JP2006298262A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of restraining electric power consumption when a heat load is large and improving feeling when a person rides in the vehicle. <P>SOLUTION: Target indoor temperature, indoor temperature and seat surface temperature are taken in (steps 100, 102), and whether difference between the indoor temperature and the target indoor temperature is large or not and whether difference between the seat surface temperature and the target seat surface temperature is large or not are judged (steps 104, 106). The number of revolution of a compressor and driving voltage of a blower fan are set at a value lower than the maximum (steps 108, 110) when the difference between both of them and otherwise, it is set at the maximum (steps 112, 114). Working of pre-air-conditioning is started by set capacity, operation of the pre-air-conditioning is continued until residual capacity of the battery becomes predetermined quantity or less and operation of the pre-air-conditioning is stopped when the residual capacity of the battery becomes the predetermined quantity or less(steps 116 to 120). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that performs pre-air conditioning before an occupant gets on the vehicle.

  Conventionally, as an air conditioner for air-conditioning a vehicle interior of a hybrid vehicle that uses an engine and an electric motor as a drive source, the vehicle is driven by electric power from a battery in order to air-condition the vehicle interior even when the engine is stopped. Some have air-conditioning indoors. In such an air conditioner, it is necessary to control the battery so as not to overdischarge.

  For this reason, Patent Document 1 discloses that when a compressor of a refrigeration cycle is driven by a motor, at least one of the capacity of the blower and the compressor is reduced as compared to when driven by an engine, and further, cooling of the evaporator is performed. An apparatus is described that reduces power consumption by giving priority to a reduction in compressor capacity when the thermal load is large.

  Patent Document 2 describes a device that detects the power generation state of an electric motor driven by an engine and limits the output to the electric compressor to a predetermined value or less when the power generation amount is insufficient.

  Patent Document 3 describes a device that limits the rotational speed of an electric compressor while the vehicle is stopped.

Further, Patent Document 4 describes an apparatus that holds operation efficiency data related to the number of revolutions with good operation efficiency of the electric compressor and operates the electric compressor by determining a time to start the electric compressor based on the operation efficiency data. Has been.
JP 2001-180260 A JP 2000-232799 A JP 2002-237356 A JP 2003-237351 A

  By the way, in recent years, a technique has been proposed in which the passenger compartment is pre-air-conditioned in advance before boarding the passenger to improve the comfort when the passenger gets on. For example, when a cooling operation is performed as pre-air conditioning before boarding a vehicle that has been stopped for a long time in midsummer, the heat load becomes very large because the temperature in the passenger compartment is high. For this reason, in order to obtain the maximum cool-down performance, pre-cooling may be performed by setting the rotation speed of the electric compressor to the maximum rotation speed and setting the blower fan voltage to the maximum voltage.

  However, when pre-cooling is performed in this manner, the power consumption is too large, and the operation time is extremely shortened even if the battery capacity is sufficient. In addition, even if the temperature of air blown from the air outlet is lowered, if the operating time is short, the heat capacity of the passenger's seat cannot be taken sufficiently, and the feeling when riding can not be improved There is.

  The present invention has been made in consideration of the above-described facts, and provides a vehicle air conditioner that can reduce power consumption when the heat load is large and can improve the feeling when riding. With the goal.

  In order to achieve the above object, the invention described in claim 1 is characterized in that at least one of the temperature and the amount of air blown from the air outlet provided in the vehicle interior of the vehicle by the electric power supplied from the charged power storage means. Adjusting means for adjusting the vehicle interior temperature detecting means for detecting the temperature in the passenger compartment, surface temperature detecting means for detecting the surface temperature of a portion in contact with the occupant during the ride, and the vehicle before the occupant gets on the vehicle Control means for operating the adjusting means with the ability set based on the temperature and the surface temperature of the vehicle interior when execution of pre-air conditioning for indoor air conditioning is instructed. .

