JP4914626B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to an air conditioner mounted on a vehicle such as an automobile, and particularly relates to a technical field of a structure in which a plurality of air conditioning zones in a vehicle compartment can be individually air conditioned.

  2. Description of the Related Art Conventionally, as this type of vehicle air conditioner, for example, one configured to individually air-condition a driver's seat zone and a passenger seat zone in a vehicle interior of an automobile is known (see, for example, Patent Document 1). . In the casing of the vehicle air conditioner, a blower fan, a cooling heat exchanger, and a heating heat exchanger are arranged in this order from the upstream side of the air flow. In the portion corresponding to the upstream end of the air flow of the casing, an inside air introduction port for introducing the air in the vehicle interior into the casing and an outside air introduction port for introducing the air outside the vehicle interior into the casing are formed. ing. Further, an inside / outside air switching door that opens one of the inside air introduction port and the outside air introduction port and closes the other is disposed in the casing. The inside / outside air switching door is operated by an actuator provided outside the casing. When the inside / outside air switching door opens the inside air introduction port, the inside air circulation mode introduces air in the vehicle interior to the casing. On the other hand, when the outside air introduction port opens, the outside air introduction mode introduces air outside the vehicle compartment. It is.

  The air flow downstream side of the cooling heat exchanger in the casing is divided into a driver seat side passage through which the conditioned air supplied to the driver seat zone flows and a passenger seat side passage through which the conditioned air supplied to the passenger seat zone flows. Has been. The driver seat side passage and the passenger seat side passage in the casing are provided with a driver seat air mix door and a passenger seat air mix door, respectively. These air mix doors are individually operated by two actuators provided outside the casing.

  The air conditioner includes a control device for controlling the actuator. The control device includes a driver side temperature setting switch as a temperature setting means for the driver to set the temperature of the driver's seat zone, and a temperature setting means for the passenger in the passenger seat to set the temperature of the passenger seat zone. The passenger seat side temperature setting switch is connected to an inside air temperature sensor as an inside air temperature detecting means for detecting the temperature in the passenger compartment.

  The control device includes a control signal on the driver's side and the passenger's side based on the temperature set by the driver's seat temperature setting switch and the passenger's seat temperature setting switch, the temperature detected by the inside air temperature sensor, and the like. The control signal is generated. The two actuators for the air mix door are individually actuated by the control signal on the driver seat side and the control signal on the passenger seat side to open and close the air mix door for the driver seat and the air mix door for the passenger seat. . Thereby, the conditioned air for the driver's seat zone and the conditioned air for the passenger seat zone are generated in the casing and supplied to each zone.

  On the other hand, since the number of inside / outside air switching doors is one and is common to the driver's seat side and the passenger's seat side, the above control device calculates the average value of the driver's seat side control signal and the passenger's seat side control signal. Based on this, the actuator for the inside / outside air switching door is controlled to open and close the inside / outside air switching door.

In general, vehicular air conditioners are designed with an emphasis on the cooling ability among the various performances, in which the occupant can easily feel the difference in performance. For example, when the occupant desires stronger cooling, As a circulation mode, the cooling efficiency is improved. In addition, when a passenger | crew does not want strong air_conditioning | cooling, it is generally performed by the outside air introduction mode, for example at the time of the heating which tends to generate | occur | produce fogging in a window glass.
JP 2002-144841 A

  However, in the air conditioner of Patent Document 1, the common internal / external air switching door is opened and closed on the driver seat side and the passenger seat side based on the average value of the control signal on the driver seat side and the control signal on the passenger seat side. Like to do. For this reason, for example, when a high cooling capacity is required, such as when the passenger in the passenger seat feels hot and desires a stronger cooling by lowering the set temperature on the passenger seat side, If the set temperature is set higher than the set temperature on the passenger seat side, the average value of the two control signals deviates from the value for setting the inside / outside air switching door to the inside air circulation mode, and the inside / outside air switching door is It is conceivable that the outside air introduction mode is set. If the outside air introduction mode is set as described above, the cooling efficiency of the air conditioner is lowered, and a high cooling capacity cannot be obtained, and the comfort of the passenger seat zone is impaired.

  Further, when the control device of Patent Document 1 generates the driver seat side control signal and the passenger seat side control signal, it is necessary to obtain the air conditioning state of the driver seat zone and the passenger seat zone. Zone temperature is required. However, since the vehicle air conditioner of Patent Document 1 has one inside air temperature sensor, the temperature of one zone cannot be detected, and the control signal for the zone in which this temperature cannot be detected is not suitable for the zone. There is a risk of becoming. When the mode of the inside / outside air switching door is determined using such a control signal, the determined mode may not correspond to the zone, and comfort may be impaired. On the other hand, it is conceivable to increase the inside air temperature sensor to two so as to correspond to the number of zones. In this case, the number of parts increases as the inside air temperature sensor increases, and the number of parts increases. Assembling man-hours increase, and the cost of the air conditioner for the vehicle increases.

  The present invention has been made in view of such various points, and an object of the present invention is to be able to estimate the temperature of an air-conditioning zone that does not have an inside air temperature detecting means, while avoiding an increase in the number of parts, An object of the present invention is to realize a comfortable air conditioning in the passenger compartment by setting the mode of the switching means so that the passenger comfort is emphasized.

  In order to achieve the above object, in the present invention, the temperature of the second air conditioning zone is estimated based on temperature estimation information including the temperature detected by the inside air temperature detecting means arranged in the first air conditioning zone, and the first temperature setting means The mode of the inside / outside air switching means is selected based on the target temperature for control calculated based on the calculation condition including the temperature set in step 5 and the temperature detected by the inside air temperature detecting means, and set by the second temperature setting means The mode of the inside / outside air switching means is selected based on the control target temperature calculated based on the calculation condition including the calculated temperature and the temperature of the second air conditioning zone estimated by the estimation means, and these two selected modes are selected. When at least one of them is in the inside air circulation mode, the inside / outside air switching means is set to the inside air circulation mode.

Specifically, the invention of claim 1 includes a casing having a first passage and a second passage corresponding to the first air-conditioning zone and the second air-conditioning zone in the passenger compartment, and the air-conditioning zone is provided for each air-conditioning zone in the casing. In the vehicle air conditioner configured to supply the generated conditioned air from the first passage and the second passage to the first air conditioning zone and the second air conditioning zone, the vehicle is provided with the casing, and the first passage and the second passage An inside / outside air switching means for switching between an inside air circulation mode in which the air introduced into the two passages is air inside the passenger compartment and an outside air introduction mode in which the air outside the passenger compartment is air; and a passenger for setting the temperature of the first air conditioning zone First temperature setting means; second temperature setting means for a passenger to set the temperature of the second air conditioning zone; inside air temperature detecting means disposed in the first air conditioning zone; and the inside air temperature detection Based on the temperature estimation information including the temperature detected in the stage, the estimation means for estimating the temperature of the second air conditioning zone, and the calculation condition including the temperature set by the first temperature setting means, the internal and external The control target temperature for the inside / outside air switching means is calculated based on the calculation condition including the temperature set by the first target temperature calculating means for calculating the control temperature of the air switching means and the second temperature setting means. Selecting the mode of the inside / outside air switching means based on the second target temperature computing means, the control target temperature computed by the first target temperature computing means, and the temperature detected by the inside air temperature detecting means Based on the control target temperature calculated by the first mode selection means, the second target temperature calculation means, and the temperature of the second air conditioning zone estimated by the estimation means. To select And mode selection means, when at least one of the said first mode selecting means and second mode selecting means has selected the inside air circulation mode, while the inside air circulation mode the in outside air switching unit, said first mode A final mode determining means for setting the inside / outside air switching means to the outside air introduction mode when both the selection means and the second mode selection means select the outside air introduction mode ;
It is assumed to be configured to perform air-conditioning in the mode selected in the final mode decision means.

  According to this configuration, the calculation condition of the control target temperature calculated by the first target temperature calculation means includes the temperature set by the first temperature setting means. The mode of the inside / outside air switching means corresponding to the first air conditioning zone is selected. In addition, since the target temperature calculation condition calculated by the second target temperature calculation means includes the temperature set by the second temperature setting means, the second mode selection means includes the second air conditioning zone. The corresponding mode of the inside / outside air switching means is selected. When selecting the inside / outside air switching means mode corresponding to the second air conditioning zone, the temperature of the second air conditioning zone estimated by the estimating means is used, and therefore the inside air temperature detecting means is arranged in the second air conditioning zone. Without any change, the mode of the inside / outside air switching means can be set to a mode suitable for the second air conditioning zone.

