JP2008273498A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve air conditioning performance of an air conditioner for a vehicle while saving capacity. <P>SOLUTION: The air conditioner for the vehicle includes air conditioning units 1, 2 performing temperature adjustment of conditioned air blown out to inside of a cabin; air outlet parts provided in a plurality of portions of inside the cabin and blowing out the conditioned air of which temperature is adjusted by the air conditioning units 1, 2 toward inside of the cabin; and a conditioned air blowing out control means 100 for performing switching control of the air outlet parts for blowing out conditioned air. The conditioned air blowing out control means 100 performs cool-down control for first, blowing out the conditioned air toward an area in the vicinity of the face of an occupant, then, blowing out the conditioned air toward an area in the vicinity of a contact part of the occupant with a seat 6, and then, blowing out the conditioned air toward an area in the vicinity of the hands of the occupant. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner that controls air conditioning of a passenger compartment.

The conventional vehicle air conditioner is in the initial stage of the cool-down control when the temperature difference between the room air temperature and the set temperature or the temperature difference between the room air and the target outlet temperature TAO is equal to or greater than a predetermined temperature difference. First, a spot direct wind is blown toward the vicinity of the occupant's face for a predetermined time, and then, in addition to the direct wind, the conditioned air from the outlet is controlled so as to cool the contact portion between the occupant and the interior material. There is something like that (see, for example, Patent Document 1). Thereby, the passenger | crew can obtain a comfortable state in the initial stage of cool-down control.
JP 2006-76503 A

  However, there are parts where the occupant is likely to feel cold due to the blowing of the conditioned air other than the face of the occupant and the contact portion between the occupant and the interior material. It is insufficient to improve the immediate effect of indoor air conditioning. Moreover, according to the description of Patent Document 1, energy saving and high efficiency which are problems of the vehicle air conditioner are not described.

  An object of this invention is to improve the air-conditioning performance of a vehicle air conditioner by power saving in view of the said point.

  In order to achieve the above object, according to the present invention, at least the air conditioning unit (1, 2) for adjusting the temperature of the air conditioning air blown into the vehicle interior and the air conditioning air temperature adjusted by the air conditioning unit (1, 2) are used. Near the occupant's face, the contact portion between the occupant and the seat (6), the blowout part that can blow out toward the blowout target including the vicinity of the occupant's hand, and the air-conditioning wind blowout that controls the blowout of the conditioned air blown from the blowout part Control means (100), and the conditioned air blowing control means (100) first blows conditioned air near the occupant's face, and then blows conditioned air near the contact portion between the occupant and the seat (6). It is characterized by cool-down control that blows air-conditioned air near the passenger's hand.

  According to this, first, the skin cold spot distribution (the distribution of sensory points that feel cold) is high, the amount of sweating is high, the heat exchange rate is high when exposed to the outside air, and the face part that the occupant wants to cool is cooled, Next, the skin cold spot distribution (the distribution of sensory points that feel cold) is high, the amount of perspiration is large, and the contact portion between the seat (6) having the heat mass and the occupant is cooled.

  Thereby, the body surface temperature of the occupant can be rapidly lowered by blowing the conditioned air preferentially to the occupant's face having a high skin cold spot distribution and the contact portion between the seat (6) and the occupant. Here, the contact portion between the occupant and the seat (6) of the present invention indicates the waist or the like corresponding to the seating surface of the occupant and the back of the occupant corresponding to the backrest portion of the seat (6).

  In the present invention, after the contact portion between the seat and the occupant is cooled, it is exposed to the outside air similarly to the face portion, and the heat exchange rate is high, and the occupant is next to the contact portion between the face, the seat (6) and the occupant. Cool your hands, which is the part you want to cool.

  Here, in general, the human body adjusts the deep temperature in the peripheral part of the limbs by radiating heat at the peripheral part of the limbs by circulating blood to keep the deep temperature in a certain temperature range. By cooling a hand or the like, it is possible to efficiently dissipate the deep temperature inside the body that has risen due to outside air or the like.

  In addition, the above blowout timing also considers that the human deep body temperature is less likely to change compared to the body surface temperature, and lowers the body surface temperature of the part with a high skin cold spot distribution, and then the deep body temperature. The air conditioning efficiency of the vehicle interior air conditioning can be improved by blowing the conditioned air to each body part of the passenger so as to dissipate the heat.

  In this way, the air-conditioning wind blowing timing to the occupant is the first part of the occupant's face, then the contact area between the seat (6) and the occupant, and then the occupant's hand, improving the immediate effectiveness of the air conditioning in the vehicle and improving the air-conditioning efficiency By doing so, the air conditioning performance of the vehicle air conditioner can be improved with reduced capacity.

  Here, in the air-conditioning air blowing control by the air-conditioning air blowing control means (100), when a plurality of blowing portions are provided, the control for selecting from which blowing air the blowing air is blown, the blowing direction of the blowing portion Control. Further, the blowout control includes control for sucking air in the passenger compartment and circulating the conditioned air into the passenger compartment, and control of the operation of the air conditioning units (1, 2).

  In the cool-down control, the conditioned air blowing control means (100) first blows conditioned air near the occupant's face, and then toward the contact portion between the occupant and the seat (6) in addition to the occupant's face. Then, the conditioned air may be blown out, and then the conditioned air may be blown out near the passenger's hand in addition to the vicinity of the passenger's face and the vicinity of the contact portion between the passenger and the seat (6).

  Further, in the cool-down control, the conditioned air blowing control means (100) blows conditioned air only near the occupant's face, and then blows conditioned air only near the contact portion between the occupant and the seat (6). Alternatively, the conditioned air may be blown only near the passenger's hand. According to this, the air conditioning capability can be concentrated by shifting the timing with respect to each part of the body of the occupant.

  The blow target includes the vicinity of the occupant's chest or arm, and the air-conditioning air blowing control means (100) blows the conditioned air near the occupant's hand in the cool-down control, and then the vicinity of the occupant's chest or arm. You may make it blow off an air-conditioning wind toward at least one of these. According to this, it is possible to suppress deterioration of passenger comfort due to disturbance such as solar radiation.