  According to this invention, the adjusting means is operated by the electric power supplied from the charged power storage means, and adjusts at least one of the temperature and air volume of air blown from the air outlet provided in the vehicle interior of the vehicle. To do.

  The control means is detected by the vehicle interior temperature detected by the vehicle interior temperature detecting means and the surface temperature detecting means when the execution of pre-air conditioning for air conditioning the vehicle interior is instructed before the passenger gets on the vehicle. Based on the surface temperature of the part that the occupant contacts during riding, the capacity of the adjusting means is set, and the adjusting means is operated with the set capacity.

  For example, as described in claim 2, the control means has an absolute value of a difference between the temperature in the vehicle interior and the target vehicle interior temperature that is equal to or greater than a first threshold value, and the difference between the surface temperature and the target surface temperature. When the absolute value of the difference satisfies a condition equal to or greater than a second threshold, the adjusting means is operated with a first ability lower than the maximum ability of the adjusting means, and when the condition is not satisfied, the first The adjusting means is operated with a second ability higher than the ability of one.

  That is, when the heat load is large, the capacity is reduced and the adjusting means is operated, so that power consumption can be suppressed. Therefore, since the pre-air-conditioning operation time can be lengthened, for example, when performing cooling operation as pre-air-conditioning, an appropriate cool-down performance can be obtained, and the feeling when riding can be improved. .

  Specifically, as described in claim 3, the adjusting means includes a compressor and a blower fan that are operated by the electric power supplied from the power storage means, and the control means, when the condition is satisfied, When the compressor is operated at a first rotational speed lower than the maximum rotational speed and the blower fan is operated at a first air volume smaller than the maximum air volume, and the condition is not satisfied, the first rotational speed is satisfied. The compressor can be operated at a higher second rotational speed and the blower fan can be operated at a second air volume that is larger than the first air volume.

  According to a fourth aspect of the present invention, the second rotational speed may be a maximum rotational speed, and the second air volume may be a maximum air volume. Thereby, the vehicle interior can be air-conditioned in a shorter time.

  According to a fifth aspect of the present invention, the part in contact with the occupant may be a seat on which the occupant is seated. Thereby, the feeling when a passenger is seated can be improved.

  According to a sixth aspect of the present invention, the apparatus further comprises detection means for detecting a storage amount of the power storage means, and the control means is configured to detect the precharge when the storage amount detected by the detection means is equal to or less than a predetermined amount. The operation of air conditioning may be stopped. Thereby, it can prevent that the electrical storage amount of an electrical storage means falls too much.

  As described above, according to the present invention, it is possible to suppress power consumption when the heat load is large, and to improve the feeling when riding.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic configuration of a vehicle air conditioner 10 according to an embodiment of the present invention. As shown in FIG. 1, the vehicle air conditioner 10 includes a refrigerant circuit including a compressor 12 as a compressor, a condenser 14 as a condenser, an expansion valve 16 as a decompressor, and an evaporator 18 as an evaporator. A refrigeration cycle is configured.

  The compressor 12 is an electric compressor and is driven by an electric motor 70 (see FIG. 2). The compressor 12 is operated by rotationally driving the electric motor 70. The compressor 12 compresses the low-pressure gas-phase refrigerant into a high-temperature and high-pressure superheated gas-phase refrigerant.

  Although various types of compressors 12 can be applied as the compressor 12, here, a description will be given assuming that a conventionally known variable displacement compressor is applied. In such a compressor 12, the solenoid valve 20 is controlled by changing the current value of the energization current to the solenoid valve 20 (see FIG. 2) of the compressor 12 or changing the duty ratio, and the piston of the compressor 12 is changed. The suction pressure of the refrigerant can be changed by changing the stroke. Thereby, the refrigerant | coolant circulation amount by the compressor 12, ie, a cooling capacity, is adjusted.