  When the occupant in the first air conditioning zone desires stronger cooling, such as when a temperature as low as about 20 ° C. is set by the first temperature setting means, the first target temperature calculation means calculates the temperature. The target temperature becomes a temperature corresponding to the target temperature, and the inside air circulation mode is selected by the first mode selection means. On the other hand, when a temperature higher than, for example, 20 ° C. is set by the first temperature setting means and the occupant in the first air conditioning zone does not want to cool, the outside air introduction mode is selected by the first mode selection means. become. Similarly, in the second mode selection means, the inside air circulation mode is selected when the passenger in the second air conditioning zone desires strong cooling, and the outside air introduction mode is selected otherwise. It will be.

  When at least one of the first mode selection means and the second mode selection means selects the inside air circulation mode, the mode of the inside / outside air switching means is determined as the inside air circulation mode by the final mode determination means, and the inside / outside air circulation mode is determined. The air switching means is in the inside air circulation mode. Thereby, when at least one crew member of the 1st air-conditioning zone and the 2nd air-conditioning zone wants strong cooling, it becomes possible to raise the cooling efficiency of an air-conditioner.

  According to a second aspect of the present invention, in the first aspect of the invention, an outside air temperature detecting means for detecting a temperature outside the passenger compartment is provided, and the calculation conditions of the first target temperature calculating means and the second target temperature calculating means include the outside temperature The temperature detected by the detecting means is included.

  According to this configuration, it is possible to reflect the temperature outside the passenger compartment when calculating the control target temperature of the inside / outside air switching means.

  According to a third aspect of the invention, there is provided the solar radiation amount detecting means for detecting the solar radiation amount according to the first or second aspect of the invention, and the calculation conditions of the first target temperature calculating means and the second target temperature calculating means include the solar radiation amount. The solar radiation amount detected by the detecting means is included.

  According to this configuration, it is possible to reflect the amount of solar radiation when calculating the control target temperature of the inside / outside air switching means.

  According to the first aspect of the present invention, the temperature of the second air conditioning zone is estimated based on the temperature estimation information including the temperature detected by the inside air temperature detecting means arranged in the first air conditioning zone, and the second air conditioning zone is supported. When the inside / outside air switching means mode is selected, the temperature of the second air conditioning zone estimated by the estimation means is used. For this reason, the mode of the inside / outside air switching means suitable for the second air conditioning zone can be selected without arranging the inside air temperature detecting means in the second air conditioning zone, and the increase in the cost of the vehicle air conditioner can be avoided. Can do. Further, when at least one of the first mode selection means for selecting the mode of the inside / outside air switching means corresponding to the first air conditioning zone and the second mode selection means has selected the inside air circulation mode, the inside / outside air switching means Can be set to the inside air circulation mode. Thereby, when at least one of the occupant of the first air conditioning zone and the occupant of the second air conditioning zone desires strong cooling, the cooling efficiency of the air conditioner can be increased, and comfortable air conditioning can be realized. it can.

  According to the invention of claim 2, since the temperature outside the vehicle compartment is included in the calculation conditions of the first target temperature calculating means and the second target temperature calculating means, the control target temperature of the inside / outside air switching means is set outside the vehicle interior. A more appropriate temperature reflecting the temperature can be achieved.

  According to the invention of claim 3, since the amount of solar radiation is included in the calculation conditions of the first target temperature calculating means and the second target temperature calculating means, the control target temperature of the inside / outside air switching means is reflected in the solar radiation state. The temperature can be more appropriate.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a schematic structure of a vehicle air conditioner 1 according to an embodiment of the present invention. In the description of this embodiment, the structure of the vehicle will be described before the structure of the air conditioner 1 is described. As shown in FIG. 2, an instrument panel IP is disposed at the front end of the passenger compartment. An operation panel 2 of the air conditioner 1 is disposed at a substantially central portion on the left and right of the instrument panel IP. A driver's seat (not shown) is provided on the right side of the vehicle body and a passenger seat (not shown) is provided on the left side of the instrument panel IP.

  A defroster port 3 through which conditioned air blows toward the inner surface of a front window (not shown) is opened at the front end of the instrument panel IP. Demister ports 4 through which conditioned air blows out toward the inner surface of a side window (not shown) are opened at the left and right ends of the upper side of the instrument panel IP. A center vent port 5 and a side vent port 6 through which air-conditioned air blows toward the upper body of the driver's occupant are opened on the driver's seat side in the substantially vertical center of the instrument panel IP. A center vent port 7 and a side vent port 8 from which air-conditioned air blows toward the upper half of the passenger in the passenger seat are opened on the passenger seat side in the substantially vertical center of the instrument panel IP.

  A floor tunnel (not shown) extending in the longitudinal direction of the vehicle body is provided between the driver's seat and the passenger seat of the vehicle body. This floor tunnel is covered from above by a center console 10 extending in the longitudinal direction of the vehicle body.

  The air conditioner 1 is fixed to the instrument panel IP and the vehicle body while being housed inside the instrument panel IP. The air conditioner 1 individually air-conditions a driver's seat zone Dr as a first air-conditioning zone and a passenger seat zone Ps as a second air-conditioning zone. The driver's seat zone Dr is the right side of the center in the left-right direction in the passenger compartment, that is, the side where the driver's seat is installed, and the passenger seat zone Ps is the left side of the center in the left-right direction in the passenger compartment. This is the side where the passenger seat is installed.

  The air conditioner 1 includes a control device 30 described later and a casing 20 (shown in FIG. 1) formed by molding a resin material. The casing 20 is provided with an air introduction unit 21, a temperature adjustment unit 22, and an conditioned air distribution unit 23. The casing 20 is divided into three parts, for example, an air introduction part 21, a temperature adjustment part 22, and an conditioned air distribution part 23, or two casings 20 are provided for the air introduction part 21, the temperature adjustment part 22, and the conditioned air distribution part 23. It may be divided.

  The air introduction portion 21 is connected to an inside air introduction port 25 that opens in the vehicle interior and takes air in the vehicle interior into the casing 20, and a duct (not shown) that communicates with the outside of the vehicle interior. An outside air inlet 26 for taking in the casing 20 is formed. Inside the air introduction part 21, an inside / outside air switching door 27 that opens one of the inside air introduction port 25 and the outside air introduction port 26 and closes the other is provided. The inside / outside air switching door 27 is operated by an inside / outside air switching door actuator 28 fixed to the outer surface of the casing 20. The inside / outside air switching door actuator 28 has a known structure with a built-in servo motor. The inside / outside air switching door 27 and the inside / outside air switching door actuator 28 are an inside / outside air switching means for switching between an inside air circulation mode in which the air introduced into the casing 20 is air inside the vehicle compartment and an outside air introduction mode in which the air outside the vehicle compartment is air. The inside / outside air switching unit 29 is configured.

  An air filter 31 and a blower fan 32 for filtering the air introduced into the casing 20 are directed downstream of the inside / outside air switching door 27 inside the air introduction portion 21 in the air flow direction. It is provided in order. The blower fan 32 is a centrifugal fan, and is arranged so that the rotation shaft extends in the vertical direction. A blower motor 33 for rotationally driving the blower fan 32 is disposed below the blower fan 32. This blower motor 33 is fixed to the casing 20 with a part protruding outside the casing 20.

  The temperature adjusting unit 22 is located downstream of the air introducing unit 21 in the air flow direction. A refrigerant evaporator 35 serving as a heat exchanger for cooling is accommodated in the temperature adjustment unit 22. The refrigerant evaporator 35, a compressor (not shown) in which power from an engine (not shown) is transmitted via an electromagnetic clutch 90 (shown in FIG. 3), a refrigerant condenser (not shown), A well-known refrigeration cycle is constituted by an expansion valve (not shown). An evaporator temperature sensor 37 for detecting the temperature of the air that has passed through the refrigerant evaporator 35 is attached to the surface of the refrigerant evaporator 35 on the downstream side of the air flow.

  The air flow downstream side of the evaporator temperature sensor 37 inside the temperature adjusting unit 22 communicates with the driver seat side passage 41 as the first passage communicating with the driver seat zone Dr and the passenger seat zone Ps by the partition wall 40. It is divided into a passenger seat side passage 42 as a second passage. A heater core 43 serving as a heat exchanger for heating, which is configured to circulate cooling water of the engine, is accommodated on the downstream side of the refrigerant evaporator 35 inside the temperature adjusting unit 22. The heater core 43 passes through the partition wall 40 in the middle of the air flow direction. About half of the heater core 43 protrudes from the partition wall 40 so as to block a part of the driver seat side passage 41, and the remainder of the driver seat side passage 41 bypasses the heater core 43 with the air that has passed through the refrigerant evaporator 35. A bypass passage 44 is provided. Similarly, the other half of the heater core 43 projects into the passenger seat side passage 42, and a bypass passage 45 is also formed in the passenger seat side passage 42.