  Moreover, the blowing part is comprised including the face blowing part (40, 41) which blows off an air conditioning wind toward a passenger | crew's upper body, and an air conditioning wind blowing control means (100) is a face blowing part (40 in a blowing part). , 41), air conditioned air may be blown out near the passenger's hand.

  In addition, the air conditioning apparatus includes an air direction adjusting means (46) that is provided in the blowing section and adjusts the blowing direction of the conditioned air, and at least a temperature detecting means that can detect a surface temperature of a portion to be blown out of the occupant's body. The wind blowing control means (100) determines the blowing direction of the conditioned air by the wind direction adjusting means (47) when the surface temperature of the part to be blown detected by the temperature detecting means is equal to or lower than a predetermined temperature. You may make it swing to the site | part direction used as and the site | part vicinity direction used as blowing object. According to this, it is possible to suppress the annoyance of the occupant and the draft feeling (excessive cooling), which are caused by concentrating the air conditioning capacity on the cooling target part (part to be blown out).

  Further, provided in the passenger compartment near the occupant and provided with a suction port for sucking in the conditioned air blown from the blowing portion, the air blowing control means (100) performs control to blow out the conditioned air from the blowing portion, When the blown-out air-conditioning air is sucked from the suction port, the air-conditioning air can be circulated around the occupant, so that the air-conditioning performance of the vehicle air-conditioning apparatus can be improved with reduced capacity.

  The occupant detection means (74) for detecting the occupant's boarding state is provided, and the air-conditioning wind blowing control means (100) performs cool-down control on the occupant detected by the occupant detection means (74). Good. According to this, it is possible to improve the air conditioning performance of the vehicle air conditioner with reduced capacity by blowing the conditioned air mainly on the occupant in accordance with the boarding state of the occupant on the vehicle.

  The air-conditioning air blowing control means (100) performs cool-down control only on the driver's seat when the passenger detected by the passenger detection means (74) is on the driver's seat only. The air conditioning capability can be concentrated on the passengers on board.

  The air conditioning unit (1) includes a right air conditioning unit (10) that air-conditions the right space in the vehicle interior and a left air conditioning unit (11) that air-conditions the left space in the vehicle interior. When an occupant is detected only in the right space or the left space, the air conditioning capability is concentrated on the occupant detected by the occupant detection means (74) by operating only the air conditioning unit (1) on the side where the occupant is detected. be able to.

  In addition, when the occupant detection means (74) detects the occupant only in the right space or the left space in the vehicle interior, the conditioned air blowing control means (100) only from the air outlet corresponding to the space on the side where the occupant is detected. By blowing out the conditioned air, the air conditioning capability can be concentrated on the occupant detected by the occupant detection means (74).

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a side view of an essential part of a vehicle having a vehicle air conditioner according to the present invention.

  As shown in FIG. 1, an instrument panel 3 (instrument panel) is disposed in the entire vehicle lateral direction in front of the front seat of the vehicle interior, and the interior of the instrument panel 3 is a room air conditioner that forms a main air conditioning unit of the vehicle air conditioner. Unit 1 (front air conditioning unit) is mounted. On the other hand, a console 4 (armrest part) is disposed between the right seat (driver seat side seat) and the left seat (passenger seat side seat) in the front seat 6 of the vehicle, and an auxiliary air conditioning unit is installed inside the console 4. The console air conditioning unit 2 is mounted.

  The instrument panel 3 is provided with face blowing portions 40 and 41 that blow out the conditioned air whose temperature is adjusted by the indoor air conditioning unit 1 from the instrument panel 3 toward the front side of the passenger compartment. A defroster blow-out portion 42 that is opened horizontally is provided at the foremost portion of the instrument panel 3. Although not shown, a foot outlet is provided below the instrument panel 3 so as to face the feet of the front seat. Here, the face blowing parts 40 and 41 face the front seat and are provided on the driver's seat side, the right center blowing part 40a, the right side face blowing part 41a and the left center face blowing part 40b provided on the passenger seat side, It is comprised from the left side face blowing part 41b.

  The face blowing sections 40 and 41 are provided with a wind direction adjusting grill for adjusting the blowing direction of the conditioned air shown in FIG. FIG. 2 shows a schematic view of the wind direction adjusting grill.

  As shown in FIG. 2, the wind direction adjusting grill 46 has a vertical louver 48 driven by a servo motor 47 described later swings left and right, and a horizontal louver 49 driven by a servo motor 47 described later swings up and down. It has become. Depending on the stop position of the vertical louver 48, the blowing direction in the left-right direction (vehicle left-right direction) of the conditioned air from the face blowing portions 40, 41 can be adjusted. Furthermore, the blowing direction in the vertical direction (vehicle vertical direction) of the conditioned air from the face blowing portions 40 and 41 can be adjusted by the stop position of the lateral louver 49. Here, the wind direction adjusting grill 46 corresponds to the wind direction adjusting means in the present invention.

  Returning to FIG. 1, the entrance / exit door 5 is provided with a door outlet 43 that blows out the conditioned air temperature adjusted by the indoor air conditioning unit 1 from the entrance / exit door 5 side toward the vehicle interior. The door outlets 43 are provided on the right and left entrance doors 5 of the vehicle, respectively.

  In addition, the said face blowing parts 40 and 41, the defroster blowing part 42, the foot blowing part, and the door blowing part 43 blow off the conditioned air temperature-controlled by the indoor air-conditioning unit 1 through the duct which is not shown in figure.

  In the console 4, a console blow-out unit 44 blows out the conditioned air whose temperature is adjusted by the console air-conditioning unit 2 from the space between the right seat (driver seat side seat) and the left seat (passenger seat side seat) toward the front side of the vehicle interior. Is provided. Here, the console outlet 44 has a right outlet and a left outlet (not shown). Further, the seat 6 is provided with a sheet blowing portion 45 for blowing the conditioned air whose temperature is adjusted by the console air conditioning unit 2 from a large number of micro holes. The seat blowing part 45 has a blowing part for blowing conditioned air from the seating surface and the back surface of the occupant. The seating surface and the back surface of the occupant correspond to the contact portion between the occupant and the seat 6 in the present invention.