  The condenser 14 is a heat exchanger between the refrigerant and the outside air that is disposed downstream of the compressor 12, and cools and condenses the superheated gas-phase refrigerant discharged from the compressor 12 to form a liquid-phase refrigerant. The liquid-phase refrigerant that has flowed out of the condenser 14 is depressurized by the expansion valve 16 to become a low-pressure liquid phase.

  The expansion valve 16 provided on the upstream side of the evaporator 18 supplies the liquefied refrigerant to the evaporator 18 in the form of a mist by rapidly depressurizing the liquefied refrigerant. Thereby, the vaporization efficiency of the refrigerant | coolant in the evaporator 18 can be improved.

  The evaporator 18 is a heat exchanger that evaporates the low-pressure liquid-phase refrigerant into a low-pressure gas-phase refrigerant, and the air that passes through the evaporator 18 (hereinafter, after the evaporator) is vaporized when the compressed and liquefied refrigerant is vaporized. The air). At this time, the evaporator 18 cools the passing air so as to condense moisture in the air, thereby dehumidifying the air after the evaporator.

  The evaporator 18 is provided inside the air conditioning duct 22. The air conditioning duct 22 is open at both ends, and air intakes 24 and 26 are formed at one opening end. A plurality of air outlets 28 (in the present embodiment, 28A, 28B, and 28C are shown as an example in the present embodiment) are formed at the other opening end.

  The air intake port 24 communicates with the outside of the vehicle and can introduce outside air into the air conditioning duct 22. In addition, the air intake 26 communicates with the vehicle interior, and air (inside air) in the vehicle interior can be introduced into the air conditioning duct 22. As an example, the air outlet 28A is a defroster outlet that blows air toward a windshield glass (not shown) of the vehicle, and the air outlet 28B is a side and center register outlet. The air outlet 28C is a foot outlet.

  In the air conditioning duct 22, a blower fan 30 is provided between the evaporator 18 and the air intakes 24 and 26. Further, an air intake switching damper 32 is provided in the vicinity of the air intakes 24 and 26. The air intake switching damper 32 opens and closes the air intakes 24 and 26 by the operation of an actuator such as a servo motor 34 (see FIG. 2).

  The blower fan 30 is rotated by driving the blower motor 36, sucked into the air conditioning duct 22 from the air intake port 24 to the air intake port 26, and further sends this air toward the evaporator 18. At this time, outside air or inside air is introduced into the air conditioning duct 22 in accordance with the open / closed state of the air intake ports 24 and 26 by the air intake switching damper 32.

  That is, when the air intake switching damper 32 closes the air intake 24, the inside air enters the inside air circulation mode in which the air is introduced into the air conditioning duct 22, and when the air intake switching damper 32 closes the air intake 26. The outside air introduction mode in which outside air is introduced into the air conditioning duct 22 is set.

  An air mix damper 38 and a heater core 40 are provided on the downstream side of the evaporator 18. The air mix damper 38 is rotated by driving a servo motor 42 (see FIG. 2), and adjusts the amount of air passing through the heater core 40 after the evaporator 18 and the amount of bypassing the heater core 40.

  A cooling water circulation path is formed in the heater core 40 with a vehicle engine (not shown), and the cooling water circulates in the heater core 40 by operation of a circulation pump (not shown). Thereby, the air passing through the heater core 40 is heated by the cooling water heated by the engine.

  Therefore, the air heated by the heater core 40 and the air cooled by the evaporator 18 by bypassing the heater core 40 are mixed, and the mixed air is blown out from the air outlet 28 as conditioned air. At this time, in the vehicle air conditioner 10, the opening of the air mix damper 38 is controlled to adjust the amount of air passing through the heater core 40 and air bypassing the heater core 40, so that the air blower 28 enters the vehicle interior. Adjust the temperature of the air that blows out.

