JP2008081038A - Air conditioner for convertible - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a convertible, easing the sense of getting hot flashes caused by direct sunlight on thighs in hot days when a roof of a vehicle is opened, without any additional opening part. <P>SOLUTION: An air-conditioning control device 2 has a blowing mode selection means S230 selecting one of a plurality of blowing modes based on a thermal load of a vehicle. In the blowing mode selection means S230, a first changeover point X1 where the blowing mode is changed from a face blowing mode to a bi-level blowing mode in the process of transition from a high cooling load area to a low cooling load area, is set. The first changeover point X1 is shifted to a position of a large cooling load in the open time when the roof is opened, compared with in the closing time when the roof is closed. Thus, the air-conditioner ease the sense of getting hot flashes caused by direct sunlight on the thighs in hot days. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner for an open car that can open and close a roof of a vehicle.

  Conventionally, as an air conditioner for this type of open car, for example, the one shown in Patent Document 1 is known. In other words, the air conditioning unit of the air conditioner is provided with a face opening connected to a face outlet that blows conditioned air toward the upper body of the passenger in the passenger compartment, and air conditioned air toward the feet of the passenger in the passenger compartment. A foot opening connected to the foot outlet for blowing out is provided.

  And the additional opening part connected to the additional blower outlet which blows off air-conditioning air toward a passenger | crew's knee and waist vicinity is provided between the face opening part and the foot opening part. In this additional opening, a communication hole is formed upstream of the face opening and the foot opening, and a switching door is provided in the communication hole. And it is comprised so that either one of a face opening part or a foot opening part and an additional blower outlet may be connected selectively by a switching door.

  As a result, when low-temperature conditioned air is blown from the face outlet when the roof is opened in a warm period, the same low-temperature conditioned air is added to the face opening by switching the switching door to the face opening side. Blowing out more can eliminate hot flashes around the thigh.

Also, when the roof is opened in cold weather, if high-temperature conditioned air is blown from the foot outlet, the same high-temperature conditioned air can be added to the foot opening by switching the switching door to the foot opening side. Blow out more and secure a feeling of heating around the waist.
Japanese Patent Laid-Open No. 2004-203191

  However, according to Patent Document 1, additional parts such as a communication hole, a switching door, and an actuator for operating the switching door are required by providing an additional opening in the air conditioning unit. Furthermore, there is a problem that an installation space for arranging these additional air outlets, additional openings, communication holes, switching doors, and the like becomes large, and the air conditioning unit cannot be mounted in the vehicle interior, and the manufacturing cost of the air conditioning unit increases.

  Accordingly, a first object of the present invention is to provide an air conditioner for an open car that can reduce the feeling of cold air due to the influence of wind flowing into the passenger compartment in cold weather without providing an additional opening when the roof of the vehicle is opened. Is to provide.

  Further, the first object of the present invention is to provide an air conditioner for an open car that can eliminate the feeling of hot flashes due to direct sunlight near the thigh in a warm period without providing an additional opening when the roof of the vehicle is opened. To provide an apparatus.

  In order to achieve the above object, the technical means described in claims 1 to 7 are employed. That is, according to the first aspect of the present invention, there is provided an air conditioner installed in an open car that can open and close the roof of the vehicle, and the air conditioning unit that blows out the temperature-conditioned air toward the air outlet provided in the vehicle interior. (1), an air conditioning control means (2) for controlling the air conditioning unit (1) according to the heat load in the passenger compartment, and the air conditioning control means (2). A blow mode selection means (S230) for selecting one blow mode based on the load, and the blow mode selection means (S230) includes a face blow mode during the process of moving from a region where the cooling load is high to a low region. The first switching point (X1) for switching to the bi-level blowing mode is set, and this first switching point (X1) is more open when the roof is opened than when the roof is closed. It is characterized in that offset towards the tuft loading large.

  According to the present invention, there is a feeling of hot flashes due to direct sunlight near the thigh of the occupant when the vehicle is open during a warm period. Therefore, at the time of opening, the target blowing temperature (TAO) is reduced, for example, so that the cooling load is increased at the first switching point (X1) of the blowing mode, and the blowing mode is set earlier than the closing mode in the face blowing mode. By switching from to the bi-level air outlet mode, low temperature conditioned air can be blown out from both the face air outlet and the foot air outlet.

  Thus, heat can be avoided by blowing low-temperature conditioned air from the feet toward the upper body including the vicinity of the thigh of the occupant. Therefore, it is possible to eliminate the hot feeling caused by the direct sunlight of the occupant without providing an additional opening in the air conditioning unit (1).

According to the second aspect of the present invention, there is provided an air conditioner equipped in an open car capable of opening and closing a roof of a vehicle, wherein the air conditioning unit blows out conditioned air whose temperature is adjusted toward an outlet provided in the passenger compartment. ), Air conditioning control means (2) for controlling the air conditioning unit (1) in accordance with the thermal load in the passenger compartment, and the air conditioning control means (2). A blowing mode selection means (S230) for selecting one blowing mode based on
In this blowing mode selection means (S230), a second switching point (X2) for switching from the bi-level blowing mode to the foot blowing mode is set during the process of moving from a low heating area to a high heating area. The point (X2) is characterized in that the opening time when the roof is opened is shifted toward the larger heating load than when the roof is closed.

