way valve (10) communicating with an exhaust port of the engine (1), a second port of the three-way valve (10) communicating with the first offgas duct (11), and a third port of the three-way valve (10) communicating with the second offgas duct (12).
4. A control method of an air-conditioning and heating system, wherein the air-conditioning and heating system is the air-conditioning and heating system according to any one of claims 1 to 3, the control method comprising:
detecting a current mode of the vehicle;
controlling two or more of the engine (1), the battery (4), the fuel heater (6), the heater core (8) to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe (11, 12) according to a current mode of the vehicle.
5. The control method according to claim 4, characterized in that, in the case where the current mode of the vehicle is an engine (1) -driven travel mode, the control method further comprises:
acquiring a user set temperature, an outdoor temperature and an indoor temperature;
controlling two or more of the engine (1), the battery (4), the fuel heater (6), the heater core (8) to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe (11, 12) according to a current mode of the vehicle, comprising:
controlling the exhaust gas of the engine to flow through the first exhaust pipe (11) if the temperature set by the user is less than a first preset temperature;
if the temperature set by the user is higher than a second preset temperature, controlling the exhaust gas of the engine to flow through the first tail gas pipe (11), and controlling the engine (1) and the warm air core body (8) to exchange heat through cooling liquid, wherein the first preset temperature is lower than the second preset temperature;
if the temperature set by the user is between a first preset temperature and a second preset temperature, the outdoor temperature is higher than the first preset outdoor temperature, and the indoor temperature is higher than the first preset indoor temperature, controlling the waste gas of the engine to flow through the first tail gas pipe (11);
and if the temperature set by the user is between a first preset temperature and a second preset temperature, and the outdoor temperature is not more than a first preset outdoor temperature or the indoor temperature is not more than a first preset indoor temperature, controlling the exhaust gas of the engine to flow through the first tail gas pipe (11), and controlling the engine (1) and the warm air core body (8) to exchange heat through cooling liquid.
6. The control method according to claim 4, characterized in that, in a case where the current mode of the vehicle is the hybrid drive running mode, the control method further comprises:
acquiring the temperature set by a user and the temperature of a battery (4);
controlling two or more of the engine (1), the battery (4), the fuel heater (6), the heater core (8) to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe (11, 12) according to a current mode of the vehicle, comprising:
controlling the exhaust gas of the engine to flow through the first exhaust pipe (11) if the temperature set by the user is less than a third preset temperature;
if the temperature set by the user is not less than the third preset temperature and the temperature of the battery (4) is not less than the preset temperature of the battery (4), controlling the waste gas of the engine to flow through the first tail gas pipe (11), controlling the battery (4) and the battery radiator (5) not to exchange heat through cooling liquid, and controlling the engine (1), the battery (4) and the warm air core body (8) to exchange heat through the cooling liquid;
if the temperature set by the user is not less than the third preset temperature and the temperature of the battery (4) is less than the temperature of the preset battery (4), controlling the exhaust gas of the engine to flow through the first tail gas pipe (11), controlling the battery (4) and the battery radiator (5) not to exchange heat through cooling liquid, and controlling the engine (1) and the warm air core body (8) to exchange heat through the cooling liquid.
7. The control method according to claim 4, characterized in that, in the case where the current mode of the vehicle is the electric-only drive running mode, the control method further includes:
acquiring a temperature set by a user and an outdoor temperature;
controlling two or more of the engine (1), the battery (4), the fuel heater (6), the heater core (8) to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe (11, 12) according to a current mode of the vehicle, comprising:
if the temperature set by the user is lower than the fourth preset temperature and the outdoor temperature is higher than the second preset outdoor temperature, controlling the battery (4) and the battery radiator (5) not to exchange heat through cooling liquid, and controlling the battery (4) and the warm air core body (8) to exchange heat through the cooling liquid;
and if the temperature set by the user is not lower than the fourth preset temperature or the outdoor temperature is not higher than the second preset outdoor temperature, controlling the fuel oil heater (6) and the warm air core body (8) to exchange heat through cooling liquid.
8. The control method according to claim 4, characterized in that, in the case where the current mode of the vehicle is the low-temperature electric-only start mode, the control method further comprises:
judging whether the engine (1) is started;
controlling two or more of the engine (1), the battery (4), the fuel heater (6), the heater core (8) to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second tailpipe (11, 12) according to a current mode of the vehicle, comprising:
if the engine (1) is not started, controlling the fuel oil heater (6) and the battery (4) to exchange heat through cooling liquid;
-controlling the flow of engine exhaust gases through the second exhaust pipe (12) if the engine (1) is started.
9. The control method according to claim 4, wherein, in the case where the current mode of the vehicle is the rapid heating mode,
controlling two or more of the engine (1), the battery (4), the fuel heater (6), and the heater core (8) to exchange heat with a coolant and/or controlling engine exhaust gas to flow through the first and/or second exhaust pipes (11, 12) according to a current mode of a vehicle, includes:
controlling the fuel heater (6), the engine (1) and the heater core (8) to exchange heat through cooling liquid, and controlling the exhaust gas of the engine to flow through the first tail gas pipe (11).
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| CN110774866A (en) * | 2019-11-22 | 2020-02-11 | 东风商用车有限公司 | Pure electric vehicle cab heating structure |
| CN110985261A (en) * | 2019-11-25 | 2020-04-10 | 一汽解放汽车有限公司 | Parking heating system for commercial vehicle and control method thereof |
| CN113619356B (en) * | 2020-05-06 | 2023-12-12 | 比亚迪股份有限公司 | Auxiliary control system and method for air conditioner and vehicle |
| CN112031950B (en) * | 2020-09-09 | 2023-02-03 | 东风汽车有限公司 | Automobile waste heat recovery control method, electronic equipment and system |
| CN112248760A (en) * | 2020-10-28 | 2021-01-22 | 重庆长安汽车股份有限公司 | Automobile heating and ventilation loop structure and control method |
| CN114571942A (en) * | 2021-03-03 | 2022-06-03 | 长城汽车股份有限公司 | Automobile heat management system |
| CN113370754B (en) * | 2021-06-22 | 2023-05-12 | 一汽解放汽车有限公司 | Heating system and car |
| CN113650475B (en) * | 2021-08-31 | 2023-06-06 | 东风柳州汽车有限公司 | Vehicle thermal management control method, device, equipment and storage medium |
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