JPH0569741A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To provide an air conditioner for a vehicle which can prevent a stench and a nasty small from being blown off into a cabin in starting the air conditioner with a simple construction. CONSTITUTION:An air conditioner for a vehicle is provided with a fluid exhaust port 7 for exhausting fluid including a stench and a nasty smell, i.e., air accumulated in a draft path 2 between a blower 3 and fluid blow-off port 6 to the outside of a cabin and a fluid suction port 8 for introducing fresh air from the outside of the draft path into an outer draft path to blow off the fresh air into the cabin while the fluid discharge port 7 is opened to discharge the fluid including the stench and nasty smell accumulated in the draft path 2 to the outside of the cabin, in addition to fundamental component members so far well known in the air conditioner for the vehicle.

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, and more particularly to a vehicle air conditioner capable of preventing an offensive odor and a bad odor blown from the vehicle air conditioner.

[0002]

2. Description of the Related Art When a conventional vehicle air conditioner is started,
Recently, there has been a big problem that an offensive odor staying in the ventilation path of an air conditioner is blown out to make passengers uncomfortable. Therefore, in order to solve this problem, various studies have been made. For example, at the time of starting the air conditioner, a separate purge door for discharging blown air containing a strange odor to the outside of the vehicle is provided, or JP-A-62-143712. As can be seen from Fig. 2, measures such as releasing air containing an offensive odor to the outside of the vehicle are being considered for several seconds until the air conditioner is started by detecting the opening of the door when the passenger is in the vehicle. However, the former has a drawback that a predetermined wind is not given to an occupant when an offensive odor is emitted, and the latter has a drawback that sufficient deodorization cannot be performed between the time of riding and the start of the air conditioner. There was a problem that it only worked when the door was opened.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the prior art, and to cause a bad odor and a strange odor at the time of starting an air conditioner for a vehicle to be blown out into a vehicle compartment with a simple structure. (EN) A vehicle air conditioner that can be prevented.

[0004]

In order to achieve the above-mentioned object, the present invention adopts the technical constitution as described below. That is, in a vehicle air conditioner provided with a blower for sending air into the ventilation passage, a heat exchanger for exchanging heat with the blown air, and a fluid outlet for blowing the heat-exchanged air into the passenger compartment. In addition, a fluid discharge hole for discharging the blown air to the outside of the ventilation passage and a fluid suction hole for sucking the air outside the ventilation passage into the passage are provided between the blower and the fluid outlet hole. It is a vehicle air conditioning system.

[0005]

Since the air conditioner for a vehicle according to the present invention adopts the technical configuration as described above, in addition to the basic components of the conventionally known air conditioner for a vehicle, During normal operation, the blower 3 and the fluid outlet 6
While partially or wholly closing the fluid discharge hole and the fluid suction hole provided between and, at the time of starting the vehicle air conditioner according to the present invention, the fluid discharge hole and the fluid suction hole are opened. Since the fresh air outside the ventilation passage is introduced into the ventilation passage while the fluid containing the offensive odor and the foul odor accumulated in the ventilation passage 2 is discharged to the outside of the vehicle compartment. ,
When the vehicle air conditioner is started, the offensive odor or bad odor blown into the vehicle interior is released to the outside of the vehicle, while fresh outside air is supplied to the vehicle interior for a predetermined period.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete example of a vehicle air conditioner according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic sectional view showing a specific example of a vehicle air conditioner 1 according to the present invention. In the drawing, a blower 3, an evaporator 4, a heater core 5, for example, a foot 61 in a ventilation passage 2. ,
Vent 62 or Defroster (DEF)
Fluid outlet 6 having various outlets such as 63
In a vehicle air conditioner 1 provided with the above, etc., a vehicle air conditioner in which a fluid discharge hole 7 and a fluid suction hole 8 are provided between the blower 3 and the fluid outlet hole 6 is shown. ing.

That is, in the vehicle air conditioner according to the present invention, in order to solve the above-mentioned problems in the conventional vehicle air conditioner, the vehicle air conditioner is started at the time of starting the vehicle air conditioner. Is constructed so as not to blow off the offensive odor and the bad odor accumulated in the ventilation passage 2 of the vehicle, or
In consideration of the characteristics of human sense of smell against such offensive odor, the air in the ventilation passage is gradually cooled so that the offensive odor and the offensive odor remaining in the ventilation passage 2 do not blow out into the passenger compartment at once. The air is blown out into the passenger compartment so that the passengers in the passenger compartment do not feel uncomfortable.

