JPH04197821A - Ventilating device for vehicle - Google Patents

Abstract

PURPOSE:To effectively restrain temperature rise inside the room of a vehicle and reduce heat loads so as to enhance the efficiency of an air-conditioner for the vehicle by forming a plurality of ventilating openings through the lower face of a vehicle, and introducing fresh air into the room of the vehicle through that ventilating opening around which air temperature is lowest. CONSTITUTION:A ventilating opening A12 is formed through the rear trunk portion of a vehicle body 11 and also a ventilating opening B13 is formed through the floor portion of the body 11. The ventilating openings A12, B13 are communicated with the respective portions of the inside of the room 14 of a vehicle and also have respective temperature sensors 15, 16 arranged in their respective air introducing passage portions. A ventilating fan 17 is mounted on the ventilating opening 12. A temperature measurement detection signal from each temperature sensor 12, 13 is supplied to a controller 18 so that the controller 18 controls rotation of the ventilating fan 17. The controller 18 compares temperature information measured by the temperature sensor 15 to that measured by the temperature sensor 16 and fresh air is introduced into the room 14 of the vehicle from that ventilating opening around which air temperature detected is judged to be low. Ventilation effects can thus be enhanced (for lowering temperature inside the room 14 of the vehicle).

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a ventilation system for a vehicle that controls the state of introduction of outside air into the interior of a vehicle, especially when the vehicle is parked in a high temperature environment. .

[Prior Art] For example, when a vehicle is parked under the scorching sun in summer, the interior of the vehicle becomes extremely hot. In such cases, it has been considered that air from outside the vehicle be introduced into the vehicle interior as a means of suppressing the rise in temperature within the vehicle interior. When such air from outside the vehicle is introduced, it is effective to keep the temperature of the introduced air as low as possible.

For this reason, it has been considered, for example, to introduce outside air from the back side of the tire house, which is kept at a relatively low temperature, as disclosed in Japanese Patent Application Laid-Open No. 59-118516. Also,
In the device disclosed in Japanese Patent Application Laid-Open No. 1-161809, it is considered to form two ventilation ports that open to the outside air, and to circulate the air inside the vehicle by introducing outside air from one of them and exhausting it from the other. .

However, vehicles are parked under a variety of conditions due to their nature, and the optimal location of the ventilation openings must be determined in response to various conditions such as road surface temperature, wind direction, residual heat from the engine, and direction of sunlight. The current situation is that it is still unclear. In other words, if the position of the ventilation opening is determined uniquely, there is a high possibility that the ventilation effect will not be fully exerted. Furthermore, even while driving, current air conditioner systems introduce outside air from the bonnet, which means that air heated by the bonnet must be introduced, resulting in a high heat load. is operating the air conditioner.

[Problem to be solved by the invention] This invention was made in view of the above points, and it is possible to effectively reduce the rise in temperature inside the vehicle even when the vehicle is parked under the scorching sun. The present invention aims to provide a ventilation system for a vehicle which can provide a sufficient vehicle interior ventilation effect.

[Means for Solving the Problems] A ventilation system for a vehicle according to the present invention includes at least two ventilation ports opening into a vehicle interior, a temperature sensor set in each of these ventilation ports, and a temperature sensor set in each of these ventilation ports. The temperatures measured are compared and outside air is introduced from the ventilation opening with the lowest air temperature.

