CN109515113B - Can switch over passive heat dissipation mode's of owner roof air conditioning system - Google Patents
Can switch over passive heat dissipation mode's of owner roof air conditioning system Download PDFInfo
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- CN109515113B CN109515113B CN201811424068.7A CN201811424068A CN109515113B CN 109515113 B CN109515113 B CN 109515113B CN 201811424068 A CN201811424068 A CN 201811424068A CN 109515113 B CN109515113 B CN 109515113B
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- folding type
- heat exchanger
- type heat
- air guide
- fan
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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
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00371—Air-conditioning arrangements specially adapted for particular vehicles for vehicles carrying large numbers of passengers, e.g. buses
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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
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00514—Details of air conditioning housings
- B60H1/00521—Mounting or fastening of components in housings, e.g. heat exchangers, fans, electronic regulators
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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
- B60H1/00321—Heat exchangers for air-conditioning devices
- B60H2001/0035—Heat exchangers for air-conditioning devices movable in and out of the air stream
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a roof air conditioning system capable of switching active and passive heat dissipation modes, which is arranged on a passenger car body and comprises a front and back folding type heat exchanger air guide sleeve, a front fan, a front and back folding type heat exchanger air guide groove, a front and back folding type heat exchanger module, a front and back folding type electric push-pull rod, a side folding type heat exchanger air guide sleeve, a middle fan, a side folding type heat exchanger module, a side folding type electric push-pull rod and a side folding type heat exchanger air guide groove. The invention mainly considers avoiding the active heat dissipation of the air conditioning system as much as possible, reduces the energy consumption of the air conditioning system on the roof by reducing the running time of the fan, and simultaneously reduces the pneumatic noise caused by the fan.
Description
The technical field is as follows:
the invention relates to comprehensive control of vehicle driving space environment, in particular to a roof air conditioning system capable of switching active and passive heat dissipation modes.
Background art:
the vehicle-mounted air conditioner consumes a large amount of energy, and besides the compressor, the fan supplies airflow to the heat exchanger and also consumes a large amount of energy. For large and medium-sized passenger cars, in order to ensure heat exchange of a roof air conditioner, a plurality of electric fans are usually used for driving airflow to flow, active heat exchange is realized, the power of 5 fans is calculated according to 255W of each fan of a common 10-meter passenger car to reach 1.275kW, and the electric energy consumed by a larger large passenger car is higher.
For a common vehicle-mounted condenser/evaporator, the windage resistance is about 95-141 Pa when the windage speed is 4-5 m/s, the heat exchange coefficient can reach 58-103W/(m ^2K) at the moment, and the wind speed is only equivalent to 3-level (breeze), so that the electric fan can be turned off when partial working conditions such as in-situ idling, low-speed driving or bus entering and exiting are considered, only passive heat dissipation is used, the energy consumption of the fan is saved, and the pneumatic noise is reduced.
The invention content is as follows:
the present invention provides a roof air conditioning system capable of switching between active and passive heat dissipation modes to solve the above problems in the prior art.
The technical scheme adopted by the invention is as follows: a roof air conditioning system capable of switching active and passive heat dissipation modes is arranged on a passenger car body and comprises a front and back folding type heat exchanger air guide cover, a front fan, a front and back folding type heat exchanger air guide groove, a front and back folding type heat exchanger module, a front and back folding type electric push-pull rod, a side folding type heat exchanger air guide cover, a middle fan, a side folding type heat exchanger module, a side folding type electric push-pull rod and a side folding type heat exchanger air guide groove, wherein the front fan comprises a plurality of front fans which are positioned behind the front and back folding type heat exchanger air guide cover, the front and back folding type heat exchanger air guide groove is positioned behind the front fan, the front and back folding type heat exchanger module is positioned behind the front and back folding type heat exchanger air guide groove, the front and back folding type electric push-pull rod is connected between the front and back folding type heat exchanger air guide groove and the front and back folding type heat exchanger module, the side folding type heat exchanger air guide cover is positioned behind the front and back folding type heat exchanger module, the middle fan is positioned behind the lateral folding type heat exchanger air guide sleeve, the lateral folding type heat exchanger air guide groove is positioned behind the middle fan, the lateral folding type heat exchanger modules are positioned on two sides of the middle fan, and the lateral folding type electric push-pull rod is positioned between the lateral folding type heat exchanger modules and the lateral folding type heat exchanger air guide groove.
