JP6537790B2 - Vehicle air conditioner - Google Patents

Description

  The present invention relates to a vehicle air conditioner mounted on, for example, an automobile or the like.

  Heretofore, this type of vehicle air conditioner is configured to be able to select the air in the passenger compartment (inside air) and the air outside the passenger compartment (outside air) and introduce it into the air conditioning casing. In addition, after the temperature of the introduced air is adjusted by a heat exchanger or the like, it is blown out to the vehicle compartment from a selected blowout out of a defroster blowout, a vent blowout and a heat blowout formed on the air conditioning casing. It has become.

  The air conditioners for vehicles of Patent Documents 1 and 2 introduce the inside air and adjust the temperature, and then the inside air circulation mode for supplying the inside of the vehicle compartment, and the outside air introduction mode for introducing the outside air and adjusting the temperature, and then supplying the inside of the vehicle compartment And, after introducing both the inside air and the outside air and adjusting the temperature, it can be switched to three intake modes of the inside and outside air mixing mode to be supplied to the vehicle interior. Then, the automatic air conditioner control automatically sets the intake mode, the blowout mode, the air flow rate, the blowout temperature, etc. based on the condition outside the vehicle interior (vehicle interior temperature, outside air temperature, solar radiation amount) and the set temperature set by the occupant. It will be.

  In Patent Document 1, the introduction ratio of outside air and inside air can be changed in the inside / outside air mixing mode, and the inside air circulation mode is set if the humidity inside the vehicle measured by the humidity sensor is 20% or less, and the outside air introduction mode if 50% And

  In Patent Document 2, a determination means for determining whether the window glass is likely to be fogged is provided, and when the determination means determines that the window glass is not likely to be fogged, it circulates at least internal air and determines that the window glass is likely to be fogged. As the outside air introduction mode, the window glass is prevented from fogging. The control mode further includes a control mode for gradually increasing the amount of circulating internal air in the internal / external air mixing mode, a control mode for maintaining the ratio of internal air and external air, and a control mode for gradually increasing the amount of external air introduced in the internal / external air mixing mode. The control mode is selected based on the degree of fogging of the window glass. There is an advantage that the amount of energy required for heating can be reduced by reducing the amount of ventilation by increasing the amount of circulation of internal air within the range in which the window glass does not become cloudy.

Japanese Examined Patent Publication No. 1-27891 Patent No. 5152355

  In general auto air-conditioner control, the blowout mode is set so that warm air is blown out from the heat blowout port at the time of heating. The heat outlet is located near the feet of the occupant. Then, when warm air is blown out from the heat outlet when the interior of the vehicle is not sufficiently warmed up immediately after leaving the vehicle for a long time in winter to start heating, or when the outside air temperature is extremely low, When the mode is the inside / outside air mixing mode, the warm air blown out from the heat outlet is sucked into the air conditioning casing. Even in the other blowout mode, the warm air blown out from the blowout port is similarly sucked into the air conditioning casing.

  At this time, it is possible to raise the temperature of the warm air and increase the heating effect by increasing the amount of internal air circulation in the internal / external air mixture mode on desk examination, but in practice the air flow is generated in the internal / external air mixture mode Because warm air is immediately sucked into the air conditioning casing, the warm air is less likely to flow throughout the vehicle interior. In this case, the warm air does not reach the upper body of the occupant or the occupant in the rear seat, so that the occupant feels that heating is difficult to be effective. In particular, when the amount of internal air circulation in the internal / external air mixing mode is large, this problem becomes noticeable.

  The present invention has been made in view of such a point, and the object of the present invention is to provide a vehicle air conditioner having an inside / outside air mixing mode in which heating is effective even in a vehicle compartment which is not sufficiently warmed up. Make the crew feel like they are.

  In order to achieve the above object, in the present invention, the internal air circulation amount is reduced when it is determined that the occupant is in a cold state when the inside / outside air mixing mode can be selected.

The first invention is
An intake unit that changes the amount of air circulating in the vehicle compartment and the amount of air introduced outside the vehicle,
A temperature control unit for controlling the temperature of the air introduced from the intake unit;
An outlet direction switching unit that supplies conditioned air temperature-controlled by the temperature control unit to each part of the vehicle compartment;
It is configured to detect the ease of fogging of the window glass of the vehicle, and to increase the outside air introduction amount when the window glass is likely to be cloudy based on the detection result, while increasing the inside air circulation amount when the window glass is difficult to be fogged. An air conditioner for a vehicle provided with a controlled controller,
A cold related information detecting means for detecting information related to cold felt by the occupant, the cold related information detecting means comprising an inside air temperature sensor for detecting an air temperature inside the vehicle compartment and an outside air temperature for detecting an air temperature outside the vehicle outside A sensor, a solar radiation detection sensor for detecting the amount of solar radiation, and an occupant sensor for detecting whether or not an occupant is present at the rear seat disposed behind the front seat of the vehicle compartment, and to the upper body of the occupant Configured to detect air flow,
The control device determines whether the occupant is in a cold state or not by the cold / heat related information detecting means when introducing the air in the passenger compartment and the air outside the passenger compartment into the temperature control unit at the time of heating. When it is determined that the first internal air circulation amount set smaller than when it is determined that the situation is not cold is determined, and the air flow to the upper body of the occupant detected by the cold related information detecting means is small The second internal air circulation amount set so as to be substantially smaller is obtained, and when it is detected by the occupant sensor that there is an occupant in the rear seat, the third internal air circulation which is set smaller than the case where it is not detected. So as to control the intake section so that the amount of the first internal air circulation, the second internal air circulation, and the third internal air circulation is the smallest. To Made is characterized in that is.