  A driver seat side air mix door 46 and a passenger seat side air mix door 47 are disposed on the air flow upstream side of the heater core 43. The driver seat side air mix door 46 and the passenger seat side air mix door 47 are a driver seat side air mix door actuator 48 and a passenger seat side air mix door actuator 49 (both shown in FIG. 3) fixed to the outer surface of the casing 20. It operates individually. These actuators 48 and 49 are configured similarly to the inside / outside air switching door actuator 28.

  By operating the driver's seat side air mix door actuator 48 and changing the opening degree of the bypass passage 44 by the driver's seat side air mix door 46, the conditioned air flowing downstream from the bypass passage 44 of the driver seat side passage 41. The temperature of is changed. When the opening degree of the driver side air mix door 46 is 0%, the passage on the heater core 43 side is fully closed and the bypass passage 44 is fully opened. When the opening degree is 100%, the passage on the heater core 43 side is fully opened and the bypass passage. 44 is fully closed. Further, by operating the passenger seat side air mix door actuator 49 to change the opening degree of the bypass passage 45 by the passenger seat side air mix door 47, the passenger seat side passage 42 flows downstream from the bypass passage 45. The temperature of the conditioned air is changed. In the passenger seat side air mix door 47, the passage on the heater core 43 side is fully closed and the bypass passage 45 is fully opened when the opening degree is 0%, and the passage on the heater core 43 side is fully opened when the opening degree is 100%. In addition, the bypass passage 44 is fully closed.

  By adjusting the temperature of the conditioned air by the driver seat side air mix door 46, the temperature of the conditioned air blown to the driver seat zone Dr changes, and the amount of heat supplied to the driver seat changes to the zone Dr. Become. Further, the temperature of the conditioned air blown to the passenger seat zone Ps is changed by changing the temperature of the conditioned air by the passenger seat side air mix door 47, so that the amount of heat supplied to the passenger seat changes to the zone Ps. become.

  The conditioned air distribution unit 23 is located downstream of the temperature adjusting unit 22 in the air flow direction. The inside of the conditioned air distribution unit 23 is divided into a driver seat side passage 41 and a passenger seat side passage 42 by the partition wall 40. The driver seat side passage 41 is connected to an upstream end of a driver seat side vent duct 50 that guides conditioned air to the center vent port 5 and the side vent port 6 on the driver seat side. The opening at the upstream end of the driver seat side vent duct 50 is connected to an air outlet formed in the casing 20 and is opened and closed by a driver seat side vent door 51 disposed inside the driver seat side passage 41. Yes. The driver seat side passage 41 is connected to an upstream end of a driver seat side foot duct 52 that guides conditioned air near the feet of the driver seat and near the feet of the rear seat of the driver seat. The rear seat side portion of the driver seat side foot duct 52 is opened near the floor of the vehicle body.

  The upstream opening of the driver's seat side foot duct 52 is also an outlet formed in the casing 20, and is opened and closed by a driver's seat side foot door 53 disposed in the driver's seat side passage 41. The driver seat side passage 41 is connected to an upstream end of a defroster duct 54 that guides conditioned air to the defroster port 3 and the demister port 4. The upstream end opening of the defroster duct 54 communicates with the air outlet formed in the casing 20 and is opened and closed by a defroster door 55 disposed in the driver's seat side passage 41.

  The driver seat side passage 41 is connected to an upstream end of a passenger seat side vent duct 56 that guides conditioned air to the center vent port 7 and the side vent port 8 on the passenger seat side. The opening at the upstream end of the passenger seat side vent duct 56 communicates with an air outlet formed on the driver seat side of the casing 20 so as to be opened and closed by a passenger seat side vent door 57 disposed inside the casing 20. It has become. The passenger seat side passage 42 is connected to the upstream end of the passenger seat side foot duct 58 that guides the air-conditioning air to the vicinity of the feet of the passenger seat and the vicinity of the feet of the rear seat of the passenger seat. The rear seat side portion of the passenger seat side foot duct 58 is also open near the floor of the vehicle body. The opening at the upstream end of the passenger seat side foot duct 58 is also communicated with the air outlet formed in the casing 20, and is opened and closed by a passenger seat side foot door 59 disposed in the passenger seat side passage 42. .

  The driver seat side vent door 51 and the passenger seat side vent door 57 are operated in the same manner by one blower outlet switching actuator 60. The driver seat side foot door 53 and the passenger seat side foot door 59 are also operated in the same manner by the blowout port switching actuator 60. Further, the defroster door 55 is actuated by the blower outlet switching actuator 60. The air outlet switching actuator 60 has a well-known structure with a built-in servo motor, like the inside / outside air switching actuator 28, and is fixed to the casing 20.

  As shown in FIGS. 2 and 3, the air conditioner 1 includes an inside air temperature sensor 65 as an inside air temperature detecting means, an outside air temperature sensor 66 as an outside air temperature detecting means, and a solar radiation sensor 67 as a solar radiation amount detecting means. Yes. The inside air temperature sensor 65 is disposed on the driver's seat side of the instrument panel IP and detects the temperature of air in the driver's seat zone Dr. The outside air temperature sensor 66 is for detecting the temperature of the air outside the passenger compartment, and is disposed near the front grille (not shown), near the door mirror (not shown), and the like. The said solar radiation sensor 67 is for detecting the solar radiation amount which is the intensity | strength of the sunlight which inserts into a vehicle interior, and is arrange | positioned at the front-end part of instrument panel IP. The solar radiation sensor 67 has directivity configured to be able to individually detect the solar radiation amount on the right side of the vehicle body, that is, the driver's seat side, and the solar radiation amount on the left side of the vehicle body, that is, the passenger seat. . Note that the position where the inside air temperature sensor 65 is disposed is not limited to the above-described position, and may be within the driver's seat zone Dr.

  On the operation panel 2 of the instrument panel IP, as shown in FIG. 3, a driver side temperature setting switch 68 as first temperature setting means, a passenger side temperature setting switch 69 as second temperature setting means, and an independent / Interlocking switch 70, AUTO switch 71, OFF switch 72, air volume switching switch 73, blowing mode switching switch 74, defroster switch 75, inside / outside air switching switch 76, and A / C switch 77 are provided.

  The driver seat side temperature setting switch 68 is located on the driver seat side of the operation panel 2 and is used by an occupant to set the set temperature of the driver seat zone Dr. The passenger seat side temperature setting switch 69 is located on the passenger seat side of the operation panel 2 and is used by an occupant to set the set temperature of the passenger seat zone Ps. The independent / interlocking switch 70 is for switching between an independent mode in which the driver's seat zone Dr and the passenger seat zone Ps are individually air-conditioned and an interlocking mode in which both the zones Dr and Ps are similarly air-conditioned. The AUTO switch 71 is for setting the air conditioner 1 to the automatic mode. The OFF switch 72 is for stopping the operation of the air conditioner 1. The air volume changeover switch 73 is for increasing or decreasing the air conditioning air volume in multiple stages.

  The blowing mode changeover switch 74 includes a defroster mode in which the conditioned air is blown out from the defroster port 3 and the demister port 4, and a def foot mode in which the defroster port 3, the demister port 4 and the foot ducts 52 and 58 are blown out. The vent mode blowing from the center vent ports 5 and 7 and the side vent ports 6 and 8, the foot mode blowing from the foot ducts 52 and 58, the center vent ports 5, 7, the side vent ports 6, 8 and the foot ducts 52, 58 This is for selecting one of the bi-level modes to be blown out from. The defroster switch 75 is used to increase the air-conditioning air volume with the blowing mode as the defroster mode. The inside air circulation switch 76 is for switching between the inside air circulation mode and the outside air introduction mode. The A / C switch 77 is for selecting whether or not to operate the compressor of the refrigeration cycle.

  The operation panel 2 is provided with a driver seat side set temperature display section 80 and a passenger seat side set temperature display section 81. Each of these display units 80 and 81 is configured by an LED, a liquid crystal display device, or the like. The driver seat side set temperature display unit 80 and the passenger seat side set temperature display unit 81 are for displaying the temperatures set by the driver seat side temperature setting switch 68 and the passenger seat side temperature setting switch 69, respectively. .

  The control device 30 constitutes the control means of the present invention. The control device 30 includes a central processing unit, a random access memory (RAM), a read only memory (ROM), an input / output port (not shown), etc., and is supplied with power from an in-vehicle battery (not shown). In response to the operation. The switches 68 to 77 and the display units 80 and 81 are connected to the input / output port of the control device 30, and the evaporator temperature sensor 37, the engine water temperature sensor 64, the inside air temperature sensor 65, the outside air temperature sensor 66, and the solar radiation sensor 67. The blower motor 33, the actuators 28, 48, 49, 60, and the control signal line of the electromagnetic clutch 90 for the compressor are connected. The engine water temperature sensor 64 is for detecting the cooling water temperature of the engine.

