JP4908243B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner in which a passage on the downstream side from an air mix door in an air conditioning case is defined by a partition into a first passage and a second passage, and the first passage air distribution amount and the second passage air distribution amount are controlled. Relates to the device.

  Conventionally, as a vehicle air conditioner for controlling a left side passage air flow rate and a right side passage air flow rate by defining a left side passage and a right side passage by a partition wall from a cooling heat exchanger in an air conditioning case as a blower, It is known that a single rotary door for controlling the air distribution ratio is provided at an upstream position of the evaporator, and the left and right passage air distribution amounts are controlled by setting the door angle position (for example, , See Patent Document 1).

In addition, a vehicle air conditioner that controls a left passage air flow rate and a right passage air flow amount by dividing a downstream passage from a cooling heat exchanger in an air conditioning case into a left passage and a right passage by a partition wall, A cool air door and a warm air door that determine the mixing ratio of the wind are used as air distribution doors, and the passage area of the left passage and the right passage is controlled while keeping the mixing ratio of the cold and warm air constant ( For example, see Patent Document 2).
Japanese Patent No. 2682627 JP 2004-306936 A

  However, in the conventional vehicle air conditioner described in the above-mentioned Patent Document 1, since the inlet opening area of the evaporator is changed by one door, if one inlet opening area is widened, the other inlet The opening area is narrowed, and the influence of the control to reduce one air distribution amount on the other is increased as the decrease in one air distribution amount greatly increases the other air distribution amount. When looking at the wind speed distribution, the side where the inlet opening area is widened changes at high speed, and the side where the inlet opening area is narrowed changes at low speed. As described above, when the air flow control is performed, both the left passage wind speed distribution and the right passage wind speed distribution change due to the influence. (A) Causes of noise increase such as wind noise generated on the higher wind speed side. (B) On the side where the wind speed is low, the evaporator outlet temperature decreases and causes partial freezing, etc. (c) Of the two passages, the air distribution amount in one passage remains unchanged and the other passage There was a problem in that independent control of the air distribution amount that increases or decreases only the air distribution amount is not possible.

  Further, in the conventional vehicle air conditioner described in the above-mentioned Patent Document 2, during the air volume control by the passage area control of the left passage and the right passage, the mixing ratio of the cold and warm air is kept constant, that is, Although the door opening ratio of the cold air door and the hot air door is kept constant, even if the door opening ratio is kept constant, the degree of ease of mixing the cold air and the hot air due to the change in the air distribution amount. Air mix is different. Thus, since the cold air door and the hot air door are used as the air distribution door, control interference occurs between the air distribution amount control and the temperature adjustment control. In other words, there is a problem that the air mix property becomes unstable due to the influence of the air volume change, and the temperature control property is impaired.

  The present invention has been made paying attention to the above-mentioned problem, and when controlling the air distribution amount, the air distribution amount of the two passages is increased or decreased without impairing the temperature controllability while preventing the generation of noise and the occurrence of partial freezing. An object of the present invention is to provide a vehicle air conditioner that can be independently controlled in response to a request.

In order to achieve the above object, in the present invention, a cooling heat exchanger and a heating heat exchanger are arranged in an air conditioning case,
A hot air passage through which the passing air of the cooling heat exchanger passes through the heating heat exchanger;
A cold air bypass passage for bypassing the heating heat exchanger;
A mix chamber in which the hot air passage and the cold air bypass passage merge;
An air mix door that changes the air distribution amount between the hot air passage and the cold air bypass passage, and controls a mixing ratio of the cold air and the hot air;
Have
A passage downstream from the air mix door is divided into a first passage and a second passage by a partition, and a first passage air distribution amount passing through the first passage and a second passage air distribution amount passing through the second passage. In the vehicle air conditioner for controlling the
The first passage is a right passage that blows temperature-controlled air toward the right passenger compartment of the vehicle through a mode door,
The second passage is a left-side passage that blows temperature-controlled air toward the left-side cabin of the vehicle through a mode door,
A first air distribution door that controls the opening area of the right passage so as to span the cold air bypass passage and the hot air passage at a position downstream of the heat exchanger for cooling and immediately before the air mix door; Set a second air distribution door for controlling the opening area of the left passage ,
The first air distribution door includes a cold air bypass passage and a hot air passage at a position where a partition partitioning the right passage and the left passage intersects with an air mix door, and at a position where an air conditioning case and an air mix door intersect, respectively. A winding-type right film door that is provided with a winding shaft so as to span and closes a part of both the cold air opening area and the hot air opening area of the right passage by winding,
The second air distribution door includes a cold air bypass passage and a hot air passage at a position where a partition partitioning the right passage and the left passage intersects with an air mix door, and at a position where an air conditioning case and an air mix door intersect, respectively. It is a winding-type left film door that is provided with a winding shaft so as to extend and closes part of both the cold air opening area and the hot air opening area of the left passage by winding .

Therefore, in the vehicle air conditioner of the present invention, the air that has passed through the cooling heat exchanger and the air mixing door and is divided into the first passage and the second passage is disposed downstream of the cooling heat exchanger. By providing ventilation resistance by the provided first air distribution door or second air distribution door, air distribution amount control is performed to make the first passage air distribution amount different from the second passage air distribution amount. At this time, since the two air distribution doors are arranged across the cold air bypass passage and the hot air passage, both the cold air bypass passage, the cold air opening area of the hot air passage, and the hot air opening area are reduced. Increases the ventilation resistance of the passage. For this reason, the amount of air distribution on one side decreases without greatly changing the air distribution ratio of the warm air and the cold air by the air mix door.
Therefore, at the time of air distribution control, the outlet air speed distribution of the cooling heat exchanger only changes depending on the difference in the air distribution amount, so the outlet air speed distribution and outlet temperature distribution of the cooling heat exchanger are stable. The characteristics can be maintained, and the generation of noise due to the change in the outlet wind speed distribution and the occurrence of partial freezing due to the change in the outlet temperature distribution can be prevented.
The first air distribution door and the second air distribution door are dedicated doors used only for air distribution amount control, and the air distribution amount control is performed independently of the temperature adjustment control by the air mix door. For this reason, there is no control interference between the air distribution control and the temperature adjustment control, the influence on the air mix property due to the air flow change is reduced, and the air distribution control can be performed without impairing the temperature control.
In addition, for example, combined use of door opening control of the air distribution door that changes the ventilation resistance of one passage and total air flow increase / decrease control that compensates for the increase in air distribution amount or the shortage of air distribution generated by the door opening control. By performing the air distribution amount control to be performed, the air distribution amount to one passage is maintained as it is, and only the air distribution amount to the other passage can be changed in response to an increase request or a decrease request.
As a result, during the air distribution control, the air distribution in the two passages can be independently controlled in response to the increase / decrease request without impairing the temperature controllability while preventing the generation of noise and partial freezing.