  According to this configuration, since the air in the vehicle compartment is introduced into the temperature control unit at the time of heating to control the temperature, the amount of ventilation is reduced and the amount of energy consumption required for the heating can be reduced. Then, when it is determined that the occupant is in a cold state by the cooling / heating related information detecting means, the amount of circulating the inside air decreases, so it is possible to suppress that the blown warm air is immediately sucked into the temperature control unit. become. As a result, the warm air can easily flow to the entire vehicle interior, so the warm air can easily reach the upper body of the occupant and the occupant in the rear seat, and the occupant feels that heating is working.

  Further, by detecting the air temperature inside the vehicle compartment by the inside air temperature sensor, the atmosphere temperature of the occupant can be obtained directly, so it is possible to accurately determine whether the occupant is in a cold state. Further, it is possible to accurately determine whether the occupant feels cold by detecting the air temperature outside the vehicle using the outside air temperature sensor. Further, by detecting the amount of solar radiation by the solar radiation amount detection sensor, the atmosphere temperature of the occupant can be indirectly obtained. For example, if the amount of solar radiation is small, it can be determined that the occupant is likely to feel cold.

  Further, the amount of air blown during heating may make it easy for the occupant to feel cold. In this case, by reducing the amount of circulation of the inside air, warm air can easily flow throughout the vehicle interior. Thus, the warm air can easily reach the upper body of the occupant and the occupant in the rear seat, and the occupant feels that heating is working.

  In addition, when the occupant is in the rear seat, the warm air can easily reach the occupant in the rear seat by reducing the amount of circulation of the inside air, and the occupant in the rear seat feels that heating is working.

  In addition, by controlling the amount of circulation of internal air to be the smallest, the comfort of the occupant at the time of heating is enhanced.

A second invention relates to the first invention,
The cold-heat related information detection means is characterized in that it is configured to detect the amount of air blown into the vehicle compartment.

In a third aspect of the present invention, in the first or second aspect,
The cold-heat related information detection means is characterized in that it is configured to detect the blowing mode of the conditioned air.

The fourth invention is
An intake unit that changes the amount of air circulating in the vehicle compartment and the amount of air introduced outside the vehicle,
A temperature control unit for controlling the temperature of the air introduced from the intake unit;
An outlet direction switching unit that supplies conditioned air temperature-controlled by the temperature control unit to each part of the vehicle compartment;
It is configured to detect the ease of fogging of the window glass of the vehicle, and to increase the outside air introduction amount when the window glass is likely to be cloudy based on the detection result, while increasing the inside air circulation amount when the window glass is difficult to be fogged. An air conditioner for a vehicle provided with a controlled controller,
A cold related information detecting means for detecting information related to cold felt by the occupant, the cold related information detecting means comprising an inside air temperature sensor for detecting an air temperature inside the vehicle compartment and an outside air temperature for detecting an air temperature outside the vehicle outside A sensor, a solar radiation detection sensor for detecting the amount of solar radiation, and an occupant sensor for detecting whether or not an occupant is present at the rear seat disposed behind the front seat of the vehicle compartment, and to the upper body of the occupant Configured to detect air flow,
The control device determines whether the occupant is in a cold state or not by the cold / heat related information detecting means when introducing the air in the passenger compartment and the air outside the passenger compartment into the temperature control unit at the time of heating. When it is determined that the first internal air circulation amount set smaller than when it is determined that the situation is not cold is determined, and the air flow to the upper body of the occupant detected by the cold related information detecting means is small The second internal air circulation amount set so as to be substantially smaller is obtained, and when it is detected by the occupant sensor that there is an occupant in the rear seat, the third internal air circulation which is set smaller than the case where it is not detected. The amount is determined, and furthermore, it is detected whether or not the air in the vehicle compartment and the air outside the vehicle are switched to the inside / outside air mixing mode for introducing the air into the temperature control unit, and the switching to the inside / outside air mixing mode is When taking out, it is configured to control the intake section so as to be any one of the first internal air circulation amount, the second internal air circulation amount, and the third internal air circulation amount. It is characterized by being.

  According to this configuration, it is possible to reduce the amount of internal air circulation immediately after the mode is switched to the inside / outside air mixing mode, so the occupant feels that heating is working early.

The fifth invention is the fourth invention,
The cold-heat related information detection means is characterized in that it is configured to detect the amount of air blown into the vehicle compartment.

A sixth invention is according to the fourth or fifth invention,
The cold-heat related information detection means is characterized in that it is configured to detect the blowing mode of the conditioned air.

A seventh invention is according to any one of the first to sixth inventions,
It has a vehicle speed sensor that detects the speed of the vehicle,
The control device determines that the air outside the passenger compartment does not flow into the passenger compartment from the introduction port for introducing air into the passenger compartment, based on the vehicle speed detected by the vehicle speed sensor and the air flow to the passenger compartment. In this case, the intake unit is controlled to introduce the air inside the vehicle compartment and the air outside the vehicle compartment into the temperature control unit.

An eighth invention is according to any one of the first to sixth inventions,
The above-mentioned control device is a case where ventilation is stopped, and when the window glass is likely to be fogged, it is in an outside air introduction mode in which air outside the vehicle is introduced to the temperature control section. Is characterized in that it is configured to be in an internal air circulation mode for introducing the air in the vehicle compartment to the temperature control unit.

  According to the first aspect of the invention, the amount of internal air circulation is reduced when it is determined that the occupant is in a cold state at the time of heating, so the amount by which warm air once blown out is sucked into the temperature control unit can be reduced. . As a result, the warm air can easily flow through the entire cabin, so that even if the cabin is not sufficiently warmed up, the occupant can feel as if heating is working.

  In addition, using an inside air temperature sensor that detects the air temperature inside the vehicle compartment, an outside air temperature sensor that detects the air temperature outside the vehicle, and a sunshine amount detection sensor that detects the sunshine amount Can be determined accurately.

  In addition, since the amount of internal air circulation is reduced as the air flow to the upper body of the occupant decreases, the occupant can feel as if heating is effective even if the amount of warm air is small.

  Also, since the amount of air blown into the passenger compartment is detected, the amount of air blown into the upper body of the occupant can be detected relatively accurately and easily.