  The control device 30 processes the signals from the sensors 37 and 64 to 67 and the signals from the switches 68 to 77 according to a predetermined program, switches the rotational speed of the blower motor 33, and controls the actuators 28, 48, 49, 60. While controlling the operation amount, the on / off state of the electromagnetic clutch 90, etc., the display units 80 and 81 are configured to display a predetermined display. The control device 30 is provided with a temperature estimation unit 91 which is the estimation means of the present invention. The temperature estimation unit 91 is based on temperature estimation information including the set temperature of the driver seat side temperature setting switch 68, the set temperature of the passenger seat side temperature setting switch 69, and the temperature detected by the inside air temperature sensor 65. The temperature of the air in the seat zone Ps is estimated. The rotation speed of the blower motor 33 is switched by changing the voltage.

  The control device 30 reads signals from the sensors 37 and 64 to 67 and the switches 68 to 77 when the ignition switch of the vehicle is turned on. The control device 30 calculates the target temperature of the conditioned air to be supplied to the driver's seat zone Dr when the AUTO switch 71 is ON or when the AUTO switch 71 is turned ON from OFF, The target temperature of the conditioned air supplied to the passenger seat zone Ps is calculated. The target temperature of the conditioned air supplied to the driver's seat zone Dr is the set temperature of the driver's seat side temperature setting switch 68, the temperature detected by the inside air temperature sensor 65, the amount of solar radiation on the driver's seat detected by the solar sensor 67, and the outside air It is determined based on the air conditioning condition including the outside air temperature detected by the temperature sensor 66. Thereafter, in the control device 30, in consideration of output signals from the air temperature sensor 37, the engine water temperature sensor 64, and the like, the driver seat side air mix door 46 is set so that the temperature of the conditioned air in the driver seat side passage 41 becomes the target temperature. , The driver's seat side air mix door actuator 48 is operated to set the driver's seat side air mix door 46 to a desired opening.

  On the other hand, the target temperature of the conditioned air supplied to the passenger seat zone Ps is the operation detected by the set temperature of the passenger seat side temperature setting switch 69 and the inside air temperature sensor 65 until a predetermined time has elapsed after the start of air conditioning of the passenger compartment. It is determined based on the air conditioning conditions including the air temperature in the seat zone Dr, the amount of solar radiation on the passenger seat side detected by the solar sensor 67, and the outside air temperature detected by the outside air temperature sensor 66. The reason why the temperature of the inside air temperature sensor 65 is used as the air conditioning condition of the passenger seat zone Ps until a predetermined time has elapsed after the start of air conditioning is that the set temperature differs between the driver seat side and the passenger seat side immediately after the air conditioning start. However, the air conditioning is not perfect, and there is almost no temperature difference between the driver's seat zone Dr and the passenger seat zone Ps. That is, the temperature of the air in the driver's seat zone Dr is regarded as the temperature of the air in the passenger seat zone Ps.

  When a predetermined time has elapsed since the start of air conditioning, the temperature estimating unit 91 estimates the temperature of the air in the passenger seat zone Ps. In this case, the following formula is used.

TrPs = Tr + (SetPs−SetDr) × H
Here, TrPs is the estimated temperature of the air in the passenger seat zone Ps. This estimated temperature is a value for control. In addition, Tr is a value after performing the later-described process for converting the temperature detected by the inside air temperature sensor 65 into a control value. Further, SetPs is a set temperature on the passenger seat side, and SetDr is a set temperature on the driver seat side. H is a correction coefficient that is changed according to the air conditioning state of the passenger compartment. However, H is assumed not to be a negative value.

  The process performed in the temperature estimation unit 91 when estimating the temperature of the passenger seat zone Ps will be described based on the flowchart shown in FIG. This process is repeated at predetermined time intervals.

  In step SA1 after the start of the flowchart, the temperature of the inside air temperature sensor 65 is input. In subsequent step SA2, the set temperature SetDr of the driver seat side temperature setting switch 68 is input, and in step SA3, the set temperature SetPs of the passenger seat side temperature setting switch 69 is input. Then, the process proceeds to Step SA4. In step SA4, when the temperature of the inside air temperature sensor 65 (indicated by a broken line in FIG. 5) changes, a delay process is performed to delay the signal waveform by t seconds, as shown in FIG. Thereafter, the process proceeds to step SA5, where the control value calculation process is performed. This control value calculation process is a process in which, when the temperature detected by the inside air temperature sensor 65 changes, the temperature before the change gradually approaches the changed temperature over a predetermined time. Through this step SA5, Tr that draws a curve as shown by the solid line in FIG. 5 is obtained. FIG. 5 shows the case where the temperature detected by the inside air temperature sensor 65 is changed from 20 ° C. to 22 ° C., but when the temperature is changed to the low temperature side, Tr which draws a curve below is obtained.

  In the subsequent step SA6, for example, when the set temperature SetDr (shown by a broken line in FIG. 6) is changed by the operation side temperature setting switch 68, the temperature before the change is taken over a predetermined time as shown by the solid line in FIG. A set temperature change process is performed in which the temperature gradually approaches the vicinity of the changed temperature. FIG. 6 shows a case where the set temperature SetDr on the driver's seat side is changed from 20 ° C. to 23 ° C., but the same applies when the set temperature is changed to the low temperature side. The same process is performed when the set temperature SetPs of the passenger seat side temperature setting switch 69 is changed.

  Thereafter, the process proceeds to step SA7 to calculate a temperature TrDr for controlling the driver's seat zone Dr. Specifically, in this step SA7, a process of setting the temperature Tr obtained as described above to the control temperature TrDr is performed.

  Thereafter, the process proceeds to step SA8, where Tr + (SetPs−SetDr) × H which is the right side of the above equation is calculated to calculate the temperature TrPs for controlling the passenger seat zone Ps.

  In this step SA8, for example, if the set temperature SetDr on the driver's seat side is set lower than the set temperature SetPs on the passenger seat side, the (SetPs−SetDr) × H term becomes a positive value, and the value of this term Is added to Tr. That is, if the driver seat side set temperature SetDr is lower than the passenger seat side set temperature SetPs, the temperature of the air in the driver seat zone Dr becomes lower than the temperature of the air in the passenger seat zone Ps over time after the start of air conditioning. Therefore, the temperature detected by the inside air temperature sensor 65 is lower than the temperature of the air in the passenger seat zone Ps. Therefore, the estimated temperature of the passenger seat zone Ps can be obtained by adding the value obtained by subtracting the driver seat side set temperature SetDr from the passenger seat side set temperature SetPs to the temperature of the inside air temperature sensor 65 as in the above formula.

  On the other hand, if the set temperature SetDr on the driver's seat side is set higher than the set temperature SetPs on the passenger seat side, the (SetPs−SetDr) × H term becomes a negative value, and the absolute value of this term is the inside air temperature sensor. Will be subtracted from the temperature of 65. That is, if the set temperature SetDr on the driver's seat side is higher than the set temperature SetPs on the passenger seat side, the air temperature in the driver's seat zone Dr becomes higher than the passenger seat zone Ps over time after the start of air conditioning. The temperature detected by the temperature sensor 65 is higher than the temperature of the air in the passenger seat zone Ps. Therefore, by subtracting the value obtained by subtracting the driver seat side set temperature SetDr from the passenger seat side set temperature SetPs from the temperature of the inside air temperature sensor 65 as in the above formula, the estimated temperature TrPs of the passenger seat zone Ps is calculated. Is obtained.

  The controller 30 calculates the opening degree of the passenger seat side air mix door 47 in the same manner as the opening degree of the driver seat side air mix door 46, and then calculates the passenger seat side air mix door. The door actuator 49 is operated to set the passenger seat side air mix door 47 to a desired opening. As described above, the individual air conditioning of the driver seat zone Dr and the passenger seat zone Ps is performed.

  Further, the control device 30 calculates the target temperature RFTtrgDr for inside / outside air switching control on the driver's seat side and the target temperature RFTtrgPs for inside / outside air switching control on the passenger side, and calculates the target temperature RFTtrgDr for inside / outside air switching control on the driver's seat side. The mode of the inside / outside air switching unit 29 is selected based on the control temperature TrDr of the driver's seat zone Dr, and the target temperature RFTtrgPs for the inside / outside air switching control on the passenger seat side and the estimated temperature TrPs of the passenger seat zone Ps are set. Based on the above, the mode of the inside / outside air switching unit 29 is selected, and the mode of the inside / outside air switching unit 29 is finally determined based on the selected mode. Processing for determining the mode of the inside / outside air switching unit 29 will be described based on the flowchart shown in FIG. This process is repeated at predetermined time intervals.

  In step SB1 after the start of the flowchart of FIG. 7, the temperature Ta of the outside air temperature sensor 66 is input. In the subsequent step SB2, the driver side solar radiation amount SRADr and the passenger side solar radiation amount SRAPs output from the solar radiation sensor 67 are input.