Therefore, in the vehicular air conditioner according to the present invention, in addition to the basic constituent members in the conventionally known vehicular air conditioner, the blower 3 and the fluid outlet 6 are provided. In the meantime, a fluid discharge hole 7 for discharging a fluid containing a strange odor or a bad odor, that is, air, which stays in the ventilation passage 2 to the outside of the vehicle compartment.
While the fluid discharge hole 7 is opened and the fluid containing offensive odors and malodors staying in the ventilation passage 2 is discharged to the outside of the vehicle compartment, fresh air outside the ventilation passage is discharged to the outside. A fluid suction hole 8 for introducing the fluid into the road and blowing it out into the vehicle compartment is provided.

In the present invention, the fluid discharge hole 7 is preferably provided in the vicinity of the evaporator where the offensive odor and the bad odor are most likely to stay. Also, in the vehicle air conditioner according to the present invention, dampers 9 and 10 are arranged in the fluid discharge hole 7 and the fluid suction hole 8, respectively. The first damper 9 arranged in the fluid discharge hole 7 is configured to selectively close either the fluid discharge hole 7 or the ventilation passage 2. It is preferable that the opening of the first damper is adjusted by an appropriate control means 13.

That is, in the vehicle air conditioner according to the present invention, the first damper 9 may close the entire surface of the fluid discharge hole 7, and by adjusting the opening degree. A part of the opening of the fluid discharge hole 7 may be closed. On the other hand, the second damper 10 arranged in the fluid suction hole 8 is configured so as to selectively close the opening portion of the fluid suction hole, and The damper is preferably configured so that its opening degree is adjusted by an appropriate control means 14.

That is, in the vehicle air conditioner according to the present invention, the second damper 10 is used in the same manner as the first damper.
May be one that closes the entire surface of the fluid suction hole 8, and is such that a part of the opening of the fluid suction hole 8 is closed by adjusting the opening. Good. Further, in the vehicle air conditioner according to the present invention, the first and second dampers 9 and 10 are provided with respective control means 1
It is preferable that each opening is configured to be controlled in a mutually related manner based on the calculation processing result of the calculation control means 12 that controls 3 and 14.

That is, in the vehicle air conditioner according to the present invention, the first and second dampers 9 and 10 are not only binary control of completely closed and completely opened, but also have a degree of offensive odor or strange odor. In consideration of the blower strength, human olfactory characteristics, etc., the opening of each damper may be different from each other, or each damper is configured to change individually or with time. You may.

As shown in FIG. 1, control means 13 and 14 for controlling the dampers 9 and 10 respectively perform central processing means (CPU) 12 which executes arithmetic processing according to a predetermined program.
The opening degree of each damper is adjusted and controlled in response to a command from. The opening of each of the dampers 9 and 10 is adjusted by, for example, a link type servo motor (not shown).

Therefore, in the first damper 9, the damper 9 is provided with the fluid discharge hole 7 at one turning end.
Is completely closed, and at the other end, the damper 9 is at a position where the ventilation passage 2 is completely closed, and the damper 9 has both swirling ends. It is possible to adopt an arbitrary turning angle between. On the other hand, the second damper 10 can take an arbitrary swivel angle including a state where the opening of the fluid suction hole 8 is completely closed.

Further, in the air conditioner for a vehicle according to the present invention, a predetermined amount of fresh air from outside the ventilation passage 2 is introduced into the fluid suction hole 8 into the ventilation passage 2 to supply the fluid. It is preferable to provide an intake means 11 for sucking outside air to blow the air into the passenger compartment through the blow-out hole 6, and the suction means for sucking outside air 11 is composed of a fan driven by an appropriate motor. May be.

In the vehicle air conditioner according to the present invention, the blower 3 and the outside air suction means 11 are simultaneously or simultaneously based on the calculation result of the central processing means (CPU) 12 described above. It is controlled individually. The operation and control method of the vehicle air conditioner according to the present invention will be described below. As is apparent from FIG. 1, when the first damper opens the fluid discharge hole 7, the fluid flowing from the blower 3 through the evaporator 4 into the ventilation passage is discharged from the fluid discharge hole 7 to the outside of the vehicle.