  Further, since the blowout mode is detected, the amount of air blown to the upper body of the occupant can be detected relatively accurately and easily.

  In addition, since the amount of inside air circulation is reduced when it is detected that there is a passenger in the rear seat, it is possible to make the passenger in the rear seat feel that heating is working.

  In addition, since the intake portion is controlled to be the smallest amount of the first internal air circulation amount, the second internal air circulation amount, and the third internal air circulation amount, the comfort of the occupant during heating can be enhanced. be able to.

  In addition, since the amount of internal air circulation can be reduced immediately after the mode is switched to the inside / outside air mixing mode, it is possible to make the occupants feel as if heating is working early.

  Further, when it is determined that the air outside the vehicle compartment does not flow into the vehicle compartment from the air inlet of the vehicle compartment based on the vehicle speed and the air flow to the vehicle compartment, the temperature of the air inside the vehicle compartment and the air outside the vehicle compartment Since the control unit is introduced to the control unit, the outside air does not flow into the vehicle compartment without temperature control, and it is possible to make it difficult for the occupant to feel discomfort.

  In addition, when the air flow is stopped, the outside air introduction mode is set when the window glass tends to be fogged, while the inside air circulation mode is set when the window glass is unlikely to be fogged. It can be compatible with sex in a high level.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the vehicle air conditioner which concerns on embodiment. It is a block diagram of a vehicle air conditioner. It is a flowchart which shows the control content by a control apparatus. It is a graph which calculates the 1st intake door amendment opening. It is a graph which calculates a 2nd intake door correction opening. It is a graph which calculates the 3rd intake door amendment opening. It is a flowchart which shows a part of control content which concerns on the modification 1. FIG. It is a flowchart which shows a part of control content which concerns on the modification 2. FIG.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the preferred embodiments is merely illustrative in nature, and is not intended to limit the present invention, its applications, or its applications.

  FIG. 1 is a schematic configuration diagram of a vehicle air conditioner 1 according to an embodiment of the present invention. The vehicle air conditioner 1 is mounted, for example, on a vehicle such as a car, and after introducing one or both of the air inside the vehicle compartment (inside air) and the air outside the vehicle compartment (outside air) to adjust the temperature, It is configured to supply each part of the cabin. Although not shown, a front seat including a driver's seat and a front passenger seat and a rear seat disposed behind the front seat are provided in a cabin of the vehicle.

  The vehicle air conditioner 1 includes an air conditioning casing 10 and a control device (shown in FIG. 2) 30. The air conditioning casing 10 is accommodated, for example, in an instrument panel (not shown) disposed at a front end of a vehicle compartment. The air conditioning casing 10 includes an intake portion 11, a temperature control portion 12, and a blowout direction switching portion 13 in order from the upstream side to the downstream side in the air flow direction. In the intake section 11, an outside air introduction port 11a and an inside air introduction port 11b are formed. The outside air introduction port 11a communicates with the outside of the vehicle via, for example, an intake duct (not shown), and introduces outside air. The inside air introduction port 11 b is opened inside the instrument panel to introduce inside air of the occupant's feet.

  Inside the intake unit 11, an intake door 11c for opening and closing the outside air introduction port 11a and the inside air introduction port 11b is disposed. The intake door 11 c can be formed of, for example, a plate-like member, and is rotatably supported on the side wall of the intake portion 11. The intake door 11c is driven by the inside / outside air switching actuator 11d to have an arbitrary rotation angle. Thus, the intake mode is switched. The inside and outside air switching actuator 11 d is controlled by the control device 30.

  For example, as shown by a solid line in FIG. 1, when the outside air introduction port 11a is fully closed and the intake door 11c is turned until the inside air introduction port 11b is fully opened, the intake mode becomes the inside air circulation mode. The opening degree of the intake door 11c at this time is 100%. On the other hand, as shown by an imaginary line in FIG. 1, when the outside air introduction port 11a is fully opened and the intake door 11c is rotated until the inside air introduction port 11b is fully closed, the intake mode becomes the outside air introduction mode. The opening degree of the intake door 11c at this time is 0%. Then, when the opening degree of the intake door 11c is between 1% and 99%, both the outside air inlet 11a and the inside air inlet 11b are opened, and both inside air and outside air are introduced into the temperature control unit 12. . This intake mode is an internal / external air mixing mode. In the inside / outside air mixing mode, the introduction ratio of inside air to outside air, that is, the inside air circulation amount and the outside air introduction amount are changed according to the opening degree of the intake door 11c. The details of the switching control of the intake mode will be described later.

  The intake unit 11 is provided with a blower 15. The blower 15 includes a fan 15a and a blower motor 15b that drives the fan 15a. After the inside air and / or the outside air is introduced into the intake unit 11 by the rotation of the fan 15 a, the air is blown to the temperature control unit 12. The blower motor 15b is configured to be able to adjust the number of revolutions per unit time by changing the voltage applied. The air blowing amount is changed according to the rotational speed of the blower motor 15b. Since the blower motor 15b is controlled by the control device 30, the control device 30 can indirectly obtain the blowing air volume of the conditioned air into the vehicle compartment based on the voltage applied to the blower motor 15b.

  The temperature control unit 12 is a portion for controlling the temperature of the air introduced from the intake unit 11. Inside the temperature control unit 12, a heat exchanger 16 for cooling, a heat exchanger 17 for heating, and an air mix door 18 are disposed. That is, inside the temperature control unit 12, a cold air passage R1 is formed on the upstream side in the air flow direction, and the cooling heat exchanger 16 is accommodated in the cold air passage R1. Further, the downstream side of the cold air passage R1 is branched into the hot air passage R2 and the bypass passage R3, and the heating heat exchanger 17 is accommodated in the hot air passage R2.