  In subsequent step SB3, the calculation conditions include the temperature SetDr set by the driver seat side temperature setting switch 68, the temperature Ta detected by the outside air temperature sensor 66, and the solar radiation amount SRADr detected by the solar sensor 67. Based on this, the inside / outside air switching control target temperature RFTtrgDr on the driver's seat side is calculated. Specifically, the target temperature RFTtrgDr for the inside / outside air switching control on the driver seat side is increased as the temperature SetDr set by the driver seat side temperature setting switch 68 is lowered, or the temperature Ta detected by the outside air temperature sensor 66 is set. The higher the value is, the higher it is, or the higher the amount of solar radiation SRADr on the driver's seat detected by the solar radiation sensor 67 is, the higher it is. That is, the target temperature RFTtrgDr for inside / outside air switching control on the driver's seat side is increased in a situation where the cooling of the driver's seat zone Dr is strongly required. This step SB3 constitutes a first target temperature calculation means.

  In subsequent step SB4, the calculation conditions include the temperature SetPs set by the passenger seat side temperature setting switch 69, the temperature Ta detected by the outside air temperature sensor 66, and the solar radiation amount SRAPs detected by the solar sensor 67. Based on the passenger seat side inside / outside air switching control target temperature RFTtrgPs is calculated. Specifically, the passenger seat side inside / outside air switching control target temperature RFTtrgPs is increased as the temperature SetPs set by the passenger seat side temperature setting switch 69 is lowered, or the temperature Ta detected by the outside air temperature sensor 66 is set. Is increased, or is increased as the amount of solar radiation SRAPs on the passenger seat side detected by the solar radiation sensor 67 is increased. That is, the target temperature RFTtrgPs for the inside / outside air switching control on the passenger seat side is increased in a situation where cooling of the passenger seat zone Ps is strongly required. This step SB4 constitutes a second target temperature calculation means.

  In subsequent step SB5, a switching temperature TrecDr serving as a switching point for switching the mode of the inside / outside air switching unit 29 from the outside air introduction mode to the inside air circulation mode is obtained. This switching temperature TrecDr is a value corresponding to the driver's seat zone Dr. In the processing performed in step SB5, as shown in FIG. 8, a graph of a linear function is used, in which the horizontal axis represents the driver seat side inside / outside air switching target temperature RFTtrgDr and the vertical axis represents the switching temperature TrecDr. This graph is stored in the control device 30 in advance. When the target temperature RFTtrgDr on the driver's seat side calculated in step SB3 is KDr, for example, KDr, the switching temperature CDr1 is obtained from this KDr.

  In subsequent step SB6, the switching temperature CDr1 obtained in step SB5 is compared with the temperature TrDr of the driver's seat zone Dr, and one of the inside air circulation mode and the outside air introduction mode is selected based on the comparison result. Do. Specifically, as shown in FIG. 9, when the inside / outside air switching unit 29 is in the outside air introduction mode, the inside air circulation mode is selected when the temperature TrDr of the driver's seat zone Dr becomes equal to or higher than CDr1. In other words, the fact that the temperature TrDr in the driver's seat zone Dr is at a temperature higher than CDr1 means that stronger cooling is required, and at this time, an internal air circulation mode that improves the cooling efficiency is selected. Become. On the other hand, when the inside / outside air switching unit 29 is in the inside air circulation mode, the outside air introduction mode is selected when the temperature of the driver's seat zone Dr becomes equal to or lower than CDr2 lower than CDr1. Steps SB5 and SB6 constitute first mode selection means.

  In subsequent step SB7, a switching temperature TrecPs is obtained as a switching point for switching the mode of the inside / outside air switching unit 29 from the outside air introduction mode to the inside air circulation mode. The switching temperature TrecPs is a value corresponding to the passenger seat zone Ps. In the process performed in step SB7, as in step SB5, as shown in FIG. 10, a linear function with the abscissa axis representing the passenger seat side inside / outside air switching target temperature RFTtrgPs and the ordinate axis representing the switching temperature TrecPs. Use a graph. Then, when the target temperature RFTtrgPs on the passenger seat side calculated in step SB4 is, for example, KPs, the switching temperature CPs is obtained from this KPs as shown by the broken line.

  In subsequent step SB8, the switching temperature CPs1 obtained in step SB7 is compared with the temperature TrPs of the passenger seat zone Ps, and based on the comparison result, one of the inside air circulation mode and the outside air introduction mode is selected. Do. Specifically, as shown in FIG. 11, when the inside / outside air switching unit 29 is in the outside air introduction mode, the inside air circulation mode in which the cooling efficiency is improved is selected when the temperature TrPs of the passenger seat zone Ps becomes equal to or higher than CPs1. On the other hand, when the inside / outside air switching unit 29 is in the inside air circulation mode, the outside air introduction mode is selected when the temperature of the passenger seat zone Ps becomes equal to or lower than CPs2 lower than CPs1. Steps SB7 and SB8 constitute second mode selection means.

  The mode of the inside / outside air switching unit 29 selected in steps SB6 and SB8 is temporarily stored in the control device 30, and the mode of the inside / outside air switching unit 29 is immediately switched to the selected mode. There is no such thing.

  In step SB9, the mode of the inside / outside air switching unit 29 is determined by a combination of the mode RFDr corresponding to the driver seat zone Dr selected in step SB6 and the mode RFPs corresponding to the passenger seat zone Ps selected in step SB8. Select. That is, as shown in the combination table in step SB9, when the RFDr corresponding to the driver's seat zone Dr is set to the inside air circulation mode, the RFPs corresponding to the passenger seat zone Ps is set to the inside air circulation mode. A room air circulation mode is selected. In addition, if RFPr is in the outside air circulation mode when RFDr is in the inside air circulation mode, the inside air circulation mode is selected. Further, when RFDr is in the outside air circulation mode when RFDr is in the outside air circulation mode, the inside air circulation mode is selected. In addition, when RFDr is in the outside air circulation mode when RFDr is in the outside air circulation mode, the outside air circulation mode is selected. That is, in step SB9, if the inside air circulation mode is selected in one or both of steps SB6 and SB8, the inside air circulation mode is selected, and the outside air introduction is performed only when the outside air introduction mode is selected in both. Select a mode.

  In step SB10 following step SB9, it is determined whether the mode selected in step SB9 is the inside air circulation mode or the outside air introduction mode. If the determination in step SB10 is NO, that is, if the mode selected in step SB9 is the outside air introduction mode, the process proceeds to step SB11. In step SB11, the mode of the inside / outside air switching unit 29 is finally determined to be the outside air introduction mode, and the inside / outside air switching unit 29 is set to the outside air introduction mode. On the other hand, if the determination in step SB10 is YES, that is, if the mode selected in step SB9 is the inside air circulation mode, the process proceeds to step SB12. In step SB12, the mode of the inside / outside air switching unit 29 is finally determined to be the inside air circulation mode, and the inside / outside air switching unit 29 is set to the inside air circulation mode.

  Steps SB9 to SB12 constitute final mode determination means for setting the inside / outside air switching unit 29 to the inside air circulation mode when the inside air circulation mode is selected in at least one of step SB6 and step SB8. .

  Next, the operation of the air conditioner 1 configured as described above will be specifically described. For example, when the temperature of the passenger compartment that has been left under the hot weather in the summer is lowered to the set temperature, the air temperature in both zones Dr and Ps is about the same as that immediately after the start of air conditioning. The opening degree of the mix door 46 and the passenger side air mix door 47 is set to 0% so that the maximum cooling capacity can be obtained.

  As time elapses, the temperature of the inside air temperature sensor 65 approaches the set temperature of the driver's seat side temperature setting switch 68. For example, when the difference between the temperature of the inside air temperature sensor 65 and the set temperature becomes, for example, about 8 ° C to 10 ° C. The opening degree of the driver seat side air mix door 46 becomes larger than 0%. Similarly, on the passenger seat side, the opening degree of the passenger seat side air mix door 47 becomes larger than 0% over time.

  At the timing when the opening degree of one of the driver seat side air mix door 46 and the passenger seat side air mix door 47 becomes larger than 0%, the air conditioning of the same temperature is applied to the driver seat zone Dr and the passenger seat zone Ps until then. Since the wind is supplied, the temperature of the passenger seat zone Ps is substantially the same as the temperature of the driver seat zone Dr, that is, the temperature detected by the inside air temperature sensor 65. Therefore, at the timing when the opening degree of one air mix door becomes larger than 0%, the target temperature of the conditioned air supplied to the passenger seat zone Ps is the temperature detected by the inside air temperature sensor 65 and the passenger seat side temperature setting switch. On the other hand, the target temperature of the conditioned air supplied to the driver's seat zone Dr is the air conditioning including the temperature of the inside air temperature sensor 65 and the temperature of the driver's seat side temperature setting switch 68. Determined by conditions. Thereby, when the set temperatures are different between the driver's seat side and the passenger seat side, the difference between the temperature of the conditioned air supplied to the driver's seat zone Dr and the temperature of the conditioned air supplied to the passenger's seat zone Ps is different. Thus, the individual air conditioning is substantially started. In the winter season, the individual air conditioning of the driver's seat zone Dr and the passenger seat zone Ps is substantially started after a predetermined time has elapsed since the start of air conditioning.

