JP3994762B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner including an air conditioning unit of an independent temperature control system that blows out air-conditioned air independently on the left seat side and the right seat side, for example, particularly when a maximum heating condition is set It is related with the structure of the air-conditioning unit which aimed at the improvement of the heating capability of.
[0002]
[Prior art]
Conventionally, in this type of vehicle air conditioner, a first air passage that communicates with the air outlet on the left seat side in the vehicle interior and a second air passage that communicates with the air outlet on the right seat side in the vehicle interior are formed. Various first and second opening / closing means provided in the first and second air passages for opening and closing, and heating means for heating the conditioned air flowing in the first and second air passages using engine cooling water as a heat source And a temperature adjusting means for adjusting the air temperature by adjusting the amount of heating of the conditioned air by the heating means, the first and second air passages being independent of each other. Some air-conditioning units use an independent left and right temperature control system that controls the blowing of conditioned air.
[0003]
As the temperature adjusting means, for example, a hot air passage through which the hot air passes through the heating means and a cold air bypass passage through which the cold air flows by bypassing the heating means are formed in the first and second air passages, respectively. There is an air mix door that adjusts the air volume ratio between the air volume passing through the hot air passage and the air volume passing through the cold air bypass passage.
[0004]
Further, the various first and second opening / closing means and the respective air mix doors are provided with driving means which are actuators for driving them. As a result, the left seat side and the right seat side independently control the blowout temperature of the conditioned air to improve the comfort for passengers in each seat.
[0005]
[Problems to be solved by the invention]
However, according to the above configuration, in order to control the left seat side and the right seat side independently, various first and second opening / closing means and respective air mix doors are provided at least on both side surfaces of the air conditioning unit. A mounting space for providing driving means for driving is required. Moreover, in recent years, there is an increasing demand for downsizing the air conditioning unit in order to expand the vehicle interior space.
[0006]
Therefore, if the air conditioning unit is simply made small in response to this requirement, the ventilation area of the first and second air passages is reduced, so that the pressure loss increases and the air volume is greatly reduced, resulting in reduced performance and noise. Has the problem of becoming larger. In particular, according to the air conditioning unit having the above-described configuration, when the blowing mode is the foot mode in which the conditioned air is blown to the feet of the occupant under the maximum heating condition such as the start of the heating operation, the air volume is significantly reduced, and the heating means There is a problem that can not fully demonstrate the heating capacity.
[0007]
Accordingly, an object of the present invention is to take the above points into consideration, and when the maximum heating condition is set, the heating capacity is improved by arranging a ventilation path that maximizes the amount of air blown from the foot outlet. An object of the present invention is to provide a vehicle air conditioner that can be improved.
[0008]
[Means for Solving the Problems]
Above purpose In order to achieve: Claim 2 The technical means described in is adopted. That is, in the first aspect of the invention, the first air passage (14a) that communicates with the air outlet on one side of the vehicle interior and the second air passage (14b) that communicates with the air outlet on the other side of the vehicle interior are formed. An air conditioning case (21) for heating, heating means (23) for heating conditioned air flowing in the air conditioning case (21) using engine cooling water as a heat source, and the first air passage (14a) and the second air passage (14b). The temperature adjusting means (26a, 26b), which are respectively arranged, adjust the air temperature by adjusting the heating amount of the conditioned air by the heating means (23), and the first air passage (14a) on the downstream side of the heating means (23). ) And the second air passage (14b), and foot openings (38a, 38b, 39a, 39b) connected to foot outlets for blowing conditioned air toward the feet of passengers in the passenger compartment, Foot open Parts (38a, 38b, 39a, 39b) are disposed upstream of, the foot opening (38a, 38b, 39a, 39b) and the foot opening and closing member for opening and closing the (36a, 36b), The first air passage (14a) and the second air passage (14b) are disposed in the first air passage (14a) and the second air passage (14b), respectively, bypass the foot opening / closing members (36a, 36b), and the foot opening (38a, 38b, 39a) from the heating means (23). , 39b) is provided in each of the hot air bypass passages (43a, 43b) and the hot air bypass passages (43a, 43b), and the warm air bypass passages (43a, 43b) are opened and closed in conjunction with each other. Wind bypass passage opening and closing members (44a, 44b); In a vehicle air conditioner comprising an air conditioning unit (20) of a left and right independent temperature control system that controls the blowing of conditioned air independently in a first air passage (14a) and a second air passage (14b),
The hot air bypass passage opening / closing members (44a, 44b) are driven by one drive means (45), and when both temperature adjusting means (26a, 26b) are set to the maximum heating condition, When the hot air bypass passages (43a, 43b) are opened and either one of the temperature adjusting means (26a, 26b) is set to the maximum heating condition, both hot air bypass passages (43a, 43b) are closed. Configured as It is characterized by that.