  Hereinafter, the best mode for realizing the vehicle air conditioner of the present invention will be described based on Examples 1 to 3 shown in the drawings.

First, the configuration will be described.
FIG. 1 is a longitudinal sectional view showing an air conditioning unit A / U1 (an example of a vehicle air conditioner) of left / right / front / rear independent temperature control type according to the first embodiment, and FIG. 2 is a diagram showing an air conditioning unit A / U1 according to the first embodiment. It is a cross-sectional plan view by the 1A-A line. FIG. 3 is a view in the direction of arrow B in FIG. 2 showing the air distribution door and the mix door in the air conditioning unit A / U1 of the first embodiment.

  As shown in FIGS. 1 and 2, the air conditioning unit A / U1 in the first embodiment includes an air conditioning case 1, an evaporator 2 (cooling heat exchanger), a heater core 3 (heating heat exchanger), and warm air. Passage 23, cool air bypass passage 24, mix chamber 25, differential door 4 (mode door), vent door 5 (mode door), foot door 6 (mode door), rear warm air door 7, and rear cool air Door 8, rear mode door 9, front mix door 10 (air mix door), front air distribution door 11 (air distribution door), rear cool air passage 12, rear foot connection port 13, and rear vent connection port 14. A blower connection port 15, a rear foot door 16, an intake door 17, a blower motor 18, a blower unit 19 (blower), a center partition plate 20 (a partition wall), A passage 21 (first passage) and a left passage 22 (second passage) are provided.

  In the air conditioning unit A / U1 in the first embodiment, an evaporator 2, a front mix door 10, and a heater core 3 are arranged in the air conditioning case 1 in order from the upstream blower unit 19 side toward the downstream outlet side.

  The evaporator 2 is a heat exchanger that sucks the inside air or the outside air selected by the intake door 17 by the blower unit 19 and cools the air blown to the inlet side through the blower connection port 15.

  The front mix door 10 is disposed at a downstream position of the evaporator 2, and controls the mixing ratio of the cool air that has passed through the evaporator 2 and the warm air that has passed through the heater core 3 by the door opening. As the front mix door 10, a slidable door is used that is slidable in a stroke range from a full hot position that closes the cold air bypass passage 24 to a full cool position that closes the upstream side of the heater core 3. Here, the hot air passage 23 is a passage through which the passing air (cold air) of the evaporator 2 passes through the heater core 3 to become hot air, and the cold air bypass passage 24 is a cold air passage that bypasses the heater core 3. The mix chamber 25 is formed at a position where the hot air from the hot air passage 23 and the cold air from the cold air bypass passage 24 merge.

  The heater core 3 is a heat exchanger that is arranged at a downstream position of the evaporator 2 and the front mix door 10 and circulates engine cooling water or the like as a heating medium to warm the passing wind.

  As shown in FIG. 2, the air conditioning unit A / U1 in the first embodiment defines a passage on the downstream side from the evaporator 2 into a right passage 21 and a left passage 22 by a center partition plate 20, and passes through the right passage 21. The right passage air distribution amount and the left passage air distribution amount passing through the left passage 22 are controlled independently.

  The right side passage 21 is a passage that blows temperature-controlled air toward the right front seat side passenger compartment of the vehicle via the right vent door 5R and the right foot door 6R. The left-side passage 22 is a passage that blows temperature-controlled air toward the left front seat side vehicle compartment via the left vent door 5L and the left foot door 6L.

  In the first embodiment, in order to control the air distribution amount, the right air distribution door 11R (first air distribution door) that controls the opening area of the right passage 21 is positioned downstream of the evaporator 2 and upstream of the front mix door 10. ) And the left air distribution door 11L (second air distribution door) for controlling the opening area of the left passage 22 is set.

  As shown in FIG. 2, the right air distribution door 11R and the left air distribution door 11L are arranged immediately before the right front mix door 10R and the left front mix door 10L, and are center partitions that partition the right passage 21 and the left passage 22. A rotating shaft is provided at the position where the plate 20 and the front mix door 10 intersect each other so as to extend over the cold air bypass passage 24 and the hot air passage 23, respectively, and the cold air opening area and the hot air opening area of the right passage 21 are fully closed. A part of both opening areas and a part of the opening area of both the cold air opening area and the hot air opening area of the left passage 22 are configured as a rotary opening / closing door.

  The front mix door 10 controls the right front mix door 10R (first air mix door) that controls the mixing ratio of cold air and hot air in the right passage 21, and the mixing ratio of cold air and hot air in the left passage 22. Left front mix door 10L (second air mix door). And the ventilation temperature which passes the right channel | path 21, and the ventilation temperature which passes the left channel | path 22 are controlled independently of air distribution control.

Next, the configuration of the air conditioning control system will be described.
FIG. 4 is an air conditioning control block diagram in the air conditioning unit A / U1 of the first embodiment.
As an information source for providing input information to the air conditioning control unit 30 of the air conditioning control system, the outside air temperature sensor 31, the right indoor temperature sensor 32, the left indoor temperature sensor 33, the suction temperature sensor 34, the solar radiation sensor 35, and the control A panel 36.

  The control panel 36 includes operation means such as a right temperature setting 36a, a left temperature setting 36b, an inside / outside air switching 36c, a blowout mode switching 36d, an air volume switching 36e, a right air volume adjustment 36f, and a left air volume adjustment 36g. In addition, an air conditioner switch 36h, an auto switch 36i, and an off switch 36j are provided.

  As an output system controlled by the air conditioner control unit 30, a compressor clutch 37, a blower motor 18, an inside / outside air door actuator 38, a right vent door actuator 39, a left vent door actuator 40, a right foot door actuator 41, and a left A foot door actuator 42, a right mix door actuator 43, a left mix door actuator 44, a right wind door actuator 45, a left wind door actuator 46, and a rear mix door actuator 47 are provided.