  According to the present invention, there is a feeling of cold wind that cools the vicinity of the waist due to the influence of the wind flowing into the passenger compartment when the vehicle is open during a cold period. Therefore, at the time of opening, for example, the target blowing temperature (TAO) is increased so that the heating load is increased at the second switching point (X2) of the blowing mode, so that the blowing mode is earlier than the closing mode. The high-temperature conditioned air can be blown out from both the face blowout port and the foot blowout port by switching from to the bi-level blowout mode.

  Thereby, cold air can be avoided by blowing high-temperature conditioned air from the feet toward the upper body including the vicinity of the occupant's waist. Therefore, it is possible to reduce the feeling of cold wind due to the influence of the wind flowing into the passenger compartment without providing an additional opening in the air conditioning unit (1).

  In the invention according to claim 3, the air conditioning unit (1) includes a face opening (9) connected to a face outlet for blowing conditioned air toward the upper body of the passenger in the passenger compartment, and the feet of the passenger in the passenger compartment. And a foot opening (10) connected to a foot outlet for blowing out conditioned air toward the air-conditioning control means (2). In the air-conditioning control means (2), the air-out mode when the roof is opened is the air-out mode selection means (S230). In the selected bi-level blowing mode, control is performed so that the air volume on the face opening (9) side is larger than the air volume on the foot opening (10) side than in the bi-level blowing mode when the roof is closed. It is characterized by being.

  According to the present invention, at the time of opening in a warm period, comfort can be improved by blowing conditioned air having a large air volume and a lower temperature to the upper body than the feet. In addition to the face opening (9) and foot opening (10), the air conditioning unit (1) has an additional opening connected to an additional air outlet that blows out air-conditioned air toward the passenger's knee and waist. Therefore, the additional opening and the additional part for controlling the opening and closing of the additional opening are not necessary, so that the part cost can be reduced.

  In the invention according to claim 4, the air conditioning unit (1) includes a face opening (9) connected to a face outlet for blowing conditioned air toward the upper body of the passenger in the passenger compartment, and the feet of the passenger in the passenger compartment. And a foot opening (10) connected to a foot outlet for blowing out conditioned air toward the air-conditioning control means (2). In the air-conditioning control means (2), the air-out mode when the roof is opened is the air-out mode selection means (S230). In the selected bi-level blowing mode, control is performed so that the air volume on the foot opening (10) side is larger than the air volume on the face opening (9) side than the bi-level blowing mode when the roof is closed. It is characterized by being.

  According to the present invention, the comfort can be improved by blowing conditioned air with a large air volume and a higher temperature at the foot than the upper body when opening in a cold season.

  In the invention according to claim 5, the air conditioning unit (1) includes a face opening (9) connected to a face outlet that blows out conditioned air toward the upper body of the passenger in the passenger compartment, and the feet of the passenger in the passenger compartment. And a foot opening (10) connected to a foot outlet for blowing out conditioned air toward the air-conditioning control means (2). In the air-conditioning control means (2), the air-out mode when the roof is opened is the air-out mode selection means (S230). In the selected bi-level blowing mode, the conditioned air blown from the face opening (9) and the foot opening (10) is controlled to be isothermal.

  According to the present invention, at the time of opening, isothermal conditioned air is blown from both the face blower outlet and the foot blower outlet, so that the upper body can be cooled or heated from the feet of the occupant at the same temperature. Therefore, the comfort can be improved.

In the invention described in claim 6, the air conditioner is provided in an open car capable of opening and closing the roof of the vehicle, and the air conditioning unit (1) blows out the conditioned air whose temperature is adjusted toward the air outlet provided in the passenger compartment. ), Air conditioning control means (2) for controlling the air conditioning unit (1) in accordance with the thermal load in the passenger compartment, and the air conditioning control means (2). A blowing mode selection means (S230) for selecting one blowing mode based on
In this blowing mode selection means (S230), a third switching point (X3) for switching from the foot blowing mode to the foot defroster blowing mode is set during the process of shifting from the low heating area to the high heating area. The point (X3) is characterized in that the opening time when the roof is opened is shifted toward the larger heating load than when the roof is closed.

  According to the present invention, at the time of opening in the cold season, for example, the target blowing temperature (TAO) is increased at the third switching point (X3) of the blowing mode so as to increase the heating load, and the blowing is performed more than at the closing time. By switching the mode from the foot blowing mode to the foot defroster blowing mode early, high-temperature conditioned air can be blown from both the defroster outlet and the foot outlet.

  Thereby, cold air can be avoided by blowing high-temperature conditioned air from the feet toward the upper body including the vicinity of the occupant's waist. Also, since the defroster air outlet is located above the face air outlet, high temperature conditioned air is blown out near the passenger's head under the influence of the wind flowing into the passenger compartment to avoid cooling. Can do.