  During the individual air conditioning, the control device 30 uses the temperature of the air in the driver's seat zone Dr and the target temperature for driver's seat side temperature adjustment calculated using at least the set temperature of the driver's seat side temperature setting switch 68. It is possible to obtain how far the temperature of the air in the driver's seat zone Dr is from the target temperature for adjusting the driver's seat side temperature as the air conditioning state of the driver's seat zone Dr. The air-conditioning state of the driver's seat zone Dr affects the temperature of the air in the passenger's seat zone Ps when the set temperatures of the driver's seat side temperature setting switch 68 and the passenger's seat side temperature setting switch 69 are different. .

  Further, since the temperature of the conditioned air blown to the passenger seat zone Ps is determined to be the target temperature for passenger seat side temperature adjustment calculated using the set temperature of the passenger seat side temperature setting switch 69, this setting is performed. The temperature affects the temperature of the air in the passenger seat zone Ps. That is, the temperature of the air in the passenger seat zone Ps is driven by the driver seat side temperature adjustment target temperature calculated using the set temperature of the driver seat side temperature setting switch 68 and the temperature detected by the inside air temperature sensor 65. It changes depending on the air conditioning state of the seat zone Dr and the target temperature for adjusting the passenger side temperature calculated using the set temperature of the passenger side temperature setting switch 69. The temperature estimation unit 91 estimates the temperature of the passenger seat zone Ps based on temperature estimation information including the temperatures of the driver seat side temperature setting switch 68, the inside air temperature sensor 65, and the passenger seat temperature setting switch 69. Even if a temperature sensor is not provided in the seat zone Ps, the temperature of the air in the passenger seat zone Ps can be estimated with an accuracy that can be used for air conditioning control.

  The temperature estimation unit 91 obtains an estimated temperature of the passenger seat zone Ps after the individual air conditioning is substantially started. Then, the control device 30 removes the temperature of the inside air temperature sensor 65 from the air-conditioning condition for determining the temperature adjustment target temperature of the passenger seat zone Ps, and incorporates the temperature estimated by the temperature estimation unit 91 to incorporate the temperature adjustment target temperature. To decide.

  Further, in this air conditioner 1, when the AUTO switch 71 is ON, the blowing mode is automatically set according to the opening degree of the driver side air mix door 46 and the passenger side air mix door 47. It has become. For example, when both the air mix doors 46 and 47 are opened at about 55% or more during heating and the temperature of the conditioned air is high, the blowing mode is set to the foot mode. When the air-mix doors 46 and 47 are both opened at about 35% or less during cooling and the temperature of the conditioned air is low, the blowing mode is set to the vent mode. Moreover, when the opening degree of both the air mix doors 46 and 47 is about 45%, the blowing mode is set to the bi-level mode.

  When the opening degree of both the air mix doors 46 and 47 is different, the average opening degree of both the air mixing doors 46 and 47 is obtained, and the blow-out mode is set by this average opening degree. That is, when the opening degree of the driver side air mix door 46 is about 37% and the opening degree of the passenger side air mix door 47 is about 31%, the average opening degree is about 34%, and the blowing mode is the vent mode. It becomes. As a result, it is possible to avoid an unpleasant blowing mode for passengers in both zones Dr and Ps. Note that the opening degrees of the driver seat side air mix door 46 and the passenger seat side air mix door 47 described here are merely examples, and can be set to arbitrary values when determining the blowing mode.

  The mode of the inside / outside air switching unit 29 is determined as described above. That is, when the set temperature set by the driver seat side temperature setting switch 68 is set to a low value of about 20 ° C., for example, when the temperature detected by the outside air temperature sensor 66 is high, such as under the hot weather in the summer, When the amount of solar radiation is large, the cooling of the driver's seat zone Dr is strongly required, and the target temperature for controlling the inside / outside air switching control on the driver's seat side becomes high. As shown in the graph of FIG. 8, when the target temperature RFTtrgDr for inside / outside air switching control on the driver's seat side increases, the switching temperature TrecDr decreases. When the switching temperature TrecDr is lowered, the inside air circulation mode is selected in order to improve the cooling efficiency, as shown in FIG.

  Further, when the temperature set by the driver's seat side temperature setting switch 68 is set to a level that is higher than, for example, 27 ° C. and does not require cooling, when the temperature detected by the outside air temperature sensor 66 is low, When the amount of solar radiation is small, the occupant in the driver's seat zone Dr does not want strong cooling, and the target temperature for control of inside / outside air switching on the driver's seat side becomes low. As shown in the graph of FIG. 8, when the inside / outside air switching control target temperature RFTtrgDr on the driver's seat side decreases, the switching temperature TrecDr increases, and the inside / outside air corresponding to the driver's seat zone Dr is based on the switching temperature TrecDr. The mode of the switching unit 29 is selected. The mode of the inside / outside air switching unit 29 corresponding to the passenger seat zone Ps is also selected in the same manner.

  When at least one of the two modes selected as described above is the inside air circulation mode, the mode of the inside / outside air switching unit 29 is the inside air circulation mode. As a result, the cooling efficiency of the air conditioner 1 can be increased when at least one passenger in the driver's seat zone Dr and the passenger seat zone Ps desires stronger cooling. In other cases, the mode of the inside / outside air switching unit 29 is the outside air introduction mode.

  The operating state of the compressor is set by a driver seat side compressor control target temperature calculated using at least the set temperature set by the driver seat side temperature setting switch 68 and at least by the passenger seat side temperature setting switch 69. It is set by the compressor control target temperature on the passenger seat side calculated using the set temperature.

  For example, if the calculated value of the target temperature for compressor control on the driver's side and the calculated value of the target temperature for compressor control on the passenger's seat are small and low-temperature conditioned air is required, increase the compressor operating time. The maximum cooling capacity of the refrigeration cycle can be obtained. If the calculated value of the target temperature for compressor control on the driver's side and the calculated value of the target temperature for compressor control on the passenger's side are not so low and weaker cooling is acceptable, shorten the compressor operating time and cool the refrigeration cycle. Try to reduce ability. On the other hand, if the calculated value of the target temperature for compressor control on the driver's side is different from the calculated value of the target temperature for compressor control on the passenger's side, the average value of both target temperatures is obtained and the compressor is calculated based on this average value. The operation time of is set. The operation time of the compressor is substantially the same as the connection time of the electromagnetic clutch 90, and the cooling capacity of the refrigeration cycle is changed by the control of the electromagnetic clutch 90.

  The operation time of the compressor may be set at the compressor control target temperature on the driver's seat side without using the compressor control target temperature on the passenger seat side. As a result, the cooling capacity of the refrigeration cycle can be set with priority given to the driver's seat zone Dr. Further, the operation time of the compressor may be set based on the set temperature of the driver seat side temperature setting switch 68 and the passenger seat side temperature setting switch 69 which is operated to the low temperature side by the passenger. As a result, it is possible to increase the cooling capacity by extending the operation time of the compressor in accordance with a zone where strong cooling is required.

  Further, the operation time of the compressor may be changed based on the lower target temperature of the compressor control target temperature on the driver seat side and the compressor control target temperature on the passenger seat side. As a result, the refrigeration cycle can be operated in accordance with a zone where low-temperature conditioned air is required, and conditioned air at a desired temperature can be obtained.

  In addition, it takes time until the temperature of the conditioned air blown to the driver's seat zone Dr changes after the driver's seat side temperature setting switch 68 is operated, and even if the temperature of the conditioned air changes, the air in the driver's seat zone Dr changes. The temperature gradually changes with a delay. The air temperature in the passenger seat zone Ps affected by the temperature in the driver seat zone Dr gradually changes with a delay. Similarly, when the set temperature of the passenger seat side temperature setting switch 69 is changed, the temperature of the passenger seat zone Ps gradually changes with a delay. In the control device 30, as described in step SA6 of the flowchart, even if both the temperature setting switches 68 and 69 are operated, the set temperature is not used as it is for estimating the temperature of the passenger seat zone Ps, but a time delay is caused. It is made to use after processing to give. Thereby, it becomes possible to estimate the temperature of the air in the zone Ps corresponding to the situation in which the temperature of the air in the passenger seat zone Ps changes.