The invention has the following beneficial effects: the invention mainly considers avoiding the active heat dissipation of the air conditioning system as much as possible, reduces the energy consumption of the air conditioning system on the roof by reducing the running time of the fan, and simultaneously reduces the pneumatic noise caused by the fan.
Description of the drawings:
fig. 1 is a schematic diagram of a rooftop air conditioning system capable of switching between active and passive heat dissipation modes.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a top view of fig. 1.
Wherein:
1-a passenger car body; 2-front and back folding type heat exchanger air guide sleeve; 3-front fan; 4: the front and back folding type heat exchanger air guide groove; 5: folding the heat exchanger module back and forth; 6: a front and rear folding electric push-pull rod; 7: a laterally folded heat exchanger dome; 8: a mid-set fan; 9: a side folding heat exchanger module; 10: a lateral folding electric push-pull rod; 11: the side folding type heat exchanger air guide groove.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, a roof air conditioning system capable of switching active and passive heat dissipation modes is mounted on a passenger car body 1, and comprises a front-back folding type heat exchanger air guide sleeve 2, a front-mounted fan 3, a front-back folding type heat exchanger air guide groove 4, a front-back folding type heat exchanger module 5, a front-back folding type electric push-pull rod 6, a side-back folding type heat exchanger air guide sleeve 7, a middle-mounted fan 8, a side-back folding type heat exchanger module 9, a side-back folding type electric push-pull rod 10 and a side-back folding type heat exchanger air guide groove 11, wherein the front-mounted fan 3 comprises a plurality of electric push-pull rods which are positioned behind the front-back folding type heat exchanger air guide sleeve 2, the front-back folding type heat exchanger air guide groove 4 is positioned behind the front-back fan 3, the front-back folding type heat exchanger module 5 is positioned behind the front-back folding type heat exchanger air guide groove 4, and the front-back folding type electric push-pull rod 6 is connected between the front-back folding type heat exchanger air guide groove 4 and the front-back folding type heat exchanger module 5, the lateral folding type heat exchanger air guide sleeve 7 is positioned behind the front and rear folding type heat exchanger modules 5, the middle-mounted fan 8 is positioned behind the lateral folding type heat exchanger air guide sleeve 7, the lateral folding type heat exchanger air guide groove 11 is positioned behind the middle-mounted fan 8, the lateral folding type heat exchanger modules 9 are positioned on two sides of the middle-mounted fan 8, and the lateral folding type electric push-pull rod 10 is positioned between the lateral folding type heat exchanger modules 9 and the lateral folding type heat exchanger air guide groove 11.
The vehicle roof air conditioning system capable of switching the active and passive heat dissipation modes can select an automatic control mode or a manual control mode, if the conditions are met, the heat exchanger is unfolded to be 90 degrees through the front and back folding type electric push-pull rods 6 and the lateral folding type electric push-pull rods 10, the fan does not work and consumes no energy, the heat exchanger completes heat exchange through natural wind or relative wind speed generated by vehicle movement, the fan and the air guide sleeve are fixed, and other structures move along with the heat exchanger.
The control method of the vehicle roof air conditioning system capable of switching the active and passive heat dissipation modes comprises the following steps:
1. parking operation
And detecting whether the heat exchange quantity brought by natural wind is greater than the heat exchange requirement, if the condition is met, unfolding the heat exchanger for 90 degrees, and enabling the fan not to work.
2. Running condition
Judging whether the heat exchanger is unfolded by a manual/sensor to influence the passing performance, if not, detecting whether the wind speed is greater than the heat exchange requirement and the relative wind speed V of the vehicle meets the condition that V is less than or equal to minus 10m/s and less than or equal to minus 4m/s (downwind working condition) or is less than or equal to 4m/s and less than or equal to V and less than or equal to 10m/s, and at the moment, unfolding the heat exchanger by 90 degrees and enabling the fan not to work; under the high-speed working condition, if the relative wind speed V of the vehicle meets V < -10m/s (downwind working condition), or V < 4m/s and V < 4m/s, or V > 11m/s, the heat exchanger is automatically folded, and the fan is started or stopped according to the heat exchange requirement.