In this air conditioning control system, the blowing temperature passing through the right passage 21 and the blowing temperature passing through the left passage 22 by control commands to the right mix door actuator 43 and the left mix door actuator 44 based on the right temperature setting, the left temperature setting, etc. The temperature adjustment control for independently controlling is performed (temperature adjustment control means).
Also, the inside / outside air switching control is performed by a control command to the inside / outside air door actuator 38 based on the inside / outside air switching operation or the like.
In addition, mode switching control is performed according to control commands to the right vent door actuator 39, the left vent door actuator 40, the right foot door actuator 41, the left foot door actuator 42, and the like based on the blow mode setting operation.
Further, one of the right passage air distribution amount and the left passage air distribution amount is controlled by control commands to the blower motor 18, the right air distribution door actuator 45, and the left air distribution door actuator 46 based on the air flow switching operation, the right air flow adjustment, the left air flow adjustment, and the like. In response to the increase / decrease request, air distribution amount control is performed to control the air distribution amount independently on the left and right sides (air distribution amount control means).

  FIG. 5 is a flowchart showing a flow of temperature adjustment and air flow control processing executed by the air conditioner control unit 30 according to the first embodiment. Each step will be described below.

  Step S1 is a step of reading a signal from a sensor or the like that provides input information necessary for each control.

  Step S2 is a step of calculating a target blowing temperature following the signal reading in step S1. This target blowing temperature is set so as to converge with good response to the temperature set by the occupant in consideration of various temperature environmental conditions.

  Step S3 is a step of calculating the blower control value based on the air volume switching operation following the calculation of the target blowing temperature in step S2. For example, at the time of uniform air distribution in which the right passage air distribution amount and the left passage air distribution amount are the same, the air amount is increased or decreased evenly by the air amount switching operation.

  Step S4 is a step of calculating the door opening control value of the temperature control door by the right mix door 10R and the left mix door 10L based on the right temperature setting and the left temperature setting, respectively, following the blower control value calculation in step S3. is there.

  In step S5, following the calculation of the temperature control door control value in step S4, whether the air distribution request for the right passage 21 and the air distribution request for the left passage 22 match based on the right air flow adjustment operation and the left air flow adjustment operation. This is a step of determining whether or not. When the air distribution amount request for the right passage 21 and the air distribution amount request for the left passage 22 match, the process proceeds to step S6, and when the air distribution request for one of the right passage 21 and the left passage 22 decreases. The process proceeds to step S8, and when the request for the air distribution amount of one of the right passage 21 and the left passage 22 is increased, the process proceeds to step S11.

  In step S6, following the determination that the right passage air distribution amount and the left passage air distribution amount are the same at step S5, the opening degree of the right air distribution door 11R and the left air distribution door 11L is determined. In this step, both target values are set to fully open (= normal air distribution door opening).

  Step S7 is a step of calculating the door actuator control values of the right air distribution door actuator 45 and the left air distribution door actuator 46 following the setting of the normal air distribution door opening in step S6. That is, when the air distribution doors 11R and 11L are fully open, a control value for maintaining the fully open state is calculated. When one of the air distribution doors 11R and 11L is closed, the door opening degree at that time is fully opened. A control value for the door opening is calculated.

In step S8, following the determination that one of the right passage air distribution amount and the left passage air distribution amount is to be reduced in step S5, the opening of the air distribution door on the side where the air distribution amount is to be reduced is determined. This is a step of calculating the degree target value based on the door opening degree and the air distribution characteristic shown in FIG.
That is, in step S8, the door opening degree control for closing the air distribution door on the side where the air distribution amount is reduced according to the difference in the air distribution amount is performed. For example, when the reduction side air distribution ratio is lowered by 20% (100% → 80%), the door opening target value is set to about 85%, and when the reduction side air distribution ratio is lowered by 40% (100% → 60). %), The door opening target value is about 50%, and when the reduction side air distribution ratio is lowered by 50% (100% → 50%), the door opening target value is 0% (fully closed). .

  Step S9 is a door for changing the door opening from the door opening 100% to the door opening target, following the calculation of the target opening of the air distribution door on the side where the air distribution is reduced in step S8. This is a step of calculating an actuator control value.

  In step S10, following the calculation of the door actuator control value in step S9, the air distribution amount in the air distribution amount maintaining side passage increases with the increase in ventilation resistance in the air distribution amount decreasing side passage by the door opening degree control. This is a step of calculating a blower voltage control value for compensating for the minute by reducing the total air volume. That is, the increase in the air distribution amount in the air distribution amount maintaining side passage by the door opening control is corrected by the total air amount decrease control, and the pre-control air distribution amount (50%) is maintained.

  In step S11, following the determination in step S5 that there is an increase request to increase one of the right passage air distribution amount and the left passage air distribution amount, the door opening of the air distribution door on the side maintaining the air distribution amount is opened. This is a step of calculating the degree target value based on the door opening degree and the air distribution characteristic shown in FIG. That is, in step S11, the door opening degree control for closing the air distribution door on the side maintaining the air distribution amount according to the difference in the air distribution amount is performed.

  Step S12 is a door for changing the door opening from the door opening 100% to the door opening target, following the calculation of the target opening of the air distribution door on the side of maintaining the air distribution in step S11. This is a step of calculating an actuator control value.

  In step S13, following the calculation of the door actuator control value in step S12, the air distribution amount in the air distribution amount maintaining side passage decreases with the increase in the ventilation resistance in the air distribution amount maintaining side passage by the door opening degree control. This is a step of calculating a blower voltage control value for compensating for the minute amount by increasing the total air volume. That is, the air distribution amount decrease in the air distribution amount maintaining side passage by the door opening control is corrected by the total air amount increase control, and the pre-control air distribution amount (50%) is maintained.

  Step S14 is a step of outputting the calculated control values (blower control value, temperature control door control value, door actuator control value, blower voltage control value) following the control value calculation in steps S6 to S13.

Next, the operation will be described.
In the air conditioning unit A / U1 of the first embodiment, the right air distribution door 11R that controls the opening area of the right passage 21 at the downstream position of the evaporator 2 and upstream of the front mix door 10, and the left passage A left air distribution door 11L that controls the opening area of 22 is set.