  The heat exchanger 16 for cooling can be comprised, for example with the refrigerant evaporator of a heat pump apparatus, but it is not restricted to this, What is necessary is just to be able to cool air. Moreover, although the heat exchanger 17 for a heating can be comprised, for example with the heater core etc. to which the cooling water of an engine is supplied, it is not restricted to this, for example, can heat air, such as an electric heater. It is good if it is something. Also, an electric heater can be added as an auxiliary heat source.

  The air mix door 18 is disposed between the cooling heat exchanger 16 and the heating heat exchanger 17, and opens and closes the upstream end of the warm air passage R2 and the upstream end of the bypass passage R3. The air mix door 18 can be formed of, for example, a plate-like member, and is rotatably supported on the side wall of the temperature control unit 12. The air mix door 18 is driven by the air mix actuator 18 a to have an arbitrary rotation angle. The air mix actuator 18 a is controlled by the controller 30.

  When the air mix door 18 fully opens the upstream end of the hot air passage R2 and fully closes the upstream end of the bypass passage R3, all the cold air generated in the cold air passage R1 flows into the hot air passage R2 and is heated As a result, warm air flows into the blowout direction switching unit 13. On the other hand, when the air mix door 18 fully closes the upstream end of the warm air passage R2 and fully opens the upstream end of the bypass passage R3, all the cold air generated in the cold air passage R1 flows into the bypass passage R3. The cold air flows into the blowing direction switching unit 13. When the air mix door 18 is in a rotational position where the upstream end of the hot air passage R2 and the upstream end of the bypass passage R3 are open, the cold air and the hot air flow into the blowing direction switching unit 13 in a mixed state. The amount of cold air and the amount of warm air flowing into the blowout direction switching unit 13 are changed according to the rotational position of the air mix door 18, and conditioned air of a desired temperature is generated. The air mix door 18 is not limited to the above-described plate-like door, and may have any configuration as long as it can change the amount of cold air and the amount of warm air. For example, it may be a rotary door or a film door. Moreover, the structure of temperature control does not need to be a structure mentioned above, and should just be the structure which can change cold air volume and warm air volume.

  The blowing direction switching unit 13 is a portion for supplying the conditioned air whose temperature has been adjusted by the temperature adjustment unit 12 to each part of the vehicle compartment. The blowout direction switching unit 13 is formed with a defroster blowout opening 21, a vent blowout opening 22, and a heat blowout opening 23. The defroster air outlet 21 is connected to a defroster nozzle 24 formed in an instrument panel. The defroster outlet 21 is for supplying conditioned air to the interior surface of the windshield G (window glass). A defroster door 21 a for opening and closing the defroster vent 21 is provided in the defroster vent 21.

  The vent blower outlet 22 is connected to a vent nozzle 25 formed in an instrument panel. The vent nozzle 25 is for supplying conditioned air to the upper body of the front seat occupant, and is provided at the center in the vehicle width direction of the instrument panel and on both the left and right sides. Inside the vent outlet 22, a vent door 22a for opening and closing the vent outlet 22 is provided.

  The heat outlet 23 is connected to a heat duct 26 extending to the vicinity of the foot of the occupant. The heat duct 26 is for supplying conditioned air to the feet of the occupant. Inside the heat outlet 23, a heat door 23a for opening and closing the heat outlet 23 is provided.

  The defroster door 21a, the vent door 22a and the heat door 23a are driven by the blowout direction switching actuator 27 to open and close. The blowing direction switching actuator 2 is controlled by the control device 30. The defroster door 21a, the vent door 22a and the heat door 23a are interlocked via a link (not shown). For example, the defroster mode, the defroster mode in which the vent door 22a and the heat door 23a are closed when the defroster door 21a is open. The vent mode in which the vent door 22a is opened with the door 21a and the heat door 23a closed, the heat mode in which the heat door 23a is opened with the defroster door 21a and the vent door 22a closed, and the defrost door 21a and the vent door 22a opened. In the defrost mode in which the heat door 23a is closed, the blower door 22a is switched on in the open state, and the blower door 22a is closed, and the blower door is switched to any blow mode among a plurality of blow modes such as bilevel mode. That.

  As shown in FIG. 2, the vehicle air conditioner 1 includes an outside air temperature sensor 31, an inside air temperature sensor 32, a solar radiation amount sensor 33, a cooling water temperature sensor 34, an evaporator sensor 35, a front window temperature sensor 36, and a front window near temperature sensor. Reference numeral 37 denotes a humidity sensor 38 near the windshield, an operation switch 39, an occupant sensor 40, and a vehicle speed sensor 41. The sensors 31 to 38, 40 and 41 are connected to the control device 30 and output signals to the control device 30. Further, the operation switch 39 is also connected to the control device 30, so that the control device 30 can detect the operation state by the occupant.

  The outside air temperature sensor 31 is disposed, for example, at the front or side of the vehicle outside the vehicle, and detects an air temperature (outside air temperature) around the vehicle. The inside air temperature sensor 32 is disposed, for example, in the vicinity of an instrument panel in a vehicle compartment, and detects an air temperature (inside air temperature) inside the vehicle compartment. The solar radiation amount sensor 33 is disposed, for example, in the vicinity of an instrument panel in a vehicle compartment, and detects the amount of solar radiation irradiated to the vehicle compartment.

  The inside air temperature sensor 32, the outside air temperature sensor 31, and the solar radiation amount sensor 33 constitute cold-heat related information detection means for detecting information related to cold heat felt by the occupant. That is, the inside air temperature output from the inside air temperature sensor 32 is a temperature substantially equal to the atmosphere temperature of the occupant, a high inside air temperature indicates that the occupant is warm, and a low inside air temperature indicates that the occupant is cold. . If the outside air temperature output from the outside air temperature sensor 31 is high, the occupant feels warm, and if the outside air temperature is low, the occupant feels cold. Furthermore, when the amount of solar radiation output from the solar radiation amount sensor 33 is large, the occupant feels warm, and when the amount of solar radiation is small, the occupant feels cold.

