JPH0741795B2 - Vehicle air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is directed to purifying air in a vehicle compartment, releasing odors adsorbed by an air cleaning element, and ventilating a vehicle compartment when the vehicle interior is hot, such as when parked in the hot weather. The present invention relates to a vehicle air purifier.

[Prior Art] An air purifier equipped with an air purifying element having an adsorbing substance such as activated carbon captures odors, hydrocarbons and the like contained in the air by physical adsorption by the air purifying element. .

On the other hand, when the temperature rises, the air purification element
As indicated by the solid line A in the figure, substances such as odors and hydrocarbons adsorbed in the air purification element are activated and desorbed.

Therefore, if you leave the car for a long time in the hot summer sun,
Due to the radiation of the sun's rays, the temperature inside the passenger compartment becomes high, and the substances adsorbed by the air purification element are released into the passenger compartment, causing the passengers on board the vehicle to feel uncomfortable due to the high temperature.
It had the problem of giving offensive odors.

As a technique for solving these problems, Japanese Patent Publication No. 59-5145
No. 1 is known. In this known technique, one end communicates with the inside of the vehicle through an air purifier (air purification element), and the other end has an air passage for ventilation that is opened outside by switching to the inside of the vehicle or inside the vehicle. In this case, the blower is driven so that the air in the vehicle compartment is always discharged to the outside of the vehicle through the air purifier.

[Problems to be Solved by the Invention] However, in the known technique described above, the temperature inside the vehicle is set to a temperature at which the release of the substance adsorbed in the air purification element is stopped or a temperature at which the release capability is reduced. Even when the air temperature is lowered and the inside of the vehicle is mainly ventilated, the exhausted air is exhausted to the outside of the vehicle through the air purification element. Therefore, the air in the vehicle compartment receives a high pressure loss when passing through the air purification element.

Due to the pressure loss when passing through the air purification element, the ventilation time in the vehicle interior becomes long, and the blower operates for a long time, resulting in a large power consumption by the blower.

The present invention has been made in view of the above circumstances, and an object thereof is to ventilate the interior of a vehicle in a short time while suppressing the power consumption of the blower while releasing the substance adsorbed by the air purification element. The present invention provides an air purifier for a vehicle.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an air purification element provided with a substance having an adsorbing action such as activated carbon, and an air in the vehicle interior through the air purification element again. A first air passage that circulates in the passenger compartment, a second air passage that exhausts air in the passenger compartment to the outside of the passenger compartment via the air purifying element, and an air in the passenger compartment that bypasses the air purifying element and is outside the passenger compartment. A third air passage exhausted to the first air passage, air passage switching means for switching the first air passage, the second air passage, and the third air passage, and the first air passage, the second air passage, and the second air passage. 3 A blower for generating an air flow in the air passage and a temperature detecting means for detecting the temperature in the vehicle compartment are provided, and when the temperature in the vehicle compartment reaches a first set temperature, the air passage switching means is controlled to control the air passage. Select the second air passage and operate the blower. When the temperature in the vehicle compartment drops from the first preset temperature to the second preset temperature, the air duct switching means is controlled to select the third air duct and the blower is operated to operate the second air duct. A technical means including a control device that stops the operation of the blower when the temperature drops from the set temperature to the third set temperature is adopted.

[Operation] The control device according to the present invention having the above-described configuration, when the temperature in the vehicle interior reaches the first set temperature at which substances such as odors and hydrocarbons adsorbed in the air purification element are activated and released. Controls the air passage switching means to select the second air passage, and the blower operates.

As a result, the air having a high temperature inside the vehicle compartment passes through the air purification element and is exhausted to the outside of the vehicle compartment. At this time, the substances adsorbed in the air purification element are activated by the high temperature air passing through the air purification element and are released from the air purification element, riding on the air flow flowing from the vehicle interior to the vehicle exterior and then outside the vehicle interior. Is discharged to.