  Then, by controlling the opening degree of the right side air distribution door 11R or the left side air distribution door 11L on the downstream side of the evaporator 2, a ventilation resistance is given to one of the winds that pass through the evaporator 2 and the front mix door 10 and are divided into left and right. The air distribution amount in the right passage 21 and the air distribution amount in the left passage 22 are controlled. For this reason, at the time of air distribution control, only the change according to the difference in the air distribution is seen in the outlet wind speed distribution of the evaporator 2. Therefore, unlike the conventional example in which the opening area of the inlet of the evaporator is changed by one rotary door for controlling the air distribution ratio, the outlet wind speed distribution and outlet temperature distribution of the evaporator 2 maintain stable characteristics, and the noise caused by the change in the outlet wind speed distribution. And partial freezing due to changes in outlet temperature distribution can be prevented. Further, in the present embodiment, the evaporator 2 and the center partition plate 20 are separated from each other, and the passages 21 and 22 communicate with each other in the wake of the evaporator, so that the evaporator outlet wind speed distribution is further stabilized.

  Further, the right air distribution door 11R and the left air distribution door 11L are dedicated doors used only for air distribution control, and the air distribution control is performed independently of the temperature adjustment control by the left and right front mix doors 10R and 10L. Unlike the case where the temperature control door is used as the air distribution door, there is no control interference between the air distribution control and the temperature adjustment control, and the influence on the air mix property due to the air flow change is reduced, and the temperature control performance is improved. It is possible to control the air distribution without damaging it.

Further, when one of the right side door 11R and the left side door 11L is closed, the ventilation resistance on the closed side is increased and the amount of wind is reduced. At this time, since both the air distribution doors 11R and 11L are arranged across the cold air bypass passage 24 and the hot air passage 23, both the cold air opening area and the hot air opening area of the cold air bypass passage 24 and the hot air passage 23 are provided. As a result, the ventilation resistance of both passages 24 and 23 increases. For this reason, one air distribution amount decreases, without changing the air distribution ratio of the warm air and the cold air by the left and right front mix doors 10R and 10L.
When one of the air distribution doors 11R and 11L is closed, the ventilation resistance on the side where the air distribution door that maintains the opening degree of the other door is relatively decreased, thereby opening the door. The passage air distribution on the degree maintenance side slightly increases. The total air volume has a characteristic that the total air volume after the air distribution control is lower than the total air volume before the air distribution control.

On the other hand, in the air distribution control in the first embodiment, the door opening control of the air distribution doors 11R and 11L that changes the ventilation resistance of one of the right passage 21 and the left passage 22 and the door opening control. The total air volume increase / decrease control that compensates for the increased air distribution volume and the insufficient air distribution volume is used in combination. For this reason, the air distribution amount to one passage can be maintained as it is, and only the air distribution amount to the other passage can be changed in response to an increase request or a decrease request.
Hereinafter, the air volume control action to the left passage 21 and the right passage 22 will be described separately for [when the left and right uniform air distribution amount is requested], [when one air distribution amount is requested to decrease], and [when one air distribution amount is requested to be increased]. .

[At the time of requesting the right and left uniform air distribution]
At the time of requesting the right and left uniform air distribution amount, in the flowchart of FIG.

  That is, when it is determined in step S5 that the right side air distribution amount and the left side passage air distribution amount are the same, the right air distribution door 11R and the left air distribution door 11L doors are determined in step S6. Both the opening target values are set to fully open, the process proceeds from step S7 to step S13, and control is performed to fully open the right air distribution door 11R and the left air distribution door 11L.

In this way, when the right and left uniform air distribution is required, the right air distribution door 11R and the left air distribution door 11L are fully opened, so that the ventilation resistance of the right passage 21 and the left passage 22 is not increased, and the airflow loss is suppressed. An effective uniform air distribution can be passed through the right passage 21 and the left passage 22.
In addition, when there is a request for increase / decrease of the air distribution amount in the right / left uniform air distribution, it is possible to respond to the air distribution amount increase / decrease request in the right / left uniform air distribution by calculating the blower control value according to the air distribution amount increase / decrease request .

[When requesting a reduction in air volume of one side]
When one air distribution amount reduction request is made by the air volume adjustment operation, the flow proceeds to step S1, step S2, step S3, step S4, step S5, step S8, step S9, step S10, and step S14 in the flowchart of FIG. .

  That is, in step S5, if it is determined that it is the time of a decrease request to reduce one of the right passage air distribution amount and the left passage air distribution amount, in step S8, the air distribution door on the side that reduces the air distribution amount is determined. A door opening target value is calculated. And it progresses from step S8 to step S9-> step S10-> step S14, the control which closes one door opening among the right side wind door 11R and the left side wind door 11L, and the total ventilation volume from the blower unit 19 are carried out. Control to decrease is also performed.

  Incidentally, in the case of a pattern in which the air volume in the right passage 21 is left unchanged and the air volume in the left passage 22 is reduced by 10%, as shown in FIG. 50%: 50%), the door opening degree of the left air distribution door 11L is closed. By this control, the difference between the air distribution ratio (> 50%) of the right passage 21 and the air distribution ratio (<50%) of the left passage 22 is about 10%, and the total air volume is slightly lower than before the control (100%). To drop. Then, by reducing the voltage to the blower motor 18, both the air volume in the right passage 21 and the air volume in the left passage 22 are reduced. As a result, the air volume in the right passage 21 is maintained at the air volume before the control (50%), and the air volume in the left passage 22 is reduced by about 10% from the left passage air volume (50%) before the control, to about 40%. Become.

  In this way, when one air distribution amount reduction request is made, the door opening degree of the air distribution door on the air distribution amount reduction request side is closed according to the difference in the air distribution amount, and the airflow resistance in the air distribution amount reduction side passage The total air volume reduction control is performed to compensate for the increase in the air distribution volume in the air distribution maintenance side passage accompanying the increase in the air volume by reducing the total air volume. For this reason, it is possible to meet a reduction request for only one air distribution amount by using both the door opening degree control that gives a difference in the air distribution amount and the total air amount decrease control while maintaining the air distribution amount difference.

[When requesting an increase in air volume on one side]
At the time of one air distribution amount increase request by the air volume adjustment operation, the flow proceeds to step S1, step S2, step S3, step S4, step S5, step S11, step S12, step S13, and step S14 in the flowchart of FIG. .