  An air outlet switching damper 44 is provided in the vicinity of the air outlet 28. In the vehicle air conditioner 10, the air outlets 28 </ b> A, 28 </ b> B, 28 </ b> C are opened and closed by these air outlet switching dampers 44, whereby the temperature-controlled air can be blown out from a desired position into the vehicle interior. The operation of the air outlet switching damper 44 will be described as being performed by driving the servo motor 46 in accordance with the operation mode in which the vehicle air conditioner 10 is set. The thing which can open and close the blowing outlet 28 may be used.

  Next, the configuration of the control system of the vehicle air conditioner 10 according to the present embodiment will be described. In FIG. 2, the schematic block diagram of the control system of the vehicle air conditioner 10 which concerns on this embodiment was shown.

  The vehicle air conditioner 10 includes an air conditioning control unit 50 configured by a microcomputer including a ROM, a RAM, and a CPU (not shown).

  The air conditioning controller 50 includes the servo motor 34 that drives the air intake switching damper 32, the servo motor 42 that drives the air mix damper 38, the servo motor 46 that drives the air outlet switching damper 44, and the suction pressure of the compressor 12. An electromagnetic valve 20 to be controlled, an electric motor 70 for driving the compressor 12, and a blower motor 36 for driving the blower fan 30 are connected to each other.

  In addition, the air conditioning control unit 50 sets the air flow of the blower fan 30, the air intake port, the air outlet, and the like in the manual mode or the auto mode, the outside air introduction mode, the inside air, as well as the target vehicle interior temperature setting. An operation panel 54 is connected to set an operation mode (air conditioning conditions) such as setting of the air outlet 28 for performing the circulation mode or blowing out the temperature-controlled air. The vehicle air conditioner 10 operates based on the air conditioning conditions set by the occupant by operating the operation panel 54. The air conditioning conditions set by the occupant are stored in a memory 66 described later.

  The vehicle air conditioner 10 also includes a post-evaporator temperature sensor 56 that detects the temperature of the air after the evaporator (hereinafter referred to as the temperature after the evaporator), an outside air temperature sensor 58 that detects the outside air temperature outside the vehicle, and the temperature inside the vehicle interior. A vehicle interior temperature sensor 60, a solar radiation sensor 62, a receiver 64, for example, a non-volatile memory 66 such as a flash ROM, a seat surface temperature sensor 68 for detecting a surface temperature of a seat on which a passenger (not shown) is seated, and a vehicle An SOC (State of Charge) sensor 69 for detecting the remaining capacity (charged amount) of the battery 71 is provided, and these are connected to the air conditioning control unit 50, respectively.

  The post-evaporator temperature sensor 56 is composed of, for example, a thermistor, and senses the temperature of the air after the evaporator as a resistance change, and outputs a post-evaporator temperature signal corresponding to the temperature of the post-evaporator air to the air conditioning control unit 50. The post-evaporator temperature sensor 56 is installed at the rear portion of the evaporator 18.

  The outside air temperature sensor 58 is composed of, for example, a thermistor, senses the outside air temperature as a resistance change, and outputs an outside air temperature signal corresponding to the outside air temperature to the air conditioning control unit 50. The outside air temperature sensor 58 is installed at, for example, a lower part of a vehicle front bumper reinforcement.

  The vehicle interior temperature sensor 60 is composed of, for example, a thermistor, detects the vehicle interior temperature as a resistance change, and outputs a vehicle interior temperature signal corresponding to the vehicle interior temperature to the air conditioning control unit 50. The vehicle interior temperature sensor 60 is installed at a predetermined position, for example, in an instrument panel of the vehicle.

  The solar radiation sensor 62 is configured by light detection means such as a photodiode, and outputs a solar radiation amount signal corresponding to the solar radiation amount to the air conditioning control unit 50. The solar radiation sensor 62 is installed, for example, near the defroster outlet at the top of the instrument panel of the vehicle.

  The receiving unit 64 receives various signals transmitted from the remote control key 80 of the vehicle as shown in FIG.