[0009]
According to the first aspect of the present invention, in a vehicle air conditioner including this type of left and right independent temperature control type air conditioning unit (20), generally, for example, the left seat side and the right seat side are independent. In order to control the air blowing, at least the opening and closing members (36a, 36b) such as various control doors and temperature adjusting means (26a, 26b) for driving the temperature are driven on both side surfaces of the air conditioning unit (20). Driving means such as an actuator are required for the left seat side and the right seat side, respectively, and a space for mounting the driving means is also required. Furthermore, in order to expand the passenger space in the passenger compartment, there is an increasing demand for downsizing the air conditioning unit (20).
[0010]
By the way, if the air conditioning unit (20) is miniaturized according to the demand, the ventilation area of the first and second air passages (14a, 14b) is narrowed, the ventilation resistance is increased, and the air volume is reduced. Therefore, In the present invention, the hot air bypass passages (43a, 43b) and the hot air bypass passage opening / closing members (44a, 44b) for opening and closing the hot air bypass passages (43a, 43b) are provided in one drive. The hot air bypass passage opening / closing member (44a, 44b) is driven by both hot air bypasses when driven by the means (45) and both temperature adjusting means (26a, 26b) are set to the maximum heating condition. By being configured to open the passage (43a, 43b), The warm air passing through the foot opening / closing members (36a, 36b) and the warm air passing through the warm air bypass passages (43a, 43b) are guided to the foot openings (38a, 38b, 39a, 39b), and the passage area of The expansion reduces the draft resistance and increases the air volume. Thereby, since the heating amount of a heating means (23) can be exhibited to the maximum, the heating capacity can be improved.
[0011]
Also, Either air passage (14a, 14b) side When the heating amount is less than the maximum, for example , When blowout control is performed to reach the set temperature desired by the passenger, Both hot air bypass passages (43a, 43b) are closed to the side where the blowout control is performed. There is no loss of comfort.
[0012]
Therefore, when the heating operation is started, for example, when both the left seat side and the right seat side are under the maximum heating condition, the warm air that has passed through the heating means (23) is opened through the warm air bypass passages (43a, 43b). The rise characteristic of heating is improved by guiding to the part (38a, 38b, 39a, 39b).
[0014]
Also By driving the hot air bypass passage opening / closing members (44a, 44b) by one drive means (45), the mounting space of the drive means (45) is reduced, the number of parts can be reduced, and the cost can be reduced. .
[0015]
Claim 2 In the invention described in the above, in the air conditioning case (21), the cold air bypass (29a, 29b) through which the hot air passes through the heating means (23) and the cold air bypass through which the hot means (23) flows and the cold air flows. The passages (25a, 25b) are formed in the first air passage (14a) and the second air passage (14b), respectively, and the temperature adjusting means (26a, 26b) passes through the hot air passages (29a, 29b). Air mix doors (26a, 26b) for adjusting the air volume ratio between the air volume to be passed and the air volume passing through the cold air bypass passages (25a, 25b) By It is characterized by the construction.
[0016]
Claim 2 According to the invention described in the above, the temperature adjusting means (26a, 26b) for adjusting the blowing temperature is constituted by the air mix doors (26a, 26b). In the ventilation system of the air passage that adjusts the air volume ratio with the wind, since the cold air and the hot air are mixed and then led to various outlets, the air passages of the first and second air passages (14a, 14b) become long. Ventilation resistance increases.