  That is, in step S5, when it is determined that it is an increase request to increase one of the right passage air distribution amount and the left passage air distribution amount, in step S11, the air distribution door on the side maintaining the air distribution amount is determined. A door opening target value is calculated. And it progresses from step S11 to step S12-> step S13-> step S14, and the control which closes one door opening among the right side wind door 11R and the left side wind door 11L, and the total ventilation volume from the blower unit 19 are carried out. Control to increase is performed together.

  Incidentally, in the case of a pattern in which the air flow rate in the right passage 21 is kept unchanged and the air flow rate in the right passage 21 is increased by 10%, as shown in FIG. 50%: 50%), the door opening degree of the left air distribution door 11L is closed. By this control, the difference between the air distribution ratio (> 50%) of the right passage 21 and the air distribution ratio (<50%) of the left passage 22 is about 10%, and the total air volume is slightly lower than before the control (100%). To drop. Then, by increasing the voltage to the blower motor 18, both the air volume in the right passage 21 and the air volume in the left passage 22 are increased. As a result, the air volume in the left passage 22 is maintained at the air volume before the control (50%), and the air volume in the right passage 21 is increased by about 10% from the right passage air volume (50%) before the control to about 60%. Become.

  In this way, when one of the air distribution amount increases is requested, the door opening degree of the air distribution door on the air distribution amount maintenance request side is closed according to the difference in the air distribution amount, and the airflow resistance in the air distribution amount maintenance side passage The total air volume increase control is made to compensate for the shortage of air distribution volume in the passage with increased air distribution volume due to the increase in the total air volume. For this reason, the combined use of the door opening degree control that gives a difference in the air distribution amount and the total air amount increase control while maintaining the air distribution amount difference makes it possible to meet an increase request for only one air distribution amount.

Next, the effect will be described.
In the air conditioning unit A / U1 of the first embodiment, the effects listed below can be obtained.

  (1) The evaporator 2 and the heater core 3 are arranged in the air conditioning case 1, the hot air passage 23 through which the air passing through the evaporator 2 passes through the heater core 3, the cold air bypass passage 24 that bypasses the heater core 3, A front mix door that controls the mixing ratio of the cold air and the hot air by changing the amount of air distribution between the hot air passage 23 and the cold air bypass passage 24, and the amount of air distribution between the hot air passage 23 and the cold air bypass passage 24. 10, a passage on the downstream side from the air mix door is defined by a center partition plate 20 into a first passage and a second passage, and the first passage air distribution amount passing through the first passage and the first passage In the air conditioning unit A / U1 for controlling the second passage air distribution amount passing through the two passages, the downstream position of the evaporator 2 and the upstream position of the front mix door 10 Alternatively, the first air distribution door for controlling the opening area of the first passage and the second air distribution door for controlling the opening area of the second passage so as to extend over the cold air bypass passage 24 and the hot air passage 23 in the downstream position. Therefore, when controlling the air flow rate, the air flow rate in the two passages can be controlled independently in response to the increase / decrease request without impairing the temperature controllability while preventing the generation of noise and partial freezing. .

  (2) A door that controls the opening degree of one of the first air distribution door and the second air distribution door in response to an increase / decrease request of the first passage air distribution amount and the second passage air distribution amount during the air distribution amount control. Since the air distribution amount control means for performing the opening degree control and the total air amount control by the blower unit 19 is provided, the air distribution amount responding to the increase request or the decrease request of only the air distribution amount of the other passage without changing the air distribution amount of one passage. Control can be performed.

  (3) The air distribution control means keeps both the first air distribution door and the second air distribution door fully open when requesting an equal air distribution in which the first passage air distribution amount and the second passage air distribution amount are the same. Door opening control and the total air volume increase / decrease control by increasing / decreasing the total air volume in response to the increase / decrease request, so there is no increase in ventilation resistance in the first passage and the second passage, and effective even distribution with reduced air flow loss The air volume can be passed through the first passage and the second passage, and an increase / decrease in the air distribution amount with uniform air distribution can be met.

  (4) When the air distribution amount control means requests to reduce the air distribution amount of one of the first passage air distribution amount and the second passage air distribution amount, the air opening amount of the air distribution door on the air distribution amount reduction request side is calculated. The door opening control closes according to the difference between the airflow and the airflow reduction in the airflow reduction side passage increases the airflow distribution in the airflow maintenance side passage due to the increase in airflow resistance. Therefore, it is possible to meet a reduction request for only one air distribution amount by using both the door opening degree control that gives a difference in the air distribution amount and the total air amount decrease control while maintaining the air distribution difference.

  (5) When the air distribution amount control means requests to increase the air distribution amount of one of the first passage air distribution amount and the second passage air distribution amount, the air opening amount of the air distribution door on the air distribution amount maintenance request side is determined. Door opening control that closes according to the difference between the two, and the total air volume increase control that compensates for the shortage of air distribution in the air distribution increase side passage due to the increase in ventilation resistance in the air distribution maintenance side passage by increasing the total air volume For this reason, it is possible to meet an increase request for only one air distribution amount by using both the door opening degree control that gives a difference in the air distribution amount and the total air amount increase control while maintaining the air distribution difference.

  (6) The front mix door 10 includes a right front mix door 10R that controls the mixing ratio of cold air and hot air in the first passage, and a left that controls the mixing ratio of cold air and hot air in the second passage. There is a front mix door 10L, and temperature adjustment control means is provided for controlling the air temperature passing through the first passage and the air temperature passing through the second passage independently of the air flow control by the air flow control means. Therefore, the air distribution amount control of the first passage and the second passage can be performed in response to the air distribution amount increase / decrease request without affecting the independent temperature adjustment control of the first passage and the second passage.

  (7) The first passage is a right passage 21 that blows temperature-controlled air toward the right vehicle compartment of the vehicle through the mode door, and the second passage is in the left vehicle compartment of the vehicle through the mode door. Since the left side passage 22 blows out the temperature-controlled wind toward the left, the air distribution amount in the left and right passenger compartments can be optimally controlled according to an increase / decrease request from one of the left and right passengers.

