JPH09142137A - Air cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform cooling of air in a car room through heat-exchange with air outside a car room. SOLUTION: Fans 16 and 18 on the indoor side and the outdoor side arranged coaxially with each other are integrally formed and formed of a material, such as copper, having excellent thermal conductivity. Thus, when air is sucked from the inside and the outside of a car room through rotation of the two fans 16 and 18, since heat-exchange between air inside and outside a car room is effected through the fans 16 and 18, air inside the car room is cooled through utilization of the heat-exchange.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner for cooling a passenger compartment, and more particularly to air for preventing or lowering the temperature inside the passenger compartment without introducing air outside the passenger compartment into the passenger compartment. Regarding a cooling device.

[0002]

2. Description of the Related Art The temperature inside a car left in the hot sun in midsummer rises to about 60 ° C. or higher. When the temperature inside the passenger compartment rises in this way, it is of course uncomfortable for the occupant who is subsequently on board, but also when the air conditioner is activated to lower the passenger compartment temperature, the passenger compartment temperature is lowered. There is a problem that it takes a long time to lower the temperature to a desired temperature.

In order to avoid such a problem from occurring, in the prior art, the temperature rise in the passenger compartment is minimized as follows.

That is, by opening a window of the vehicle to be left unattended, ventilation is constantly performed between the inside and the outside of the vehicle, thereby minimizing the rise in the temperature inside the vehicle.

Further, by arranging a curtain or a board for a sunshade along the windshield or the side glass in the passenger compartment, the sunlight radiated into the passenger compartment is blocked or reflected to increase the passenger compartment temperature. The method of minimizing is also adopted.

Further, the air inside the vehicle compartment may be forcedly ventilated by using a blower or the like to exhaust the air to the outside of the vehicle compartment to minimize the temperature rise in the vehicle compartment.

[0007]

In this way, the temperature inside the vehicle can be prevented from rising to some extent, but the ability to prevent the temperature rise is small. In addition, using a ventilation hole communicating with the inside and outside of the vehicle or opening a window for ventilation poses a security problem.

The present invention, which has been made in view of the above-mentioned problems, prevents heat from increasing in the vehicle interior temperature in a neglected state by exchanging heat between the vehicle interior air and the vehicle exterior air, and It is an object of the present invention to provide an air cooling device which is preferable even in crime prevention.

[0009]

The present invention for achieving the above object is constructed as follows for each claim. According to the first aspect of the present invention, a first fan on the vehicle interior side that sucks in and discharges the air existing in the vehicle interior of the stopped vehicle, and a second fan that rotates together with the first fan to suck and exhaust air outside the vehicle interior. And a drive unit that rotates the first fan and the second fan, and exchanges heat between the air inside the vehicle and the air outside the vehicle via the first fan and the second fan. It is characterized by performing.

According to a second aspect of the present invention, the first fan and the second fan rotate when the temperature inside the vehicle compartment exceeds a predetermined temperature.

According to a third aspect of the present invention, an air purifying means is provided in the air passage of the air in the vehicle compartment to clean the air in the vehicle compartment.

According to a fourth aspect of the present invention, the first fan and the second fan can be connected and separated from each other, and only the first fan rotates when separated from each other.

[0013]

According to the present invention having the above-described structure, each claim operates as follows. According to the first aspect of the present invention, the air in the vehicle compartment during parking is cooled by heat exchange with the air outside the vehicle compartment. In this way, the temperature rise in the passenger compartment is minimized, and the passenger's discomfort when the passenger is on board and the vehicle is started is minimized. In addition, since the interior and exterior of the vehicle compartment are separated by the first fan and the second fan,
The air inside the vehicle interior and the air outside the vehicle interior are not mixed, and the induction of theft or the like is prevented in advance, which is extremely preferable for crime prevention.

According to the second aspect of the invention, the first fan and the second fan are further rotated when the air temperature in the vehicle compartment exceeds a predetermined temperature. Therefore, the air cooling device can be operated only when it is necessary to cool the air in the vehicle compartment.

According to the third aspect of the invention, the air cleaning means is provided in the air passage of the vehicle compartment. Therefore, the air in the vehicle compartment is cooled and simultaneously cleaned.

According to the fourth aspect of the invention, the first fan and the second fan can be connected and separated from each other, and when separated from each other, the air inside the vehicle and the air outside the vehicle are separated. The air in the passenger compartment is cleaned without heat exchange between and.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing an automobile equipped with an air cooling device according to an embodiment, FIG. 2 is a side sectional view showing the same air cooling device, and FIG. 3 shows blades of a fan constituting the air cooling device. FIG.