  The cooling water temperature sensor 34 detects the temperature of the cooling water of the engine mounted on the vehicle, and the cooling water temperature sensor 34 estimates the temperature of the cooling water of the engine flowing into the heat exchanger 17 for heating. be able to. The evaporator sensor 35 is disposed downstream of the cooling heat exchanger 16 in the air flow direction, and detects the surface temperature of the cooling heat exchanger 16.

  The windshield temperature sensor 36 is disposed on the interior surface of the windshield G to detect the temperature of the interior surface of the windshield G. The windshield vicinity temperature sensor 37 is disposed in the vicinity of the inner surface of the windshield G away from the interior surface of the windshield G to detect the temperature in the vicinity of the interior surface of the windshield G. The windshield vicinity humidity sensor 38 is disposed in the vicinity of the inner surface of the windshield G away from the interior surface of the windshield G to detect the humidity in the vicinity of the interior surface of the windshield G.

  The operation switch 39 is disposed, for example, on an instrument panel or the like, and is, for example, a switch for switching the air conditioner 1 on / off, an air flow switch for increasing or decreasing the air flow, a temperature setting switch for setting the temperature of the cabin, It comprises an inside / outside air switching switch that switches inside air circulation, outside air introduction, and inside / outside air mixing modes, an auto switch that selects whether or not to perform automatic air conditioner control, a blowout mode switch switch that switches blowout direction, a defroster switch, and the like.

  The occupant sensor 40 can detect whether an occupant is seated in the front seat and can also detect whether an occupant is seated in the rear seat. Specifically, for example, pressure sensors are built in the front and rear seat cushions, respectively, and it is possible to detect whether the occupant is seated or not by the pressure sensors. In addition, since a sensor that detects whether or not the front and rear seat belts are in a mounted state is provided in a general vehicle, the occupant can be seated if the seat belt is mounted using this sensor You can detect what you are doing. The vehicle speed sensor 41 can detect the speed of the vehicle, and can use conventionally known sensors.

  The control device 30 switches the inside / outside air switching actuator 11 d, the air mix actuator 18 a, and the blowing direction based on the signals (output values) output from the sensors 31 to 38, 40, 41 and the operation state of the operation switch 39. The actuator 27 and the blower motor 15b are controlled. That is, when the automatic air conditioner control is selected by the auto switch of the operation switch 39, the temperature outside the vehicle, the temperature inside the vehicle compartment, the amount of solar radiation, the temperature of the engine coolant, the surface temperature of the heat exchanger 16 for cooling, the set temperature While determining the target blowing temperature of the conditioned air supplied to the vehicle interior based on the above, the opening degree of the air mix door 18 is calculated so that the target blowing temperature is achieved, and the air mixing door 18 becomes this opening degree As described above, the air mix actuator 18 a is controlled to rotate the air mix door 18. Thereby, the temperature of the conditioned air becomes the target blowing temperature.

  Further, the control device 30 controls the blowout direction switching actuator 27 so that the blowout mode is mainly in the vent mode during cooling, and controls the blowout direction switching actuator 27 such that the blowout mode is mainly in the heat mode during heating. . Further, in the case of weakening even at the time of cooling or heating, the blowout direction switching actuator 27 is controlled to be in the bi-level mode or the defvent mode. Furthermore, when the defroster switch of the operation switch 39 is turned ON, the blowout direction switching actuator 27 is controlled so that the blowout mode becomes the defroster mode.

  For example, when heating is performed by a vehicle left for a long time in winter or when cooling is performed by a vehicle left for a long time in summer, the difference between the target blowing temperature and the inside air temperature becomes large. In such a case, the control device 30 controls the blower motor 15b so that the air volume is increased, but the occupant can operate the air volume switching switch so as to obtain a desired air volume. Further, in the automatic air-conditioner control, the blower motor 15b is controlled so that the air volume decreases as the difference between the target air outlet temperature and the inside air temperature decreases. The control of the blower motor 15b is performed by changing the applied voltage, but the invention is not limited to this, as long as the number of rotations of the blower motor 15b can be changed.

  The air flow to the upper body of the occupant can be detected by the control of the blower motor 15b by the control device 30 and the switching control of the blowout mode, and the control device 30 for performing this control is provided with the cooling / heating related information detecting means of the present invention. It is. That is, when the blowout mode is the vent mode, the conditioned air is mainly blown to the upper body of the occupant, and the voltage applied to the blower motor 15b in the vent mode is detected to the upper body of the occupant. The air flow can be detected. Further, in the heat mode, the amount of air blown to the upper body of the occupant as a whole is smaller than that in the vent mode, which can also be detected by the control device 30.

  Further, the control device 30 controls the inside / outside air switching actuator 11d according to the procedure of the flowchart shown in FIG. This control is repeated at a predetermined timing when the air conditioner 1 is turned on and the control device 30 determines that heating is required. At the time of cooling, basically, the inside / outside air switching actuator 11d is controlled to be in a mode selected by the occupant.

  In step SA1 after the start, the output values of the sensors 31 to 38, 40, 41 are read, and the operation state of the operation switch 39 is read. In step SA2 following step SA1, the blowout mode, air volume (voltage applied to blower motor 15b), and the degree of opening of air mix door 18 are determined as described above, and the operating state of the inside / outside air switching switch of operation switch 39 Determine the target intake mode from. The target intake mode is used in the control procedure to be described later, and the intake mode is not immediately switched to the target intake mode. When the inside / outside air switching switch selects the outside air introduction mode, the target intake mode is set to the outside air introduction mode, and when the inside air circulation mode is selected, the target intake mode is set to the inside air circulation mode, and inside / outside air is mixed When the mode is selected, the target intake mode is set to the inside / outside air mixing mode.

  Then, in step SA3, the target dew point temperature and the dew point temperature are calculated according to a known method.