  Further, for example, when the change in the set temperature is large, such as when the driver's seat passenger feels uncomfortable in the air-conditioning state and the set temperature is changed by 2 ° C. or more by the driver's seat side temperature setting switch 68, The air temperature will be large and change quickly. The temperature of the air in the passenger seat zone Ps affected by the driver seat zone Dr is also large and rapidly changes. In addition, for example, when the passenger in the passenger seat feels uncomfortable in the air-conditioning state, the amount of change in the set temperature similarly increases, and in this case, the temperature of the air in the passenger seat zone Ps is large and changes quickly. Become. Therefore, in the control device 30, when the set temperature change process in step SA6 is performed, when the change amount of the set temperature is large, the control device 30 can approach the vicinity of the changed temperature in a short time compared to the case where the change amount is small. (Indicated by a two-dot chain line in FIG. 6).

  Further, when there is a difference between the set temperature of the driver seat side temperature setting switch 68 and the set temperature of the passenger seat side temperature setting switch 69, the passenger seat zone Ps is strongly influenced by the driver seat zone Dr. Since the temperature estimation information includes the difference between the setting temperature of the driver seat side temperature setting switch 68 and the setting temperature of the passenger seat side temperature setting switch 69, the magnitude of the influence of the passenger seat zone Ps from the driver seat zone Dr. It is possible to estimate the temperature of the zone corresponding to When obtaining this difference, the setting temperature of the driver's seat side temperature setting switch 68 is subtracted from the setting temperature of the passenger's seat side temperature setting switch 69, so that the setting temperature of the driver's seat side temperature setting switch 68 is used as a reference. Thus, it is possible to obtain how high or low the set temperature of the passenger seat side temperature setting switch 69 is.

  Further, the control device 30 changes the time for the temperature before the change in the set temperature changing process to approach the vicinity of the temperature after the change so as to correspond to the air-conditioning air quantity changed by the air quantity changeover switch 73. That is, when the air-conditioning air volume is large, the air in the passenger compartment greatly flows, so that the air in the driver's seat zone Dr and the air in the passenger's seat zone Ps are easily mixed, and the passenger's seat zone Ps strengthens the influence of the driver's seat zone Dr. Will receive. On the other hand, if the air-conditioning air volume is decreased by the air volume switching switch 73, the passenger seat zone Ps is weakly affected by the driver seat zone Dr. Therefore, when the air volume is large, the time for the set temperature changing process is shortened, and when the air volume is small, the time is increased. Thereby, the delay time required for the temperature of the passenger seat zone Ps to start changing after the set temperature has changed can be set in accordance with the strength of the influence that the passenger seat zone Ps receives from the driver seat zone Dr. As a result, the temperature of the passenger seat zone Ps can be obtained with high accuracy.

  In addition, the correction coefficient H used when estimating the temperature of the passenger seat zone Ps in the above equation is changed to a value corresponding to the switched blowing mode. That is, when the blowing mode is the vent mode, the conditioned air blown out from the driver-side vent ports 5 and 6 and the conditioned air blown out from the passenger-side vent ports 7 and 8 are likely to be mixed. On the other hand, when the blow-out mode is the foot mode, the conditioned air blown from the foot duct 52 on the driver seat side and the conditioned air blown from the foot duct 56 on the passenger seat side are mixed due to the presence of the floor tunnel, the center console 10 and the like. Hateful. Thus, the blowing mode indicates the air conditioning state of the passenger compartment, and the strength of the influence on the passenger seat zone Ps from the driver's seat zone Dr differs depending on the blowing mode. To make the difference in the set temperature easy to appear in the estimated temperature, and when in the foot mode, the correction coefficient H is reduced to make the difference in the set temperature difficult to appear in the estimated temperature. It can be obtained with high accuracy.

  In addition, the correction coefficient H in the above equation is changed to a value corresponding to the outside air temperature detected by the outside air temperature sensor 66. That is, the outside air temperature affects the air conditioning state of the passenger compartment. If the outside air temperature is significantly different from the air temperature in the driver seat zone Dr, the outside air temperature is based on the air temperature in the driver seat zone Dr. The temperature of the air in the passenger seat zone Ps to be estimated is strongly influenced by the outside air temperature. On the other hand, if the difference between the outside air temperature and the temperature of the air in the driver's seat zone Dr is small, the temperature of the air in the passenger seat zone Ps to be estimated based on the temperature of the air in the driver's seat zone Dr is equal to the outside air temperature. It will be almost unaffected. Corresponding to the influence of the outside air temperature, if the difference between the outside air temperature and the inside air temperature is large, the correction coefficient H is increased to make the difference in the set temperature easily appear in the estimated temperature, and if the difference is small, the correction coefficient H is set. Decrease so that the difference in the set temperature does not appear in the estimated temperature.

  The correction coefficient H is changed to a value corresponding to the air conditioning air volume. When the air-conditioning air volume is large and the passenger seat zone Ps is strongly influenced by the driver's seat zone Dr, the correction coefficient H is increased to make the difference in the set temperature easily appear in the estimated temperature, and the air-conditioning air volume is small and the passenger seat zone Ps. Is hardly affected by the driver's seat zone Dr, the correction coefficient H is decreased to make it difficult for the difference in the set temperature to appear in the estimated temperature, so that the temperature of the passenger seat zone Ps can be obtained with high accuracy. Become.

  In addition, when the temperature detected by the inside air temperature sensor 65 changes, the control device 30 has a first process for bringing the temperature before the change closer to the temperature after the change over the time t1, as shown in FIG. The second process of bringing the temperature before the change closer to the vicinity of the temperature after the change over time t2 longer than t1 is performed. FIG. 12 shows a case where the detected temperature of the inside air temperature sensor 65 changes from 20 ° C. to 22 ° C.

  And the said control apparatus 30 determines the target temperature for temperature adjustment by the side of a driver's seat using the temperature obtained by the 1st process, and operates the driver's seat side air mix door 46. FIG. Thereby, for example, when the temperature detected by the inside air temperature sensor 65 changes suddenly, the temperature can be adjusted smoothly. In addition, when the temperature of the driver's seat zone Dr changes, the temperature of the air in the passenger seat zone Ps does not change immediately but gradually changes with a delay. The temperature estimation unit 91 estimates the temperature of the passenger seat zone Ps using the temperature obtained in the second process. This makes it possible to perform air conditioning that reflects changes in the temperature state in the actual passenger compartment.

  The control device 30 keeps the temperature value once estimated in the passenger seat zone Ps and prohibits the update until a predetermined holding time elapses after the driver-side temperature setting switch 68 is operated. Yes. That is, even if the set temperature on the driver's seat side is changed, the temperature in the driver's seat zone Dr does not change immediately, and the temperature in the actual passenger compartment is maintained by holding the temperature value corresponding to this. It becomes possible to perform air conditioning reflecting the change of the state. Similarly, when the passenger seat side temperature setting switch 69 is operated, the estimated temperature value of the passenger seat zone Ps is held until a predetermined holding time elapses.

  Also, when the set temperature is changed, the smaller the air-conditioning air volume, the less likely the air temperature in each zone Dr, Ps changes. Therefore, the lower the air-conditioning air volume, the higher the air-conditioning air volume. You may lengthen the time. In addition, when the blowing mode is, for example, the vent mode or the foot mode, the air temperature in each of the zones Dr and Ps changes after the set temperature is changed in the foot mode. Since the required time becomes long, the holding time may be extended in the foot mode so as to correspond to the air conditioning state of the passenger compartment.

  As described above, according to the air conditioner 1 according to this embodiment, the temperature of the passenger seat zone Ps is determined based on the temperature estimation information including the temperature detected by the inside air temperature sensor 65 arranged in the driver seat zone Dr. When estimating and selecting the mode of the inside / outside air switching unit 29 corresponding to the passenger seat zone Ps, the estimated temperature of the passenger seat zone Ps is used. For this reason, the mode of the inside / outside air switching unit 29 suitable for the passenger seat zone Ps can be selected without disposing the inside air temperature sensor 65 in the passenger seat zone Ps, and an increase in the cost of the air conditioner 1 can be avoided. Can do. Furthermore, when the inside air circulation mode is selected at least one of the mode of the inside / outside air switching unit 29 corresponding to the driver seat zone Dr and the mode of the inside / outside air switching unit 29 corresponding to the passenger seat zone Ps, the inside / outside air The switching unit 29 can be set to the inside air circulation mode. Thereby, when at least one of the passenger in the driver's seat zone Dr and the passenger in the passenger seat zone Ps desires stronger cooling, the cooling efficiency of the air conditioner 1 can be increased, and comfortable air conditioning can be realized. Can do.