  According to the seventh aspect of the present invention, the roof detecting means (26) for detecting the open / closed state of the roof is provided, and the blowing mode selecting means (S230) is based on the open / closed state detected by the roof detecting means (26). One of the blowing modes at the time of opening and the blowing mode at the time of closing is selected.

  According to the present invention, the blowing mode is automatically switched according to the open / closed state of the roof and the thermal load in the passenger compartment, and the comfort can be improved by the switched blowing mode.

  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.

(First embodiment)
Hereinafter, an air conditioner for an open car according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing an overall configuration of an air conditioning unit 1 in the present embodiment. FIG. 2 is a block diagram showing electrical wiring of the air conditioning control device 2. FIG. 3 is a flowchart showing a basic routine of air conditioning automatic control of the air conditioning control device 2. FIG. 4 is a flowchart showing a control process of the blowing mode selection means S230 shown in FIG. FIG. 5 is a control characteristic diagram of the blowing mode selection means S230 in the present embodiment.

  The air conditioner of the present embodiment is mounted on an open car that can open and close a roof on the top of the vehicle, and an air conditioning unit 1 that blows out temperature-conditioned air toward an air outlet provided in the vehicle interior. And an air-conditioning control device (hereinafter referred to as ECU) 2 which is an air-conditioning control means for controlling the air-conditioning state in the vehicle interior according to the heat load in the vehicle interior.

  As shown in FIG. 1, the air conditioning unit 1 of the present embodiment has a ventilation system roughly divided into two parts: a blower unit 3 and an air conditioning duct 4. The blower unit 3 is disposed offset from the central part to the passenger seat side in the lower part of the instrument panel in the passenger compartment. On the other hand, the air conditioning duct 4 is arranged 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.

  As is well known, the blower unit 3 is composed of inside / outside air switching means for switching and introducing inside air (vehicle interior air) and outside air (vehicle outside air), and a blowing means for sucking air and blowing air through the inside / outside air switching means. Yes. The inside / outside air switching means includes an inside air introduction port 5, an outside air introduction port 6, and an inside / outside air switching door 7 that selectively switches between both the introduction ports 5 and 6.

  The inside / outside air switching door 7 has an integrally formed rotating shaft rotatably supported by the case, and one end of the rotating shaft protrudes to the outside of the case so that an inside / outside air mode switching mechanism such as an actuator such as a servo motor is provided. 28 (see FIG. 2).

  The blower means includes a blower case 3a having inside / outside air switching means, a centrifugal fan 3b accommodated in the blower case 3a, a fan motor 3c for rotating the centrifugal fan 3b, and driving the fan motor 3c. And a driving circuit 27 for performing The drive circuit 27 controls the voltage applied to the fan motor in accordance with a control signal output from the ECU 2 to be described later to vary the rotation speed (air flow rate).

  The air conditioning duct 4 has a plurality of air outlets 8, 9, and 10 that communicate with air conditioners to be described later and the air outlets in the passenger compartment, and the air blown from the blower unit 3 is sent to the air outlets 8, 9, and 10. The air passage for supplying to is formed.

  The blowout openings 8, 9, and 10 are a defroster opening 8, a face opening 9, and a foot opening 10, and are provided on the downstream side of the air flow in the air conditioning duct 4. The defroster opening 8 is formed to open to the upper side of the air-conditioning duct 4 in the front direction of the vehicle.

  Air-conditioned air whose temperature is controlled by an air mix door 15 described later flows into the defroster opening 8 and is connected to a defroster outlet through a defroster duct (not shown). From the defroster outlet, the inner surface of the vehicle front window glass is connected. Blow out the air-conditioned air.

  The face opening 9 is formed so as to open to the air conditioning duct 4 on the rear side of the vehicle (closer to the passenger) than the defroster opening 8. Air-conditioned air whose temperature is controlled by an air mix door 15 to be described later flows into the face opening 9, and is connected to a face outlet through a face duct (not shown). Blow out the conditioned air.

  The foot openings 10 are formed at both ends of the side wall of the air conditioning duct 4. Air-conditioned air whose temperature is controlled by an air mix door 15 described later flows into the foot opening 10. A foot passage is provided on each of the left and right sides (not shown) on the air downstream side of the foot opening 27, and a front seat foot passage is opened in the middle of the foot passage.

  The conditioned air from the front seat foot passage is blown out to the left and right passenger feet of the front seat through a front seat foot duct (not shown) and a front seat foot outlet. Further, a rear seat foot duct (not shown) and a rear seat foot outlet are connected to the end of the foot passage, and air-conditioned air is blown out to the left and right occupant feet of the rear seat through the rear seat foot outlet. .

  The air conditioner includes an evaporator 13 that is a heat exchanger for cooling, a heater core 14 that is a heat exchanger for heating, an air mix door 15, a defroster door 16 that is an outlet switching door, a face door 17, and these doors 15, It consists of an actuator to be described later for driving 16 and 17 and is housed in the air conditioning duct 4. The air-conditioning duct 4 is made of a resin molded product having a certain degree of elasticity and excellent strength, such as polypropylene.