  (8) The first air distribution door and the second air distribution door are disposed immediately before the front mix door 10, and a center partition plate 20 and the front mix door 10 that partition the right passage 21 and the left passage 22 are provided. Rotating shafts are provided at the intersecting positions so as to extend across the cold air bypass passage 24 and the hot air passage 23, respectively. Since it is the rotation opening / closing type right air distribution door 11R and the left air distribution door 11L that close a part of both the cold air opening area and the hot air opening area of the passage 22, it is a compact that closes a part of the opening area. The ventilation resistance of the right side passage 21 and the left side passage 22 can be controlled independently by controlling the opening of the door while being a pivoting open / close type door.

  Example 2 is an example in which a right film door and a left film door are used as the air distribution door instead of the rotation opening / closing type door of Example 1.

First, the configuration will be described.
FIG. 8 is a cross-sectional plan view showing a left / right / front / rear independent temperature control type air conditioning unit A / U2 (an example of a vehicle air conditioner) according to a second embodiment. 9 is a view in the direction of arrows CC in FIG. 8 showing the right film door and the left film door in the air conditioning unit A / U2 of Example 2, (a) shows normal air distribution, and (b) shows Indicates when the left / right wind distribution is changed.

  As shown in FIG. 8, the air conditioning unit A / U2 in the second embodiment includes an air conditioning case 1, an evaporator 2 (cooling heat exchanger), a heater core 3 (heating heat exchanger), a right foot door 6R, Left foot door 6L, right front mix door 10R (air mix door), left front mix door 10L (air mix door), center partition plate 20 (partition wall), right passage 21 (first passage), and left passage 22 (second passage), a right film door 51R, and a left film door 51L.

  The right film door 51R is disposed immediately before the right front mix door 10R, a position where the center partition plate 20 that partitions the right passage 21 and the left passage 22 intersects the right front mix door 10R, and the air conditioning case 1 And the right front mix door 10R intersect with each other by providing a winding shaft extending over the cold air bypass passage 24 and the hot air passage 23, respectively, and by winding both the cold air opening area and the hot air opening area of the right passage 21 This is a roll-up film door that closes a part of the opening area.

  The left film door 51L is disposed immediately before the left front mix door 10L, a position where the center partition plate 20 separating the right passage 21 and the left passage 22 intersects the left front mix door 10L, and the air conditioning case 1 And the left front mix door 10L intersect with each other by providing a winding shaft so as to extend over the cold air bypass passage 24 and the hot air passage 23, respectively, and both the cold air opening area and the hot air opening area of the left passage 22 by winding. This is a roll-up film door that closes a part of the opening area.

As shown in FIG. 9, each of the film doors 51R and 51L is formed with a rectangular hole 51a and a triangular hole 51b for narrowing the opening area, respectively, and the triangular hole 51b is wound up. The passage opening area is maximized (FIG. 9A), and the passage opening area is minimized while the rectangular hole 51a is wound up (left film door 51L in FIG. 9B).
Here, the triangular holes 51 b of the film doors 51 </ b> R and 51 </ b> L are disposed across the cold air bypass passage 24 and the hot air passage 23. Thus, both the cold air opening area and the hot air opening area of the cold air bypass passage 24 and the hot air passage 23 are reduced, and the ventilation resistance of the passage restricted by the winding is increased. Since other configurations are the same as those in the first embodiment, the same reference numerals are given to the corresponding configurations, and descriptions thereof are omitted.

  Next, the left and right wind distribution changing action in the air conditioning unit A / U2 of the second embodiment will be described. As shown in FIG. 9A, in the normal wind distribution that maximizes the passage opening area by the film doors 51R and 51L. The triangular hole 51b is wound up, and the rectangular hole 51a is placed between the winding shaft widths WR and WL.

  Then, when changing the left and right wind distribution to maximize the passage opening area by the right film door 51R and minimize the passage opening area by the left film door 51L, as shown in FIG. 9B, the left film door 51L has a rectangular shape. The hole 51a is wound up, and the triangular hole 51b is placed between the winding shaft widths WR and WL. Since other operations are the same as those in the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the air conditioning unit A / U2 of the second embodiment, in addition to the effects (1) to (7) of the first embodiment, the following effects can be obtained.

  (9) The first air distribution door and the second air distribution door are disposed immediately before the left and right front mix doors 10R and 10L, and the center partition plate 20 that partitions the right passage 21 and the left passage 22 and the left and right front doors. Winding shafts are provided at the position where the mix doors 10R, 10L intersect and the position where the air conditioning case 1 intersects the left and right front mix doors 10R, 10L so as to span the cold air bypass passage 24 and the hot air passage 23, respectively. Winding type that closes a part of both the cold air opening area and the hot air opening area of the right passage 21 and part of the opening area of both the cold air opening area and the hot air opening area of the left passage 22 by winding. Since the right film door 51R and the left film door 51L of the right side door 21L can be installed in a small space compared to the rotation opening and closing type door, The ventilation resistance of the left passage 22 can be controlled independently.

  Example 3 is an example in which a left / right film door is used instead of the rotation opening / closing type door of Example 1 and the right film door and left film door of Example 2 as the air distribution door.

First, the configuration will be described.
FIG. 10 is a cross-sectional plan view showing an air conditioning unit A / U3 (an example of a vehicle air conditioner) of the left / right / front / rear independent temperature control type according to the third embodiment. 11 is a view in the direction of the arrows DD in FIG. 10 showing the left and right film doors in the air conditioning unit A / U3 of the third embodiment. (A) shows normal air distribution and (b) shows left and right air distribution. Indicates the time of change.

  As shown in FIG. 10, the air conditioning unit A / U3 in the third embodiment includes an air conditioning case 1, an evaporator 2 (cooling heat exchanger), a heater core 3 (heating heat exchanger), a right foot door 6R, Left foot door 6L, right front mix door 10R (air mix door), left front mix door 10L (air mix door), center partition plate 20 (partition wall), right passage 21 (first passage), and left passage 22 (second passage) and a left / right film door 61.

  The left / right combined film door 61 is disposed immediately before the front mix doors 10R and 10L, and the cold air bypass passage 24 and the hot air passage are respectively provided at the left and right positions where the air conditioning case 1 and the front mix doors 10R and 10L intersect. 23, a winding shaft is provided, a part of both the cold air opening area and the hot air opening area of the right passage 21 is closed by winding in one direction, and the left passage is wound by winding in the other direction. This is a roll-up type film door that closes a part of the opening area of both the cold air opening area and the hot air opening area.