[Function] The vehicle ventilation system configured in this manner has multiple ventilation openings formed on the underside of the vehicle, in the trunk, in the rear part, etc., so it is susceptible to various conditions when parking. The temperature of the air introduced from each vent varies depending on the temperature. This air temperature is detected by a temperature sensor set to each ventilation port and compared, and the ventilation port with the lowest air temperature is selected, and from this selected ventilation port, either outside air or air is introduced into the passenger compartment. It becomes like this. Therefore, the temperature rise inside the vehicle is effectively suppressed, and when applied to an air conditioner, the heat load is reduced, and a great effect is exerted on improving the efficiency of the vehicle air conditioner.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows its configuration, in which a ventilation port AI2 is formed in the rear trunk portion of the vehicle body 1, and a ventilation port B13 is formed in the floor portion of the vehicle body 11. These ventilation ports A12 and B13 are communicated with the inside of the vehicle compartment 14, and a temperature sensor A15 and a temperature sensor B16 are arranged in the air introduction passages of the ventilation ports 12 and 13, respectively. These vents 12 and 13
The temperature of the air introduced from each is measured. A ventilation fan 17 is also attached to the ventilation port Ai2. This fan 17 is controlled to rotate in forward and reverse directions, and when rotating in the forward direction, it takes in outside air through the ventilation port AI2 and exhausts the air inside the vehicle compartment 14 through the ventilation port B13. In addition, when the fan 17 rotates in the opposite direction, the ventilation port 13
Air is introduced from B and exhausted from ventilation port A1.2.

The temperature measurement detection signals from the temperature sensors 12 and 13 are supplied to a control device 18 composed of a microcomputer or the like, and the rotation of the ventilation fan 17 is controlled by this control device 18. .

The control device 18 has a function of comparing temperature information measured by the temperature sensors 15 and 16, and selects the ventilation port with the lowest detected temperature. Then, a command is given to the ventilation fan 17 to introduce outside air into the vehicle compartment 14 through the ventilation port where the detected air temperature is determined to be low. That is, the ventilation effect (lowering the temperature inside the vehicle compartment 14) is set to be large by taking in air from the ventilation port with the lower temperature.

For example, when it is determined that the temperature detected by the temperature sensor B16 set to the ventilation port B13 is lower than the temperature detected by the temperature sensor A15 set to the other ventilation port A12, the control device 18 reverses the ventilation fan 17. Rotate and open ventilation port A12
The air inside the vehicle compartment 14 is discharged from the vehicle compartment 14. That is, outside air is introduced into the vehicle compartment 14 from the ventilation port 13, and the vehicle compartment 1
4 to suppress the temperature rise inside.

Figure 2 shows the flow of operation of such a ventilation system. For example, when the ignition switch is turned off and the air conditioner of this vehicle is stopped, the process proceeds to step 101. The detected temperatures A and B of temperature sensor A15 and temperature sensor BIB are taken in. In step 102, the temperatures A and B taken in this way are compared, and if A>B, the process proceeds to step 103, and if A<B', the process proceeds to step 104. and,
When it is determined that the temperature of the ventilation port A12 is high, the fan 17 is rotated in the opposite direction in step 103, and the temperature of the ventilation port A12 is high.
Outside air is introduced from the vent B13, and when it is determined that the temperature of the ventilation port B13 is high, the fan 17 is rotated in the forward direction in step 104. That is, outside air is introduced through the ventilation port A12.

In this embodiment, the ventilation fan A]7 is set only in the ventilation port 12, or the ventilation fan A]7 is set only in the ventilation port 12, or the ventilation fan
12 as well, the ventilation fan B19 may be set. The rest is the same as the previous embodiment, so the same reference numerals are given.

FIG. 4 shows the flow of control in the control circuit 18. First, as shown in FIG.
When the temperature information from B15.16 is taken in, the process moves to the subroutine shown in (B) or (C) of the figure.

(B) In the subroutine shown in the figure, the detected temperatures A and B of the temperature sensors 12 and 13 are compared in step 211, and when it is determined that the temperature is higher than that, the process proceeds to step 212. Turn off fan A15 and turn on fan B19. Further, when it is determined that the temperature of B is high, the process proceeds to step 213 and turns on the fan A17.
Turn off fan B19. That is, the air temperatures of the ventilation ports A12 and B13 are compared, and outside air is introduced from the ventilation port determined to have a lower air temperature.

Further, in the subroutine shown in FIG. 12(C), the temperatures A and B detected by the temperature sensors 15 and 16 are compared in step 211, and the process proceeds to step 221 or 222 depending on the determination result.