  The air-conditioning duct 4 is specifically composed of a plurality of divided cases. The plurality of divided cases accommodate the devices such as the heat exchangers 13 and 14 and a door described later, and then a fastening means such as a metal spring clip or a screw. Thus, the air conditioning unit 1 is configured by being integrally coupled.

  In the air conditioning duct 4, an evaporator 13 is disposed immediately after the air inlet. As is well known, the evaporator 13 absorbs the latent heat of evaporation of the refrigerant in the refrigeration cycle from the conditioned air to cool the conditioned air. Specifically, air passing through the evaporator 13 (air blown from the blower unit 3) is cooled by heat exchange with a low-temperature refrigerant flowing through the inside of the evaporator 13. Here, the refrigeration cycle is a known one that includes a compressor, a condenser, a liquid receiver, and an expansion valve (not shown) in addition to the evaporator 13.

  A heater core 14 is arranged at a predetermined interval on the downstream side of the air flow of the evaporator 13. The heater core 14 reheats the cold air that has passed through the evaporator 13, and hot water (engine cooling water) flows through the heater core 14 and heats the air using the hot water as a heat source.

  In the air passage in the air conditioning duct 4, a flat air mix door 15 that adjusts the air volume ratio between the warm air heated by the heater core 14 and the cool air that bypasses the heater core 14 is disposed above the heater core 14. ing. The air mix door 15 serves as a temperature adjusting means for adjusting the temperature of air blown into the passenger compartment by adjusting the air volume ratio.

  Specifically, the air mix door 15 is rotatably provided between a position where the upstream core surface of the heater core 14 is completely closed and a position where the passage bypassing the heater core 14 is fully closed. ing.

  The air mix door 15 is integrally coupled to a rotary shaft arranged in the horizontal direction, and can be rotated in the vehicle vertical direction together with the rotary shaft. The air mix door 15 is rotatably supported by the case, and one end portion of the rotating shaft protrudes outside the case and is coupled to a link mechanism (not shown). The actuator is rotated by an actuator or the like.

  The defroster door 16 is disposed upstream of the defroster opening 8 and opens and closes the defroster opening 8. The face door 17 is disposed upstream of the face opening 9 and opens and closes the face opening 9.

  However, the face door 17 can shut off the air flow to the foot opening 10 by blocking the space between the face opening 9 and the foot opening 10 when the face opening 9 is fully opened. The amount of air blown from the face opening 9 and the amount of air blown from the foot opening 10 can be adjusted according to the door opening of the door 17 itself.

  Each of the defroster door 16 and the face door 17 is integrally coupled to a rotation shaft arranged in the horizontal direction, and can rotate in the vehicle vertical direction together with the rotation shaft. By the way, the defroster door 16 and the face door 17 are control door means for switching the blowing mode, and each rotation shaft is rotatably supported by the case, and one end portion of the rotation shaft protrudes outside the case. These are coupled to a link mechanism (not shown) and are rotationally driven by a blow mode switching mechanism 19 (an actuator such as a servo motor).

  The blowing mode switching mechanism 19 is configured such that when one of the doors 16 and 17 is fully opened, the other door 16 or 17 is fully closed, and when the other door 16 or 17 is fully closed, the other door 16 or 17 is It is designed to be fully opened.

  Next, ECU2 which is an air-conditioning control apparatus is a well-known thing provided with a microcomputer etc., and as shown in FIG. 2, it detects with the operation signal output from the air-conditioner operation panel 20, and each sensors 21-26. A sensor signal is used as input information, A / D converted by an A / D converter, and then input to a microcomputer.

  The microcomputer is a well-known computer having a CPU, a ROM, a RAM, and the like (not shown), and is supplied with power from a battery (not shown) when the ignition switch of the engine is turned on.

  The air conditioner operation panel 20 includes an air conditioner (A / C) switch (not shown), an inside / outside air mode switch, a blower outlet mode switch, a blower air volume switch, an auto switch, an off switch, a liquid crystal display (display), and a temperature setting switch. Etc. are arranged.

  Among these switches, the auto switch is a switch that outputs a command for automatically controlling each air conditioner constituting the air conditioner, and the off switch is a switch that outputs a stop command to the air conditioner. The temperature setting switch is a switch for setting the temperature in the passenger compartment to a desired temperature.

  In addition, the sensors detect an inside air temperature sensor 21 that detects the temperature inside the vehicle, an outside air temperature sensor 22 that detects the outside temperature of the vehicle, a solar radiation sensor 23 that detects the amount of solar radiation, and an air temperature immediately after passing through the evaporator 13. A post-evaporation temperature sensor 24, a water temperature sensor 25 that detects the temperature of engine cooling water, a roof detection sensor 26 that is a roof detection means for detecting the open / close state of the roof of the vehicle, and the like are provided.

  Among these sensors, the inside air temperature sensor 21, the outside air temperature sensor 22, and the solar radiation sensor 23 are sensors for calculating the thermal load (cooling load, heating load) of the vehicle. The drive circuit 27, the inside / outside air mode switching mechanism 28, the blow mode switching mechanism 19 and the temperature control mechanism 30 are controlled by the air conditioning control of the ECU 2.