  The seat surface temperature sensor 68 is composed of, for example, a thermistor, detects the seat surface temperature on which the occupant is seated as a resistance change, and outputs a seat surface temperature signal corresponding to the seat surface temperature to the air conditioning control unit 50. The seat surface temperature sensor 68 is provided on at least one of the seat back and the seat cushion, and is provided at a site where at least a part of the occupant's body reliably contacts when the occupant is seated.

  As shown in FIG. 3A, the remote control key 80 has a configuration in which a grip portion 84 is attached to a key portion 82 that is inserted into a key insertion port of a vehicle. The grip portion 84 is provided with a lock button 86 for locking the vehicle door, an unlock button 88 for unlocking the vehicle door, and a pre-air conditioning button 90 for instructing execution of pre-air conditioning described later. It has been.

  FIG. 5B shows a block diagram of a control system of the remote control key 80. As shown in FIG. 5B, the remote control key 80 is provided with a lock button 86, an unlock button 88, a pre air conditioning button 90, And the transmission part 94 is the structure connected.

  When the lock button 86 is pressed, the control unit 92 causes the transmission unit 94 to wirelessly transmit a lock signal indicating that the lock button 86 has been pressed. When this signal is received on the vehicle side, the door of the vehicle is locked. Similarly, when the unlock button 88 is pressed, the control unit 92 causes the transmission unit 94 to wirelessly transmit an unlock signal indicating that the unlock button 88 has been pressed. When this signal is received on the vehicle side, the door of the vehicle is unlocked.

  Further, when the pre-air conditioning button 90 is pressed, the control unit 92 causes the transmission unit 94 to wirelessly transmit a pre-air conditioning signal indicating that the pre-air conditioning button 90 has been pressed. When this signal is received on the vehicle side, pre-air conditioning control to be described later is executed.

  In the air-conditioning control unit 50, during normal air-conditioning operation, if air-conditioning conditions including target vehicle interior temperature are set, the air-conditioning condition and environmental conditions (outside air temperature, vehicle interior temperature, solar radiation amount, etc.) Based on this, air conditioning control in the passenger compartment is performed.

  For example, when the auto mode is set, based on the target vehicle interior temperature and the environmental conditions, the target air temperature for setting the vehicle interior to the target vehicle interior temperature (the target temperature of the air blown from the air outlet) ), The opening degree of the air mix damper 38, the blower level (the air volume of the blower fan 30), the air intake port, the air outlet port, etc. are set, and the suction pressure of the compressor 12 (the capacity of the compressor 12) is set based on the setting results. The air conditioning of the vehicle interior is performed by controlling the motors that drive the blower fan 30, the air intake switching damper 32, the air mix damper 38, the air outlet switching damper 44, and the like.

The target blowout temperature T _AO can be generally calculated from the target vehicle interior temperature T _SET , the vehicle interior temperature T _R , the outside air temperature T _AM , and the solar radiation amount T _S using the following equation.

T _AO = k ₁ · T _SET −k ₂ · T _R −k ₃ · T _AM −k ₄ · T _S + C (1)
(However, k ₁ , k ₂ , k ₃ , k ₄ , and C are preset constants)
Further, when the manual mode (auto mode off) is set, the target blowout temperature, the opening degree of the air mix damper 38, and the like are set based on the target vehicle interior temperature and the environmental conditions. Based on the air conditioning conditions such as the air inlet, air outlet, blower level, etc. selected by the operation, the suction pressure of the compressor 12, the blower fan 30, the air intake switching damper 32, the air mix damper 38, and the air outlet The interior of the vehicle is air-conditioned by controlling each motor that drives the switching damper 44 and the like.

  In addition, when the air conditioning control unit 50 receives the pre air conditioning signal transmitted from the remote control key 80 in a state where no occupant is in the vehicle, the air conditioning control unit 50 performs pre air conditioning control described later. In this pre-air-conditioning control, the passenger compartment is air-conditioned before the passenger gets on, and the comfort when the passenger gets on is improved.