  As shown in FIG. 11, the left and right film door 61 is provided with a rectangular hole 61a and triangular holes 61b and 61c for reducing the opening area on both sides of the rectangular hole 61a. In the state where the holes 61b and 61c are wound up, the passage opening area (both the cold air opening area and the hot air opening area) is maximized (FIG. 11 (a)), and the rectangular hole 61a is halved in one direction and the other direction. In the state of winding up, the passage opening area (both the cold air opening area and the hot air opening area) is minimized (FIG. 11 (b)). Since other configurations are the same as those in the first embodiment, the same reference numerals are given to the corresponding configurations, and descriptions thereof are omitted.

  Next, the left and right air distribution changing action in the air conditioning unit A / U3 of Example 3 will be described. During normal air distribution that maximizes the passage opening area by the left and right film door 61, as shown in FIG. The triangular holes 61b and 61c on both sides are wound up, and the rectangular hole 61a in the center is placed between the winding shaft width AW.

  At the time of changing the left and right air distribution that maximizes the opening area of the right passage 21 and minimizes the opening area of the left passage 22, as shown in FIG. A half of the hole 61a is wound up, and the triangular hole 61c is disposed at a position corresponding to the left passage 22. Since other operations are the same as those in the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the air conditioning unit A / U3 of the third embodiment, in addition to the effects (1) to (7) of the first embodiment, the following effects can be obtained.

  (10) The first air distribution door and the second air distribution door are arranged immediately before the front mix doors 10R and 10L, and at the left and right positions where the air conditioning case 1 and the front mix doors 10R and 10L intersect. A winding shaft is provided so as to span the cold air bypass passage 24 and the hot air passage 23, respectively, and a part of both the cold air opening area and the hot air opening area of the right passage 21 is closed by winding in one direction, Since it is a roll-up type left / right film door 61 that closes part of the opening area of both the cold air opening area and the hot air opening area of the left passage 22 by winding in the other direction, it can be saved compared to the rotary opening / closing type door. Installation in a space is possible, and the ventilation resistance of the right passage 21 and the left passage 22 can be independently controlled by winding control while reducing the number of parts compared to two film doors.

  As mentioned above, although the vehicle air conditioner of this invention has been demonstrated based on Example 1-3, it is not restricted to these Examples about a concrete structure, Each claim of a claim Design changes and additions are permitted without departing from the spirit of the invention according to the paragraph.

  In Example 1, a rotation opening / closing type door was shown as the air distribution door, in Example 2, a right film door and a left film door were shown as the air distribution door, and in Example 3, a left / right film door was shown as the air distribution door. However, the specific air distribution door structure is not limited to these structures, and other door structures such as a slide door may be used. Moreover, in Examples 1-3, although the air distribution door was provided in the upstream position just before a front mix door, you may provide an air distribution door in the downstream position immediately after a front mix door. In the first to third embodiments, the first passage is a passage to the right front seat and the second passage is a passage to the left front seat. However, the first passage is a passage to the left and right front seats, and the second passage May be used as a passage to the left and right rear seats. In short, the first area for controlling the opening area of the first passage so as to extend over the cold air bypass passage and the hot air passage at the downstream position of the cooling heat exchanger (evaporator) upstream or downstream of the air mix door. The present invention includes any air distribution door and any second air distribution door that controls the opening area of the second passage.

  In the first to third embodiments, as the air distribution amount control means, the example in which the first air distribution door and the second air distribution door are fully opened at the time of the uniform air distribution request is shown. The door and the second air distribution door may have a predetermined initial opening (an opening that slightly closes the opening area). In this case, when one of the air distribution amounts is requested to decrease or increase, the air distribution amount increase / decrease request can be met only by the air distribution door control without performing the blower control for increasing / decreasing the total air amount.

  In the first to third embodiments, the application example to the left / right / front / rear independent temperature control type air conditioning unit is shown. it can.

It is a longitudinal cross-sectional view which shows the air conditioning unit A / U1 (an example of a vehicle air conditioner) of the left-right and front-back independent temperature control type of Example 1. FIG. It is a cross-sectional plan view by the FIG. 1A-A line which shows air-conditioning unit A / U1 of Example 1. FIG. It is a B direction arrow directional view of FIG. 2 which shows the air distribution door and mix door in air-conditioning unit A / U1 of Example 1. FIG. It is an air-conditioning control block diagram in air-conditioning unit A / U1 of Example 1. FIG. It is a flowchart which shows the flow of the control processing of the temperature adjustment performed by the air-conditioner control unit 30 of Example 1, and an air distribution amount. It is an air distribution characteristic figure which shows the relationship between the door opening degree of an air distribution door, and an air distribution ratio in the control processing of the air distribution amount of Example 1. FIG. It is an effect explanatory view which shows the right-and-left air distribution characteristic at the time of the right-and-left air distribution change in air-conditioning unit A / U1 of Example 1, (a) shows an air volume decrease pattern and (b) shows an air volume increase pattern. It is a cross-sectional top view which shows air-conditioning unit A / U2 (an example of a vehicle air conditioner) of the left-right and front-back independent temperature control type of Example 2. FIG. It is a CC direction arrow view of Drawing 8 showing the right film door and the left film door in air-conditioning unit A / U2 of Example 2, (a) shows at the time of normal wind distribution, and (b) is the left and right wind distribution. Indicates the time of change. It is a cross-sectional top view which shows the air-conditioning unit A / U3 (an example of a vehicle air conditioner) of the left-right and front-back independent temperature control type of Example 3. FIG. It is a DD direction arrow directional view of Drawing 10 showing the film door for both right and left in air-conditioning unit A / U3 of Example 3, (a) shows at the time of normal wind distribution, (b) shows at the time of change of right and left wind distribution. Show.