  In addition, the said console blowing part 44 and the sheet | seat blowing part 45 blow off the conditioned air temperature-controlled by the console air-conditioning unit 2 through the duct which is not shown in figure.

  Here, the door blowing part 43 and the console blowing part 44 correspond to the side blowing part in the present invention.

  Next, the indoor air conditioning unit 1 will be described with reference to FIGS. FIG. 3: has shown schematic sectional drawing which shows the air path structure of the left-right independent control in the indoor air-conditioning unit 1 of this invention.

  The indoor air conditioning unit 1 is disposed on the inside of the instrument panel 3 at the forefront of the vehicle interior, and has an air conditioning case 20 that constitutes an outer portion. Inside the air conditioning case 20, air passages 13 and 14 through which conditioned air is blown toward the vehicle interior are formed.

  The interior of the air conditioning case 20 is partitioned into a vehicle right side passage 13 (driver's seat side passage) and a vehicle left side passage 14 (passenger seat side passage) by a central partition 12 as shown in FIG. That is, in this embodiment, the indoor air-conditioning unit 1 includes a vehicle right-side air conditioning unit 10 and a vehicle left-side air conditioning unit 11 and can independently control the temperature of the conditioned air blown to the left and right regions of the vehicle interior. It is a method.

  Therefore, the vehicle right-side air conditioning unit 10 and the vehicle left-side air conditioning unit 11 are provided with the inside / outside air switching box 21, the blower 25, the evaporator 26, the heater core 27, the air mix door 29, and the openings 30 to 33, respectively. ing.

  Since the right side air conditioning unit 10 and the left side air conditioning unit 11 have the same configuration, the right side air conditioning unit 10 will be described with reference to FIG. 4 and the description of the left side air conditioning unit 11 will be omitted. Here, FIG. 4 shows a schematic cross-sectional view of the vehicle right-side air conditioning unit 10 and the console air-conditioning unit 2 of the vehicle air conditioner of the present invention.

  As shown in FIG. 4, an inside / outside air switching box 21 is arranged at the most upstream part of the air flow inside the air conditioning case 20. The inside / outside air switching box 21 is driven by an inside air introduction port 22 for introducing inside air (vehicle compartment air) into the air conditioning case 20, an outside air introduction port 23 for introducing outside air (vehicle compartment outside air) into the air conditioning case 20, and a servo motor 24a. The inside / outside air switching door 24 that is the inside / outside air switching means is provided.

  Here, the inside air introduction port 22 in the present embodiment is connected to a suction port provided at the foot of a right passenger (not shown) via an inside air introduction duct (not shown). Here, the suction port is provided in order to suck in the conditioned air blown from each blow-out unit and to circulate indoor air. In the vehicle left air conditioning unit 11, the suction port is provided at the foot of the left passenger.

  On the downstream side of the air flow of the inside / outside air switching box 21, an electric blower 25 that blows air toward the vehicle interior is disposed. The blower 25 blows air by rotating a known centrifugal multiblade fan 25a by an electric motor 25b. An evaporator 26, which is a cooling heat exchanger that cools the blown air, is disposed on the downstream side of the air flow of the blower 25.

  The evaporator 26 is one of the elements constituting a refrigeration cycle (not shown), and as is well known, absorbs heat from the blown air blown by the blower 25 when the low-pressure refrigerant flowing into the evaporator 26 evaporates. To cool the blown air. A heater core 27 that heats the air (cold air) that has passed through the evaporator 26 is disposed on the downstream side of the evaporator 26.

  The heater core 27 is a heating heat exchanger that reheats the air (cold air) that has passed through the evaporator 26 using the engine coolant as a heat source (the engine coolant circuit is not shown). In addition, a bypass passage 28 through which air (cold air) after passing through the evaporator 26 bypasses the heater core 27 and is passed to the side of the heater core 27 inside the air conditioning case 20 is formed.

  An air mix door 29 is disposed between the evaporator 26 and the heater core 27. The air mix door 29 is rotatably disposed in the air conditioning case 20, and is driven by a servo motor 29a so that its rotational position (opening) can be adjusted continuously.

  Therefore, the air volume ratio between the amount of air passing through the heater core 27 and the amount of air passing through the bypass passage 28 is adjusted by the opening of the air mix door 29, and the temperature of the air blown into the vehicle interior is adjusted.

  At the most downstream part of the vehicle right side passage 13 of the air conditioning case 20, a face opening 30 for blowing the conditioned air toward the upper half of the right occupant and a foot opening for blowing the conditioned air toward the foot of the right occupant 31, a defroster opening 32 for blowing conditioned air toward the front window glass of the vehicle, and a door opening 33 for blowing conditioned air from the side surface of the right passenger toward the upper body are provided. It has been.

  A face opening opening / closing door 34, a foot opening opening / closing door 35, a defroster opening opening / closing door 36, and a door opening opening / closing door 37 are rotatably arranged upstream of these openings 30 to 33, respectively. These doors 34 to 37 are opened and closed by a common servo motor 38 through a link mechanism (not shown).

  The face opening 30 is connected to the right center face blowing part 40a and the right side face blowing part 41a via a face duct (not shown). In the vehicle left side air conditioning unit 11, the face opening 30 is connected to the left center face blowing part 40b and the left side face blowing part 41b via a face duct (not shown).

  The foot opening 31 is connected to a right foot outlet (not shown) disposed near the foot of the right occupant via a foot duct (not shown). The defroster opening 32 is connected to a defroster outlet 42 on the upper surface of the vehicle instrument panel 3 via a defroster duct (not shown). The door opening 33 is connected to a door outlet 43 provided on the right entrance door 5 via a door duct (not shown).

  Next, the console air conditioning unit 2 will be described. The console air-conditioning unit 2 is basically the same as the configuration of the indoor air-conditioning unit 1 except that the left and right independent control is not performed, the inside / outside air switching box is not provided, and the arrangement of the openings is different. Therefore, the following is a brief description.