  Next, the operation of the present embodiment will be described using the flowcharts of FIGS. 3 and 4 based on the control processing procedure of the ECU 2 when the auto switch is turned on, that is, at the time of auto control. First, when the ignition switch is turned on and power is supplied to the ECU 2, the main routine shown in FIG. 2 starts. Then, the contents of the data processing memory (RAM) are initialized.

  In step S210, the inside air temperature Tr detected by the inside air temperature sensor 21, the outside air temperature Tam detected by the outside air temperature sensor 22, the solar radiation amount Ts detected by the solar radiation sensor 23, and the post-evaporator temperature Te detected by the post-evaporation temperature sensor 24. An environmental condition such as a water temperature Tw detected by the water temperature sensor 25 is input, and a set temperature Tset set by a temperature setting switch is read from an output signal from the operation panel.

  In step S220, a target blowout temperature TA0 is calculated. That is, by substituting the detected values Tset, Tr, Tam, and Ts read in step S210 into the formula stored in advance in the ROM, the target blowout temperature TAO of the conditioned air blown into the vehicle interior is calculated.

  Here, the target blowing temperature TAO is a target temperature calculated based on the heat load in the passenger compartment. For example, during cooling, when the cooling load is large, the target blowing temperature TA0 is small, and when the cooling load is small. The target blowing temperature TA0 increases. Further, during heating, when the heating load is large, the target blowing temperature TA0 is large, and when the heating load is small, the target blowing temperature TA0 is small.

  And in step S230 which is a blowing mode selection means, based on the target blowing temperature TAO among several blowing modes, one blowing mode is controlled by the control characteristic diagram of the blowing mode shown in FIG. select. More specifically, as shown in FIG. 4, it is determined in step S231 whether the roof of the vehicle is open.

  Here, the determination is made based on the detection signal of the open / closed state of the roof detected by the roof detection sensor 26. If the roof is open, it is determined that it is open, and the open blowing mode is executed in step S232. If the roof is closed, it is determined that the roof is closed, and a normal blowing mode is executed in step S233.

  In other words, when the vehicle roof is opened and when the vehicle roof is closed, different blowing modes are selected according to the control characteristic diagram of the blowing mode shown in FIG. As shown in FIG. 5, the control characteristic indicated by the solid line is the switching control characteristic for the blowing mode when open, and the control characteristic indicated by the broken line is the switching control characteristic for the blowing mode when closed.

  In any case, the target blowing temperature TAO is set to be in a face blowing mode, a bi-level blowing mode, and a foot blowing mode from a low (low) temperature to a large (high) temperature.

  The face blowing mode is a blowing mode in which conditioned air whose temperature is adjusted is blown out toward the upper body of the occupant from a face blowing opening provided in the vehicle with the face blowing opening 9 opened. The foot blowing mode is a blowing mode in which conditioned air whose temperature has been adjusted from the foot blowing outlet and blown toward the feet of the passenger is opened.

  Further, in the bi-level blowing mode, the conditioned air whose temperature is adjusted from both the face outlet and the foot outlet is blown out toward the upper body and the feet of the occupant by opening the face outlet opening 9 and the foot outlet opening 10. It is a blowing mode.

  Here, the difference between the open time and the closed time is that, in the control characteristics, the first switching point X1 that switches from the face blowing mode to the bi-level blowing mode in the process of moving from the high cooling load region to the low cooling load, and the heating load is low. The second switching point X2 at which the foot blowing mode is switched to the bi-level blowing mode in the process of moving from the region to the high region is different.

  First, the first switching point X1 at the time of opening is set so as to be shifted to a point where the target blowing temperature TAO becomes lower than the first switching point X1 at the time of closing. In other words, the first switching point X1 at the time of opening is set by shifting to a point where the cooling load becomes larger than the first switching point X1 at the time of closing. Thereby, the conditioned air having a lower temperature can be blown out toward the upper body and the feet of the occupant earlier than at the time of closing.

  Therefore, when the warm season is open, the heat load on the passenger increases, for example, there is a feeling of hot flashes due to direct sunlight near the thigh of the passenger, but by switching to the bi-level blowing mode earlier than when closing Low-temperature conditioned air can be blown out toward the passenger from both the face outlet and the foot outlet.

  On the other hand, the second switching point X2 at the time of opening is set so as to be shifted to a point where the target blowing temperature TAO becomes higher than the second switching point X2 at the time of closing. In other words, the second switching point X2 at the time of opening is set by shifting to a point where the heating load becomes larger than the second switching point X2 at the time of closing. Thereby, air-conditioned air having a high temperature can be blown out toward the upper body and feet of the occupant earlier than at the time of closing.

  Therefore, when opening in cold weather, there is a feeling of cold wind that cools the waist due to the effect of the wind flowing into the passenger compartment, but by switching to the bi-level blowing mode earlier than when closing, both the face outlet and the foot outlet High temperature conditioned air can be blown out to the passengers.

  In step S240, air mix control and blower voltage control are executed. In the air mix control, the target opening degree SW of the air mix door 15 is calculated based on Tw and Te read in step S210 and the blowout target temperature TAO calculated in step S220.