[0017]
In addition, the ventilation resistance is significantly increased by allowing the conditioned air to pass through the heating means (23) during heating, as compared with the cold air that bypasses the heating means (23) during cooling. Therefore, by providing the warm air bypass passages (43a, 43b) separately, the air flow area of the ventilation system is increased, thereby increasing the air volume during heating and improving the heating capacity.
[0018]
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to an automotive air conditioner that independently controls the blowing temperature to the driver's seat as one of the air outlets in the vehicle interior and the passenger seat as the other air outlet in the vehicle interior. A form is demonstrated based on FIG. 1 thru | or FIG. As shown in FIG. 1, the ventilation system of the vehicle air conditioner according to the present embodiment is roughly divided into two parts: a blower unit 1 and an air conditioning unit 20.
[0020]
The blower unit 1 is arranged offset from the central part to the passenger seat side in the lower part of the instrument panel in the passenger compartment, whereas the air conditioning unit 20 is in the vehicle left-right direction in the lower part of the instrument panel in the passenger compartment. It is arrange | positioned in the approximate center part.
[0021]
As is well known, the blower unit 1 includes an inside / outside air switching box 2 for switching between the inside air (vehicle interior air) and the outside air (vehicle outside air), and centrifugal as a blowing means for sucking air through the inside / outside air switching box 2 for blowing air. It is comprised from the type electric blower 3.
[0022]
The inside / outside air switching box 2 is formed with an inside air inlet 4 and an outside air inlet 5, and each inlet is selectively opened and closed at a portion where the inside air inlet 4 and the outside air inlet 5 are separated. An inside / outside air switching door 6 is provided. The inside / outside air switching door 6 is connected to a servo motor 7 (see FIG. 2) as driving means.
[0023]
The centrifugal electric blower 3 includes a centrifugal fan 8, a blower motor 9 for driving the centrifugal fan 8, and a scroll casing 10 that houses the centrifugal fan 8. The blower voltage applied to the blower motor 9 is controlled by a blower motor controller 11 (see FIG. 2) that is a driving means.
[0024]
As shown in FIGS. 1 and 3, the air conditioning unit 20 includes an evaporator 22 that forms air cooling means in one common air conditioning case 21, and a heater core 23 that is a heating means as an air heating means on the downstream side of the air. Both are integrated into the unit.
[0025]
The air conditioning case 21 is made of a resin molded product having a certain degree of elasticity and excellent strength, such as polypropylene. The air-conditioning case 21 is specifically composed of a plurality of divided cases. The plurality of divided cases accommodate the devices such as the heat exchangers 22 and 23 and a door described later, and then a fastening means such as a metal spring clip or a screw. Thus, the air conditioning unit 20 is configured by being integrally coupled. The air conditioning case 21 is connected to the air outlet side portion of the scroll casing 10.
[0026]
Further, a partition plate 24 (see FIG. 1) is disposed in the air conditioning case 21 on the air upstream side of the heater core 23, and the temperature is adjusted by adjusting the opening of the first air mix door 26a described later by this partition plate. Second air for guiding the conditioned air, which has been temperature-adjusted by adjusting the opening of the first air passage 14a and the second air mix door 26b, which will be described later, to the driver's seat in the passenger compartment. A passage 14b is formed.
[0027]
In the air conditioning case 21, first and second cold air bypass passages 25 a and 25 b are formed on both sides of the heater core 23 (upper and lower sides in FIG. 1) so that the cold air cooled by the evaporator 22 bypasses the heater core 23. ing.
[0028]
Further, first and second air mixing doors 26a and 26b, which are first and second temperature adjusting means, are provided on the air upstream side of the heater core 23, and these doors 26a and 26b are provided with driving means. The first and second servomotors 27a and 27b (see FIG. 2), which are the first and second temperature adjusting means, are connected to each other. The servo motors 27a and 27b incorporate potentiometers 56a and 56b (see FIG. 2) that detect the actual positions of the air mix doors 26a and 26b by detecting the rotation angles of the output shafts of the respective motors. Yes.