The air cooling device 10 of the present embodiment is a device for cooling the air in the vehicle interior by exchanging heat between the air in the vehicle interior and the outside air. For example, as shown in FIG. , A rear roof pillar 3 supporting the roof 2 of the automobile 1 and the like.

As shown in FIG. 2, a blower 14 that sucks in and blows out air is housed in a case 12 of an air cooling device 10 mounted on the rear roof pillar 3. The blower 14 has a groove portion 1 formed at the center of the outer periphery.
It is rotatably supported by fitting the inner peripheral edge 3a of the mounting hole 4a. Further, the blower 14 is provided with the fan 1 on both sides of the groove 14a as a boundary.
It has 6,18. One of these fans 16 and 18 is an indoor side fan 16 (first
The other is the outdoor fan 18 (second fan) located outside the vehicle compartment.

As shown in FIGS. 3 and 4, the indoor fan 16 has a plurality of blades 16a arranged so as to extend in the radial direction. Therefore, blower 14
When the vehicle is rotated, the air in the vehicle compartment is caused to flow along the rotation axis direction and is sucked into the air cooling device 10, so that the blade 16
After passing through the space a, the air is discharged in the centrifugal direction from the air outlet 20 (flow passage) on the side of the fan. Although not shown, the outdoor fan 18 also has a plurality of blades (not shown) extending in the radial direction so that the outside air sucked in from the axial direction is discharged in the centrifugal direction.

For example, the air inside the passenger compartment is indicated by an arrow D shown in FIG.
After flowing through the vehicle interior side inlet 21 formed in the case 12, the air is sucked into the air cooling device 10 and is blown out from the vehicle interior side outlet 20 on the side of the indoor fan 16. It On the other hand, the outside air of the vehicle compartment flows in the direction of arrow D2, is sucked into the air cooling device 10 through the outside air inlet 22 and is blown out from the outside air outlet 23 on the side of the outdoor fan 18.

Further, between the blades of the fans 16 and 18 through which the sucked air passes, fins having a plurality of flat portions along the air flow direction are provided. Since the structure of the blades and the fins is the same as that of the indoor and outdoor fans, only the indoor side fan will be described here, and the description of the structure of the outdoor side fan will be omitted.

As shown in FIG. 3, the indoor fan 16
Blades 16a and fins 16b of, for example, copper,
It is made of a material with excellent heat conduction such as aluminum. Therefore, it is possible to efficiently exchange heat with the air passing between the blades 16a. That is,
Through the blades 16a and the fins 16b, heat exchange between the air inside and outside the vehicle can be efficiently performed. For example, if the temperature inside the vehicle is higher than the temperature outside the vehicle, the blade 1
6a and the fin 16b receive heat from the air inside the vehicle,
Heat is exchanged by radiating the received heat to the outside of the passenger compartment.

As shown in FIG. 2, the blower 14
Each of the fans 16 and 18 formed in [1] has protrusions 25a and 25b having a truncated cone shape in the rotation shaft portion. When such protrusions 25a and 25b are provided, the air cooling device 1
The direction of the flow of the air sucked to 0 can be smoothly changed to the centrifugal direction.

When the blower 14 is attached as in the embodiment, the inside of the vehicle compartment and the outside of the vehicle compartment are separated by the blower 14. Therefore, even if the blower 14 is rotated and air is simultaneously sucked from the inside and outside of the vehicle compartment, the air sucked from inside and outside the vehicle inside the air cooling device 10 is not mixed. Furthermore, if such a structure that does not allow communication between the inside and outside of the vehicle is adopted, it is possible to prevent theft and the like from occurring, which is extremely preferable in terms of crime prevention.

The blower 14 is rotated by a drive motor 27 (driving means) attached to the inside of the blower 14. The drive motor 27 is a brushless motor having a magnet 27a annularly attached to the end of the indoor fan 16 in the rotation axis direction and a coil 27b arranged on the inner peripheral side of the magnet 27a. When the motor having such a structure is used, the space required for providing the driving means is small, so that the air cooling device 10 can be downsized. Further, since the drive motor 27 does not have a rotary shaft for transmitting the rotational power to the blower 14, the space inside the coil 27b can be used as the indoor-side intake port 21 to further reduce the size of the air cooling device 10.