  The console air-conditioning unit 2 has a console air-conditioning case 50 that constitutes an outer portion. An air passage through which air flows toward the front seat and the rear seat in the passenger compartment is formed inside the console air conditioning case 50, and a suction port 51 for sucking in the passenger compartment air is provided in the most upstream part of the air flow. Has been placed.

  A blower 52 that blows air toward the passenger compartment is disposed on the downstream side of the air flow of the suction port 51. On the downstream side of the air flow of the blower 52, an evaporator 53 that is a cooling heat exchanger for cooling the blown air is disposed.

  On the downstream side of the evaporator 53, a heater core 54 for heating the air (cold air) after passing through the evaporator 53 is disposed. In addition, a bypass passage 55 through which air (cold air) after passing through the evaporator 53 passes by bypassing the heater core 54 is formed on the side of the heater core 54 inside the console air conditioning case 50. An air mix door 56 is disposed between the evaporator 53 and the heater core 54.

  In the most downstream part of the air passage of the console air conditioning case 50, there are a seat opening 57 for blowing conditioned air from the vehicle seat 6, and a console opening 58 for blowing conditioned air from the console 4 toward the upper body of the occupant. Two types of openings are provided.

  A seat opening opening / closing door 59 and a side opening opening / closing door 60 are rotatably arranged upstream of the openings 57, 58, respectively, and these doors 59, 60 are connected via a link mechanism (not shown). Opening and closing operations are performed by a common servo motor 61.

  The seat opening 57 is connected to the seat outlet 45 via a seat duct (not shown). The console opening 58 is connected to the console outlet 44 via a console duct (not shown).

  Next, the outline of the electric control unit of the present embodiment will be described. The air conditioning control device 100 (ECU) includes a known microcomputer including a CPU, a ROM, a RAM, and the like, and its peripheral circuits. The air conditioning control device 100 stores an air conditioning device control program in its ROM, and performs various calculations and processes based on the air conditioning device control program. This air-conditioning control device 100 corresponds to the air-conditioning air blowing control means in the present invention.

  Sensor detection signals are input from the sensor groups 70 to 75 to the input side of the air conditioning control device 100, and various air conditioning operation switches 77 to 81 provided on the air conditioning operation panel 76 disposed in the vicinity of the instrument panel 3 in the front of the passenger compartment. An operation signal is input from.

  Connected to the output side of the air-conditioning control apparatus 100 are the electric motors 25b and 52b of the blowers 25 and 52, and the servo motors 24a, 29a, 56a, 38, 47, 61 and the like that constitute electric drive means of each device. Is controlled by an output signal of the air conditioning control device 100.

  As a sensor group, an outside air sensor 70 that detects the outside air temperature TAM, an inside air sensor 71 that detects the inside air temperature TR, a solar radiation sensor 72 that detects the amount of solar radiation TS that enters the vehicle interior, and a seat temperature that detects the seat surface temperature of the seat 6. A sensor 73, a seating sensor 74 that individually determines whether or not an occupant is seated on the seat 6, and an IR sensor 75 that is a non-contact sensor that detects the surface temperature of the occupant in a non-contact manner are provided.

  The seating sensor 74 is a well-known sensor for individually determining whether or not an occupant is seated on the seat 6. For example, as the seating sensor 74, a normally open switch that is embedded in a seat cushion (sitting portion) that constitutes a passenger seat and closes (that is, turns on) when a load is applied to the seat cushion from above is used. . The seat cushion is a member that supports the waist when an occupant is seated. The seating sensor 74 corresponds to the occupant detection means in the present invention.

  The IR sensor 75 has a large number of infrared detection elements arranged in a matrix and detects the temperature distribution of a predetermined detection target region set in the vehicle interior. The IR sensor 75 is arranged in the vicinity of a room mirror located above the vehicle front window glass in the vehicle interior.

  Here, the detection target area of the IR sensor 75 in the present embodiment is set on the occupant surface such as the occupant's face, waist, and chest. The IR sensor 75 corresponds to the temperature detection means of the present invention.

  The air-conditioning operation panel 76 has various air-conditioning operation switches, such as a blow-out mode switch 77 for manually setting the blow-out mode switched by the blow-out mode doors 34 to 37, 59, 60, an air-conditioner switch 78 for outputting an operation command signal for the indoor air-conditioning unit 1, and a blower A blower operation switch 79 for manually setting the air volume of 25, an auto switch 80 for issuing a command signal for the air conditioning automatic control state, a temperature setting switch 81 for forming a temperature setting means for setting the passenger compartment temperature, and the like are provided.

  In the above configuration, the operation of the vehicle air conditioner of the present embodiment will be described with reference to FIGS. FIG. 5 shows a flowchart of cool-down control of the vehicle air conditioner. Here, it is assumed that one occupant is in the driver's seat in the passenger compartment under a midsummer environment. It is assumed that the air conditioner switch 78 of the vehicle air conditioner is turned on.

  When an occupant gets into the vehicle, first, the number of occupants and the seating position of the occupants are detected by a seating sensor 74 provided on each seat 6 in S1.

  Next, it is determined whether or not the number of passengers detected by the seating sensor 74 in S2 is one and the seating position of the passenger is the driver's seat. When it is determined by the determination that the occupant is seated only in the driver's seat, the process proceeds to S4. If the occupant is seated in a place other than the driver's seat, the process proceeds to S3, and normal air-conditioning control for air-conditioning the entire vehicle interior is performed by the indoor air-conditioning unit 1.

  In S2, when the occupant is seated only in the driver's seat, only the indoor air conditioning unit 1 on the side where the occupant is detected is operated in S4. In the present embodiment, since there are passengers only in the driver's seat, the operation of the fan and the like of the vehicle right-side air conditioning unit 10 is started, and the operation of the fan and the like of the vehicle left-side air conditioning unit 11 is not started.

  In this way, the air conditioning efficiency of the vehicle air conditioner is improved by operating only the fan of the indoor air conditioning unit 1 on the side where the occupant is detected and blowing out the conditioned air only from the blowing portion on the side where the occupant is detected. Can be made.