  The blower voltage control is to obtain the blower control voltage VF corresponding to the blow target temperature TAO from the blowing characteristics stored in advance in the ROM. Thereby, the ventilation volume according to the blowing target temperature TAO is calculated. Then, in step S250, a control signal is output to the blowing mode switching mechanism 19 based on the control amount that is either the open blowing mode selected in step S230 or the normal blowing mode.

  Further, here, the control amount of the blower voltage VF calculated in step S240 is output to the drive circuit 27, and the control amount that becomes the target opening degree SW of the air mix door 15 calculated in step S240. Based on the above, a control signal is output to the temperature control mechanism 30.

  As a result, the conditioned air adjusted to the blowing target temperature TAO is blown toward the openings 8, 9, and 10, and the air conditioning control according to the blowing mode selected by the blowing mode selection means S230 is automatically performed. In addition, the temperature of the conditioned air blown out from both the face outlet and the foot outlet is substantially isothermal.

  According to the open air conditioner according to the first embodiment described above, the operation of the air conditioning unit 1 can be automatically controlled according to the open / closed state of the roof of the vehicle. That is, it can be automatically performed by the blowing mode selection means S230 having the blowing mode control that is different between when the vehicle roof is opened and when the roof is closed.

  In the blowing mode selection means S230, a first switching point X1 for switching from the face blowing mode to the bi-level blowing mode is set during the process of moving from a high cooling load area to a low cooling area. It is set so that the opening time when the roof is opened is shifted toward the larger cooling load than when the roof is closed.

  According to this, in an open car, there is a feeling of hot flashes due to direct sunlight near the thigh of the occupant due to the opening of the roof when the car is open in a warm period. Therefore, at the time of opening when the roof is opened, for example, the target blowing temperature TAO is decreased so that the cooling load is increased at the first switching point X1 of the blowing mode, and the blowing mode is made earlier than when the roof is closed. In addition, by switching from the face blowing mode to the bi-level blowing mode, conditioned air having a temperature lower than that at the time of closing can be blown out from both the face blowing port and the foot blowing port.

  Therefore, heat can be avoided by blowing air-conditioned air at a temperature lower than that at the time of closing from the foot toward the upper body including the vicinity of the thigh of the occupant. Furthermore, without providing an additional opening in the air conditioning unit 1, it is possible to eliminate the feeling of hot flashes caused by the direct sunlight of the occupant.

  Further, the second switching point X2 for switching from the bi-level blowing mode to the foot blowing mode is set in the blowing mode selection means S230 during the process of moving from the low heating load area to the high heating area. It is set so that the opening time when the roof is opened is shifted toward the larger heating load than when the roof is closed.

  According to this, there is a feeling of cold wind that cools the vicinity of the waist due to the influence of the wind flowing into the passenger compartment when opening in a cold season. Therefore, at the time of opening, for example, the target blowing temperature TAO is increased to increase the heating load at the second switching point X2 of the blowing mode, and the blowing mode is switched from the foot blowing mode to the bi-level blowing earlier than the closing time. By switching to the mode, it is possible to blow out conditioned air having a temperature higher than that at the time of closing from both the face outlet and the foot outlet. Thereby, cold air can be avoided by blowing high-temperature conditioned air from the feet toward the upper body including the vicinity of the occupant's waist.

  Further, the ECU 2 sets the conditioned air blown from the face opening 9 and the foot opening 10 to be isothermal when the blowing mode at the time of opening is the bi-level blowing mode selected by the blowing mode selection means S230. By being controlled, at the time of opening, isothermal conditioned air is blown from both the face blower outlet and the foot blower outlet, so that the upper body can be cooled or heated from the feet of the occupant at the same temperature. Therefore, the comfort can be improved.

  Further, a roof detection means 26 for detecting the open / closed state of the roof is provided, and the blowing mode selection means S230 is configured to determine whether the blowing mode at the time of opening or the blowing mode at the time of closing based on the opening / closing state detected by the roof detecting means 26. By selecting one of the blowing modes, the blowing mode is automatically switched according to the open / closed state of the roof and the heat load in the passenger compartment, and the comfort can be improved by the switched blowing mode.

(Second Embodiment)
In the first embodiment described above, in the control characteristics of the blow mode selection means S230, the face blow mode, the bi-level blow mode, and the foot blow mode are set from the low (low) temperature to the high (high) temperature of the target blow temperature TAO. However, the present invention is not limited to this, and the foot defroster blowing mode may be set over a temperature at which the target blowing temperature TAO is higher (higher) than the foot blowing mode.

  Specifically, as shown in FIG. 6, the third switching point X3 is set to a temperature at which the target blowing temperature TAO is higher than the second switching point X2 at which the foot blowing mode is switched to the bi-level blowing mode. The third switching point X3 is a point at which the foot blowing mode is switched to the foot defroster blowing mode in the process of moving from a low heating load area to a high heating area.

  In the foot defroster blowing mode, the defroster blowing opening 8 and the foot blowing opening 10 are opened, and the conditioned air whose temperature is adjusted from both the defroster blowing outlet and the foot blowing outlet blows toward the inner surface of the vehicle front window glass and the feet. Is a blowout mode.