  The target dew point temperature is lower than the temperature of the interior surface of the windshield glass G output from the windshield temperature sensor 36. For example, when the temperature of the interior surface of the windshield G is 10 ° C., a temperature about 2 to 3 ° C. lower than that is set as the target dew point temperature. Also, based on the temperature near the interior surface of the windshield G output from the temperature sensor near the windshield 37 and the humidity near the interior surface of the windshield G output from the humidity sensor near the windshield 38. Get the dew point temperature.

  In step SA4, it is determined whether the target intake mode is the inside air circulation mode. If it is determined YES in step SA4 that the target intake mode is the internal air circulation mode, it is considered that the occupant does not want to introduce outside air, so the process proceeds to step SA5 to set the target intake mode to the internal air circulation mode. At step SA13, a control signal is output to the inside / outside air switching actuator 11d. The inside / outside air switching actuator 11d rotates the intake door 11c so as to be in the inside air circulation mode. Thus, no outside air is introduced into the vehicle compartment.

  If it is determined NO in step SA4 and the target intake mode is the outside air introduction mode or the inside / outside air mixing mode, the process proceeds to step SA6. In step SA6, the target opening degree (INTtrg) of the intake door 11c is calculated from the target dew point temperature and the dew point temperature calculated in step SA3. If the dew point temperature is higher than the target dew point temperature, the target opening degree (INTtrg) of the intake door 11c is calculated so as to increase the outside air introduction amount, and if the dew point temperature is lower than the target dew point temperature, the inside air circulation amount The target opening degree (INTtrg) of the intake door 11c is calculated so as to increase. When the dew point temperature is higher than the target dew point temperature, the outside air introduction amount is increased as the difference becomes larger, and when the dew point temperature is lower than the target dew point temperature, the inner air circulation amount is increased as the difference becomes larger. That is, the control device 30 detects the foginess of the windshield G, and basically, based on the detection result, when the windshield G tends to be fogged, the amount of introduced outside air is increased, while the window glass In the case where it is difficult to get cloudy, the internal air circulation amount is increased.

  In the following step SA7, a cold state felt by the occupant is obtained from the inside air temperature output from the inside air temperature sensor 32, the outside air temperature output from the outside air temperature sensor 31, and the solar radiation amount output from the solar radiation amount sensor 33, Based on this, the first intake door correction opening degree (INTc1) is calculated. The first intake door correction opening degree (INTc1) is the first internal air circulation amount.

  As shown in FIG. 4, the first intake door correction opening degree (INTc1) is set so that the amount of internal air circulation decreases as the degree of internal air temperature decreases and it can be determined that the occupant feels cold. Further, when it is determined that the outside air temperature is low and it can be determined that the occupant feels cold, the internal air circulation amount is set to be smaller as the degree is stronger, and it can be determined that the amount of solar radiation is small and the occupant feels cold. As the degree is stronger, the internal air circulation amount is set to be smaller. That is, it can be determined whether the occupant feels cold. The first intake door correction opening degree (INTc1) is set between 0% and 100%.

  A step SA8 following the step SA7 shown in FIG. 3 calculates the second intake door correction opening degree (INTc2) from the air volume (voltage applied to the blower motor 15b) and the blowing mode. The second intake door correction opening degree (INTc2) is the second internal air circulation amount.

  As shown in FIG. 5, when calculating the second intake door correction opening (INTc2), the correction opening (INTf) calculated based on the air volume and the correction opening (INTm) calculated based on the blowing mode Of the correction opening degree (INTf) and the correction opening degree (INTm), the lower value of which is taken as the second intake door correction opening degree (INTc2). The correction opening degree (INTf) is set such that the amount of internal air circulation decreases as the air volume decreases. If the air volume at the time of heating is small, the occupant may feel cold, and in this case, the amount of inside air circulation is reduced. Further, the correction opening degree (INTm) is set so that the amount of internal air circulation is maximized in the defroster mode (DEF), and the amount of internal air recirculation is minimized in the bi-level mode (B / L). It is set. That is, in the bi-level mode, the amount of air blown to the upper body is larger than in the defroster mode, and in this case, the amount of internal air circulation is small. The second intake door correction opening (INTc2) is set between 0% and 100%.

  In step SA9 following step SA8 shown in FIG. 3, the third intake door correction opening degree (INTc3) is calculated from the riding state of the occupant obtained from the riding sensor 40. The third intake door correction opening degree (INTc3) is the third internal air circulation amount.

  As shown in FIG. 6, when calculating the third intake door correction opening degree (INTc3), when the occupant is also seated in the rear seat, compared to the case where the occupant is seated only in the front seat, the inside air is calculated. Reduce the amount of circulation. When the occupant is also seated in the rear seat, the occupant in the rear seat feels cold more easily than the occupant in the front seat, so the amount of internal air circulation is reduced in this case.

  In step SA10 following step SA9 shown in FIG. 3, it is determined whether or not the intake mode has just been switched to the inside / outside air switching mode. If YES is determined in step SA10 and the intake mode is immediately after switching to the internal / external air switching mode, the process proceeds to step SA11, while NO is determined in step SA10 and the intake mode is switched to the internal / external air switching mode If a predetermined time (for example, about 10 seconds) or more has elapsed, the process proceeds to step SA12.

  In step SA11, after setting the intake mode to the inside / outside air mixing mode, among the first intake door correction opening degree (INTc1), the second intake door correction opening degree (INTc2), and the second intake door correction opening degree (INTc3), After the smallest opening degree is selected as the intake opening degree, the process proceeds to step SA13, and a control signal is output to the inside / outside air switching actuator 11d. The inside / outside air switching actuator 11d rotates the intake door 11c so as to have the opening degree selected in step SA11.

  In step SA12, after setting the intake mode to the internal / external air mixing mode, the target opening degree (INTtrg), the first intake door correction opening degree (INTc1), the second intake door correction opening degree (INTc2), and the second intake door After the smallest opening degree among the correction opening degrees (INTc3) is selected as the intake opening degree, the process proceeds to step SA13 to output a control signal to the inside / outside air switching actuator 11d. The inside / outside air switching actuator 11d rotates the intake door 11c so as to have the opening degree selected in step SA11.