[0029]
The air volume ratio between the amount of warm air passing through the heater core 23 above the partition plate 24 (see FIG. 1) and the amount of cool air passing through the first cold air bypass passage 25a is adjusted by the opening degree of the first air mix door 26a. The ratio of the amount of warm air passing through the heater core 23 below the partition plate 24 (see FIG. 1) and the amount of cold air passing through the second bypass passage 25b is adjusted by the opening of the second air mix door 26b. .
[0030]
The evaporator 22 is a heat exchanger constituting a well-known refrigeration cycle that is pipe-coupled with a compressor, a condenser, a receiver, and a decompressor (not shown), and dehumidifies and cools the air in the air conditioning case 21. The compressor is connected to an automobile engine via an electromagnetic clutch (not shown), and is controlled to be stopped by intermittently controlling the electromagnetic clutch.
[0031]
In addition, the heater core 23 is a heat exchanger that uses cooling water of the automobile engine as a heat source. As shown in FIG. Reheat the cold air cooled in step (1).
[0032]
Further, in the air conditioning case 21, a wall surface 28 that extends in the vertical direction with a predetermined interval from the heater core 23 is integrally formed in the air conditioning case 11 on the air downstream side (the vehicle rear side portion) of the heater core 23. Yes. The wall 28 guides the warm air upward through the first and second warm air passages 29a and 29b immediately after the heater core 23.
[0033]
Further, in the air conditioning case 21, mixing of cold air and hot air is performed on the air downstream side (upper side) of the first and second cold air bypass passages 25a and 25b and the first and second hot air passages 29a and 29b. First and second air mixing portions 30a and 30b are formed. And in the downstream end of the 1st, 2nd air mixing part 30a, 30b, and the upper part of the air-conditioning case 21, defroster opening part 31a, 31b is opened to the vehicle front direction upper part in the site | part of the vehicle front side. Is formed. The defroster openings 31a and 31b are supplied with temperature-controlled air from the first and second air mixing sections 30a and 30b, and are connected to a defroster outlet through a defroster duct (not shown). Air-conditioned air is blown out from the outlet toward the inner surface of the front window glass of the vehicle.
[0034]
The defroster openings 31a and 31b are opened and closed by defroster doors 32a and 32b, which are flat defroster opening and closing members. The defroster doors 32a and 32b are installed on the upstream side of the defroster openings 31a and 31b, and are arranged in the horizontal direction in the vicinity of the upper surface of the air conditioning case 21 and adjacent to the upper ends of the defroster openings 31a and 31b. It is rotatably supported by a rotation shaft.
[0035]
Next, face openings 33a and 33b are formed at positions closer to the rear of the vehicle (close to the occupant) than the defroster openings 31a and 31b, and temperature-controlled conditioned air is supplied to the face openings 33a and 33b. 1. It flows in through the 2nd air mixing parts 30a and 30b.
[0036]
Further, the face openings 33a and 33b are connected to a face air outlet disposed on the upper side of the central portion of the instrument panel through a face duct (not shown), from the air outlet to the driver seat side and the passenger seat side. Air conditioned air is blown toward the passenger's head.
[0037]
The face openings 33a and 33b are opened and closed by flat face doors 34a and 34b. The face doors 34a and 34b are installed on the upstream side of the face openings 33a and 33b, and are rotatably supported by a rotation shaft arranged in the horizontal direction.
[0038]
Next, in the air conditioning case 21, foot passage introducing portions 35a and 35b are formed in the vehicle rear side portions of the face doors 34a and 34b. Air-conditioned air whose temperature is controlled flows from the first and second air mixing portions 30a and 30b into the foot passage introducing portions 35a and 35b.
[0039]
Foot passages 37a and 37b are formed on the air downstream side of the foot passage introducing portions 35a and 35b, and front seat foot openings 38a and 38b, which are foot openings, are provided in the middle of the foot passages 37a and 37b. Is formed. Air-conditioned air from the front-seat foot openings 38a and 38b is blown out through the front-seat foot duct (not shown) and the front-seat foot outlet to the passenger's feet on the driver seat side and the passenger seat side of the front seat.