  Next, as an operation of the present embodiment, a pre-air-conditioning (pre-cooling) control routine performed by the air-conditioning control unit 50 will be described with reference to a flowchart shown in FIG. In the pre-air conditioning control routine shown in FIG. 4, the occupant presses the pre-air conditioning button 90 of the remote control key 80 within the detection range of the signal output from the remote control key 80, and the pre-air conditioning signal transmitted from the remote control key 80 is received. Executed when received normally.

  First, in step 100, the target vehicle interior temperature stored in the memory 66 is read. In step 102, the vehicle interior temperature signal output from the vehicle interior temperature sensor 60 is captured, and the seat surface temperature sensor 68 outputs the seat. Capture surface temperature signal.

  In step 104, it is determined whether or not the difference between the detected vehicle interior temperature and the target vehicle interior temperature is large. That is, it is determined whether or not the difference between the detected vehicle interior temperature and the target vehicle interior temperature (a value obtained by subtracting the target vehicle interior temperature from the detected vehicle interior temperature) is equal to or greater than the first threshold value. The first threshold value is set to a value at which it can be determined that the heat load is large and the power consumption of the compressor or the like is relatively high when the difference is equal to or greater than this value. For example, considering that the average target passenger compartment temperature that passengers feel comfortable is about 25 degrees, and the vehicle is left in the sun for a long time, the passenger compartment temperature will be 60 degrees or higher. The threshold value is set to a value in the range of 40 degrees to 60 degrees as an example. In the present embodiment, the target passenger compartment temperature is a temperature set by the occupant, but may be a predetermined fixed value (for example, 25 degrees).

  If the difference between the detected vehicle interior temperature and the target vehicle interior temperature is equal to or greater than the first threshold value, the routine proceeds to step 106. On the other hand, when the difference between the detected vehicle interior temperature and the target vehicle interior temperature is less than the first threshold value, the routine proceeds to step 112 where the rotational speed of the compressor 12 is set to the maximum rotational speed (second rotational speed). Set. That is, the cooling capacity is set to the maximum. Next, at step 114, the drive voltage for driving the blower fan 30 is set to the maximum voltage. That is, the air volume of the blower fan 30 is set to the maximum air volume (second air volume).

  In step 106, it is determined whether or not the difference between the detected sheet surface temperature and the target sheet surface temperature is large. That is, it is determined whether or not the difference between the detected sheet surface temperature and the target sheet surface temperature (a value obtained by subtracting the target sheet surface temperature from the detected sheet surface temperature) is equal to or greater than the second threshold value. When the difference is equal to or greater than this value, the second threshold is set to a value at which it can be determined that the heat load is large and the power consumption of the compressor or the like is relatively high. For example, when the average seat surface temperature that the passenger feels comfortable is about 30 degrees, and the vehicle is left in the sun for a long time, the vehicle interior temperature becomes 60 degrees or more, and the second threshold value Is set to a value in the range of 40 to 60 degrees as an example. The target seat surface temperature is set in advance to an average temperature (for example, 30 degrees) that the passenger feels comfortable in consideration of the average body temperature (about 36 degrees) of the occupant. May be.

  If the difference between the detected sheet surface temperature and the target sheet surface temperature is equal to or greater than the second threshold value, the process proceeds to step 108. On the other hand, when the difference between the detected sheet surface temperature and the target sheet surface temperature is less than the second threshold value, the process proceeds to step 112.

In step 108, the rotational speed of the compressor 12 is set to a predetermined rotational speed (first rotational speed) lower than the maximum rotational speed. In other words, in the next step 110 in which the cooling capacity is set to be lowered, the drive voltage of the blower fan 30 is set to a predetermined voltage lower than the maximum voltage. That is, the air volume of the blower fan 30 is set to an air volume (first air volume) smaller than the maximum air volume.