Further, when the first damper 9 completely closes the opening of the fluid discharge hole 7, the inflowing fluid flows in the ventilation passage 2 in a normal state. On the other hand, when the second damper 10 is opened, fresh air is sucked in from the outside of the vehicle, preferably through the outside air suctioning means 11, and is introduced into the vehicle interior. That is, when the vehicle air conditioner according to the present invention is normally used, the first damper 9 completely closes the opening of the fluid discharge hole 7, and the second damper 10 is used. The opening portion of the fluid suction hole 8 is completely closed.

Here, when the vehicle air conditioner 1 is started, the first mode is that the first damper 9 is located at a position where the ventilation passage 2 is completely closed, and the fluid is discharged. The hole 7 is set to be completely opened, while the second damper 10 opens the opening portion of the fluid suction hole 8 to a predetermined state with a predetermined opening degree. In this aspect, the fluid containing the offensive odor and the malodor retained in the ventilation passage 2 is discharged to the outside of the vehicle from the fluid discharge hole 7, while the fluid suction hole 8 is used to suck the outside air. Air outside the vehicle is supplied to the vehicle interior via the means 11.

After a lapse of a predetermined time, the original state is restored and normal air conditioning processing is executed. On the other hand, in another aspect of the vehicle air conditioner according to the present invention, the first and second dampers 9 and 10 are adjusted and controlled to appropriate opening degrees, and the control is performed as described above. Like
It is executed according to a program determined in consideration of human olfactory characteristics.

In the present embodiment, as shown in FIG. 2 as an example of operating conditions, first the first damper 9 causes the fluid to flow from immediately after the vehicle air conditioner is started to during the initial start time a. The fluid sucked from the blower by opening the discharge hole 7 is discharged from the fluid discharge hole 7 to the outside of the vehicle together with the fluid containing the offensive odor and the malodor remaining near the evaporator 4. Further, the second damper 10 also opens the opening of the fluid suction hole by a predetermined amount, and the fluid (air) outside the ventilation passage is supplied from the fluid suction hole 8 into the vehicle interior.

After that, after the start-up initial time T1 has elapsed, the opening degrees of both dampers gradually change to a certain fixed time T.
2, for example, 60 seconds after the start, the first and second
The dampers 9 and 10 close the fluid discharge hole 7 and the fluid suction hole 8, respectively, and normal air conditioning operation is performed.
Therefore, according to this aspect, at the time when the most strange odor is felt immediately after the vehicle air conditioner is started, the outside air is inhaled and the outside air is supplied into the vehicle interior, and as the strange odor is reduced, It is possible to eliminate the discomfort at the time of starting by returning to the operating state of.

The method for operating a vehicle air conditioner according to the present invention utilizes human olfactory adaptation, and even if an offensive odor component is scattered in the vehicle compartment, the amount of the odorous component cannot be sensed by humans. By gradually changing with, the initial effect can be achieved. The effect obtained by the vehicle air conditioner according to the present invention is as shown in FIG. 3, and in the conventional vehicle air conditioner, as shown in FIGS. 3 (A) and 3 (B), The intensity of the odor is determined by the fact that even after a considerable time has passed since the vehicle air conditioner was started,
It can be seen that the high level is maintained and the concentration is extremely high, but in the vehicle air conditioner according to the present invention, as shown in FIGS. 3 (C) and (D), The intensity of the odor is significantly lower than that in the conventional vehicle air conditioning system since the vehicle air conditioning system was started.
Also, it can be seen that the level drops rapidly with the passage of time.

The concentration is also halved as compared with the conventional one, which shows that the effect by using the vehicle air conditioner according to the present invention is remarkable. In the vehicle air conditioner in the above-mentioned specific example, the air conditioner is always operated when the air conditioner is started, but as another example, the odor in the vehicle air conditioner is stopped. For example, it is possible to monitor with an odor sensor and automatically operate even when the odor concentration reaches a predetermined upper limit concentration.