  Next, the surface temperature of the driver's seat occupant is detected by the IR sensor 75 arranged in the vicinity of the room mirror in S5.

  Next, it is determined whether or not the surface temperature of the driver's seat occupant detected by the IR sensor 75 in S6 is equal to or higher than a first predetermined temperature. If the passenger's surface temperature is equal to or higher than the first predetermined temperature, it is determined that the cool-down control is necessary, and the process proceeds to S7 to perform the cool-down control.

Here, the cool-down control in the present embodiment will be described with reference to FIG. FIG. 6 shows a human skin cold spot distribution (a distribution of sensory points that feel cold). In FIG. 6, the vertical axis represents the human body part, and the horizontal axis represents the number of skin cold spots per cm ² .

  The greater the number of skin cold spots, the greater the degree to which humans feel cold. According to the skin cold spot distribution shown in FIG. 6, the face area feels the coldest, then the abdomen and waist, then the chest and back. Next, humans feel less cold in order of upper arms and hands.

  Moreover, FIG. 7 has shown the heat exchange property about each site | part of a body. FIG. 7A shows the skin blood flow change rate corresponding to each part of the body, FIG. 7B shows the amount of perspiration corresponding to each part of the body, and FIG. 7C shows the heat transfer corresponding to each part of the body. Shows the rate.

  Here, in FIG. 7A, the vertical axis represents the human body part, and the horizontal axis represents the ratio when the part having the highest blood flow change rate is 1. In FIG. 7 (b), the vertical axis represents the part of the human body, and the horizontal axis represents the ratio when the part having the highest unit area perspiration is 1. In FIG.7 (c), the vertical axis | shaft represents the site | part of the human body, and the horizontal axis represents the heat transfer coefficient. Note that a region where at least one of blood flow change, sweating rate, and heat transfer rate is high can be said to be a region that is easily cooled by outside air or the like because the amount of heat released from the body is large.

  According to the heat exchange properties for each part of the body shown in FIGS. 7 (a) to (c), the skin blood flow change has a high rate of change in the hands and feet, and the amount of sweat is high in the face, waist, etc. Heat transfer rate is high in arms, hands, lower legs and legs.

  In consideration of the above-mentioned human skin cold spot distribution (FIG. 6) and heat exchange (FIG. 7), in the cool-down control in this embodiment, first, the cold spot density of the skin cold spot distribution is the highest, and the amount of sweating. The air is preferentially blown out and cooled toward the face portion that is exposed to the outside air and that the occupant most wants to cool (see FIG. 8A). FIGS. 8A to 8D show the blown-out state of the conditioned air during the cool-down control for the driver's seat occupant.

  Here, the conditioned air blown out toward the face part is blown out only from the right center blowing part 40a and the right side blowing part 41a of the face blowing parts 40 and 41, and from the left center blowing part 40b and the left side blowing part 41b. Does not blow wind.

  Next, when the surface temperature of the occupant's face detected by the IR sensor 75 in S8 is equal to or lower than the second predetermined temperature, as shown in FIG. 7B, the contact portion with the occupant (near the waist) Air conditioned air (cold air) is blown out from the seat 6 with the heat receiving area of the passenger next to the air side. The second predetermined temperature is a temperature determined by experiments or the like, and is set to a temperature higher than the first predetermined temperature.

  In the vicinity of the occupant's waist, next to the face portion, the cold spot density of the skin cold spot distribution is high, the amount of perspiration is large, and the contact portion with the sheet 6 having a large heat mass is preferentially cooled next to the face portion. . Here, in addition to the vehicle right-side air conditioning unit 10 that is operated to blow air-conditioned air near the face, the console air-conditioning unit 2 is operated to blow air-conditioned air from the seat blowing portion 45.

  Therefore, in S8, the conditioned air is blown out from the face blowing portions 40a and 41a toward the vicinity of the occupant's face, and the conditioned air is blown out from the seat blowing portion 45 toward the occupant's waist and back. The conditioned air of the console air conditioning unit 2 is blown out only from the seat blowing portion 45 of the driver's seat side seat.

  Next, in S9, when the seat surface temperature detected by the seat temperature sensor 73 reaches the seat comfortable surface temperature, as shown in FIG. 8 (c), by the wind direction control device provided in the face blowing portions 40 and 41, In addition to the occupant's face, air-conditioning air is blown out near the occupant's hand to cool it.

  The human hand has a high rate of change in skin blood flow, a high heat transfer rate, and is a part that the occupant wants to cool down next to the face, waist, etc., so it cools down next to the waist, etc.

  In addition, as the rate of change in skin blood flow shows, the hand is a peripheral part that dissipates the deep body temperature by circulating blood, and the deep body temperature can be dissipated by cooling the hand, The deep body temperature may be difficult to lower than the temperature, and cooling is given priority over the face, waist, etc., which lower the body surface temperature.

  In this way, in consideration of human skin cold spot distribution and heat exchange, first, the face part of the occupant is concentrated and cooled, then the contact part between the occupant and the seat 6 is cooled in addition to the face part, Next, the immediate effect of the air conditioning in the passenger compartment can be improved by cooling the passenger's hand.

  Here, the blowing of the conditioned air to the vicinity of the occupant's hand in the present embodiment may be blown out from either one of the right center face blowing portion 40a of the face blowing portions 40, 41 or the right side face blowing portion 41a. it can. In addition, the change of the blowing direction of the conditioned air to the vicinity of a specific passenger's hand can be performed by directing the wind direction adjusting grill 46 to the vicinity of the hand.

  The occupant's hand is detected by the temperature distribution detected by the IR sensor 75. For example, if the occupant detected by the seating sensor 74 is a driver, the conditioned air is blown mainly toward the vicinity of the steering of the vehicle.

  Next, when the surface temperature of the occupant detected by the IR sensor 75 in S10 is equal to or lower than the third predetermined temperature, the air flow rate ratio of the air blowing portions 40 and 41 and the seat blowing portion 45 is gradually reduced. As shown in FIG. 7 (d), conditioned air (cold air) is blown out from the blowout portion on the side where the occupant is detected in the door blowout portion 43 and the console blowout portion 44 toward the chest and arms of the occupant. The third predetermined temperature is a temperature determined by experiments or the like, and is set to a temperature higher than the first predetermined temperature and lower than the second predetermined temperature.