  In step 116, the pre-air conditioning operation is started. That is, the electric motor 70 is driven so that the compressor 12 rotates at the set rotational speed, and the blower motor 36 is driven so that the blower fan 30 is driven at the set air volume. At this time, the opening degree of the air mix damper 38 is set so that all the air after the evaporator bypasses the heater core 40, and the servo motor 42 is controlled accordingly.

  In step 118, the remaining capacity of the battery 71 detected by the SOC sensor 69 is taken in, and it is determined whether or not this remaining capacity is equal to or less than a predetermined amount. For example, if the remaining capacity of the battery 71 is equal to or greater than this value, the predetermined amount is set to a value that allows a device that operates with the power of the battery 71 to operate normally.

  And when the remaining capacity of the battery 71 is below a predetermined amount, it transfers to step 120 and the operation | movement of pre air conditioning is stopped. That is, the drive of the compressor 12 and the blower fan 30 is stopped. On the other hand, when the remaining capacity of the battery 71 exceeds a predetermined amount, the pre-air conditioning operation is continued until the remaining capacity of the battery 71 becomes equal to or less than the predetermined amount.

  As described above, in this embodiment, when the difference between the detected vehicle interior temperature and the target vehicle interior temperature is large, and when the difference between the detected seat surface temperature and the target seat surface temperature is large, When the load is relatively high, pre-air conditioning is performed by reducing the cooling capacity, and when the thermal load is relatively small, such as when at least one of the deviations is small, the cooling capacity is set to the maximum and pre-air conditioning is performed. .

  Therefore, when the heat load is high, the power consumption decreases more slowly than in the conventional case where the rotational speed of the compressor and the air volume of the blower fan are maximized. It is possible to lengthen the time until the remaining capacity becomes a predetermined amount or less. For this reason, appropriate cool-down performance can be obtained, and the heat capacity of the seat or the like on which the occupant is seated can be effectively reduced. Further, if the degree of decrease in the air volume of the blower fan 30 is increased, the degree of decrease in the rotation speed of the compressor can be decreased, and the temperature of the air blown out from the air outlet can be lowered. . For this reason, it is possible to increase the feeling of cold wind when riding.

  When the heat load is small, the compressor speed and the blower fan airflow are maximized, but the operation time of the pre-air conditioning is shortened (about 2 to 3 minutes) by the maximum operation. The cabin is never too cold.

  Although the case where pre-cooling is performed has been described above, the present invention can also be applied to the case where pre-heating is performed. In this case, an electric heater 72 is provided as shown in FIG. 5, for example, instead of the heater core 40 that heats the air passing by the cooling water heated by driving the engine. In this case, the electric heater 72 is configured to change the heating capacity (power: wattage) and is driven by the heater driving unit 74.

  In the case of such a configuration, pre-heating can be performed by the same control as the flowchart shown in FIG. 4, and the electric heater 72 may be driven instead of driving the compressor 12. That is, in step 104, it is determined whether or not the difference between the detected vehicle interior temperature and the target vehicle interior temperature (a value obtained by subtracting the detected vehicle interior temperature from the target vehicle interior temperature) is greater than or equal to the first threshold value. . The first threshold value and the target vehicle interior temperature may be set to values different from those in the case of pre-cooling.

  If the difference between the detected vehicle interior temperature and the target vehicle interior temperature is not equal to or greater than the first threshold value, the heating capacity of the electric heater is set to the maximum at step 108.

  In step 106, it is determined whether or not a difference between the detected sheet surface temperature and the target sheet surface temperature (a value obtained by subtracting the detected sheet surface temperature from the target sheet surface temperature) is equal to or greater than a second threshold value. The second threshold value and the target sheet surface temperature may be set to values different from those in the case of pre-cooling.

  If the difference between the detected sheet surface temperature and the target sheet surface temperature is equal to or greater than the second threshold value, the heating capacity of the electric heater 72 is set lower than the maximum capacity in step 108.