Explanation of symbols

A / U1, A / U2, A / U3 Air conditioning unit 1 Air conditioning case 2 Evaporator (cooling heat exchanger)
3 Heater core (heat exchanger for heating)
4 Differential door (mode door)
5 Bent door (mode door)
6 Foot door (mode door)
7 Rear warm air door 8 Rear cool air door 9 Rear mode door 10 Front mix door (air mix door)
10R right front mix door (first air mix door)
10L left front mix door (second air mix door)
11 Front air distribution door (air distribution door)
11R Right air distribution door (first air distribution door)
11L Left air distribution door (second air distribution door)
12 Rear cool air passage 13 Rear foot connection port 14 Rear vent connection port 15 Blower connection port 16 Rear foot door 17 Intake door 18 Blower motor 19 Blower unit (blower)
20 Center divider (partition wall)
21 Right passage (first passage)
22 Left passage (second passage)
23 Hot air passage 24 Cold air bypass passage 25 Mix chamber 51R Right film door (first air distribution door)
51L Left film door (second air distribution door)
61 Left and right combined film door (first air distribution door, second air distribution door)

Claims (7)

Arranging a heat exchanger for cooling and a heat exchanger for heating in the air conditioning case,
A hot air passage through which the passing air of the cooling heat exchanger passes through the heating heat exchanger;
A cold air bypass passage for bypassing the heating heat exchanger;
A mix chamber in which the hot air passage and the cold air bypass passage merge;
An air mix door that changes the air distribution amount between the hot air passage and the cold air bypass passage, and controls a mixing ratio of the cold air and the hot air;
Have
A passage downstream from the air mix door is divided into a first passage and a second passage by a partition, and a first passage air distribution amount passing through the first passage and a second passage air distribution amount passing through the second passage. In the vehicle air conditioner for controlling the
The first passage is a right passage that blows temperature-controlled air toward the right passenger compartment of the vehicle through a mode door,
The second passage is a left-side passage that blows temperature-controlled air toward the left-side cabin of the vehicle through a mode door,
A first air distribution door that controls the opening area of the right passage so as to span the cold air bypass passage and the hot air passage at a position downstream of the heat exchanger for cooling and immediately before the air mix door; Set a second air distribution door for controlling the opening area of the left passage ,
The first air distribution door includes a cold air bypass passage and a hot air passage at a position where a partition partitioning the right passage and the left passage intersects with an air mix door, and at a position where an air conditioning case and an air mix door intersect, respectively. A winding-type right film door that is provided with a winding shaft so as to span and closes a part of both the cold air opening area and the hot air opening area of the right passage by winding,
The second air distribution door includes a cold air bypass passage and a hot air passage at a position where a partition partitioning the right passage and the left passage intersects with an air mix door, and at a position where an air conditioning case and an air mix door intersect, respectively. A vehicular air characterized in that it is a wind-up type left film door in which a winding shaft is provided so as to extend and a part of both the cold air opening area and the hot air opening area of the left passage is closed by winding. Harmony device. Arranging a heat exchanger for cooling and a heat exchanger for heating in the air conditioning case,
A hot air passage through which the passing air of the cooling heat exchanger passes through the heating heat exchanger;
A cold air bypass passage for bypassing the heating heat exchanger;
A mix chamber in which the hot air passage and the cold air bypass passage merge;
An air mix door that changes the air distribution amount between the hot air passage and the cold air bypass passage, and controls a mixing ratio of the cold air and the hot air;
Have
A passage downstream from the air mix door is divided into a first passage and a second passage by a partition, and a first passage air distribution amount passing through the first passage and a second passage air distribution amount passing through the second passage. In the vehicle air conditioner for controlling the
The first passage is a right passage that blows temperature-controlled air toward the right passenger compartment of the vehicle through a mode door,
The second passage is a left-side passage that blows temperature-controlled air toward the left-side cabin of the vehicle through a mode door,
A first air distribution door that controls the opening area of the right passage so as to span the cold air bypass passage and the hot air passage at a position downstream of the heat exchanger for cooling and immediately before the air mix door; Set a second air distribution door for controlling the opening area of the left passage,
The first air distribution door and the second air distribution door are provided with winding shafts in the left and right positions where the air conditioning case and the air mix door intersect so as to extend across the cold air bypass passage and the hot air passage, respectively, in one direction. Winding part of both the cold air opening area and the hot air opening area of the right passage is closed by winding, and winding of the cold air passage area of both the cold air passage and the hot air opening area of the left passage is closed by winding in the other direction. A vehicle air conditioner characterized in that it is a roll-up left / right film door that partially closes . The vehicle air conditioner according to claim 1 or 2,
Door opening control for controlling the opening degree of one of the first air distribution door and the second air distribution door in response to an increase / decrease request of the first passage air distribution amount and the second passage air distribution amount during the air distribution amount control. And an air-conditioning apparatus for a vehicle, characterized in that air distribution control means for performing total air volume control by a blower is provided . In the vehicle air conditioner according to claim 3 ,
The air distribution control means is a door that keeps both the first air distribution door and the second air distribution door fully open when an increase / decrease in the uniform air distribution is required to make the first passage air distribution equal to the second passage air distribution. A vehicle air conditioner that performs opening degree control and total air volume increase / decrease control by increasing / decreasing the total air volume in response to an increase / decrease request . In the vehicle air conditioner according to claim 3 or 4 ,
The air distribution amount control means is configured to determine a door opening degree of the air distribution door on the air distribution amount reduction request side when the air distribution amount reduction request to reduce one of the first passage air distribution amount and the second passage air distribution amount is made. It is characterized by door opening control that closes according to the difference and total air volume reduction control that compensates for the increase in air distribution amount in the air distribution maintenance side passage due to the increase in ventilation resistance in the air distribution reduction side passage by reducing the total air volume A vehicle air conditioner. The vehicle air conditioner according to any one of claims 3 to 5,
The air distribution control means determines the difference between the air distribution amount and the door opening degree of the air distribution door on the air distribution maintaining side when requesting an increase in the air distribution amount to increase one of the first passage air distribution amount and the second passage air distribution amount. Door opening control that closes according to the air flow, and total air volume increase control that compensates for the shortage of the increase in air distribution volume in the air distribution volume increase side passage due to the increase in ventilation resistance in the air volume maintenance side path by increasing the total air volume A vehicle air conditioner characterized by the above. The vehicle air conditioner according to any one of claims 1 to 6,
The air mix door includes a first air mix door that controls a mixing ratio of cold air and hot air in the first passage, and a second air mix door that controls a mixing ratio of cold air and hot air in the second passage. Have
There is provided temperature adjustment control means for adjusting the blowing temperature passing through the first passage and the blowing temperature passing through the second passage in both passages by door opening control of the both air mix doors. Air conditioner for vehicles.

Images