  In addition, since the outside temperature of the passenger compartment is included in the calculation conditions for the target temperature RFTtrgDr for the inside / outside air switching control on the driver's seat side and the target temperature RFTtrgPs for the inside / outside air switching control on the passenger seat side, these target temperatures RFTtrgDr and RFTtrgPs are A more appropriate temperature reflecting the temperature outside the passenger compartment can be achieved. Furthermore, since the amount of solar radiation is included in the calculation conditions of the target temperature RFTtrgDr for inside / outside air switching control on the driver's seat side and the target temperature RFTtrgPs for inside / outside air switching control on the passenger seat side, these target temperatures RFTtrgDr and RFTtrgPs The temperature can be more appropriate to reflect the above.

  In this air conditioner 1, the temperature of the conditioned air blown to the driver's seat zone Dr changes according to the temperature set by the driver's seat side temperature setting switch 68, and the passenger seat zone Ps changes according to the temperature set by the passenger's seat side temperature setting switch 69. The temperature of the conditioned air that blows out will change. Therefore, the temperature of the air in the passenger seat zone Ps depends on the air conditioning state of the driver seat zone Dr according to the temperature of the conditioned air blown out from the driver seat side passage 41 and the temperature detected by the inside air temperature sensor 65, and from the passenger seat side passage 42. It is possible to estimate based on the temperature of the conditioned air blown out. In this case, when there is a difference between the temperature of the conditioned air blown from the driver seat side passage 41 and the temperature of the conditioned air blown from the passenger seat side passage 42, the passenger seat zone Ps is strongly influenced by the driver seat zone Dr. By including the difference between the temperature of the conditioned air blown out from the driver seat side passage 41 and the temperature of the conditioned air blown out from the passenger seat side passage 42 in the temperature estimation information, the passenger seat zone Ps is strongly influenced from the driver seat zone Dr. Accordingly, the temperature can be estimated, and the temperature of the air in the passenger seat zone Ps can be estimated with high accuracy.

  Further, the amount of heat supplied to the driver's seat changes as the temperature of the conditioned air blown to the driver's seat zone Dr changes according to the temperature set by the driver's seat side temperature setting switch 68. Further, the amount of heat supplied to the passenger seat changes as the temperature of the conditioned air blown to the passenger seat zone Ps changes according to the temperature set by the passenger seat side temperature setting switch 69. Accordingly, the temperature of the air in the passenger seat zone Ps can be estimated based on the air conditioning state of the driver seat zone Dr based on the driver seat supplied heat amount and the temperature detected by the inside air temperature sensor 65, and the passenger seat supplied heat amount. It is. In this case, if there is a difference between the amount of heat supplied to the driver's seat and the amount of heat supplied to the passenger seat, and the amount of heat supplied to each zone Dr, Ps is different, the passenger seat zone Ps is influenced by the driver's seat zone Dr. Take it stronger. By including the difference between the driver's seat supply heat amount and the passenger seat supply heat amount in the temperature estimation information, it is possible to estimate the air temperature corresponding to the strength of the influence of the passenger seat zone Ps from the driver seat zone Dr. Thus, the temperature of the air in the passenger seat zone Ps can be estimated with high accuracy.

  In this embodiment, the first air conditioning zone is the driver's seat zone Dr and the second air conditioning zone is the passenger seat zone Ps. However, the present invention is not limited to this, and the first air conditioning zone is the passenger seat zone Ps. The zone may be the driver's seat zone Dr. Further, the front zone of the passenger compartment may be the first air conditioning zone and the rear zone may be the second air conditioning zone.

  Further, in this embodiment, the inside / outside air switching door 27 and the air mix doors 46 and 47 are constituted by plate-like doors, but may be constituted by a film-like opening / closing member, for example.

  In this embodiment, the solar radiation sensor 67 is directional. However, a solar radiation sensor dedicated to the driver's seat zone and a solar radiation sensor dedicated to the passenger seat zone may be provided in the passenger compartment. .

  As described above, the vehicle air conditioner according to the present invention can be used, for example, to individually air-condition the driver's seat side and the passenger seat side of the passenger compartment of an automobile.

It is a figure explaining the schematic structure of the air conditioner of this invention. It is a perspective view of the interior of a vehicle equipped with an air conditioner. It is a block diagram of a control apparatus. It is a flowchart explaining the process at the time of estimating the temperature of the passenger seat zone P. FIG. It is a figure which shows the value obtained by performing a delay process and a control value calculation process to the temperature detected with the internal temperature sensor. It is a figure which shows the value obtained by performing a preset temperature change process to the preset temperature set with the driver's seat side temperature setting switch. It is a flowchart explaining the process at the time of determining the mode of an inside / outside air switching part. It is a graph used when calculating | requiring the temperature used as the switching point of the mode of the inside / outside air switching part in a driver's seat zone. It is a figure explaining the switching point of the mode of the inside / outside air switching part in a driver's seat zone. It is a graph used when calculating | requiring the temperature used as the switching point of the mode of the inside / outside air switching part in a passenger seat zone. It is a figure explaining the switching point of the mode of the inside / outside air switching part in a passenger seat zone. It is a figure which shows the value obtained by performing a 1st process and a 2nd process to the temperature detected with the internal temperature sensor.

DESCRIPTION OF SYMBOLS 1 Air conditioner 20 Casing 25 Inside air introduction port 26 Outside air introduction port 27 Inside / outside air switching door 28 Inside / outside air switching door actuator 29 Inside / outside air switching unit 30 Control device 35 Refrigerant evaporator 37 Evaporator temperature sensor 41 Driver's seat passage (first passage)
42 Passenger seat passage (second passage)
43 Heater core 44 Bypass passage on driver side 45 Bypass passage on passenger side 46 Driver's seat air mix door 47 Passenger's seat air mix door 48 Driver's seat side air mix door actuator 49 Passenger's seat side air mix door actuator 52 Driver's seat side foot duct 58 Passenger side foot duct 60 Outlet switching actuator 65 Inside air temperature sensor (inside air temperature detecting means)
66 Outside temperature sensor (outside temperature detection means)
68 Driver side temperature setting switch (first temperature setting means)
69 Passenger side temperature setting switch (second temperature setting means)
91 Temperature estimation part (temperature estimation means)
Dr driver's seat zone (first air conditioning zone)
Ps Passenger seat zone (second air conditioning zone)
RFTtrgDr Target temperature for control of inside / outside air on the driver side RFTtrgPs Target temperature for inside / outside air switching control on the passenger side

Claims (3)

A casing having a first passage and a second passage corresponding respectively to the first air-conditioning zone and the second air-conditioning zone in the passenger compartment is provided, and the conditioned air generated for each air-conditioning zone in the casing is sent to the first passage and the second passage. In the vehicle air conditioner configured to supply from the passage to the first air conditioning zone and the second air conditioning zone,
An inside / outside air switching means that is provided in the casing and switches between an inside air circulation mode in which the air introduced into the first passage and the second passage is air in the vehicle interior, and an outside air introduction mode in which the air outside the vehicle compartment is air;
First temperature setting means for a passenger to set the temperature of the first air conditioning zone;
Second temperature setting means for the passenger to set the temperature of the second air conditioning zone;
Inside air temperature detection means arranged in the first air conditioning zone;
Based on temperature estimation information including the temperature detected by the inside air temperature detection means, estimation means for estimating the temperature of the second air conditioning zone;
First target temperature calculation means for calculating a control target temperature of the inside / outside air switching means based on a calculation condition including the temperature set by the first temperature setting means;
Second target temperature calculation means for calculating a control target temperature of the inside / outside air switching means based on a calculation condition including the temperature set by the second temperature setting means;
First mode selection means for selecting a mode of the inside / outside air switching means based on the control target temperature calculated by the first target temperature calculation means and the temperature detected by the inside air temperature detection means;
Second mode selection means for selecting a mode of the inside / outside air switching means based on the control target temperature calculated by the second target temperature calculation means and the temperature of the second air conditioning zone estimated by the estimation means; ,
When at least one of the first mode selection means and the second mode selection means selects the inside air circulation mode, the inside / outside air switching means is set to the inside air circulation mode, while the first mode selection means and the second mode selection means A final mode determining means for setting the inside / outside air switching means to the outside air introduction mode when both the mode selection means and the outside air introduction mode are selected ,
A vehicle air conditioner configured to perform air conditioning in a mode selected by the final mode determining means . In the vehicle air conditioner according to claim 1,
An outside air temperature detecting means for detecting the temperature outside the passenger compartment,
The vehicle air conditioner characterized in that the calculation conditions of the first target temperature calculation means and the second target temperature calculation means include the temperature detected by the outside air temperature detection means. The vehicle air conditioner according to claim 1 or 2,
It has a solar radiation amount detecting means for detecting the solar radiation amount,
The vehicle air conditioner characterized in that the calculation conditions of the first target temperature calculation means and the second target temperature calculation means include the amount of solar radiation detected by the solar radiation amount detection means.

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