  The third switching point X3 at the time of opening is set so as to be shifted to a point at which the target blowing temperature TAO becomes higher than the third switching point X3 at the time of closing. In other words, the third switching point X3 at the time of opening is set by shifting to a point where the heating load becomes larger than the third switching point X3 at the time of closing.

  Thereby, at the time of opening, it can switch from foot blowing mode to foot defroster blowing mode earlier than at the time of closing. Accordingly, by switching to the foot defroster blowing mode earlier than when closing at the time of opening in the cold season, high-temperature conditioned air can be blown toward the passenger from both the defroster outlet and the foot outlet.

  Furthermore, since the defroster outlet is provided above the passenger compartment rather than the face outlet, the chilled air is blown out by high temperature conditioned air being blown out near the passenger's head due to the effect of the wind flowing into the passenger compartment. It can be avoided.

(Third embodiment)
In the above embodiment, in the control characteristics of the blowing mode selection means S230, the face blowing mode, the bi-level blowing mode, and the foot blowing mode are set from the low (low) temperature to the high (high) temperature of the target blowing temperature TAO. Although it set, it is not restricted to this, it is face blowing mode, bilevel B / L1 blowing mode, bilevel blowing mode, bilevel B / L2 blowing from the target blowing temperature TAO from small (low) temperature to large (high) temperature. You may set so that it may become a mode and a foot blowing mode.

  Specifically, as shown in FIG. 7, the control characteristics of the blowing mode selection means S230 are changed from the low (low) temperature to the high (high) temperature of the target blowing temperature TAO, the first switching point X1, the fourth switching point. X4 and the second switching point X2 are set.

  First, in the bi-level B / L1 blowing mode, the face blowing opening 9 and the foot blowing opening 10 are opened, and the conditioned air whose temperature is adjusted from both the face blowing opening and the foot blowing opening is directed toward the occupant's upper body and feet. The blowout mode is set so that the blowout air volume on the face air outlet side is larger than the foot air outlet. That is, it is set so that a larger air volume than the feet is blown to the upper body side of the occupant.

  Further, in the bi-level B / L2 blowing mode, the conditioned air whose temperature is adjusted from both the face blowout opening and the foot blowout opening is directed toward the occupant's upper body and feet. The blowout mode is set so that the blowout air volume on the foot outlet side is larger than the face outlet. That is, it is set so that a larger air volume than the upper body is blown out to the passenger's feet.

  The first switching point X1 is a switching point at which the face blowing mode is switched to the bi-level B / L1 blowing mode, and the second switching point X2 is a switching point at which the bi-level B / L2 blowing mode is switched to the foot blowing mode. The fourth switching point X4 is a switching point at which the bilevel B / L2 blowing mode is switched to the bilevel blowing mode.

  Further, the first switching point X1 at the time of opening is set so as to be shifted to a point where the target blowing temperature TAO becomes smaller than the first switching point X1 at the time of closing. The fourth switching point X4 at the time of opening is set so as to be shifted to a point at which the target blowing temperature TAO becomes higher than the fourth switching point X4 at the time of closing. The second switching point X2 at the time of opening is set so as to be shifted to a point at which the target blowing temperature TAO becomes higher than the second switching point X2 at the time of closing.

  By configuring the control characteristics of the blowing mode selection means S230 as described above, in the open blowing mode of step S232 (see FIG. 4), the first switching point X1 when opened is earlier than when closed. It is possible to switch from the face blowing mode to the bilevel B / L1 blowing mode.

  Thereby, while being able to blow off low-temperature conditioned air from both the face blower outlet and the foot blower outlet earlier than at the time of closing, a larger air volume than the feet can be blown out to the upper body side of the occupant. Therefore, the comfort can be improved more than in the first embodiment.

  Further, at the second switching point X2 at the time of opening, the foot blowing mode can be switched to the bi-level B / L2 blowing mode earlier than at the closing time. Thereby, while being able to blow off high temperature conditioned air from both the face blower outlet and the foot blower outlet earlier than at the time of closing, a larger air volume than the upper body side can be blown out to the occupant's foot side. Therefore, the comfort can be improved more than in the first embodiment.

  Furthermore, at the fourth switching point X4 at the time of opening, the bi-level B / L2 blowing mode can be switched to the bi-level blowing mode earlier than at the closing time. Thereby, conditioned air of high temperature can be blown out from both the face outlet and the foot outlet earlier than at the time of closing.

(Other embodiments)
In the above embodiment, the present invention is applied to an air conditioner for an open car that can open and close the roof of the vehicle. However, the open car includes a vehicle that can open and close a ceiling portion of the vehicle such as a sunroof or a canvas top car.