The air inside the vehicle compartment is discharged to the outside of the vehicle compartment, so that the temperature inside the vehicle compartment decreases. Then, when the temperature in the vehicle interior falls to the second set temperature, the control device controls the air passage switching means to select the third air passage and the blower operates.

As a result, the hot air in the vehicle compartment bypasses the air purification element, that is, is exhausted to the outside of the vehicle compartment without receiving a pressure loss when passing through the air purification element. For this reason, the flow velocity of the air discharged from the air inside the vehicle to the outside of the vehicle increases due to the decrease in pressure loss when passing through the air purification element, and a large amount of air inside the vehicle is released to the outside of the vehicle in a short time. As a result, the temperature inside the vehicle interior rapidly decreases.

Then, when the temperature inside the vehicle interior falls to the third preset temperature, the control device stops the operation of the blower.

EFFECTS OF THE INVENTION According to the present invention, the adsorption action of the air purification element is regenerated every time the temperature in the vehicle interior reaches the first set temperature, so that the life of the air purification element can be dramatically improved. . Further, since the components released from the air purification element are discharged to the outside of the vehicle compartment, the occupant does not have an unpleasant odor when the vehicle is mounted.

Further, when the temperature inside the vehicle interior drops to the second preset temperature, a large amount of air inside the vehicle interior is released to the outside of the vehicle interior and the vehicle interior 2
Since the temperature of the blower rapidly decreases, the operating time of the blower or the like becomes shorter than that in the conventional case, and the power consumption of the blower or the like can be suppressed low.

[Embodiment] Next, a vehicle air purifier of the present invention will be described based on an embodiment shown in the drawings.

FIGS. 1 to 6 show a first embodiment of the present invention.
The figure shows a schematic sectional view of a motor vehicle 1.

The vehicle interior 2 of the automobile 1 is provided so as to be able to communicate with the outside (outside the vehicle interior) via a ventilation duct 3. In addition, the automobile 1 is provided with an existing outside air communication port (not shown),
For example, when the ventilation duct 3 introduces the outside air (outside air) into the vehicle interior 2, the air in the vehicle interior 2 is released to the outside of the vehicle interior due to the increase in the internal pressure.

An air purifier 4 that removes dirt and odors from the air inside the vehicle interior 2 is installed at the rear of the vehicle interior 2. The air purifier 4 includes an air purifying element 5 having a substance having an adsorbing action such as activated carbon, sucks the air in the passenger compartment 2, passes the sucked air through the air purifying element 5, and again the passenger compartment. A first air passage 6 (shown by an arrow in FIG. 1) is provided for circulation. Further, the air purifier 4 includes a second air passage 7 (shown by an arrow in FIG. 2) that sucks the air in the vehicle interior 2, passes the sucked air through the air purification element 5, and exhausts the air to the outside of the vehicle interior. At the same time, the air in the passenger compartment 2 is sucked in,
A third air passage 8 (shown by an arrow in FIG. 3) that bypasses the sucked air to the air purification element 5 and exhausts the air to the outside of the vehicle compartment is provided.

A first damper 9 that blocks one of the first air passage 6 and the second air passage 7 and the third air passage 8 is provided at the confluence of the first air passage 6 and the third air passage 8. Driven by. A second damper 11 that blocks one of the first air passage 6 and the second air passage 7 and the third air passage 8 is also provided at the confluence of the second air passage 6 and the second air passage 7. Solenoid 12
Driven by. The first damper 9, the first solenoid 10, the second damper 11 and the second solenoid 12 constitute the air passage switching means of the present invention. In this embodiment, the first damper 10 blocks the inlet side of the third air passage 8 when the first solenoid 10 is not energized, and the second damper 11 is closed when the second solenoid 12 is not energized. It is provided so as to block the inlet side of the first air passage 6 and the second air passage 7.

Further, a blower 13 is disposed in a common portion of the first air passage 6, the second air passage 7, and the third air passage 8, and the air blower 13 is supplied with electric power so that the interior of the vehicle interior or the vehicle Generates an air flow toward the outdoors.