Further, as shown in FIG. 5, the drive motor 27 of the air cooling device 10 is connected to a power source 28 and a control unit 30 for controlling the on / off of the drive motor 27. The control unit 30 includes a key switch detection unit 31 that detects ON / OFF of a key switch of the automobile 1, a voltage detection unit 32 that detects a power supply voltage, and a vehicle interior temperature sensor 33 that detects a vehicle interior temperature. A vehicle outside temperature sensor 34 that detects the vehicle outside temperature and a set temperature detector 35 that detects a desired vehicle inside temperature set for the air conditioner are connected. Then, the control unit 30 has a key switch (not shown) as shown in the flowchart of FIG.
Is off, and the power supply voltage value is equal to or higher than a predetermined value,
When the vehicle interior air temperature is higher than the vehicle exterior air temperature, a switch (not shown) is turned on to supply power to the air cooling device 10 and rotate the blower 14.

The control unit 30 detects the set temperature of the air conditioner (not shown), and operates the air cooling device 10 only when the set temperature is equal to or higher than a predetermined temperature. With this configuration, the air cooling device can be operated only during the period when cooling is required, mainly in summer. That is, the season can be detected based on the set temperature value of the air conditioner, and the air cooling device 10 can be prevented from operating at a time when it is preferable that the air temperature inside the vehicle is rather high, such as winter.

Next, the operation of the present embodiment will be described. When the key switch detection unit 31 detects that the key switch of the automobile 1 is off (step 1), first, it is determined whether the setting mode of the air conditioner detected by the set temperature detection unit 35 is the cooling mode. Yes (step 2).

Here, if the setting of the air conditioner is heating,
Since it is not necessary to cool the passenger compartment, the blower 14 is not activated. On the other hand, if the air conditioner is in the cooling mode,
It is determined that it is a time when cooling is required, that is, a time when the vehicle interior needs to be cooled, and subsequently, the power supply voltage is a predetermined voltage V0.
It is determined whether or not the above (step 3).

Here, the detected power supply voltage is a predetermined voltage V
If it is 0 or less, the blower 14 is not operated because it is necessary to maintain a state in which more important operation such as engine start is possible. On the other hand, if the power supply voltage is equal to or higher than the predetermined voltage V0, then the vehicle interior temperature and the vehicle exterior temperature are compared (step 4). If the vehicle interior temperature is higher, cooling is necessary. , Supplying power to the air cooling device 10,
The blower 14 is rotated (step 5). When the blower 14 is rotated in this manner, the air inside and outside the vehicle compartment is introduced into the air cooling device 10.

That is, as can be seen from the control procedure described above,
When the blower 14 is rotated, the air temperature outside the vehicle compartment is always lower than the air temperature inside the vehicle compartment. Therefore, when heat exchange is performed between the inside air and the outside air, the air inside the vehicle compartment is cooled by the outside air. Each fan 16, 1 through which the sucked air passes
The blade of No. 8 is provided with a plurality of fins made of a material having excellent heat conduction such as copper and aluminum, so that heat can be efficiently transferred between the inhaled air and the blade. That is, heat exchange between air inside and outside the vehicle is efficiently performed via the blades and the fins. Furthermore, since the inside of the passenger compartment and the outside of the passenger compartment are separated by the blower 14,
The air taken in from inside and outside the vehicle at the same time does not mix. In addition, since the interior of the vehicle does not communicate with the outside of the vehicle, it is possible to prevent the occurrence of theft and the like, which is extremely preferable for crime prevention.

In addition, control by a timer that does not activate the switch of the air cooling device for a certain period after the key switch is turned off, or control that does not activate the air cooling device when parking for a long time is set to the above control. You may add.

Further, the air cooling device according to the present invention is not limited to the above embodiment, but can be variously modified within the scope of the invention described in the claims. In the embodiments described below, the same members as those in the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted.

For example, as shown in FIG. 7, if a filter 40 (air cleaning means) is attached to the air outlet 20 on the side of the indoor fan 16, the air in the vehicle compartment can be cooled while removing dust. That is, the air cooling device and the air cleaning device can be integrated.

As shown in FIGS. 8 and 9, a clutch mechanism may be provided between the indoor side fan 50 and the outdoor side fan 52 so that the two fans 50, 52 can be connected and separated freely. As shown in the figure, in the blower 14, the indoor fan 50 and the outdoor fan 52 are connected to the electromagnetic clutch 54.
Is supported on the same axis. This electromagnetic clutch 54
Is an electromagnet 55 provided on the indoor fan 50, a plate 56 made of a magnetic material such as iron provided on the outdoor fan 52, and a spring 57 interposed between the indoor fan 50 and the outdoor fan 52. have. Therefore,
When the electromagnet 55 is energized, the fans 50 and 52 are connected, and when the energization is stopped, the fans 50 and 52 are separated from each other. Therefore, for example, at the time when cooling is required mainly in the summer, the electromagnetic clutch 54 is energized so that the fans 50 and 52 are not heated.
It is possible to cool the inside of the vehicle while removing dust by integrally rotating the fan, and to maintain the disconnected state of both fans 50 and 52 to remove dust only at times such as winter when cooling is not required. Can be done.