Further, in the vehicle air conditioner according to the present invention, the degree of opening / closing of the damper and the opening / closing control time of the damper are determined according to the concentration of the offensive odor or the bad odor of the fluid retained in the ventilation passage 2. Can be changed. That is, when the concentration of the offensive odor or the bad odor is low, for example, the opening degree adjustment period of each damper can be set to, for example, 60 seconds or less, and conversely, the concentration of the abnormal odor or the bad odor is high. In this case, for example, the opening degree adjustment period of each damper can be set to, for example, 180 seconds or more.

Further, in the present invention, the relationship between the temperature, humidity, etc. of the fluid and the conditions under which the offensive odor or malodor is likely to occur or the conditions under which it is likely to stay is preliminarily determined, even if the concentration of the offensive odor or malodor is not actual. Alternatively, the temperature or humidity may be detected and the vehicle air conditioner of the present invention may be operated when the result matches the condition. Further, in the present invention, the relationship between the air flow rate characteristic blown out into the vehicle compartment through the ventilation passage and the damper opening degree is obtained in advance, preferably in accordance with the blower blowing mode, and the result is obtained. It is stored in the storage means of the CPU which is the arithmetic processing means.

In the present invention, the suction means 1 for sucking outside air
The sub-fan as No. 1 starts its operation in conjunction with the time when the second damper 10 provided in the fluid suction hole 8 opens the fluid suction hole 8, and the sub-fan 11 when parked. It is also possible to contribute to the ventilation of the passenger compartment and the reduction of heat load by operating the. In the use during parking, the sub fan 11 can be driven by a power source other than the main battery, such as a solar cell.

Further, in the present invention, the amount of air blown from the blower and the amount of air sucked from the sub-fan 11 are controlled so that their total amount is as constant as possible. Further, it is preferable to gradually perform the adjustment switching of the opening degree in the first and second dampers, and it is necessary to gradually perform it for at least 60 seconds. In the present invention,
By the operation of the vehicle air conditioner, the fluid containing offensive odor and malodor remaining in the ventilation passage 2 is discharged from the fluid discharge hole 7, but during that time, no wind is supplied to the vehicle interior. The occupant complains of discomfort, but in the present invention, since the sub fan 11 operates, such a problem can be solved.

In such a case, especially in summer, the temperature of the air inside the vehicle is high, and the temperature of the air blown out from the vehicle air conditioner is high. Since the temperature of the air supplied to the room is about the outside air temperature at the highest, it is possible to avoid making passengers uncomfortable. The operation procedure of the vehicle air conditioner according to the present invention will be described below with reference to the flowchart of FIG.

After the start, in step 1, initialization is performed. In the initial setting, the discharge mode is set, and specifically, the first damper 9 is set in the closed position of the ventilation passage 2 and the fluid discharge hole 7 is set in the fully opened position. Yes, the second damper 10 is set to the open position. Next, at step 2, it is judged whether or not the drive switch of the vehicle air conditioner is pressed, and if the vehicle air conditioner is not turned on,
Return to step 1.

If the vehicle air conditioner is turned on in step 2, the counter is started, and at the same time, the blower 3 is turned on in step 3 and at the same time, in step 4, the outside air suctioning means 11 is turned on. In response to this operation, the evaporator is actuated and the fluid retained in the ventilation passage 2 is discharged from the fluid discharge hole 7 to the outside of the vehicle compartment, while the suction means 11 for sucking outside air in the outside fluid suction hole 8 is used. By operating the sub-fan, the outside air is sucked into the outside ventilation passage 2 and supplied into the vehicle compartment through the fluid outlet 6.

In step 5, the counter measures the elapsed time X, and the elapsed time X from the time when the vehicle air conditioner is turned on is the predetermined fully open period a of the second damper, That is, it is determined whether or not a time period in which the second damper is fully opened has elapsed since the vehicle air conditioner was turned on. The fully open period a of the second damper is T1 in FIG.
Is the period corresponding to, the initial air volume is a constant period,
For example, it is set to say 10 seconds.

Then, in step 5, when the elapsed time X has not yet passed the predetermined time a, the process returns to step 3 and the above steps are repeated. See step 5
If the elapsed time X has passed the predetermined time a, the process proceeds to step 6 to determine whether the elapsed time X has passed the opening / closing degree adjustment period b of the first and second dampers. To judge.