In step 221, the fan A17 is rotated in the reverse direction and the fan B19 is rotated in the normal direction, so that outside air is introduced from the ventilation port B13. Further, in step 222, the fan A1
7 is rotated in the normal direction, and the fan B19 is also rotated in the reverse direction to introduce outside air from the ventilation port A12.

In the previous embodiments, by controlling the forward and reverse rotation of the fan,
We made it possible to select the ventilation opening that introduces outside air, but the fifth
It may be configured as shown in the figure.

That is, the ducts 21 and 22 connected to the ventilation port AL2 and the ventilation port BI3, respectively, are connected to the common duct 23.
It communicates with the inside of the vehicle via. Then, a ventilation fan 24 is installed in this common duct 23, and the duct 2
A damper 25 is provided at the branching part to 1 and 22, and this damper 25 allows the duct 23 to be connected to the duct 21 or 2.
This damper 25 is selectively controlled by the control device 18 so that outside air is introduced into the vehicle interior through either the ventilation openings 12 or 13.

In the apparatus configured in this manner, as in the previous embodiment, the ventilation openings for introducing outside air are selected based on the detected temperatures of the temperature sensors 15 and 16 set at the ventilation openings A and B12.13, respectively. That's what I do.

In the examples so far, it is assumed that the vehicle is parked, and the explanation is given to ventilate the interior of the vehicle, or it is explained that it is applied to the air conditioner installed in such a vehicle. You can also do it.

FIG. 6 shows an embodiment in which the air conditioner is applied to an air conditioner, in which the outside air introduction part of the air conditioner 31 is set to, for example, a first ventilation port 32 at the top of the hood near the front windshield, and a first ventilation port 32 located at the bottom of the vehicle body. 2 ventilation openings 33,
One of the air introduced from these ventilation ports 32 and 33 is selected by a damper 34, and the air conditioner 3
Let them be guided by the first part. The air conditioner 31 includes a proa fan 311 and an evaporator 312 to which compressed refrigerant is supplied.
Air is introduced from the ventilation port selected in step 4, cooled by the evaporator 312, and blown out into the vehicle interior.

That is, with this configuration, the temperature of the air introduced into the evaporator 312 is set to be low within a selectable range, and the heat load on the air conditioner 31 is reduced, improving cooling efficiency. be done.

In this embodiment, 15 and 16 are temperature sensors set at the ventilation ports 32 and 33, respectively, and detection signals from the temperature sensors 15 and 1.8 are supplied to the control device I8. The control device 18 controls the damper 34 so that air is introduced from the ventilation port whose air temperature is determined to be low.

[Effects of the Invention] As described above, according to the vehicle ventilation system according to the present invention,
Since the system introduces and circulates as low-temperature air as possible into the vehicle interior, it can effectively suppress the rise in interior temperature when parking in the hot sun, for example, and can also be used in combination with an air conditioner. If so, the heat load will be reduced and the air conditioner efficiency will be effectively improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram explaining a ventilation system according to an embodiment of the present invention, Fig. 2 is a flowchart showing the flow of its operation, Fig. 3 is a block diagram showing the second embodiment, and Fig. 4 is Flowcharts explaining the flow of the operation, Figures 5 and 6
The figures are configuration diagrams illustrating third and fourth embodiments of the present invention, respectively. 11...Vehicle body, 12.13...Ventilation vents A and B11
4... Vehicle interior, 15.1B... Temperature sensors A and B, 1
7.19...Ventilation fan, 18.Control device. Applicant's agent Patent attorney ± 8 Takehiko E Figure 1 Figure 2 (B) No. Figure (C)

Claims (1)

[Scope of Claims] At least two ventilation ports that open the vehicle interior to the outside air; a plurality of temperature sensors that are set in each of these ventilation ports and measure the temperature of the air taken in from each of the ventilation ports; A ventilation port selection means for comparing the detected temperatures from each sensor and selecting the ventilation port with the lowest temperature; and an outside air introduction means for introducing outside air from the ventilation port selected by this means. Ventilation system for vehicles.