Further, a solar cell may be used as a power source for the air cooling device. FIG. 10 is an embodiment thereof, and uses a solar cell 60 installed on the roof 2 of the automobile 1 as a power source. Although not shown, the drive motor of the air cooling device is connected to the solar cell 60 via the battery controller so that the drive motor is supplied with electric power having a stable voltage. As described above, when the solar cell 60 is used as a power source, the vehicle is parked in a state where it receives direct sunlight and the temperature inside the vehicle is higher than the temperature outside the vehicle. The device 10 can be operated to cool the vehicle interior. Since the electric power required for starting the automobile 1 is secured by a separate power source, all the electric power generated by the solar cell 60 can be used for operating the air cooling device 10. Therefore,
In the flowchart shown in FIG. 6, step 3 can be omitted.

[0039]

As described above, according to the present invention, the following effects can be obtained for each claim. According to the first aspect of the present invention, the air in the vehicle compartment when parked can be cooled by heat exchange with the air outside the vehicle compartment. In this way, the temperature rise in the passenger compartment can be minimized and passengers can board
It is possible to minimize the discomfort of the occupant at the time of starting the vehicle. Further, since the inside and outside of the vehicle compartment are separated by the first fan and the second fan, it is possible to prevent theft or the like from being triggered.

According to the second aspect of the invention, the first fan and the second fan are rotated when the air temperature in the vehicle compartment exceeds a predetermined temperature. Therefore, it is necessary to cool the air in the vehicle compartment. Only at certain times can the air cooler be activated.

According to the third aspect of the present invention, since the air purifying means is provided in the air passage in the vehicle compartment, the air in the vehicle compartment can be cleaned simultaneously with cooling.

According to the invention described in claim 4, the second fan can be separated from the first fan, and only the first fan can be rotated by the drive motor. Therefore, the air in the vehicle compartment can be cleaned only without heat exchange with the air outside the vehicle compartment.

[Brief description of the drawings]

FIG. 1 is a plan view showing an automobile equipped with an air cooling device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing the air cooling device according to the embodiment.

FIG. 3 is an enlarged view showing a fan of the air cooling device according to the embodiment.

FIG. 4 is a cross-sectional view showing a BB ′ cross section shown in FIG.

FIG. 5 is a block diagram showing means for controlling a drive motor.

FIG. 6 is a flowchart showing a control procedure of the air cooling device according to the embodiment.

FIG. 7 is a side sectional view showing an air cooling device of another embodiment.

FIG. 8 is a side sectional view showing an air cooling device of still another embodiment.

9 is a side sectional view showing another state of the air cooling device of FIG.

FIG. 10 is a plan view showing a solar cell used as a power source of an air cooling device.

[Explanation of symbols]

10 ... Air cooling device, 14 ... Blower, 16 ...
Indoor side fan (first fan), 18 ... Outdoor side fan (second fan), 20 ... Fan side outlet (circulation passage),
Reference numeral 21 ... Vehicle interior side inlet, 22 ... Vehicle exterior inlet, 23 ... Vehicle exterior outlet, 27 ... Drive motor (driving means), 30 ... Control section, 40 ...
Filter (air cleaning means), 54 ... Electromagnetic clutch,
60 ... Solar cell.

Claims (4)

[Claims] 1. A first fan (16) on the passenger compartment side that sucks in and discharges air existing in the passenger compartment of a stopped vehicle, and rotates together with the first fan (16) to suck and discharge air outside the passenger compartment. Second fan (18), first fan (16) and second fan (18)
And a drive means (27) for rotating the vehicle, and performs heat exchange between the air inside the vehicle and the air outside the vehicle via the first fan (16) and the second fan (18). An air cooling device characterized in that 2. The first fan (16) and the second fan (1)
8. The air cooling device according to claim 1, wherein the item (8) rotates when the temperature in the passenger compartment rises above a predetermined temperature. 3. The air purifying means (40) is provided in the air passage (20) for the air in the vehicle compartment to clean the air in the vehicle compartment that circulates. Air cooling system. 4. The first fan (16) and the second fan (1)
The air cooling device according to any one of claims 1 to 3, wherein (8) can be connected and separated from each other, and only the first fan (16) rotates when separated from each other.