[0040]
Further, rear foot openings 39a and 39b, which are foot openings, are formed at the end portions of the foot passages 37a and 37b, and a rear seat foot duct (not shown) and a rear seat foot outlet are connected, The wind is blown out to the passenger's feet on the driver seat side and the passenger seat side of the rear seat through the rear seat foot outlet. The foot passage introducing portions 35a and 35b are opened and closed by foot doors 36a and 36b which are flat foot opening and closing members. The foot doors 36a and 36b are installed in the vicinity of the foot passage introducing portions 35a and 35b, and are rotatably supported by a rotating shaft arranged in the horizontal direction.
[0041]
Among them, a servo motor 40 (see FIG. 3) as a driving means is connected to the face door 34a and the foot door 36a, and a servo motor 41 (see FIG. 3) as a driving means is connected to the defroster doors 32a and 32b. Has been. In addition, a servo motor 42 (see FIG. 3) as a driving means is connected to the face door 34b and the foot door 36b. Thereby, it is comprised so that blowing control of the blowing mode independent by the 1st and 2nd air passages 14a and 14b can be performed. The defroster doors 32 a and 32 b are opened and closed in conjunction with the driving of a single servo motor 41.
[0042]
Next, the hot air bypass passages 43a and 43b, which are the main parts of the present invention, will be described. The warm air bypass passages 43a and 43b of the present embodiment are configured in the air conditioning case 21 so that the amount of warm air blown from the foot outlets on the driver's seat side and the passenger seat side is maximized. For this reason, in the air conditioning case 21, hot air bypass passages 43 a and 43 b are formed on the wall surface 28 on the downstream side of the heater core 23. The warm air bypass passages 43a and 43b bypass the foot passage introduction portions 35a and 35b and the foot doors 36a and 36b, and pass through the foot passages 37a and 37b. The front seat foot openings 38a and 38b and the rear seat foot A bypass passage that guides warm air to the openings 39a and 39b, and when the foot doors 36a and 36b are open, the warm air that has passed through the heater core 23 is directly guided to the foot passages 37a and 37b. The improvement of the heating capacity by increasing the amount of warm air in the foot mode during heating by reducing the ventilation resistance of the ventilation path leading to the openings 38a, 38b and the rear seat foot openings 39a, 39b It is.
[0043]
The hot air bypass passages 43a and 43b are provided with hot air bypass doors 44a and 44b which are flat hot air bypass passage opening and closing members, and the first and second air mix doors 26a which are temperature adjusting means, It is made to open and close according to the opening degree of 26b. Accordingly, the hot air bypass doors 44a and 44b are connected to a servo motor 45 (see FIG. 3) as a driving means, and the hot air bypass doors 44a and 44b are interlocked with each other by driving one servo motor 45. The wind bypass passages 43a and 43b are opened and closed.
[0044]
Incidentally, when the opening degree of the first and second air mix doors 26a and 26b closes both the first and second cold air bypass passages 25a and 25b, the hot air bypass passages 43a and 43b are opened. When one of the first and second air mix doors 26a, 26b is opened, it is controlled by the control device 50 described later so as to close the hot air bypass passages 43a, 43b.
[0045]
Next, the configuration of the control system of this embodiment will be described. As shown in FIG. 3, in addition to the potentiometers 56a and 56b, the control device 50 that controls the air conditioner includes an internal air temperature sensor 51 that detects the air temperature inside the vehicle, an external air temperature sensor 52 that detects the air temperature, A solar radiation sensor 53 that detects the amount of solar radiation irradiated into the room, a post-evaporator sensor 54 that detects the air temperature immediately after passing through the evaporator 22, and a water temperature sensor 55 that detects the engine cooling water temperature in the heater core 23 are electrically connected. It is connected to the. These sensors are environmental condition detection means.