The first solenoid 10, the second solenoid 12, the blower 13
Is controlled by the control device 14. This controller
14 is an ignition switch 1 as shown in FIG.
5, the signal from the operation switch 16 of the air purifier 4 and the temperature sensor 17 which is the temperature detecting means of the present invention for detecting the temperature of the vehicle interior 2 is input to energize the first solenoid 10, the second solenoid 12, and the blower 13. Take control. The blower 13 is an in-vehicle battery
The energization is controlled via 18 and the changeover switch 19, and the changeover switch 19 is controlled to be opened and closed by the control device 14.

Next, the operation of the controller 14 will be described based on the flowchart of FIG.

First, in step S1, the ignition switch
Judge whether 15 is set to ON state or not. If the decision result in the step S1 is YES, a step S2 decides whether or not the operation switch 16 is set to the ON state. If the decision result in the step S2 is YES, a non-conductive output is generated in the first solenoid 10 and the second solenoid 12 in the step S3, and the changeover switch 19 is closed to energize the blower 13 to turn on the air. Set the purification mode and then return. If the decision result in the step S2 is NO, a non-conductive output is generated to the first solenoid 10 and the second solenoid 12 and the changeover switch 19 is closed to de-energize the blower 13 in the step S4. Stop and then return.

When the result of the determination in step S1 is NO, in step S5, the temperature T of the passenger compartment 2 detected by the temperature sensor 17 is such that substances such as odors and hydrocarbons adsorbed in the air purification element 5 are activated. It is determined whether the first set temperature To, which is actively released, has been reached. Then, if the decision result in the step S5 is NO, the process returns, and if YES, the step S5.
In 6, the first solenoid 10 produces a non-energized output, the second solenoid 12 produces a conductive output, and the changeover switch 19 is closed to energize the blower 13 to regenerate the air purification element 5. To set.

Then, in step S7, the ignition switch
Judge whether 15 is set to ON state or not. If the determination result in step S7 is YES, the process proceeds to step S2. If the determination result is NO, in step S8, the temperature T of the passenger compartment 2 detected by the temperature sensor 17 is adsorbed in the air purification element 5. It is determined whether or not the generated odor, hydrocarbon, and other substances have fallen to the second set temperature T1 at which they are not released.

If the decision result in the step S8 is NO, the process returns to the step S6,
If YES, in step S9, a conductive output is generated in the first solenoid 10 and the second solenoid 12, and the changeover switch 19 is closed to energize the blower 13 to set the ventilation mode in the passenger compartment.

Then, in step S10, it is determined whether or not the ignition switch 15 is set to the ON state.
If the determination result in step S10 is YES, the process proceeds to step S2. If the determination result is NO, in step S11, the temperature T of the passenger compartment 2 detected by the temperature sensor 17 does not give a vehicle occupant an uncomfortable feeling. It is determined whether the temperature has dropped to the third set temperature T2.

If the decision result in the step S11 is NO, the process returns to the step S9, and if YES, in the step S12, the first solenoid
A non-conductive output is generated at 10 and the second solenoid 12, and the changeover switch 19 is opened to de-energize the blower 13 to stop the system operation.

Next, the operation of the air purification mode will be described.

When the vehicle is running, the ignition switch 15 is turned on,
When the operation switch 16 is also turned on, the air purification mode is set by the controller 14 as described above, the first solenoid 10 and the second solenoid 12 are turned off, and the blower 13 is turned on. As a result, as shown in FIG. 1, the first air passage 6 is set, and the air in the vehicle interior 2 passes through the air purification element 5 and is released into the vehicle interior 2 again.

When the air in the passenger compartment 2 passes through the air purifying element 5, fine particles contained in the air are purified by the air purifying element 5.
The air in the passenger compartment 2 is purified because the odors and hydrocarbons contained in the air are adsorbed by the substances having an adsorbing action such as the activated carbon of the air purification element 5 while being captured by the filter medium.