  Here, the chest and arms near the occupant are parts with high heat exchange, and when the occupant's face, the vicinity of the hand, and the part in contact with the seat 6 are cooled and approach a stable state in terms of heat, It is a site where disturbances are annoying.

  Therefore, the passenger's chest and arms are cooled after the passenger's hand is cooled. In addition, a passenger | crew's comfort can be improved by blowing off the air-conditioning wind from the door blowing part 43 and the console blowing part 44 so that it may also hit a thigh part with comparatively high skin cold spot distribution.

  Next, when the passenger's surface temperature detected by the IR sensor 75 in S11 becomes equal to or lower than the first predetermined temperature, the cool-down control is terminated. Thereafter, conditioned air is blown out from the face blowing portions 40a and 41a.

  Here, control is performed to blow out the conditioned air so that the wind direction adjusting grill 46 provided in the face blowing portions 40a and 41a is shaken toward the occupant. This is because when the vicinity of the occupant is cooled and approaches a stable state in terms of thermal feeling, it starts to feel troublesome that the blown air-conditioning air directly hits the occupant's body.

  Specifically, the vertical louver 48 of the wind direction adjusting grille 46 is swung left and right in the direction of arrow A in FIG. 9, or the horizontal louver 49 is swung up and down in the direction of arrow B, thereby cooling the air-conditioned wind. Blow out near the target part (part to be blown out). For example, air-conditioning air is swung up and down from the vicinity of the passenger's face to the neck.

  Thereby, the annoyance of a passenger | crew and draft feeling (excessive cooling with respect to a local part) which generate | occur | produce when an air-conditioning wind concentrates and blows off to a cooling object part (part | part used as blowing object) can be suppressed.

  In S6, if the surface temperature of the occupant detected by the IR sensor 75 is lower than the first predetermined temperature, it is determined that the cool-down control is unnecessary, and only the occupant seated in the driver's seat is in S11. Perform processing.

  Thereafter, the operation of the fan and the like of the air conditioning control device is stopped by turning off the air conditioner switch 78 of the vehicle air conditioning device.

  Moreover, the above-described cool-down control is set to the inside air circulation mode in which the vehicle interior air is introduced from the inside air introduction port 22 of the inside / outside air switching box 21, for example, from the face blowing portions 40 a and 41 a as shown in FIG. 10. The conditioned air blown toward the occupant can be sucked in at the suction port provided at the occupant's feet. According to this, it can be made to circulate as a center of a passenger | crew, and the air-conditioning performance of a vehicle air conditioner can be improved by capacity saving.

  As described above, the timing of blowing the conditioned air to the occupant in the present embodiment is as follows. First, the conditioned air from the vehicle right side air conditioning unit 10 is blown out from the face openings 40 and 41 to the vicinity of the occupant's face (air side). Then, secondly, in addition to the blowing of conditioned air to the vicinity of the face, conditioned air from the console air conditioning unit 2 is blown from the seat 6.

  Further, when the seat temperature sensor 73 detects that the contact portion of the seat 6 with the occupant is stabilized in terms of thermal sense, thirdly, the conditioned air to the occupant in the vicinity of the occupant's face and the occupant-seat 6 contact portion. In addition, the conditioned air from the right center face outlet 40a or the right side face outlet 41a of the face outlet 40 is blown out in the vicinity of the passenger's hand. Furthermore, fourthly, air-conditioning air (cold air) is blown out from the door 5 and the console 4 for the passenger's door side and the like which are uncomfortable due to heat load such as solar radiation.

  In this way, the timing of blowing air-conditioned air to the occupant is determined in consideration of the human skin cold spot distribution and heat exchange, thereby improving the immediate effect of the air-conditioning in the vehicle interior, thereby reducing the vehicle air-conditioning capacity. The air conditioning performance of the apparatus can be improved.

  Furthermore, when there is only one passenger in the vehicle, it is possible to improve the air conditioning performance of the vehicle air conditioner with reduced capacity by blowing the conditioned air around the passenger and concentrating the air conditioning capability. .

  Furthermore, by operating only the air conditioning units 10 and 11 on the side where the occupant is detected in the indoor air conditioning unit 1, the air conditioning performance of the vehicle air conditioner can be improved with reduced capacity.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, only parts different from the first embodiment will be described. FIG. 11 shows a schematic configuration diagram of the indoor air conditioning unit 1 according to the present embodiment.

  In the indoor air conditioning unit 1 in the first embodiment, the interior of the air conditioning case 20 is partitioned into a vehicle right side passage 13 and a vehicle left side passage 14 by a central partition plate 12, but the indoor air conditioning unit 1 in the second embodiment is A left / right switching door 39 is provided in the air conditioning case 20 on the downstream side of the heater core 27 instead of the central partition plate 12.

  The left / right switching door 39 is rotatably arranged in the air conditioning case 20 and is driven by a servo motor (not shown) so that its rotational position (opening) can be adjusted. The left / right switching door 39 can fully close one of the left and right openings of the face opening 30, the foot opening 31, the defroster opening 32, and the door opening 33 branched to the left and right. When special control such as cool-down control is not performed, the left / right switching door 39 is adjusted to its rotational position by adjusting its rotational position (the broken line portion of the left / right switching door 39 in FIG. 11). (State), the vehicle right side passage 13 (driver's seat side passage) and the vehicle left side passage 14 (passenger seat side passage) can be partitioned.

  Further, the indoor air conditioning unit 1 in the first embodiment includes the evaporator 26 and the heater core 27 independently in each of the vehicle right side air conditioning unit 10 and the vehicle left side air conditioning unit 11, but in this embodiment, the evaporator 26, The heater core 27 is shared.