  As described above, according to this embodiment, basically, if the passenger does not select the inside air circulation mode at the time of heating, the air in the vehicle compartment can be introduced into the temperature control unit 12 to be temperature controlled. . As a result, the amount of ventilation in the vehicle compartment can be reduced, and the energy consumption required for heating can be reduced.

  Then, in step SA7, it can be determined whether the occupant is in a cold state based on the inside air temperature, the outside air temperature, and the amount of solar radiation. If it is determined that the occupant is in a cold state (the inside air temperature and outside air temperature are low, and the amount of solar radiation is low), the amount of inside air circulation decreases, so the blown warm air is immediately sucked into the temperature control unit 12 Can be suppressed. As a result, the warm air can easily flow to the entire vehicle interior, so the warm air can easily reach the upper body of the occupant and the occupant in the rear seat, and the occupant feels that heating is working.

  Further, when it is determined in step SA7 whether the occupant is in a cold condition or not, the occupant's atmosphere temperature can be obtained directly by detecting the temperature inside the vehicle compartment by means of the inside air temperature sensor 32. It becomes possible to determine correctly whether there is any. Further, by detecting the air temperature outside the passenger compartment by the outside air temperature sensor 31, it is possible to accurately determine whether the occupant feels cold. Further, by detecting the amount of solar radiation by the solar radiation amount detection sensor 33, the atmosphere temperature of the occupant can be indirectly obtained. Therefore, it can be accurately determined whether the occupant is in a cold condition.

  In step SA8, it can be determined whether the occupant is in a cold state based on the air flow rate at the time of heating. If the amount of air blown during heating is small, it is easy for the occupants to feel cold. In this case, by reducing the amount of internal air circulation, it can be suppressed that the blown warm air is immediately sucked into the temperature control unit 12 Even if there are few, it becomes easy to flow over the whole vehicle interior. Thus, the warm air can easily reach the upper body of the occupant and the occupant in the rear seat, and the occupant feels that heating is working.

  Further, when the occupant is in the rear seat in step SA9, the warm air can easily reach the occupant in the rear seat by reducing the amount of circulating air, and the occupant in the rear seat feels that heating is working.

  Further, immediately after the mode is switched to the inside / outside air mixing mode, the amount of inside air circulation decreases as the inside / outside air mixing mode, so that the passenger feels that heating is working early.

  Although the steps SA7 to SA9 are provided in the above embodiment, any one or two of these steps may be provided.

  Further, as in the first modification of the embodiment shown in FIG. 7, step SB1 may be inserted between step SA3 and step SA4. Step SB1 determines, based on the vehicle speed detected by the vehicle speed sensor 41 and the air flow rate to the vehicle compartment, whether outside air flows into the vehicle compartment from the inside air introduction port 11b. That is, if the vehicle speed detected by the vehicle speed sensor 41 is high, there is a risk that outside air flowing into the intake portion 11 from the outside air inlet 11a may flow into the vehicle compartment without being temperature-controlled from the inside air inlet 11b. Yes, this gives the occupants a sense of discomfort. At this time, if there is a large air flow to the passenger compartment, air outside the passenger compartment will be sucked into the temperature control unit 12 and introduced even if the vehicle speed is somewhat high. Flow into the passenger compartment is avoided. That is, depending on the magnitude relationship between the vehicle speed and the air flow rate to the vehicle compartment, the air outside the vehicle may flow into the vehicle compartment without temperature adjustment, or the air outside the vehicle compartment may flow into the vehicle compartment after temperature adjustment. There is.

  In the first modification, when it is determined that the air outside the passenger compartment does not flow into the passenger compartment from the inside air inlet 11b based on the vehicle speed and the air flow to the passenger compartment (when it is determined NO in step SB1), Since the air in the passenger compartment and the air outside the passenger compartment are introduced into the temperature control unit 12 in the inside / outside air mixing mode in SA11 and step SA12, the outside air does not flow into the passenger compartment without being temperature-controlled. On the other hand, if it is determined YES in step SB1 and it is determined that the air outside the vehicle room flows into the vehicle room from the inside air introduction port 11b, the process proceeds to step SA5 and the inside air circulation mode is set. It does not flow into the cabin without being done.

  Further, as in the modification 2 of the embodiment shown in FIG. 8, step SC1, step SC2 and step SC3 may be inserted between step SA3 and step SA4. Step SC1 is a step to determine whether the blower motor 15b is stopped. If it is determined in step SC1 that the blower motor 15b is stopped, the process proceeds to step SC2 to determine whether the dew point temperature is equal to or less than a predetermined temperature. The predetermined temperature is set to a temperature at which the windshield G tends to be fogged. Thus, in step SC2, it can be determined whether or not the windshield G is likely to be overcast. If it is determined in step SC2 that the dew point temperature is equal to or lower than the predetermined temperature, the process proceeds to step SA5 to set the inside air circulation mode. On the other hand, when it is determined in step SC2 that the dew point temperature is higher than the predetermined temperature, the process proceeds to step SC3 and the outside air introduction mode is set. That is, even when the air flow is stopped, when the vehicle travels, the air outside the vehicle compartment enters the intake unit 11 in response to the traveling wind. At this time, when the dew point temperature is higher than a predetermined temperature and the windshield G is easily fogged, the fogging is suppressed by setting the outside air introduction mode. In addition, when the dew point temperature is below the predetermined temperature and the windscreen glass G is less likely to be fogged, it is possible to suppress the supply of uncontrolled air to the passenger compartment by setting the inside air circulation mode. Become. Thus, the comfort of the occupant can be further improved.

  In addition, the temperature of the window glass other than the windshield may be detected.