Next, the operation of the regeneration mode and the ventilation mode will be described with reference to the time chart of FIG.

When the vehicle 1 is parked under the hot sun in the summer at time a1 shown in the figure, the temperature of the vehicle interior 2 gradually rises. And time a2
When the temperature T of the passenger compartment 2 reaches the first set temperature To, the regeneration mode is set by the control device 14, the first solenoid 10 is turned off, and the second solenoid 12 and the blower 13 are turned on, as described above. To do. As a result, as shown in FIG.
The second air passage 7 is set, and the high temperature air in the passenger compartment 2 passes through the air purification element 5 and is discharged to the outside of the passenger compartment.

When this high-temperature air passes through the air purification element 5,
The adsorbed component of the substance having an adsorbing action such as activated carbon contained in the air purification element 5 is activated and released. Then, the released component rides on the air flow in the second air passage 7 and is discharged to the outside of the vehicle compartment.

On the other hand, the temperature of the vehicle interior 2 is lowered due to the air in the vehicle interior 2 being discharged to the outside of the vehicle interior. When the temperature of the passenger compartment 2 drops to the second set temperature T1 at time a3, the ventilation mode is set by the control device 14 as described above, and the first
The solenoid 10, the second solenoid 12, and the blower 13 are turned on. As a result, as shown in FIG. 3, the third air passage 8 is set, and the air in the vehicle interior 2 bypasses the air purification element 5 and is discharged outside the vehicle interior. That is, the air discharged from the vehicle interior 2 to the outside of the vehicle compartment is exhausted to the outside of the vehicle compartment without receiving the pressure loss of the air purification element 5 when passing through the air purification element 5. Therefore, the flow velocity of the air discharged from the vehicle interior 2 to the outside of the vehicle interior is increased as compared with the above-mentioned regeneration mode, and a large amount of air in the vehicle interior 2 is discharged to the outside of the vehicle interior 2 in a short time. The temperature drops rapidly.

Then, the temperature of the vehicle interior 2 decreases due to the air inside the vehicle interior 2 being released to the outside of the vehicle interior, and when the temperature of the vehicle interior 2 decreases to the third set temperature T2 at time a4, as described above, The control device 14 turns off the first solenoid 10, the second solenoid 12, and the blower 13 to stop the system.

As described above, according to the present invention, the adsorption action of the air purification element 5 is regenerated every time the temperature inside the vehicle reaches the first set temperature To, so that the life of the air purification element 5 is dramatically improved. can do. Moreover, since the components released from the air purification element 5 are discharged into the vehicle interior 2, no unpleasant odor is given to an occupant when the vehicle is on board.

In addition, when the temperature of the passenger compartment 2 drops to the second set temperature T1,
A large amount of air in the vehicle interior 2 is released to the outside of the vehicle interior in a short time, and the temperature of the vehicle interior 2 rapidly decreases. Therefore, the temperature of the vehicle interior 2 is lowered to the second set temperature T1 in the regeneration mode. Then, the power supply time to the blower 13 and the like is shortened, and the power consumption of the vehicle-mounted battery 18 can be suppressed low.

FIG. 7 and FIG. 8 show a second embodiment of the present invention.

In this embodiment, the blower 13 is driven by the electric power generated by the solar cell 20 provided on the roof of the automobile 1. The diode 21 shown in FIG. 8 rotates when the blower 13 is rotated by wind or the like. This is for backflow prevention that prevents the current generated by the above from being applied to the solar cell 20.

Since the blower 13 of the present embodiment is supplied with electric power from the solar cell that converts solar energy into electric energy, there is no fear of over-discharge of the vehicle-mounted battery.

FIG. 9 shows a third embodiment of the present invention.

In this embodiment, a heating means 22 composed of an electric heater, a heater core, etc. is arranged at a position upstream of the air purification element 5. The heating means 22 is heated, and the first solenoid 10 and the second solenoid 12 are connected to each other. By controlling the energization to select the second air passage, the air purification element 5 is regenerated even in the winter when the temperature of the vehicle interior 2 does not rise.