[0046]
An operation signal from the operation unit 60 is also input to the control device 50. The operation unit 60 includes a driver-seat-side temperature setter 61a that is a set-temperature input means for setting a target temperature on the driver's seat, a passenger-side temperature setter 61b that sets a target temperature on the passenger's seat, and an automatic An AUTO switch 62 for setting the control state, a manual air flow rate changeover switch 63 as airflow rate setting means, a manual air / outside air changeover switch (not shown), a manual air outlet mode changeover switch (DEF, FACE, FOOT, bi-level (B / L), foot differential (F / D)) and the like. In addition, this operation part 60 is installed on the instrument panel provided in the vehicle interior front.
[0047]
The control device 50 is a well-known device having an A / D converter, a microcomputer, etc. (not shown) inside, and signals from the sensors 51 to 55 and the potentiometers 56a and 56b are converted to the A / D converter. After being A / D converted by the device, it is input to the microcomputer. The microcomputer is a well-known computer having a CPU, ROM, RAM, standby RAM, I / O port, etc. (not shown). When the engine ignition switch is turned on, power is supplied from a battery (not shown). The
[0048]
Next, the operation of the present embodiment having the above configuration will be described. As is well known, the vehicle air conditioner of the present embodiment is an output signal of the control device 50 to which operation signals from various operation switches provided in the operation unit 60 and sensor signals from various sensors for air conditioning control are input. Thus, the rotational positions of the control door members 26a, 26b, 32a, 32b, 34a, 34b, 36a, 36b, 44a, 44b are controlled by servo motors 27a, 27b, 40, 41, 42, 45 as driving means. The
[0049]
Here, the temperature of the air blown into the passenger compartment is adjusted by the servo motors 27a and 27b, cooled by the evaporator 22 and directly flowing to the first and second cold air bypass passages 25a and 25b, and heated by the heater core 23. The first and second air mix doors 26a and 26b are rotated to adjust the air volume ratio. And after mixing by the 1st, 2nd air mixing part 30a, 30b, it blows off from the predetermined blower outlet of the driver's seat side and passenger's seat side in a vehicle interior via each opening part according to blowing mode.
[0050]
By the way, in this embodiment, it blows out to a passenger | crew's step among blowing modes, for example, in a foot mode, both the 1st, 2nd air mix doors 26a and 26b are in the rotation position where the heating amount of the heater core 23 becomes the maximum. When the maximum heating condition is set, the controller 50 controls the servo motor 45 so that the hot air bypass doors 44a and 44b are interlocked to open the hot air bypass passages 43a and 43b. ing. The maximum heating condition is specifically when the first and second air mix doors 26a and 26b are in positions where the first and second cold air bypass passages 25a and 25b are closed.
[0051]
Thereby, the warm air that has passed through the heater core 23 is guided to the foot passages 37a and 37b through the warm air bypass passages 43a and 43b, so that the foot passages 37a and 37b have the first and second air mixing portions 30a and 30b. And warm air is guide | induced from the warm air bypass passages 43a and 43b. Therefore, the air flow increases and the heating capacity can be increased by reducing the ventilation resistance of the ventilation path leading to the front seat foot openings 38a and 38b and the rear seat foot openings 39a and 39b.
[0052]
In addition, when the heating amount of one of the first and second air passages 14a and 14b is less than the maximum, that is, any one of the first and second air mix doors 26a and 26b is the first and second cold air. When the bypass passages 25a and 25b are opened and the blowout control is performed so as to reach the set temperature desired by the occupant, the hot air bypass passages 43a and 43b are closed. Thereby, the comfort to the side where the blowing control is performed is not impaired.
[0053]
According to the vehicle air conditioner of the embodiment described above, in the vehicle air conditioner including the air conditioning unit 20 of the left and right independent temperature control system, for example, the left seat side and the right seat side generally blow out independently. Servo motors as drive means for driving the control door members 26a, 26b, 32a, 32b, 34a, 34b, 36a, 36b, 44a, 44b at least on both side surfaces of the air conditioning unit 20 for control 27a, 27b, 40, 41, 42, and 45 are required for the left seat side and the right seat side, respectively, and a mounting space for these driving means is also required. Further, there is an increasing demand for downsizing the air conditioning unit 20 in order to expand the passenger space in the passenger compartment.