  In the above configuration, instead of the process of operating only the indoor air conditioning unit 1 on the side where the occupant is detected in S4 of FIG. 5 performed in the first embodiment, the left and right switching doors are fully opened on the side on which the occupant is boarded, Processing to fully close the side where the passenger is not on board.

  Thereby, the maximum air_conditioning | cooling capability of the indoor air conditioning unit 1 can be improved, and the immediate effect of a vehicle air conditioner can be improved compared with the structure of 1st Embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the third embodiment, only portions different from the first embodiment will be described.

  In this embodiment, in the cool-down control, the conditioned air is blown out to the occupant. First, the conditioned air conditioned by the vehicle right-side air conditioning unit 10 is concentrated and blown out from the face blowing portions 40a and 41a to the vicinity of the occupant's face. (S7 in FIG. 5).

  Secondly, when the surface temperature in the vicinity of the occupant's face detected by the IR sensor 75 is equal to or lower than the second predetermined temperature, the operation of the vehicle right air conditioning unit 10 is stopped, the console air conditioning unit 2 is operated, and the console air conditioning is performed. The conditioned air conditioned by the unit 2 is blown out only from the seat blowing portion 45 toward the occupant's waist and back (S8 in FIG. 5).

  Third, when the seat surface temperature detected by the seat temperature sensor 73 reaches the comfortable seat surface temperature, the operation of the console air conditioning unit 2 is stopped, the vehicle right air conditioning unit 10 is activated, and the vehicle right air conditioning unit 10 is air-conditioned. The conditioned air is blown only near the passenger's hand (S9 in FIG. 5).

  And fourthly, the console air conditioning unit 2 may be operated so that the conditioned air is blown from each blowing portion to a predetermined part (S10 in FIG. 5).

  As described above, the timing of blowing the conditioned air to the occupant is other than the air conditioning unit corresponding to the cooling target part in the order of the occupant's face, the contact portion between the occupant and the seat 6 (occupant's waist / back), and the occupant's hand. By stopping the operation of the air conditioning unit, the air conditioning capability can be concentrated only on the part to be cooled (local part), and the air conditioning performance of the vehicle air conditioner can be improved with reduced capacity.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows.

  (1) In each of the above embodiments, whether or not the cool-down control is necessary is determined based on the relationship between the surface temperature of the occupant detected by the IR sensor 75 and the predetermined temperature (S5). The air conditioner control device 100 calculates the temperature difference ΔT between the inside air temperature TR detected by the inside air sensor 71 and the set temperature set by the temperature setting switch 81 or the temperature difference ΔT between the inside air temperature TR and the target outlet temperature TAO. May be determined by the relationship between the temperature difference ΔT and a predetermined temperature difference.

  In this case, if the temperature difference ΔT is equal to or greater than the predetermined temperature difference, the air conditioning control device 100 determines that the cool-down control is necessary. If the temperature difference ΔT is smaller than the predetermined temperature difference, the cool-down control is not necessary. It is judged that.

  (2) In the above embodiments, in the cool-down control, the conditioned air to the vicinity of the occupant's hand is blown out from the face blowing portions 40 and 41. However, the present invention is not limited to this and can be variously modified. It is. For example, as shown in FIG. 12, a hand blowing part 82 for blowing out near the passenger's hand may be provided, and the conditioned air may be blown from the hand blowing part 82 to the passenger's hand. In addition, by configuring the steering for steering the vehicle so that the conditioned air can be blown out from the steering, the conditioned air may be blown out from the steering portion to the occupant's hand. In addition, the blowing of conditioned air to other parts to be cooled (faces, waists, and the like that are parts to be blown out) is not limited to the description in each of the above embodiments.

  (3) In each of the above embodiments, the console air conditioning unit 2 is provided in order to blow out the conditioned air from the seat 6 and the console 4, but the console air conditioning unit 2 is not provided, and the indoor air conditioning unit 1 is connected via a duct. The conditioned air may be supplied to the seat 6 and the console 4.

  (4) In each of the above embodiments, the cool-down control is performed only when there is one passenger in the vehicle interior by the seating sensor 74. However, the present invention is not limited to this, and the boarding is performed when the number of passengers is equal to or less than a predetermined number. Cool down control may be performed for the occupant. For example, when passengers are seated only in the driver's seat and the passenger seat, the vehicle right side unit 10 of the indoor air conditioning unit 1, the vehicle left side unit 11, the fan of the console air conditioning unit 2, etc. are operated to Cool-down control can be implemented mainly by passengers.

  (5) In each of the above embodiments, whether or not an occupant is seated on the seat 6 is determined by the seating sensor 74. However, the present invention is not limited to this, and the temperature distribution in the vehicle interior is detected by the IR sensor 75, and the number of occupants Further, it may be determined whether or not an occupant is seated on the seat 6 by detecting the seating position of the occupant.

  (6) Further, in the cool-down control in each of the above embodiments, the conditioned air is blown out in a concentrated manner on the occupant's cooling target part (part to be blown out), so that each cooling target part falls to a predetermined reference temperature. Alternatively, the air-conditioning wind may be blown out by the wind direction adjusting grill 46 (see FIG. 9). Thereby, the passenger | crew's annoyance and draft feeling (excessive cooling) which generate | occur | produce when an air-conditioning wind concentrates and blows off to a cooling object part by this can be suppressed.

  (7) In the third embodiment, the conditioned air is blown out to the occupant in the order of the occupant's face, the contact portion between the occupant and the seat 6 (occupant's waist / back), and the occupant's hand. The operation of the air conditioning unit other than the air conditioning unit corresponding to the target part is stopped, but the present invention is not limited to this, and various modifications can be made. If the timing of blowing the conditioned air to the occupant is performed in the order of the occupant's face, the contact portion between the occupant and the seat 6 (occupant's waist / back), and the occupant's hand, for example, it is provided at the front of the passenger compartment. The operating state of the indoor air conditioning unit 1 may be continued, and only the console air conditioning unit 2 may be switched to the activated / deactivated state. This also makes it possible to improve the air conditioning performance of the vehicle air conditioner with reduced capacity.