  When starting the pre-air conditioning operation at step 116, the opening degree of the air mix damper 38 is set so that all the air after the evaporator passes through the electric heater 72, and the servo motor 42 is controlled accordingly.

  Note that the heater is not limited to an electric heater, and other heaters such as a combustion heater may be used as long as the heating capacity can be varied.

  In addition, the vehicle air conditioner 10 according to the present embodiment is configured to use an electric compressor, and is suitable for a hybrid vehicle or an electric vehicle that obtains driving force by an engine and a motor, but the electric compressor is used. However, the present invention can also be applied to a vehicle that obtains driving force only by an engine.

It is a figure which shows schematic structure of the vehicle air conditioner which concerns on this invention. It is a block diagram which shows schematic structure of the control system of the vehicle air conditioner which concerns on this invention. (A) is an external view of a remote control key, and (B) is a schematic block diagram of the remote control key. It is a flowchart which shows the pre air conditioning control routine performed with an air conditioning control part. It is a block diagram which shows schematic structure of the control system of the vehicle air conditioner which concerns on the modification of this invention.

Explanation of symbols

10. Vehicle air conditioner 12. Compressor (adjustment means)
28 Air outlet 30 Blower fan (adjustment means)
34, 42, 46 Servo motor 36 Blower motor 38 Air mix damper 40 Heater core 50 Air conditioning control unit (control means)
54 Operation panel 56 Evaporator post-temperature sensor 58 Outside air temperature sensor 60 Car interior temperature sensor (vehicle interior temperature detection means)
62 Solar sensor 64 Receiver 66 Memory 68 Sheet surface temperature sensor (surface temperature detection means)
69 SOC sensor (detection means)
70 Electric motor 71 Battery (power storage means)
74 Heater drive unit 80 Remote control key

Claims (6)

Adjusting means for adjusting at least one of the temperature and the amount of air blown from the air outlet provided in the vehicle interior of the vehicle by the electric power supplied from the charged power storage means;
Vehicle interior temperature detecting means for detecting the temperature in the vehicle interior;
Surface temperature detecting means for detecting the surface temperature of the part that the passenger contacts during riding
Control means for operating the adjusting means with the ability set based on the temperature in the passenger compartment and the surface temperature when instructed to perform pre-air conditioning for air conditioning in the passenger compartment before the passenger gets on board,
A vehicle air conditioner comprising   The control means is configured such that the absolute value of the difference between the temperature in the vehicle interior and the target vehicle interior temperature is greater than or equal to a first threshold value, and the absolute value of the difference between the surface temperature and the target surface temperature is greater than or equal to a second threshold value. When the condition is satisfied, the adjusting means is operated with a first ability lower than the maximum ability of the adjusting means, and when the condition is not satisfied, with a second ability higher than the first ability. The vehicle air conditioner according to claim 1, wherein the adjusting means is operated. The adjusting means includes a compressor and a blower fan that are operated by electric power supplied from the power storage means,
When the condition is satisfied, the control means operates the compressor at a first rotational speed lower than the maximum rotational speed and operates the blower fan at a first air volume that is smaller than the maximum air volume. Is not satisfied, the compressor is operated at a second rotational speed higher than the first rotational speed, and the blower fan is operated at a second air volume larger than the first air volume. The vehicle air conditioner according to claim 1 or 2.   The vehicle air conditioner according to claim 3, wherein the second rotational speed is a maximum rotational speed, and the second air volume is a maximum air volume.   The vehicle air conditioner according to any one of claims 1 to 4, wherein the portion that the occupant contacts is a seat on which the occupant is seated. Further comprising detection means for detecting the amount of electricity stored in the electricity storage means,
The said control means stops the operation | movement of the said pre air conditioning, when the electrical storage amount detected by the said detection means is below predetermined amount, The operation of the said any one of Claim 1 thru | or 5 characterized by the above-mentioned. Vehicle air conditioner.

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