[0054]
By the way, if the air conditioning unit 20 is miniaturized according to the demand, the ventilation area of the first and second air passages 14a and 14b is narrowed, the ventilation resistance is increased, and the air volume is reduced. Therefore, the present invention provides hot air bypass passages 43a and 43b that bypass the foot doors 36a and 36b from the heater core 23 and communicate with the front seat foot openings 38a and 38b and the rear seat foot openings 39a and 39b. When the maximum heating condition in which both the first and second air mix doors 26a and 26b are operated is set at the position where the amount is maximum, the hot air that has passed through the heater core 23 passes through the hot air bypass passages 43a and 43b. By guiding to the front seat foot openings 38a and 38b and the rear seat foot openings 39a and 39b, the warm air passing through the foot doors 36a and 36b and the hot air passing through the hot air bypass passages 43a and 43b are moved forward. It is led to the seat foot openings 38a and 38b and the rear seat foot openings 39a and 39b. The amount is increased. Thereby, since the heating amount of the heater core 23 can be exhibited to the maximum, the heating capacity can be improved.
[0055]
In addition, guiding the warm air that has passed through the heater core 23 through the warm air bypass passages 43a and 43b to the front seat foot openings 38a and 38b and the rear seat foot openings 39a and 39b, When the maximum heating condition for operating the air mix doors 26a and 26b is set, when the heating amount on either the first and second air passages 14a and 14b is less than the maximum, for example, the passenger When the blowing control is performed so as to reach the desired set temperature, the comfort is not impaired by giving priority to the blowing control.
[0056]
Accordingly, when the heating operation is started, for example, when both the left seat side and the right seat side are in the maximum heating condition, the warm air that has passed through the heater core 23 passes through the warm air bypass passages 43a and 43b and the front seat foot opening 38a. , 38b and the rear seat foot openings 39a and 39b, the heating start-up characteristics are improved.
[0057]
Further, by driving the hot air bypass doors 44a and 44b by one servo motor 45, the mounting space for the servo motor 45 can be reduced, the number of parts can be reduced, and the cost can be reduced.
[0058]
Further, since the first and second air mix doors 26a and 26b are used as the temperature adjusting means, the air passage for adjusting the air volume ratio between the cold air and the hot air by the first and second air mix doors 26a and 26b. In this ventilation system, since the ventilation system that reaches each opening becomes longer in order to mix cold air and warm air, the ventilation resistance also increases. Furthermore, by allowing the conditioned air to pass through the heater core 23 at the time of heating, the ventilation resistance is significantly increased as compared with the cold air that bypasses the heater core 23 at the time of cooling. Therefore, by providing the warm air bypass passages 43a and 43b separately, the air flow area of the ventilation system is increased, so that the air volume during heating can be increased and the heating capacity can be improved.
[0059]
(Other embodiments)
In the above embodiment, the hot air bypass doors 44a and 44b are provided separately in the first and second air passages 14a and 14b, respectively, and are configured to be linked to opening and closing. The hot air bypass doors 44a and 44b may be formed integrally with each other.
[0060]
Further, in the above embodiment, the first and second air mix doors 26a for adjusting the air volume ratio between the cold air and the hot air as temperature adjusting means for adjusting the air temperature by adjusting the heating amount of the conditioned air by the heater core 23, 26b is used, but instead of the first and second air mix doors 26a and 26b, a flow rate of warm water flowing into the heater core 23 or a warm water valve that adjusts the temperature of the warm water is used. The present invention is also applicable to an air conditioner of a type that adjusts the air temperature by adjusting the (or hot water temperature).
[0061]
In the above embodiment, the evaporator 22 is disposed in the air conditioning unit 20, but it goes without saying that the present invention can be similarly applied to an air conditioner of a type that does not have the cooling heat exchanger. . Further, it goes without saying that the present invention can be similarly applied to an air conditioner in which the rear seat foot openings 39a and 39b in the above embodiment are eliminated.