  The embodiments described above are merely illustrative in every respect and should not be construed as limiting. Furthermore, all variations and modifications that fall within the equivalent scope of the claims fall within the scope of the present invention.

  As described above, the vehicle air conditioner according to the present invention can be used, for example, when air conditioning the interior of a vehicle.

DESCRIPTION OF SYMBOLS 1 Air-conditioner for vehicles 11 Intake part 11a Outside air introduction port 11b Interior air introduction port 11c Intake door 12 Temperature control part 13 Blowing direction switching part 30 Control device 31 Outside air temperature sensor 32 Interior temperature sensor 33 Solar radiation sensor 40 Occupant sensor 41 Vehicle speed sensor G Windscreen glass (window glass)

Claims (8)

An intake unit that changes the amount of air circulating in the vehicle compartment and the amount of air introduced outside the vehicle,
A temperature control unit for controlling the temperature of the air introduced from the intake unit;
An outlet direction switching unit that supplies conditioned air temperature-controlled by the temperature control unit to each part of the vehicle compartment;
It is configured to detect the ease of fogging of the window glass of the vehicle, and to increase the outside air introduction amount when the window glass is likely to be cloudy based on the detection result, while increasing the inside air circulation amount when the window glass is difficult to be fogged. An air conditioner for a vehicle provided with a controlled controller,
A cold related information detecting means for detecting information related to cold felt by the occupant, the cold related information detecting means comprising an inside air temperature sensor for detecting an air temperature inside the vehicle compartment and an outside air temperature for detecting an air temperature outside the vehicle outside A sensor, a solar radiation detection sensor for detecting the amount of solar radiation, and an occupant sensor for detecting whether or not an occupant is present at the rear seat disposed behind the front seat of the vehicle compartment, and to the upper body of the occupant Configured to detect air flow,
The control device determines whether the occupant is in a cold state or not by the cold / heat related information detecting means when introducing the air in the passenger compartment and the air outside the passenger compartment into the temperature control unit at the time of heating. When it is determined that the first internal air circulation amount set smaller than when it is determined that the situation is not cold is determined, and the air flow to the upper body of the occupant detected by the cold related information detecting means is small The second internal air circulation amount set so as to be substantially smaller is obtained, and when it is detected by the occupant sensor that there is an occupant in the rear seat, the third internal air circulation which is set smaller than the case where it is not detected. So as to control the intake section so that the amount of the first internal air circulation, the second internal air circulation, and the third internal air circulation is the smallest. To Vehicle air-conditioning apparatus characterized by being made. In the vehicle air conditioner according to claim 1,
The cold air related information detection means is configured to detect the air flow rate to the passenger compartment. In the vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner characterized in that the cold-heat related information detection means is configured to detect a blowout mode of the conditioned air. An intake unit that changes the amount of air circulating in the vehicle compartment and the amount of air introduced outside the vehicle,
A temperature control unit for controlling the temperature of the air introduced from the intake unit;
An outlet direction switching unit that supplies conditioned air temperature-controlled by the temperature control unit to each part of the vehicle compartment;
It is configured to detect the ease of fogging of the window glass of the vehicle, and to increase the outside air introduction amount when the window glass is likely to be cloudy based on the detection result, while increasing the inside air circulation amount when the window glass is difficult to be fogged. An air conditioner for a vehicle provided with a controlled controller,
A cold related information detecting means for detecting information related to cold felt by the occupant, the cold related information detecting means comprising an inside air temperature sensor for detecting an air temperature inside the vehicle compartment and an outside air temperature for detecting an air temperature outside the vehicle outside A sensor, a solar radiation detection sensor for detecting the amount of solar radiation, and an occupant sensor for detecting whether or not an occupant is present at the rear seat disposed behind the front seat of the vehicle compartment, and to the upper body of the occupant Configured to detect air flow,
The control device determines whether the occupant is in a cold state or not by the cold / heat related information detecting means when introducing the air in the passenger compartment and the air outside the passenger compartment into the temperature control unit at the time of heating. When it is determined that the first internal air circulation amount set smaller than when it is determined that the situation is not cold is determined, and the air flow to the upper body of the occupant detected by the cold related information detecting means is small The second internal air circulation amount set so as to be substantially smaller is obtained, and when it is detected by the occupant sensor that there is an occupant in the rear seat, the third internal air circulation which is set smaller than the case where it is not detected. The amount is determined, and furthermore, it is detected whether or not the air in the vehicle compartment and the air outside the vehicle are switched to the inside / outside air mixing mode for introducing the air into the temperature control unit, and the switching to the inside / outside air mixing mode is When taking out, it is configured to control the intake section so as to be any one of the first internal air circulation amount, the second internal air circulation amount, and the third internal air circulation amount. A vehicle air conditioner characterized in that In the vehicle air conditioner according to claim 4,
The cold air related information detection means is configured to detect the air flow rate to the passenger compartment. In the vehicle air conditioner according to claim 4 or 5,
The vehicle air conditioner characterized in that the cold-heat related information detection means is configured to detect a blowout mode of the conditioned air. In the vehicle air conditioner according to any one of claims 1 to 6,
It has a vehicle speed sensor that detects the speed of the vehicle,
The control device determines that the air outside the passenger compartment does not flow into the passenger compartment from the introduction port for introducing air into the passenger compartment, based on the vehicle speed detected by the vehicle speed sensor and the air flow to the passenger compartment. In this case, the air-conditioning system for a vehicle is configured to control the intake unit so as to introduce the air in the vehicle compartment and the air outside the vehicle compartment into the temperature control unit. In the vehicle air conditioner according to any one of claims 1 to 6,
The above-mentioned control device is a case where ventilation is stopped, and when the window glass is likely to be fogged, it is in an outside air introduction mode in which air outside the vehicle is introduced to the temperature control section. An air conditioner for a vehicle, which is configured to be in an internal air circulation mode for introducing air in a vehicle compartment to the temperature control unit.

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