The opening / closing degree adjustment period b of each damper is, as described above, for the first damper 9, the fluid discharge hole 7
Is a period in which the openness of the ventilation passage 2 is gradually decreased, and conversely the openness of the ventilation channel 2 is gradually increased, and the function of the openness is represented by α (X). Regarding the second damper 10, it is a period in which the openness of the fluid suction hole 8 is gradually decreased, and the function of the openness is represented by β (X).

Further, in the present invention, the opening / closing degree adjustment period b of the damper is a time measured from the start of the operation of the vehicle air conditioner, and is set to, for example, 60 seconds. is there. Then, in step 6, when the elapsed time X has not passed the predetermined time b, the process proceeds to step 7 and the opening degree α (X−a) of the first damper 9 is set. Further, the opening degree β (X-a) of the second damper 10 is set to adjust the opening / closing angle of each damper.

Then, the counter value for the elapsed time X is incremented by 1, the process returns to step 6, and the steps of steps 6 and 7 are repeated while changing the openings of the first and second dampers 9 and 10. adjust. In step 6, when the elapsed time X has passed the predetermined time b, the process proceeds to step 8 to set the opening degree α (ba) of the first damper 9 and the second opening degree α (ba). Openness of damper 10 β
Set to (ba) and adjust the opening / closing angle of each damper.

That is, at that time, the first damper 9 is in a state in which the fluid discharge hole 7 is completely closed, and the second damper 10 is in a state where the fluid suction hole 8 is completely closed. It will be closed. Next, in step 9, the drive of the sub-fan 11 is stopped, and in step 10, the normal air conditioning operation mode is executed.

In step 11, it is determined whether or not the drive switch of the vehicle air conditioner is OFF. If it is ON, the process returns to step 10, and if it is OFF, the process is END.

[0038]

Since the vehicle air conditioner according to the present invention has the above-mentioned structure, it is possible to prevent a bad odor or a strange odor from being blown out into the vehicle compartment when the vehicle air conditioner is started. A vehicle air conditioner that can be prevented is provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a specific example of a vehicle air conditioner according to the present invention.

FIG. 2 is a diagram illustrating a control state of first and second dampers.

FIG. 3 is a diagram showing a difference in effect between a vehicle air conditioner according to the present invention and a conventional vehicle air conditioner.

FIG. 4 is a flowchart illustrating an operating procedure of a vehicle air conditioner according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Air-conditioning system for vehicles 2 ... Ventilation flow path 3 ... Blower 4 ... Evaporator 5 ... Heater core 6 ... Fluid discharge hole 7 ... Fluid discharge hole 8 ... Fluid suction hole 9 ... First damper 10 ... Second damper 11 ... Outside air Inhalation means for inhalation, sub fan 12 ... Central control means 13 ... First damper control means 14 ... Second damper control means 61 ... Foot blowout hole 62 ... Vent blowout hole 63 ... Defroster blowout hole

Claims (6)

[Claims] 1. A vehicle air conditioner provided with a blower for sending air into the ventilation passage, a heat exchanger for exchanging the blown air with heat, and a fluid outlet for blowing the heat-exchanged air into the passenger compartment. In the device, between the blower and the fluid outlet, a fluid discharge hole for discharging the blown air to the outside of the ventilation passage and a fluid suction hole for sucking the air outside the ventilation passage into the passage. A vehicle air conditioner characterized by being provided with. 2. The vehicle air conditioner according to claim 1, wherein dampers are arranged in the fluid discharge hole and the fluid suction hole, respectively. 3. The first damper arranged in the fluid discharge hole is configured to selectively close either the fluid discharge hole or the ventilation passage. The vehicle air conditioner according to claim 2. 4. The vehicle air conditioner according to claim 2, wherein the second damper arranged in the fluid suction hole is configured to selectively close the fluid suction hole. apparatus. 5. The vehicle air conditioner includes control means, and the first and second dampers are controlled by the control means.
The vehicle air conditioner according to claim 3 or 4, wherein the respective opening degrees are controlled in a mutually related manner. 6. The vehicle air conditioner according to claim 4, wherein the fluid suction hole is provided with suction means for sucking outside air.