The invention displays the calculated energy consumption reduction condition on the instrument desk, such as increasing the endurance mileage Xkm or Y%, and provides an energy-saving optimization suggestion to a driver if necessary to remind the driver to unfold or fold the heat exchanger in time.
The invention discloses a car roof air conditioning system capable of switching active and passive heat dissipation modes, which comprises the following components:
1. the heat exchanger can be unfolded under the original idling working condition, such as long-time parking waiting, the rotating speed of the fan is reduced according to different environment wind speeds and heat exchange requirements, and if the environment wind speed exceeds 4m/s, the fan is not needed to work, so that the energy consumption is greatly reduced;
2. the air resistance F is 0.5C rho Sv 2, the wind resistance power P is 0.5C rho Sv 3, taking the windward areas of two different heat exchangers as an example, and C is 1, and the relationship between the wind resistance power and the wind speed is shown in the following table.
Therefore, under the condition of low-speed running of the vehicle, such as the speed of the vehicle is lower than 20km/h, namely 5.56m/s in windless weather, the windward resistance of the heat exchanger is not higher than 211W and is far less than the power consumption of 1 fan. The windward resistance can be checked through the relative wind speed under the working condition of downwind or upwind, and the wind resistance power consumption is equivalent to the fan power consumption when the speed of the vehicle reaches 36km/h in windless weather, namely the wind speed is 10 m/s. In fact, the grid and the heat exchanger do not cause 100% of wind resistance, and the wind resistance coefficient C is smaller than 1, so that the energy-saving effect of passive heat dissipation in a larger vehicle speed range is ideal.
The air conditioner is adjusted from active heat dissipation to passive heat dissipation, so that the energy-saving effect is considerable for vehicles such as urban buses which are often in low-speed working conditions.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (1)
1. The utility model provides a roof air conditioning system of active passive heat dissipation mode of can switching, installs on passenger train automobile body (1), its characterized in that: the heat exchanger comprises a front-back folding type heat exchanger air guide sleeve (2), a front-mounted fan (3), a front-back folding type heat exchanger air guide groove (4), a front-back folding type heat exchanger module (5), a front-back folding type electric push-pull rod (6), a side-direction folding type heat exchanger air guide sleeve (7), a middle-mounted fan (8), a side-direction folding type heat exchanger module (9), a side-direction folding type electric push-pull rod (10) and a side-direction folding type heat exchanger air guide groove (11), wherein the front-mounted fan (3) comprises a plurality of air guide grooves which are positioned behind the front-back folding type heat exchanger air guide sleeve (2), the front-back folding type heat exchanger air guide groove (4) is positioned behind the front-back folding type heat exchanger air guide groove (3), the front-back folding type heat exchanger module (5) is positioned behind the front-back folding type heat exchanger air guide groove (4), and the front-back folding type electric push-pull rod (6) is connected between the front-back folding type heat exchanger air guide groove (4) and the front-back folding type heat exchanger module (5), the lateral folding type heat exchanger air guide sleeve (7) is positioned behind the front and rear folding type heat exchanger modules (5), the middle fan (8) is positioned behind the lateral folding type heat exchanger air guide sleeve (7), the lateral folding type heat exchanger air guide groove (11) is positioned behind the middle fan (8), the lateral folding type heat exchanger modules (9) are positioned on two sides of the middle fan (8), and the lateral folding type electric push-pull rod (10) is positioned between the lateral folding type heat exchanger modules (9) and the lateral folding type heat exchanger air guide groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424068.7A CN109515113B (en) | 2018-11-27 | 2018-11-27 | Can switch over passive heat dissipation mode's of owner roof air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424068.7A CN109515113B (en) | 2018-11-27 | 2018-11-27 | Can switch over passive heat dissipation mode's of owner roof air conditioning system |
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| Publication Number | Publication Date |
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| CN109515113A CN109515113A (en) | 2019-03-26 |
| CN109515113B true CN109515113B (en) | 2022-04-05 |
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| CN201811424068.7A Active CN109515113B (en) | 2018-11-27 | 2018-11-27 | Can switch over passive heat dissipation mode's of owner roof air conditioning system |
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2018
- 2018-11-27 CN CN201811424068.7A patent/CN109515113B/en active Active
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| CN109515113A (en) | 2019-03-26 |
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