It is a principal part side view of the vehicle which has a vehicle air conditioner which concerns on 1st Embodiment of this invention. It is the schematic of the wind direction adjustment grill which concerns on 1st Embodiment of this invention. It is a schematic sectional drawing which shows the air path structure of the left-right independent control in the indoor air conditioning unit which concerns on 1st Embodiment of this invention. It is typical sectional drawing of the vehicle right side air-conditioning unit of the vehicle air conditioner which concerns on 1st Embodiment of this invention. It is a flowchart which shows the cool down control of the vehicle air conditioner which concerns on 1st Embodiment of this invention. It is a characteristic view which shows human skin cold spot distribution. It is a characteristic view which shows the heat exchange property of a human body. It is a figure which shows the blowing state of the air-conditioning wind at the time of the cool down control which concerns on 1st Embodiment of this invention. It is operation | movement explanatory drawing explaining the action | operation of the wind direction adjustment grill which concerns on 1st Embodiment of this invention. It is a figure which shows the blowing of air-conditioning wind at the time of cool-down control which concerns on 1st Embodiment of this invention, and a suction state. It is a schematic sectional drawing which shows the air path structure of the left-right independent control in the indoor air conditioning unit which concerns on 2nd Embodiment of this invention. It is a principal part side view of the vehicle which added the hand blowing part as a blowing part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Indoor air conditioning unit, 2 ... Console air conditioning unit, 4 ... Console, 5 ... Door for getting on / off, 6 ... Seat, 10 ... Vehicle right side air conditioning unit, 11 ... Vehicle left side air conditioning unit, 39 ... Left / right switching door, 40 ... Center face Blowing unit, 41 ... side face blowing unit, 43 ... door blowing unit, 44 ... console blowing unit, 45 ... seat blowing unit, 46 ... wind direction adjusting grill, 74 ... seat sensor, 75 ... IR sensor, 100 ... air conditioning control device.

Claims (11)

An air conditioning unit (1, 2) for adjusting the temperature of the conditioned air blown into the passenger compartment;
Blowing out the conditioned air temperature-controlled by the air conditioning unit (1, 2) toward the blowing target including at least the vicinity of the passenger in the passenger compartment, the contact portion between the passenger and the seat (6), and the vicinity of the passenger's hand. Possible blowout part,
Air-conditioning air blowing control means (100) for controlling the air-conditioning air blown out from the blowing unit,
The conditioned air blowing control means (100) blows conditioned air near the occupant's face, then blows conditioned air near the contact portion between the occupant and the seat (6), and then conditioned air near the occupant's hand. A vehicle air conditioner that performs cool-down control to blow out the air.   In the cool-down control, the air-conditioning air blowing control means (100) first blows air-conditioning air near the occupant's face and then toward the contact portion between the occupant and the seat (6) in addition to the vicinity of the occupant's face. The conditioned air is blown out, and then the conditioned air is blown out toward the vicinity of the passenger's hand in addition to the vicinity of the passenger's face and the contact portion between the passenger and the seat (6). Vehicle air conditioner.   In the cool-down control, the conditioned air blowing control means (100) blows conditioned air only near the passenger's face, and then blows conditioned air only near the contact portion between the passenger and the seat (6). The vehicle air conditioner according to claim 1, wherein the air-conditioning air is blown out only in the vicinity of a passenger's hand. The blowing target includes the vicinity of the occupant's chest or arm,
In the cool-down control, the air-conditioned air blowing control means (100) blows air-conditioned air toward at least one of the passenger's chest and arms after blowing the air-conditioned air near the passenger's hand. The vehicle air conditioner according to any one of claims 1 to 3. The blowout part is configured to include a face blowout part (40, 41) that blows out air-conditioned air toward the upper body of the occupant.
5. The vehicle according to claim 1, wherein the conditioned air blowing control means (100) blows conditioned air from the face blowing part (40, 41) to the vicinity of a passenger's hand. 6. Air conditioner. A wind direction adjusting means (46) provided in the blowing section for adjusting the blowing direction of the conditioned air;
A temperature detecting means capable of detecting a surface temperature of at least a part to be blown out of the body of an occupant;
When the surface temperature of the part to be blown out detected by the temperature detecting unit becomes equal to or lower than a predetermined temperature, the conditioned air blowing control unit (100) blows out the conditioned air from the wind direction adjusting unit (47). The vehicle air conditioner according to any one of claims 1 to 5, wherein a direction is swung between a part direction to be blown out and a vicinity of the part to be blown out. It is provided in the vicinity of the passenger in the passenger compartment, and has a suction port for sucking in the conditioned air blown out from the blowing portion.
The air blowing control means (100) performs control to blow out the conditioned air from the blowing section, and sucks the blown out conditioned air from the suction port. The vehicle air conditioner described in 1. Occupant detection means (74) for detecting the occupant's boarding state,
The vehicle according to any one of claims 1 to 7, wherein the air-conditioning air blowing control means (100) performs the cool-down control on an occupant detected by the occupant detection means (74). Air conditioner.   The air-conditioning wind blowing control means (100) performs the cool-down control only on the driver's seat when the passenger detected by the passenger detection means (74) is only on the driver's seat, thereby The vehicle air conditioner according to claim 8, wherein the air conditioning capability is concentrated on a passenger boarding the vehicle. The air conditioning unit (1) includes a right air conditioning unit (10) that air-conditions the right space in the vehicle interior, and a left air conditioning unit (11) that air-conditions the left space in the vehicle interior,
When the occupant detection means (74) detects an occupant only in the right space or the left space, the occupant detection means (74) is activated by operating only the air conditioning unit (1) on the side where the occupant is detected. The vehicle air conditioner according to claim 8, wherein the air conditioning capability is concentrated on the passenger detected by the vehicle.   When the occupant detection unit (74) detects the occupant only in the right space or the left side space of the vehicle interior, the air-conditioning wind blowing control unit (100) only detects the blast portion corresponding to the space on the side where the occupant is detected. The vehicle air conditioner according to any one of claims 8 to 10, wherein the air conditioning capacity is concentrated on an occupant detected by the occupant detection means (74) by blowing out the conditioned air from the vehicle.

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