It is a schematic diagram which shows the whole structure of the air conditioning unit 1 of the air conditioner in 1st Embodiment of this invention. It is a block diagram which shows the electrical wiring of the air-conditioning control apparatus 2 in 1st Embodiment of this invention. It is a flowchart which shows the basic routine of the air-conditioning automatic control of the air-conditioning control apparatus 2 in 1st Embodiment of this invention. It is a flowchart which shows the control processing of the blowing mode selection means S230 shown in FIG. It is a control characteristic figure of blowing mode selection means S230 in a 1st embodiment of the present invention. It is a control characteristic figure of blowing mode selection means S230 in a 2nd embodiment of the present invention. It is a control characteristic figure of blowing mode selection means S230 in a 3rd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air conditioning unit 2 ... ECU, air-conditioning control apparatus (air-conditioning control means)
DESCRIPTION OF SYMBOLS 9 ... Face opening part, opening part 10 ... Foot opening part, opening part 26 ... Roof detection means S230 ... Blowing mode selection means X1 ... 1st switching point X2 ... 2nd switching point X3 ... 3rd switching point

Claims (7)

An air conditioner installed in an open car that can open and close the roof of a vehicle,
An air conditioning unit (1) that blows out the temperature-conditioned air toward the air outlet provided in the passenger compartment;
Air conditioning control means (2) for controlling the air conditioning unit (1) according to the heat load in the passenger compartment;
The air-conditioning control means (2) includes a blowing mode selection means (S230) for selecting one blowing mode based on the thermal load of the vehicle among a plurality of blowing modes,
In the blowing mode selection means (S230), a first switching point (X1) for switching from the face blowing mode to the bi-level blowing mode is set during the process of moving from the high cooling load area to the low cooling area,
The air conditioner for an open car, wherein the first switching point (X1) is shifted toward a larger cooling load when the roof is opened than when the roof is closed. An air conditioner installed in an open car that can open and close the roof of a vehicle,
An air conditioning unit (1) that blows out the temperature-conditioned air toward the air outlet provided in the passenger compartment;
Air conditioning control means (2) for controlling the air conditioning unit (1) according to the heat load in the passenger compartment;
The air-conditioning control means (2) includes a blowing mode selection means (S230) for selecting one blowing mode based on the thermal load of the vehicle among a plurality of blowing modes,
In the blowing mode selection means (S230), a second switching point (X2) for switching from the bi-level blowing mode to the foot blowing mode is set during the process of moving from a low heating area to a high heating area.
The air conditioner for an open car, wherein the second switching point (X2) is shifted toward a larger heating load when the roof is opened than when the roof is closed. The air conditioning unit (1) includes a face opening (9) connected to a face outlet that blows conditioned air toward the upper body of the passenger in the passenger compartment, and a foot blower that blows conditioned air toward the feet of the passenger in the passenger compartment. A foot opening (10) connected to the outlet is formed,
The air-conditioning control means (2) has a bi-level blowing mode when the roof is closed when the blowing mode when the roof is opened is the bi-level blowing mode selected by the blowing mode selection means (S230). The air conditioner for an open car according to claim 1, wherein the air volume on the face opening (9) side is controlled to be larger than the air volume on the foot opening (10) side. The air conditioning unit (1) includes a face opening (9) connected to a face outlet that blows conditioned air toward the upper body of the passenger in the passenger compartment, and a foot blower that blows conditioned air toward the feet of the passenger in the passenger compartment. A foot opening (10) connected to the outlet is formed,
The air-conditioning control means (2) has a bi-level blowing mode when the roof is closed when the blowing mode when the roof is opened is the bi-level blowing mode selected by the blowing mode selection means (S230). The air conditioner for an open car according to claim 2, wherein the air volume on the foot opening (10) side is controlled to be larger than the air volume on the face opening (9) side. The air conditioning unit (1) includes a face opening (9) connected to a face outlet that blows conditioned air toward the upper body of the passenger in the passenger compartment, and a foot blower that blows conditioned air toward the feet of the passenger in the passenger compartment. A foot opening (10) connected to the outlet is formed,
The air conditioning control means (2) includes the face opening (9) and the foot opening when the blowing mode when the roof is opened is the bi-level blowing mode selected by the blowing mode selection means (S230). The air conditioner for an open car according to claim 1 or 2, wherein the conditioned air blown from the section (10) is controlled to be isothermal. An air conditioner installed in an open car that can open and close the roof of a vehicle,
An air conditioning unit (1) that blows out the temperature-conditioned air toward the air outlet provided in the passenger compartment;
Air conditioning control means (2) for controlling the air conditioning unit (1) according to the heat load in the passenger compartment;
The air-conditioning control means (2) includes a blowing mode selection means (S230) for selecting one blowing mode based on the thermal load of the vehicle among a plurality of blowing modes,
In the blowing mode selection means (S230), a third switching point (X3) for switching from the foot blowing mode to the foot defroster blowing mode is set during the process of moving from a low heating load area to a high heating area,
The air conditioner for an open car, wherein the third switching point (X3) is shifted toward a larger heating load when the roof is opened than when the roof is closed. Roof detection means (26) for detecting the open / closed state of the roof is provided,
The blowing mode selecting means (S230) selects one of the blowing mode at the time of opening and the blowing mode at the time of closing based on the open / closed state detected by the roof detecting means (26). The air conditioner for an open car according to any one of claims 1 to 6, characterized in that:

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