FIG. 10 shows a fourth embodiment of the present invention.

The second air passage 7 of the present embodiment includes a blower 13 on the upstream side of the air purification element 5, and the third air passage 8 joins the second air passage 7 upstream and downstream of the air purification element 5. Equipped with
The upstream of the merging point on the upstream side and the downstream of the merging point on the downstream side are common to the second air passage. Further, the first air passage 6 is provided with a confluence portion with the second air passage 7 downstream of the air purification element 5, and the upstream of the confluence portion is common with the second air passage 7.

The control device 14 controls the first solenoid 10 and the second solenoid 10.
The air passage according to each mode is set by controlling the energization of the solenoid 12.

FIG. 11 shows a fifth embodiment of the present invention.

This embodiment is the same as the air purification element 5 of the fourth embodiment.
And one air blower 13 is installed between the confluence of the first air passage 6 and the second air passage 7, and one air blower 13 is installed in the third air passage 8 which is not common to the second air passage 7. However, one blower 13 operates according to the energization control of the control device 14 according to each mode.

FIG. 12 shows a sixth embodiment of the present invention.

In this embodiment, the power to the blower 13 is switched by the in-vehicle battery 18 and the solar cell 20 according to each mode and supplied.
The interlocking switch 23 for switching is controlled by the control device 14 together with the switching switch 19 to open and close.

In this embodiment, an example in which a damper for switching the air passage is driven by a solenoid is used as the air passage switching means, but other means such as an electric motor, a negative pressure actuator, or a hydraulic actuator may be used as the means for driving the damper. An actuator may be used.

[Brief description of drawings]

1 to 6 show a first embodiment of the present invention.
FIG. 1 is a sectional view of an automobile showing an outline of an air purifier, FIGS. 2 and 3 are diagrams for explaining the operation of switching air passages, FIG. 4 is a block diagram of a controller, FIG. 5 is a flowchart of the controller, and FIG. FIG. 6 is a time chart for explaining the operation of the embodiment, the seventh chart.
FIG. 8 is a schematic sectional view of an automobile showing a second embodiment, FIG. 8 is a block diagram of a control device for an air purifier shown in FIG. 7, and FIG. 9 is a schematic sectional view of an automobile showing a third embodiment. Figure 10 is the fourth
11 is a schematic sectional view of an air purifier of the fifth embodiment, FIG. 12 is a block diagram of a control device of the sixth embodiment, and FIG. 13 is an air purification element. 3 is a graph showing the relationship between the passage temperature and the desorption concentration. In the figure, 5 ... Air purification element, 6 ... First air passage, 7
…… Second air passage, 8 …… Third air passage, 9 …… First damper, 10
...... First solenoid, 11 ...... Second damper, 12 ...... Second solenoid, 13 ...... Blower, 14 ...... Control device

Claims (1)

[Claims] 1. An air purification element comprising: (a) a substance having an adsorbing action such as activated carbon; and (b) a first air passage for circulating the air in the vehicle interior again through the air purification element. (C) a second air passage for exhausting air in the vehicle interior to the outside of the vehicle via the air purification element; and (d) a second air path for bypassing the air purification element to exhaust the air in the vehicle interior to the outside of the vehicle interior. 3 air passages, (e) air passage switching means for switching the first air passage, the second air passage, and the third air passage, and (f) the first air passage, the second air passage, and An air blower for generating an air flow in the third air passage, and (g) a temperature detecting means for detecting a temperature in the vehicle compartment are provided, and when the temperature in the vehicle compartment reaches the first set temperature, the air passage switching means. To select the second air passage and operate the blower, When the temperature in the room drops from the first set temperature to the second set temperature, the air passage switching means is controlled to select the third air passage, and the blower is operated to operate the second set temperature. A vehicle air purifier comprising: a control device that stops the operation of the blower when the temperature is further lowered to the third preset temperature.