[0062]
Furthermore, although the above embodiment demonstrated the air-conditioning unit 20 of the left-right independent control system which controls discharge of conditioned air independently on the driver's seat side and the passenger seat side, the present invention is not limited to this, and the front seat side and the rear seat Needless to say, the present invention can be applied to an air-conditioning apparatus that performs blowout control independently on the side.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an overall configuration of an air conditioning unit 10 according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing the overall configuration of a blower unit 1 and an air conditioning unit 10 according to an embodiment of the present invention.
FIG. 3 is a system diagram showing a control system of a control device 50 according to an embodiment of the present invention.
[Explanation of symbols]
14a ... 1st air passage
14b ... Second air passage
20 ... Air conditioning unit
21 ... Air conditioning case
23 ... Heater core (heating means)
25a ... 1st cold wind bypass passage (cold wind bypass passage)
25b ... second cold air bypass passage (cold air bypass passage)
26a ... 1st air mix door (temperature control means)
26b ... 1st air mix door (temperature control means)
29a, 29b ... Warm air passage
36a, 36b ... Foot door (foot opening and closing member)
38a, 38b ... Foot opening for front seat (foot opening)
39a, 39b ... rear seat foot opening (foot opening)
43a, 43b ... Hot air bypass
44a, 44b ... Warm air bypass door (warm air bypass passage opening / closing member)
45 ... Servo motor (drive means)

Claims (2)

An air conditioning case (21) that forms a first air passage (14a) that communicates with the air outlet on one side of the vehicle interior and a second air passage (14b) that communicates with the air outlet on the other side of the vehicle interior;
Heating means (23) for heating conditioned air flowing in the air conditioning case (21) using engine cooling water as a heat source;
Temperature adjusting means (26a) which is disposed in each of the first air passage (14a) and the second air passage (14b) and adjusts the air temperature by adjusting the heating amount of the conditioned air by the heating means (23). 26b)
A foot outlet is provided in each of the first air passage (14a) and the second air passage (14b) on the downstream side of the heating means (23), and blows out conditioned air toward the feet of the passengers in the passenger compartment. Connected foot openings (38a, 38b, 39a, 39b);
A foot opening / closing member (36a, 36b) disposed upstream of the foot opening (38a, 38b, 39a, 39b) and opening and closing the foot opening (38a, 38b, 39a, 39b);
The first air passage (14a) and the second air passage (14b) are disposed in the first air passage (14a) and the second air passage (14b), respectively, bypass the foot opening and closing members (36a, 36b), and the foot opening ( 38a, 38b, 39a, 39b) and a warm air bypass passage (43a, 43b),
A hot air bypass passage opening / closing member (44a, 44b) that is disposed in each of the hot air bypass passages (43a, 43b) and opens and closes the hot air bypass passage (43a, 43b);
In a vehicle air conditioner comprising a left and right independent temperature control type air conditioning unit (20) that controls the blowout of conditioned air independently in the first air passage (14a) and the second air passage (14b),
The warm air bypass passage opening / closing member (44a, 44b) is driven by one driving means (45), and when both the temperature adjusting means (26a, 26b) are set to the maximum heating condition, Both hot air bypass passages (43a, 43b) are opened, and when either one of the temperature adjusting means (26a, 26b) is set to the maximum heating condition, both of the hot air bypass passages (43a, 43a, 43b) are set. 43b) is configured to close the vehicle air conditioner. The air conditioning case (21) includes a hot air passage (29a, 29b) through which the hot air passes through the heating means (23) and a cold air bypass passage (25a through which the cold air flows through the heating means (23). 25b) are formed in the first air passage (14a) and the second air passage (14b), respectively.
The temperature adjusting means (26a, 26b) is an air mix door (26a) that adjusts an air volume ratio between an air volume passing through the hot air passage (29a, 29b) and an air volume passing through the cold air bypass passage (25a, 25b). 26b) . The vehicle air conditioner according to claim 1, wherein

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